Drive control device, drive control method, information processing system, and information processing method for information processing system

Abstract

The present disclosure relates to a drive control device, a drive control method, an information processing system, and an information processing method for an information processing system which make it possible to suppress the occurrence of banding that occurs in a direct view light emitting diode (LED) display during re-imaging. With regard to achieving low luminance of an LED, light emission is controlled by means of pseudo gradation for gradation control, by fixing to 0 a lower-order bit for performing control employing thinned light emission, thereby stopping thinned light-emission control, and by setting a plurality of LEDs as a unit and controlling the number of LEDs that emit light and the positions of the LEDs that emit light. The present invention is applicable to passive-drive type LED display devices.

Description

[Technical Field]

[0001] The present disclosure relates to a drive control device, a drive control method, an information processing system, and an information processing method for an information processing system, and in particular to a drive control device, a drive control method, an information processing system, and an information processing method for an information processing system that are capable of suppressing banding that occurs when re-capturing an image in a direct-view LED (Light Emitting Diode) display. [Background technology]

[0002] In recent years, the market for direct-view displays using LEDs (Light Emitting Diodes) has been expanding.

[0003] Here, a technology has been proposed for LED displays using a general-purpose driver IC (Integrated Circuit), in which the gradation is controlled by repeatedly turning the light on and off over time at a speed that is not visible to the human eye, and low gradations are expressed by thinning out the light emitted (see Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2020-183998 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, among direct-view displays, large tiling-type panels are used in the backstage areas of television programs and virtual studios for filming movies, and there are increasing cases where images displayed on the display are photographed, or so-called re-shoots are performed.

[0006] However, it is known that banding occurs when an image displayed on a passive matrix driven LED display, which accounts for the majority of the market, is captured by an imaging device such as a camera.

[0007] This is because when the technology of Patent Document 1 is applied, low luminance tones are expressed by changing the light emission duty.

[0008] In other words, because low brightness gradations are expressed on the display by controlling the light-emitting duty, there may be cases where, on a specific line of the image sensor that captures the display, the period during which the image sensor cannot expose, such as the data writing period, overlaps with the light-emitting period of the display.

[0009] In this case, the exposure time for that particular line is shorter than that of the other lines, so it is imaged darker and appears darker than the other lines, which is perceived as stripes of light and dark, or banding.

[0010] The present disclosure has been made in view of such circumstances, and is particularly directed to making it possible to suppress the occurrence of banding that occurs when re-capturing an image on a direct-view LED (Light Emitting Diode) display. [Means for solving the problem]

[0011] A drive control device according to a first aspect of the present disclosure includes a light emission control unit that controls the light emission of LEDs that constitute an LED (Light Emitting Diode) array, and the light emission control unit is a drive control device that expresses a portion of the gradation of brightness of the LEDs by controlling the light emission of a plurality of the LEDs as a unit.

[0012] A drive control method according to a first aspect of the present disclosure includes a step of controlling the light emission of LEDs constituting an LED (Light Emitting Diode) array, and the processing of the step is a drive control method that expresses a portion of the gradation of brightness of the LEDs by controlling the light emission of a plurality of the LEDs as a unit.

[0013] In a first aspect of the present disclosure, light emission of LEDs constituting an LED (Light Emitting Diode) array is controlled, and some gradations of brightness of the LEDs are expressed by light emission control in units of a plurality of the LEDs.

[0014] An information processing system according to a second aspect of the present disclosure includes a display section consisting of a display unit having LEDs (Light Emitting Diodes) arranged in an array and a drive control device that controls the driving of the LEDs, and a distribution section that receives input of a video signal, performs predetermined signal processing on the video signal, and distributes it to the display unit, wherein the drive control device includes a light emission control section that controls the light emission of the LEDs, and the light emission control section is an information processing system that expresses some of the gradations of brightness of the LEDs by light emission control in units of a plurality of the LEDs.

[0015] An information processing method for an information processing system according to a second aspect of the present disclosure is an information processing method for an information processing system including a display section consisting of a display unit having LEDs (Light Emitting Diodes) arranged in an array and a drive control device that controls the drive of the LEDs, and a distribution section that receives input of a video signal, performs predetermined signal processing on the video signal, and distributes it to the display unit, wherein the drive control device includes a step of controlling the light emission of the LEDs, and the processing of the step expresses some of the gradations in brightness of the LEDs by controlling the light emission in units of a plurality of the LEDs.

[0016] In a second aspect of the present disclosure, there is provided a display section consisting of a display unit having LEDs (Light Emitting Diodes) arranged in an array and a drive control device that controls the driving of the LEDs, and a distribution section that receives input of a video signal, performs predetermined signal processing on the video signal, and distributes it to the display unit, wherein the drive control device controls the light emission of the LEDs, and some gradations of brightness of the LEDs are expressed by light emission control in units of multiple LEDs. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a diagram illustrating an example configuration of a display system according to the present disclosure. [Figure 2] 2 is a diagram illustrating an example of the configuration of a video wall controller and a display unit in FIG. 1. FIG. [Figure 3] FIG. 1 is a diagram illustrating an example of the configuration of an LED array. [Figure 4] 10A and 10B are diagrams illustrating gradation expression using thinned-out light emission. [Figure 5] 10A and 10B are diagrams illustrating gradation expression using thinned-out light emission. [Figure 6] 10A and 10B are diagrams illustrating gradation expression using thinned-out light emission. [Figure 7] FIG. 1 is a diagram illustrating a global shutter and a rolling shutter. [Figure 8] FIG. 10 is a diagram illustrating the cause of banding. [Figure 9] FIG. 1 is a diagram illustrating tone representation according to the present disclosure. [Figure 10] FIG. 10 is a diagram illustrating pseudo-gradation. [Figure 11] 10 is a flowchart illustrating a display process. [Figure 12] 10 is a flowchart illustrating a driver control process. [Figure 13] 10 is a flowchart illustrating driver signal processing. DETAILED DESCRIPTION OF THE INVENTION

[0018] Preferred embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. In this specification and drawings, components having substantially the same functional configurations are designated by the same reference numerals, and redundant description will be omitted.

[0019] Hereinafter, embodiments of the present technology will be described in the following order. 1. Display system configuration example 2. Detailed configuration of the video wall controller and display unit 3. LED array configuration example 4. Gradation expression using thinned out light 5. Global shutter and rolling shutter 6. Causes of banding 7. Tonal Expression in This Disclosure 8. Examples of pseudo-tonal 9. Display processing 10. Driver control processing by display unit 11.Video Signal Processing

[0020] <<1. Display system configuration example>> The present disclosure is particularly directed to suppressing the occurrence of banding that occurs when re-capturing an image on a direct-view LED (Light Emitting Diode) display.

[0021] FIG. 1 shows an example of the configuration of a display system to which the technology of the present disclosure is applied.

[0022] The display system 11 in FIG. 1 displays video content on a large display configured by arranging a plurality of display units in a tiled pattern.

[0023] More specifically, the display system 11 includes a PC (personal computer) 30, a video server 31, a video wall controller 32, and a video wall 33.

[0024] The PC (personal computer) 30 is a general-purpose computer that accepts operation inputs from a user and supplies a command to the video wall controller 32 according to the operation content.

[0025] The video server 31 is, for example, a server computer, and supplies video signal data such as video content to the video wall controller 32 .

[0026] The video wall controller 32 operates in response to commands supplied from the PC 30, and distributes data consisting of video content image signals to the display units 51-1 to 51-n that make up the video wall 33 for display.

[0027] When there is no need to distinguish between the display units 51-1 to 51-n, they will simply be referred to as display units 51.

[0028] As shown in the upper right corner of Figure 1, the video wall 33 is made up of display units 51-1 to 51-n, each of which has an array of LED pixels, arranged in a tiled pattern.The images displayed by each display unit 51 are combined in a tiled pattern to display a single image across the entire video wall 33.

[0029] The video wall controller 32 performs predetermined signal processing on the data consisting of the video signal of the video content supplied from the video server 31, distributes and supplies the data according to the arrangement of the display units 51-1 to 51-n, controls the individual displays of the display units 51-1 to 51-n, and controls the video wall 33 as a whole to display a single image.

[0030] The video wall controller 32 and the video wall 33 may be integrated into one unit, or may be integrated into one display device (information processing system).

[0031] <<2. Detailed configuration of the video wall controller and display unit>> Next, a detailed configuration example of the video wall controller 32 and the display unit 51 will be described with reference to FIG.

[0032] The video wall controller 32 includes a LAN (Local Area Network) terminal 71, an HDMI (High Definition Multimedia Interface) (registered trademark) terminal 72, a DP (Display Port) terminal 73, a DVI (Digital Visual Interface) terminal 74, a network IF (Interface) 75, an MPU (Micro Processor Unit) 76, a signal input IF 77, a signal processing unit 78, a DRAM (Dynamic Random Access Memory) 79, a signal distribution unit 80, and output IFs 81-1 to 81-n.

[0033] The LAN (Local Area Network) terminal 71 is, for example, a connection terminal for a LAN cable, and is operated by a user to realize communication via LAN with a personal computer (PC) 30, supplying control commands etc. according to the operation content to the video wall controller 32, and supplies the input control commands etc. to the MPU 76 via the network IF 75.

[0034] The LAN terminal 71 may be configured to be physically connected by a wired LAN cable, or may be configured to be connected by a so-called wireless LAN, which is realized by wireless communication.

[0035] The MPU 76 receives an input of a control command supplied from the PC 30 via the LAN terminal 71 and the network IF 75, and supplies a control signal corresponding to the received control command to the signal processing unit 78.

[0036] The HDMI terminal 72, the DP terminal 73, and the DVI terminal 74 are all input terminals for data consisting of video signals, and are connected to, for example, a server computer that functions as a video server 31, and supply data consisting of video signals to a signal processing unit 78 via a signal input IF 77.

[0037] In addition, Figure 2 shows an example in which the video server 31 is connected to the HDMI terminal 72, but the HDMI terminal 72, DP terminal 73, and DVI terminal 74 all have basically the same functions and only differ in standard, so any one of them can be selected and connected as needed.

[0038] Based on the control signal supplied from the MPU 76, the signal processing unit 78 adjusts the color temperature, contrast, brightness, etc. of the data consisting of the video signal supplied via the signal input IF 77, and supplies the adjusted data to the signal distribution unit 80. At this time, the signal processing unit 78 uses the connected DRAM 79 to expand the data consisting of the video signal, as necessary, executes signal processing based on the control signal, and supplies the signal processing result to the signal distribution unit 80.

[0039] The signal distribution unit 80 distributes the data consisting of the signal-processed video signal supplied from the signal processing unit 78, and distributes and transmits the data individually to the display units 51-1 to 51-n via the output IFs 81-1 to 81-n.

[0040] The display unit 51 includes a driver control unit 91 and an LED block 92 .

[0041] The driver control unit 91 supplies data consisting of video signals that control the light emission of the LEDs that make up the LED arrays 122-1 to 122-N to the plurality of LED drivers 121-1 to 121-N that make up the LED block 92.

[0042] More specifically, the driver control unit 91 includes a signal input IF 111, a signal processing unit 112, a DRAM 113, and output IFs 114-1 through 114-N.

[0043] The signal input IF 111 receives input of video signal data supplied from the video wall controller 32 and supplies it to the signal processing unit 112 .

[0044] The signal processing unit 112 corrects the color and brightness for each display unit 51 based on the video signal data supplied from the signal input IF 111, generates data for setting the light emission intensity of each LED constituting the LED arrays 122-1 to 122-N, and distributes and supplies the data to the LED drivers 121-1 to 121-N of the LED block 92 via the output IFs 114-1 to 114-N.

[0045] The LED block 92 includes LED drivers 121-1 to 121-N and LED arrays 122-1 to 122-N.

[0046] The LED drivers 121-1 to 121-N perform PWM (Pulse Width Modulation) control of the light emission of the LEDs arranged in an array that make up the corresponding LED arrays 122-1 to 122-N based on data that sets the light emission intensity of the LEDs 141, which data is composed of a video signal supplied from the driver control unit 91.

[0047] <<3. LED array configuration example>> Next, a configuration example of the LED array 122 will be described with reference to Fig. 3. Fig. 3 shows a configuration example of the LED array 122 in a passive matrix drive type LED drive wiring. Therefore, the light emission of the LEDs 141 of the LED array 122 is controlled by a passive matrix drive method.

[0048] In the LED array 122 of Figure 3, common cathode type LEDs 141 are arranged in an array, and each LED 141 is connected to a Sig line (brightness control wiring) wired vertically and a Scan line (row selection wiring) wired horizontally.

[0049] 3, when the Scan line 1 is set to a predetermined fixed potential and turned ON, a current is supplied to the LED from the Sign line, causing the LED to emit light. Note that the predetermined fixed potential is generally GND=0V potential, but is not limited to this.

[0050] <<4. Gradation Expression Using Thinned Light Emission>> In a passive matrix driving LED display, for example, a 22-bit equivalent gradation is set, and the LED driver 121 expresses this 22-bit equivalent gradation as a 16-bit gradation using thinned-out light emission.

[0051] In this case, as shown in Figure 4, the upper 11 bits on the high-brightness side of the 16 bits are used to express the gradation by setting a pulse width that is the length of one light emission per line (Drive PWM), and the lower 5 bits are further expressed by thinning out the light emission.

[0052] More specifically, in the case of a passive matrix driven LED display, as shown in the upper part of Figure 5, for each frame of light emitted, light is emitted sequentially from top to bottom in the figure, and this process of emitting light for one frame of image is repeated 32 times.

[0053] In the upper part of Figure 5, the arrow pointing to the bottom right indicates the order in which lights are emitted sequentially from the top row to the bottom row in chronological order, and the arrow pointing to the top right indicates switching from the bottom line to the top line for the next light emission.

[0054] That is, on the high-brightness side, if one cycle of the light-emitting period is 120Hz, a maximum of 2048 (=2) LEDs can be displayed in 11 bits for each line during the 120Hz period. 11 The brightness is expressed by the length of the light emission time, which is measured in pulse widths set by the ) clock, and the process of displaying all lines is repeated 32 times. Therefore, the refresh rate is 3840 (= 120 x 32) Hz.

[0055] As shown in the enlarged view of the area enclosed by the dotted line in the upper right corner of Figure 5, the switching time for each line is set, and 5% of the refresh rate is set as the write period for writing the gradation data representing the luminance expressed in 11 bits. Note that in the passive matrix drive system, the write period can be set even during light emission, and can also be made shorter.

[0056] In contrast, in the case of an active matrix drive LED display, as shown in the bottom part of Figure 5, 66% of the 120 Hz, which is one cycle of the light-emitting period, is set as the light-emitting period in which all LEDs (all lines) emit light simultaneously, and the remaining 34% is set as the data writing period, during which the LEDs are in an off state.

[0057] On the other hand, the lower 5 bits of low brightness gradation in passive matrix driven LED displays are controlled differently from the high brightness control described above, and the lower 5 bits are expressed by thinning out the 32 repeated light emissions.

[0058] That is, 32(=2 5 ) of the repeated flashes, 32 flashes are emitted to express the maximum brightness, and 31 flashes are omitted to express the minimum brightness, resulting in only one flash.

[0059] Therefore, when emitting light only once out of 32 times, for example, as shown by the downward arrow with a circle in the lower part of Figure 6, the minimum brightness is expressed by emitting light only once for the 32nd time, from top to bottom, for one line at a time, that is, for 1 / 32 of one cycle of 120 Hz.

[0060] For comparison, the upper part of FIG. 6 shows an example of gradation expression on the high-luminance side of the upper 11 bits, which is repeatedly emitted 32 times.

[0061] Furthermore, in the above, an example of a method for controlling a passive matrix driven LED display has been described in which light emission is controlled sequentially in the vertical direction for each line of LEDs arranged horizontally, but light emission may also be controlled sequentially in the horizontal direction for each line of LEDs arranged vertically.

[0062] <<5. Global Shutter and Rolling Shutter>> Next, the global shutter and the rolling shutter will be described with reference to FIG.

[0063] There are two exposure methods for imaging devices that capture images displayed on an LED display: a global shutter, in which the exposure time and readout time are set at the same time for all pixels, and a rolling shutter, in which the exposure time and readout time are set sequentially for each row.

[0064] More specifically, as shown in the left part of Figure 7, for example, the global shutter sets the exposure time (Exposure Time) at the same timing for pixels on all lines from the readout start timing (Frame Start Triggered) Ts to Line 1 to Line N, and then sets the readout time (Readout Time) at the same timing for pixels on all lines from Line 1 to Line N.

[0065] On the other hand, with a rolling shutter, for example, as shown in the right part of Figure 7, at the readout start timing (Frame Start Triggered) Ts, the exposure time of Line 1 starts, and then, with a delay of a predetermined time Δt, the exposure time of Line 2 starts, and then, with a delay of a further predetermined time Δt, the exposure time of Line 3 starts, ... and finally, with a delay of Δt(N-1), the exposure time of Line N starts.

[0066] Then, the readout time is set when the exposure time for Line 1 ends, after which the readout time for Line 2 is set a predetermined time Δt after the end of the readout time for Line 1, and finally, the readout time for Line N is set Δt(N-1) (Reset Runtime) after the end of the exposure time for Line 1. The readout times are represented by the black portions after the exposure times for each line on the right side of Figure 7.

[0067] As a result, in the rolling shutter, a total readout time of Δt×N is set, but the readout time is set in line units, and the timing is different for adjacent lines, shifted by Δt.

[0068] <<6. Causes of Banding>> For this reason, for example, when considering recapturing an image displayed on an LED display whose light emission is controlled by an active matrix drive system, using an imaging device such as a camera, appropriate imaging becomes possible because the exposure time and readout time can be executed at a predetermined ratio during high-brightness light emission, as shown in the upper left of Figure 8.

[0069] However, when low-intensity light is emitted by thinning out the light, for example, as shown in the lower left of Figure 8, at the lowest brightness, the light emission timing is set to 1 / 32 during one cycle of 120 Hz. Therefore, if the light emission time of a specific line on the LED display overlaps with the readout time for any line on the imaging device, no exposure time will be set for the line that overlaps with the readout time, and only that line will be darker than the adjacent lines.

[0070] As a result, compared to the other lines, the lines for which no exposure time was set appear as black line-like bands in the image, resulting in banding.

[0071] <<7. Tonal Expression in This Disclosure>> Therefore, in the present disclosure, when there is no reshooting and no countermeasures against banding are required, as shown in the upper part of Figure 9, 6 bits of the expression gradation are superimposed on the lower 3 bits of the 16 bits controllable by the driver, and a gradation equivalent to 22 bits is expressed using the 16-bit gradation controllable by the driver by thinning out the light emission.

[0072] Furthermore, if reshooting is required and banding needs to be addressed, the lower 5 bits used for control by thinned light emission are fixed at 0, i.e., control by thinned light emission is stopped. Furthermore, pseudo gradation using a total of 3 bits from the lower 11th bit to 13th bit is used to superimpose and express an expression gradation equivalent to 11 bits, which is a combination of the 5 bits expressed by thinned light emission and the 6 bits of expression gradation.

[0073] Here, the pseudo-gradation is not a gradation expression in units of one LED, but a gradation expression that is expressed by changing the light emission pattern etc. in units of multiple LEDs.

[0074] <<8. Examples of pseudo-tonal tones>> For example, if four adjacent LEDs consisting of 2 x 2 (= number of LEDs in the horizontal direction x number of LEDs in the vertical direction) are used to quadruple the gradation, by controlling the light-emitting area as shown in Figure 10, that is, by controlling the number of LEDs that emit light within a range of multiple LEDs, the brightness can be expressed as 3 / 4, 2 / 4, 1 / 4, and 0 times the maximum brightness of the bottom row, in order from bottom to top.

[0075] However, in this case, if the same LED is illuminated, the resolution will appear to be reduced, so the position of the illuminated LED is changed on a frame-by-frame basis, as shown from the left in the figure as Frame 1, Frame 2, Frame 3, and Frame 4. Note that the number of LEDs used as a unit is not limited to four as in Figure 10, and may be any number other than four.

[0076] In this way, pseudo-gradation is a gradation that is expressed by changing the number and position of emitting LEDs in a unit of multiple LEDs. In other words, pseudo-gradation is a gradation expression method that increases the number of gradations artificially without reducing resolution by changing the number and position of emitting LEDs per unit area.

[0077] In this way, by controlling the LED light emission using pseudo-gradation in the low brightness range, when re-shooting is performed, the occurrence of lines where the exposure time and readout time overlap on a specific line and there is no exposure time, as occurs when control is performed using thinned-out light emission, is suppressed, and the occurrence of banding is suppressed even when re-shooting.

[0078] Furthermore, for example, in regard to whether or not LED light emission control using pseudo-gradation corresponding to re-shooting is performed at low brightness, a specific operation button may be provided on the video wall controller 32 so that it can be set by switching between light emission control using pseudo-gradation and light emission control using thinned-out light emission, or it may be set according to a command supplied from the PC 30.

[0079] Furthermore, by separately providing an imaging device that captures an image near the LED display, particularly in front of the display surface, and performing object recognition processing on the captured image, when an imaging device capable of capturing (re-capturing) the image displayed on the LED display is detected in the image, it may be possible to set it so that LED light emission control is performed using pseudo-gradation corresponding to re-capturing at low brightness. Furthermore, for example, the detection of the imaging device may be performed based on a signal transmitted wirelessly or by wire from the imaging device to display system 11.

[0080] <<9. Display Processing>> Next, the display process performed by the display system 11 in FIG. 1 will be described with reference to the flowchart in FIG.

[0081] In step S11, the signal processing unit 78 receives an input of a video signal made up of content data or the like supplied from the video server 31 via one of the HDMI terminal 72, the DP terminal 73, and the DVI terminal 74 and the signal input IF 77.

[0082] In step S12, the signal processing unit 78 converts the video format of the received input video signal.

[0083] In step S13, the signal processing unit 78 receives the input of a control signal supplied from the MPU 76 in response to the operation of the PC 30, and executes signal processing such as color temperature, contrast, and brightness.

[0084] In step S14, the signal processing unit 78 allocates and distributes the processed video signals to the display units 51-1 to 51-n of the video wall 33.

[0085] In step S15, the signal processing unit 78 transmits and outputs the distributed video signals to the corresponding display units 51-1 to 51-n.

[0086] Through the above series of processes, the video signal read from the video server 31 is subjected to signal processing, and then distributed and transmitted to each of the display units 51-1 to 51-n that make up the video wall 33, so that individual images are displayed on the display units 51-1 to 51-n, enabling the video wall 33 as a whole to display the video content images.

[0087] <<10. Driver control processing by the display unit>> Next, the driver control process by the display unit 51 will be described with reference to the flowchart of FIG.

[0088] In step S31, the signal processing unit 112 in the driver control unit 91 of the display unit 51 receives the input of the video signals distributed and supplied from the video wall controller 32 via the signal input IF 111 on a row-by-row basis.

[0089] In step S32, the signal processing unit 112 performs video signal processing on the row-by-row video signals distributed as the display units 51, performing color and brightness correction corresponding to each display unit 51. Details of the video signal processing will be described later with reference to the flowchart in FIG.

[0090] In step S33, the signal processing unit 112 allocates the row-by-row video signals that have been subjected to the video signal processing to the LED drivers 121-1 to 121-N in the LED block 92, and transmits them via the corresponding output IFs 114-1 to 114-N.

[0091] In step S34, the LED drivers 121-1 to 121-N in the LED block 92 perform LED drive control processing based on the video signal on a row-by-row basis, and display images on a row-by-row basis at appropriate brightness through PWM control in each of the LED arrays 122-1 to 122-N.

[0092] Through the above processing, appropriate brightness adjustment is performed on each of the display units 51 that make up the video wall 33, and the brightness is output to the LED block 92, making it possible to display images row by row in sequence.

[0093] <<11. Video Signal Processing>> Next, the video signal processing, which is the processing in step S32 described above, will be described.

[0094] In step S51, the signal processing unit 112 applies gamma correction to the video signal.

[0095] In step S52, the signal processing unit 112 performs uniformity adjustment on the gamma-corrected video signal to suppress color unevenness and brightness unevenness across the entire image.

[0096] In step S53, the signal processing unit 112 performs temperature correction and burn-in correction on the video signal that has been subjected to the uniformity adjustment.

[0097] In step S54, the signal processing unit 112 determines whether to enter a mode that takes measures to suppress banding that occurs when an image displayed on the LED display is captured by an imaging device such as another camera, i.e., when the image is re-captured.

[0098] This may be done by having the mode set in advance by the user, or, for example, by capturing an image in front of the display surface of the LED display, setting up the imaging device, and determining whether or not the environment is suitable for re-capturing.

[0099] If it is determined in step S54 that the mode is one in which measures are taken to suppress banding that occurs in re-shooting, the process proceeds to step S55.

[0100] In step S55, based on the video signal that has been subjected to temperature correction and burn-in correction, the signal processing unit 112 generates a video signal that uses a gradation expression including pseudo-gradation that is realized by controlling the number of emitting LEDs and the positions of the emitting LEDs in units of multiple LEDs, as described above with reference to the lower part of Figure 9 and Figure 10.

[0101] On the other hand, if it is determined in step S54 that the mode is not one that implements measures to suppress banding that occurs in re-shooting, the process proceeds to step S56.

[0102] In step S56, the signal processing unit 112 generates a video signal using gradation expression including control by thinned-out light emission, as described with reference to the upper part of Figure 9, based on the video signal that has been subjected to temperature correction and burn-in correction.

[0103] With the above processing, when responding to re-shooting, the brightness of high brightness gradations represented by the higher bits is adjusted by adjusting the length of the light emission time, and the brightness of low brightness gradations represented by the lower bits is adjusted using pseudo gradations.

[0104] Therefore, when re-shooting is performed, light emission control using thinned-out light emission is not performed, so it is possible to suppress the occurrence of banding even in low illuminance.

[0105] The number of upper bits representing high luminance gradations and the number of lower bits representing low luminance gradations are not limited to the above-mentioned bit numbers.

[0106] Furthermore, in the above, an example has been described in which pseudo-gradation is used only when measures are taken to retake an image, but pseudo-gradation may be used at all times regardless of whether retaking an image is performed or not.

[0107] The present disclosure can also be configured as follows. <1> It has a light emission control unit that controls the light emission of the LEDs that make up the LED (Light Emitting Diode) array, The light emission control unit expresses a part of the gradation of brightness of the LED by light emission control in units of a plurality of the LEDs. Drive control device. <2> The light emission control unit controls the light emission of the LEDs constituting the LED array by a passive matrix driving method that controls the light emission of the LEDs in the LED array on a scan line basis. <1> The drive control device described in <3> The light emission control unit expresses a gradation of luminance lower than a predetermined luminance of the LED by controlling light emission in units of a plurality of the LEDs. <1> or <2> The drive control device described in <4> The light emission control unit expresses a gradation of brightness lower than a predetermined brightness of the LED by controlling a pattern consisting of the number and positions of the LEDs that emit light, with a plurality of the LEDs as a unit. <3> The drive control device described in <5> The light emission control unit sequentially changes patterns in which the number of the LEDs emitting light is the same but the positions are different for brightness lower than a predetermined brightness of the LEDs within the same frame. <4> The drive control device described in <6> When the light emission control unit is in a mode corresponding to capturing an image displayed by the LED array, the light emission control unit expresses gradations of luminance lower than a predetermined luminance of the LED by controlling light emission in units of a plurality of the LEDs. <1> or <2> The drive control device described in <7> When the mode is not suitable for capturing an image displayed by the LED array, the light emission control unit controls the LEDs to emit light at a lower luminance level than a predetermined luminance level by thinning out the number of times the LEDs are repeatedly emitted within the same frame. <6> The drive control device described in <8> When an imaging device capable of capturing an image displayed by the LED array is detected, the light emission control unit expresses a gradation of brightness lower than a predetermined brightness of the LED by controlling light emission in units of a plurality of the LEDs. <1> or <2> The drive control device described in <9> further comprising an imaging unit that captures an image of the vicinity; When the imaging device is detected based on the image captured by the imaging unit, the image of the vicinity, or a signal emitted by the imaging device, the light emission control unit expresses a gradation of brightness lower than a predetermined brightness of the LED by controlling light emission of the plurality of the LEDs as a unit. <8> The drive control device described in <10> A step of controlling light emission of LEDs constituting an LED (Light Emitting Diode) array, The processing of the step expresses a part of the gradation of the brightness of the LED by controlling the light emission of a plurality of the LEDs as a unit. Drive control method. <11> The processing of the step is controlled by a passive matrix driving method that controls the light emission of the LEDs that make up the LED array in units of scan lines. <10> The drive control method according to claim 1. <12> The processing of the step expresses a gradation of brightness lower than a predetermined brightness of the LED by controlling light emission in units of a plurality of the LEDs. <10> or <11> The drive control method according to claim 1. <13> The processing of the step expresses a gradation of brightness lower than a predetermined brightness of the LED by controlling a pattern consisting of the number and positions of the LEDs that emit light, with a plurality of the LEDs as a unit. <12> The drive control method according to claim 1. <14> The processing of the step is to sequentially change and express patterns in which the number of the LEDs that emit light is the same but the positions are different for brightness lower than a predetermined brightness of the LEDs within the same frame. <13> The drive control method according to claim 1. <15> In the processing of the step, when the mode corresponds to capturing an image displayed by the LED array, gradations of brightness lower than a predetermined brightness of the LED are expressed by light emission control in units of a plurality of the LEDs. <10> or <11> The drive control method according to claim 1. <16> When the processing of the step is not in a mode corresponding to capturing an image displayed by the LED array, the gradation of brightness lower than the predetermined brightness of the LED is expressed by control using thinned-out light emission, in which the number of times light is repeatedly emitted within the same frame is thinned out. <15> The drive control method according to claim 1. <17> In the processing of the step, when an imaging device capable of capturing an image displayed by the LED array is detected, gradations of brightness lower than a predetermined brightness of the LED are expressed by light emission control in units of a plurality of the LEDs. <10> or <11> The drive control method according to claim 1. <18> In the processing of the step, when the imaging device is detected based on a nearby image or a signal emitted by the imaging device, a gradation of brightness lower than a predetermined brightness of the LED is expressed by light emission control in units of a plurality of the LEDs. <17> The drive control method according to claim 1. <19> a display unit including a display unit having LEDs (Light Emitting Diodes) arranged in an array and a drive control device that controls the driving of the LEDs; a distribution unit that receives an input of a video signal, performs predetermined signal processing on the video signal, and distributes the video signal to the display unit; The drive control device includes: a light emission control unit that controls the light emission of the LED; The light emission control unit expresses a part of the gradation of brightness of the LED by light emission control in units of a plurality of the LEDs. Information processing system. <20> a display unit including a display unit having LEDs (Light Emitting Diodes) arranged in an array and a drive control device that controls the driving of the LEDs; an information processing method for an information processing system including a distribution unit that receives an input of a video signal, performs predetermined signal processing on the video signal, and distributes the video signal to the display unit, the drive control device includes a step of controlling light emission of the LED; The processing of the step expresses a part of the gradation of the brightness of the LED by controlling the light emission of a plurality of the LEDs as a unit. Information processing method for an information processing system. [Explanation of symbols]

[0108] 11 display system, 30 PC, 31 video server, 32 video wall controller, 33 video wall, 51, 51-1 to 51-n display unit, 78 signal processing unit, 91 driver control unit, 92 driver block, 112 signal processing unit, 121, 121-1 to 121-N drive circuit, 122 pixel array, 141 LED

Claims

1. It is equipped with a light-emitting control unit that controls the light emission of the LEDs that make up the LED (Light Emitting Diode) array. The light emission control unit When the mode corresponds to capturing an image displayed by the LED array, light emission control is performed to express a gradation of luminance lower than a predetermined luminance for each of the plurality of LEDs set as a unit, in which the number of emitting LEDs is the same but the positions are different, by sequentially changing the patterns within the same frame; When the mode is not compatible with capturing an image displayed by the LED array, light emission control is performed to express gradations of brightness lower than a predetermined brightness by thinning out the number of times light is repeatedly emitted within the same frame. Drive control device.

2. The light emission control unit controls the light emission of the LEDs constituting the LED array by a passive matrix driving method that controls the light emission of the LEDs in the LED array on a scan line basis. The drive control device according to claim 1 .

3. When an imaging device capable of capturing an image displayed by the LED array is detected, the light emission control unit determines that the mode is a mode corresponding to capturing an image displayed by the LED array. The drive control device according to claim 1 .

4. When the imaging device is detected in the vicinity by object recognition processing based on an image of the vicinity, or when the imaging device is detected based on a signal emitted by the imaging device, the light emission control unit determines that the mode is a mode corresponding to capturing an image displayed by the LED array. The drive control device according to claim 3 .

5. This includes controlling the light emission of LEDs that make up an LED (Light Emitting Diode) array. The control process includes: When the mode corresponds to capturing an image displayed by the LED array, light emission control is performed to express a gradation of luminance lower than a predetermined luminance for each of the plurality of LEDs set as a unit, in which the number of emitting LEDs is the same but the positions are different, by sequentially changing the patterns within the same frame; When the mode is not compatible with capturing an image displayed by the LED array, light emission control is performed to express gradations of brightness lower than a predetermined brightness by thinning out the number of times light is repeatedly emitted within the same frame. Drive control method.

6. The control process is performed using a passive matrix driving method that controls the light emission of the LEDs that make up the LED array on a scan line basis. The drive control method according to claim 5 .

7. When an imaging device capable of capturing an image displayed by the LED array is detected, the control process determines that the mode is a mode corresponding to capturing an image displayed by the LED array. The drive control method according to claim 5 .

8. The control process determines that the mode corresponds to capturing an image displayed by the LED array when the imaging device is detected in the vicinity by an object recognition process based on an image of the vicinity, or when the imaging device is detected based on a signal emitted by the imaging device. The drive control method according to claim 7.

9. a display unit including a display unit having an array of LEDs (Light Emitting Diodes) and a drive control device that controls the driving of the LEDs; a distribution unit that receives an input of a video signal, performs predetermined signal processing on the video signal, and distributes the video signal to the display unit; The drive control device includes: a light emission control unit that controls the light emission of the LED; When the mode corresponds to capturing an image displayed by the LEDs arranged in the array, light emission control is performed to express a gradation of luminance lower than a predetermined luminance for each of the plurality of LEDs set as a unit, in which the number of emitting LEDs is the same but the positions are different, by sequentially changing the patterns within the same frame; When the mode is not compatible with capturing an image displayed by the LEDs arranged in the array, light emission control is performed to express gradations of brightness lower than a predetermined brightness by thinning out the number of times light is repeatedly emitted within the same frame. Information processing system.

10. a display unit including a display unit having an array of LEDs (Light Emitting Diodes) and a drive control device that controls the driving of the LEDs; an information processing method for an information processing system including a distribution unit that receives an input of a video signal, performs predetermined signal processing on the video signal, and distributes the video signal to the display unit, the drive control device performs a control process for controlling light emission of the LED; The control process includes: When the mode corresponds to capturing an image displayed by the LEDs arranged in the array, light emission control is performed to express a gradation of luminance lower than a predetermined luminance for each of the plurality of LEDs set as a unit, in which the number of emitting LEDs is the same but the positions are different, by sequentially changing the patterns within the same frame; When the mode is not compatible with capturing an image displayed by the LEDs arranged in the array, light emission control is performed to express gradations of brightness lower than a predetermined brightness by thinning out the number of times light is repeatedly emitted within the same frame. Information processing method for an information processing system.

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