Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of sensor pixels and substrate substrates, which is applied in the fields of ultrasonic sensors, sensor pixels, OLED display panels and OLED display devices, and can solve the problems of complex manufacturing process and high cost of sensor pixels
Active Publication Date: 2019-08-06
BOE TECH GRP CO LTD
View PDF9 Cites 3 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0003] The inventor found that the sensor pixels used for ultrasonic fingerprint recognition in the related art use diodes to rectify the electrical signals generated by the received reflected ultrasonic waves. type, resulting in complex manufacturing process of sensor pixels and high cost
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 more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0058] An embodiment of the present invention provides a sensor pixel, figure 1 A schematic structural diagram of a sensor pixel provided by an embodiment of the present invention, figure 2 A schematic structural diagram of a sensor pixel circuit provided for an embodiment of the present invention, such as figure 1 and 2 As shown, the sensor pixel provided by the embodiment of the present invention includes: a base substrate (not shown in the figure), a sensor pixel circuit 10 and a piezoelectric transducer 20 arranged on the substrate substrate, and the piezoelectric transducer 20 Connected to the first signal input terminal INPUT1 and the first node N1 respectively, the sensor pixel circuit 10 includes: a node control subcircuit, a driving subcircuit and a reading subcircuit.
[0059] Specifically, the node control subcircuit is respectively connected to the first node N1, the reset signal terminal RESET and the second signal input terminal INPUT2, and is used to control ...
Embodiment 2
[0129] Based on the inventive concepts of the above embodiments, an embodiment of the present invention further provides an ultrasonic sensor, including: a plurality of sensor pixels.
[0130] Wherein, the sensor pixel is the sensor pixel provided in Embodiment 1, and its implementation principle and implementation effect are similar, and will not be repeated here.
Embodiment 3
[0132] Based on the inventive concepts of the above embodiments, the embodiments of the present invention further provide an OLED display panel. The OLED display panel provided in the embodiments of the present invention includes: an OLED device layer and an ultrasonic sensor disposed on a base substrate.
[0133] Optionally, in the embodiment of the present invention, the ultrasonic sensor and the OLED device layer can be located on the same side of the base substrate, or on a different side, so that not only the display of the OLED display panel can be realized, but also fingerprint identification can be realized.
[0134] Specifically, as an implementation manner, the ultrasonic sensor is arranged on a side of the base substrate close to the OLED device layer; the sensor pixels are also used to drive the OLED device layer to emit light. In this implementation manner, the ultrasonic sensor is integrated into the OLED display panel, and the integration degree is relatively hig...
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 sensor pixel, an ultrasonic sensor, an OLED display panel and an OLEDdisplay device. The sensor pixel comprises a substrate, and a piezoelectric transducer and a sensor pixel circuit which are arranged on the substrate,; the piezoelectric transducer is respectively connected with a first signal input end and a first node; the sensor pixel circuit comprising: a signal node control sub-circuit which is used for controlling a first node, according to signals of a resetting signal end and a second signal input end; a driving sub-circuit which is used for providing a detection signal for a second node under the control of a signal of the first node; and the reading sub-circuit which is used for providing a signal of the second node for a signal reading line under thecontrol of a signal reading end. The technical scheme provided by the embodiment of the invention not only simplifies the manufacturing process of the sensor pixel, but also reduces the cost of the sensor pixel.
Description
technical field [0001] The invention relates to the field of display technology, in particular to a sensor pixel, an ultrasonic sensor, an OLED display panel and an OLED display device. Background technique [0002] Fingerprints are innate, unique and distinguishable features of the human body. It is composed of a series of valleys and ridges on the skin, and the fingerprint recognition technology developed from it was earlier used as a personal authentication technology. With the development of display technology, fingerprint recognition technology has become an important direction. At present, common implementation methods are capacitive sensing, optical detection, pressure sensing or ultrasonic detection. Ultrasonic detection method has received more and more attention because of its advantages of no contact, no occlusion, and high precision. [0003] The inventor found that the sensor pixels used for ultrasonic fingerprint recognition in the related art use diodes to r...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More