Data driving circuit having block mode and method for processing pixel data of block window

Abstract

The invention relates to a data driving circuit of a flat display panel having a block mode and a method for processing pixel data of a block window. The data driving circuit comprises an input register and a data collecting circuit. When the data driving circuit is in the block mode, the data collecting circuit is used for determining whether to temporarily store the pixel data of a plurality of pixels in the pixel data of the block window sequentially read from a data region in the data collecting circuit according to the boundary of the block window and a scanning count value. When the scanning count value represents that the block window is to be displayed, the data collecting circuit selects the pixel data from the temporarily stored pixels and generates the pixel data with the plurality of pixels accordingly to the input register to sequentially output the pixel data of the block window and drive the flat display panel to display the block window.

Description

technical field [0001] The present invention relates to a pixel data processing method and a driving circuit of a flat display panel, and in particular to a pixel data processing method and a data driving circuit of a block window of a flat display panel. Background technique [0002] For the source driver of a general liquid crystal display panel, there will be a data latch (latch) to provide the digital pixel data of a certain column of pixels in the pixel array to the digital-to-analog converter to convert it into an analog display signal to drive the columns of pixels. In addition, the data latch retrieves the pixel data of a row from a data source, such as a memory, through the shift register and the input register, transmits the pixel data to the input register for storage, and then outputs it to the data latch. In this process, the existing method is to fetch the data of one pixel into the input register once per clock. [0003] However, in a high-resolution display...

AI Technical Summary

Problems solved by technology

[0003] However, in high-resolution display panels, existing methods require higher-speed clocks to capture digital pixel data

For the operation of some liquid crystal display panels displaying information through partial windows in order to save energy, the above-mentioned existing methods cannot effectively save energy

Taking a small-sized panel of a handheld device, such as a liquid crystal display panel with a resolution of 480x864, as an example, when the scanning frequency is 60Hz, a high-frequency clock of about 25MHz is required to control the reading of each pixel data. The pulse frequency is high, and the relative power consumption is also large

In the case of limited battery life of the handheld device, the existing driving method and structure also limit the power saving effect that can be generated through the block window

[0004] In addition, traditionally, when the driving circuit of the liquid crystal display panel controls the block window to display area data, it is easily affected by the structure of the above-mentioned data latch that is limited to the driving circuit, so that the left and right boundaries cannot be set arbitrarily, which is relatively difficult in application. not elastic

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