A screen and terminal

Abstract

Embodiments of the present application provide a screen and a terminal, which relate to the technical field of terminals, and can realize optical fingerprint imaging in an OLED screen, thereby realizing full-screen fingerprint detection. The specific solution is: the screen 500 includes a contact layer 51 , an infrared cutoff layer 52 and a plurality of image sensors 53 . The infrared cut-off layer 52 is arranged between the upper surface of the contact layer 51 and a plurality of image sensors 53. The infrared cut-off layer 52 is used to prevent infrared light from passing through. The infrared cut-off layer 52 is provided with a plurality of openings 520, and the contact layer 51 is used for Therefore, when the target is in contact with the upper surface of the contact layer 51, the infrared light on the contact interface between the target and the upper surface is reflected and / or scattered back into the contact layer 51, and the opening 520 is used to make the contact The infrared light reflected and / or scattered back to the inside of the contact layer 51 by the interface passes through to be projected on the image sensor 53 for imaging. The embodiment of this application is used for imaging.

Description

technical field [0001] The embodiments of the present application relate to the technical field of terminals, and in particular, to a screen and a terminal. Background technique [0002] Fingerprint recognition is an important application and function of current mobile phones. Full-screen fingerprint sensing is the development trend of future mobile phone fingerprint sensors. The goal is to realize fingerprint detection in any area on the mobile phone screen. Full-screen fingerprint detection can increase the screen-to-body ratio of mobile phones, realize full-screen mobile phones, and provide users with a better fingerprint unlocking experience. [0003] The mobile phone screen mainly includes a liquid crystal display (liquid crystal display, LCD) screen and an organic light-emitting diode (organic light-emitting diode, OLED) screen. Among them, the OLED screen uses organic polymer materials as the light-emitting layer, which can realize self-luminescence. [0004] For th...

AI Technical Summary

Problems solved by technology

but see figure 2 The cross-sectional view of the light emitting layer 20 in the OLED screen 01 shown and image 3 In the top view of the light-emitting layer 20 shown, since the light-emitting layer 20 includes a translucent common cathode 21, an opaque light-emitting pixel 22, a reflective metal anode 23, and a partially light-transmitting metal thin film transistor (thinfilm transistor, TFT) trace 24, thus The overall light transmittance of OLED screen 01 is limited, which can only reach 3% to 10%. Therefore, the light energy utilization rate of fingerprint imaging is low, and the sensitivity of the image sensor is high.

Currently, high-sensitivity image sensors all use silicon-based complementary metal oxide semiconductor (CMOS) or charge-coupled device (CCD), and the cost of large-area full-screen fingerprint imaging is very high.

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