Display device and pixel control method

Abstract

Perform color correction using a simpler method. [Solution] A display device comprising: three LED chips, each emitting light corresponding to the RGB colors that constitute a pixel; three LED drivers, each outputting a drive current to the three LED chips; and an adjustment circuit that adjusts the amount of the drive current to a current corresponding to the luminous efficiency of each of the three LED chips by adjusting the voltage applied to each of the three LED drivers.

Claims

1. Three LED chips, each emitting light corresponding to the RGB colors that make up the pixel, Three LED drivers that output drive current to the three colored LED chips, Three adjustment circuits adjust the current amount of the drive current to correspond to the luminous efficiency of each of the three colored LED chips by adjusting the voltage applied to each of the three LED drivers, A display device equipped with the following features.

2. The display device according to claim 1, wherein the three adjustment circuits generate a voltage applied to each of the three LED drivers by adjusting the brightness voltage that instructs the brightness of the pixels.

3. The display device according to claim 2, wherein the three adjustment circuits generate the voltage applied to each of the three LED drivers by dividing the brightness voltage using a resistive voltage divider.

4. The system further includes a logic circuit that outputs data signals to control the brightness of each of the three colored LED chips to the three LED drivers. The display device according to any one of claims 1 to 3, wherein the three LED drivers each generate the drive current based on the data signal.

5. The display device according to claim 4, wherein one logic circuit is provided for each of the plurality of pixels.

6. Each of the three LED chips includes an LED that emits ultraviolet light and a phosphor that converts the ultraviolet light into light corresponding to each of the RGB colors. The display device according to any one of claims 1 to 3, wherein the luminous efficiency of each of the three color LED chips is determined based on the conversion efficiency of the phosphor contained in each.

7. A pixel control method in which three LED drivers control three LED chips, each emitting light corresponding to the RGB colors that constitute a pixel, The voltage applied to each of the three LED drivers is adjusted by an adjustment circuit to adjust the amount of drive current output to the three color LED chips to a current amount corresponding to the luminous efficiency of each of the three color LED chips. A pixel control method, including the following.

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