JPS63214719A - Transmitting liquid crystal display device - Google Patents

Abstract

PURPOSE:To eliminate unsharpness of picture image, flare, etc., and to enable distinct projection of transmitted light to a shape as desired by forming a light shielding film so as to cover transmitted light at terminal parts of transparent electrodes upto a specified diffusion region. CONSTITUTION:A liquid crystal layer 2 is inserted between a glass substrate 1 having a transparent electrode 4 thereon and a glass substrate 1' having a transparent electrode 4' and a light shielding film 3 formed thereon. The light shielding film 3 is formed in such a manner that an angle theta of light scattering region due to disturbance of orientation of liquid crystals at terminal parts of the electrode 4 is restricted to 7-15 deg. so as the transmitted light may not be influenced by the scattering region. Accordingly, the scattering of light due to disturbance of orientation in a liquid crystal layer 2 is prevented, thus, a distinct projected image is obtd., display image elements are made finer, and the quality of projected image is improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] This is a device that uses a liquid crystal display device, transmits light, and utilizes the transmitted light. This is the field of advanced equipment such as equipment.

[Conventional technology]

In conventional technology, in order to increase the difference between the ON transmittance and the oyy transmittance of a transmissive liquid crystal display device, techniques such as providing a light-shielding film that blocks light from unnecessary parts or adopting a guest-host method are used. Improvements have been made. This is because in a transparent liquid crystal display device, a large difference between the ON transmittance and the oyy transmittance greatly affects the performance of the product. However, in these cases, only the strength of the light in the portion that transmits the light is discussed, and the clarity thereof is not improved.

In other words, with these methods alone, when the light that has passed through the liquid crystal display device is projected onto a screen, etc., the area where the original light was transmitted (for example, the desired shape such as a segment)
Blur, flare, etc. may appear around the area.

[Problem that the invention seeks to solve]

To provide a transmission type liquid crystal display device which can eliminate blur, flare, etc. around an area through which light is transmitted, and can project transmitted light into a desired clear shape.

[Means for solving problems]

A transmissive liquid crystal display device of the present invention includes transparent electrodes formed to sandwich a liquid crystal layer, and at least one light shielding film provided to block transmitted light from areas other than the display portion. The light shielding film is characterized in that it is formed to cover a region where the light beam passing through the end of the transparent electrode is diffused by 7'' to 15 degrees.

〔Example〕

FIG. 1 shows one embodiment, in which a liquid crystal layer is sandwiched between a glass substrate 1 on which a transparent electrode 4 is formed, and a glass substrate 1' on which a transparent electrode 4' and a light-shielding film 5 are formed. ing.

Further, 5 indicates the incident light, and α indicates the area through which the light passes.

Here, 0 indicates the angle of the light scattering region due to disordered alignment of the liquid crystal at the end of the transparent electrode 4, and θ is experimentally #1
It has been confirmed that the angle is 0°, and a light shielding film is formed so that the transmitted light is not affected by this scattering region.

FIG. 2 shows another embodiment, and the basic configuration is the same as that in FIG. 1. However, the light shielding film 3 is formed on the outside of the glass substrate on the incident light side. As in FIG. 1, a light shielding film is formed so that the transmitted light is not affected in the angle range of θ.

FIG. 5 shows yet another embodiment, the basic configuration of which is the same as that of FIG. 1. 14, a light shielding film 5 is formed on the liquid crystal layer 2 side of the glass substrate on the side facing the incident light. In this case as well, the light shielding film 3 is formed so that the transmitted light is not affected in the angle range of θ.

FIG. 4 shows yet another embodiment, the basic configuration of which is the same as that of FIG. 1. What differs from FIG. In this case, as in FIG. 1, the light shielding film 3 is formed at a position and dimension where transmitted light is not affected in the angular range θ.

〔Effect of the invention〕

In a liquid crystal display device, transmission is the basic performance, and the most important characteristic, along with the ratio of ON transmittance and 011 transmittance, is that the transmitted light has the desired shape and has a clear shape. be.

According to the present invention, scattering of light due to disordered orientation in the liquid crystal layer can be prevented, and a clearer projected image can be obtained.

This can be expected to result in finer display pixels and improved projected image quality.

[Brief explanation of the drawing]

FIG. 1, FIG. 2, FIG. 5, and FIG. 4 are diagrams showing embodiments of the present invention. 1 and 1' are glass substrates, 2 is a liquid crystal layer, 3
is a light-shielding film, 4 and 4' are transparent electrodes, 5 is incident light, α
is the area of transmitted light, and 0 is the angle of the scattering area due to disordered liquid crystal alignment. (Each above)

Claims (1)

[Claims] In a transmissive liquid crystal display device including transparent electrodes formed to sandwich a liquid crystal layer, and at least one light-shielding film provided to block transmitted light from areas other than the display area, the light-shielding film is located at an end of the transparent electrode. 1. A transmissive liquid crystal display device, characterized in that it is formed so as to cover a region where light rays passing through it are diffused by 7° to 15°.