Projector and control method

Projector and control method
USOO8820945B2
(12) Unlted States Patent
(10) Patent N0.:
Tsukagoshi
(45) Date of Patent:
(54)
PROJECTOR AND CONTROL METHOD
(75)
Inventor:
( 73 )
A
*
Shinichi Tsukagoshi, Azumino (JP)
_
-
( ) Notlce.
-
-
Sep. 2, 2014
FOREIGN PATENT DOCUMENTS
JP
JP
JP
'
I s 'k E
ss1gnee
e1 0 pson C orpora t'lOIl, Tokyo (JP)
.
US 8,820,945 B2
05-011164
5-11164 A
2000-081601 A
JP
-
Subject to any d1scla1mer, the term ofth1s
*
4/1991
1/1993
3/2000
2006406581 A
JP
3820546
JP
............. .. G02B 7/06
4/2006
B
9/2006
2009_075147 A
4/2009
patent 1s extended or adjusted under 35
U.S.C. 154 b b 277 d
( ) y
ays
.
OTHER PUBLICATIONS
(21) Appl' NO': 13/315504
Machine translation ofJP 05-011164 (Dec. 6, 2013).*
(22)
* Cited by examiner
F11ed:
Dec. 9, 2011
(65)
Prior Publication Data
US 2012/0147340 A1
(30)
Foreign Application Priority Data
Dec. 10,2010
(51)
(52)
(58)
Jun. 14, 2012
(JP) ............................... .. 2010-275457
Int. Cl.
G03B 21/14
(2006.01)
H04N 9/31
(2006.01)
G03B 3/12
(200601)
Primary Examiner * Francis M Legasse, Jr.
A
' t
tE
'
i J
B
k
SSIS an xammer
erry r00 S
(74) Attorney, Agent, or Firm * ALG Intellectual Property,
LLC
(57)
ABSTRACT
_
_
_
_
_
_
A proJector 1ncludes a lens dnvmg sect10n that dr1ves a lens
us CL
section having a projection lens, an accepting section that
CPC ______________ __ G03B 3/12 (201301). H04N 9/3102
accepts ?rst control value indication information indicating a
(201301); G033 21/142 (501301); G033
2205/0046 (201301)
?rst control value including a drive instruction value of the
lens section, a determining section that determines Whether a
USPC ......................................... .. 353/100; 359/460
drive instruction direction for the lens section is a ?rst drive
Field of Classi?cation Search
USPC _____________________ __ 353/100, 74, 69, 101; 359/460
direction that is same as the last drive direction or a second
drive direction that is different from the last drive direction,
See application ?le for complete search history
and a control section that drives the lens section by using a
second control value Whose drive instruction value is greater
than the drive instruction value of the ?rst control value in
(56)
References Cited
Us. PATENT DOCUMENTS
6,282,379 B1
8/2001 Ide et a1.
6,592,228 B1 *
7,559,658 B2 *
7/2003
7/2009
Kawashima et a1. ....... .. 353/101
Kamiya et a1. .............. .. 353/101
case that the drive instruction direction is the second drive
direction.
5 Claims, 12 Drawing Sheets
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1
2
PROJECTOR AND CONTROL METHOD
A control method according to another aspect of the inven
tion is a control method in a projector including a lens driving
section that drives a lens section having a projection lens and
an accepting section that accepts ?rst control value indication
information indicating a ?rst control value, wherein the pro
jector determines the ?rst control value based on the ?rst
control value indication information, determines whether a
The entire disclosure of Japanese Patent Application No.
2010-275457, ?led Dec. 10, 2010 is expressly incorporated
by reference herein.
BACKGROUND
drive instruction direction for the lens section is a ?rst drive
direction that is same as the last drive direction of the lens
section or a second drive direction that is different from the
1. Technical Field
The present invention relates to projectors and control
methods.
2. Related Art
For example, in JP-A-2009-75147, a projector having a
last drive direction of the lens section, and controls the lens
driving section by using the ?rst control value for driving the
motorized zoom function, a motorized focus function, and a
motorized lens shift function is described. In general, these
functions are realized by driving a motor that drives a lens
section including a projection lens. When the user uses such
a projector, the user can adjust the size, the display position,
etc. of an image by pressing an operation key (for example, a
numeric key or a direction key) provided in a remote control
ler or a projector main body. In the case of long-pressed key
20
operation in which the time in which the operation key is
being pressed exceeds a prescribed time, the projector con
tinuously drives the motor while the operation key is being
lens section to the drive instruction direction by the lens
driving section in case that determining that the drive instruc
tion direction is the ?rst drive direction, and controls the lens
driving section by using a second control value whose drive
instruction value of the lens section is greater than the drive
instruction value of the ?rst control value for driving the lens
section to the drive instruction direction by the lens driving
section in case that determining that the drive instruction
direction is the second drive direction.
According to the aspects of the invention, the projector can
drive the lens section in response to requests from the user by
accepting the ?rst control value indication information, deter
which the operation key is being pressed is equal to or shorter
mining the ?rst control value, and driving the lens section by
using the ?rst control value. Moreover, according to the
than the prescribed time, the projector drives the motor for a
time corresponding to a prescribed value. More speci?cally,
ence of backlash and increase responsiveness to an instruc
pressed; in the case of normal operation in which the time in
25
aspects of the invention, the projector can reduce the in?u
tion for lens shift etc. by driving the lens section by using the
the user can make ?ne adjustments to the position etc. of the
image by pressing the operation key several times, each press
30
being performed for a short period of time.
However, when the amount of driving of the motor by one
second control value whose drive instruction value of the lens
section is greater than the drive instruction value of the ?rst
control value in case that the drive instruction direction is the
normal operation of the operation key is ?xed, the projector
second drive direction. Therefore, the projector can improve
sometimes cannot deal appropriately with the requests of the
user, the projection status of the image, and the like. For
the convenience of the user and perform control related to the
movement of a projection lens more appropriately.
35
example, there are a user who desires to make ?ne adjust
ments to the image even when the movement of the motor is
BRIEF DESCRIPTION OF THE DRAWINGS
slow and a user who desires to move the motor quickly even
The invention will be described with reference to the
if the image changes signi?cantly. Furthermore, since a gear
is used in a drive mechanism of the lens section, backlash
occurs. For example, the user has to press the operation key
several times to move the lens section in one direction (for
example, to the right at the time of motorized lens shift) and
then move the lens section in the opposite direction (in this
case, to the left).
40
45
SUMMARY
50 ment.
FIG. 5 is a diagram showing the relationship between nor
mal operation and motor drive in the ?rst embodiment.
can be implemented as the following forms or aspects.
A projector according to an aspect of the invention
includes: a lens driving section that drives a lens section
FIG. 6 is a ?owchart showing an example of a control value
determination procedure in the ?rst embodiment.
having a projection lens; an accepting section that accepts
?rst control value indication information indicating a ?rst
control value; a determining section that determines whether
55
FIG. 7 is a diagram showing an example of an environmen
60
tal setting image in the ?rst embodiment.
FIG. 8 is a diagram showing another example of the envi
ronmental setting image in the ?rst embodiment.
FIG. 9 is a diagram showing another example of the envi
ronmental setting image in the ?rst embodiment.
a drive instruction direction for the lens section is a ?rst drive
direction that is same as the last drive direction of the lens
section or a second drive direction that is different from the
last drive direction of the lens section; and a control section
that controls the lens driving section by using a second control
value whose drive instruction value of the lens section is
greater than the drive instruction value of the ?rst control
value for driving the lens section to the drive instruction
direction by the lens driving section in case that the determin
ing section determines that the drive instruction direction is
the second drive direction.
elements.
FIG. 1 is a diagram showing a projection status in a ?rst
embodiment.
FIG. 2 is a functional block diagram of a projector in the
?rst embodiment.
FIG. 3 is a hardware block diagram of the projector in the
?rst embodiment.
FIG. 4 is a diagram showing the relationship between long
pressed key operation and motor drive in the ?rst embodi
An advantage of some aspects of the invention is to solve at
least part of the problems described above and the invention
accompanying drawings, wherein like numbers reference like
65
FIG. 10 is a diagram showing an example of a ?rst control
value in the ?rst embodiment.
FIG. 11 is a diagram showing an example of a second
control value in the ?rst embodiment.
FIG. 12 is a ?owchart showing an example of a control
procedure at the time of normal operation in the ?rst embodi
ment.
US 8,820,945 B2
4
3
FIG. 13 is a ?owchart showing an example of a second
light valve 994, a lens 995, and the like. Moreover, the pro
control value setting procedure at the time of leftward lens
jector 100 also has a power supply 930 or the like. Inciden
shift in a second embodiment.
tally, the lens 995 is actually formed of a plurality of lenses
FIG. 14 is a diagram showing an example of how to deter
mine the second control value in the second embodiment.
FIG. 15 is a diagram showing an example of an environ
mental setting image in a third embodiment.
such as a zoom lens, a focus lens, and a projection lens.
Furthermore, the lens driving section 184 for making focus
adjustment and ?eld angle (zoom) adjustment may be a motor
FIG. 16 is a diagram showing another example of the
environmental setting image in the third embodiment.
deceleration mechanism 974 adjusting the rotational speed of
972, a motor driver circuit 970 for driving the motor 972, a
the motor 972, a conversion mechanism 976 converting the
rotational motion of the motor 972 into linear motion, and the
like. The position detecting section 186 for this purpose may
DESCRIPTION OF EXEMPLARY
EMBODIMENTS
be an encoder 978 or the like that is connected to the decel
eration mechanism 974 and acquires positional information
Hereinafter, embodiments of the invention which is
applied to a projector will be described with reference to the
drawings. It should be understood that the embodiments
of the lens 995 (the focus lens or the zoom lens) via the
deceleration mechanism 974. Moreover, the lens driving sec
tion 184 for performing lens shift may be a motor driver
described below are not meant to limit the scope of the inven
tion claimed in the appended claims in any way, and all the
con?gurations described in the embodiments are not always
necessary for means of the invention claimed in the appended
circuit 980, a motor 982, a deceleration mechanism 984, a
conversion mechanism 986, and the like. The position detect
20
claims for solving the problems.
First Embodiment
FIG. 1 is a diagram showing a projection status in a ?rst
embodiment. A projector 100 receives an image signal from a
DVD player 200 via an HDMI cable 300 and projects an
25
The user can move the projection lens etc. in an intended
by operating a direction key or the like of the remote control
ler 400. FIG. 4 is a diagram showing the relationship between
image 20 onto a screen 10 based on the image signal. The user
30
make these adjustments by adjusting the position of a lens
section (for example, a lens-barrel, a zoom lens, and a focus
lens) having a projection lens. To drive the lens section in
accordance with the setting made by the user and reduce the
in?uence of backlash when the lens section is driven, the
projector 100 of this embodiment has the function of accept
35
pressed (turned on) till when the direction key is released
(turned off) so as to be longer than a prescribed time or to be
equal to or longer than the prescribed time. Moreover, for
40
The storing section 120 stores image data 122, control data
124, user set data 126, and the like. Moreover, the projecting
50
shorter than the prescribed time. Here, the prescribed time is
The projector 100 determines a ?rst control value as a
control value (a drive instruction value) when the lens 995 is
driven in the same direction at the time of normal operation
described above, and determines a second control value as a
184 that drives the lens section 182, and a position detecting
section 186 that detects the position etc. of the lens section
55
FIG. 3 is a hardware block diagram of the projector 100 in
the ?rst embodiment. For example, the signal inputting sec
tion 110 may be HDMI terminals 910 and 911, a selector 912,
a receiving circuit 914, and the like, the storing section 120
control value when the lens 995 is driven in the opposite
direction. Here, a procedure by which each control value is
determined will be described. FIG. 6 is a ?owchart showing
an example of a control value determination procedure in the
?rst embodiment.
The user operates the remote controller 400 and thereby
issues a projection instruction to the projector 100 to project
an environmental setting image (a control value accepting
60
image). The control section 150 performs control to make the
image generating section 140 generate the environmental
setting image in accordance with the projection instruction
accepted by the accepting section 160. In response to the
control, the image generating section 140 generates the envi
section 152, and the time measurement section 154 may be a
CPU 950 or the like, the accepting section 160 may be a
system 992, a liquid crystal driver circuit 993, a liquid crystal
released is shorter than the prescribed time or equal to or
any time in the 0.1- to l-second range, for example.
section 180 includes a lens section 182, a lens driving section
receiving unit 960 or the like, and the projecting section 180
may be a lamp driver circuit 990, a lamp 991, an illumination
example, the user can drive the motor 982 in accordance with
the number of operations of the direction key and thereby
move the lens section 182 little by little by performing normal
operation in which the time from when the direction key for
lens shift operation is pressed till when the direction key is
45
may be RAM 920, ?ash ROM 922, and the like, the image
generating section 140 may be an image processing circuit
940 or the like, the control section 150, the determining
and thereby continuously move the lens section 182 by setting
the time from when a direction key for lens shift operation is
indication information from the remote controller 400, a
determining section 152 that makes a determination etc. of
the contents of the indication information, a time measure
ment section 154, a control section 150 that controls the time
measurement section 154 etc., and a projecting section 180.
182.
long-pressed key operation and motor drive in the ?rst
embodiment. Moreover, FIG. 5 is a diagram showing the
relationship between normal operation and motor drive in the
?rst embodiment.
For example, the user can continuously drive the motor 982
ing an instruction for a control value when the lens section is
driven and the function of adjusting the driving of the lens
section in the opposite direction.
FIG. 2 is a functional block diagram of the projector 100 in
the ?rst embodiment. The projector 100 includes a signal
inputting section 110 to which an image signal etc. from the
DVD player 200 is input, a storing section 120, an image
generating section 140, an accepting section 160 that accepts
and acquires positional information of the lens 995 (the pro
jection lens) via the conversion mechanism 986. As described
above, the projector 100 has a hardware con?guration for
performing motorized zoom, focus, and lens shift.
direction and thereby adjust the position etc. of the image 20
adjusts the focus, the size, the position, etc. of the image 20 by
operating a remote controller 400. The projector 100 can
ing section 186 for this purpose may be a linear sensor 988 or
the like that is connected to the conversion mechanism 986
65
ronmental setting image based on the image data 122 and the
user set data 126, and the projecting section 180 projects the
environmental setting image (step S1).
US 8,820,945 B2
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5
information indicating the selection from the remote control
ler 400, and the control section 150 updates the user set data
FIG. 7 is a diagram showing an example of an environmen
tal setting image 500 in the ?rst embodiment. For example,
the user makes the projector 100 project the environmental
126 so that the user set data 126 indicates the selection (step
S2) and determines the ?rst control value based on the user set
setting image 500 by pressing a menu key (not shown) pro
vided in the remote controller 400. The environmental setting
data 126 and the control data 124 (step S3). Here, the setting
image 500 includes the following setting items: “image qual
of the ?rst control value in accordance with each option will
be described.
FIG. 10 is a diagram showing an example of the ?rst
control value in the ?rst embodiment. A table shown in FIG.
10 is stored in the storing section 120 as part of the control
data 124. In the table, control values in accordance with the
type: zoom, focus, and lens shift, the drive direction, and the
setting are set. Moreover, the above setting is determined in
accordance with the option selected in the environmental
ity adjustment”, “picture”, “setting”, “memory”, “networ ”,
“information”, and “initialization”. Moreover, “setting”
includes, as subordinate items thereof, “lock setting” by
which the setting to lock the key operation of the projector
100 and a lens section adjustment is made, “projection” by
which the setting of a method for proj ecting an image is made,
“standby mode” by which the setting of network monitoring
and control function at the time of standby is made, “opera
tion setting” by which the setting of operation of the projector
100 is made, “display” by which the setting of the display
position, the display color, etc. of the menu is made, “input
signal” by which the setting of an input signal system such as
setting image 502. For example, when option “2” is selected,
NTSC or PAL is made, “language” by which the setting of a
display language is made, and “initialization” by which the
20
“setting 2” is used as the ?rst control value; when option “3”
is selected, “setting 3” is used as the ?rst control value; and
when option “1” is selected, “setting 1” is used as the ?rst
control value.
Incidentally, in FIGS. 10 and 11, the numeric value repre
set value is initialized.
Furthermore, FIG. 8 is a diagram showing an example of an
sents the time (millisecond) of a drive instruction for the lens
section 182. That is, the settings are made so that the time of
environmental setting image 501 in the ?rst embodiment. For
example, the user makes the projector 100 project the envi
a drive instruction becomes longer in the order of setting 3,
setting 2, and setting 1. Moreover, as to “up” and “down” of
ronmental setting image 501 by selecting “operation setting”
25
in the environmental setting image 500. The environmental
setting image 501 includes the following items: “direct
time of a drive instruction to perform downward lens shift.
Furthermore, the control section 150 determines the sec
ond control value in accordance with the determined ?rst
power-on” by which the setting as to whether or not the
projector 100 starts to operate by the tum-on of a main power
supply switch is made, “sleep mode” by which the setting as
30
to whether or not the power supply is automatically turned off
when a state in which no signal is supplied continues for a
given period of time is made, “illumination” by which the
setting as to whether or not an indicator provided in the
projector 100 is turned off is made, “TriggerOut 1” and “Trig
lens shift, the settings are made so that the time of a drive
instruction to perform upward lens shift is longer than the
35
gerOut 2” by which the setting as to whether or not a control
control value (step S4). FIG. 11 is a diagram showing an
example of the second control value in the ?rst embodiment.
A method for determining the second control value may be a
method by which a constant is added to the ?rst control value,
a method by which the ?rst control value is multiplied by a
constant, and the like. For example, when the type is lens
shift, the control section 150 can determine the second control
signal controlling an external device is output is made,
value by multiplying the ?rst control value by 8. Incidentally,
“upland mode” by which the setting as to whether or not the
the second control value may be stored in the storing section
120 as part of the control data 124, or may be determined by
projector 100 is located at a height of 1500 m or more above
sea level, and “lens key operation setting” by which the
amount of adjustment at the time of lens adjustment per
formed by using a lens key is set.
In addition, FIG. 9 is a diagram showing an example of an
environmental setting image 502 in the ?rst embodiment. For
example, the user makes the projector 100 project the envi
40
Here, a control procedure at the time of normal operation
will be described. FIG. 12 is a ?owchart showing an example
45
ronmental setting image 501 by selecting “operation setting”
in “setting” in the environmental setting image 500. More
over, for example, the user makes the projector 100 project
the environmental setting image 502 by selecting “lens key
operation setting” in the environmental setting image 501.
an operation based on the ?rst control value every time con
trol is performed.
50
of the control procedure at the time of normal operation in the
?rst embodiment. When the accepting section 160 accepts the
indication information indicating the drive instruction of the
lens section 182 from the remote controller 400, the deter
mining section 152 reads the last drive direction of the lens
section 182 from the user set data 126 (step S11). Incidentally,
as will be described later, the control section 150 stores the
Incidentally, in the environmental setting images 500 to 502,
as guidance in operating the environmental setting images
last drive direction of the lens section 182 in the storing
500 to 502, keys for performing “return” to return to the
superordinate item, “selection” to select a setting item, “con
?rm” to con?rm the setting item, and “end” to end the pro
jection of the environmental setting images 500 to 502 are
The determining section 152 determines whether the
present drive instruction direction indicated by the indication
section 120 as part ofthe user set data 126.
55
information is a ?rst drive direction that is same as the last
drive direction or a second drive direction that is different
displayed. Furthermore, the environmental setting images
from the last drive direction (step S12). Incidentally, in this
500 to 502 may be OSD (on screen display) images.
case, the determining section 152 determines that the present
The environmental setting image 502 includes images rep
drive instruction direction is the same as the last drive direc
resenting option “2” by which a standard value is used as the
?rst control value, option “3” by which a value whose drive
instruction value is greater than that of the standard value is
used as the ?rst control value, and option “1” by which a value
whose drive instruction value is smaller than that of the stan
60
dard value is used as the ?rst control value. The user selects an
65
intended option by operating the remote controller 400. The
accepting section 160 accepts ?rst control value indication
tion when the present drive instruction direction is virtually
the same as the last drive direction (for example, when the
present drive instruction direction is left and the last drive
direction is upper left in a state in which lens shift drive in
eight directions is implemented) even when the directions are
not identical with each other.
In that case the present drive instruction direction is the ?rst
drive direction in step S12, the control section 150 determines
US 8,820,945 B2
7
8
the drive instruction time based on the drive instruction direc
right (step S21) and makes the lens driving section 184 stop
driving the lens section 182 (step S22).
tion and the ?rst control value determined by the control data
124 and the user set data 126 (step S13). On the other hand, in
that case the present drive instruction direction is the second
drive direction in step S12, the control section 150 determines
Then, the control section 150 makes the time measurement
section 154 start to perform time measurement and at the
the drive instruction time based on the second control value
same time controls the lens driving section 184 and thereby
makes the lens driving section 184 start to drive the lens
determined by the ?rst control value (step S14).
section 182 to the left (step S23).
The control section 150 determines whether or not the
Then, the control section 150 updates the user set data 126
by setting the present drive instruction direction as the last
drive direction of the lens section 182 (step S15), and controls
the lens driving section 184 so that the lens driving section
184 drives the lens section 182 in accordance with the deter
mined drive instruction time (step S16). The control section
position of the lens section 182 has changed based on the
information from the position detecting section 186 (step
S24). If the position of the lens section 182 has changed, the
control section 150 makes the time measurement section 154
stop time measurement and at the same time controls the lens
driving section 184 and thereby makes the lens driving sec
tion 184 stop driving the lens section 182 to the left (step S25).
150 determines whether or not the drive instruction time has
elapsed based on a timer value from the time measurement
section 154 while the control section 150 is controlling the
lens driving section 184 (step S17). If the drive instruction
time has elapsed, the control section 150 makes the lens
driving section 184 stop driving the lens section 182 (step
20
S18); if the drive instruction time has not elapsed, the control
section 150 makes the lens driving section 184 continue to
drive the lens section 182.
As described above, according to this embodiment, the
projector 100 can drive the lens section 182 in response to
Then, the control section 150 determines the second con
trol value based on the timer value obtained by the time
measurement performed by the time measurement section
154 (step S26). Speci?cally, as shown in FIG. 14, even when
a point of time at which a change in the position of the lens
section 182 is detected by the position detecting section 186
is T2, it includes an error L1 (a ?xed value) due to the resolv
25
ing power of a sensor implemented in the position detecting
section 186. For example, when the sensor is 8 bit, the resolv
ing power has only 256 levels, and this may be insuf?cient for
requests from the user by accepting the ?rst control value
control on a dot-by-dot basis or control on the millisecond
indication information, determining the ?rst control value,
and driving the lens section 182 by using the ?rst control
value. Moreover, according to this embodiment, the projector
time scale. Moreover, even when a drive stop instruction for
100 can reduce the in?uence of backlash and increase respon
siveness to an instruction for lens shift etc. by driving the lens
the lens section 182 is issued, it takes time L2 (a ?xed value)
before the point of time t2 at which the lens section 182 comes
30
to a standstill after reducing speed. Therefore, the control
section 150 can determine a point of time (time) T1 as the
section 182 by using the second control value whose drive
second control value, the point of time (time) T1 obtained by
instruction value of the lens section 182 is greater than that of
the ?rst control value in that case the drive instruction direc
tion is the second drive direction.
adding L1 and L2, for example.
As described above, according to this embodiment, since
subtracting, from the point of time T2, a value obtained by
35
the projector 100 can determine the second control value by
actually driving the lens section 182, the projector 100 can
Therefore, the projector 100 can improve the convenience
of the user and perform control related to the movement of the
lens 995 more appropriately. For example, when an instruc
tion for lens shift etc. is performed, the projector 100 can
perform lens shift etc. in response to requests from a user who
desires to make ?ne adjustments even if the movement of the
lens is slow, a user who desires to move the lens quickly even
if the movement of the lens is not smooth, and the like.
Moreover, according to this embodiment, the projector 1 00
projects the environmental setting image 502 showing a plu
rality of options with different control values and accepts the
perform control related to the movement of the lens 995 more
accurately.
40
Third Embodiment
Moreover, the projector 100 may determine the second
control value in response to an instruction from the user as is
45
the case with the ?rst control value. Furthermore, the envi
ronmental setting image 502 is an image indirectly indicating
the ?rst control value; however, an image directly indicating
?rst control value indication information, whereby the user
can issue an instruction by selecting an intended option in the
Second Embodiment
the control value may be adopted. FIG. 15 is a diagram
showing an example of an environmental setting image 503 in
a third embodiment, and FIG. 16 is a diagram showing an
example of an environmental setting image 504 in the third
embodiment.
In the ?rst embodiment, the projector 100 determines the
second control value by using a ?xed value; however, the
projector 100 may determine the second control value in
For example, the projecting section 180 projects the envi
ronmental setting image 503 including, in addition to “lens
key operation setting 1” for accepting a selection of the ?rst
control value, “lens key operation setting 2” for accepting a
environmental setting image 502. In this way, the projector
100 can improve the convenience of the user.
50
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accordance with an actual drive status. FIG. 13 is a ?owchart
selection of the second control value. Moreover, when “lens
showing an example of a second control value setting proce
key operation setting 2” is selected, the projecting section 180
projects the environmental setting image 504 by which the
dure at the time of leftward lens shift in a second embodiment.
Moreover, FIG. 14 is a diagram showing an example of how
to determine the second control value in the second embodi
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second control value is determined for each option. The envi
ronmental setting image 504 is an image in which the second
ment.
control values in accordance with a combination of an option
For example, the projector 100 may determine the second
control value when performing calibration. When the second
control value at the time of left lens shift, for example, is set,
the control section 150 controls the lens driving section 184
and thereby temporarily drives the lens section 182 to the
(1 to 3), the type of lens drive, and a lens drive direction are
displayed, the image that accepts a second control value
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adjustment instruction as a result of the user operating the
remote controller 400. The control section 150 updates the
second control value stored in the user set data 126 in accor
US 8,820,945 B2
10
dance with the second control value adjustment instruction,
and performs control in accordance with the updated second
a plurality of options to which different values are
applied as the ?rst control value;
an accepting section that accepts the ?rst control value
control value.
indication information;
As described above, according to this embodiment, the
projector 100 can perform control in response to requests
a determining section that determines whether a drive
instruction direction for the lens section is a ?rst drive
direction that is same as the last drive direction of the
lens section or a second drive direction that is different
from the user even when driving the lens section 182 in the
opposite direction.
Other Embodiments
from the last drive direction of the lens section; and
a control section that
It is to be understood that application of the invention is not
limited to the embodiments described above, and modi?ca
tions are possible. For example, the con?gurations of the
embodiments described above may be combined. Speci?
controls the lens driving section by using the ?rst control
cally, by combining the second embodiment and the third
drive instruction direction is the ?rst drive direction,
and
controls the lens driving section by using a second con
trol value whose drive instruction value is greater than
the drive instruction value of the ?rst control value for
driving the lens section to the drive instruction direc
tion by the lens driving section based on a determina
value for driving the lens section to the drive instruc
tion direction by the lens driving section based on a
determination by the determining section that the
embodiment, for example, the projector 100 can correct the
second control value determined by calibration in response to
an instruction from the user.
Moreover, the control value (the drive instruction value) is
not limited to a drive time and may be, for example, drive
power, a drive speed, and a drive distance (a value obtained by
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multiplying a drive speed by a drive time). Furthermore, the
tion by the determining section that the drive instruc
projector 100 may make the user set a drive speed when the
user issues an instruction whose time from when the instruc
tion operation is turned on till when it is turned off is longer
tion direction is the second drive direction.
2. The projector according to claim 1, wherein
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than the prescribed time, and drive the lens section 182 in
accordance with the drive speed. This allows the user to
perform lens shift etc. at an intended drive speed.
Furthermore, a device that outputs control value indication
information to the projector 100 is not limited to the remote
controller 400 and may be, for example, a portable terminal
3. The projector according to claim 1, wherein
the accepting section accepts second control value indica
tion information indicating the second control value, and
30
device such as a mobile telephone or a smartphone, a PC
(personal computer), and a mouse. In addition, projection of
the environmental setting image 503 and the like is not nec
essary, and control value indication information may be input
35
to the projector 100 from a portable terminal device such as a
mobile telephone.
Moreover, the projector 100 may have one or two of the
three functions: zoom, focus, and lens shift, and does not need
to have all of them. Furthermore, in the embodiments
described above, three types (three levels) of control value are
provided as selectable control values. However, two types of
control value may be provided, and four or more types of
control value may be provided.
In addition, the computer of the projector 100 may read a
program product stored in an information storage medium
40
section in case that the time of the drive instruction
45
50
the projector
projects an accepting image accepting the ?rst control
value indication information indicating a ?rst control
value including a drive instruction value of the lens
section, the accepting image including a plurality of
options to which different values are applied as the
55
such as a laser diode or an LED. In addition, the function of
?rst control value,
accepts ?rst control value indication information,
determines whether a drive instruction direction for the
lens section is a ?rst drive direction that is same as the
last drive direction of the lens section or a second
drive direction that is different from the last drive
1. A projector, comprising:
direction of the lens section, and
controls the lens driving section by using the ?rst control
a lens driving section that drives a lens section having a
projection lens;
value of the lens section, the accepting image including
accepted by the accepting section is longer than the
prescribed time.
5. A control method in a projector including a lens driving
section that drives a lens section having a projection lens,
wherein
the projector 100 may be distributed among a plurality of
devices (for example, a PC and a projector).
What is claimed is:
cating a ?rst control value including a drive instruction
accepted by the accepting section is equal to or shorter
than a prescribed time,
tinuously driving the lens section by the lens driving
and a self light-emitting device including a solid light source
a projecting section that projects an accepting image
accepting ?rst control value indication information indi
4. The projector according to claim 1, wherein
the accepting section accepts drive indication information
indicating a drive instruction for the lens section, and
the control section performs control on the lens driving
section by using the ?rst control value or the second
and performs control on the lens driving section for con
crystal projector (a transmissive liquid crystal projector and a
re?ective liquid crystal projector such as LCOS) and may be,
for example, a projector using a digital micromirror device.
Moreover, the projecting section 180 may adopt, in place of a
lamp, an organic EL device, a silicon light-emitting device,
the control section determines the second control value
based on the second control value indication informa
tion.
control value in case that the time of the drive instruction
and function as the control section 150 or the like. As such an
information storage medium, a CD-ROM, a DVD-ROM,
ROM, RAM, and an HDD, for example, can be used.
Furthermore, the projector 100 is not limited to a liquid
the control section determines the second control value in
accordance with the ?rst control value.
65
value for driving the lens section to the drive instruc
tion direction by the lens driving section based on a
determination that the drive instruction direction is
the ?rst drive direction, and controls the lens driving
section by using a second control value whose drive
US 8,820,945 B2
11
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instruction value is greater than the drive instruction
value of the ?rst control value for driving the lens
section to the drive instruction direction by the lens
driving section based on a determination that the drive
instruction direction is the second drive direction.
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