JP4808073B2 - Display device - Google Patents

Description

  The present invention relates to a display device that illuminates a display panel using a backlight having a plurality of light emitting areas and displays an image based on a video signal. More specifically, the upper and lower ends or left and right ends of the display area are provided. The present invention relates to a display device that displays black images with different aspect ratios.

  In recent years, with the lightening and thinning of personal computers and television receivers, displays are also required to be lighter and thinner. According to such demands, a liquid crystal display (LCD) is used instead of a cathode ray tube (CRT). Flat panel displays have been put into practical use. In recent years, various technologies for improving the display quality of flat panel displays have been actively developed.

  An LCD applies an electric field to a liquid crystal layer having an anisotropic dielectric constant injected between two substrates, and adjusts the amount of light transmitted through the substrate by adjusting the strength of the electric field. Is a display device. Such an LCD is a typical portable flat panel display, and among them, a TFT-LCD using a thin film transistor (TFT) as a switching element is mainly used.

  By the way, in the NTSC (National Television System Committee) system such as color television broadcasting carried out in Japan, the aspect ratio of the video is 4: 3, but the HDTV (High Definition Television) system. In a system called “vista size” implemented in movies and the like, a screen having an aspect ratio that is wider than 4: 3 is used (for example, the aspect ratio is 16: 9 in the HDTV system).

  Therefore, in order to be able to receive video content having an aspect ratio longer than 4: 3 (for example, an aspect ratio of 16: 9) even with the current NTSC television receiver (aspect ratio of 4: 3), A so-called display form is used. In this letterbox system, as shown in FIG. 9A, a video portion 101 having an aspect ratio of 16: 9 is displayed at the center of a display screen 100 having an aspect ratio of 4: 3, and the upper and lower portions thereof have no video. This is a display form in which the non-picture area 102 is provided. With this, even in an NTSC television receiver, it is possible to view movie software or the like without cutting left and right (no trimming).

  When this letterbox video signal is received by a wide screen receiver with a horizontally long screen (16: 9 aspect ratio), only the video portion is displayed on the entire display screen to make the display screen effective. Can be used for

  In order to enable reception of image content having an aspect ratio of 4: 3 by an HDTV television receiver (wide television receiver) having a horizontally long display screen (for example, an aspect ratio of 16: 9). As shown in FIG. 9 (b), a side panel that displays a video part 201 with an aspect ratio of 4: 3 at the center of a display screen 200 with an aspect ratio of 16: 9, and uses a left and right part as a non-video area 202 without video. A display form called a method is known.

  By the way, when the above-mentioned letter box type and side panel type images are displayed on the display panel as they are, no image is displayed on the upper or lower part or the left and right parts of the screen depending on the aspect ratio of the video part and the aspect ratio of the display screen (black). Display), but the backlight is always lit even in this non-video area, and there is a problem that wasteful power is consumed.

Therefore, Patent Document 1 discloses a liquid crystal display device that automatically turns off the backlight for a non-video area when displaying an image having an aspect ratio different from the aspect ratio of the liquid crystal panel. .
JP 2004-184937 A

  Since the technique disclosed in Patent Document 1 automatically turns off the light emitting area of the backlight corresponding to the non-video area, it is possible to reduce wasteful power consumption and realize energy saving. However, in consideration of the global environment such as global warming in recent years, consumer interest in energy saving has increased, and a technology for further reducing the power consumption of the backlight system has been demanded.

  The present inventor conducted research on the visual impression that the above-described letter box type and side panel type video display has on humans. As a result, the total luminance of the display area is reduced by the non-picture area (black obi). In addition, the brightness of the video area will increase, and even if the brightness of the video area is reduced according to the area of the non-video area, the viewer has obtained knowledge that the displayed video does not have a particular sense of incongruity . That is, conversely, since the display image is emphasized by the non-image area, the display image feels bright. This is the same as when the image is viewed in a dark environment and the image that is normally felt in a bright environment is dazzled.

  The present invention has been made with this knowledge. The backlight emission area corresponding to the non-video area is turned off, and the luminance of the backlight emission area corresponding to the video area not corresponding to the non-video area is reduced. It is an object of the present invention to provide a display device that can reduce power consumption of a backlight system by adjusting.

A display device according to the present invention irradiates a display panel using a backlight having a plurality of light emitting areas, and displays an image based on a video signal. There is no image in the display area of the display panel. A determination means for determining a video area, an extinguishing means for turning off the light emission area of the backlight corresponding to the non-video area, and an adjustment to reduce the luminance of the light emission area of the backlight not corresponding to the non-video area to an adjusting means, said adjustment means, said as the area of the non-image area is large, the said Citea Rukoto to adjust lower the luminance of the light emitting region of the backlight which does not correspond to the non-image area And

In the present invention, a non-video area having no video in the display area of the display panel is determined. Then, the backlight emission area corresponding to the non-video area is turned off, and the luminance of the backlight emission area that does not correspond to the non-video area is adjusted to be low . As the area of the non-video area increases, the luminance of the light emitting area of the backlight that does not correspond to the non-video area is adjusted to be low. Since the total brightness of the display area is determined by the area of the non-video area, adjusting the brightness according to the area of the non-video area prevents the viewer from having a special discomfort in the display video. .
As a result, the light emission area of the backlight corresponding to the non-video area that does not require light emission can be turned off to reduce power consumption, and the display area excluding the non-video area, that is, the backlight corresponding to the video area can be reduced. By reducing the luminance of the light emitting region, it is possible to further reduce power consumption.

Display device according to the present invention, the adjusting means in accordance with the area ratio of the non-image area occupying the display area is increased, and the to adjust the brightness of the light emitting region of the backlight which does not correspond to non-image area lower It is characterized by being.

In the present invention, as the area ratio of the non-video area occupying the display area increases, the luminance of the light emitting area of the backlight that does not correspond to the non-video area is adjusted to be low . Even if the area of the non-image area is the same, the visual impression on the viewer differs depending on the size of the display area , so the brightness is adjusted to be lower as the area ratio of the non-image area to the display area increases. This prevents the viewer from having a special discomfort in the displayed image regardless of the size of the display area.

  The display device according to the present invention further includes detection means for detecting a signal period indicating no video in the video signal, and the determination means is configured to display the display panel based on the signal period detected by the detection means. It is characterized in that the non-video area in is determined.

  In the present invention, a signal period indicating no video in the video signal is detected, and a non-video area in the display panel is determined based on the detected signal period. Since the non-video area is determined from the video signal that is the source of the video, the real video included in the video signal is not identified as the non-video area, and the video can be displayed without being trimmed.

  The display device according to the present invention is configured to receive a video size setting in the vertical direction and / or horizontal direction based on the video signal, and to output the video signal based on the video size received by the reception unit. Signal processing means for processing, wherein the discrimination means discriminates a non-video area in the display panel based on the video size received by the reception means.

  In the present invention, the setting of the video size in the vertical direction and / or the horizontal direction of the video based on the video signal is received, and the video signal is signal-processed based on the received video size. Based on the received video size, a non-video area on the display panel is determined. A process for detecting a signal period indicating no video in the video signal from the video signal is unnecessary, and the configuration can be extremely simplified.

  The display device according to the present invention includes a partition member for partitioning the light emitting regions of the backlight.

  In this invention, the partition member for partitioning between each light emission area | region of a backlight is provided. By this partition member, each display area of the display panel is irradiated with each light emitting area constituting the backlight being independent. Further, the partition member prevents light irradiation from other light emitting areas, and makes the luminance irradiated to each display area uniform. Therefore, it is possible to efficiently irradiate the display area with backlight light.

  According to the present invention, the light emitting area of the backlight corresponding to the non-video area is turned off and the luminance of the light emitting area of the backlight that does not correspond to the non-video area is adjusted. The power consumption can be reduced by turning off the light emitting area of the backlight of the area, and the power consumption can be further reduced by lowering the luminance of the display area excluding the non-video area, that is, the video area. In addition, since the total brightness of the display area is determined by the area of the non-video area, adjusting the brightness according to the area of the non-video area does not give the viewer a special feeling of strangeness in the display video. Can be. Furthermore, by adjusting the luminance based on the area ratio of the non-video area occupying the display area, it is possible to prevent the viewer from having a special discomfort in the display video regardless of the size of the display area.

  According to the present invention, since the non-video area on the display panel is determined from the video signal, the real video included in the video signal is not identified as the non-video area, and the video is not trimmed. Can be displayed.

  According to the present invention, the vertical size and / or horizontal size settings of the video are received, and the non-video area in the display panel is determined based on the received video size. Therefore, it is not necessary to detect the signal period from the video signal, and the configuration can be greatly simplified.

  According to the present invention, since the partition member for partitioning between the light emitting regions of the backlight is provided, each display region of the display panel is irradiated with each light emitting region constituting the backlight being independent. Can do. In addition, the partition member can prevent light from being emitted from other light emitting areas, and can uniformly illuminate each display area, thereby efficiently irradiating the display area with backlight light. It produces excellent effects such as

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.

(Embodiment 1)
FIG. 1 is a block diagram showing a configuration example of a display device according to Embodiment 1 of the present invention.
The display device according to the first embodiment of the present invention includes a control unit 10, an operation unit 11, a tuner unit 12, a video signal processing unit 13, a non-video signal detection unit 14, a liquid crystal driving unit 15, a liquid crystal panel 16, and a light source driving unit. 17 and a backlight device 18 are provided.

  Specifically, the control unit 10 is configured by a CPU, and is connected to the above-described units. The control unit 10 controls them and executes various functions in accordance with a control program stored in a built-in ROM.

  The operation unit 11 includes various function keys for operating the display device. For example, there are a power key for turning on / off the main power, a channel key for selecting a broadcast channel by the tuner unit 12, and a voice key for instructing increase / decrease of sound.

  The tuner unit 12 is connected to, for example, an antenna arranged in the direction of the broadcast relay base, and has a function of selecting and demodulating a video signal in a specific frequency band among video signals transmitted from the broadcast relay base. Have. Currently, the terrestrial frequency bands that are widely used are the VHF band low frequency (90 M to 108 MHz), the VHF band high frequency (170 M to 222 MHz), and the UHF band (470 M to 770 MHz). The video signal of one channel designated by the user is selected and input to the video signal processing unit 13. Of course, a tuner that supports terrestrial digital broadcasting, satellite broadcasting, cable television broadcasting, and the like may be used.

  The video signal processing unit 13 performs various processes on the video signal demodulated by the tuner unit 12. For example, an image quality adjustment instruction such as hue is received, and appropriate processing is performed on the video signal in accordance with the received image quality adjustment instruction.

  The no-video signal detection unit 14 is a means for detecting a signal period indicating no video in the video signal. Here, whether or not a no-video signal without video is added to the upper and lower parts of the video based on the video signal. Is detected, and a non-video area having no video is determined from the display area of the liquid crystal panel 16. The no-video signal detection unit 14 calculates the area of the no-video area defined by the no-video signal when the video signal includes the no-video signal. Since the area of the non-video area when an image is displayed is determined by the signal period of the non-video signal in the video signal, the non-video signal occupancy time per unit time (one frame) of the video signal The area of the video area can be calculated.

  In the case of the NTSC system, since one frame is composed of 16.7 msec, the area of the non-video area is calculated by detecting the total time of the non-video signal occupying one frame. Since the signal includes a time unrelated to the video such as a blanking period, the unrelated time T1 is subtracted from the frame time T2. For example, when it is detected that the total time of the non-video signal in one frame is T3, the area ratio of the non-video area in the display area is T3 / (T2-T1).

  The liquid crystal driving unit 15 generates a gate signal and a data signal based on the video signal that has been subjected to various processes by the video signal processing unit 13, and gives the liquid crystal panel 16 by supplying the gate signal and the data signal to the liquid crystal panel 16. To drive. The light transmittance of the liquid crystal material is determined by a data signal that determines the liquid crystal applied voltage. As shown in the electro-optical characteristics of the liquid crystal substance in FIG. 2, when the liquid crystal panel 16 is in a normally black (NB) mode, the transmittance is increased by increasing the voltage applied to the liquid crystal layer (FIG. 2). : Solid line), when the liquid crystal panel 16 is in the normally white (NW) mode, the transmittance is lowered by increasing the voltage applied to the liquid crystal layer (FIG. 2: broken line).

  The liquid crystal panel 16 has a liquid crystal layer in which a pair of transparent plates are arranged to face each other and a liquid crystal substance is sealed in a gap therebetween. One transparent plate is formed with a transparent pixel electrode such as ITO or NESA arranged in a matrix and a TFT for controlling the supply of electric charge to the pixel electrode. A transparent common electrode called a common electrode is formed. The gate and source of the TFT are determined by the electro-optic characteristics of the liquid crystal material by controlling the on / off of each pixel by a gate signal input by the liquid crystal driving unit 15 and applying a data signal to each pixel during the on period. Control the light transmittance.

  The backlight device 18 is a direct-type backlight device that is disposed on the back surface of the liquid crystal panel 16 and includes a plurality of light sources 18a, 18a,. As shown in FIG. 3, the backlight device 18 includes a reflection sheet 31 disposed on the inner surface of a box-shaped backlight chassis 30 having one surface (front surface) opened, and each of the light sources 18 a, 18 a,. Are arranged along the horizontal direction of the display surface. As the light sources 18a, 18a,..., Cold cathode ray discharge tubes (CCFLs) that emit white light having a long life and close to natural light and generate little heat are used, for example.

  .. Are arranged in the gaps between the light sources 18a, 18a,..., And the light emitting areas of the light sources 18a, 18a,. Each display area of the liquid crystal panel 16 is irradiated. Further, the partition members 33, 33,... Prevent light irradiation from other light sources and make the luminance irradiated to each display region uniform. In this example, the light source group R1 that is a non-image area and the light source group R2 that is an image area that is not a non-image area coincide with the letterbox display area. The partition member 33 is made of a light reflective material such as aluminum so that the emitted light from the light source is efficiently reflected to the front surface.

  Further, on the front side of the backlight chassis 30 (light irradiation side of the light source 18a), a diffusion sheet for diffusing the light from the light source 18a into uniform plane light, the wavelength (color) of the light from the light source 18a. ) Is provided. An optical sheet 34 such as a color correction sheet is provided.

  The light source driving unit 17 has a function of increasing the pressure to a high pressure necessary for causing the light source to emit light and adjusting the frequency to suppress flicker. In this example, a switching unit 17a for controlling power supply to each light source is provided so that each light source of the backlight device 18 can be turned on and off independently.

  As shown in FIG. 4, the switching unit 17a can independently turn on and off the light source group R1 that is a non-image area and the light source group R2 that is not a non-image area in letterbox display. In the normal display mode, power is supplied from the light source driving unit 17 to the light source group R1 and the light source group R2 (FIG. 4A). In the letterbox display mode, power is supplied from the light source driving unit 17 only to the light source group R2. Is supplied (FIG. 4B). Furthermore, in the present invention, the voltage to be applied and the frequency of the pulse wave to be applied can be changed so that the luminance of each light source can be adjusted. Specifically, the light source driving unit 17 adjusts the luminance of the light source group R2 that does not correspond to the non-video area based on the area ratio of the non-video area in the display area.

  FIG. 5 is a flowchart showing a processing procedure performed by the display device according to Embodiment 1 of the present invention. The processing procedure is an example, and the present invention is not limited to this.

  First, the non-video signal detector 14 determines whether or not a non-video signal having no video in the upper and lower parts of the video based on the video signal is included in the video signal (step S1). When it is determined that the non-video signal is not included in the video signal (S1: NO), the control unit 10 ends the process related to the backlight system.

  On the other hand, when it is determined that the video signal includes a non-video signal (S1: YES), the control unit 10 performs the non-video area in the liquid crystal panel 16 based on the non-video signal included in the video signal. Is determined (step S2).

  Then, the light source driving unit 17 is instructed to turn off the light source (light source group R1) of the backlight device 18 corresponding to the non-video region, and the light source driving unit 17 enters the non-video region according to the instruction of the control unit 10. The corresponding light source group R1 of the backlight device 18 is turned off (step S3).

  Further, in addition to S3, the control unit 10 determines the light source (light source group) of the backlight device 18 that does not correspond to the non-video area based on the area of the non-video area (for example, the area ratio of the non-video area in the display area). The light source driving unit 17 is instructed to decrease the luminance of R2), and the light source driving unit 17 decreases the luminance of the light source group R2 of the backlight device 18 that does not correspond to the non-image area according to the instruction of the control unit 10 (step S4). ).

  For example, as shown in FIG. 6, in the normal display mode, drive signals are supplied to all the light sources (light source group R1 and light source group R2) constituting the backlight device, and the light source group R1 and the light source group R2 are supplied. Is turned on (FIG. 6A). On the other hand, in the letterbox display mode, the supply of the drive signal to the light source (light source group R1) corresponding to the non-video area is stopped. Thereby, since the light source group R1 corresponding to the non-video area of the backlight device is turned off, it is possible to reduce useless power consumption and realize energy saving. Further, the luminance B of the light source (light source group R2) of the backlight device 18 not corresponding to the non-image area is set lower than the luminance A in the normal display mode (luminance B <luminance A). Thereby, since the power supply amount to the light source group R2 is reduced, it is possible to further reduce power consumption and realize energy saving (FIG. 6B).

  In general, in an image having a non-image area such as a letterbox method and a side panel method, the entire luminance is reduced by the area of the non-image area as compared with a case where an image is present in all normal display areas. Since the viewer sees the video emphasized by the non-video area, the brightness of the video area increases visually. Therefore, even if the luminance of the video area is reduced based on the area of the non-video area, the viewer does not have a special discomfort. Utilizing this visual characteristic, the luminance of the video area is lowered during non-video display, thereby further reducing the power consumption of the backlight system.

(Embodiment 2)
FIG. 7 is a block diagram showing a configuration example of a display device according to Embodiment 2 of the present invention.
The display device according to Embodiment 2 of the present invention includes a control unit 20, an operation unit 21, a tuner unit 12, a video signal processing unit 23, a liquid crystal driving unit 15, a liquid crystal panel 16, a light source driving unit 17, a backlight device 18, and the like. It has.

  Specifically, the control unit 20 is configured by a CPU, and is connected to each of the above-described units. The control unit 20 controls them and executes various functions according to a control program stored in a built-in ROM.

  The operation unit 21 includes various function keys for operating the display device. In this example, a display mode selection key 21a is provided, and a display mode instruction is received by the viewer. The display mode is, for example, a normal display mode, a letterbox display mode, and a side panel display mode, and accepts the setting of the video size in the vertical and / or horizontal directions of the video from the viewer. In this example, it is assumed that either the normal display mode or the letterbox display mode can be selected, and the area ratio of the non-picture area in the display area in the letterbox display mode is stored in the ROM in advance. .

  The video signal processing unit 23 performs various processes on the video signal demodulated by the tuner unit 12. In this example, a video size setting unit 23 a is provided, and processing for setting a video signal to an appropriate video size is performed according to the display mode received by the operation unit 21. In addition, an image quality adjustment instruction such as hue may be received, and appropriate processing may be performed on the video signal in accordance with the received image quality adjustment instruction.

  When the viewer accepts the letterbox display mode, the video signal processing unit 23 displays a video signal in a display form in which a video is arranged in the central portion of the display area and a non-video area without video is arranged in the upper and lower portions thereof. Convert to When the viewer accepts the side panel display mode, the video signal processing unit 23 has a display form in which a video is arranged in the central part of the display area and a non-video area with no video is arranged in the left and right parts thereof. Convert to video signal.

  As in the first embodiment, the light source driving unit 17 includes a switching unit 17a for controlling power supply to each light source. When the operation unit 21 receives the normal display mode, the switching unit 17a supplies power to the light source group R1 and the light source group R2 from the light source driving unit 17 (FIG. 4A). When the box display mode is accepted, power is supplied from the light source driving unit 17 only to the light source group R2 (FIG. 4B). Further, the light source driving unit 17 adjusts the luminance of the light source group R2 that does not correspond to the non-video area based on the area of the non-video area. Since other configurations are the same as those of the first embodiment, the corresponding parts are denoted by the same reference numerals and detailed description thereof is omitted.

  FIG. 8 is a flowchart showing a processing procedure performed by the display device according to Embodiment 2 of the present invention. The processing procedure is an example, and the present invention is not limited to this.

  First, a display mode instruction is received by the viewer using the display mode selection key 21a of the operation unit 21 (step S11). Then, the control unit 20 determines whether or not the received display mode is the letterbox display mode (step S12). When it is determined that the received display mode is not the letterbox display mode (S12: NO), the control unit 20 ends the process without changing the process related to the backlight system.

  On the other hand, when it is determined that the received display mode is the letterbox display mode (S12: YES), the video signal processing unit 23 converts the video signal to an appropriate size according to the received display mode (ie, the letterbox display mode). (Step S13).

  Next, the non-image area in the liquid crystal panel 16 is determined based on the image size setting received by the operation unit 21 (step S14). Then, the control unit 20 instructs the light source driving unit 17 to turn off the light source (light source group R1) of the backlight device 18 corresponding to the non-image area, and the light source driving unit 17 instructs the control unit 20 to Accordingly, the light source group R1 of the backlight device 18 corresponding to the non-image area is turned off (step S15). Thereby, since the light source (light source group R1) corresponding to the non-image area of the backlight device is turned off, it is possible to reduce useless power consumption and realize energy saving.

  Further, in addition to S15, the control unit 20 uses the light source (light source group) of the backlight device 18 not corresponding to the non-video area based on the area of the non-video area (for example, the area ratio of the non-video area in the display area). The light source driving unit 17 is instructed to decrease the luminance of R2), and the light source driving unit 17 decreases the luminance of the light source group R2 of the backlight device 18 that does not correspond to the non-image area according to the instruction of the control unit 20 (step S16). ). Since the viewer sees the video emphasized by the non-video area, the brightness of the video area increases visually. As in the first embodiment, even if the luminance of the video area is reduced based on the area of the non-video area, the viewer does not have a particular sense of incongruity. Utilizing this visual characteristic, the luminance of the video area is lowered during non-video display, thereby further reducing the power consumption of the backlight system.

  Furthermore, a process for detecting a non-video area is not performed by determining the non-video area in the liquid crystal panel 16 based on the video size setting received by the operation unit 21 instead of detecting the non-video area from the video signal. Is not required, and the configuration can be greatly simplified.

  In the embodiment, the letterbox display mode in which the non-video area is arranged at the left and right ends of the display area has been described, but it goes without saying that the present invention can be applied even in the case of the side panel display mode. . Moreover, although the form using CCFL as a linear light source was demonstrated as a light source, light sources, such as LED as a point light source and EL as a planar light source, may be sufficient.

It is a block diagram which shows the structural example of the display apparatus which concerns on Embodiment 1 of this invention. It is a characteristic view which shows an example of the electro-optical characteristic of a liquid crystal substance. It is a perspective view which shows the structural example of a backlight apparatus. It is a block diagram which shows the structural example of a switching part. It is a flowchart which shows the process sequence which the display apparatus which concerns on Embodiment 1 of this invention performs. It is a figure for demonstrating the process which the display apparatus which concerns on this invention performs. It is a block diagram which shows the structural example of the display apparatus which concerns on Embodiment 2 of this invention. It is a flowchart which shows the process sequence which the display apparatus which concerns on Embodiment 2 of this invention performs. It is explanatory drawing which shows (a) letterbox system and (b) side panel system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,20 Control part 11,21 Operation part 21a Display mode selection key 12 Tuner part 13,23 Video signal processing part 23a Video size setting part 14 No video signal detection part 15 Liquid crystal drive part 16 Liquid crystal panel 17 Light source drive part 17a Switching part 18 Backlight device 18a Light source 33 Partition member

Claims (5)

In a display device that illuminates a display panel using a backlight having a plurality of light emitting areas and displays an image based on an image signal,
A discriminating means for discriminating a non-video area having no video in the display area of the display panel;
A turn-off means for turning off the light emission area of the backlight corresponding to the non-video area;
Adjusting means for adjusting the luminance of the light emitting area of the backlight not corresponding to the non-image area, and
The adjusting means includes
Wherein as the area of the non-image area is increased, a display device according to claim Citea Rukoto such that the adjusting the brightness of the light emitting region of the backlight which does not correspond to non-image area decreases. The adjusting means includes
As the area ratio of the non-image area occupying the display area is increased, according to claim 1, characterized in that said are to adjust the brightness of the light emitting region of the backlight which does not correspond to non-image area lower Display device. Detecting means for detecting a signal period indicating no video in the video signal;
The discrimination means includes
On the basis of the detected signal period by the detecting means, the display device according to claim 1 or 2, characterized in that you have to determine the non-image area of the display panel. Receiving means for receiving setting of the video size in the vertical direction and / or horizontal direction of the video based on the video signal;
Signal processing means for performing signal processing on the video signal based on the video size received by the receiving means;
The discrimination means includes
On the basis of the image size accepted by accepting means, a display device according to claim 1 or 2, characterized in that you have to determine the non-image area of the display panel. Display device according to claims 1 to any one of claims 4, characterized in that it comprises a partition member for partitioning between the light emitting regions of the backlight.

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