Ultrasonic induction circuit, driving method thereof and display device
A technology of sensing circuit and driving method, applied in the direction of electrical digital data processing, fluid using vibration, instruments, etc., can solve problems affecting touch performance, fingerprint ridge and valley judgment errors, etc.
Active Publication Date: 2021-01-05
BOE TECH GRP CO LTD
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Problems solved by technology
[0004] In order to solve the above-mentioned technical problems, an embodiment of the present invention provides an ultrasonic induction circuit and its driving method, as well as a display device, so as to solve the problem of the current display device integrated with a touch
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[0071] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.
[0072] The steps shown in the flowcharts of the figures may be performed in a computer system, such as a set of computer-executable instructions. Also, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.
[0073] figure 1 It is a schematic diagram of the structure and principle of an ultrasonic generator. like figure 1 As shown, the structure of the ultrasonic generator 20 may include: an upper electrode (Top Electrode, referred to as: TE) 21 and a lowe...
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The embodiment of the invention discloses an ultrasonic induction circuit, a driving method thereof and a display device. In the ultrasonic induction circuit, a first electrode of an ultrasonic sensoris electrically connected with the first end of the ultrasonic induction circuit, a second electrode of the ultrasonic sensor is electrically connected with the second end of a first potential supplysub-circuit, and the first end of the first potential supply sub-circuit is electrically connected to a first potential supply end; the grid electrode of the M1 is electrically connected with the second electrode and the second end of the compensation sub-circuit, the second electrode is electrically connected with the first end of the compensation sub-circuit, and the first electrode is coupledto a second potential supply end; the first end of the signal output sub-circuit is electrically connected to the second electrode of the first transistor, and the second end of the signal output sub-circuit is electrically connected to the second end of the ultrasonic induction circuit. According to the embodiment of the invention, the problem that in the existing display equipment, the output value of the voltage signal for realizing the touch operation is influenced by the threshold voltage of the transistor in the sensing circuit, so that the touch performance is influenced is solved.
Description
technical field [0001] The present application relates to but is not limited to the fields of display technology and touch technology, especially an ultrasonic sensing circuit and its driving method, as well as a display device. Background technique [0002] With the development and wide application of display technology, integrating a device with a touch function in a display device has become a development direction of a new display device. [0003] Currently, touch devices integrated in display devices have, for example, fingerprint identification functions and touch operation functions, and generally use capacitive or resistive touch devices. The prior art has also developed a touch device that uses an ultrasonic sensor (Sensor) to realize fingerprint recognition and touch operation. The threshold voltage of the transistor on the output path (V th ); in addition, since the threshold voltage of the transistor on the above-mentioned output path is related to factors such...
Claims
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Login to View More IPC IPC(8): G06F3/041G06F3/043
CPCG06F3/0412G06F3/0416G06F3/043B06B1/0688B06B1/0238B06B2201/70G06V40/1306B06B1/0696G06F3/0433
Inventor 刘英明王海生丁小梁王雷王鹏鹏李昌峰李秀锋张晨阳王天奇
Owner BOE TECH GRP CO LTD