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Display module VCOM voltage regulation method and circuit

A technology of voltage regulation circuit and display module, applied in static indicators, instruments, etc., can solve the problems of large equipment occupation, many process nodes, complicated subsequent modifications, etc., and achieve the effect of improving maintenance efficiency

Pending Publication Date: 2022-08-05
TRULY OPTO ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In view of the above problems, a display module VCOM voltage adjustment method and circuit are proposed. By connecting the VCOM voltage unit and the adjustable voltage unit in parallel, the sliding rheostat is used to adjust the variable voltage value corresponding to the best Flicker value of the display module, and the use of this The variable voltage value obtains the VCOM voltage, which solves the problem that when the existing display module adjusts the VCOM voltage, there are many process nodes, the equipment occupies a lot, and the follow-up modification is relatively complicated, which improves the post-maintenance efficiency

Method used

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  • Display module VCOM voltage regulation method and circuit
  • Display module VCOM voltage regulation method and circuit

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Effect test

Embodiment 1

[0071] like figure 1 , figure 1 It is a schematic diagram of the first embodiment of a display module VCOM voltage adjustment method in the present invention; a display module VCOM voltage adjustment method includes: step 100, obtaining the basic power supply voltage of the FPC circuit of the display module; step 200, using the VCOM The VCOM voltage unit 112 and the adjustable voltage unit 111 in the voltage acquisition circuit 11 divide the basic power supply voltage; step 300, according to the Flicker value of the display module, change the voltage value of the adjustable voltage unit 111 to adjust the VCOM voltage value ; wherein, step 200 includes step 210 , changing the voltage value by adjusting the resistance value in the adjustable voltage unit 111 .

[0072] The VCOM voltage is used as a reference voltage for compensating for the difference in the liquid crystal voltage of two adjacent frames of pictures, so that the liquid crystal voltages of the two adjacent frames...

Embodiment 2

[0074] Preferably, as figure 2 , figure 2 It is a schematic diagram of a second embodiment of a display module VCOM voltage adjustment method in the present invention; step 100 includes step 110, connecting the current limiting unit 12 between the VCOM voltage acquisition circuit 11 and the IC chip 13 of the FPC circuit; step 120, VCOM The voltage obtaining circuit 11 obtains the basic power supply voltage through the current limiting unit 12 .

[0075] Preferably, as image 3 , image 3 It is a schematic diagram of a third embodiment of a method for adjusting the VCOM voltage of a display module according to the present invention; step 210 includes: step 211, connecting the adjustable voltage unit 111 and the VCOM voltage unit 112 in parallel to form a parallel circuit; step 212, connecting the parallel circuit The common contact is connected to the current limiting unit 12 .

[0076] Preferably, the current limiting unit 12 includes a first resistor, and the adjustable...

Embodiment 3

[0086] like Figure 7 , Figure 7 It is the first schematic diagram of the module connection of a display module VCOM voltage adjustment circuit 10 in the present invention; a display module VCOM voltage adjustment circuit 10 adopts the adjustment method of the first aspect, including: an IC chip 13 circuit, a VCOM voltage acquisition circuit 11. The current limiting unit 12; the VCOM voltage acquisition circuit 11 is electrically connected to the IC chip 13 circuit through the current limiting unit 12; the IC chip 13 circuit is used to limit the current of the chip circuit; the VCOM voltage acquisition circuit 11 is used for the circuit according to the IC chip 13 circuit The base supply voltage of the output gets the VCOM voltage.

[0087] Preferably, as Figure 8 , Figure 8 This is the second schematic diagram of the module connection of a display module VCOM voltage adjustment circuit 10 in the present invention; the VCOM voltage acquisition circuit 11 includes an adju...

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Abstract

The invention discloses a display module VCOM voltage regulation method and circuit. The method comprises the steps of obtaining a basic power supply voltage of a display module FPC circuit; a VCOM voltage unit and an adjustable voltage unit in the VCOM voltage acquisition circuit are used for dividing the basic power supply voltage; according to the Flicker value of the display module, the voltage value of the adjustable voltage unit is changed to adjust the VCOM voltage value; the circuit comprises an IC chip circuit, a VCOM voltage acquisition circuit and a current limiting unit. The VCOM voltage acquisition circuit is electrically connected with the IC chip circuit through the current limiting unit. By implementing the display module, the problems that when an existing display module adjusts the VCOM voltage, the number of flow nodes of the method is large, the number of occupied equipment is large, and follow-up modification is relatively complex are solved, and the later maintenance efficiency is improved.

Description

technical field [0001] The invention relates to the field of camera manufacturing technology, in particular to a method and circuit for adjusting the VCOM voltage of a display module. Background technique [0002] Due to the characteristics of the liquid crystal display module, in order to obtain a better display effect, that is, the minimum screen flicker and the minimum Flicker, the module manufacturer usually selects and adjusts the best vcom voltage for the module when producing the display module. [0003] The normal adjustment method is: [0004] 1) Light up the display module and communicate with the host computer; [0005] 2) Provide different VCOM voltages through the host computer control IC; [0006] 3) The host computer controls the display module to display the Flicker screen; [0007] 4) Optical equipment tests the Flicker value under the current VCOM voltage; [0008] 5) Program the appropriate VCOM voltage value to the IC through the host computer. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG09G3/36G09G2320/0247
Inventor 李春平樊劼
Owner TRULY OPTO ELECTRONICS
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