JPH02264292A - Large-sized liquid crystal display device - Google Patents

Abstract

PURPOSE:To make a display on a liquid crystal screen easy to see and to improve the display quality of the screen by entering a surface state wherein the reflection brightness level of a frame is higher than the transmission brightness level at the time of the black display of the liquid crystal screen. CONSTITUTION:The metallic frame 11 which holds liquid crystal display elements 9 becomes a non-display part when viewed on the whole. When the brightness of the black display on the entire screen where the liquid crystal display elements 9 are arranged on the same plane is, for example, 8nit, the metallic frame 11 is painted in gray so that the reflection brightness level is, for example, 8 - 30nit. Therefore, when the screen is viewed at a distance, the part of an external frame 11 is not conspicuous and the non-display part becomes inconspicuous. Consequently, the screen becomes easy to see and the display quality can be improved.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a large liquid crystal display device.

A conventional liquid crystal display device generally has a structure as shown in FIG. Two transparent substrates 3 having transparent electrodes 2 inside are bonded together with a sealing resin 4 to form a certain gap, and a liquid crystal 1 is sealed inside. Polarizing plates 5 are attached to both sides of the transparent substrate 3, and a diffusing plate 7 is installed on the light source 8 side.

A large-sized liquid crystal display device is constructed by arranging a large number of the above-mentioned liquid crystal display elements on the same plane to form a large screen, as shown in FIG. In FIG. 3, 9 is a liquid crystal display element, and 10 is its display screen.

Problems to be Solved by the Invention In conventional large-sized liquid crystal display devices, each liquid crystal display element has a sealing resin pasted with a transparent electrode on the outside of the display screen and a connection part between the transparent electrode drive circuit. ,
This part became a non-display area and a frame was created outside each display screen. This outer frame formed a grid-like non-display area within the screen of a large liquid crystal display device, making the screen very visible.

The present invention solves these problems by making the non-displayed parts invisible and making the screen easier to see.

Means for Solving the Problem In order to solve this problem, the present invention provides a surface condition for the outer frame of each liquid crystal display element such that the reflected brightness level is at least higher than the transmitted brightness level when black is displayed on the liquid crystal screen. That is.

Here, the reflection brightness level is the reflection of external light expressed in brightness, and is hereinafter referred to as the reflection brightness level.

Effect: With this configuration, when viewing the screen from a distance, the outer frame does not stand out, making the non-displayed parts less noticeable and making the screen easier to see.

Example Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of the present invention. In FIG. 1, numeral 9 denotes a liquid crystal display element, which has the same structure as the liquid crystal display element described in the conventional example.

The metal frame 11 holds the liquid crystal display element, and becomes a non-display part when viewed as a whole. In a large-sized liquid crystal display device in which 16 of these liquid crystal display elements were arranged on the same plane, the luminance when the entire screen was displayed in black was approximately gnit. The metal frame 11 of such a large liquid crystal display device has a reflective brightness level of 3 to 3 Qn.
I painted it a gray color that looks like it.

When an image was displayed on this large liquid crystal display device, when the gold frame had a reflective brightness level of 8 to 20 nits, the transmitted brightness level of the screen and the reflective brightness level of the gold frame were about the same, and the presence of the frame was hardly noticeable.

Generally, a white frame on a black screen is more noticeable than a black frame on a white screen, so if you match the color of the frame to the black screen and make it as gray as can be tolerated on a black screen, it will be more noticeable than a black frame on a white screen. You can also make it less noticeable when you do it. However, even at a reflected luminance level higher than that, the frame is less noticeable than when the transmitted luminance level is lower than that when black is displayed on the display screen.

In this example, the material of the outer frame is metal, and the surface treatment method of the outer frame is painting with gray paint, but the material of the outer frame and the treatment method are not particularly limited to these methods.
A similar effect can be obtained if the material and processing method are such that the reflected brightness level of the outer frame is equal to or higher than the transmitted brightness level of the display screen.

Effects of the Invention As described above, according to the present invention, the surface condition of the frame is such that the reflected brightness level is higher than the transmitted brightness level of the liquid crystal screen when black is displayed, which is a simple and inexpensive method. The outer frame of the liquid crystal display element can be made less noticeable.

As a result, the display on the screen becomes easier to see, and the display quality of the screen can be improved.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a large-sized liquid crystal display device according to an embodiment of the present invention, FIG. 2 is an explanatory diagram showing a conventional liquid crystal display element, and FIG. 3 is an explanatory diagram showing a large-sized liquid crystal display device. 1...Liquid crystal, 2...Transparent electrode, 3...
...Transparent substrate, 4...Seal resin, 5...
... Polarizing plate, 6 ... Color filter, 7.
... Diffusion plate, 8 ... Light source, 9 ...
・Liquid crystal display element, 10...Display screen, 11...
...Gold frame. Name of agent: Patent attorney Shigetaka Awano and one other person

Claims (1)

[Claims] A large number of liquid crystal display elements with liquid crystal sealed between transparent substrates that transmit light from a light source are arranged on the same plane to form a large screen as a whole, and the outer frame of each liquid crystal display element is at least 1. A large liquid crystal display device, characterized in that the surface condition is such that the reflected brightness level is higher than the transmitted brightness level when black is displayed.