Patent ID: 11955068
Assignee: BOE TECHNOLOGY GROUP CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A gamma standard voltage generating circuit, comprising:
a constant voltage element configured to output a constant voltage;
a following voltage element electrically coupled to a driving voltage terminal and configured to output a following voltage changing with a driving voltage of the driving voltage terminal;
a selecting element electrically coupled to an output terminal of the constant voltage element and an output terminal of the following voltage element, and configured to output the following voltage or the constant voltage as an output voltage at an output terminal thereof, the output voltage is a gamma standard voltage for generating gamma driving voltages at gray levels by performing voltage divisions thereon;
a comparison element electrically coupled to the output terminal of the selecting element, and configured to control the selecting element to output the following voltage in response to that the output voltage meets a preset standard, and control the selecting element to output the constant voltage in response to that the output voltage does not meet the preset standard;
wherein the preset standard is one of: i) the output voltage is lower than a threshold voltage, or, ii) the output voltage is higher than the threshold voltage; and the constant voltage is one of i) higher than or equal to the threshold voltage; or ii) lower than or equal to the threshold voltage, respectively.