Piezoelectric sensor detecting circuit, array piezoelectric sensor circuit and control method
A piezoelectric sensor and detection circuit technology, applied in the direction of measuring only voltage, capacitance measurement, instruments, etc., can solve the problems of current leakage, wrong detection results, and increase the power consumption of the overall structure, to avoid errors, accurate detection results, Design simple effects
Pending Publication Date: 2018-08-17
BOE TECH GRP CO LTD
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Problems solved by technology
Since the piezoresistor is connected to the amplifier, the detection is in a normally open state, so the current will often leak, increasing the power consumption of the overall structure
In addition, the wiring on the array substrate is connected in series with the piezoresistive sensor, and the resistance of the wiring is related to the length of the wiring. Due to the voltage drop, the output voltage measured at the near and far ends will be different, which will cause false test result
Method used
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[0065] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.
[0066] figure 1 A schematic diagram of an existing passive piezoresistive sensor detection circuit is shown. like figure 1 As shown, the passive architecture 10 typically consists of connecting a piezoelectric sensor P R The selection transistor (SEL TFT) and the resistive voltage amplifier are composed. Suppose P R The resistor value is R X , then the output V OU for (R F / R X )×V B , but because the detection of the piezoresistive amplifier after it is connected to the amplifier is normally open, the current wil...
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The invention discloses a piezoelectric sensor detecting circuit, an array piezoelectric sensor and a timing control method. The detecting circuit is connected with a piezoelectric sensor and includesan energy storage circuit, a first end of the energy storage circuit being used to receive a second voltage; a charging control circuit connected with a second end of the energy storage circuit and configured to receive a third voltage and control a charging process of the energy storage circuit in response to a charging control voltage so as to charge the second end of the energy storage circuitto a predetermined potential; a discharging control circuit, electrically connected with the second end of the energy storage circuit and a second end of the piezoelectric sensor separately, and configured to control the on and off of the energy storage circuit and the piezoelectric sensor in response to a discharging control voltage, so that the energy storage circuit discharges to the piezoelectric sensor for a preset period of time; and a detection circuit, connected with the second end of the energy storage circuit, and configured to receive a fourth voltage and output a detection voltagein response to a detection control voltage.
Description
technical field [0001] The invention relates to the field of piezoelectric sensor detection, in particular to a piezoelectric sensor detection circuit, an array piezoelectric sensor and a timing control method. Background technique [0002] In the prior art, one way of detecting the piezoelectric array sensor is to use an active architecture, and the other is to use a passive architecture. Compared with the active architecture, the passive architecture saves more power. [0003] Passive architectures usually consist of a selection transistor connected to a piezoresistive sensor and a resistive voltage amplifier. Since the piezoresistor is connected to the amplifier, the detection is normally open, so the current will always leak, increasing the power consumption of the overall structure. In addition, the wiring on the array substrate is connected in series with the piezoresistive sensor, and the resistance of the wiring is related to the length of the wiring. Due to the vol...
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Login to View More IPC IPC(8): G01R35/02
CPCG01R35/02H03K17/9643G01R29/22G01R19/0084G01R19/0053G01L1/225G01R27/2605H03K17/9622
Inventor郑智仁丁小梁王鹏鹏曹学友郭玉珍
OwnerBOE TECH GRP CO LTD