JP2581087Y2 - Liquid crystal display - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device having a driving board and illumination means.

[0002]

2. Description of the Related Art Conventionally, in a liquid crystal display device, various devices have been devised for fixing a liquid crystal cell and peripheral parts, and when the display capacity is small, the liquid crystal cell or the like is directly fixed to a display surface of a device. However, if the display capacity is large, the liquid crystal module is assembled and handled as a so-called liquid crystal module so that the display is easy to handle and can be displayed by applying a drive signal from the outside. In such a liquid crystal module, as shown in Japanese Patent Application Laid-Open No. Sho 60-247222, a driving substrate is connected to a peripheral portion of a liquid crystal cell, an illuminating means is arranged on the back surface, and these are housed in a frame. It constitutes a liquid crystal display device.

[0003]

The use of the frame body in this manner is not merely to adjust the outer shape, but to protect the connection between the driving substrate and the liquid crystal cell, and to use the light guide plate of the illumination means and the light source. There is also the purpose of keeping the distance properly. However, when the frame is used, the alignment of the components increases, and if any of these components is displaced, the display quality is impaired due to the shadow of the components appearing on the display surface. The glass substrate) is damaged by positioning components (for example, nails of a frame). Furthermore, when a frame is used, the thickness of the module increases, and it is difficult to reduce the thickness of the device.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and includes a liquid crystal cell, a driving substrate provided substantially on the same plane as the liquid crystal cell around the liquid crystal cell, and a liquid crystal display. A light guide plate that has at least approximately the same area as the surface area of the cell and the drive substrate and has at least a liquid crystal cell fixedly supported through an intervening layer such as an adhesive buffer or an adhesive and a double-sided tape,
A light source fixed with a guard on one side of the light guide plate is provided.

[0005]

The present invention is based on Japanese Patent Application Laid-Open No. 61-166585 and Japanese Utility Model Application Laid-Open No. 2-91195.
No. 48571), the light guide plate can support both the liquid crystal cell and the driving substrate in a planar manner without the need for any additional frame by merely illuminating the liquid crystal cell with the illuminating means such as a liquid crystal case in the liquid crystal case. Since the liquid crystal cell is supported through the device, the liquid crystal display position is not displaced when stored in the main device etc., and the display quality is less likely to be degraded or damaged by the impact at the time of storage, and it is most easily deformed and affects the lighting effect Since the light source which is easy to apply is guarded and fixed, the assembling work is easy and the thickness can be reduced.

[0006]

1 is a plan view of a liquid crystal display device according to an embodiment of the present invention, and FIG. 2 is a sectional view thereof. In these figures, reference numeral 1 denotes a liquid crystal cell in which, for example, a super twist nematic liquid crystal layer filled between two glass substrates is sandwiched between polarizing plates. Reference numerals 2 and 3 denote driving substrates provided on the periphery of the liquid crystal cell, which are of a tape carrier package (TCP) type in which a driving IC is provided on a flexible substrate, and are located on substantially the same plane as the liquid crystal cell. The driving board 2 may be connected and held by the printed wiring board 4 or the like as necessary. In addition, since the output pad of the drive IC can be arranged along the long side of the drive substrate 3 using an elongated drive IC, the wiring pattern of the flexible substrate can be made parallel and short. As a result, the width of the drive substrate 3 is reduced. Since the width is narrow, the amount of protrusion from the liquid crystal cell 1 is reduced, and it is preferable because the terminal is hardly subjected to an external impact or the like, and the terminal portion is hardly peeled off even if it is received.

Reference numeral 5 denotes a light guide plate of the illuminating means, which is made of a flat transparent acrylic resin or the like, and whose surface is larger than or approximately equal to the surface area of the liquid crystal cell 1 and the driving substrates 2 and 3 combined. It has become. A light diffusion sheet 51 is disposed on the surface of the liquid crystal cell 1 corresponding to the effective display surface. Is provided. On the other hand, the drive substrate 2 on the bottom surface and the side surface and the surface of the light guide plate 5,
A reflection sheet 52 is affixed to the portion corresponding to No. 3 so that unnecessary light does not leak. The light guide plate 5 is laminated with the liquid crystal cell 1 and the drive substrates 2 and 3 and supported by a buffer material such as adhesive silicon rubber, chlorobrene rubber, nitrile rubber or an intervening layer 6 such as an adhesive or a double-sided tape. ing. When a device such as the driving substrate 3 which has a small protrusion from the liquid crystal cell 1 is used, a cushioning material such as rubber is disposed under the driving substrate 3 or the driving substrate is bent without any arrangement. For example, if the intervening layer 6 is thin enough to be in contact with the light guide plate 5, the driving substrate is not supported, and the liquid crystal cell 1 may be supported.

Reference numeral 7 denotes a light source fixed by a guard 8 fixed to one side of the light guide plate by a linear light source such as a cold-cathode tube. The guard 8 is a resin molded product and has a reflection sheet on its inner surface. The light source 51 is arranged so as to be apart from the light source 7 so as to form a fixed curved surface, and holds the light source 7 via cushioning materials provided at both ends thereof.

[0009]

As described above, the liquid crystal cell and the driving substrate are formed in a substantially planar shape, and at least the liquid crystal cell is supported by a sufficiently wide light guide plate, and the light source is also fixed to the light guide plate. These components can be held together, the components are not damaged by claws of the frame during assembly, the display quality is not degraded due to misalignment, and the display device can be made thin because no frame is used. .

[Brief description of the drawings]

FIG. 1 is a plan view of a liquid crystal display according to an embodiment of the present invention.

FIG. 2 is a side sectional view of the liquid crystal display device of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid crystal cell 2 Drive board 3 Drive board 5 Light guide plate 7 Light source

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G02F 1/1345 G02F 1/1335 530

Claims (1)

(57) [Scope of request for utility model registration] 1. A liquid crystal cell, a driving substrate provided on a peripheral portion of the liquid crystal cell on substantially the same plane as the liquid crystal cell, and an adhesive having a surface area larger than or approximately equal to the surface area of the liquid crystal cell and the driving substrate .
Through an intervening layer such as cushioning material or adhesive, double-sided tape
At least the light guide plate for fixing and supporting the liquid crystal cell, a liquid crystal display device being characterized in that includes a light source that is fixed with a guard to first side of the light guide plate.