Direct type LED display module and LED display screen
A display module and direct-type technology, applied in nonlinear optics, instruments, optics, etc., can solve the problems of interference fringes that are easy to appear in the enhancement film, and achieve the effect of avoiding interference phenomenon
Pending Publication Date: 2020-12-01
深圳市康冠科技股份有限公司
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Problems solved by technology
[0003] The embodiment of the present invention provides a direct-lit LED display module and LED display screen, aiming to solve the problem of interference fringes that are prone to appear when using a brightness enhancement film
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[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0020] It should be understood that the terminology used in the description of the present invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the present invention. As used in this specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plu...
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Abstract
The invention discloses a direct type LED display module and an LED display screen. The direct type LED display module comprises a lower brightness enhancement film, an upper brightness enhancement film and a lower Polaroid, wherein the upper brightness enhancement film is arranged above the lower brightness enhancement film, and the lower polaroid is arranged above the upper brightness enhancement film; a plurality of parallel sawtooth-shaped grooves are formed in the upper surface of each of the lower brightness enhancement film and the upper brightness enhancement film; the sawtooth-shapedgrooves of the lower brightness enhancement film are perpendicular to the sawtooth-shaped grooves of the upper brightness enhancement film; and the direction of the sawtooth-shaped grooves of the lower brightness enhancement film is parallel to the light transmission axis of the lower polaroid. According to the direct type LED display module, the upper brightness enhancement film and the lower brightness enhancement film are perpendicular to each other, and the rotating angle direction of the upper brightness enhancement film is parallel to the light transmission axis of the lower polaroid, sothat the effect of avoiding the interference phenomenon is achieved.
Description
technical field [0001] The invention relates to the display field, in particular to a direct-lit LED display module and an LED display screen. Background technique [0002] In the optical design process of the liquid crystal display module, in order to achieve higher brightness requirements, corresponding optical films are required. In the general design process, the brightness enhancement film is the most important optical material. Although in the backlight display module, there are many ways to improve the overall brightness, such as using DBEF (DBEF is a reflective polarizer, which selectively reflects the light of the backlight system so that it is not absorbed by the lower polarizer of the LCD , so that part of the light in the full viewing angle of the liquid crystal display can be reused.) Or choose more LED arrangements, but the cost of DBEF is higher, and increasing the number of LEDs will increase the backlight power and affect energy efficiency. When choosing a ...
Claims
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IPC IPC(8): G02F1/13357G02F1/1335
CPCG02F1/133528G02F1/133603G02F1/133606
Inventor 陈帅陈茂华秦志明金光
Owner 深圳市康冠科技股份有限公司