Organic light emitting diode display and driving method thereof
A technology of light-emitting diodes and displays, which is applied to static indicators, instruments, semiconductor devices, etc., can solve the problems of different driving currents, different pixel brightnesses, and different aging degrees, and achieve the effect of ensuring uniformity
Active Publication Date: 2019-01-04
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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Problems solved by technology
However, due to factors such as the manufacturing process and the temperature and humidity of the use environment, the driving thin film transistors will all age, and the aging degree is not the same.
Therefore, when different pixels input the same data signal, the driving current output to the OLED will also be different, resulting in different brightness of the pixels in the OLED display.
This phenomenon will cause the organic light-emitting diode display to display a bad grayscale image, which seriously affects the image uniformity of the organic light-emitting diode display (Image Uniformity)
Method used
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[0023] The following describes in detail through specific embodiments with reference to the accompanying drawings.
[0024] figure 1 It is a schematic plan view of the organic light emitting diode display 1 in a preferred embodiment of the present invention. The OLED display 1 includes a display panel 10 and a driving circuit 20 , wherein the driving circuit 20 is used to drive the display panel 10 to display images. It can be understood that the driving circuit 20 is disposed in the non-display area of the display panel 10 .
[0025] Specifically, a plurality of parallel and insulated scan lines G1-Gn, a plurality of parallel and insulated data lines D1-Dm, and a plurality of readout lines R1-Rm are arranged in the display area (not shown) of the display panel 10, The plurality of scanning lines G1~Gn and the plurality of data lines D1~Dm are perpendicular to each other and insulated from each other, thereby defining a plurality of pixel units arranged in a matrix at the ...
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The invention provides an organic light emitting diode display and a driving method thereof. The organic light emitting diode display comprises a plurality of pixel units, each pixel unit comprises a first scanning line and a second scanning line used for providing scanning signals; a data line for providing data signals used for controlling the luminescence brightness of an organic light emitting diode; a switch transistor electrically connected with the second scanning line and the data line and used for transmitting the data signals; a storage capacitor electrically connected with the switch transistor and used for storing the data signals; a driving transistor used for providing driving current to drive the organic light-emitting diode to emit light; and a detecting circuit used for detecting the driving characteristics of the driving transistor under the control of the scanning signals provided by the first scanning line, outputting parameters representing the driving characteristics to compensate the data signals, and loading the compensated data signals to the pixel unit.
Description
technical field [0001] The invention relates to an organic light emitting diode display, in particular to an active matrix organic light emitting diode display and a driving method thereof. Background technique [0002] Organic Light Emitting Diode (OLED) displays can be classified into Passive Matrix OLED (PMOLED) displays and Active Matrix OLED (AMOLED) displays according to their driving methods. [0003] AMOLED displays are more widely used than PMOLED displays because they have higher brightness and better lifespan performance, and can also meet the requirements of high resolution. The AMOLED display uses a switching transistor and a driving transistor with a capacitor to store data signals. The driving transistor supplies current to the organic light-emitting diode to emit light, and the data signal stored in the capacitor controls the gray scale of the brightness of the organic light-emitting diode. Wherein, the switching transistor and the driving transistor are usu...
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IPC IPC(8): G09G3/3208H01L27/32
Inventor 赖宠文李昇翰
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD