Liquid crystal display module and projection-type liquid crystal display device

• US 5,880,795 A
• Filed: 05/05/1997
• Issued: 03/09/1999
• Est. Priority Date: 05/10/1996
• Status: Expired due to Term

• Current Assignee: Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Hitachi Device Engineering Co., Ltd. (Hitachi, Ltd.), Hitachi, Ltd.
• Inventors: Nagata, Tetsuya, Miyazawa, Toshio, Saito, Katsutoshi, Takemoto, Iwao, Iguchi, Atsumu
• Primary Examiner(s): Dang, Hung Xuan
• Assistant Examiner(s): Duong, Tai V.
• Application Number:
  US08/851,456
• Time in Patent Office: 673 Days
• Field of Search: 349/58, 349/60, 349/5, 349/149, 349/150, 349/152, 349/158, 361/681, 361/730, 361/736, 439/66, 439/67, 345/903, 345/905
• 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 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: G02F 1/136277 formed on a semiconductor substrate, e.g. of silicon
• CPC Class Codes: H05K 3/361 Assembling flexible printed circuits with other printed circuits

Abstract

A reflection-type liquid crystal display module has a liquid crystal panel including a first substrate of, for example, a rectangular shape, a second substrate opposed to the first substrate and a liquid crystal layer provided in a space between the first substrate and the second substrate to form a display screen, a package for encasing and holding the liquid crystal panel while maintaining the first substrate in an exposed state and a dichroic prism to which the first substrate is attached. At least two sides each of the first substrate have a side edge extruding outwardly over a corresponding side end of the second substrate. The side edges of the first substrate are fixed between the dichroic prism and the package, whereby the second substrate is supported by the first substrate and not by the package.

Claims

1. A liquid crystal display device having a liquid crystal display module, said liquid crystal display module including a liquid crystal panel having at least a first substrate, a second substrate opposed to the first substrate and a liquid crystal layer provided in a space between the first and second substrates, a flexible substrate electrically connected to the second substrate and a package for encasing and holding the liquid crystal panel, wherein:

each of at least two sides of the first substrate has a side edge extruding outwardly over a corresponding side end of the second substrate;

a connection member is provided at one side of the second substrate to extrude outwardly from one side of the first substrate for connection with the flexible substrate; and

the liquid crystal panel is fixed to the package by the side edges of the first substrate.

2. A liquid crystal display device having a reflection-type liquid crystal display module, said liquid crystal display module including a liquid crystal panel having at least a first substrate, a second substrate opposed to the first substrate and a liquid crystal layer provided in a space between the first and second substrates, a flexible substrate electrically connected to the second substrate, a package for encasing and holding the liquid crystal panel and a glass plate or a lens closely contacted to said liquid crystal panel, wherein:

each of at least two sides of the first substrate has a side edge extruding outwardly over a corresponding side end of the second substrate;

a connection member is provided at one side of the second substrate to extrude outwardly from one side of the first substrate for connection with the flexible substrate; and

the side edges of the first substrate are fixed to the package, whereby the second substrate is supported by the first substrate and not by the package.

3. A projection-type liquid crystal projector comprising reflection-type liquid crystal display modules each including a liquid crystal panel mounted on a package and having a liquid crystal layer arranged between a first substrate and a second substrate, a flexible substrate for supplying signals to the liquid crystal panel, a dichroic prism to which the reflection-type liquid crystal display modules are attached, a light source for illuminating the respective reflection-type liquid crystal display modules through the dichroic prism and an optical system for projecting reflected lights from the respective reflection-type display modules onto a screen, wherein, in each of said reflection-type liquid crystal display modules:

each of at least two sides of the first substrate has a side edge extruding outwardly over a corresponding side end of the second substrate;

a connection member is provided at one side of the second substrate to extrude outwardly from one side of the first substrate for connection with the flexible substrate; and

side edges of the first substrate are fixed to the package, whereby the second substrate is supported by the first substrate and not by the package.

4. A liquid crystal display device comprising a liquid crystal panel having at least a first substrate, a second substrate opposed to the first substrate and a liquid crystal layer provided in a space between the first and second substrates, a package for encasing and holding the liquid crystal panel and flexible printed substrate for supplying signals to the liquid crystal panel, wherein:

each of at least two sides of the first substrate has a side edge extruding outwardly over a corresponding side end of the second substrate;

a connection member is provided at one side of the second substrate to extrude outwardly from one side of the first substrate for connection with the flexible substrate;

the side edges of the first substrate are fixed to the package; and

terminals provided on one end part of the flexible printed substrate and connected to the liquid crystal panel include first terminals electrically connected to the side edges of the first substrate and second terminals electrically connected to the second substrate.

5. A projection-type liquid crystal projector comprising reflection-type liquid crystal display modules each including a package, a liquid crystal panel having a liquid crystal layer arranged between a first substrate and a second substrate and a flexible substrate for supplying signals to the liquid crystal panel, the crystal panel and the flexible substrate being mounted on the package, the projector further comprising a dichroic prism to which the reflection-type liquid crystal display modules are attached, a light source for illuminating the respective reflection-type liquid crystal display modules through the dichroic prism and an optical system for projecting reflected lights from the reflection-type liquid crystal display modules onto a screen, said reflected lights being combined by the dichroic prism, wherein:

(a) in each of said reflection-type liquid crystal display modules

each of at least two sides of the first substrate has a side edge extruding outwardly over a corresponding side end of the second substrate,

a connection member is provided at one side of the second substrate to extrude outwardly from one side of the first substrate for connection with the flexible substrate, and

the side edges of the first substrate are fixed to the package, whereby the second substrate is supported by the first substrate and not by the package; and

(b) terminals provided on one end part of the flexible printed substrate and connected to the liquid crystal panels include first terminals electrically connected to the side edges of the first substrates and second terminals electrically connected to the second substrate.