JP2009204920A - Display device and program - Google Patents

Abstract

A display device and the like capable of adjusting luminance of a light source corresponding to user settings and adaptation.
A projector, which is a type of display device, sets a plurality of types of light source control data 126 for controlling a light source for display 170, luminance setting data 122 indicating display luminance settings, and display mode settings. A storage unit that stores display mode data 124 to be displayed, a luminance setting data 122, a determination unit 150 that determines light source control data 126 to be applied from a plurality of types of light source control data 126 based on the display mode data 124, and a determination unit Based on the light source control data 126 determined by 150, a control unit 160 that performs control to gradually reduce the luminance of the light source 170 is configured.
[Selection] Figure 1

Description

  The present invention relates to a display device and a program having a function of adjusting luminance of a light source.

For example, a display device such as a television or a projector displays an image with the luminance of the light source fixed, and the life of the light source tends to be shortened. In addition, there is a display device having a power saving function that adjusts the brightness of an image by measuring the brightness of ambient light using a sensor, but adaptation to human eyes is not considered. As a display device corresponding to such adaptation, Japanese Patent Laid-Open No. 2004-264668 discloses a luminance measuring unit that measures the luminance of an image, and controls the luminance of the lamp according to the measurement result of the luminance measuring unit, The brightness is calculated with the visual dark adaptation time constant, and the lamp brightness is reduced when the calculation result is below a predetermined value, and the lamp brightness is increased when the image brightness is above a predetermined value. A projector provided with brightness control means is described.
JP 2004-264668 A

  However, the method of adjusting the brightness of the image according to the brightness of the surroundings or the method of adjusting the brightness of the lamp in consideration of adaptation alone cannot perform the brightness adjustment according to the user setting.

  The objective of this invention is providing the display apparatus and program which can perform the brightness | luminance adjustment of the light source corresponding to a user setting and adaptation.

  In order to solve the above problems, a display device according to the present invention includes a plurality of types of light source control data for controlling a light source for display, luminance setting data indicating display luminance settings, and a display indicating display mode settings. A storage unit that stores mode data; a determination unit that determines light source control data to be applied from the plurality of types of light source control data based on the luminance setting data and the display mode data; and the determination unit And a control unit that performs control to gradually decrease the luminance of the light source based on the light source control data.

  Further, the program according to the present invention is a program for controlling a light source for display, and the computer sets a plurality of types of light source control data for controlling the light source and luminance setting data indicating setting of display luminance. And a storage unit that stores display mode data indicating display mode settings, a determination for determining light source control data to be applied from the plurality of types of light source control data based on the luminance setting data and the display mode data And a control unit that performs control to gradually reduce the luminance of the light source based on the light source control data determined by the determination unit.

  According to the present invention, the display device or the like determines the light source control data based on the brightness setting data and the display mode data, and performs control to gradually decrease the brightness of the light source using the light source control data. It is possible to adjust the brightness of the light source corresponding to the setting and adaptation.

  In addition, the display device includes a determination unit that determines whether there is an instruction to change at least one of the setting of the display brightness and the setting of the display mode, and the determination unit, when there is the change instruction, The light source control data may be determined according to a change instruction.

  Further, the program causes the computer to function as a determination unit that determines whether there is an instruction to change at least one of the display luminance setting and the display mode setting, and the determination unit receives the change instruction. In this case, the light source control data may be determined according to the change instruction.

  According to this, even when there is a setting change instruction, the display device or the like can adjust the luminance of the light source corresponding to the changed user setting and adaptation.

  Embodiments in which the present invention is applied to a projector will be described below with reference to the drawings. In addition, the Example shown below does not limit the content of the invention described in the claim at all. In addition, all the configurations shown in the following embodiments are not necessarily essential as means for solving the invention described in the claims.

  FIG. 1 is a functional block diagram of a projector 100 in the present embodiment. A projector 100, which is a type of display device, includes an input unit 110 that inputs image signals and the like, a storage unit 120 that stores various data, an operation unit 130 that generates operation information in accordance with user operations, A determination unit 140 that performs determination and update of data in the storage unit 120, a determination unit 150, a light source 170 for display, a control unit 160 that controls the light source 170, a timer unit 162, and an image processing unit 180 The projection unit 190 is included.

  The storage unit 120 also stores brightness setting data 122 indicating display brightness settings, display mode data 124 indicating display mode settings, and a plurality of types of light source control data 126 for controlling the light source 170. If the determination unit 140 determines that there is a setting change instruction based on the operation information from the operation unit 130, the determination unit 140 updates the luminance setting data 122 or the display mode data 124 according to the change instruction.

  The determining unit 150 refers to the luminance setting data 122 and the display mode data 124 to determine the light source control data 126 to be applied according to the luminance setting and the display mode setting. Based on the determined light source control data 126, the control unit 160 controls the light source 170 so as to gradually decrease the luminance of the light source 170.

  Note that the projector 100 may implement the functions such as the determination unit 140 by reading the program 210 from the information storage medium 200. As such an information storage medium 200, for example, a CD-ROM, DVD-ROM, ROM, RAM, HDD or the like can be applied, and the reading method of the program 210 may be a contact method or a non-contact method. Good.

  The functions of the determination unit 140 and the like may be implemented in the projector 100 using the following hardware. FIG. 2 is a hardware block diagram of the projector 100 in this embodiment.

  For example, the image signal input terminal 920 or the like as the input unit 110, the RAM 950 or the like as the storage unit 120, the button 910 or the like as the operation unit 130, the ROM 960 or the CPU 970 that stores a program as the determination unit 140, the control unit, or the like The unit 160 includes a ROM 960, a CPU 970, a light source power supply control circuit (for example, a ballast) 980, the timer unit 162 includes a CPU 970, the light source 170 includes a lamp 990, the image processing unit 180 includes an image processing circuit 930, and the like. As 190, a liquid crystal panel 940, a projection lens, or the like may be used. These units may be formed to be able to communicate with each other via the system bus 900.

  Next, the light source control procedure in the projector 100 will be described in more detail. FIG. 3 is a flowchart showing a light source control procedure in this embodiment.

  When the projector 100 is activated or the video source is switched (source switching), the determination unit 150 determines the light source control data 126 to be applied based on the luminance setting data 122 and the display mode data 124 (step S1).

  Note that the brightness setting indicated by the brightness setting data 122 corresponds to, for example, high brightness, normal brightness, low brightness, and the like. The display mode indicated by the display mode data 124 corresponds to, for example, a presentation mode, a theater mode, a still image mode, and the like. Note that the brightness setting and display mode setting may be performed by the user, or may be performed in response to a control command from a server other than the projector 100 via the network.

  Here, it is assumed that the luminance setting data 122 is a high luminance setting and the display mode data 124 is a presentation mode setting in the initial setting.

  Based on the light source control data 126 determined by the determination unit 150, the control unit 160 controls the driving of the light source 170 so that the current luminance level (initial luminance level is the initial luminance level) (step S2). Further, the control unit 160 counts the elapsed time from the start of control based on the timer value of the timer unit 162 (step S3).

  Based on the operation information from the operation unit 130, the determination unit 140 determines whether there is a setting change instruction from the user (step S4). When there is a change instruction, the determination unit 140 updates the luminance setting data 122 or the display mode data 124 according to the change instruction (step S5).

  For example, when the user gives an instruction to change the luminance setting to low luminance, the determination unit 140 updates the luminance setting data 122 to indicate that the luminance setting is low luminance. For example, when the user gives an instruction to change the display mode to the theater mode, the determination unit 140 updates the display mode data 124 to indicate that the setting is the theater mode. When there is an instruction to change both the luminance setting and the display mode, the determination unit 140 updates the luminance setting data 122 and the display mode data 124.

  When the luminance setting data 122 or the display mode data 124 is updated, the determination unit 150 re-determines the light source control data 126 to be applied based on the luminance setting data 122 and the display mode data 124 (Step S1). Based on the light source control data 126 re-determined by the determination unit 150, the control unit 160 controls the driving of the light source 170 so that the initial luminance level is obtained (step S2). Further, the control unit 160 resets the control start time, and counts the elapsed time from the control start time after the reset based on the timer value of the timer unit 162 (step S3).

  Further, the determination unit 140 determines whether or not there is a source switching instruction from the user based on the operation information from the operation unit 130 (step S6). If there is a source switching instruction, the projector 100 starts the processing from step S1 again.

  On the other hand, when there is no source switching instruction, the control unit 160 determines whether or not a predetermined set time has elapsed from the start of control (step S7).

  Here, a change in light source luminance based on the light source control data 126 will be described. FIG. 4 is a diagram showing a change in light source luminance based on the high luminance, presentation mode light source control data 126 in the present embodiment.

  For example, in the high luminance and presentation mode, the light source luminance at the start of control t0 is L0, and the control unit 160 controls the driving of the light source 170 so that the light source luminance is L0 at the start of control. Further, when the elapsed time (set time) from the start of control reaches t1, the light source luminance decreases by one step, and when the elapsed time from the start of control reaches t2, the light source luminance further decreases by one step. . In this way, when the elapsed time from the start of control becomes t6 or more, the light source luminance becomes the lowest luminance Lm.

  FIG. 5 is a diagram showing a change in the light source luminance based on the high luminance, theater mode light source control data 126 in the present embodiment. FIG. 6 is a diagram showing changes in the light source luminance based on the light source control data 126 in the low luminance and still image mode in the present embodiment.

  For example, in the case of high luminance and theater mode, the light source luminance at the start of control is L′ 0, and when the elapsed time from the start of control becomes t′3 or more, the light source luminance is the lowest luminance L′ m. . In the high luminance and theater mode, the light source luminance gradually decreases as compared with the high luminance and presentation mode, and the difference between the initial light source luminance and the minimum luminance is small.

  Further, for example, in the case of the low luminance and still image mode, the light source luminance at the start of control is L ″ 0, and when the elapsed time from the start of control becomes t ″ 4 or more, the light source luminance is the lowest luminance L ″. In the case of low luminance, the initial light source luminance and minimum luminance are lower than in the case of high luminance.

  Thus, the light source control data 126 differs depending on the combination of the display luminance setting and the display mode setting. The light source control data 126 is formed so that an image is displayed with a luminance according to a combination of the display luminance setting and the display mode setting with the initial setting luminance, and the luminance is not excessively lowered with the minimum luminance. Is formed.

  Specifically, the light source control data 126 includes, for example, data indicating elapsed time such as t1 and t2, data indicating initial set luminance such as L0, data indicating minimum luminance such as Lm, and every elapsed time such as t1. Including data indicating the set brightness of.

  The light source control data 126 is data determined based on the user's familiarity (adaptation) to the brightness for each combination of the display brightness setting and the display mode setting. Specifically, the light source control data 126 may be generated by a calculation related to general adaptation or may be generated by an experiment. For example, the amount of change in the set brightness (for example, L1-L0) may be a change amount that is difficult for the user to perceive, and the interval of the set time (for example, t2-t1) is determined by the user to the current brightness. It may be determined based on the time to get used.

  When a predetermined set time has elapsed from the start of control (for example, when the elapsed time from the start of control is t1 or more), the control unit 160 refers to the light source control data 126 for the luminance level for controlling the light source 170. The luminance level is changed according to the elapsed time (step S8).

  Further, the control unit 160 refers to the light source control data 126 and determines whether or not the changed luminance level is the lowest luminance (for example, Lm) (step S9). Since it is not necessary to change the luminance level in the case of the minimum luminance, the projector 100 ends the light source control and continues normal projection.

  On the other hand, when the luminance level after the change is not the minimum luminance, projector 100 continues the processing from step S2 onward.

  As described above, according to the present embodiment, the projector 100 determines the light source control data 126 corresponding to the luminance setting and the display mode setting based on the luminance setting data 122 and the display mode data 124. The light source control data 126 is data generated according to adaptation. Therefore, the projector 100 controls the user setting and adaptation without making the user aware that the luminance has changed by performing control to gradually reduce the luminance of the light source 170 using the light source control data 126. The brightness of the light source 170 can be adjusted.

  Further, according to the present embodiment, since the minimum luminance is set for each combination of the luminance setting and the display mode in the light source control data 126, the projector 100 can perform user setting and adaptation without excessively reducing the luminance. The brightness of the corresponding light source 170 can be adjusted.

  Further, according to the present embodiment, the projector 100 can reduce the luminance of the light source 170 more than usual, so that the power consumption of the light source 170 can be suppressed and the usable time of the light source 170 can be extended.

  Further, according to the present embodiment, the projector 100 can adjust the luminance of the light source corresponding to the changed user setting and adaptation even when there is a setting change instruction. Further, according to the present embodiment, the projector 100 can perform appropriate brightness control by performing light source control from the initial brightness level when there is a setting change instruction or a source switching instruction. it can.

  In addition, application of this invention is not limited to the Example mentioned above, A various deformation | transformation is possible.

  Further, the light source control procedure is not limited to the procedure shown in FIG. 3, and the processing order can be changed. For example, the projector 100 may execute the processes of steps S4 to S7 after executing the processes of steps S8 and S9 after the process of step S3.

  Further, the display device is not limited to the projector 100, and may be a television, for example. The projector 100 is not limited to a liquid crystal projector, and may be a projector using a DMD (Digital Micromirror Device), for example. DMD is a trademark of Texas Instruments Incorporated. Further, the function of the projector 100 may be distributed and implemented in a plurality of devices (for example, a PC and a projector).

It is a functional block diagram of the projector in a present Example. It is a hardware block diagram of the projector in a present Example. It is a flowchart which shows the light source control procedure in a present Example. It is a figure which shows the change of the light source luminance based on the light source control data of the high-intensity and presentation mode in a present Example. It is a figure which shows the change of the light source brightness based on the light source control data of the high brightness | luminance and theater mode in a present Example. It is a figure which shows the change of the light source luminance based on the light source control data of the low-intensity and still image mode in a present Example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 Projector (display device) 110 Input part 120 Storage part 122 Brightness setting data 124 Display mode data 126 Light source control data 130 Operation part 140 Determination part 150 Determination part 160 Control part 162 Timer part 170 light source, 180 image processing unit, 190 projection unit, 200 information providing device, 210 program

Claims (3)

A storage unit for storing a plurality of types of light source control data for controlling a light source for display, luminance setting data indicating display luminance setting, and display mode data indicating display mode setting;
A determination unit that determines light source control data to be applied from the plurality of types of light source control data based on the brightness setting data and the display mode data;
Based on the light source control data determined by the determination unit, a control unit that performs control to gradually reduce the luminance of the light source;
A display device comprising: The display device according to claim 1,
A determination unit that determines whether there is an instruction to change at least one of the setting of the display brightness and the setting of the display mode;
The determination unit determines the light source control data according to the change instruction when the change instruction is received,
The display device according to claim 1, wherein the control unit performs control to gradually decrease the luminance of the light source from an initial state based on the light source control data determined by the determination unit. A program for controlling a light source for display,
Computer
A storage unit for storing a plurality of types of light source control data for controlling the light source, luminance setting data indicating display luminance setting, and display mode data indicating display mode setting;
A determination unit that determines light source control data to be applied from the plurality of types of light source control data based on the brightness setting data and the display mode data;
A program that functions as a control unit that performs control to gradually reduce the luminance of the light source based on the light source control data determined by the determination unit.

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