Methods for adhering multiple stack liquid crystal display panels

• US 5,179,459 A
• Filed: 06/28/1991
• Issued: 01/12/1993
• Est. Priority Date: 06/28/1991
• Status: Expired due to Term

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Compaq Computer Corporation (HP Inc.)
• Inventors: Plesinger, Boris
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): MAI, HUY KIM
• Application Number:
  US07/724,524
• Time in Patent Office: 564 Days
• Field of Search: 359/53, 359/80, 359/83, 359/74
• US Class Current: 349/73
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells
• CPC Class Codes: G02F 1/1347 Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells

Abstract

Color flat screen displays and methods of fabricating color flat screen displays. Color flat screen displays described herein comprise at least two liquid crystal display panels, each of said panels containing pixels which are substantially aligned, adhesive gaskets formed on a periphery of one side of a first of the two liquid crystal display panels for providing a mechanical connection between the first panel and the second liquid crystal display panel, and a cavity disposed between the first and second liquid crystal display panels formed by the thickness of the adhesive gasket, the cavity being adapted to receive a material for optically matching pixels in the first panel to pixels in the second panel. Color flat screen displays described herein allow for efficient and economical fabrication and also are rugged and sturdy due to the new fabrication methods which are employed.

Claims

1. A method for laminating multiple liquid crystal display panels, comprising the steps of:

providing at least two liquid crystal display panels adapted to be optically interfaced when the panels are joined such that pixels in the panels are substantially aligned;

applying an adhesive to a specified thickness on a periphery of a first of said at least two liquid crystal display panels to form a first adhesive gasket on said first panel;

aligning a second of said at least two liquid crystal display panels to the first panel by substantially aligning corresponding pixels in the first and second pixels; and

pressing the first and second panels together such that the adhesive on the periphery of the first side of the first panel causes the first and second panels to be laminated together.

2. The method recited in claim 1 further comprising the steps of:

providing a third liquid crystal display panel adapted to be optically interfaced with the first liquid crystal display panel when the first and third liquid crystal display panel are joined such that pixels in the first and third liquid crystal display panels are substantially aligned;

applying an adhesive to a specified thickness on a periphery of a second side of the first liquid crystal display panel to form a second adhesive gasket on the second side of the first liquid crystal display panel;

aligning the third liquid crystal display panel to the first liquid crystal display panel by substantially aligning corresponding pixels in the first and third panels; and

pressing the first and third panels together such that the adhesive on the periphery of the second side of the first panel causes the first and third panels to be laminated together.

3. The method recited in claim 2 wherein the first and second adhesive gaskets are applied to the peripheries of the first and second sides of the first panel such that a space is left along the peripheries of the two sides of the first panel substantially free of the adhesive.

4. The method recited in claim 3 wherein a first cavity is formed between the first and second panels when the first and second panels are pressed together whereby the first cavity is accessible through an opening formed in the display at the space along the periphery of the first side of the first panel which is left substantially free of the adhesive.

5. The method recited in claim 4 wherein a second cavity is formed between the first and third panels when the first and third panels are pressed together whereby the second cavity is accessible through an opening formed in the display at the space along the periphery of the second side of the first panel which is left substantially free of the adhesive.

6. The method recited in claim 5 further comprising the step of filling the first and second cavities with an optical material adapted to match pixels in the first panel to pixels in the second and third panels.

7. The method recited in claim 6 further comprising the step of sealing the openings which are formed in the display at the spaces along the periphery of the first and second sides of the first panel which have been left substantially free of the adhesive.

8. A method for laminating multiple liquid crystal display panels comprising the steps of:

providing at least two liquid crystal display panels containing pixels wherein the pixels on the liquid crystal display panels are substantially optically alignable;

applying an adhesive along a periphery of a first side of a first of the at least two liquid crystal display panels to form a gasket but leaving at least two spaces along the periphery substantially free of the adhesive;

aligning a second of the at least two liquid crystal display panels with the first side of the first panel by substantially aligning corresponding pixels in the first and second panels;

adhering the second panel to the first panel at the adhesive gasket on the first side of the first panel, thereby forming a mechanical bond between the first and second panels along the adhesive gasket on the first side; and

allowing a first cavity to be formed between the first and second panels when the first and second panels are adhered together whereby the first cavity is accessible through at least two openings formed in the color flat screen display at the two spaces along the periphery of the first side of the first panel which is left substantially free of the adhesive.

9. The method recited in claim 8 further comprising the step of applying an adhesive along a periphery of a second side of the first liquid crystal display panel to form a gasket but leaving at least two spaces along the periphery of the second side of the first panel substantially free of the adhesive.

10. The method recited in claim 9 further comprising the step of aligning a third liquid crystal display panel with the second side of the first panel by substantially aligning corresponding pixels in the first and third panels.

11. The method recited in claim 10 further comprising the step of adhering the third panel to the first panel at the adhesive gasket on the second side of the first panel, thereby forming a mechanical bond between the first and third panels along the adhesive gasket on the second side.

12. The method recited in claim 11 further comprising the step of allowing a second cavity to be formed between the first and third panels when the first and third panels are adhered together whereby the second cavity is accessible through at least two openings formed in the color flat screen display at the two spaces along the periphery of the second side of the first panel which is left substantially free of the adhesive.

13. The method recited in claim 12 further comprising the step of filling the first and second cavities with an optical material adapted to match the pixels in the first panel to the pixels in the second and third panels.

14. The method recited in claim 13 further comprising the steps of sealing the openings formed in the color flat screen display at the two spaces along the periphery of the first panel which is adhered to the second panel and the two openings formed in the color flat screen display at the two spaces along the periphery of the first panel which is adhered to the third panel.

15. The method recited in claim 14 further comprising the step of sealing spaces formed between the first and second panels and the first and third panels during fabrication of the color flat screen display with a sealant to provide a pressure hold down of electronic connectors interfaced with the three liquid crystal display panels.

16. A flat screen display comprising:

at least two liquid crystal display panels, each of said panels containing pixels which are substantially aligned;

first adhesive gasket means having a thickness formed on a periphery of one side of a first of the at least two liquid crystal display panels for joining the first panel and a second of the at least two liquid crystal display panels; and

a first cavity disposed between the first and second liquid crystal display panels formed by the thickness of the first adhesive gasket means, the first cavity being adapted to receive a material for optically aligning pixels in the first panel to pixels in the second panel.

17. The flat screen display recited in claim 16 further comprising a third liquid crystal display panel containing pixels which are substantially aligned with the pixels in the first and third panels.

18. The flat screen display recited in claim 17 further comprising second adhesive gasket means having a thickness formed on a periphery of a second side of the first liquid crystal display panel for joining the first panel and the third panel.

19. The flat screen display recited in claim 18 further comprising a second cavity disposed between the first and third liquid crystal display panels formed by the thickness of the second adhesive gasket means, the second cavity being adapted to receive a material for optically matching pixels in the first panel to pixels in the third panel.

20. The flat screen display recited in claim 19 further comprising an optical material filling the first and second cavities for matching pixels in the first panel with pixels in the second panel and for matching pixels in the first panel to pixels in the third panel.