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US 11,443,679 B1Granted
Display device and display method
AssigneeAu Optronics Corporation
InventorsPei-Fen Lai, Hung-Chi Wang, Ya-Fang Chen, Chih-Hsiang Yang
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Abstract
A display device and a display method are provided. The display device includes a board, a sensing circuit, and a feedback control circuit. The board includes a display array formed by a plurality of pixels. The sensing circuit includes a test pixel and a light sensor. The light sensor receives light emitted by the test pixel to generate a corresponding sensing signal. The feedback control circuit receives the sensing signal and generates a pulse width adjusting signal to adjust a pulse width at which the pixels are operated for display.
Claims8
A display device comprising:
- a first board comprising a display array formed by a plurality of pixels;
- a sensing circuit comprising a test pixel and a light sensor, wherein the light sensor receives light emitted by the test pixel to generate a corresponding sensing signal;
- and
- a feedback control circuit receiving the sensing signal and generating a pulse width adjusting signal to adjust a pulse width at which the pixels are operated for display,
- wherein the feedback control circuit comprises:
- an arithmetic circuit coupled to the sensing circuit, wherein the arithmetic circuit calculates a brightness decay value according to the sensing signal and reference brightness information;
- a pulse width compensation circuit coupled to the arithmetic circuit, wherein the pulse width compensation circuit calculates the pulse width adjusting signal according to the brightness decay value;
- an interface circuit coupled to the sensing circuit, wherein the interface circuit receives the sensing signal;
- a filter coupled to the interface circuit, wherein the filter filters out noise in the sensing signal;
- an analog-to-digital converter coupled between the filter and the arithmetic circuit, wherein the analog-to-digital converter provides the filtered sensing signal to the arithmetic circuit for calculation;
- and
- a transceiver coupled to the pulse width compensation circuit, the arithmetic circuit, and a microcontroller, wherein the transceiver provides the pulse width adjusting signal calculated by the pulse width compensation circuit to the microcontroller, and the transceiver receives the reference brightness information from the microcontroller and provides the reference brightness information to the arithmetic circuit.
9 more elements
A display method comprising:
- providing a display array formed by a plurality of pixels to perform display;
- providing a sensing circuit, and receiving, by a light sensor of the sensing circuit, light emitted by a test pixel of the sensing circuit to generate a corresponding sensing signal;
- and
- receiving, by a feedback control circuit, the sensing signal and generating a pulse width adjusting signal to adjust a pulse width at which the pixels are operated for display,
- wherein the feedback control circuit comprises:
- an arithmetic circuit coupled to the sensing circuit, wherein the arithmetic circuit calculates a brightness decay value according to the sensing signal and reference brightness information;
- a pulse width compensation circuit coupled to the arithmetic circuit, wherein the pulse width compensation circuit calculates the pulse width adjusting signal according to the brightness decay value;
- an interface circuit coupled to the sensing circuit, wherein the interface circuit receives the sensing signal;
- a filter coupled to the interface circuit, wherein the filter filters out noise in the sensing signal;
- an analog-to-digital converter coupled between the filter and the arithmetic circuit, wherein the analog-to-digital converter provides the filtered sensing signal to the arithmetic circuit for calculation;
- and
- a transceiver coupled to the pulse width compensation circuit, the arithmetic circuit, and a microcontroller, wherein the transceiver provides the pulse width adjusting signal calculated by the pulse width compensation circuit to the microcontroller, and the transceiver receives the reference brightness information from the microcontroller and provides the reference brightness information to the arithmetic circuit.
9 more elements
Dependencies are inferred from the claim text.