JP2532360B2 - Large LCD display - Google Patents

Description

TECHNICAL FIELD The present invention relates to a large-sized liquid crystal display used as a large-screen display for guidance and advertising at stations, airports, etc., and for projection in halls, theaters, etc.

Conventional configuration and its problems Liquid crystal displays have been widely used in watches and calculators since they can be displayed with low power.
Then, recently, a large-sized liquid crystal display including a large number of liquid crystal display elements has been developed. This is to meet the public and social needs of providing information to a large number of people at once.

The configuration of the liquid crystal display element that constitutes such a large-sized liquid crystal display will be described with reference to FIG.

In this liquid crystal display element, a sealing resin 2 is arranged around two glass plates 1a and 1b which transmit light from a light source to form a constant gap, and a liquid crystal 3 is enclosed inside the gap. In addition, the two glass plates 1a and 1b have transparent electrode lead-out portions 4a and 4b.
The electrode lead-out portions 4a and 4b are connected to a drive circuit (not shown). Polarizing plates 5a and 5b are attached to both outer surfaces of the glass plates 1a and 1b.
A diffusion plate 7 is attached to the light source 6 side.

A large-sized liquid crystal display is constructed by arranging a large number of the above liquid crystal display elements on the same plane to form a large screen. FIG. 2 shows a large-sized liquid crystal display configured as described above, and a large number of liquid crystal display elements 8 having the above-described configuration are arranged. In FIG. 2, reference numeral 9 is a joint between adjacent liquid crystal display elements 8, and 10 is a lead wire for connecting the electrode lead-out portions 4a and 4b to the drive circuit. Here, the electrode extraction portion 4a side is also drawn and connected to the electrode extraction portion 4b side.

However, in such a conventional large-sized liquid crystal display, the seal resin 2 and the electrode lead-out portions 4a and 4b located at the joint 9 are confirmed from the front surface (the side opposite to the light source 6), which is the liquid crystal display element. The frame of No. 8 was formed, and as a result, there was a situation where a grid-shaped non-display line was visible on the large-sized liquid crystal display. For this reason, it is difficult to see the image on the entire screen, which is the biggest factor that prevents the spread of large-sized liquid crystal displays.

An object of the present invention is to solve such a conventional problem, and to display a sealing resin portion and an electrode lead-out portion located at a joint of a plurality of liquid crystal display elements up to a brightness level of the liquid crystal display element. It is intended to provide a large-sized liquid crystal display that can be realized.

To achieve this object, a large-sized liquid crystal display of the present invention drives a transparent seal resin portion located at a joint of a plurality of liquid crystal display elements arranged on the same plane and / or the liquid crystal display element thereof. For the electrode lead-out portion connected to the circuit for, an auxiliary liquid crystal display element that gives a light amount from the light source direction to the seam, and a reflective film having a high reflectance that guides light rays from the auxiliary liquid crystal display element to the seam. It is provided with a covered light guide having a high transmittance.
According to this configuration, since the amount of light is supplied to the seal resin portion and the electrode lead-out portion located at the joint of the plurality of liquid crystal display elements, the grid-shaped non-display line does not appear, so that the uneven brightness of the entire liquid crystal display is prevented. The video on the entire screen becomes good.

Description of Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. Here, in the embodiment of the present invention, the same parts as those in the conventional example are designated by the same reference numerals and the description thereof will be omitted.

3 to 5 show an embodiment of the present invention. First, a large number of liquid crystal display elements 8 having the above structure are arranged on the same plane,
It is the same as the conventional example that a plurality of light sources 6 are arranged on the back side. However, in the present invention, it is necessary to use, as the sealing resin 2 located at the joint 9 of the liquid crystal display element 8, one having a high transmittance. On the light source 6 side, auxiliary liquid crystal display elements 11 for giving a quantity of light from the light source direction to the joints 9 are provided in the same number as the joints 9, and the auxiliary liquid crystal display elements 11 to 9 are jointed. Similarly, a plurality of light guides 12 for guiding the respective rays of light are provided. The light guide 12 has a high reflectance by covering a solid 13 having a high transmittance such as acrylic and glass, and a metal 13 such as aluminum, gold and silver or an acrylic resin containing a white pigment such as titanium oxide around the solid 13. It is composed of a reflective film 14.

The auxiliary liquid crystal display element 11 has the same configuration as the liquid crystal display element 8 described above, and its electrode lead-out portion is connected to a drive circuit (not shown) by a lead wire 15. . Here, the circuit for driving each auxiliary liquid crystal display element 11 and the circuit for driving each liquid crystal display element 8 are configured to drive both liquid crystal display elements 8 and 11 in synchronization with each other. Both are driven by one drive circuit.

Further, since the auxiliary liquid crystal display element 11 and the light guide 12 are respectively arranged at the joints 9, the light amount of the auxiliary liquid crystal display element 11 is passed through the light guides 12 to the joints 9.
Therefore, simultaneously with the display by the liquid crystal display element 8, the display by the auxiliary liquid crystal display element 11 can be performed at the joint 9 in conjunction with the display. At this time, the amount of light on the supply side can be adjusted by adjusting the size of the end surface of the light guide 12 on the light source 6 side.

When one auxiliary liquid crystal display element 11 displays a plurality of picture elements, the light guide 12 is composed of one light guide 12 made up of the same number of light guides as the picture elements.

FIG. 6 shows another embodiment of the present invention, each light guide.
A hollow 12a is provided on the inner surface of the tip of the liquid crystal display 12, and the liquid crystal display element 8 is held by the hollow 12a. That is, the light guide 12 has the function of the frame body of the liquid crystal display element 8.

When the sealing resin 2 located at the joint 9 of the liquid crystal display element 8 becomes extremely narrow and the electrode lead-out portions 4a and 4b do not exist there, the auxiliary liquid crystal display element 11 and the light guide are provided at the joint 9 portion. Of course, it is not necessary to provide 12.

The large-sized liquid crystal display of the present invention is configured as described above, and the auxiliary liquid crystal display element and the light guide are provided in the seal resin portion and the electrode extraction portion located at the joint of the plurality of liquid crystal display elements. Since the light quantity is supplied, the grid-shaped non-display lights do not appear, the brightness mirror of the entire liquid crystal display is eliminated, and the image on the entire screen can be made good. Further, by using the light guide as a frame of the liquid crystal display element, workability can be improved and cost can be reduced. INDUSTRIAL APPLICABILITY The large-sized liquid crystal display of the present invention has a high industrial utility value as a large-screen display for the guidance of stations, airports, etc., which is expected to increase in demand in the future, and for public announcement.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a general liquid crystal display element, FIG. 2 is a schematic configuration diagram of a conventional large-sized liquid crystal display, and FIG. 3 is a schematic configuration diagram showing an embodiment of a large-sized liquid crystal display according to the present invention. FIG. 4 is a schematic configuration diagram seen from the upper surface of the main part,
FIG. 5 is an enlarged perspective view of a light guide constituting the same display, and FIG. 6 is a schematic configuration view of another embodiment of the large-sized liquid crystal display according to the present invention as seen from above. 1a, 1b …… glass plate, 2 …… seal resin, 3 …… liquid crystal, 4
a, 4b ... Electrode extraction part, 6 ... Light source, 8 ... Liquid crystal display element, 9 ... Seam, 11 ... Auxiliary liquid crystal display element, 12 ...
Light guide, 13 ... Solid, 14 ... Reflective film.

Claims (2)

(57) [Claims] 1. A large number of liquid crystal display elements, each of which has a liquid crystal disposed between glass plates that transmit light from a light source, are arranged on the same plane, and a transparent sealing resin portion and / Alternatively, an auxiliary liquid crystal display element that gives a light amount from the light source direction to the seam to an electrode lead-out portion connected to a circuit for driving the liquid crystal display element, and a light beam from the auxiliary liquid crystal display element to the seam is guided. A large-sized liquid crystal display, which is provided with a light guide in which a solid having a high transmittance is covered with a reflective film having a high reflectance. 2. A large liquid crystal display according to claim 1, wherein the liquid crystal display element is held by a light guide.