Control device for liquid crystal display device, liquid crystal display device, method for controlling liquid crystal display device, program, and storage medium for program
First Claim
1. A control device for controlling operations of a liquid crystal display device which includes a liquid crystal display panel and a backlight unit having a plurality of light sources arranged in a matrix manner in a backside of the liquid crystal display panel,said control device comprising:
- a liquid crystal control section which controls pixels of the liquid crystal display panel in accordance with plural pieces of divided image data, the plural pieces of divided image data being prepared by dividing image data for a single screen into pieces for respective ones of a plurality of display areas of the liquid crystal display panel;
a backlight control section which controls light-emitting states of respective ones of the plurality of light sources in accordance with undivided image data for a single screen;
a first dividing section which divides inputted image data for a single screen into the plural pieces of divided image data, the inputted image data having a first resolution which is at least a threshold resolution; and
a down-converting section which converts the first resolution of the inputted image data into a second resolution lower than the first resolution, the backlight control section including,a light source luminance setting section which determines light-emitting luminances of the respective ones of the plurality of light sources in accordance with the undivided image data for the single screen;
a light source driving section which causes the plurality of light sources to emit light in accordance with the respective light-emitting luminances determined by the light source luminance setting section; and
a luminance distribution data generating section which generates luminance distribution data indicative of luminance distribution caused in the liquid crystal display panel due to light emitted by the plurality of light sources, the plurality of light sources emitting the light according to the respective light-emitting luminances determined by the light source luminance setting section, the liquid crystal control section including,a compensating section which compensates the plural pieces of divided image data in accordance with the luminance distribution data; and
a liquid crystal driving section which drives the pixels of the liquid crystal display panel in accordance with the plural pieces of divided image data compensated by the compensating section,the light source luminance setting section being configured to determine the light-emitting luminances of the respective ones of the plurality of light sources in accordance with the second resolution of the inputted image data, andin accordance with the luminance distribution data, the compensating section being configured to compensate the plural pieces of divided image data prepared by the first dividing section.
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Abstract
A liquid crystal driving circuit controls operations of display areas in a liquid crystal display panel based on a plural pieces of divided image data which are prepared by dividing image data for a single screen in accordance with the display areas in the liquid crystal display panel. In response to an luminance signal corresponding to an LED resolution generated by an LED resolution signal generating circuit based on image data for a single screen which is not divided, the LED driving circuit controls operations of LEDs provided in a backlight unit. With the configuration of at least one embodiment, according to a liquid crystal display device including a backlight, in a case where display image data for a single screen is divided into a plural pieces of divided image data for a plurality of areas of a display screen and images to be displayed in the plurality of areas are controlled based on the plural pieces of divided image data, display quality in a border area of the plurality of areas can be improved.
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Citations
11 Claims
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1. A control device for controlling operations of a liquid crystal display device which includes a liquid crystal display panel and a backlight unit having a plurality of light sources arranged in a matrix manner in a backside of the liquid crystal display panel,
said control device comprising: -
a liquid crystal control section which controls pixels of the liquid crystal display panel in accordance with plural pieces of divided image data, the plural pieces of divided image data being prepared by dividing image data for a single screen into pieces for respective ones of a plurality of display areas of the liquid crystal display panel; a backlight control section which controls light-emitting states of respective ones of the plurality of light sources in accordance with undivided image data for a single screen; a first dividing section which divides inputted image data for a single screen into the plural pieces of divided image data, the inputted image data having a first resolution which is at least a threshold resolution; and a down-converting section which converts the first resolution of the inputted image data into a second resolution lower than the first resolution, the backlight control section including, a light source luminance setting section which determines light-emitting luminances of the respective ones of the plurality of light sources in accordance with the undivided image data for the single screen; a light source driving section which causes the plurality of light sources to emit light in accordance with the respective light-emitting luminances determined by the light source luminance setting section; and a luminance distribution data generating section which generates luminance distribution data indicative of luminance distribution caused in the liquid crystal display panel due to light emitted by the plurality of light sources, the plurality of light sources emitting the light according to the respective light-emitting luminances determined by the light source luminance setting section, the liquid crystal control section including, a compensating section which compensates the plural pieces of divided image data in accordance with the luminance distribution data; and a liquid crystal driving section which drives the pixels of the liquid crystal display panel in accordance with the plural pieces of divided image data compensated by the compensating section, the light source luminance setting section being configured to determine the light-emitting luminances of the respective ones of the plurality of light sources in accordance with the second resolution of the inputted image data, and in accordance with the luminance distribution data, the compensating section being configured to compensate the plural pieces of divided image data prepared by the first dividing section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9, 10, 11)
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8. A method for controlling a liquid crystal display device which includes a liquid crystal display panel and a backlight unit having a plurality of light sources arranged in a matrix manner in a backside of the liquid crystal display panel,
said method comprising the steps of: -
dividing inputted image data for a single screen into plural pieces of divided image data, the dividing divides the inputted image data for the single screen into pieces for respective ones of a plurality of display areas of the liquid crystal display panel, the inputted image data having at least a first resolution; controlling display states of the plurality of display areas in accordance with the plural pieces of divided image data; controlling light-emitting states of respective ones of the plurality of light sources in accordance with undivided image data for a single screen, the controlling the light-emitting states including, determining light-emitting luminances of the respective ones of the plurality of light sources in accordance with the undivided image data for the single screen; causing the plurality of light sources to emit light in accordance with the respective light-emitting luminances; and generating luminance distribution data indicative of luminance distribution caused in the liquid crystal display panel due to light emitted by the plurality of light sources, the plurality of light sources emitting the light according to the respective light-emitting luminances, the controlling the display states including, compensating the plural pieces of divided image data in accordance with the luminance distribution data; and driving the pixels of the liquid crystal display panel in accordance with the compensated plural pieces of divided image data; and converting the first resolution of the inputted image data into a second resolution lower than first resolution of the inputted image data, wherein the determining light-emitting luminances determines the light-emitting luminances of the respective ones the plurality of light sources in accordance with the second resolution of the inputted image data.
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Specification