Device and method for adjusting VCOM of mipi liquid crystal module based on fpga

A liquid crystal module and adjustment technology, applied in the direction of instruments, static indicators, etc., can solve the problems that cannot meet the requirements of signal rate and amplitude, high cost of system hardware, and limited length of read and write, so as to reduce the number of MCU control The effect of the module

Active Publication Date: 2017-07-07
WUHAN JINGCE ELECTRONICS GRP CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. In this solution, each bridge chip can only correspond to one module. For a multi-channel LCD module test system, multiple bridge chips are required. The peripheral circuits are complex and the cost of system hardware is high.
[0005] 2. The signal output rate and amplitude of the MIPI bridge chip have been defined inside the chip, which has poor flexibility and cannot meet the requirements of all modules for signal rate and amplitude
[0006] 3. Using the MIPI bridge chip solution, since the read and write length of the module IC register is limited by the length of the FIFO (First Input First Output, first-in-first-out queue) inside the bridge chip, the storage space of the module IC register may not be sufficient. Meet the conditions of reading and writing data length requirements

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Device and method for adjusting VCOM of mipi liquid crystal module based on fpga

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments:

[0024] Such as figure 1 The FPGA-based MIPI LCD module Vcom calibration device includes a host computer interaction module 1, an ARM controller 2, a MIPI LCD module to be tested 4, and an FPGA signal unit 3, wherein the host computer interaction module 1 The ARM controller 2 is connected through a network port, the ARM controller 2 is connected to the FPGA signal unit 3 through an external bus interface (EBI), and the FPGA signal unit 3 is connected to the MIPI liquid crystal module 4 under test.

[0025] In the above technical solution, the FPGA signal unit 3 is connected to the MIPI liquid crystal module 4 to be tested through the MIPI protocol interface.

[0026] In the above technical solution, there are multiple MIPI liquid crystal modules 4 to be tested, the MIPI protocol interface has multiple channels, and the FPGA signal unit 3 is connected to ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a FPGA-based MIPI liquid crystal module VCOM adjustment device, which includes an upper computer interaction module, an ARM controller and a MIPI liquid crystal module to be tested, and is characterized in that it also includes an FPGA signal unit, wherein the The host computer interaction module is connected to the ARM controller through the network port, the ARM controller is connected to the FPGA signal unit through the external interface bus, and the FPGA signal unit is connected to the MIPI liquid crystal module to be tested. The invention can save the MIPI bridge chip in the multi-channel test system of the liquid crystal module, improve the OTP development efficiency of the MIPI liquid crystal module, meet the requirements of various liquid crystal modules based on the MIPI protocol, and improve the production efficiency of the liquid crystal module.

Description

Technical field [0001] The invention relates to the technical field of liquid crystal module testing, in particular to an FPGA-based MIPI liquid crystal module Vcom adjustment device and method. Background technique [0002] Vcom (Voltage of Common electrode, common electrode voltage) is a voltage value at the panel terminal of the liquid crystal module, which is determined by the characteristics of the liquid crystal and the working principle of the liquid crystal module. There is a positive and negative deflection voltage in the panel (module) drive circuit, Vcom It needs to be set at the most central point of this positive and negative deflection voltage. By adjusting the value of Vcom, the Flicker (flicker) value of the Panel control can be adjusted to the minimum, so that the display effect of the Panel can reach the best. Only relying on human eyes to observe and adjust the Vcom voltage will cause deviations. For higher frequencies such as 120Hz and 240Hz, people cannot adj...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(China)
IPC IPC(8): G09G3/00
Inventor彭骞饶兴祝存涛陈凯沈亚非
OwnerWUHAN JINGCE ELECTRONICS GRP CO LTD