Optical lens, light bar, backlight module and display device

By designing an optical lens with a bowl-like structure and reflective grooves, the problem of poor visual uniformity in the existing LED backlight display technology is solved, and a higher longitudinal light exit energy balance and display uniformity are achieved.

CN119717334APending Publication Date: 2025-03-28SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
0 Cites 1 Cited by

Patent Information

Application Number
CN202311279751.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-09-27
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

In the existing LED backlight display technology, the arrangement of an LED light source in a transverse direction leads to poor visual uniformity, especially on large-sized LCD TVs, resulting in poor overall display uniformity.

Method used

An optical lens is designed, which includes a bottom surface, a first reflection surface, a second reflection surface and a lateral exit surface. By setting the first reflection surface as a bowl-shaped structure that is recessed toward the center of the bottom surface, and sags inwardly on the second reflection surface to form a reflection groove. Using the principle of light reflection, some of the original transverse exit light rays are changed to the longitudinal exit, thereby increasing the longitudinal exit energy.

Benefits of technology

By increasing the longitudinal light exit energy, changing the traditional center symmetric light distribution, avoiding the accumulation of transverse light energy, a better longitudinal exit energy balance of the optical lens is achieved, and the visual uniformity of the display device is improved.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention relates to an optical lens, a light bar, a backlight module and a display device. The optical lens comprises a bottom surface; the first reflecting surface and the bottom surface are oppositely arranged, the first reflecting surface is of a bowl-shaped structure sunken towards the center of the bottom surface, in the orthographic projection of the first reflecting surface to the bottom surface, the first length of the first reflecting surface in the first direction is smaller than the second length of the first reflecting surface in the second direction, and the second direction intersects with the first direction; the second reflecting surface is connected with the first reflecting surface, and the second reflecting surface is recessed inwards in the second direction to form a reflecting groove; and the lateral emergent surface is connected with the second reflecting surface and is arranged along the peripheral side of the bottom surface. According to the light reflection principle, part of original transverse emergent light is changed to longitudinal emergent light, so that the longitudinal light emergent energy is improved, the longitudinal emergent energy of the optical lens is further improved, transverse light energy accumulation is avoided, and transverse and longitudinal emergent light distribution is balanced.
Need to check novelty before this filing date? Find Prior Art