JP5984899B2 - Display control apparatus and control method thereof - Google Patents

Description

  The present invention relates to a display control apparatus that performs display corresponding to a dark place, a control method therefor, a program, and a computer-readable recording medium.

  It is known that visibility is not impaired even in a dark place by changing the color to be displayed in a dark place to red. Patent Document 1 discloses that an image is displayed only with red light whose specific visibility is greatly reduced when dark adaptation is performed in a dark place.

JP 2006-85011 A

  However, when the red display is performed as described above, the display content itself may not be recognized for a person with color vision abnormality who cannot recognize red.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a display control device that improves the visibility with respect to display even when there is a color vision abnormality or the like incapable of recognizing red when performing red display suitable for dark places or the like And

And brightness changing means for changing the RGB components of the respective brightness of the display items displayed on the display unit, and a detection means for detecting the operation related to the display items of the display unit, the display unit is determined to be in the dark case, red changed from brightness before changing the GB component of the display portion about the item of the display unit as part about the display item is displayed in red so as to decrease by the first bright Doma display If the first operation related to the display item of the display unit is detected by the detection means during the first period during the red display , the brightness changing means is controlled to leave the display, before SL when the by said detecting means into a first period a first operation has elapsed the first period without being detected, had at least G component or the B component And having a control means for controlling the brightness change unit as Re Increase one with the higher than first lightness second light Doma.

  According to the present invention, when a red display suitable for a dark place or the like is performed, the visibility with respect to the display can be improved even if there is a color vision abnormality or the like.

1 is an external view of a digital camera as an example of an apparatus to which the configuration of an embodiment of the present invention can be applied. 1 is a block diagram showing a configuration example of a digital camera as an example of an apparatus to which the configuration of an embodiment of the present invention can be applied. The flowchart which shows the process regarding the dark place corresponding | compatible display in this embodiment. The figure which shows an example of the display of the digital camera in this embodiment The figure which shows the brightness | luminance of the display of the digital camera in this embodiment

  Preferred embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows an external view of a digital camera 100 as an example of a display control apparatus. The display unit 28 is a display unit that displays images and various types of information. The shutter button 61 is an operation unit for issuing a shooting instruction. The mode switch 60 is an operation unit for switching various modes. The connector 112 is a connector for connecting to the digital camera 100 and a connection cable 111 for connecting to a PC or a printer, for example. The operation unit 70 is an operation unit including operation members such as various switches, buttons, and a touch panel for receiving various operations from the user. The controller wheel 73 is a rotatable operation member included in the operation unit 70. The power switch 72 is a push button for switching between power on and power off. The recording medium 200 is a recording medium such as a memory card or a hard disk. The recording medium slot 201 is a slot for storing the recording medium 200. The recording medium 200 stored in the recording medium slot 201 can communicate with the digital camera 100 and can be recorded and reproduced. A lid 202 is a lid of the recording medium slot 201. In the figure, a state in which the lid 202 is opened and a part of the recording medium 200 is taken out from the recording medium slot 201 and exposed is shown.

  FIG. 2 is a block diagram illustrating a configuration example of the digital camera 100 according to the present embodiment.

  In FIG. 2, a photographing lens 103 is a lens group including a zoom lens and a focus lens. The shutter 101 is a shutter having an aperture function. The imaging unit 22 is an imaging device configured with a CCD, a CMOS device, or the like that converts an optical image into an electrical signal. The A / D converter 23 converts an analog signal into a digital signal. The A / D converter 23 is used to convert an analog signal output from the imaging unit 22 into a digital signal. The barrier 102 covers the imaging system including the imaging lens 103 of the digital camera 100, thereby preventing the imaging system including the imaging lens 103, the shutter 101, and the imaging unit 22 from becoming dirty or damaged.

  The nonvolatile memory 56 is a memory as an electrically erasable / recordable recording medium, and for example, an EEPROM or the like is used. The nonvolatile memory 56 stores constants, programs, and the like for operating the system control unit 50. Here, the program is a computer program for executing various flowcharts described later in the present embodiment.

  The system control unit 50 controls the entire digital camera 100. By executing the program recorded in the non-volatile memory 56 described above, each process of the present embodiment to be described later is realized. A RAM is used as the system memory 52. In the system memory 52, constants and variables for operation of the system control unit 50, programs read from the nonvolatile memory 56, and the like are expanded. The system control unit 50 also performs display control by controlling the memory 32, the D / A converter 13, the display unit 28, and the like.

  The memory 32 also serves as an image display memory (video memory). The D / A converter 13 converts the image display data stored in the memory 32 into an analog signal and supplies the analog signal to the display unit 28. Thus, the display image data written in the memory 32 is displayed on the display unit 28 via the D / A converter 13. The display unit 28 performs display according to the analog signal from the D / A converter 13 on a display such as an LCD. A digital signal once A / D converted by the A / D converter 23 and stored in the memory 32 is converted into an analog signal by the D / A converter 13 and sequentially transferred to the display unit 28 for display as an electronic viewfinder. It functions and can perform live view display (live view display). Similarly, the display unit 28 can display a menu screen (a screen for performing settings relating to shooting and digital camera 100) in addition to an image. As an example of items that can be set on the menu screen, ISO setting and time setting can be performed.

  The image processing unit 24 performs resizing processing such as predetermined pixel interpolation and reduction and color conversion processing on the data from the A / D converter 23 or the data from the memory control unit 15. The image processing unit 24 performs predetermined calculation processing using the captured image data, and the system control unit 50 performs exposure control and distance measurement control based on the obtained calculation result. Thereby, AF (autofocus) processing, AE (automatic exposure) processing, and EF (flash pre-emission) processing of the TTL (through-the-lens) method are performed. The image processing unit 24 further performs predetermined calculation processing using the captured image data, and also performs TTL AWB (auto white balance) processing based on the obtained calculation result.

  Output data from the A / D converter 23 is directly written into the memory 32 via the image processing unit 24 and the memory control unit 15 or via the memory control unit 15. The memory 32 stores image data obtained by the imaging unit 22 and converted into digital data by the A / D converter 23 and image data to be displayed on the display unit 28. The memory 32 has a storage capacity sufficient to store a predetermined number of still images, a moving image and sound for a predetermined time.

  Further, the display control unit 54 changes the brightness of each color of R (red), G (green), and B (blue) (changes the brightness) and displays the images and display items displayed on the display unit 28 in various colors. Express. The brightness of each color can be indicated in 256 levels from 0 to 255. When (R = 0, G = 0, B = 0), it is displayed as black, and when (R = 255, G = 255, B = 255), it is displayed as white. (R = 255, G = 0, B = 0) is red, (R = 0, G = 255, B = 0) is green, (R = 0, G = 0, B = 255) is blue Is displayed. In addition, the display control unit 54 can change the display brightness of the display unit 28. The display luminance can be changed by adjusting a luminance adjusting device such as a backlight. In this embodiment, the display luminance can be adjusted between about 0 cd / m2 and 300 cd / m2.

  The timer 53 is a time measuring unit that measures the time used for various controls and the time of a built-in clock.

  The mode switch 60, the shutter button 61, and the operation unit 70 are operation means for inputting various operation instructions to the system control unit 50.

  The illuminance measurement unit 90 is an illuminance sensor that measures the illuminance around the environment where the digital camera 100 is located.

  The mode switch 60 switches the operation mode of the system control unit 50 to any one of a still image recording mode, a moving image shooting mode, a reproduction mode, and the like. Modes included in the still image recording mode include an auto shooting mode, an auto scene discrimination mode, a manual mode, various scene modes for shooting settings for each shooting scene, a program AE mode, a custom mode, and the like. In addition, the shooting mode includes a mode used in a dark place such as a night scene shooting mode and an astronomical shooting mode. The mode changeover switch 60 can directly switch to one of these modes included in the menu button. Or after switching to a menu button once with the mode switch 60, you may make it switch to either of these modes contained in a menu button using another operation member. Similarly, the moving image shooting mode may include a plurality of modes. The first shutter switch 62 is turned on when the shutter button 61 provided in the digital camera 100 is being operated, so-called half-press (shooting preparation instruction), and generates a first shutter switch signal SW1. In response to the first shutter switch signal SW1, operations such as AF (autofocus) processing, AE (automatic exposure) processing, AWB (auto white balance) processing, and EF (flash pre-emission) processing are started.

  The second shutter switch 64 is turned ON when the operation of the shutter button 61 is completed, that is, when it is fully pressed (shooting instruction), and generates a second shutter switch signal SW2. In response to the second shutter switch signal SW2, the system control unit 50 starts a series of shooting processing operations from reading a signal from the imaging unit 22 to writing image data on the recording medium 200.

  Each operation member of the operation unit 70 is appropriately assigned a function for each scene by selecting and operating various function icons displayed on the display unit 28, and functions as various function buttons. Examples of the function buttons include an end button, a return button, an image advance button, a jump button, a narrowing button, and an attribute change button. For example, when a menu button is pressed, various setting menu screens are displayed on the display unit 28. The user can make various settings intuitively using the menu screen displayed on the display unit 28, and the four-way button and the SET button.

  The power control unit 80 includes a battery detection circuit, a DC-DC converter, a switch circuit that switches a block to be energized, and the like, and detects whether or not a battery is installed, the type of battery, and the remaining battery level. Further, the power control unit 80 controls the DC-DC converter based on the detection result and an instruction from the system control unit 50, and supplies a necessary voltage to each unit including the recording medium 200 for a necessary period.

  The power supply unit 30 includes a primary battery such as an alkaline battery or a lithium battery, a secondary battery such as a NiCd battery, a NiMH battery, or a Li battery, an AC adapter, or the like. The recording medium I / F 18 is an interface with the recording medium 200 such as a memory card or a hard disk. The recording medium 200 is a recording medium such as a memory card for recording a captured image, and includes a semiconductor memory, an optical disk, a magnetic disk, or the like.

  Next, a flow related to the dark place display in FIG. 3 will be described with reference to FIGS. FIG. 4 shows an example of the display when the dark place corresponding display in the present embodiment is performed, and FIG. 5 shows an example of the change in the luminance of the display unit for each time in the present embodiment. The dark location display flow of FIG. 3 starts when the digital camera 100 is turned on and display on the display unit 28 and the luminance of the color being displayed can be changed. This process is realized by developing a program recorded in the nonvolatile memory 56 in the system memory 52 and executing it by the system control unit 50.

  In S301, the system control unit 50 displays the characters 401 to 403 that are display items in the colors recorded in the memory 32 of the display unit 28. The character 401 shown in FIG. 4A is red (R = 255, G = 0, B = 0), the character 402 is green (R = 0, G = 255, B = 0), and the character 403 is blue (R = 0, G = 0, B = 255), and is recorded in the memory 32. This is the normal brightness display (displaying before red display). FIGS. 5A and 5B show the luminance of the display unit 28 that displays the characters 401 to 403 in FIG. 4A, and each character is displayed with a luminance of 250 cd / m2 indicated by P1. . This is the normal luminance. A line C1 shown in FIG. 5A indicates the luminance of the display according to the elapsed time when it is determined in S307 and S308 that there is no abnormality in color vision. A line C2 shown in FIG. 5B indicates the display luminance according to the elapsed time when it is determined in S307 and S308 that the color vision is abnormal.

  In S <b> 302, the system control unit 50 detects the brightness around the digital camera 100 using the illuminance measurement unit 90. The detection of brightness may be always performed, or may be performed at predetermined time intervals of 2 seconds or 5 seconds.

  In S303, the system control unit 50 determines whether or not the detected brightness is less than 100 lux. If it is determined that it is less than 100 lux, the process proceeds to S305, and if not, the process proceeds to S304.

  In S304, the system control unit 50 increases or decreases the luminance of the display unit 28 according to the measured brightness (P2a) as indicated by P2 in FIG. 5 (P2b). Thus, visibility is improved by changing the luminance of the display unit 28 in accordance with the illuminance around the digital camera 100 (display unit 28).

  In S305, the system control unit 50 performs dark place display (red display). The dark place display is a display that enables the user to recognize an image or a display icon displayed on the display unit 28 without interfering with dark adaptation even when the user is not dark adapting. In the present embodiment, red display is performed so that display items can be recognized only in red. Cells that function in animal vision are mainly rod cells that function in bright places and not in dark places, and cone cells that function in dark places. In dark places, the sensitivity of rod cells is 625 nm or more (red). Almost zero. In addition, the synthesis of the photoreceptor rhodopsin in the rod cells improves the visibility even in the dark. However, when the luminance is high, rhodopsin is decomposed and consequently dark adaptation is hindered. Therefore, even if the color having a wavelength of 625 nm or more is displayed in a state where the luminance is increased and the visibility is maintained, dark adaptation is not hindered. FIG. 4B shows a display example in the case of a dark place display, in which the character 404 is changed from the character 401, the character 405 is changed from the character 402, and the character 406 is changed from the character 403 so that the RGB component is changed. Yes (the brightness of the GB component is made smaller than before the red display change). However, since the character 401 is originally displayed with only the R component, the brightness of the RGB component is not changed. Characters 404 to 406 are all displayed in a color of (R = 255, G = 0, B = 0) and with a luminance of 250 cd / m2 shown in P3 of FIG. The red display may be displayed again after the display is replaced with red so that the user can recognize the portion indicating characters, items and images, or a display image for dark place display may be recorded in the memory 32. good. Generally, when other than the R component is displayed at a luminance higher than 3.4 cd / m 2, rhodopsin decomposition exceeds the synthesis speed of rhodopsin and inhibits dark adaptation, so the brightness of the G and B components other than the R component is lowered. This prevents colors other than red from being displayed with high brightness. For the pixels and the region 413 where the characters 404 to 406 of the display unit 28 are not displayed, all the RGB components are set to values such as 0 or 3.0 cd / m 2 (3.4 cd / m 2 or less that does not inhibit dark adaptation), for example. That is why it is displayed in black. Therefore, the user can recognize the display contents of the display unit 28 by displaying red on the black background.

  In S306, the system control unit 50 starts measuring the dark adaptation time Tα. S306 is a time point when Tα = 0 on the time axis of FIG.

  In S307, the system control unit 50 determines whether the dark adaptation time started from the latest S306 has reached Tα = 6 seconds. If it is determined that 6 seconds have elapsed, the process proceeds to S317, and if not, the process proceeds to S308.

  In S308, the system control unit 50 determines whether or not there has been an operation related to display. If it is determined that there is an operation, the process proceeds to S309, and if not, the process returns to S307. If there is an operation related to display during the red display, the user can see the red display as shown in FIG. 4B, and even if the dark place display by the red display is continued, the user operability is not affected. Assuming that the red display in S309 to S312 is determined to be visible, the flow proceeds. The display-related operations include display items such as an operation for selecting one of the characters 404 to 406 by rotating the controller wheel 73 in FIG. 4B and a menu screen displayed by the operation of the mode switch 60. The operation to change. At this time, red is displayed even when a different screen is displayed. This is because the display on the display unit 28 is visible, and the user who is operating the digital camera 100 when the user performs an operation related to the displayed image or an operation for switching from the displayed image to another image. This is because the red display is considered to be visible. If there is no operation related to display for 6 seconds, it is determined that the red display after S317 is not visible because the user who is operating does not see the red display (assuming there is an abnormality in color vision). Go to the case flow.

  In S309, the system control unit 50 determines whether or not the dark adaptation time started from the latest S306 is Tα = 30 minutes. If it is determined that 30 minutes have elapsed, the process proceeds to S310, and if not, the process proceeds to S311. When 30 minutes or more have passed since the digital camera 100 was placed in an environment of less than 100 lux, it is considered that the user who has the digital camera 100 is also in a dark place of less than 100 lux for 30 minutes or more. In addition, when the user is in a dark place of 30 minutes or more and less than 100 lux, it is considered that there is visibility even in a dark environment because of dark adaptation. When it is determined that there is no abnormality in color vision as indicated by the line C1 in FIG. 5A, the luminance remains 250 cd / m2 until Tα = 30 minutes unless it is determined that the light is bright. The brightness of the displayed color is red (R = 255, G = 0, B = 0).

  In S310, the system control unit 50 brings the original color relationship (FIG. 4A) closer to the original color relationship from the red display state (FIG. 4B). That is, the character 405 originally displayed in green is increased in the brightness of the G component (R = 255, G = 100, B = 0), and the character 406 originally displayed in blue is the B component of the B component. Raise the brightness (R = 255, G = 0, B = 100). Since the character 404 was originally displayed in red, it remains here (R = 255, G = 0, B = 0). The luminance for displaying each character remains at 250 cd / m 2 as indicated by P4 in FIG. In S310, since it is considered that dark adaptation has been completed, colors other than red for the user can be obtained by bringing each character closer to the original display color (color displayed on the display unit 28 before displaying the dark place). The display can be recognized and the visibility is improved. However, the process of S310 is not necessarily performed, and the red display may be left.

  In S311, the system control unit 50 detects the brightness around the digital camera 100 by the illuminance measurement unit 90, as in S302.

  In S312, the system control unit 50 determines whether the brightness measured in the latest S311 is 100 lux or more. If it is determined that it is 100 lux or more, the process proceeds to S313, and if not, the process returns to S309. Even when the dark place display is performed, it is determined whether or not the user has moved to the light place by performing the processes of S311 to S312. If it is determined that the digital camera 100 and the user have moved to the light place, Stop measuring Tα.

  In S313, the system control unit 50 starts measuring the light adaptation time Tβ.

  In S314, the system control unit 50 determines whether or not the light adaptation time started from S313 is Tβ = 40 seconds. If it is determined that 40 seconds have elapsed, the process returns to S301, and if not, the process proceeds to S315. When moving from a dark place to a light place, the vision is temporarily lost as in the case of moving from a light place to a dark place, but light adaptation takes less time than dark adaptation and takes 40 seconds to 1 minute. It will be visible in a bright environment with light adaptation. Therefore, since it is considered that there is visibility when 40 seconds have passed since coming to the light place, the display is changed from the dark place display to the light place display in S301 when 40 seconds have passed.

  In S315, the system control unit 50 detects the brightness around the digital camera 100 by the illuminance measurement unit 90, as in S302.

  In S316, the system control unit 50 determines whether or not the brightness measured in the latest S315 is 100 lux or more. If it is determined that it is 100 lux or more, the process returns to S314, and if not, the process returns to S305.

  In S317, the system control unit 50 displays the characters 407 to 409 in red (R = 255, G = 0, B = 0) from the display shown in FIG. 4C (R = 255, G = 0). = 50, B = 50). In the processing of S317 to S325, display is performed so that the display colors of the three characters are the same. Further, the luminance is lowered from 250 cd / m 2 to 100 cd / m 2 as indicated by P5 in FIG. In other words, the characters 404 to 406 displayed in red in FIG. 4B are changed when the display of the characters 407 to 409 shown in FIG. 4C is changed (changed from red to orange). Is displayed. Note that S317 is processing when it is determined that the user does not see the red display, but even if the user who can see the red display does not perform an operation in S307 for 6 seconds (depending on the operation state), the processing of S317 is performed. Move. In general, when the GB component is displayed with a bright luminance of 3.4 cd / m 2 or more, the decomposition of rhodopsin exceeds the synthesis speed and the dark adaptation is hindered. Therefore, even in S317, the luminance is 250 cd / m 2. To 100 cd / m2. For a user who can see a red display (a user who has no abnormal color vision), displaying the GB component at 100 cd / m 2 can be a factor that hinders dark adaptation. However, if the brightness is lowered to about 3 cd / m 2 that does not prevent dark adaptation, the visibility is reduced for a user who does not see a red display, so in S317, the display is performed with a brightness of 100 cd / m 2. In addition, for users who do not have abnormal color vision, decreasing the brightness of the R component and increasing the brightness of only the GB component reduces visibility and prevents dark adaptation, so in S317, without reducing the brightness of the R component, Only increase the brightness of the GB component.

  In S318, the system control unit 50 changes the brightness of the RGB components every second (R = 0, G = 1, B = 1) and decreases the luminance by 1 cd / m 2 per second. Thus, by gradually increasing the brightness of the GB component, even a user who has an abnormal color vision (it is difficult to recognize red) can recognize the display by gradually increasing the brightness of the GB component. Become. Further, since the brightness of the GB component is increased step by step, if the luminance is continuously displayed at 100 cd / m 2, the GB component with the increased brightness is displayed at 100 cd / m 2 for a user who has no abnormal color vision. Display is difficult to adapt to darkness. Therefore, the luminance is gradually lowered as time passes.

  In S319, the system control unit 50 determines whether or not the luminance gradually decreased in S318 has become 20 cd / m 2. If it is determined that the luminance is 20 cd / m 2 (Tα = 86 seconds, 80 seconds have passed since S317), the process proceeds to S320, and if not, the process proceeds to S322. FIG. 4D shows a display example of the display unit 28 (in P6 of FIG. 5B) when it is determined in S319 that the luminance is 20 cd / m2, and is displayed in orange in S317. The characters 407 to 409 are displayed in a color closer to white. At this time, the characters 410 to 412 in FIG. 4D are all displayed with the lightness (R = 255, G = 130, B = 130). Therefore, since the brightness of the GB component gradually increases in steps S317 to S319, the user who cannot see the red display can gradually recognize the display on the display unit 28. Moreover, it becomes a display with high visibility for the user who cannot see a red display. In the present embodiment, the GB component is increased and the luminance is decreased at the same time. If the luminance is too low even in a dark place, the visibility is lowered, so that the luminance does not decrease below 20 cd / m 2 and the brightness of the GB component is increased. Stop raising. However, the luminance at which the visibility is reduced may not be 20 cd / m 2, or the degree of displaying only the luminance may be stopped and the GB component may be increased until a user operation is performed. However, also in this case, when the RGB component becomes (R = 255, G = 255, B = 255), the brightness of the GB component is not increased any more.

  In S320, the system control unit 50 detects the brightness around the digital camera 100 by the illuminance measurement unit 90, as in S302.

  In S321, the system control unit 50 determines whether or not the brightness measured in the latest S320 is 100 lux or more. If it is determined that it is 100 lux or more, the process proceeds to S313, and if not, the process returns to S320. Even when the dark place is being displayed, if it is determined that it is a bright place from the brightness measured in S320 or S324, the display is not necessarily performed with the luminance shown in FIG.

  In S322, the system control unit 50 determines whether or not there has been an operation related to a display item, as in S308. If it is determined that there is an operation, the process proceeds to S323, and if not, the process proceeds to S324.

  In S323, the system control unit 50 stops changing the brightness and the brightness of the RGB components, and performs display with the brightness and the brightness of the RGB components being displayed. As shown in P7 of FIG. 5B, for example, when an operation from the user is detected after Tα = 6 + α (<86 seconds), the luminance is (100−α) cd / m2, and the RGB component is (R = 255, G = 50−α, B = 50−α). If the operation from the user is performed, it can be determined that the user can recognize the display content if the user has RGB brightness during display. Therefore, when an operation from the user is detected, the brightness of the GB component is stopped from increasing there. When there is a user operation in S323, the display is displayed with the luminance as indicated by the line C3 shown in FIG. In addition, if the user increases the GB component even though the display content is recognized, dark adaptation is hindered. Therefore, the increase in the brightness of the GB component is stopped according to the operation from the user. Therefore, dark adaptation is not prevented more than necessary while maintaining visibility. At this time, only one of the changes may be stopped and the other may continue to be changed. That is, for example, although the increase in the brightness of the GB component is stopped, the brightness may be increased to a brightness corresponding to the brightness, or the brightness may be increased by decreasing the brightness again.

  In S324, the system control unit 50 detects the brightness around the digital camera 100 by the illuminance measurement unit 90, as in S302.

  In S325, the system control unit 50 determines whether or not the brightness measured in the latest S324 is 100 lux or more. If it is determined that the number is 100 lux or more, the process proceeds to S313, and if not, the process returns to S318.

  As described above, according to the embodiment described above, when there is no abnormality in color vision in a dark place, dark adaptation is not hindered, and a display with visibility can be displayed. In addition, it is possible to display with visibility while reducing the inhibition of dark adaptation. In the present embodiment, whether or not the red display is recognized is determined based on whether or not the user performs an operation on the red display in S308. Furthermore, even when it is determined that the user does not see the red display, the brightness of the GB component that allows the user to recognize the display content by gradually increasing the brightness of the GB component is determined based on the presence or absence of an operation. Therefore, the obstruction to dark adaptation can be reduced for any user, and the display can be made visible to each user.

  The above-described flow is performed when a dark place mode (shooting in a dark place) such as night scene shooting mode, astronomical shooting mode, ISO high sensitivity setting, or shooting setting is set, and shooting in a bright place. You may not make it perform in the bright place mode which performs (light place photography). Further, since there is a high possibility of shooting in a dark place for a long time at night, the above-described flow is performed only when the time measured by the timer 53 indicates a certain time zone such as only at night. You may do it.

  Note that the luminance described in the present embodiment is merely an example, and varies depending on the user and surrounding luminance. In a bright place, display is performed with a luminance that the user feels most comfortable (high visibility) at a brightness determined to be a bright place (a luminance of 250 cd / m 2 in the present embodiment). In the present embodiment, in S317, the luminance is set to 100 cd / m2 in order to reduce the dark adaptation hindrance for the user who is not abnormal in color vision and to make the GB component visible to the user who is abnormal in color vision. However, it may not be 100 cd / m2.

  In addition, although it has been described that the time until dark adaptation is 30 minutes and the time until light adaptation is 40 seconds, it is not limited to this, and dark adaptation may take one hour or more depending on the user or the environment. Since dark adaptation may occur in a shorter time than minutes, Tα may be 1 hour or 20 minutes. Also, the bright adaptation may take 1 minute or more, or the bright adaptation may take about 20 seconds, so Tβ may be 1 minute or 20 seconds.

  The above-described values are examples, and the numerical values are not limited.

  In addition, the boundary between the bright place and the dark place has been described as 100 lux. However, the present invention is not limited to this, and if the brightness becomes lower than 80 lux, 50 lux, or 120 lux, the dark place may be used for a predetermined time. It may be a dark place in response to a change in brightness exceeding a predetermined value.

  Note that the display control apparatus may be controlled by a single piece of hardware, or the entire apparatus may be controlled by a plurality of pieces of hardware sharing the processing.

  Moreover, in the said Example, although the state (operation state) that there was no predetermined operation is detected, lightness may be changed conversely by detecting the state where there was predetermined operation. That is, as described above, the brightness may be changed so that at least one of the G component and the B component is increased to a second brightness higher than the predetermined first brightness.

  Although the present invention has been described in detail based on the preferred embodiments thereof, the present invention is not limited to these specific embodiments, and various forms without departing from the gist of the present invention are also included in the present invention. included. Furthermore, each embodiment mentioned above shows only one embodiment of this invention, and it is also possible to combine each embodiment suitably.

  In the above-described embodiment, the case where the present invention is applied to the digital camera 100 has been described as an example. However, the present invention is not limited to this example, and may be a display control device that can change luminance and brightness of RGB components. If applicable. That is, the present invention can be applied to a mobile phone terminal, a portable image viewer, a printer device including a viewfinder, a digital photo frame, a music player, a game machine, an electronic book reader, and the like.

(Other embodiments)
The present invention is also realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various recording media, and a computer (or CPU, MPU, or the like) of the system or apparatus reads the program code. It is a process to be executed. In this case, the program and the recording medium storing the program constitute the present invention.

Claims (18)

Brightness changing means for changing the brightness of each RGB component of the display item displayed on the display unit;
Detection means for detecting the operation related to the display items of the display unit,
When it is determined that the display unit is in a dark place, the GB component of the display item portion of the display unit is changed from the lightness before change to the first value so that the display item portion is displayed in red. controlling the brightness change unit to the red display was changed so as to decrease the bright Doma,
When the first operation related to the display item of the display unit is detected by the detection means in the first period during the red display, the red display is left
If the previous SL the first operation by said detection means in the first period of time is the first time period without being detected, than said first lightness at least either one of the G component or the B component display control apparatus characterized by a control means for controlling the brightness change unit so as to increase at a higher second light Doma.   The display control apparatus according to claim 1, wherein the red display is a display that displays the display item in red and a background in black.   The control means reduces at least one of the G component and the B component of the portion related to the display item from the lightness during display to the first lightness, and further raises the R component from the lightness during display to increase the red color. The display control apparatus according to claim 1, wherein the brightness changing unit is controlled so as to perform display. It further has illuminance measuring means for measuring illuminance,
4. The display control apparatus according to claim 1, wherein the control unit performs the red display when the illuminance measurement unit determines that the brightness is lower than a predetermined brightness. 5. Further comprising luminance changing means for changing the luminance in the display unit;
The control means controls the brightness changing means to display the red display and to display a portion related to the display item with a first brightness,
The control means lowers the portion related to the display item to be lower than the first luminance in response to the elapse of the first period without performing the first operation while performing the red display. 5. The display control apparatus according to claim 1, wherein the brightness changing unit is controlled to display at the second brightness. 6. The control means performs the second brightness stepwise according to an elapsed time from displaying at the second brightness until the detection means detects a second operation related to the display item of the display unit. The display control apparatus according to claim 5, wherein the brightness changing unit is controlled so as to reduce the brightness. The control means includes at least a portion related to the display item in accordance with an elapsed time from the display at the second brightness until the detection means detects a second operation related to the display item of the display unit. The display control apparatus according to claim 5 or 6, wherein the brightness changing unit is controlled so that the brightness of either the G component or the B component is gradually increased from the second brightness.   When there is an operation relating to a display item being displayed after the portion relating to the display item is displayed at the second luminance, the control means is at least one of the G component and the B component of the portion relating to the display item. 8. The display control apparatus according to claim 6, wherein control is performed so as to stop at least one of raising one brightness or lowering brightness.   The control means controls to stop lowering the luminance in response to a decrease in luminance at which a portion related to the display item is displayed from the second luminance to the third luminance. The display control apparatus according to claim 6. The display control apparatus according to claim 5, wherein the first luminance is 100 cd / m 2 or more. The display control apparatus according to claim 1, wherein the operation state relating to the display item is an operation state of selecting a display item being displayed or changing a display item.   When the illuminance measuring means determines that the control means is brighter than the predetermined brightness, the control means changes the GB component from the second brightness so that the display before the red display is performed from the red display. The display control apparatus according to claim 4, wherein the brightness changing unit is controlled to increase the brightness to a higher brightness. The display control device is a display control device used in an imaging device,
The imaging apparatus has mode switching means for switching to any one of a plurality of photographing modes including a dark place mode capable of setting suitable for dark place photographing and a bright place mode capable of setting suitable for bright place photographing. And
When the mode switching unit switches to the dark place mode and the control unit determines that the display unit is in a dark place, the control unit displays the portion related to the display item in red. The brightness changing means is controlled to change the GB component of the part related to the display item of the display unit so as to lower the brightness from the brightness before the change to the first brightness and to display red.
When the first operation related to the display item of the display unit is detected by the detection means in the first period during the red display, the red display is left
When the first period has passed without detecting the first operation by the detecting means in the first period, at least one of the G component and the B component is higher than the first brightness. The display control apparatus according to claim 1 , wherein the brightness changing unit is controlled to increase to a second brightness . It further has a timing means,
When the time measured by the time measuring means is within a predetermined time zone, the control means displays the portion related to the display item in red when it is determined that the display section is in a dark place. Controlling the brightness changing means to display the red color by changing the GB component of the display unit related to the display item so as to lower from the brightness before the change to the first brightness,
When the first operation related to the display item of the display unit is detected by the detection means in the first period during the red display, the red display is left
When the first period has passed without detecting the first operation by the detecting means in the first period, at least one of the G component and the B component is higher than the first brightness. The display control apparatus according to claim 1 , wherein the brightness changing unit is controlled to increase to a second brightness .   The display control apparatus according to claim 1, wherein the display unit is a touch panel. A brightness change step for changing the brightness of each RGB component of the display item displayed on the display unit;
A detecting step of detecting an operation related to the display items of the display unit,
When it is determined that the display unit is in a dark place, the GB component of the display item portion of the display unit is changed from the lightness before change to the first value so that the display item portion is displayed in red. controlling the brightness changing step to the red display was changed so as to decrease the bright Doma,
If a first operation related to the display item of the display unit is detected in the detection step during the first period during the red display, the red display is left,
When said first operation before Symbol said detecting step in a first period of time is the first time period without being detected, than said first lightness at least either one of the G component or the B component control method of the display control apparatus characterized by a control step of controlling so as to raise a high second light Doma.   The program for functioning a computer as each means of the display control apparatus as described in any one of Claims 1 thru | or 15.   A computer-readable recording medium storing a program for causing a computer to function as each unit of the display control device according to any one of claims 1 to 15.

Images