Fingerprint pixel circuit and electronic equipment
A pixel circuit and electronic device technology, applied in the field of communication, can solve the problems that LCD optical fingerprint technology cannot be realized, LCD screen cannot emit light, etc.
Active Publication Date: 2020-06-12
VIVO MOBILE COMM CO LTD
View PDF6 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The embodiment of the present invention provides a fingerprint pixel circuit and electronic equipment to solve the problem that the traditional LCD screen cannot emit light automatically and the LCD optical fingerprint technology cannot be realized
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0020] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be more thoroughly understood, and will fully convey the scope of the present invention to those skilled in the art.
[0021] like figure 1 As shown, an embodiment of the present invention provides a fingerprint pixel circuit, including: a first thin film transistor N1, the source of the first thin film transistor N1 is connected to a data line;
[0022] a second thin film transistor N2, the source of the second thin film transistor N2 is connected to the data line;
[0023] a third thin film transistor N3 connected to the drain of the second t...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a fingerprint pixel circuit and electronic equipment, and the circuit comprises a first thin film transistor N1, and a source electrode of the N1 is connected with a data line;the source electrode of the second thin film transistor N2 is connected with the data line; the third thin film transistor N3 is connected with the drain electrode of the N2; the grid electrode of the N1 and the grid electrode of the N2 are connected with a first scanning line, and the first scanning line controls the on-off states of the N1 and the N2; the grid electrode of the N3 is connected with a second scanning line, and the second scanning line controls the on-off state of the N3. Embodiments of the present invention, tFT device tubes N2 and N3 are added, and the TFT device is controlled to be turned on through a previous-level scanning line and a scanning line of the same level in a time sequence, so that when a fingerprint is contacted, the fingerprint grain position is positioned through leakage current generated when N2 is turned off and voltage and current fluctuation generated by a storage capacitor on a data line, and the normal display brightness is not influenced.
Description
technical field [0001] The present invention relates to the field of communication technologies, and in particular, to a fingerprint pixel circuit and an electronic device. Background technique [0002] Under-screen fingerprint recognition technology is to place the recognition module under the screen panel of the electronic device. During fingerprint recognition, the light emitted by the screen passes through the screen panel to form a light film on the fingerprint of the finger. After the light enters the fingerprint valley, the finger touches it. The interface between the screen and the air is totally reflected, and the reflected light from the fingerprint penetrates the screen and returns to the CCD (Charge Couple Device) of the recognition sensor; while the light directed to the fingerprint ridge does not undergo total reflection, and is absorbed or absorbed by the ridge and the screen in contact with it. Diffuse reflection to other places, so that the image of the fing...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G02F1/1333
CPCG02F1/13338G06V40/1324G06V40/1318
Inventor 陈彩琴
Owner VIVO MOBILE COMM CO LTD