RGBW DISPLAY APPARATUS AND CONTROL METHOD THEREOF
First Claim
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1. A four-primary-color display apparatus comprising:
- a four-color mapping unit for receiving a plurality of three-color image input signals and generating a plurality of corresponding mapping scale ratios and thereby generating a plurality of corresponding four-color image output signals, wherein each of the four-color image output signals comprises a first color signal, a second color signal, a third color signal and a white color signal;
a dynamic backlight control unit electrically connected to the four-color mapping unit and for receiving and computing the mapping scale ratios and thereby outputting a backlight adjust signal and a white color signal adjust ratio, wherein the four-color mapping unit adjusts the white color signal to be an updated white color signal according to the white color signal adjust ratio;
a backlight module electrically connected to the dynamic backlight control unit and for receiving the backlight adjust signal and thereby generating a backlight output intensity;
a source driver electrically connected to the four-color mapping unit and for receiving the first color signal, the second color signal, the third color signal and the updated white color signal and thereby generating a plurality of data signals; and
a pixel array electrically connected to the source driver and for displaying an image according to the data signals and the backlight output intensity.
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Abstract
In an exemplary RGBW display apparatus, a plurality of four-color image output signals and a plurality of mapping scale ratios are generated according to a plurality of three-color image input signals. Furthermore, a backlight output intensity outputted from a backlight module is dynamically adjusted according to the mapping scale ratios and a white color signal adjust ratio is generated. In addition, a white color signal in each of the four-color image output signals is adjusted to be an updated white color signal according to the white color signal adjust ratio.
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Citations
15 Claims
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1. A four-primary-color display apparatus comprising:
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a four-color mapping unit for receiving a plurality of three-color image input signals and generating a plurality of corresponding mapping scale ratios and thereby generating a plurality of corresponding four-color image output signals, wherein each of the four-color image output signals comprises a first color signal, a second color signal, a third color signal and a white color signal; a dynamic backlight control unit electrically connected to the four-color mapping unit and for receiving and computing the mapping scale ratios and thereby outputting a backlight adjust signal and a white color signal adjust ratio, wherein the four-color mapping unit adjusts the white color signal to be an updated white color signal according to the white color signal adjust ratio; a backlight module electrically connected to the dynamic backlight control unit and for receiving the backlight adjust signal and thereby generating a backlight output intensity; a source driver electrically connected to the four-color mapping unit and for receiving the first color signal, the second color signal, the third color signal and the updated white color signal and thereby generating a plurality of data signals; and a pixel array electrically connected to the source driver and for displaying an image according to the data signals and the backlight output intensity. - View Dependent Claims (2, 3, 4, 5)
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6. A control method of a four-primary-color display apparatus comprising steps of:
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receiving a plurality of three-color image input signals; generating a plurality of mapping scale ratios and a plurality of four-color image output signals according to a pre-mapping lookup table and the three-color image input signals, wherein each of the four-color image output signals comprises a first color signal, a second color signal, a third color signal and a white color signal; computing the mapping scale ratios and thereby outputting a backlight adjust signal and a white color signal adjust ratio; controlling a backlight module to generate a backlight output intensity according to the backlight adjust signal; adjusting the white color signal to be an updated white color signal according to the white color signal adjust ratio; and displaying an image on a pixel array according to the backlight output intensity and the first color signal, the second color signal, the third color signal and the updated white-color signal. - View Dependent Claims (7)
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8. A four-primary-color display apparatus comprising:
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a four-color mapping unit for receiving a plurality of three-color image input signals and generating a plurality of four-color image output signals, wherein each of the four-color image output signals comprises a first color signal, a second color signal, a third color signal and a white color signal; a saturation mapping unit for receiving the three-color image input signals and mapping the received three-color image input signals to be a plurality of saturation values; a dynamic backlight control unit electrically connected to the saturation mapping unit and for receiving and computing the saturation values and thereby outputting a backlight adjust signal and a white color signal adjust ratio, wherein the four-color mapping unit adjusts the white color signal to be an updated white color signal according to the white color signal adjust ratio; a backlight module electrically connected to the dynamic backlight control unit and for receiving the backlight adjust signal and thereby generating a backlight output intensity; a source driver electrically connected to the four-color mapping unit and for receiving the first color signal, the second color signal, the third color signal and the updated white color signal outputted from the four-color mapping unit and thereby generating a plurality of data signals; and a pixel array electrically connected to the source driver and for displaying an image according to the data signals and the backlight output intensity. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A control method of a four-primary-color display apparatus comprising steps of:
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receiving a plurality of three-color image input signals; mapping the three-color image input signals to be a plurality of four-color image output signals according to a pre-mapping lookup table, wherein each of the four-color image output signals comprises a first color signal, a second color signal, a third color signal and a white color signal; mapping the three-color image input signals to be a plurality of saturation values; computing the saturation values and thereby outputting a backlight adjust signal and a white color signal adjust ratio; controlling a backlight module to generate a backlight output intensity according to the backlight adjust signal; adjusting the white color signal to be an updated white color signal according to the white color signal adjust ratio; and displaying an image on a pixel array according to the backlight output intensity and the first color signal, the second color signal, the third color signal and the updated white color signal. - View Dependent Claims (15)
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Specification