Multi-layer flat panel display screen apparatus

• US 5,986,737 A
• Filed: 06/12/1997
• Issued: 11/16/1999
• Est. Priority Date: 06/27/1995
• Status: Expired due to Term

• Current Assignee: RPX Corporation
• Original Assignee: Silicon Graphics Incorporated (Graphics Properties Holdings, Inc.)
• Inventors: Siefert, Steven, Evanicky, Daniel E., Keely, Leroy Bertrand
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): KIM, JOANNE H
• Application Number:
  US08/873,944
• Time in Patent Office: 887 Days
• Field of Search: 349/162, 349/137, 313/478, 313/479, 313/466, 313/110, 359/585, 359/586, 359/587, 359/588, 359/589, 359/590
• US Class Current: 349/137
• CPC Class Codes: G02B 6/0056 for producing polarisation effects, e.g. by a surface with polarizing properties or by an additional polarizing elements
• CPC Class Codes: G02B 6/0068 Arrangements of plural sources, e.g. multi-colour light sources
• CPC Class Codes: G02B 6/0085 Means for removing heat created by the light source from the package heat extraction or cooling elements for semiconductor light sources in general H01L33/64
• CPC Class Codes: G02B 6/0088 of the light guide or other optical sheets in the package
• CPC Class Codes: G02B 6/009 of the light source in the package G02B6/0021 takes precedence
• CPC Class Codes: G02F 1/133334 Electromagnetic shields
• CPC Class Codes: G02F 1/133502 Antiglare, refractive index matching layers
• CPC Class Codes: G02F 1/133615 Edge-illuminating devices, i.e. illuminating from the side
• CPC Class Codes: G02F 1/133627 Projection-direct viewing
• CPC Class Codes: G03B 21/132 Overhead projectors, i.e. capable of projecting hand-writing or drawing during action epidiascopic projectors G03B21/08
• CPC Class Codes: G06F 1/1601 Constructional details related to the housing of computer displays, e.g. of CRT monitors, of flat displays constructional details related to flat displays integrated in a portable computer, e.g. laptop, handheld computer G06F1/1637; constructional details related to television receivers H04N5/64
• CPC Class Codes: G06F 1/1616 with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
• CPC Class Codes: G06F 1/1637 Details related to the display arrangement, including those related to the mounting of the display in the housing
• CPC Class Codes: G06F 2200/1612 Flat panel monitor
• CPC Class Codes: G09G 2310/0283 Arrangement of drivers for different directions of scanning
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers
• CPC Class Codes: G09G 3/3685 Details of drivers for data electrodes
• CPC Class Codes: H04N 5/70 Circuit details for electroluminescent devices
• CPC Class Codes: H04N 5/7408 Direct viewing projectors, e.g. an image displayed on a video CRT or LCD display being projected on a screen

Abstract

A multi-layer flat panel display screen. The present invention includes a multi-layer flat panel display screen including a rear polarizer for polarizing incident light; a back glass structure disposed adjacent to the rear polarizer; a thin film matrix for selectively polarizing light emitted through the rear polarizer, the thin film matrix including a transistor layer having a two-dimensional matrix of individually addressable transistors; a color filter layer; and a liquid crystal layer disposed between the transistor layer and the color filter layer. The multi-layer flat panel display screen also includes a front glass structure disposed adjacent to the thin film matrix; a front polarizer for polarizing light emitted through the thin film matrix; and an anti-reflective and conductive layer for increasing light intensity and for reducing electromagnetic emissions, the anti-reflective and conductive layer composed of alternating layers of a dielectric layer and a transparent conductive layer, wherein the transparent conductive layers are grounded wherein the anti-reflective and conductive layer is disposed on the front polarizer.

Claims

1. A multi-layer flat panel display screen comprising:

(a) a rear polarizer for polarizing incident light;

(b) a back glass structure disposed adjacent to said rear polarizer;

(c) a thin film matrix for selectively polarizing light emitted through said rear polarizer, said thin film matrix comprising;

(i) a transistor layer having a two-dimensional matrix of individually addressable transistors;

(ii) a color filter layer; and

(iii) a liquid crystal layer disposed between said transistor layer and said color filter layer;

(d) a front glass structure disposed adjacent to said thin film matrix;

(e) a front polarizer for polarizing light emitted through said thin film matrix; and

(f) an anti-reflective and conductive layer for increasing light intensity and for reducing electromagnetic emissions, said anti-reflective and conductive layer composed of alternating layers of dielectric layers and transparent conductive layers, wherein said transparent conductive layers are grounded, and disposed on said further polarizer.

2. A flat panel display screen as described in claim 1 wherein said transparent conductive layer contains In₂ O₃ /SnO.

3. A flat panel display screen as described in claim 1 wherein said dielectric layer contains TiO₂.

4. A flat panel display screen as described in claim 1 further comprising an anti-glare layer disposed between said front polarizer and said anti-reflective and conductive layer.

5. A flat panel display screen as described in claim 1 further comprising another anti-reflective and conductive layer disposed on said rear polarizer, wherein said another anti-reflective and conductive layer is grounded.

6. A multi-layer flat panel display screen comprising:

(a) a rear polarizer for polarizing incident light;

(b) a back glass structure disposed adjacent to said rear polarizer;

(c) a thin film matrix for selectively polarizing light emitted through said rear polarizer, said thin film matrix comprising;

(i) a transistor layer having a two-dimensional matrix of individually addressable transistors;

(ii) a color filter layer; and

(iii) a liquid crystal layer disposed between said transistor layer and said color filter layer;

(d) a front glass structure disposed adjacent to said thin film matrix;

(e) a front polarizer for polarizing light emitted through said thin film matrix;

(f) an anti-reflective and conductive layer for increasing light intensity and for reducing electromagnetic emissions, said anti-reflective and conductive layer composed of alternating layers of dielectric layers and transparent conductive layers, wherein said transparent conductive layers are grounded, and disposed on said front polarizer; and

(h) a first anti-glare layer disposed between said front polarizer and said anti-reflective and conductive layer and a second anti-reflective and conductive layer disposed on said rear polarizer, wherein said second anti-reflective and conductive layer is grounded.

7. A flat panel display screen as described in claim 6 wherein said transparent conductive layer contains In₂ O₃ /SnO.

8. A flat panel display screen as described in claim 6 wherein said dielectric layer contains TiO₂.

9. A flat panel display screen as described in claim 6 wherein said dielectric layer contains SiO₂.