Display defect compensation with localized backlighting
First Claim
1. An electronic device comprising:
- a backlight unit configured to provide illumination across a viewable display area of the electronic device, the viewable display area comprising a plurality of zones, the plurality of zones being arranged in a regular zone arrangement;
a liquid crystal layer disposed proximate to the backlight unit, the liquid crystal layer configured to selectively filter the illumination provided by the backlight unit; and
a processor coupled to the backlight unit and to the liquid crystal layer, the processor configured to determine, based on local frame data indicative of content to be displayed, a local backlight brightness level of each zone of the plurality of zones and to generate liquid crystal control signaling for the liquid crystal layer,wherein the processor is further configured to adjust with a first adjustment, based on data indicative of content to be displayed, a respective backlight brightness level of each zone of the plurality of zones and to generate control signaling for the liquid crystal panel;
wherein the processor is further configured, in addition to the first adjustment, to adjust with a second adjustment the respective backlight brightness levels and the liquid crystal control signaling to compensate for distortions arising from defects in the backlight unit and the liquid crystal layer, the defects otherwise resulting in a dimmer region of the viewable display area and a non-uniformity of display intensity.
1 Assignment
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Accused Products
Abstract
An electronic device includes a backlight unit and a liquid crystal layer disposed proximate to the backlight unit. The backlight unit is configured to provide illumination across a viewable display area of the electronic device. The viewable display area includes a plurality of zones. The liquid crystal layer is configured to selectively filter the illumination provided by the backlight unit. A processor is coupled to the backlight unit and to the liquid crystal layer. The processor is configured to determine, based on data indicative of content to be displayed, a respective backlight brightness level of each zone of the plurality of zones and to generate liquid crystal control signaling for the liquid crystal layer. The processor is further configured to adjust the respective backlight brightness levels and/or the liquid crystal control signaling, to compensate for distortions arising from defects in the backlight unit and/or the liquid crystal layer.
16 Citations
21 Claims
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1. An electronic device comprising:
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a backlight unit configured to provide illumination across a viewable display area of the electronic device, the viewable display area comprising a plurality of zones, the plurality of zones being arranged in a regular zone arrangement; a liquid crystal layer disposed proximate to the backlight unit, the liquid crystal layer configured to selectively filter the illumination provided by the backlight unit; and a processor coupled to the backlight unit and to the liquid crystal layer, the processor configured to determine, based on local frame data indicative of content to be displayed, a local backlight brightness level of each zone of the plurality of zones and to generate liquid crystal control signaling for the liquid crystal layer, wherein the processor is further configured to adjust with a first adjustment, based on data indicative of content to be displayed, a respective backlight brightness level of each zone of the plurality of zones and to generate control signaling for the liquid crystal panel; wherein the processor is further configured, in addition to the first adjustment, to adjust with a second adjustment the respective backlight brightness levels and the liquid crystal control signaling to compensate for distortions arising from defects in the backlight unit and the liquid crystal layer, the defects otherwise resulting in a dimmer region of the viewable display area and a non-uniformity of display intensity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A display comprising:
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a backlight unit comprising a plurality of planar emission devices, the plurality of planar emission devices arranged to provide illumination across a plurality of zones, the plurality of zones collectively defining a viewable display area of the electronic device; a liquid crystal panel disposed adjacent the backlight unit, the liquid crystal panel configured to selectively filter the illumination provided by the backlight unit; and a processor coupled to the backlight unit and to the liquid crystal panel, the processor configured to adjust with a first adjustment, based on data indicative of content to be displayed, a respective backlight brightness level of each zone of the plurality of zones and to generate control signaling for the liquid crystal panel; wherein the processor is further configured, after the first adjustment, to adjust with a second adjustment the respective backlight brightness levels and the liquid crystal control signaling to compensate for distortions arising from defects in the backlight unit and the liquid crystal layer, the defects otherwise resulting in a dimmer region of the viewable display area and a non-uniformity of display intensity. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. An electronic device comprising:
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a backlight unit configured to provide illumination across a viewable display area of the electronic device, the viewable display area comprising a plurality of zones, the plurality of zones being arranged in a regular zone arrangement; a liquid crystal panel disposed adjacent the backlight unit, the liquid crystal panel configured to selectively filter the illumination provided by the backlight unit; a memory in which backlight unit drive instructions, liquid crystal control instructions, and distortion compensation instructions are stored; a processor coupled to the backlight unit and to the liquid crystal panel, the processor configured to execute the backlight unit instructions to adjust with a first adjustment, based on frame data local to a local zone of the plurality of zones, a local backlight brightness level of the local zone; wherein the processor is configured to execute the liquid crystal control instructions to generate liquid crystal control signaling for the liquid crystal panel; wherein the processor is configured to execute the distortion compensation instructions to adjust with a second adjustment the local backlight brightness levels and the liquid crystal control signaling to compensate for distortions arising from defects in the backlight unit and the liquid crystal layer, the defects otherwise resulting in a dimmer region of the viewable display area and a non-uniformity of display intensity, wherein the second adjustment occurs after the first adjustment. - View Dependent Claims (20, 21)
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Specification