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Backlight module applied to display panel

A technology of backlight module and display panel, which is applied in the directions of optics, nonlinear optics, character and pattern recognition, etc., and can solve problems such as image sensing

Inactive Publication Date: 2020-05-29
EGIS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the CIS module is placed under the light-enhancing film and the light guide plate of the backlight module, there is an anti-reflection coating (Anti-Reflection Coating, ARC) in the backlight module, which allows visible light to be fully reflected, so the visible light reflected from the finger Unable to penetrate and reach the CIS module, causing image sensing problems

Method used

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  • Backlight module applied to display panel
  • Backlight module applied to display panel
  • Backlight module applied to display panel

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Embodiment Construction

[0083] The author of this case found that infrared (IR) can penetrate the above-mentioned ARC. In this way, the IR is printed on the finger, and the finger reflects the IR and passes through the cover glass, display panel and backlight module to be received by the CIS module. , to achieve fingerprint sensing. However, if you want to print the IR from the bottom of the backlight module to the finger, the IR goes up and passes through the backlight module, and the IR goes down through the backlight module. In this way, the outgoing IR is blurred, and the reflected IR is also blurred, so that the image of the sensed fingerprint is blurred. If you want to transmit IR to the finger from the front, there will be many interference problems to be solved.

[0084] This case proposes four design architectures to achieve the IR emission to the finger. The first one is about side lighting, where IR is emitted from one side of the protective glass (cover glass), where an ARC can be set u...

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Abstract

A backlight module applied to a display panel at least comprises a light guide plate and a visible light source. The light guide plate cooperates with an infrared light source to generate infrared light. The visible light source is arranged on one side of the light guide plate and emits light rays to enter the light guide plate to advance so as to generate visible light. Therefore, light requiredby information display and biological sensing can be provided.

Description

[0001] cross reference [0002] This application was submitted on September 16, 2019 in accordance with 35 U.S.C. §119, and the U.S. provisional application 62 / 900,812 with the title of invention "IR LEDLIGHTING INTEGRATED WITH LGP IN LCD FOD SOLUTION" was filed on November 26, 2019. Priority to U.S. Provisional Application 62 / 940,445, entitled "LGP FINGERPRINT APPLICATION RULER," and the above application is incorporated by reference. technical field [0003] The present invention relates to an electronic device with an under-screen infrared biosensor, and in particular to an electronic device with an under-screen infrared biosensor that can be applied to liquid crystal displays (Liquid Crystal Display, LCD) and OLEDs. Electronic devices for devices, and backlight modules for display panels. Background technique [0004] Today's mobile electronic devices (such as mobile phones, tablet computers, laptops, etc.) are usually equipped with user biometric systems, including di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1335G02F1/13357G02F1/1333G09F9/30G06K9/00
CPCG06F3/042G06V40/1318
Inventor 傅同龙王伟榕周正三
Owner EGIS TECH