METHOD AND APPARATUS FOR REDUCING ERRONEOUS COLOR EFFECTS IN A FIELD SEQUENTIAL LIQUID CRYSTAL DISPLAY
First Claim
1. An apparatus for reducing an erroneous color effect in a field-sequential liquid crystal display (FSLCD), the apparatus comprising:
- a data response time compensation (RTC) block configured to receive sequential display signals, wherein the data RTC block is also configured to use an RTC lookup table to provide a fast transition response time from one gray level to another gray level for a liquid crystal pixel cell by using a response time compensation (RTC) scheme during a color LED backlighting sequence;
a VCOM and Gamma reference control block configured to generate a voltage boost and provide boost control to the liquid crystal pixel cell in a FSLCD panel operatively connected to the VCOM and Gamma reference control block, wherein the voltage boost gives a fast gray level transition to remove residual color caused by a slow transition time between liquid crystal light transmittance levels for the liquid crystal pixel cell; and
an output interface for the RTC block and/or the VCOM and Gamma reference control block, wherein the output interface is configured to transmit manipulated sequential display data from the RTC block and/or the output interface is configured to transmit a boosted voltage control signal from the VCOM and Gamma reference control block.
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Accused Products
Abstract
Methods and apparatuses for reducing an erroneous color effect in a field-sequential liquid crystal display (FSLCD) are disclosed. An apparatus for reducing the erroneous color effect may include a data response time compensation (RTC) block which uses an RTC lookup table to provide a fast transition response time from one gray level to another gray level for a liquid crystal pixel cell by using a response time compensation (RTC) scheme during a color LED backlighting sequence. The apparatus may also include a VCOM and Gamma reference control block to generate a voltage boost and provide boost control to the liquid crystal pixel cell in a FSLCD panel, wherein the voltage boost gives a fast gray level transition to remove residual color caused by a slow transition time between liquid crystal light transmittance levels for the liquid crystal pixel cell.
46 Citations
20 Claims
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1. An apparatus for reducing an erroneous color effect in a field-sequential liquid crystal display (FSLCD), the apparatus comprising:
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a data response time compensation (RTC) block configured to receive sequential display signals, wherein the data RTC block is also configured to use an RTC lookup table to provide a fast transition response time from one gray level to another gray level for a liquid crystal pixel cell by using a response time compensation (RTC) scheme during a color LED backlighting sequence; a VCOM and Gamma reference control block configured to generate a voltage boost and provide boost control to the liquid crystal pixel cell in a FSLCD panel operatively connected to the VCOM and Gamma reference control block, wherein the voltage boost gives a fast gray level transition to remove residual color caused by a slow transition time between liquid crystal light transmittance levels for the liquid crystal pixel cell; and an output interface for the RTC block and/or the VCOM and Gamma reference control block, wherein the output interface is configured to transmit manipulated sequential display data from the RTC block and/or the output interface is configured to transmit a boosted voltage control signal from the VCOM and Gamma reference control block. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 16, 17, 18, 19)
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13. An apparatus for reducing an erroneous color effect in a field-sequential liquid crystal display (FSLCD), the apparatus comprising:
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a data response time compensation (RTC) block configured to receive sequential display signals, wherein the data RTC block is also configured to use an RTC lookup table to provide a fast transition response time from one gray level to another gray level for a liquid crystal pixel cell by using a response time compensation (RTC) scheme during a color LED backlighting sequence; and an output interface for the RTC block, wherein the output interface is configured to transmit manipulated sequential display data from the RTC block. - View Dependent Claims (14, 15)
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20. A method for reducing an erroneous color effect in a field-sequential liquid crystal display (FSLCD), the method comprising steps of:
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receiving one or more sequential display signals in a data response time compensation (RTC) block; accessing an RTC lookup table from the RTC block to retrieve an RTC gray level command value based on a previous gray level command value to a pixel and a current gray level command value to the pixel; generating one or more manipulated sequential display data using the RTC gray level command value, wherein the one or more manipulated sequential display data are eventually transmitted to the FSLCD; and generating one or more boosted VCOM voltage control signals and/or one or more Gamma reference voltage control signals to provide a fast gray level transition to remove residual color caused by an insufficiently-slow liquid crystal light transmittance level transition of the pixel, wherein the one or more boosted VCOM voltage control signals and/or one or more Gamma reference voltage control signals are eventually transmitted to the FSLCD.
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Specification