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A LCD data write-in control method and first in and first out memory

A control method and data writing technology, applied in the multimedia field, can solve the problems of reducing data reading speed and efficiency, and achieve the effect of simple realization

Active Publication Date: 2009-06-24
ANYKA (GUANGZHOU) MICROELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] When this scheme implements picture-in-picture, a row of images can only be read out after being synthesized in the asynchronous FIFO, which reduces the speed and efficiency of data reading

Method used

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  • A LCD data write-in control method and first in and first out memory

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Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0027] In the embodiment of the present invention, the second channel start signal is received during the process of receiving the first channel data, wherein the second channel start signal identifies the data input address of the second channel, and when the first channel end signal is received, from the The address identified by the second channel start signal is written into the data of the second channel, and during the process of writing into the second channel, the data of the first channel and the already written data of the second channel are read out.

[0028] image 3 The structure of t...

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Abstract

The present invention is applicable to the field of multimedia technology, and provides an LCD data writing control method and a first-in-first-out memory. The method includes: in the process of writing data in the first channel, receiving a second channel start signal, and the The second channel start signal is used to identify the address that starts to input the second channel data; when the data input of the first channel ends, the first channel end signal is received, and the address identified by the second channel start signal is written into the second channel simultaneously. The data of the channel; in the process of inputting the second channel, read the data of the first channel and the data of the second channel already input. The invention solves the problem of low data reading speed and efficiency in the prior art when realizing the LCD picture-in-picture function.

Description

technical field [0001] The invention belongs to the field of multimedia technology, in particular to an LCD data writing control method and a first-in-first-out memory. Background technique [0002] With the continuous maturity and development of mobile multimedia technology, a liquid crystal display (Liquid Crystal Display, LCD) as a main display component has also been more widely used. At present, the mainstream LCD interfaces mainly include microprocessor (MICRO PROCESSER UNIT, MPU) interface and red green blue (Red Green Blue, RGB) interface. [0003] The LCD driver chip of the MPU interface has a cache that can store one frame of image data inside, so the requirements for the LCD controller are not high, but for the LCD driver chip of the RGB interface, because there is no such a cache inside, At the same time, it is required to achieve a refresh rate of nearly 60 frames per second, so the performance requirements for the LCD controller are very high. figure 1 It sho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G09G3/20
Inventor 施景华赵冰茹梁远亮
Owner ANYKA (GUANGZHOU) MICROELECTRONICS TECH CO LTD