Display device
A display device and display panel technology, which is applied in the direction of instruments, electrical components, circuits, etc., can solve the problems that noise ultrasonic waves affect the accuracy of fingerprint recognition, and it is difficult to determine ultrasonic waves.
Active Publication Date: 2019-04-05
BOE TECH GRP CO LTD +1
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Problems solved by technology
[0004] However, for multiple ultrasonic fingerprint identification units in the existing ultrasonic fingerprint identification device, it is difficult to determine whether the ultrasonic waves received by each ultrasonic fingerprint identification unit are caused by the finger and the ultrasonic fingerprint identification unit on the display surface of the display device. It may also be reflected by the overlapping part of the orthographic projection on the finger, and it may also be reflected by the adjacent part of the finger, which will cause noise and ultrasonic waves to affect the accuracy of fingerprint recognition.
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[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0029] An embodiment of the present invention provides a display device, such as Figure 1-3 As shown, it includes a display panel 10, and a fingerprint identification structure 20 and a phononic crystal layer 30 stacked with the display panel 10 along the thickness direction of the display panel 10; the phononic crystal layer 30 is arranged above the fingerprint identification structure 20; fingerprint identification The structure 20 includes a plurality of u...
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The embodiment of the invention provides a display device, relates to the technical field of display, and can enable ultrasonic waves to only be transmitted along the thickness direction of a displaypanel, thereby improving the fingerprint identification accuracy. A display device comprises a display panel, a fingerprint identification structure and a phononic crystal layer, wherein the fingerprint identification structure and the phononic crystal layer are stacked with the display panel along the thickness direction of the display panel; The phononic crystal layer is arranged above the fingerprint identification structure; Wherein the fingerprint identification structure comprises a plurality of ultrasonic fingerprint identification units; The phononic crystal layer is provided with a periodic structure for generating ultrasonic phononic forbidden bands in the X direction and the Y direction; The plane where the X direction and the Y direction are located is perpendicular to the thickness direction of the display panel.
Description
technical field [0001] The present invention relates to the field of display technology, in particular to a display device. Background technique [0002] With the development of technology, many display devices begin to have a fingerprint identification function. [0003] Compared with the existing capacitive fingerprint recognition devices, ultrasonic fingerprint recognition devices have the advantages of large sensing area, fast recognition speed, low power consumption, and good waterproof and sweatproof performance, thus becoming a research and development hotspot. [0004] However, for multiple ultrasonic fingerprint identification units in the existing ultrasonic fingerprint identification device, it is difficult to determine whether the ultrasonic waves received by each ultrasonic fingerprint identification unit are caused by the finger and the ultrasonic fingerprint identification unit on the display surface of the display device. It may also be reflected by the over...
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Login to View More IPC IPC(8): G06K9/00H01L27/32
CPCG06V40/1306H10K59/00
Inventor 胡伟频魏从从王纯姜明宵卜倩倩孙晓邱云王丹
Owner BOE TECH GRP CO LTD