LCD graphical display controller and control method

A graphic display and control method technology, applied in static indicators, instruments, etc., can solve the problems of increasing system cost, complicated setting and programming, and high cost of PC, and achieve the effect of convenient switching and erasing

Inactive Publication Date: 2008-12-03
XI AN JIAOTONG UNIV
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Problems solved by technology

However, these chips are mainly used for CPUs above 16 bits, and the setting and programming are more complicated
Especially in terms of graphic functions, such as realizing the superposition of graphics and switching between different graphics, it is relatively lacking
At the same time, it is constrained by hardware packaging, size and cost
2) Use a SOC chip with a liquid crystal display controller, such as the S3C2410 ARM chip of South Korea's Samsung (SUMSANG). Although this type of chip has a high degree of integration and rich functions, it supports fewer types of interfaces for LCD screens, and causes damage to the LCD screen. A lot of waste of other resources in the chip in

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  • LCD graphical display controller and control method

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Embodiment Construction

[0037] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0038] The hardware structure of the present invention is as figure 1 As shown, it mainly includes FPGA module, video memory module, character resource storage module, external device control bus socket and TFT-LCD socket. The chips constituting each main part are commonly used chips. For example, the FPGA chip adopts Cyclone EP1C3 series FPGA of Altera Company, the character resource storage module adopts K9F1208U0M NAND FLASH of SAMSUNG Company, and the video memory module adopts IS61LV51216 512KB 16-bit SRAM of ISSI Company. Since the main functions are realized inside the FPGA, the components and connections of the system are less, so the PCB layout of the present invention is relatively simple. The overall cost is also lower. The main system functions are realized by FPGA, and the integration degree is high, which makes the system smaller. Moreover, F...

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Abstract

The invention discloses a liquid crystal graphical display controller and a control method. The controller comprises an FPGA module, a video memory module, a storage module for character resources, an external device control bus hut and a TFT-LCD socket, and is characterized in that: the FPGA module includes bidirectional communication data connection between an external bus extended interface and the external device control bus hut, thus realizing the interaction with an external control device; a display output control signal of the FPGA module is connected with the TFT-LCD socket to realize the control of the TFT-LCD display; a display data signal of the FPGA module is both-way connected with the video memory module to realize read-write operation for the displayed content; and a character data signal of the FPGA module is both-way connected with the storage module for character resources to realize the read control of the storage module for character resources.

Description

technical field [0001] The invention relates to a liquid crystal graphic display controller and a control method. Background technique [0002] Due to its ultra-thin size, high brightness and high definition, TFT-LCD liquid crystal display is widely used in industrial equipment to realize graphical interface display and human-computer interaction functions. The existing TFT-LCD display control solutions mainly include: 1) Use a dedicated LCD controller chip. Such as LR38820 of Japan's Sharp Corporation (SHARP), and S1D13774 of Japan's Epson Corporation (EPSON). These chips can support various types of TFT-LCD display functions, and also provide rich microcontroller interfaces. However, these chips are mainly used for CPUs with more than 16 bits, and the setting and programming are more complicated. Especially in terms of graphic functions, such as realizing the superposition of graphics and switching between different graphics, it is relatively lacking. It is also constr...

Claims

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Application Information

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IPC IPC(8): G09G3/36
Inventor 梅雪松刘栋陶涛许睦旬姜歌东孙挪刚
Owner XI AN JIAOTONG UNIV
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