Liquid crystal display adaptive to viewing angle
First Claim
1. A liquid crystal display (LCD) adaptive to a viewing angle, comprising:
- a driving voltage generator for generating first and second voltages based on an externally input power;
a voltage divider for converting a level of the first voltage based on the viewing angle of an LCD panel to generate a third voltage;
a viewing angle generator for generating information about the viewing angle based on the second and third voltages; and
a gamma curve determiner for selecting a liquid crystal gamma curve corresponding to received information about the viewing angle, and controlling a gray level with a gamma voltage value based on the selected liquid crystal gamma curve.
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Accused Products
Abstract
Disclosed is an LCD capable of adaptively selecting a gamma curve based on a viewing angle. The LCD includes: a viewing angle detector for detecting the viewing angle of an LCD panel to generate information about the viewing angle, and a gamma curve determiner for selecting a gamma curve corresponding to the information of the viewing angle and controlling the gray level with a gamma voltage value defined by the selected gamma curve. The viewing angle detector has a driving voltage generator and a voltage divider. The driving voltage generator outputs a gate-on/off voltage and an analog driving voltage based on an externally input power, and the voltage divider drops the level of the gate-on voltage to generate a first voltage. A viewing angle generator outputs information about the viewing angle based on the analog driving voltage and the first voltage.
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Citations
18 Claims
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1. A liquid crystal display (LCD) adaptive to a viewing angle, comprising:
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a driving voltage generator for generating first and second voltages based on an externally input power;
a voltage divider for converting a level of the first voltage based on the viewing angle of an LCD panel to generate a third voltage;
a viewing angle generator for generating information about the viewing angle based on the second and third voltages; and
a gamma curve determiner for selecting a liquid crystal gamma curve corresponding to received information about the viewing angle, and controlling a gray level with a gamma voltage value based on the selected liquid crystal gamma curve. - View Dependent Claims (2, 3, 4, 5)
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6. An LCD adaptive to a viewing angle, comprising:
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a driving voltage generator for generating first and second voltages based on an externally input power;
a decoder for decoding information of the viewing angle as received by operation of a user;
a voltage divider comprising a plurality of resistors, for selecting any one of the resistors based on the decoded information of the viewing angle, and converting a level of the first voltage based on the selected resistor to generate a third voltage;
a viewing angle generator for generating information about the viewing angle based on the second and third voltages; and
a gamma curve determiner for selecting a liquid crystal gamma curve corresponding to received information about the viewing angle, and controlling a gray level with a gamma voltage value based on the selected liquid crystal gamma curve. - View Dependent Claims (7)
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8. An LCD adaptive to a viewing angle, comprising:
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a driving voltage generator for generating a first voltage based on an externally input power;
a decoder for decoding information of the viewing angle as received by operation of a user;
a power selector comprising a plurality of voltage sources, for selecting any one of the voltage sources based on the decoded information of the viewing angle to generate a second voltage;
a viewing angle generator for generating information about the viewing angle based on the first and second voltages; and
a gamma curve determiner for selecting a liquid crystal gamma curve corresponding to the received information about the viewing angle, and controlling a gray level with a gamma voltage value based on the selected liquid crystal gamma curve. - View Dependent Claims (9)
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10. An LCD adaptive to a viewing angle, comprising:
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a driving voltage generator for generating an analog driving voltage based on an input power externally received via a first input;
a viewing angle generator for generating information about the viewing angle with a level of the analog driving voltage dropped based on the viewing angle, and feeding the level-dropped analog driving voltage back to a second input of the driving voltage generator; and
a gamma curve determiner for selecting a liquid crystal gamma curve corresponding to the received information about the viewing angle, and controlling a gray level with a gamma voltage value based on the selected liquid crystal gamma curve. - View Dependent Claims (11, 12, 14, 18)
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13. A notebook computer comprising:
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a variable resistor;
an LCD panel;
wherein the variable resistor varies voltage application to liquid crystals constituting the LCD panel, with voltage application being a function of visual field angle.
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15. A method for LCD gamma curve correction, comprising the steps of:
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plotting a plot of [(AVDD−
VCE+VBE)/(Von−
AVDD+VCE−
VBE)]×
R1,wherein AVDD is a first voltage generated as an analog driving voltage;
VCE is collector-emitter electrode voltage;
VBE is a base-emitter electrode voltage;
R1 is a resistor; and
adjusting an LCD gamma curve based on the plot.
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16. A method of reducing flicker for an LCD having a gamma curve, comprising the steps of:
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plotting a plot of [(AVDD−
VCE+VBE)/(Von−
AVDD+VCE−
VBE)]×
R1, wherein AVDD is a first voltage generated as an analog driving voltage;
VCE is collector-emitter electrode voltage;
VBE is a base-emitter electrode voltage;
R1 is a resistor; and
adjusting the LCD gamma curve based on the plot.
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17. A method of enhancing user visibility of a notebook computer comprising an LCD panel, comprising at least the steps of:
(a) varying voltage application to liquid crystals, wherein amount of voltage applied is a function of visual field angle.
Specification