Title:
DRIVING CIRCUIT FOR FLAT PANEL DETECTOR AND TIMING DRIVING METHOD
Document Type and Number:
WIPO Patent Application WO/2021/147200
Kind Code:
A1
Abstract:
A driving circuit for a flat panel detector and a timing driving method therefor. The driving circuit for the flat panel detector comprises an amplifier circuit (100) and a first TFT switch (10) that outputs a signal to a data line; the amplifier circuit (100) comprises a second TFT switch (20) connected to a reversed bias voltage, a photodiode (30), a third TFT switch (40), and a fourth TFT switch (50) connected to a working voltage; a control terminal of the second TFT switch (20) is connected to a supply voltage, a first connecting terminal of the second TFT switch (20) is connected to the reversed bias voltage, and a second connecting terminal of the second TFT switch (20) is connected to a negative electrode of the photodiode (30). The second TFT switch (20) is provided between the reversed bias voltage and the photodiode (30), so that when the photodiode (30) performs conversion, the photodiode (30) is enabled by the second TFT switch (20) to convert an optical signal into an electrical signal, and after the photodiode (30) completes the conversion, the second TFT switch (20) is turned off, thereby avoiding leakage of charge to the maximum extent.
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Inventors:
CHEN GANG (CN)
Application Number:
PCT/CN2020/087692
Publication Date:
July 29, 2021
Filing Date:
April 29, 2020
Export Citation:
Assignee:
NANJING DETECH FUTURE TECH CO LTD (CN)
International Classes:
H04N5/32; H01L27/146; H04N5/14
Foreign References:
| CN110933335A | 2020-03-27 | |||
| CN101944550A | 2011-01-12 | |||
| CN102200474A | 2011-09-28 | |||
| CN104821146A | 2015-08-05 | |||
| CN109870470A | 2019-06-11 | |||
| CN105789202A | 2016-07-20 | |||
| CN104318883A | 2015-01-28 | |||
| US20050030273A1 | 2005-02-10 |
Attorney, Agent or Firm:
NANJING ZHONGLV INTELLECTUAL PROPERTY AGENCY FRIM (GENERAL PARTNERSHIP) (CN)
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