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

A data-driven circuit and pixel data technology, applied to instruments, static indicators, etc., can solve the problems of limited power saving effect, high power consumption, and inability to effectively save energy.

Inactive Publication Date: 2010-07-14
NOVATEK MICROELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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,

Method used

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

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Embodiment Construction

[0019] figure 1 A block diagram of a data driving circuit of a flat display panel according to an embodiment of the invention is shown. The driving circuit can control the pixel data of a block window of the plane display panel and can process the pixel data to meet the boundary requirements of different block windows. In order to reduce power consumption, the data driving circuit 100 fetches pixel data of a plurality of pixels from the video data source once per clock of the clock signal CLK1 , so it can operate at a lower clock frequency.

[0020] The data driving circuit 100 includes: a data collection circuit 110 , a shift register 120 , an input register 130 , a data latch 140 , a digital-to-analog converter 150 , and an output buffer 160 . The data driving circuit 100 has at least two operation modes: one is a normal mode, and the other is a partial mode.

[0021] In the normal mode, the shift register 120 controls the pixel data of a plurality of pixels from the video...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): G09G3/20G09G3/36
Inventor 董佳欣
Owner NOVATEK MICROELECTRONICS CORP
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