Array substrate and preparation method therefor, display panel and display apparatus

Abstract

The invention discloses an array substrate and a preparation method therefor, a display panel and a display apparatus, and belongs to the display field. The array substrate comprises multiple pixel units, a reading signal line, a first gate electrode signal line, a second gate electrode signal line, a data line and a shielding signal line, wherein each pixel unit comprises three sub pixel units; each sub pixel unit comprises a display sub unit; at least one pixel unit also comprises a palmprint recognition sub unit; the shielding signal line is parallel to the reading signal line; one end of the shielding signal line is grounded while the other end of the shielding signal line is connected with the input end of the first gate electrode signal line; the corresponding display sub units are connected with the first gate electrode signal line and the data line; and the palmprint recognition unit is connected with the second gate electrode signal line and the reading signal line. According to the array substrate, due to the addition of the shielding signal line, the interference on the reading signal line from the grid electrode signal lines can be reduced, stray capacitance can be prevented from being generated on the reading signal line, and the palmprint recognition effect is improved.

Description

technical field [0001] The present invention relates to the field of display technology, and in particular, to an array substrate and a preparation method thereof, a display panel and a display device. Background technique [0002] With the development of information technology, information security has become particularly important. In modern life, more and more users store bank card information, contact information, mailbox information and other information in the display for convenience of use. In order to better protect privacy, users hope that the display also has an identity recognition function while realizing the display function. As an emerging biometric technology, palmprint recognition has been widely used in displays due to its advantages of simple sampling, rich image information, not easy to forge, and less interference from the environment. [0003] However, due to factors such as the size of the display and the fabrication process, the gate signal lines use...

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Problems solved by technology

[0003] However, limited by factors such as the volume of the display and the manufacturing process, the gate signal lines used to turn on the display subunits in the pixel unit are always scanned row by row. When the read signal lines used for palmprint recognition read signals , the gate signal line will affect the reading signal line, causing the reading signal to be unstable and generating parasitic capacitance, which greatly affects the palmprint recognition effect

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