Display and input device

Abstract

The embodiment of the invention discloses a display and input device. The display and input device comprises a display panel comprising a display array composed of a plurality of display pixels; a fingerprint sensing module comprising a sensing array consisting of a plurality of photosensitive pixels. The fingerprint sensing stage comprises at least one frame of image display period, continuous refreshing is carried out for m times in one frame of image display period, and in each refreshing period, display pixels in a first display area emit the same color spectrum and illuminate the fingerprint; in two adjacent refreshing periods, the display pixels in the first display area emit different color spectrums; in the display period of one frame of image, the second display area displays thesame image content; in a frame of image display period, the fingerprint sensing module collects fingerprint images of different colors and is used for synthesizing a color fingerprint image or a multispectral fingerprint image. According to the embodiment of the invention, a high-sensitivity color fingerprint image can be obtained.

Description

technical field [0001] Embodiments of the present invention relate to display technologies, and in particular, to a display and input device. Background technique [0002] With the expansion of the application market of mobile terminals with integrated fingerprint detectors in the display screen, users have put forward higher, more special or more refined technical requirements for the performance of fingerprint detectors, such as judging real and fake fingers. [0003] At present, the effective way for fingerprint detectors to identify real and fake fingers is to collect a series of dynamic color fingerprint images, from which the dynamic information of blood diffusion in capillaries on the lower surface of the skin caused by finger pressing is extracted to judge real and fake fingers. Therefore, the key for fingerprint detectors to identify real and fake fingers is to obtain high-quality multiple color fingerprint images in a short time. [0004] However, the top of the e...

AI Technical Summary

Problems solved by technology

[0004] However, the existing fingerprint detector is covered with a filter that can only pass monochromatic light to collect color fingerprint images, resulting in a reduction of as much as 70% in the intensity of light that can be detected

For a display device equipped with a display color filter, it may be possible to align the sub-pixels of the display array with the fingerprint detector up and down, and multiplex the display color filter into a monochromatic light filter required by the fingerprint detector, In this way, the monochromatic light filter covering the fingerprint detector can be omitted, but the manufacturing process of this structure is complicated. Even if it can be aligned, the reflected light of the finger will pass through multiple times in the glass substrate of the thicker color filter. Lateral diffusion due to reflection and refraction, causing color mixing in the color image reaching the fingerprint detector

It will eventually affect the quality of the color fingerprint image detected by the fingerprint detector, thereby affecting the judgment result and even leading to various misjudgments

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