Display systems with multifunctional digitizer module board

• US 7,649,525 B2
• Filed: 12/19/2005
• Issued: 01/19/2010
• Est. Priority Date: 01/04/2005
• Status: Active Grant

• Current Assignee: InnoLux Corporation
• Original Assignee: TPO Displays Corporation (InnoLux Corporation)
• Inventors: Lee, Ying-Chih, Chen, Din-Guo
• Primary Examiner(s): TRAN, MY CHAU T
• Application Number:
  US11/312,285
• Publication Number:
  US 20060146034A1
• Time in Patent Office: 1,492 Days
• Field of Search: 345/173, 345/174, 345/175, 345/176, 345/177, 345/178, 178/18.01, 178/18.03, 178/18.04, 178/18.05, 178/18.06, 178/18.09, 178/18.11
• US Class Current: 345/173
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display

Abstract

Display systems with multifunctional digitizer module board. A shield film is integrated on a digitizer sensor board to form a multifunctional digitizer module board with lower thickness and weight. In the multifunctional digitizer module, a digitizer sensor board senses position of a position pointer or finger contact on a surface and a shield film is integrated on one surface of the digitizer sensor board by semiconductor process to screen out external noise. A display panel is disposed above the multifunctional digitizer module board and coupled thereto, displaying images.

Claims

1. A multifunctional digitizer module board, comprising:

a digitizer sensor board, sensing position of a position pointer or finger contact on a surface;

a shield film integrated on one surface of the digitizer sensor board without adhesive material, for screening out external noise, wherein the shield film is integrated with the digitizer sensor board by semiconductor thin film process;

a reflective film laminated with the other surface of the digitizer sensor board to reflect light;

a first protective film formed between the shield film and the digitizer sensor board; and

a second protective film formed between the reflective film and the digitizer sensor board.

2. The multifunctional digitizer module board as claimed in claim 1, further comprising a separator laminated with the shield film by an adhesive material.

3. The multifunctional digitizer module board as claimed in claim 1, wherein the shield film and the reflective film are integrated with the digitizer sensor board by semiconductor process.

4. The multifunctional digitizer module board as claimed in claim 1, wherein the shield film is integrated on the digitizer sensor film by physical vapor deposition (PVD) or sputtering.

5. The multifunctional digitizer module board as claimed in claim 1, wherein the digitizer sensor board comprises a sensor array printed on a flexible substrate.

6. The multifunctional digitizer module board as claimed in claim 5, the sensor array is printed on the flexible substrate by screen-printing or ink-jet printing.

7. The multifunctional digitizer module board as claimed in claim 5, wherein the flexible substrate comprises polyethylene terephthalate (PET) or cellulose triacetate (TAC).

8. A display system, comprising:

a multifunctional digitizer module board as claimed in claim 1; and

a display panel, disposed above the multifunctional digitizer module board and coupled thereto, displaying images.

9. The display system as claimed in claim 8, further comprising a back light module coupled to the display panel.

10. The display system as claimed in claim 8, further comprising a control unit coupled to the display panel and the multifunctional digitizer module board according to an image signal from a host system via an interface, driving the display panel and generating a scan timing signal to the multifunctional digitizer module.

11. The display system as claimed in claim 10, wherein the multifunctional digitizer module executes a sensing operation to detect the position of a stylus or finger contact on the surface in response to the scan timing signal.

12. The display system as claimed in claim 11, wherein the image signal comprises image data and a clock signal, and the control unit generates the scan timing signal according to the clock signal.

13. The display system as claimed in claim 10, wherein the control unit is a chip on glass (COG) on the display panel.

14. The display system as claimed in claim 10, wherein the control unit is mounted on a flexible printed circuit board (FPC).

15. The display system as claimed in claim 10, wherein the display panel is a liquid crystal display (LCD) panel, an organic light-emitting diode (OLED) display panel or a field emission display (FED) panel.

16. An electronic device, comprising:

a display system as claimed in claim 8; and

a DC/DC converter operatively coupled to the display system, powering the display system to display images.

17. The electronic device as claimed in claim 16, wherein the electronic device is a display monitor, a notebook computer, a tablet computer, a cellular phone or a personal digital assistant (PDA).

18. fabrication method for a multifunctional digitizer module board, comprising:

providing a digitizer sensor board; and

forming a shield film on one surface of the digitizer sensor board by semiconductor thin film process;

forming a reflective film on the other surface of the digitizer sensor board by deposition process;

forming a first protective film formed between the shield film and the digitizer sensor board; and

forming a second protective film formed between the reflective film and the digitizer sensor board.

19. The fabrication method as claimed in claim 18, further comprising forming a separator laminated with the shield film by an adhesive material.

20. The fabrication method as claimed in claim 18, wherein the shield film is formed on the digitizer sensor film by physical vapor deposition (PVD) or sputtering.

21. The fabrication method as claimed in claim 18, wherein the digitizer sensor board comprises a sensor array printed on a flexible substrate.

22. The fabrication method as claimed in claim 21, the sensor array is printed on the flexible substrate by screen-printing or ink-jet printing.

23. The fabrication method as claimed in claim 22, wherein the flexible substrate comprises polyethylene terephthalate (PET) or cellulose triacetate (TAC).