Title:
VOLTAGE SENSING CIRCUIT, DISPLAY DRIVER, DISPLAY DEVICE, AND COMPARATOR
Document Type and Number:
WIPO Patent Application WO/2023/176670
Kind Code:
A1
Abstract:
In the present invention, first, a differential current pair corresponding to a difference between a reference voltage and a sensed voltage is generated. Next, the differential current pair is converted into a first current based on a first voltage and a second current based on a second voltage, and voltage, which is generated at a first output end by extracting the second current from the first output end while supplying the first current to the first output end, is outputted as a first signal. The differential current pair is further converted into a third current based on the first voltage and a fourth current based on the second voltage, and voltage, which is generated at a second output end by extracting the fourth current from the second output end while supplying the third current to the second output end, is outputted as a second signal. Then, whether the sensed voltage has changed from a reference state or not is determined on the basis of the first and second signals. Note that, in the reference state, the first current is set to be higher than the second current, and the third current is set to be lower than the fourth current.
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Inventors:
TSUCHI HIROSHI (JP)
Application Number:
PCT/JP2023/008992
Publication Date:
September 21, 2023
Filing Date:
March 09, 2023
Export Citation:
Assignee:
LAPIS TECH CO LTD (JP)
International Classes:
G09G3/20; G02F1/133; G09G3/3275; G09G3/36; H03F3/45; H03K5/08; H03K19/0185
Foreign References:
| JPH11163644A | 1999-06-18 | |||
| JP2010122509A | 2010-06-03 | |||
| JP2017153017A | 2017-08-31 |
Attorney, Agent or Firm:
LEXT, P.C. (JP)
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