JPH0442820Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention relates to a lighting element for a liquid crystal display element used as an auxiliary light source for a liquid crystal display element, and more specifically, it is improved to uniformly illuminate the illumination surface of a liquid crystal display element. The present invention relates to a lighting device.

(B) Prior Art Generally, this type of lighting element is attached to the back or side surface of a liquid crystal display element and is used as an auxiliary light source for the liquid crystal display element.

Conventionally, as shown in FIGS. 5 and 6, this lighting element has a rectangular box-shaped case 2 whose surface facing the liquid crystal display element (not shown) is open and whose interior is filled with transparent epoxy resin 1. A large number of light emitting diodes 3 and LEDs are buried at approximately equal intervals on one long side of the case 2, and the case 2 is made of opaque synthetic resin, with the surface opposite to the open side. is formed of a reflective surface 4 that is inclined at a predetermined angle with respect to the open side surface. Note that 5 is a lead wire connected to each LED 3.

In this lighting element, when each LED 3 emits light in response to an external signal, the light is reflected by the reflective surface 4 and becomes a parallel beam of light, which emits light from the open surface of the case 2, that is, the light emitting surface 6, and illuminates the liquid crystal display element. .

(c) Problems to be solved by the invention However, in the above-mentioned lighting device, the amount of light in each part differs depending on variations in the light-emitting characteristics of the individual LEDs 3 and how the LEDs 3 are installed, so it is difficult to emit light uniformly from the entire light-emitting surface. It was difficult.

This idea was made in view of the above circumstances,
The purpose is to modify the structure so that the entire light emitting surface can emit light uniformly.

(d) Means for solving the problem This invention is a lighting element for a liquid crystal display element.
The connecting member, one side of which is adhered to the back or side surface of a transmissive liquid crystal display element, is composed of a large number of blocks of the same structure made of transparent synthetic resin, and each of these block materials is bonded to the surface on the liquid crystal display side. A reflective layer made of opaque synthetic resin is formed on the entire surface of the opposing surface and the entire surface of the side surface adjacent to and opposite to this surface, and a signal from the outside is buried near the one side surface on which the reflective layer is formed. A light emitting element that emits light by a light emitting element, and an engaging concave portion and an engaging convex portion that are respectively engageably provided on the opposing side surfaces on which the reflective layer is not formed, and further includes a surface of each block material on the liquid crystal display element side. A convex curved surface or an inclined surface is formed on the surface facing the liquid crystal display element so that the light from the light emitting element is reflected as parallel rays to the surface of the block material on the liquid crystal display element side.

(E) Function This invention forms a connecting member by engaging the engaging concave portions of each block material with the engaging convex portions of a block material other than the block material having these engaging concave portions. The light from each light emitting element is reflected by a reflective layer facing the liquid crystal display element side of each block material so that the light is incident on the liquid crystal display element as parallel light rays.

(f) Examples This invention will be described in detail below based on examples shown in the figures.

The illumination element of the liquid crystal display element consists of a connecting member 7 as shown in FIG. 1, and as shown in FIG. It is something. Note that the illumination element may be used by being adhered to the side surface of the liquid crystal display element.

The connecting member 7 is made up of a large number of blocks 9 having the same configuration.
It is made of transparent epoxy resin. In addition, in FIG. 4, 10 is a lead wire of the liquid crystal display element. As shown in FIG. 3, a reflective layer made of an opaque epoxy resin is provided on the entire surface of each block material 9 facing the surface facing the liquid crystal display element 8 and on the entire surface of the two opposite side surfaces adjacent to this surface. 11 is formed by painting or molding, and near one side of the block material 7 on which the reflective layer 11 is formed, there is a light emitting diode 1 as a light emitting element.
2. LED is buried. Each LED 12 has
A lead wire 13 extending outside the block material 9 is connected. Also, the liquid crystal display element 8 of the block material 9
The surface facing the side surface is formed of an inclined surface 14 so that the light from the LED 12 is reflected as parallel rays onto the surface of the block material 9 on the liquid crystal display element 8 side. Note that the surface of the block material 9 on which the inclined surface 14 is formed is not limited to an inclined surface, but may be a convex curved surface. Further, on opposing side surfaces of the block material 9 on which the reflective layer 11 is not formed, an engaging recess 15 and an engaging protrusion 16 are provided, which can be engaged with each other.

When the engagement recesses 15 of each block material 9 configured in this manner are engaged with the engagement protrusions 16 of a block material 9 other than the block material 9 having these engagement recesses 15, a rectangular shape is formed. A plate-shaped connecting member 7 is formed, and as shown in FIG. 4, this is adhered to the back surface of the liquid crystal display element 8 and used as an auxiliary light source for the liquid crystal display element. In this case, the light from each LED 12 is reflected as parallel light rays from within each block material 9 by the reflective layer 11 on the inclined surface thereof, and is emitted from the surface opposite to the inclined surface 14 of each block material 9, that is, the light emitting surface 17. and illuminates the liquid crystal display element 8.

As described above, since the block materials 9 having a large number of illumination elements having the same configuration can be combined after comparing the amount of light from each light emitting surface 17, each light emitting surface 17 can be combined.
It is possible to equalize the light intensity of 7. Further, since each block material 9 is formed to be able to be engaged and connected, a lighting element having a light emitting surface corresponding to the area of the back surface of the liquid crystal display element can be easily assembled without using any special members. Furthermore, from both sides where the LED 12 of each block material 9 is buried,
Since the structure is configured such that light from the light emitting surfaces 17 leaks, it is possible to promote equalization of the amount of light from each light emitting surface 17 when each block material 9 is engaged and connected.

(g) Effects of the invention According to this invention, a lighting element having an area corresponding to the lighting surface of a liquid crystal display element can be easily assembled without using special members. Further, the illumination surface of the liquid crystal display element can be uniformly illuminated.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of this invention, Figs. 2 and 3 are perspective views and cross-sectional views of the block material used in this invention, and Fig. 4 shows the illumination element of this invention as a liquid crystal display element. 5 and 6 are a perspective view and a cross-sectional view of the conventional example. 7... Connection member, 8... Liquid crystal display element, 9...
Block material, 11... Reflective layer, 12... LED (light emitting element), 14... Inclined surface, 15... Engaging recess,
16...Engagement convex portion.

Claims (1)

[Scope of utility model registration request] The connecting member, one side of which is adhered to the back or side surface of a transmissive liquid crystal display element, is composed of a large number of blocks of the same structure made of transparent synthetic resin, and each of these block materials is bonded to the surface on the liquid crystal display side. A reflective layer made of opaque synthetic resin is formed on the entire surface of the opposing surface and the entire surface of the side surface adjacent to and opposite to this surface, and a signal from the outside is buried near the one side surface on which the reflective layer is formed. A light emitting element that emits light by a light emitting element, and an engaging concave portion and an engaging convex portion that are respectively engageably provided on the opposing side surfaces on which the reflective layer is not formed, and further includes a surface of each block material on the liquid crystal display element side. A light emitting element for a liquid crystal display element, wherein a surface facing the light emitting element is formed as a convex curved surface or an inclined surface so that the light from the light emitting element is reflected as parallel rays on the surface of the block material on the liquid crystal display element side.