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Liquid crystal display (LCD) controller and control method thereof

A control method and controller technology, applied in the direction of instruments, static indicators, etc., can solve the problems of inflexible control mode and high cost of LCD display, and achieve the effect of convenient control of electromagnetic interference, low cost and high reliability

Active Publication Date: 2012-10-17
AEROSPACE INFORMATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The main purpose of the present invention is to provide a kind of LCD controller and its control method, which overcomes the defects of high cost and inflexible control mode of the existing LCD display part, reduces the cost of the LCD part of the tax control machine, and improves the cost of this part at the same time. Stability, reliability, and more flexible control methods

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  • Liquid crystal display (LCD) controller and control method thereof
  • Liquid crystal display (LCD) controller and control method thereof
  • Liquid crystal display (LCD) controller and control method thereof

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Embodiment Construction

[0044] The above and other technical features and advantages of the present invention will be described in more detail below in conjunction with the accompanying drawings.

[0045] Such as figure 1 As shown, it is a schematic diagram of the composition of the LCD controller of the present invention. The LCD controller of the present invention includes a microprocessor 1 and an LCD control logic 2. The LCD control logic 2 is connected to the microprocessor 1 through the SPI interface. Realize the control of LCD3, wherein the LCD control logic 2 is a programmable logic device.

[0046] Wherein, the LCD control logic 2 is connected with the microprocessor 1 through three signal lines, these three signal lines are respectively the data signal line MOSI of the SPI interface, the clock signal line SPCK and the display data frame synchronization signal FRAMESYNC, wherein , showing that the data frame synchronization signal FRAMESYNC is connected to a certain I / O port of the micropro...

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Abstract

The invention provides a liquid crystal display (LCD) controller and a control method thereof. The LCD controller comprises a microprocessor and an LCD control logic, wherein the LCD control logic is connected with the microprocessor through a serial peripheral interface (SPI) to realize the control of an LCD; and the LCD control logic is a programmable logic device. The microprocessor transmits display data to a complex programmable logic device (CPLD) through the SPI interface in a direct memory access (DMA) control mode; and the CPLD device generates required pixel clock signals, line synchronizing signals and frame synchronizing signals according to a timing sequence requirement of the LCD by using data signals and clock signals of the SPI interface so as to drive the LCD to display.

Description

technical field [0001] The invention relates to a liquid crystal display (LCD) controller, in particular to an LCD controller and a control method thereof. Background technique [0002] Due to its ultra-thin size, high brightness and high definition, LCD is widely used in industrial equipment and consumer products to realize image interface display. Especially in the application of embedded systems, since most embedded systems have strict requirements on volume, ultra-thin LCDs have become the best choice for most embedded systems. [0003] For embedded systems, the existing LCD display control solutions mainly include: [0004] 1) Use a dedicated LCD control chip. Such as SED1335 of Beijing Jingdian Pengyuan Display Technology Co., Ltd., SID13774 of Japan's Epson Corporation (EPSON), etc. These chips can support LCD display functions of various signals, and also provide a wealth of controller interfaces, but the setting and programming of these chips are relatively compl...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36
Inventor 陈懿张玉魁陈皓贾希强董建华王克俭范立波张福军李宁
Owner AEROSPACE INFORMATION