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Flat-panel display embedded with a fingerprint sensor and a method of forming the same

a fingerprint sensor and flat-panel display technology, applied in the field of fingerprint sensors, can solve the problem of contradiction between the fingerprint button and the front surface of the mobile device, and achieve the effect of reducing the risk of accidental touching

Active Publication Date: 2019-03-14
HIMAX TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention aims to provide a flat-panel display that includes a fingerprint sensor. This technology aims to enhance the security of the display and prevent unauthorized access.

Problems solved by technology

Placing a fingerprint button on the front surface of the mobile devices is unfortunately in contradiction with the trend toward a bigger touchscreen that can accommodate more functions as the mobile devices become more powerful.

Method used

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  • Flat-panel display embedded with a fingerprint sensor and a method of forming the same
  • Flat-panel display embedded with a fingerprint sensor and a method of forming the same
  • Flat-panel display embedded with a fingerprint sensor and a method of forming the same

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first embodiment

[0020]FIG. 1 shows a cross-sectional view of a liquid crystal display (LCD) 100 embedded with a fingerprint sensor, which is integrated in an active area of the LCD 100, according to the present invention. The LCD 100 may, for example, a thin-film transistor (TFT) LCD. For better understanding the present invention, only elements pertinent to aspects of the embodiment have been shown.

[0021]In the embodiment, the LCD 100 may include a TFT substrate 11, on a top surface of which a first dielectric layer 12 is formed. The first dielectric layer 12 may, for example, be made of silicon oxide (SiO) and / or silicon nitride (SiN). A plurality of TFTs 13 are formed in the first dielectric layer 12. The TFT 13 may include a polysilicon (abbreviated as poly) layer (as a channel) 131, a first metal layer (as a gate) 132 disposed above the polysilicon layer 131, and a second metal layer (as source and drain) 133 disposed on the polysilicon layer 131 and enclosing the first metal layer 132, where ...

third embodiment

[0034]FIG. 6 shows a cross-sectional view of a light-emitting diode (LED) display 400 embedded with a fingerprint sensor, which is integrated in an active area of the LED display 400, according to the present invention. The LED display 400 may, for example, an active-matrix organic light-emitting diode (AMOLED) display. For better understanding the present invention, only elements pertinent to aspects of the embodiment have been shown.

[0035]In the embodiment, the LED display 400 may include a TFT substrate 11, upon which a first dielectric layer 12 is formed. The first dielectric layer 12 may, for example, be made of silicon oxide (SiO) and / or silicon nitride (SiN). A plurality of TFTs 13 are formed in the first dielectric layer 12 and on the TFT substrate 11. The TFT 13 may include a polysilicon (abbreviated as poly) layer (as a channel) 131, a first metal layer (as a gate) 132 disposed above the polysilicon layer 131, and a second metal layer (as source and drain) 133 disposed on ...

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Abstract

A flat-panel display embedded with a fingerprint sensor includes a substrate, a photo sensor formed on a bottom surface of the substrate, a lens region disposed above and substantially aligned with the photo sensor vertically, and a light barrier substantially aligned with the photo sensor vertically and disposed between the photo sensor and the lens region.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of U.S. Provisional Application No. 62 / 556,129, filed on Sep. 8, 2017, the entire content of which is hereby incorporated by reference.BACKGROUND OF THE INVENTION1. Field of the Invention[0002]The present invention generally relates to a fingerprint sensor, and more particularly to a flat-panel display embedded with a fingerprint sensor.2. Description of Related Art[0003]A mobile device, such as a smartphone, is a computing device small enough to hold and operate in the hand. The mobile device typically has a touchscreen that occupies substantial front surface (e.g., 70%) of the mobile device.[0004]Modern mobile devices may have or be able to perform many functions adaptable to wide variety of purposes such as social interaction, financial transactions, and personal or business communications. With this concern, fingerprint is one of many forms of biometrics used to identify individuals and verify their...

Claims

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Application Information

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IPC IPC(8): G06K9/00G02F1/1335G02F1/1333G02F1/1339G02F1/1368H01L31/0232H01L31/0216H01L31/0368H01L31/18H01L27/32H01L31/103
CPCG02F1/1368G02F1/133526H01L31/02327H01L31/02164H01L31/03682H01L31/182H01L27/3234H01L31/103G02F1/133512G02F2001/133357G02F2001/13398G02F2202/104H01L27/322H01L51/525H01L27/3276H01L2227/323H01L27/124H01L27/1222H01L29/78675H01L27/1248G02F2001/13685G02F1/136286G06K9/0004G02F1/133516G02F1/13338G02F1/13394G02F1/136209G06F1/1601G06V40/1318H10K59/65G02F1/13312G06V10/17H10K59/60G02F1/13398G02F1/13685G02F1/133357H10K50/8428H10K59/38H10K59/131H10K59/1201H10B20/363
Inventor WU, ILIN
Owner HIMAX TECH LTD