Liquid crystal display device of reflection type

• US 6,025,893 A
• Filed: 07/03/1997
• Issued: 02/15/2000
• Est. Priority Date: 07/04/1996
• Status: Expired due to Fees

• Current Assignee: Pioneer Micro Technology Corporation (Pioneer Corporation)
• Original Assignee: Pioneer Electronic Corporation (Pioneer Corporation), Pioneer Video Corporation (Pioneer Corporation)
• Inventors: Koarai, Mitsuru, Kadowaki, Takeshi
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): NGUYEN, DUNG T
• Application Number:
  US08/887,898
• Time in Patent Office: 957 Days
• Field of Search: 349/58, 349/149, 349/150, 349/151, 349/152, 349/158, 349/60
• US Class Current: 349/58
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/136277 formed on a semiconductor substrate, e.g. of silicon
• CPC Class Codes: G02F 2202/28 Adhesive materials or arrangements

Abstract

A liquid crystal display device of reflection type has a liquid crystal display panel and a fixture substrate for fixing the liquid crystal display panel. The liquid crystal display panel is provided with: a semiconductor substrate; a transparent substrate opposed to the semiconductor substrate and on which a transparent electrode is formed, the transparent substrate having a width in a first direction along a surface thereof wider than the semiconductor substrate; a liquid crystal layer sealed between the semiconductor substrate and the transparent substrate; a plurality of switching elements formed on the semiconductor substrate in a matrix manner in correspondence with a pixel arrangement; and a plurality of pixel electrodes formed in the matrix manner in correspondence with the pixel arrangement each connected to respective one of the switching elements. The fixture substrate is provided with an aperture portion to which an aperture, which area is larger than an outline of the semiconductor substrate and which width in the first direction is narrower than the transparent substrate, is formed. The semiconductor substrate is disposed within the aperture. And that, both of edge portions in the first direction of the transparent substrate are adhered on the fixture substrate at a peripheral of the aperture by an adhesive agent.

Claims

1. A liquid crystal display device of reflection type comprising a liquid crystal display panel of reflection type and a fixture substrate for fixing said liquid crystal display panel thereto,

said liquid crystal display panel comprising:

a semiconductor substrate;

a transparent substrate opposed to said semiconductor substrate and on which a transparent electrode is formed at a side opposing to said semiconductor substrate, said transparent substrate having a width in a first direction along a surface thereof wider than said semiconductor substrate;

a liquid crystal layer sealed between said semiconductor substrate and said transparent substrate;

a plurality of switching elements formed on said semiconductor substrate at a side opposing to said transparent substrate in a matrix manner in correspondence with a pixel arrangement; and

a plurality of pixel electrodes formed in the matrix manner in correspondence with the pixel arrangement each connected to respective one of said switching elements,

said fixture substrate comprising an aperture portion to which an aperture, whose area is larger than an outline of said semiconductor substrate and whose width in said first direction is narrower than said transparent substrate, is formed, said semiconductor substrate being disposed within said aperture, both of edge portions in said first direction of said transparent substrate being adhered on said fixture substrate at a periphery of said aperture by an adhesive agent.

2. A liquid crystal display device according to claim 1, wherein

a first terminal is formed on said fixture substrate at the periphery, at least in said first direction, of said aperture,

said adhesive agent has an electrically conductive property, and

said transparent electrode is electrically connected at the edge portions in said first direction of said transparent substrate with said first terminal by said adhesive agent.

3. A liquid crystal display device according to claim 2, wherein

said adhesive agent comprises an adhesive agent of ultra-violet light hardening type having the electrically conductive property.

4. A liquid crystal display device according to claim 2, wherein

a plurality of second terminals, which are respectively connected to said switching elements, are formed on said semiconductor substrate at an edge portion thereof in a second direction, which is perpendicular to said first direction,

a plurality of third terminals are formed on said fixture substrate such that said third terminals are respectively opposed to said second terminals,

a surface of said edge portion of said semiconductor substrate, where said second terminals are formed, and a surface of said fixture substrate, where said third terminals are formed, are disposed at a substantially same level, with respect to a direction perpendicular to the surface of said fixture substrate, to each other, and

said second terminals and said third terminals are respectively connected by conductors.

5. A liquid crystal display device according to claim 4, wherein each of said conductors comprises a bonding wire bonded to respective one of said second terminals at one end thereof and to respective one of said third terminals at the other end thereof.

6. A liquid crystal display device according to claim 4, wherein each of said conductors comprises a beam lead formed on respective one of said second terminals and bonded to respective one of said third terminals at a lead portion thereof.

7. A liquid crystal display device according to claim 2, wherein

said first terminal is shaped in a U character on said fixture substrate positioned around said aperture, and

both of end portions of said first terminal are connected to said transparent electrode by said adhesive agent.

8. A liquid crystal display device according to claim 1, wherein said switching elements respectively comprise MOS FETs formed on said semiconductor substrate, which are insulated from each other by an insulation layer formed on said semiconductor substrate, and

said pixel electrodes are electrically insulated from each other by a gap filled with said insulation layer.

9. A liquid crystal display device according to claim 1, further comprising a dielectric layer formed on said semiconductor substrate at the side opposing to said transparent substrate for reflecting an incident light from said transparent substrate through said liquid crystal layer.

10. A liquid crystal display device according to claim 1, wherein each of said pixel electrodes comprises aluminum having a role of a reflection layer for reflecting an incident light from said transparent substrate through said liquid crystal layer.