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The driving circuit of the ito electrode in the lcos display structure

A technology of display structure and driving circuit, which is applied in the application field of electronic technology, can solve the problems of high production cost of LCOS liquid crystal display panel, inability of ITO electrode and metal electrode voltage signals to be completely synchronized, etc.

Active Publication Date: 2018-01-26
OMNIVISION TECH (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a driving circuit for ITO electrodes in an LCOS display structure to solve the problem that the voltage signals on the ITO electrodes and metal electrodes cannot be completely synchronized
[0007] Another object of the present invention is to solve the problem of high manufacturing cost of LCOS liquid crystal display panels

Method used

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  • The driving circuit of the ito electrode in the lcos display structure
  • The driving circuit of the ito electrode in the lcos display structure
  • The driving circuit of the ito electrode in the lcos display structure

Examples

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Embodiment 1

[0066] Embodiments of the present invention provide a driving circuit for ITO electrodes in an LCOS display structure, such as image 3 As shown, it includes a power generation module 200 and a selection module 300, the power generation module 200 is used to generate the voltage required to drive the ITO electrode according to the working voltage of the LCOS display structure, and the selection module 300 is used to generate the voltage according to the power supply The voltage required to drive the ITO electrodes generated by the module 200 generates the driving voltage of the ITO electrodes.

[0067] The operating voltages of the LCOS display structure include: a first operating voltage VDD3 and a second operating voltage VDD, the voltage value of the first operating voltage VDD3 is greater than the voltage value of the second operating voltage VDD. The voltage required to drive the ITO electrode includes: a third working voltage VP and a fourth working voltage VN, and the v...

Embodiment 2

[0094] In this embodiment, the feedback control module 201 includes: a first circuit 2011 , a second circuit 2012 and a third circuit 2013 . The structures of the first circuit 2011 , the second circuit 2012 and the third circuit 2013 are all the same as those in the first embodiment, and will not be repeated here.

[0095] Such as Figure 8As shown, the corresponding power stage module 202 module is not limited to: the first charge pump 401, the second charge pump 402, the sixth capacitor C6 and the seventh capacitor C7; the first charge pump 401 and the second charge pump The clock of the pump 402 is synchronized; the first input end EN of the first charge pump 401 is connected to the output end of the second circuit 2012, the second input end is connected to the first operating voltage VDD3, and the output end is connected to the first operating voltage VDD3. The third working voltage VP is connected to the ground through a sixth capacitor C6; the first input terminal EN o...

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Abstract

The invention discloses a drive circuit of an ITO electrode in a LCOS display structure, which is integrated in an LCOS display structure and generates drive voltage of the ITO electrode according to working voltage of the LCOS display structure. The invention enables the drive circuit of the ITO electrode and the LCOS display structure to use the same power supply so as to reduce the power supply voltage in order to adapt to the advanced technology, reduce the size of the chip and save the power consumption. Besides, the drive circuit can also guarantee the synchronization of the voltage signals between the ITO electrode and the LCOS display structure in order to ensure the voltage between the ITO electrode and the LCOS display structure to be in an DC balance state, and enables the service life of the liquid crystal material in the LCOS display structure to be guaranteed. The drive circuit of the ITO electrode in the LCOS display structure is integrated in the LCOS display structure, which reduces the wiring on the PCB board, reduces the cost, reduces the noise interference and improves the anti-interference capability.

Description

technical field [0001] The invention relates to the application field of electronic technology, in particular to a driving circuit for ITO electrodes in an LCOS display structure. Background technique [0002] Liquid crystal display is to fill the liquid crystal material between the two plates (upper electrode and lower electrode), and change the arrangement of molecules inside the liquid crystal material by changing the voltage between the plates, so as to achieve the purpose of shading and light transmission. The characteristics of the liquid crystal material determine that the voltage between the two plates must exceed 5V to achieve a good display effect, and the voltage between the plates is DC (Direct Current, direct current) balanced, otherwise the life of the liquid crystal material will be reduced. [0003] Such as figure 1 As shown, a common LCOS liquid crystal display panel includes a substrate 101, an ITO electrode 102, and an LCOS display structure 103. The ITO ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36
CPCG09G3/3696
Inventor 张鹏婷王韵生
Owner OMNIVISION TECH (SHANGHAI) CO LTD
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