JPH0561727U - LCD display device - Google Patents

Abstract

(57) [Summary] [Purpose] LC that does not cause light leakage or rattling of the light diffusion plate.
Obtain a D display device. [Structure] Ear-shaped projections 7a are formed on a light diffusing plate 7 arranged between the LCD 1 and the lamp 4, and recesses 5g engaging with the ear-shaped projections 7a are provided on both sides of the holder 5 and guides to the recesses. Part 5f
And the ear-shaped convex portion 7a is formed into the concave portion 5 through the guide portion 5f.
By engaging with g, the light diffusion plate 7 is supported by the holder 5 without rattling. Further, the holder 5 is formed of a non-translucent member to prevent light leakage during backlighting.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an LCD display device.

[0002]

[Prior Art]

 FIG. 7 is an exploded perspective view of a conventional LCD display device. Reference numeral 1 is an LCD (liquid crystal display element), which has a pair of terminals 1a. It is connected to the control IC 3 also mounted on the substrate 2 via the wiring pattern 2b formed above. Reference numeral 4 denotes a lamp, which is inserted into the hole 2c of the substrate 2 and soldered. Reference numeral 5 denotes a holder for the LCD 1, which has a light diffusing plate 5a, a window 5b, and a mounting tongue 5c, and is mounted in the hole 2d of the substrate 2 with the LCD 1 sandwiched between the window 5b and the light diffusing plate 5a. A tongue piece 5c is inserted and attached.

Reference numeral 6 denotes a ground plate, which is arranged so as to cover the front surface of the holder 5 and has a hole 6 a and a tongue piece 6 b. The tongue piece 6 b is inserted into the hole 2 e of the board 2 and soldered. FIG. 9 is a cross-sectional view of a conventional LCD display device, and 1b is an adhesive for the caulking portion of the terminal 1a. Further, 1c is a segment of the LCD 1 and 5d is a relief provided for the terminal 1a in the light diffusion plate 5a.

8 and 10 are an exploded perspective view and a sectional view of another conventional LCD display device. The holder 5 has a receiver 5e for a light diffusion plate 7 which is a separate body, a window 5b, and a tongue piece 5c for attachment. is doing . Other configurations are similar to those in FIGS. 7 and 9.

In the conventional device configured as shown in FIGS. 7 and 9, the holder 5 is formed integrally with the light diffusing plate 5a, is formed of a semi-translucent resin material by injection molding, and the LCD 1 5d of the terminal 1a is formed, and the light of the lamp 4 illuminates the LCD 1 as a backlight. Further, the control IC 3 controls and displays the segment 1c of the LCD 1. The ground plate 6 is arranged on the front surface of the LCD 1 to prevent static electricity from jumping into the control IC 3 through the LCD 1 and its terminal 1a and destroying it.

Further, in the conventional device configured as shown in FIGS. 8 and 10, since the holder 5 is formed of white resin having high reflection efficiency, the light transmittance is low, and the light diffusion plate 7 is formed separately. Now, the LCD 1 is backlit by the light of the lamp 4. Since the application range of the adhesive 1b varies in manufacturing, the size of the light diffusion plate 7 is reduced to cope with the problem.

[0007]

[Problems to be solved by the device]

 In the above-mentioned one conventional LCD display device, since the holder 5 and the light diffusion plate 5a are integrally molded by semi-translucent resin, there is a problem that light leaks as a whole, and in the other conventional device, the other conventional device. The holder 5 is made of a non-translucent resin such as white, and the light diffusion plate 7 is formed as a separate body. Considering the application variation of the adhesive 1b, there was play in the vertical direction.

The present invention has been made to solve the above problems, and an object thereof is to obtain an LCD display device capable of preventing light leakage and rattling of a light diffusion plate.

[0009]

[Means for Solving the Problems]

 An LCD display device according to the present invention comprises a light diffusing plate having an ear-shaped convex portion and an opaque member, and a concave portion which engages with the ear-shaped convex portion of the light diffusing plate on both sides of the window portion. A holder is provided which has a guide portion for guiding the ear-shaped convex portion and which holds the liquid crystal display element between the back surface of the window portion and the light diffusion plate.

[0010]

[Action]

 In this invention, the holder is made of a non-translucent member, and light leakage due to the backlight does not occur. Further, the ear-shaped convex portion of the light diffusing plate is pushed in while following the guide portion of the holder while warping within the elastic limit, and when reaching the concave portion of the holder, the warp is released and is engaged at a predetermined position.

[0011]

【Example】

 Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of an LCD display device according to Embodiment 1, FIG. 2 is a side view, and FIG. 3 is a sectional view. The LCD 1, substrate 2, control IC 3, and lamp 4 are exactly the same as conventional ones. Reference numeral 5 is a holder made of a white opaque resin, 5b is a window, 5c is a tongue piece which is inserted into the hole 2d of the substrate 2 and is attached, 7 is a light diffusing plate, and ear-shaped protrusions. 7a. 5e is a receiving member for the light diffusion plate 7, 5c is a tongue piece, 5g is a concave portion formed on both sides of the holder 5, 5f is a guide portion for guiding the ear-shaped convex portion 7a of the light diffusion plate 7 to the concave portion 5g, and 6 is It is a ground plate having a hole 6a and a tongue piece 6b.

In the above structure, since the holder 5 is formed of the non-translucent member, light leakage due to the backlight does not occur. Further, the ear-shaped convex portion 7a of the light diffusing plate 7 is pushed in while warping within the elastic limit following the guide portion 5f of the holder 5, and when the concave portion 5g of the holder 5 is reached, the warp is released and engaged at a predetermined position. Then, the LCD 1 is sandwiched between the window 5b and the light diffusion plate 7. Therefore, the light diffusion plate 7 is supported by the holder 5 without any play.

Second Embodiment FIGS. 4 to 6 are an exploded perspective view, a side view and a cross-sectional view of an LCD display device according to a second embodiment, in which parts 1 to 4 and 7 are almost the same as those of the first embodiment. However, the hole 2e of the substrate 2 is not provided, and the ground plate 6 is not provided. Reference numeral 8 denotes a holder made of a sheet metal press product, 8a denotes a window portion, 8c denotes concave portions provided on both sides of the holder 8, and the concave portion 8c engages with the ear-shaped convex portions 7a of the light diffusion plate 7. Reference numeral 8b is a guide portion for guiding the ear-shaped convex portion 7a to the concave portion 8c. Reference numerals 8d and 8e denote receiving members of the light diffusing plate 7, and 8f denotes a tongue piece.

In the above structure, the ear-shaped convex portion 7a of the light diffusing plate 7 is engaged with the concave portion 8c via the guide portion 8b and is supported by the receivers 8d and 8e, so that there is no backlash. The LCD 1 is sandwiched between the back surface of the window portion 8a and the light diffusing plate 7, and is connected to the substrate 2 via the terminal 1a. The tongue piece 8f of the holder 8 is inserted into the hole 2d of the substrate 2 and then twisted and soldered. In the second embodiment, the holder 8 is made of a sheet metal press, has no translucency, does not leak light, and does not require the ground plate 6, so that the structure is simple and the cost is low.

[0015]

[Effect of the device]

 As described above, according to the present invention, since the holder and the light diffusion plate are formed separately and the holder is formed of the non-translucent member, light leakage from the peripheral portion of the front surface of the holder does not occur during backlighting. Absent. Further, since the ear-shaped convex portion of the light diffusing plate is engaged with the concave portion via the guide portion of the holder, the light diffusing plate does not rattle.

[Submission date] January 6, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0002

[Correction method] Change

[Correction content]

[0002]

[Prior Art]

FIG. 7 is an exploded perspective view of a conventional LCD display device, in which 1 is an LCD (liquid crystal display element), which has a series of terminals 1a , and the terminals 1a are inserted into the holes 2a of the board 2 and soldered. It is connected to a control IC 3 also mounted on the substrate 2 via a wiring pattern 2b formed above. Reference numeral 4 denotes a lamp, which is inserted into the hole 2c of the substrate 2 and soldered. Reference numeral 5 denotes a holder of the LCD 1, which has a light diffusing plate 5a, a window 5b, and a mounting tongue 5c, and is attached to the hole 2d of the substrate 2 with the LCD 1 sandwiched between the window 5b and the light diffusing plate 5a. A tongue piece 5c is inserted and attached.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a device according to a first embodiment of the present invention.

FIG. 2 is a side view of the device according to the first embodiment of the present invention.

FIG. 3 is a sectional view of the device according to the first embodiment of the present invention.

FIG. 4 is an exploded perspective view of a device according to a second embodiment of the present invention.

FIG. 5 is a side view according to a second embodiment of the devised device.

FIG. 6 is a sectional view according to a second embodiment of the devised device.

FIG. 7 is an exploded perspective view of a conventional device.

FIG. 8 is an exploded perspective view of another conventional device.

FIG. 9 is a cross-sectional view of a conventional device.

FIG. 10 is a cross-sectional view of another conventional device.

[Explanation of symbols]

 1 LCD 1a Terminal 2 Substrate 3 Control IC 4 Lamp 5,8 Holder 5b, 8a Window 5f, 8b Guide 5g, 8c Recess 7 Light diffuser 7a Ear-shaped protrusion

Claims (1)

[Scope of utility model registration request] 1. A liquid crystal display device, a light diffusing plate which has an ear-shaped convex portion and diffuses light, and an opaque member, which has a window portion and the ear-shaped convex portions of the light diffusing plate on both sides thereof. A holder for holding a liquid crystal display element between a rear surface of the window and a light diffusing plate engaged with the concave portion, the holder having a concave portion to be engaged and a guide portion for guiding the ear-shaped convex portion to the concave portion; An LCD display device comprising: an illumination means for illuminating from the back of a diffusion plate; and a substrate having a holder attached thereto and electrically connected to a liquid crystal display element and having a control unit for controlling the liquid crystal display element.