Bit-plane pulse width modulated digital display system
First Claim
Patent Images
1. A digital-drive display system, comprising:
- a display substrate having a display substrate area;
an array of display pixels disposed on the display substrate in the display substrate area;
a display controller that provides a timing signal to every pixel in the array of display pixels at the same time, wherein each display pixel comprises;
a light emitter, anda pixel controller comprising a digital memory for storing a multi-digit digital pixel value and a drive circuit that drives the light emitter to emit light in response to the digital pixel value and to the timing signal, wherein the drive circuit provides a constant current independent of the stored digital pixel value that is supplied to the light emitter for a time period defined by the timing signal and corresponding to the value of the stored digital pixel value.
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Abstract
A digital-drive display system, comprising an array of display pixels, each display pixel having a light emitter, a digital memory for storing a digital pixel value, and a drive circuit that drives the light emitter in response to the digital pixel value. The drive circuit can respond to a control signal provided to all of the display pixels in common by a display controller that loads digital pixel values in the digit memory of each display pixel.
105 Citations
16 Claims
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1. A digital-drive display system, comprising:
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a display substrate having a display substrate area; an array of display pixels disposed on the display substrate in the display substrate area; a display controller that provides a timing signal to every pixel in the array of display pixels at the same time, wherein each display pixel comprises; a light emitter, and a pixel controller comprising a digital memory for storing a multi-digit digital pixel value and a drive circuit that drives the light emitter to emit light in response to the digital pixel value and to the timing signal, wherein the drive circuit provides a constant current independent of the stored digital pixel value that is supplied to the light emitter for a time period defined by the timing signal and corresponding to the value of the stored digital pixel value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for controlling a digital display system, comprising:
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providing an array of display pixels disposed on the display substrate in the display substrate area, wherein each display pixel comprises; a light emitter, and a pixel controller comprising a digital memory for storing a multi-digit digital pixel value and a drive circuit that drives the light emitter to emit light in response to the digital pixel value and to the timing signal, wherein the drive circuit provides a constant current independent of the stored digital pixel value that is supplied to the light emitter for a time period defined by the timing signal and corresponding to the value of the stored digital pixel value; providing a display controller for receiving an image having a digital pixel value for each image pixel in the image, each image pixel corresponding to a display pixel; and the display controller for loading the digital pixel values into the digital memory of the corresponding display pixel so that the drive circuit drives the light emitter to emit light in response to the digital pixel value stored in the digital memory.
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15. A method for controlling a digital display system, comprising:
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providing an array of display pixels disposed on the display substrate in the display substrate area, wherein each display pixel comprises; a light emitter, and a pixel controller comprising a digital memory for storing a multi-digit digital pixel value and a drive circuit that drives the light emitter to emit light in response to the digital pixel value and to the timing signal, wherein the drive circuit provides a constant current independent of the stored digital pixel value that is supplied to the light emitter for a time period defined by the timing signal and corresponding to the value of the stored digital pixel value; providing a display controller for controlling the display pixels that includes a loading circuit for loading the multi-digit digital pixel value in the digital memory of each display pixel and a control circuit for controlling a control signal connected in common to each display pixel, the display controller receiving an image having a multi-digit digital pixel value for each image pixel in the image, each image pixel corresponding to a display pixel; and the display controller repeatedly loading a different digit of each image pixel value into a corresponding display pixel and enabling the control signal for a period of time corresponding to the digit place of the loaded digit until all of the digits in the image pixel value have been loaded and enabled. - View Dependent Claims (16)
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Specification