Optical element and reflection-type liquid crystal display system using same

Abstract

The invention provides an optical element, used in a reflection-type liquid crystal display system. The optical element comprises a base material, and a plurality of prisms which are formed on the base material and arranged along a first direction in sequence. Any one of the plurality of prisms is formed by a plurality of sub-prisms which are arranged along the first direction in sequence, refractive index of the plurality of sub-prisms decreasing in sequence. Through adding a prism array system formed by the plurality of prisms between a power supply and a reflection-type liquid crystal panel, each prism is formed by the plurality of sub-prisms, and the refractive index of the plurality of sub-prisms decreases from a near light end to a distance light end gradually, so that an angle of emergent light of a light source can be reduced, energy of available light entering the reflection-type liquid crystal display system is enhanced, and light utilization rate and screen brightness of a reflection-type liquid crystal display panel are improved.

Description

technical field [0001] The present disclosure relates to the display field, in particular, to an optical element and a reflective liquid crystal display system using the same. Background technique [0002] In the traditional reflective liquid crystal display system, the side-light light guide plate is used as the front light source system, and most of the outgoing light is light in a large-angle direction. In this way, the light entering the liquid crystal glass is also light in a large-angle direction. Finally, the three-color light reflected back will not be able to enter the color film of the corresponding color because of the relatively large reflection angle, so a lot of light energy will be lost. [0003] There are also some reflective liquid crystal display systems that add multi-layer specially designed scattering films to reduce the large-angle outgoing light direction of the side-light light guide plate. The direction of light to control is limited, and the angle ...

AI Technical Summary

Problems solved by technology

[0002] In the traditional reflective liquid crystal display system, the side-light light guide plate is used as the front light source system, and most of the outgoing light is light in a large-angle direction. In this way, the light entering the liquid crystal glass is also light in a large-angle direction. Finally, the three-color light reflected back will not enter the color film of the corresponding color because of the relatively large reflection angle, so a lot of light energy will be lost

[0003] There are also some reflective liquid crystal display systems that add multi-layer specially designed scattering films to reduce the large-angle outgoing light direction of the side-light light guide plate. Controlled light direction is limited, and the angle of change is not very ideal

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