Amoled drive circuit and display device
A driving circuit and pixel circuit technology, applied in static indicators, instruments, etc., can solve the problems of different reference voltage Vref, sudden changes in brightness, and affecting AMOLED display effects, and achieve the effect of improving the display effect
Active Publication Date: 2021-03-05
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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Problems solved by technology
[0004] The inventor of the present invention found in the long-term research process that the switch N1 in the detection circuit 12 is an N-way multiplexing module Mux, that is, the detection circuit 12 can control N sensing lines 16 at the same time, that is, the detection circuit 12 can control the same line simultaneously. N pixels; during normal display, due to the internal impedance of the detection circuit 12, the reference voltage Vref of each S point entering the N pixels will be different, and then the N pixels controlled by the same detection circuit 12 will be different. There will be sudden changes in brightness, which will affect the display effect of AMOLED
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[0014] see figure 2 , figure 2 It is a structural schematic diagram of an embodiment of an AMOLED driving circuit in the present invention; the driving circuit includes a pixel circuit 20, a data driving circuit 22 and a detection circuit 24; specifically, the pixel circuit 20 includes a data line 200, a first switching element 202 and an organic electro-conductor The light emitting unit 204, the first switching element 202 is a driving switching element, used to drive the organic electroluminescent unit 204 to emit light, the data line 200 is coupled to the first switching element 202; the data driving circuit 22, coupled to the data line 200, is used to The data voltage signal Vdate is provided to the pixel circuit 20 through the data line 200; the detection circuit 24 is coupled to the data line 200, and is used to receive and output the current flowing through the first switching element 202 fed back by the data line 200, and the current is used for subsequent adjustment...
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The invention discloses an AMOLED drive circuit and a display device. The drive circuit includes: a pixel circuit, a data drive circuit and a detection circuit; wherein the pixel circuit includes a data line and a first switch element, and the data line is coupled to the first switch element; The driving circuit is coupled to the data line, and is used to provide a data voltage signal to the pixel circuit through the data line; the detection circuit is coupled to the data line, and is used to receive and output the current flowing through the first switching element fed back by the data line, and the current is used to control the first switching element. A switching element threshold voltage is compensated. Through the above manner, the implementation manner provided by the present invention can improve the display effect of AMOLED.
Description
technical field [0001] The invention relates to the field of display technology, in particular to an AMOLED driving circuit and a display device. Background technique [0002] The organic light emitting diode (OLED) display device has the advantages of self-luminescence, low driving voltage, high luminous efficiency, short response time, etc., and is recognized by the industry as the display device with the most development potential. [0003] OLED display devices can be classified into two categories, passive matrix OLED (Passive Matrix OLED, PMOLED) and active matrix OLED (Active Matrix OLED, AMOLED) according to the driving method. Among them, AMOLED has pixels arranged in an array, belongs to the active display type, and has high luminous efficiency. Since the thin film transistors driving organic light emitting diodes have threshold voltage deviations, AMOLED display devices usually need to be equipped with a detection system for detection. like figure 1 as shown, f...
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IPC IPC(8): G09G3/3225
CPCG09G3/3225
Inventor 王振岭黄泰钧
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD