Eelectronic equipment with a line detection function

Abstract

The embodiment of the invention discloses electronic equipment with a line detection function. The electronic equipment comprises a cover plate, a first bonding layer, a light guide plate, a second bonding layer and a display panel which are sequentially stacked. The refractive index of the first bonding layer and the refractive index of the second bonding layer are both smaller than the refractive index of the light guide plate. The electronic equipment also includes an image sensor and a light source. Each grating group of the light guide plate comprises a first grating part, a second grating part and a third grating part, and the area of the emergent surface of the third grating part is larger than that of the incident surface of the first grating part. The emitted light of the light source can enter the first grating part through the light incident surface of the first grating part, passes through the second grating part and the third grating part and then is emitted out through the light emergent surface of the third grating part, and the emitted light enters the cover plate and is totally reflected by the top surface of the cover plate or reflected by lines to be measured toform reflected light. The image sensor is used for receiving the reflected light to form image data of the to-be-detected lines. The electronic equipment is relatively high in identification precision.

Description

technical field [0001] The present application relates to the technical field of electronic products, in particular to an electronic device with a texture detection function. Background technique [0002] As a means of identification, fingerprint recognition technology is widely used in various fields due to its convenience and uniqueness, and has gradually become the basic configuration of electronic devices such as smart phones. [0003] At present, the full screen design is the development trend of smart phones. In order to realize a full screen, some manufacturers set up an image sensor under the screen. When the emitted light of the screen is reflected by the user's finger, the image sensor collects the reflected light passing through the screen to form a fingerprint image to complete the identification. However, since the emitted light of the screen has the characteristics of a Lambert light source, an imaging optical path needs to be added between the image sensor an...

AI Technical Summary

Problems solved by technology

The setting of the imaging optical path makes the light that finally enters the image sensor only account for a very small part of the emitted light. Therefore, the smart phone is prone to lack of fingerprint recognition accuracy due to insufficient light collected by the image sensor, and recognition errors or unrecognizable phenomena occur.

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