Planar display device data drive and the driving method

Abstract

The invention discloses a data driver, which comprises the following parts: input buffer memory, slope signal unit, meter and switch element, wherein the input buffer memory outputs most significant bit of N-bit digit image data and residual N-1 bit through controlling signal; the slope signal unit generates a slope signal according to the most significant bit; the meter counts the time pulse, which generates a control signal of switch element after the N-1 time pulse metering time; the switch element transmits the level of slope signal to dataline in the plane display device according to thecontrol signal of switch element.

Description

technical field [0001] The present invention relates to a data driver for a flat panel display device, and in particular to a data driver capable of generating different ramp signals according to specific bits of digital image data and a driving method thereof. Background technique [0002] With the advancement of science and technology, Flat Panel Display (FPD), which has the advantages of high image quality, small size, light weight, low voltage drive, and low power consumption, has been widely used in display devices of electronic products, and has become Mainstream display. For example: consumer electronics or computer products such as portable TVs, mobile phones, camcorders, notebook computers, desktop monitors, and projection TVs. [0003] The flat panel display device uses a source driver (Source Driver), also known as a data driver (Data Driver), to convert digital signals (ie, image data) into analog potential values ​​for transmission to the display unit on the fl...

AI Technical Summary

Problems solved by technology

[0007] This technique of obtaining the analog voltage of the digital image data from the ramp signal requires more clocks when the digital image data corresponds to a high analog voltage because the ramp signal climbs from a low voltage to a high voltage each time. The counting time enables the ramp signal to ramp up to a high voltage, which would require a longer full-page image time (frame time)

Moreover, when dealing with a large amount of data in high-resolution images, this technology generally must use a ramp signal generator with a faster ramp rate

However, this kind of fast ramp signal generator will not only increase the design and manufacturing costs, but also the accuracy of its output analog voltage is not good

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