JPS5815954Y2 - Panel holder for liquid crystal display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a panel holder for a liquid crystal display device that diffuses and reflects light to uniformly illuminate the entire display area.

Conventionally, a mounting structure of a liquid crystal display device in a digital watch or the like has been constructed as shown in FIGS. 1a and 1t).

To explain this in more detail in the same figure, on the wiring board 1,
A box-shaped panel holder 2 with an opening at the center of the top surface is fixed with a set screw or the like, and a liquid crystal display device 3 is mounted inside this panel holder 2.

The liquid crystal display device 3 includes a pair of transparent glass plates 4 and 5 arranged in parallel with a spacer 6 in between.
, 5, and a liquid crystal γ having positive dielectric anisotropy is sealed between the glass plates 4 and 5, and the surfaces of the glass plates 4 and 5 facing the liquid crystal 7 are provided with a plurality of transparent conductive films (
(not shown) is formed.

Further, deflecting plates 8 and 9 are attached to the upper surface of the glass plate 4 and the lower surface of the glass plate 5, respectively, and below the deflecting plate 9, an acrylic light guide 10 having a light diffusion function is placed on the wiring board 1. It is fixed and installed.

A gap 10a is formed in the center of the acrylic light guide 10, and a light source 11 for illuminating the display section is housed in the gap 10a, and the entire upper surface of the acrylic light guide plate 10 diffuses the light from the light source 11. For this purpose, a white printing layer 12 is provided.

The plurality of transparent conductive films provided on the glass plates 4 and 5 are as follows:
They are connected to transparent terminal groups 13 formed on the upper and lower ends of the back side of the glass plate 4, and these terminal groups 13 and corresponding terminal groups 14 formed on the wiring board 1 are non-conductive. They are electrically connected to each other by a plurality of conductive silicones 16 that are attached to a conductive rubber material 15 and constitute a silicone conductive connector 17.

However, in such a mounting structure of the liquid crystal display device 3, the light source 11 must be formed separately from the panel holder 2 such as the acrylic light guide plate 10 on which the light source 11 is mounted.
The structure is complicated, which makes manufacturing and assembly work troublesome, and since the liquid crystal display device 3 is disposed above the acrylic light guide plate 10, there is a drawback that a lot of light is absorbed and scattered, resulting in a decrease in transmittance. Ta.

In particular, when the light transmittance decreases, not only does the display area A become dark and it becomes difficult to tell the time, but also the amount of light decreases, meaning that the central area and the peripheral area corresponding to the light source 11 are not evenly illuminated. This caused the inconvenience of becoming even more difficult to read the time.

The present invention has been improved in view of these conventional drawbacks, and provides a panel holder for a liquid crystal display device that has a simple structure and is capable of uniformly irradiating the entire display area with a sufficient amount of light. It is.

The present invention will be explained in detail below based on the drawings.

Fig. 2 is a perspective view from above of a panel holder on which the liquid crystal display device according to the present invention is mounted, Fig. 3 is a perspective view of the panel holder from below, and Fig. 4 shows the mounting state of the liquid crystal display device. FIG.

In the figure, the same components as those in FIGS. 1a and 1b are designated by the same reference numerals.

In these figures yC, the panel holder 20 is integrally formed with an insulating transparent synthetic resin in the shape of a disconnected circuit. One longitudinal side of the panel holder 20 is cut out and opened, and a pair of glasses are inserted from the open end 21. plates 4, 5 and this glass plate 4, 5
A liquid crystal display device 3 consisting of a liquid crystal 7 sealed therebetween and deflection plates 8 and 9 are mounted.

The liquid crystal display device 3 is mounted on the lower part of the inner wall surface of both upper and lower sides 22 and 23 of the panel holder 20, facing each other.
The protrusions 24a, 24b and 25a, 2 that hold the
5b is integrally provided in a protruding manner.

Further, a light source storage portion 27 having a recess 26 for storing the light source 11 is provided approximately at the center of the side surface 23 of the panel holder 20.
are integrated.

Furthermore, the panel holder 20 has a transparent display section 28 provided substantially in the center of its upper surface corresponding to the display section A of the liquid crystal display device 3, and a satin pattern on the back surface of the surface other than the transparent display section 28. The light diffusing section 29 and the side surface 22 having a light diffusing function and the transparent display section 28 provided by applying
An elongated hole 30 is formed in the surface portion between, and this elongated hole 30
It has a reflective part 32 formed by cutting off an end surface 31 on the side of the transparent display part 28 at approximately 45 degrees.

Projections 24a and 24 provided on the panel holder 20
Silicon conductive connectors 17 and 17 are respectively disposed between 25a and 25b so as to sandwich the glass plate 5 of the liquid crystal display device 3, and transparent terminal groups 13 are formed at both upper and lower ends of the back side of the glass plate 4. and a terminal group 14 formed on the wiring board 1 are electrically connected by conductive silicon 16.

In addition, the height 3 of this silicon conductive connector 17.17 is formed to be slightly larger than the dimension from the back surface of the glass plate 4 to the lower edge of the panel holder 20, so that the panel holder 20 can be mounted on the wiring board 1 with a set screw. When fixed, it is compressed, thereby making the connection between the terminal group 13 and the terminal group 14 more reliable, and preventing the liquid crystal display device 3 from wobbling.

Note that 33 is a screw hole for fixing the panel holder 20.

In such a configuration, a part of the light emitted from the light source 11 passes through the panel holder 20 and is reflected by the aluminum foil 34 attached to the back surface of the deflection plate 9, so that a part of the light emitted from the light source 11 passes through the panel holder 20 and is reflected by the aluminum foil 34 attached to the back surface of the deflection plate 9. irradiate.

Also, a part of the light passing through the panel holder 20 is transmitted to the light diffusing section 2.
9, it is diffusely reflected and diffused throughout the panel holder 20, and this diffused light also reaches the transparent display section 2.
8 reaches the reflecting section 32, where a portion is reflected and irradiates the transparent display section 28 again.

Therefore, according to the above configuration, the light emitted by the light source 11 is effectively diffused and reflected so that the entire surface of the transparent display section 28 of the panel holder 20 is irradiated twice, so that the loss of light is reduced. The entire surface of the transparent display section 28 can be uniformly irradiated.

Therefore, there is no risk that the part near the light source 11 will shine particularly strongly, and a good display effect can be obtained.Furthermore, the panel holder 20 also functions as an acrylic light guide in the conventional structure described above. Therefore, the overall structure is simple, the number of parts can be reduced, and manufacturing and assembly operations are easy.

In addition, in the above embodiment, the satin pattern was applied only to the back side of the panel halter 20 and the light diffusing part 29 was provided, but the present invention is not limited to this, and a similar light diffusing part may be provided on the front side or on both the front and back sides. Of course.

As explained in detail above, according to the panel holder for a liquid crystal display device according to the present invention, it is integrally formed with a transparent member,
A light source storage section is provided on the side surface of the panel holder, and the light source is stored therein, and a transparent display section is provided on the surface portion corresponding to the display section of the liquid crystal display device mounted on the panel holder, and the transparent display section and the light source storage section are provided on the surface portion corresponding to the display section of the liquid crystal display device mounted on the panel holder. A light diffusing part having a light diffusing function is provided on the surface part between the parts, and an elongated hole is formed between the transparent display part and the side surface opposite to the side surface where the light source storage part is provided. Since the reflective portion is provided at the edge on the display side, the light from the light source can be diffused and the entire surface of the transparent display portion can be illuminated.

In addition, since the light reflected by the reflective part imitates the transparent display part again, such double irradiation allows the transparent display part to be illuminated more evenly, and a good display effect can be obtained. .

In addition, the panel holder does not simply mount the liquid crystal display device (it also has the function of accommodating the light source and the function of diffusing and reflecting light, so the overall configuration is simple.
This has the practical effect of reducing the number of parts and providing the entire device at low cost.

[Brief explanation of drawings]

Fig. 1 shows an example of a conventional liquid crystal display device mounting structure, a is a perspective view thereof, b is a sectional view taken along the line I-I of a, and Fig. 2 is an example of a panel holder for a liquid crystal display device according to the present invention. FIG. 3 is a perspective view of the panel holder seen from below, and FIG. 4 is a vertical sectional view showing the mounting state of the liquid crystal display device. 1...Wiring board, 3...Liquid crystal display device, 11...Light source, -20...Panel holder, 27...Light source storage Part, 28...
・Transparent display section, 29...Light diffusion section, 30...
...Elongated hole, 32...Reflector, A...
Display section.

Claims (1)

[Scope of utility model registration request] A panel holder for mounting a liquid crystal display device is integrally formed with a transparent member, and this panel holder includes a transparent display portion provided on a surface portion corresponding to the display portion of the liquid crystal display device, and a transparent display portion provided on a surface portion corresponding to the display portion of the liquid crystal display device, and a transparent display portion provided on a surface portion corresponding to the display portion of the liquid crystal display device, and a transparent display portion provided on a surface portion corresponding to the display portion of the liquid crystal display device, and A light source storage section provided in the section,
a light diffusion section provided in a surface portion between the side surface on the light source storage section side and the transparent display section, and the transparent display section;
An elongated hole is formed between the side surface where the light source storage section is provided and the opposite side surface, and the reflective section is formed by cutting off the end surface of the elongated hole on the transparent display section side diagonally. Panel holder for liquid crystal display devices.