US 12,094,410 B2
Driving voltage compensation circuit, driving circuit, pixel driving circuit and display device
Tao Fan, Mianyang (CN); and Baohong Kang, Mianyang (CN)
Assigned to MIANYANG HKC OPTOELECTRONICS TECHNOLOGY CO., LTD., Mianyang (CN); and HKC CORPORATION LIMITED, Shenzhen (CN)
Filed by MIANYANG HKC OPTOELECTRONICS TECHNOLOGY CO., LTD., Sichuan (CN); and HKC CORPORATION LIMITED, Shenzhen (CN)
Filed on Dec. 9, 2022, as Appl. No. 18/078,362.
Claims priority of application No. 202210105094.3 (CN), filed on Jan. 28, 2022.
Prior Publication US 2023/0245621 A1, Aug. 3, 2023
Int. Cl. G09G 3/3233 (2016.01)
CPC G09G 3/3233 (2013.01) [G09G 2300/043 (2013.01); G09G 2300/0819 (2013.01); G09G 2300/0842 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0233 (2013.01); G09G 2330/028 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A driving voltage compensation circuit, comprising: a compensation circuit and a first switching circuit,
wherein the first switching circuit is connected to a first pole of a driving element and a light emitting device, the compensation circuit is connected to a third pole of the driving element, a second pole of the driving element is connected to a power supply, the first switching circuit and the light emitting device are grounded;
the driving voltage compensation circuit operates in accordance with an operational timing comprising a plurality of cycles, each of the plurality of cycles comprises at least a first time period and a second time period; during the first time period of each of the plurality of cycles, the first switching circuit is turned on, and the compensation circuit is turned off; during the second time period of each of the plurality of cycles, the first switching circuit is turned off, and the compensation circuit is turned on; the first time period is a time period during which the light emitting device is driven to emit light, and the second time period is a time period during which a data voltage is received;
in the case where the compensation circuit is turned on, one end of an energy storage circuit of the compensation circuit receives the data voltage, the other end of the energy storage element of the compensation circuit is connected to the power supply through the driving element, the energy storage element has a voltage difference, and the compensation circuit is configured to store electrical energy for the energy storage element utilizing the received data voltage;
in the case where the compensation circuit is turned off, the energy storage element is configured to release the electrical energy to provide the driving voltage to the third pole of the driving element, the driving voltage is determined by a voltage value of the power supply, a value of a threshold voltage of the driving element, and a value of the data voltage;
wherein the energy storage element stores the electrical energy prior to the first time period of each cycle, and release the stored electrical energy to provide the driving voltage to the driving element in the first time period;
the compensation circuit is further configured to receive a first scan signal, the first switching circuit is configured to receive a second scan signal;
the first scan signal is configured to control the on/off of the compensation circuit, when the first scan signal controls the compensation circuit to turn on and the data voltage is input to the compensation circuit, the energy storage element is configured to store electrical energy; and
the second scan signal is configured to control the on/off of the first switching circuit.