Liquid crystal display with driving voltage temperature compensation

• US 20080122779A1
• Filed: 11/26/2007
• Published: 05/29/2008
• Est. Priority Date: 11/24/2006
• Status: Abandoned Application

• Current Assignee: InnoLux Corporation
• Original Assignee: INNOCOM TECHNOLOGY (SHENZHEN) CO., LTD.; INNOLUX DISPLAY CORP.
• Inventors: Xu, Wei-Chu
• Application Number:
  US11/986,879
• Publication Number:
  US 20080122779A1
• Time in Patent Office: Days
• US Class Current: 345/101
• CPC Class Codes: G02F 2203/60 Temperature independent
• CPC Class Codes: G09G 2300/0408 Integration of the drivers onto the display substrate
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2320/0252 Improving the response speed
• CPC Class Codes: G09G 2320/041 Temperature compensation
• CPC Class Codes: G09G 3/3685 Details of drivers for data electrodes

Abstract

An exemplary liquid crystal display (200) includes a first substrate (210), a second substrate (220) parallel to the first substrate, a liquid crystal layer (230) between the first and second substrates, a resistivity sensor (280) adjacent to the liquid crystal layer, and a driver (260) configured to provide driving voltages to at least one of the first and second substrates. The resistivity sensor detects a resistivity of the liquid crystal layer, and the driver compensates the driving voltages according to the resistivity of the liquid crystal layer.

Claims

1. A liquid crystal display, comprising:

a first substrate;

a second substrate parallel to the first substrate;

a liquid crystal layer between the first and second substrates;

a resistivity sensor adjacent to the liquid crystal layer; and

a driver configured to provide driving voltages to at least one of the first and second substrates;

wherein the resistivity sensor detects a resistivity of the liquid crystal layer, and the driver compensates the driving voltages according to the resistivity of the liquid crystal layer.

2. The liquid crystal display as claimed in claim 1, wherein the resistivity sensor comprises a first electrode and a second electrode, the first electrode is disposed on the first substrate, the second electrode is disposed on the second substrate.

3. The liquid crystal display as claimed in claim 2, wherein the first and second electrodes are both thin film electrodes.

4. The liquid crystal display as claimed in claim 3, wherein the first electrode has a shape and a size the same as that of the second electrode.

5. The liquid crystal display as claimed in claim 3, wherein the first electrode is aligned directly above the second electrode.

6. The liquid crystal display as claimed in claim 3, wherein the first and second electrodes are both made of a selected one of metal, alloy, and indium tin oxide.

7. The liquid crystal display as claimed in claim 3, wherein the first and second electrodes are both made of a selected one of chromium, aluminum, and copper.

8. The liquid crystal display as claimed in claim 1, further comprising a sealant between the first and second substrates, wherein the sealant, the first substrate, and the second substrate cooperatively define an accommodating space for receiving the liquid crystal layer, and the resistivity sensor is disposed in the accommodating space and adjacent to the sealant.

9. The liquid crystal display as claimed in claim 8, wherein the sealant comprises electrically conductive particles dispensed inside.

10. The liquid crystal display as claimed in claim 1, wherein material of the conductive particles is silver.

11. The liquid crystal display as claimed in claim 1, wherein the driver comprises a look-up table stored integrally, the look-up table comprises a plurality of compensation signals corresponding to different temperature.

12. A liquid crystal display, comprising:

a first substrate;

a second substrate parallel to the first substrate;

a liquid crystal layer between the first and second substrates;

a resistivity sensor adjacent to the liquid crystal layer, the resistivity sensor comprising a first electrode provided at the first substrate and a second electrode provided at the second substrate; and

a driver configured to provide driving voltages to at least one of the first and second substrates;

wherein the driver outputs a voltage signal to the first electrode, receives a current signal from the second electrode, and compensates the driving voltages according to the current signal.

13. The liquid crystal display as claimed in claim 12, wherein the driver comprises an analog to digital converter configured to convert the current signal to a digital signal.

14. The liquid crystal display as claimed in claim 13, wherein the driver further comprises a look-up table, the look-up table comprises a plurality of compensation signals, each of which corresponds to a digital signal.

15. The liquid crystal display as claimed in claim 14, wherein the driver compensates the driving voltages via adding the driving voltages to the corresponding compensation signals or subtracting the corresponding compensation signals from the driving voltages.

16. The liquid crystal display as claimed in claim 15, wherein driver adds the driving voltages to the corresponding compensation signals when the temperature decrease, and subtract the corresponding compensation signals from the driving voltages when the temperature increase.

17. The liquid crystal display as claimed in claim 12, wherein the first electrode is aligned directly above the second electrode.

18. The liquid crystal display as claimed in claim 17, wherein the first electrode has a shape and a size the same as that of the second electrode.

19. The liquid crystal display as claimed in claim 17, wherein the first and second electrodes are both made of one of chromium, aluminum, and copper.

20. A liquid crystal display, comprising:

a first substrate;

a second substrate parallel to the first substrate;

a liquid crystal layer between the first and second substrates;

a first electrode provided at the first substrate and a second electrode provided at the second substrate and both embedded in said liquid crystal layer; and

a driver configured to provide driving voltages to at least one of the first and second substrates;

wherein the driver outputs a voltage signal to the first electrode, receives a current signal from the second electrode, and compensates the driving voltages according to the current signal.