JP2009300810A - Liquid crystal display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display device avoiding the complication of control and the enlargement of a circuit scale, and causing no unnatural feeling to a display. <P>SOLUTION: The liquid crystal display device has a liquid crystal display panel to which image signals are inputted, and a backlight having a plurality of light sources arranged on a surface that faces the liquid crystal display panel, and also has: an illuminating part controlling the light sources for every area of a plurality of areas; a luminance distribution computing part for computing the luminance distribution of the image signals corresponding to the plurality of areas, and determining the brightness of the light sources for every area; and an illumination control part for controlling the luminance of the light sources for every area of the illuminating part based on the determination of the luminance distribution computing part. The area has a shared area with the other adjacent area, and the light source of the shared area comprises: a light source drive-controlled with the light source in the area; and a light source drive-controlled with the light source in the other area. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device in which a backlight is modulated in a region according to an image signal.

  In a display device provided with an LED backlight for illuminating the liquid crystal display panel on the back surface of a liquid crystal display panel that displays an image according to an image signal, the LED backlight is divided into a plurality of areas and light is divided. The brightness distribution of the image signal corresponding to each of the areas is calculated to determine the brightness of the illumination light for each area, and based on this determination, the amount of illumination light for each area Is known that controls the image signal and corrects the image signal input to the liquid crystal display panel (see Patent Document 1 below).

  Since the display device having such a configuration controls the radiation operation of the illumination light for each area of the LED backlight based on the image signal for each area and corrects the image signal, the contrast ratio is high and uneven. There are advantages that low image quality can be obtained and power consumption of the backlight can be reduced.

Therefore, the present invention can be applied to many image display devices such as advertising displays, television displays, and personal computer displays.
JP 2005-258043 A

  Here, the LED backlight of the liquid crystal display device having the above-described configuration is approximately 1,000 LEDs (light emitting diodes) in order to obtain a necessary luminance when the liquid crystal display panel is a large size for a television having a size of 30 inches or more. Need.

  Controlling these LEDs independently leads to complication of the drive circuit, so that one region (area) is realized by a plurality of adjacent LEDs. For example, there are 20 LEDs in one area, and each area is composed of 8 × 12 areas. In this case, the required number of LEDs is 1920.

  Thus, for example, four areas of the configuration of the backlight for each area are shown in FIG. Each area is labeled A and B in the row direction and 1 and 2 in the column direction. Thereby, each area of A1, A2, B1, and B2 is configured, and the LEDs in each area are controlled independently of the LEDs in the other areas. The LEDs in each area are arranged so as to be equidistant from the adjacent LEDs. In FIG. 8, the LEDs in each area are indicated by circles, crosses, and the like, and this indicates that individual control is possible.

  For this reason, when displaying a white cursor having an area smaller than one area with respect to a black background on the liquid crystal display panel, as shown in FIG. Each LED in the area is illuminated, for example, with a relative brightness of 1 (relative brightness in other areas is 0). According to Patent Document 1 described above, surrounding light leakage is prevented by controlling the display image around the cursor. However, in the case of black display with the background having the lowest luminance, for example, as shown in FIG. On the display screen of the liquid crystal display panel, the display image cannot be controlled to be darker, and the periphery of the cursor (indicated by symbol C in the figure) will appear brighter than the surrounding area. . For this reason, a sense of incongruity is produced in the display, which leads to a deterioration in quality.

  As a countermeasure, it is conceivable to increase the number of area divisions so that the luminance appears to change little by little and to control the backlight of the area around the cursor to be bright. However, in order to realize this, it is necessary to perform conversion including the image of the surrounding area in order to generate a conversion image of a certain area, and it is inevitable that the control is complicated and the circuit scale is increased. End up.

  An object of the present invention is to provide a liquid crystal display device that avoids complication of control and an increase in circuit scale and does not cause discomfort in display.

  The liquid crystal display device of the present invention includes, for example, a backlight having a plurality of light sources scattered at equal intervals on a surface facing the liquid crystal display panel, and the light sources can be controlled for each of a plurality of divided regions. In addition, the area has a shared area with another adjacent area, and the light source of the shared area includes a light source that is driven and controlled together with a light source in the area, and a light source that is driven and controlled together with a light source in the other area. It was made to become.

  The configuration of the present invention can be as follows, for example.

(1) A liquid crystal display device of the present invention includes, for example, a liquid crystal display panel to which an image signal is input, and a backlight having a plurality of light sources arranged on a surface facing the liquid crystal display panel. In
An illumination unit capable of controlling the light source for each of a plurality of regions;
A luminance distribution calculator that calculates the luminance distribution of the image signal corresponding to the plurality of regions and determines the brightness of the light source for each region;
An illumination control unit that controls the luminance of the light source for each area of the illumination unit based on the determination of the luminance distribution calculation unit,
The area has a shared area with another adjacent area, and the light source of the shared area includes a light source that is driven and controlled together with a light source in the area, and a light source that is driven and controlled together with a light source in the other area. It is characterized by.

(2) In the liquid crystal display device of the present invention, for example, in (1), in the shared area, the number of light sources that are driven and controlled together with the light sources in the region and the number of light sources that are driven and controlled together with the light sources in the other region Are driven with equality.

(3) The liquid crystal display device of the present invention is characterized in that, for example, in (3), the liquid crystal display device is driven with the luminance of the light source in the region being the same as the luminance of the light source in the other region.

(4) In the liquid crystal display device of the present invention, for example, in (1), in the shared area, the number of light sources that are driven and controlled together with the light sources in the region is reduced from the region to the other region. Driven to increase the number of light sources that are driven and controlled together with light sources in other regions.

(5) In the liquid crystal display device of the present invention, for example, in (4), the luminance of the light source in the region and the luminance of the light source in the other region are different.

(6) In the liquid crystal display device of the present invention, for example, in (1), the light source is a light emitting diode.

(7) The liquid crystal display device of the present invention includes, for example, a liquid crystal display panel to which an image signal is input, a light guide plate disposed opposite to the liquid crystal display panel, and at least a side wall surface of the light guide plate. In a liquid crystal display device comprising a backlight having a light source arranged in parallel,
An illumination unit capable of controlling the light source for each of a plurality of regions;
A luminance distribution calculator that calculates the luminance distribution of the image signal corresponding to the plurality of regions and determines the brightness of the light source for each region;
An illumination control unit that controls the luminance of the light source for each area of the illumination unit based on the determination of the luminance distribution calculation unit,
The area has a shared area with another adjacent area, and the light source of the shared area includes a light source that is driven and controlled together with a light source in the area, and a light source that is driven and controlled together with a light source in the other area. It is characterized by.

(8) In the liquid crystal display device of the present invention, for example, in (7), in the shared area, the number of light sources that are driven and controlled together with the light sources in the region and the number of light sources that are driven and controlled together with the light sources in the other region Are driven with equality.

(9) The liquid crystal display device of the present invention is, for example, characterized in that, in (8), the light source luminance in the region and the light source luminance in the other region are made the same.

(10) In the liquid crystal display device of the present invention, for example, in (7), the number of light sources that are driven and controlled together with the light sources in the region is reduced from the region to the other region in the shared area. Driven to increase the number of light sources that are driven and controlled together with light sources in other regions.

(11) In the liquid crystal display device of the present invention, for example, in (10), the luminance of the light source in the region is different from the luminance of the light source in the other region.

(11) In the liquid crystal display device of the present invention, for example, in (7), the light source is a light emitting diode.

  The above-described configuration is merely an example, and the present invention can be modified as appropriate without departing from the technical idea. Further, examples of the configuration of the present invention other than the above-described configuration will be clarified from the entire description of the present specification or the drawings.

  The liquid crystal display device configured as described above can achieve display without causing a sense of incongruity by avoiding complicated control and an increase in circuit scale.

  Other effects of the present invention will become apparent from the description of the entire specification.

  Embodiments of the present invention will be described with reference to the drawings. In each drawing and each example, the same or similar components are denoted by the same reference numerals and description thereof is omitted.

<Example 1>
FIG. 1 is a block diagram showing a liquid crystal display device according to a first embodiment of the present invention.

  In the figure, reference numeral 101 is display data input from an external device (not shown), and 102 is control of display data corresponding to the light emission amount of each divided area of the LED backlight (indicated by reference numeral 109 in the figure). Data conversion circuit to be performed, 103 is display data converted by the data conversion circuit 102, 104 is a liquid crystal display panel in which the amount of transmitted light of the LED backlight 109 is controlled for each pixel based on the display data 103, and 105 is in accordance with the display data 101 LED dimming signal generation circuit for generating control signals for each divided area in the LED backlight 109, 106 based on the dimming signal generated by the LED dimming signal generation circuit 105, and 107 based on the dimming signal 106. An LED drive voltage generation circuit 108 that generates an LED drive voltage, and 108 denotes an LED drive generated by the LED drive voltage generation circuit 107. Signal, 109 is an LED backlight LED drive is performed for each region.

  FIG. 2 is a perspective view showing the liquid crystal display panel 104 and the LED backlight 109. In FIG. 2, a liquid crystal display panel 104 includes a gate signal line GL extending in the x direction and juxtaposed in the y direction, and a drain signal line DL extending in the y direction and juxtaposed in the x direction. A pixel is formed in a region surrounded by a pair of adjacent gate signal lines GL and a pair of adjacent drain signal lines DL. The set of pixels constitutes the liquid crystal display area AR. Although not shown, each pixel region includes a thin film transistor. The thin film transistor is turned on by a scanning signal from the gate signal line GL, and a video signal from the drain signal line DL is passed through the turned on thin film transistor to a pixel electrode (not shown). Not supplied). The pixel electrode also generates an electric field for driving the liquid crystal between the pixel electrode and a counter electrode (not shown). Each gate signal line GL is supplied with the scanning signal from the scanning signal driving circuit V, and each drain signal line DL is supplied with a video signal from the video signal driving circuit He. . The scanning signal drive circuit V and the video signal drive circuit He are supplied with signals from the data conversion circuit 102 shown in FIG.

  The LED backlight 109 is composed of a surface light source that can illuminate at least the liquid crystal display area AR of the liquid crystal display panel 104, and the LEDs are equidistant from other LEDs adjacent to the surface of the insulating substrate INB on the liquid crystal display panel 104 side. Arranged in a matrix. The distance between these LEDs and other adjacent LEDs is configured to be greater than the distance between each adjacent pixel of the liquid crystal display panel 104, but this distance is closer to the distance of each pixel. Is preferred. This is because fine control is possible.

  FIG. 3 is a diagram showing drive control of each LED of the LED backlight 109, taking a 2 × 2 area of the LED backlight 109 as an example.

  Here, there are an area A and an area B that are divided in the x direction in the figure, the area B overlaps in a part of the area A on the area B side, and the area A overlaps in a part of the area B on the area A side. It is like that. Similarly, there are area 1 and area 2 divided in the y direction in the figure, area 2 overlaps in part of area 1 on area 2 side, and area 1 overlaps in part of area 2 on area 1 side. It is like that.

  Thereby, for example, area A1, area A2, area B1, and area B2 are formed, and each area A1, A2, B1, B2 is centered on its own area (hereinafter referred to as a unique area) and around it. It has an area shared with other adjacent areas (hereinafter referred to as a shared area).

  In this case, for example, when the case where the area A1 is turned on is considered, the LEDs belonging to the unique area can be turned on, and only the LEDs arranged every other LED belonging to the shared area can be turned on. By doing in this way, the area A1 is equivalent to the LEDs being densely arranged in the unique area and the LEDs are roughly arranged in the common area, the unique area is bright, and the common area is somewhat darkly illuminated. To be able to. This means that illumination similar to that described above can be performed when each of the areas A2, B1, and B2 is lit.

  For example, when considering the case where the area A1 and the area A2 are turned on, in the area A1, the LEDs belonging to the unique area are turned on, and the LEDs belonging to the shared area are turned on only every other LED arranged. In area A2, the LEDs belonging to the unique area are turned on, and the LEDs belonging to the shared area are turned on only for every other LED (other than the LEDs turned on in the shared area of area A1). Can be made. In this way, not only the unique area of area A1 and the unique area of area A2, but also the shared area located between the unique area of area A1 and the unique area of area A2 can be illuminated brightly. Then, in the unique area of the area A1, the unique area of the area A2, and other shared areas surrounding the shared area located between the unique area of the area A1 and the unique area of the area A2. Will be able to. This means that the same illumination as described above can be performed when the areas B1 and B2 or the areas A1 and B1 are lit.

  FIG. 4A is a diagram specifically showing LEDs in the LED backlights corresponding to area A, area B, area 1, and area 2 shown in FIG. The symbols in the drawing shown in FIG. 4A, that is, white circles, white triangles, white diamonds, and crosses indicate LEDs. Here, for example, in the lighting control of the LED in the unique area of the area A1 (indicated by a white circle in the figure), in the shared area around the unique area, the LEDs in the white areas in the figure are simultaneously displayed. Turned on or off. Similarly, in the lighting control of the LEDs (indicated by crosses in the figure) in the unique area of area A2, the LEDs at the locations indicated by the crosses in the figure are simultaneously turned on or off in the shared area around the unique area. Be controlled. Similarly, in the lighting control of the LED in the unique area of area B1 (indicated by a white triangle in the figure), in the shared area around the unique area, the LED at the location indicated by the white triangle in the figure is At the same time, it is controlled to turn on or off. Similarly, in the lighting control of the LEDs (indicated by white diamonds in the figure) in the unique area of the area B2, the LEDs at the locations indicated by white diamonds in the figure are shared in the shared area around the unique area. At the same time, it is controlled to turn on or off. In this case, for example, when the unique area of area A1 is turned on and the unique area of area A2 is turned off, the boundary (corresponding to the shared area portion) is displayed so that the luminance smoothly transitions. become. The same applies to the relationship between the unique area of area B1 and area B2, the relationship between the unique area of area A1 and the unique area of area B1, and the relationship between the unique area of area A2 and the unique area of area B2. .

  In the case of FIG. 4 (a), for example, in a shared area between the unique area of area A1 and the unique area of area A2, a case where LEDs are arranged in two rows from the area A1 side to the area A2 side is shown. . However, as shown in FIG. 4B, a larger number (six in FIG. 4B) may be arranged in parallel. In this case, in the shared area, an LED that can be controlled by following the LEDs in the unique area on both sides of the shared area can be arbitrarily selected, and thereby, multiple levels of luminance can be arbitrarily displayed. For example, when the LED rows are increased in parallel from the area A1 side to the area A2 side, for example, when the unique area of the area A1 is turned on and the unique area of the area A2 is turned off, the space between them In the shared area, by appropriately selecting the LED row to be lit, the luminance can be gradually reduced from the unique area of area A1 to the unique area of area A2.

  That is, as shown in FIG. 5, when there are a first area and a second area and 9 rows of LEDs are arranged in the shared area between them, for example, 2 to 4 rows from the first area to the second area. , 6, 7 and 9 rows of LEDs are controlled in the same way as the LEDs in the unique area on the first area side, and LEDs in the 1, 5 and 8 rows are controlled in the same way as the LEDs in the unique area on the second area side. can do. In this case, when the LED of the unique area on the first area side is turned on and the LED of the unique area on the second area side is turned off, the luminance is gradually reduced from the first area to the second area in the shared area. Can be.

  FIG. 6 shows that when a unique area of a certain area is turned on and a unique area of another area is turned off, a unique area of a certain area is selected by appropriately selecting the LED row to be turned on in the shared area between them. FIG. 9 corresponds to FIG. 9 as an application example in the case where the luminance is gradually reduced from the original area to another area.

  FIG. 5A shows a case where a white cursor having an area smaller than one area with respect to a black background is displayed on the liquid crystal display panel as in the case of FIG. Each LED in the area including the cursor is illuminated with a relative luminance of 1.

  Here, the difference from the case of FIG. 9A is that the portion illuminated with relative luminance of 1 is a unique area of the area. A shared area having a relatively large width exists around the unique area. This shared area is an area shared with each of the plurality of areas having a relative luminance of 0 arranged around the unique area of the area illuminated with a relative luminance of 1. In this shared area, LEDs having a plurality of columns are arranged from an area illuminated with a relative luminance of 1 to an area with a relative luminance of 0. In this column, the LED to be turned on and the LED to be turned off are appropriately selected. By arranging at an appropriate ratio, as shown in FIG. 5A, areas having relative luminance of 0.75, 0.5, and 0.25 from areas having relative luminance of 1 to areas having relative luminance of 0 are obtained. Can be formed. Therefore, as shown in FIG. 5B, on the display screen of the liquid crystal display panel, the background around the cursor (indicated by symbol C in the figure) gradually becomes darker as it goes outward from the cursor. Will be displayed. For this reason, the display quality can be achieved without causing the display to feel strange.

  FIG. 7 is a view showing another embodiment of the present invention and corresponds to FIG. In FIG. 7, the configuration different from FIG. 6 is that the light irradiation region having a relative luminance of 1 is almost rectangular as apparent from FIG. As in the case of FIG. 6, the relative luminance gradually decreases from the region toward the outside. Such an irradiation state of the LED backlight 109 is formed by two adjacent areas sharing a common area.

  That is, as shown in FIG. 7C, the luminance distribution of the area located on the left side in the figure is indicated by 71 in the figure, and the luminance distribution of the area located on the right side in the figure is indicated by reference numeral 72 in the figure. . Note that FIG. 7C is drawn in association with FIG. 7A in the horizontal direction. In the luminance distribution 71 of the area located on the left side in the figure, the luminance distribution is 1 in its own area, and the luminance distribution is 0.5 in the shared area around it. In the luminance distribution 72 of the area located on the right side in the figure, the luminance distribution is 1 in its own area, and the luminance distribution is 0.5 in the shared area around it. In this case, as shown by 73 in the figure, the luminance distribution is 1 in the shared area, and as shown in FIG. 7A, the light irradiation region having the relative luminance of 1 can be made substantially rectangular. Therefore, various shapes of regions having luminance distribution can be configured in combination with other areas.

  In each of the above-described configurations, the signal flow will be described based on FIG. 1 described above. In FIG. 1, display data 101 is input to a data conversion circuit 102 and an LED dimming signal generation circuit 105. In the LED dimming signal generation circuit 105, the LED backlight 109 performs so-called expansion conversion of the highest gray level of the display data for each area range shown in FIG. Conversion is performed so that the gamma characteristic of the display device is obtained. That is, when the maximum gradation that can be displayed by the display device is, for example, 255 gradations, the highest gradation in the area of the LED backlight is taken into account, and the display data is converted. Trying to get. At the same time, the LED dimming signal generation circuit 105 determines the light emission intensity of the LED in the area of the LED backlight 109 based on the light emission intensity of the LED at the maximum luminance. This is because the light transmitted through the liquid crystal display panel 104 obtains luminance corresponding to the input display data. By doing so, the display image can output the luminance corresponding to the input display data, and the luminance of the backlight can be lowered, so that the power consumption can be reduced.

  According to the liquid crystal display panel described above, as can be seen from the example shown in FIG. 3, for example, the LED controlled in the same manner as the LED in the unique area gradually decreases as the distance from the unique area increases. It has become. However, the LEDs are arranged at regular intervals on the surface of the LED backlight 109, and even when all the LEDs are turned on, there is an effect that the display can be performed with no luminance unevenness. Furthermore, as the distance from the unique area increases, the LED controlled in the same manner as the LED in the unique area is displayed mixed with the LED controlled in the same manner as the LED in the other unique area. For example, there is an effect that it becomes difficult to visually recognize the boundary between the lighting region and the non-lighting region without being clearly separated.

  As described above, for example, when a white cursor is displayed on a black background, if the cursor is positioned in a region where the corresponding LED is densely driven with respect to a certain area, it is output from the LED backlight. The amount of light can be gradually darkened around the pertinent area. As a result, the lighting area and the non-lighting area are not clearly separated and visually recognized as in the prior art. Therefore, a good display image can be obtained.

<Example 2>
Example 1 has a configuration in which an LED backlight is disposed directly below a liquid crystal display panel. However, the present invention can also be applied to a liquid crystal display device having a so-called side edge type backlight in which a plurality of LEDs are arranged on both sides of the light guide plate. FIG. 8 is a schematic diagram when the liquid crystal display device is viewed from the upper surface (observer side). A light guide plate (not shown) having the same shape and size as the liquid crystal display panel 602 is disposed on the back surface of the liquid crystal display panel 602, and a plurality of LEDs are disposed on both sides of the light guide plate. These LEDs are arranged on the insulating substrate 601 at equal intervals. Light from each LED is irradiated into the light guide plate from the side end surfaces of the side portions on both sides of the light guide plate, is totally reflected, and is irradiated to the liquid crystal display panel 602 from the surface facing the liquid crystal display panel 602. It is like that.

  As shown in the above-described embodiments, each LED is configured to be driven for each area, and a unique area where the LEDs are driven in a dense state and a shared area where the LEDs are driven in a rough state. Have come to have.

  In other words, white circles, white triangles, white diamonds, and cross marks indicating LEDs in the figure are controlled based on the same signal.

  Even in this case, it is possible to blur the areas. It becomes possible to obtain a display image with a little uncomfortable feeling.

  In the description of the first and second embodiments, neither LED color is described, but the present invention can also be applied to a backlight using a white LED and a backlight using three primary color LEDs of RGB.

  By applying this technique, when the dimming range of the backlight is divided into a plurality of areas, it is not desirable at a position corresponding to the boundary between adjacent divided backlight areas because it is greater than or less than the display data. It is possible to improve the problem that a luminance difference occurs and obtain a good display image.

It is a block diagram which shows the outline of a structure of the liquid crystal display device of this invention. It is the plane perspective view which showed the liquid crystal display panel and backlight of the liquid crystal display device of this invention. It is the top view which showed the arrangement | positioning of the LED of the said backlight, and the concept of drive control. It is the top view which showed specifically arrangement | positioning and drive control of LED of the said backlight. It is a top view which shows an example of the drive of LED in the common area in the area | region where the said backlight adjoins. It is a top view which shows an example of the luminance distribution of LED of the said backlight, and the display mode of a liquid crystal display panel. It is a top view which shows the luminance distribution of LED of the said backlight, and the other example of the display mode of a liquid crystal display panel. It is a schematic block diagram which shows the other Example of the liquid crystal display device of this invention. It is a schematic explanatory drawing which shows the structure of the principal part of the conventional liquid crystal display device. It is explanatory drawing which showed the disadvantage of the conventional liquid crystal display device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 ... Input display data, 102 ... Data conversion circuit, 103 ... Conversion display data, 104 ... Liquid crystal display panel, 105 ... LED dimming signal generation circuit, 106 ... Dimming signal, 107 ... LED drive Voltage generation circuit 108... LED drive signal 109... LED backlight 601.

Claims (12)

In a liquid crystal display device comprising: a liquid crystal display panel to which an image signal is input; and a backlight having a plurality of light sources arranged on a surface facing the liquid crystal display panel.
An illumination unit that controls the light source for each of a plurality of regions;
A luminance distribution calculator that calculates the luminance distribution of the image signal corresponding to the plurality of regions and determines the brightness of the light source for each region;
An illumination control unit that controls the luminance of the light source for each area of the illumination unit based on the determination of the luminance distribution calculation unit,
The area has a shared area with another adjacent area, and the light source of the shared area includes a light source that is driven and controlled together with a light source in the area, and a light source that is driven and controlled together with a light source in the other area. A liquid crystal display device.   The number of light sources that are driven and controlled together with the light sources in the area and the number of light sources that are driven and controlled together with the light sources in the other area are driven in the common area. Liquid crystal display device. 4. The liquid crystal display device according to claim 3, wherein the liquid crystal display device is driven with the luminance of the light source in the region and the luminance of the light source in the other region being the same.   In the shared area, from the region to the other region, the number of light sources that are driven and controlled together with the light sources in the region is decreased, and the number of light sources that are driven and controlled together with the light sources in the other region is increased. The liquid crystal display device according to claim 1, wherein the liquid crystal display device is driven.   The liquid crystal display device according to claim 4, wherein the luminance of the light source in the region is different from the luminance of the light source in the other region.   The liquid crystal display device according to claim 1, wherein the light source is a light emitting diode. A liquid crystal display panel to which an image signal is input; a light guide plate disposed to face the liquid crystal display panel; and a backlight having a light source arranged in parallel along at least one side wall surface of the light guide plate; In a liquid crystal display device comprising:
An illumination unit capable of controlling the light source for each of a plurality of regions;
A luminance distribution calculator that calculates the luminance distribution of the image signal corresponding to the plurality of regions and determines the brightness of the light source for each region;
An illumination control unit that controls the luminance of the light source for each area of the illumination unit based on the determination of the luminance distribution calculation unit;
The area has a shared area with another adjacent area, and the light source of the shared area includes a light source that is driven and controlled together with a light source in the area, and a light source that is driven and controlled together with a light source in the other area. A liquid crystal display device.   The number of light sources that are driven and controlled together with the light sources in the region and the number of light sources that are driven and controlled together with the light sources in the other region are driven in the common area. Liquid crystal display device. 9. The liquid crystal display device according to claim 8, wherein the liquid crystal display device is driven with the luminance of the light source in the region and the luminance of the light source in the other region being the same.   In the shared area, from the region to the other region, the number of light sources that are driven and controlled together with the light sources in the region is decreased, and the number of light sources that are driven and controlled together with the light sources in the other region is increased. The liquid crystal display device according to claim 7, wherein the liquid crystal display device is driven.   The liquid crystal display device according to claim 10, wherein a luminance of the light source in the region is different from a luminance of the light source in the other region.   The liquid crystal display device according to claim 7, wherein the light source is a light emitting diode.

Images