Liquid crystal display apparatus in which a non-transmissive elastic member surrounding a display area is disposed between a viewer side light transmissive plate and the LCD

• US 5,659,376 A
• Filed: 08/10/1994
• Issued: 08/19/1997
• Est. Priority Date: 08/10/1993
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Tsuchiya, Hidetarou, Takabayashi, Hiroshi, Shioya, Yasushi, Uehara, Makoto, Yokomizo, Hiroyuki, Itazawa, Toshiaki, Tajima, Hisao, Yabu, Shigeki, Onitsuka, Yoshihiro, Iwayama, Mitsuo
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): Malinowski, Walter J.
• Application Number:
  US08/288,308
• Time in Patent Office: 1,105 Days
• Field of Search: 348/794, 359/48, 359/49, 359/69, 359/83, 362/29, 362/330, 362/30, 349/58, 349/60, 349/64
• 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 1/133604 with lamps
• CPC Class Codes: G02F 2201/503 Arrangements improving the resistance to shock

Abstract

A liquid crystal display apparatus is constituted by: a housing; a liquid crystal panel comprising a liquid crystal disposed between a pair of substrates each provided with electrodes, the liquid crystal panel being affixed to the housing; and a backlight for illuminating the liquid crystal panel, detachably affixed to the housing. A light-transmissive plate, such as a diffusion plate, allowing transmission of light from the backlight is further disposed between the liquid crystal panel and the backlight so as to define an almost closed first space in cooperation with the liquid crystal panel, whereby the first space retaina its almost closed state even when the backlight is detached from the housing.

Claims

1. A liquid crystal display apparatus, comprising:

a liquid crystal panel comprising a liquid crystal disposed between a pair of substrates each provided with electrodes,

a backlight for illuminating the liquid crystal panel,

a diffusion plate disposed between the backlight and the liquid crystal panel for diffusing light from the backlight, and

a housing bearing a supporting member via an interposed elastic member, said supporting member having an opening and supporting the liquid crystal panel, the backlight and the diffusion plate,

the liquid crystal panel being affixed to the supporting member so as to cover one side of the opening and the diffusion plate being affixed to the supporting member so as to cover another side of the opening, and

wherein the diffusion plate is disposed in the vicinity of the liquid crystal panel so as to define an almost closed space in combination with the supporting member and the liquid crystal panel.

2. An apparatus according to claim 1, wherein a part of the housing opposing the liquid crystal panel is formed of glass.

3. An apparatus according to claim 1, wherein the liquid crystal is a ferroelectric liquid crystal.

16. An information transmission apparatus, comprising:

a graphic controller for outputting a data signal and a scanning scheme signal,

a scanning signal control circuit for outputting scanning line address data and a scanning scheme signal, and

a liquid crystal signal display apparatus according to any one of claims 1, 4, 9, 10, 11, 12, 13, and 14.

4. A display apparatus, comprising:

a display panel for displaying images,

a housing for supporting the display panel,

a light-transmissive protective plate disposed on a display surface side of the display panel and attached to the housing;

a light source disposed on a back side of the display panel, and

a light transmission plate disposed between the display panel and the light source, so as to define a first almost closed space between the display panel and the light-transmission plate,

wherein the display panel, the light transmission plate and the protective plate are attached to the housing to form an assembled unit containing said first almost closed space, so as to allow detachment of the light source from the assembled unit while retaining said almost closed space,

wherein a non-transmissive elastic member is disposed between the light-transmissive protective plate and the display panel so as to surround a display area of the display panel.

5. A display apparatus according to claim 4, wherein said display panel is attached to a panel-supporting member, and the panel supporting member is attached to the housing via an elastic member.

6. A display apparatus according to claim 5, wherein a circuit board comprising means for driving the display panel and a circuit film connecting the circuit board and the display panel are disposed on the panel-supporting member.

7. A display apparatus according to claim 5, wherein the light transmission plate is attached to the panel-supporting member.

8. A display apparatus according to claim 5, wherein the light source is attached to the housing.

9. A display apparatus, comprising:

a display panel for displaying images,

a housing for supporting the display panels,

a light-transmissive protective plate disposed on a display surface side of the display panel and attached to the housing;

a light source disposed on a back side of the display panel, and

a light transmission plate disposed between the display panel and the light source, so as to define a first almost closed space between the display panel and the light-transmission plate,

wherein the display panel, the light transmission plate and the protective plate are attached to the housing to form an assembled unit containing said first almost closed space, so as to allow detachment of the light source from the assembled unit while retaining said almost closed space;

wherein said display panel is attached to a panel-supporting member, and the panel supporting member is attached to the housing via a first elastic member;

wherein said light source is attached to the housing so as to contact the light transmission plate via a second elastic member.

10. A display apparatus, comprising:

a display panel for displaying images,

a housing for supporting the display panel,

a light-transmissive protective plate disposed on a display surface side of the display panel and attached to the housing;

a light source disposed on a back side of the display panel, and

a light transmission plate disposed between the display panel and the light source, so as to define a first almost closed space between the display panel and the light transmission plate,

wherein the display panel, the light transmission plate and the protective plate are attached to the housing to form an assembled unit containing said first almost closed space, so as to allow detachment of the light source from the assembled unit while retaining said almost closed space,

wherein said display panel is attached to a panel-supporting member, and the panel supporting member is attached to the housing via a first elastic member,

wherein said light source is backed with a housing provided with air-communicating perforations.

11. A display apparatus, comprising:

a display panel for displaying images,

a housing for supporting the display panel,

a panel-supporting member to which the display panel and a drive circuit board comprising means for driving the display panel are attached,

an elastic member for attaching the panel-supporting member to the housing,

a light-transmissive protective plate disposed on a display surface side of the display panel and attached to the housing,

a light source disposed on a back side of the display panel, and

a light transmission plate disposed between the display panel and the light source, so as to define an almost closed space between the display panel and the light transmission plate,

wherein the display panel, the light transmission plate and the protective plate are attached to the housing to form an assembled unit containing said almost closed space, so as to allow detachment of the light source from the assembled unit retaining said almost closed space,

wherein a second elastic member is disposed between the light-transmissive protective plate and the display panel so as to surround a display area of the display panel.

17. A display apparatus according to any one of claims 4, 11, 12 and 13, wherein said display panel comprises a pair of substrates and a liquid crystal disposed between the substrates.

18. A display apparatus according to claim 17, wherein said liquid crystal is a ferroelectric liquid crystal.

12. A display apparatus, comprising:

a display panel for displaying images,

a housing for supporting the display panel,

a panel-supporting member to which the display panel and a drive circuit board comprising means for driving the display panel are attached,

an elastic member for attaching the panel-supporting member to the housing,

a light-transmissive protective plate disposed on a display surface side of the display panel and attached to the housing,

a light source disposed on a back side of the display panel,

a light transmission plate disposed between the display panel and the light source, so as to define a first almost closed space between the display panel and the light transmission plate, and

a second almost closed space defined by the display panel, the protective plate and the panel-supporting member,

wherein the display panel, the light-transmission plate and the protective plate are attached to the housing to form an assembled unit containing said first almost closed space, so as to allow detachment of the light source from the assembled unit while retaining said first almost closed space,

wherein a second elastic member is disposed between the light-transmissive protective plate and the display panel so as to surround a display area of the display panel.

13. A display apparatus, comprising:

a display panel for displaying images,

a housing for supporting the display panel,

a panel-supporting member to which the display panel and a drive circuit board comprising means for driving the display panel are attached,

a first elastic member for attaching the panel-supporting member to the housing,

a second elastic member for attaching the display panel to the housing,

a third elastic member for attaching the display panel to the panel-supporting member,

a light-transmissive protective plate disposed on a display surface side of the display panel and attached to the housing,

a light source disposed on a back side of the display panel,

a light transmission plate disposed between the display panel and the light source, so as to define a first almost closed space between the display panel and the light transmission plate, and

a second almost closed space is defined by the display panel, the protective plate and the panel-supporting member,

wherein the display panel, the light transmission plate and the protective plate are attached to the housing to form an assembled unit containing said first almost closed space, so as to allow detachment of the light source from the assembled unit retaining said first almost closed space.

14. A display apparatus, comprising:

a display panel for image display; and

a housing assembly for affixing the display panel, said housing assembly including;

(a) a light-transmissive protective member disposed on a front side of the display panel;

(b) a light transmission member disposed on a back side of the display panel;

(c) a supporting member for supporting a driver for driving the display panel;

(d) a housing surrounding edges of the display panel;

(e) a first elastic member disposed between the display panel and the protective member so as to surround a display area of the display panel and define a first almost closed space between the display panel and the protective member; and

(f) a second elastic member disposed between the display panel and the light transmission member along a periphery of the display panel so as to define a second almost closed space between the display panel and the light transmission member.

15. A display apparatus according to claim 14, wherein said second elastic member is disposed between the light transmission member and the display panel via the supporting member, said supporting member being disposed on the light transmission member.