Display device and compensation device and method including light emitting diode pixels
A light-emitting diode and display device technology, applied to static indicators, instruments, etc., can solve problems such as inconsistent driving current, decline in panel display effect, and deviation of process parameters
Active Publication Date: 2020-04-07
CHENGDU JINGSHA TECH
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Problems solved by technology
In the semiconductor manufacturing process, there may be deviations in the process parameters of each transistor, resulting in inconsistencies in the driving current formed by the driving transistor under the same display data voltage, and the display effect of the panel decreases accordingly.
In the existing inventions, there are many pixel circuit structures that compensate for threshold voltage fluctuations, but cannot compensate for the influence of mobility, unit capacitance and other process parameters on the drive transistor current.
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[0082] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. In the case of no conflict, the embodiments and the features in the embodiments of the present invention can be combined arbitrarily with each other. Also, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.
[0083] fig...
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The invention discloses a display device comprising a light emitting diode pixel, a compensating device, and a compensating method. The light emitting diode pixel comprises a light emitting diode, a drive transistor, a first switch unit and a second switch unit; the display device comprises a current extracting unit, a voltage acquiring unit and a calculating output unit; the current extracting unit is used for extracting the current of the drive transistor in the first stage and acquiring the current value of the extracted current; the voltage acquiring unit is used for acquiring the voltage value, corresponding to the current value, of a grid electrode of the drive transistor; and the calculating output unit is used for calculating to obtain a solution of an unknown number in an equation set according to the acquired current value, the voltage value and the simultaneous equation set of a current formula of a saturated zone, calculating to obtain the data voltage value according to the solution of the equation set, the current value required for reserving and displaying the gray scale by the light emitting diode, and the current formula of the saturated zone, and outputting the data voltage corresponding to the data voltage value to the grid electrode of the drive transistor in the second stage, wherein the data voltage controls the drive transistor to drive the light emitting diode to emit light according to the reserved and displayed gray scale in the third stage. According to the display device, the light emitting current of the drive transistor is consistent.
Description
technical field [0001] The present invention relates to the technical field of light-emitting diode pixel display, and in particular to a display device including light-emitting diode pixels, a compensation device and a method. Background technique [0002] Light-emitting diode (organic, inorganic) display panels have attracted considerable attention due to their characteristics of low power consumption, full viewing angle, high color gamut, high contrast, and adaptability to flexible displays. Traditional active matrix light emitting diode (OLED or LED) pixel drive circuit such as figure 1 shown. In the semiconductor manufacturing process, there may be deviations in the process parameters of each transistor, resulting in inconsistent driving currents formed by the driving transistors under the same display data voltage, and the display effect of the panel will decrease accordingly. In the existing inventions, there are many pixel circuit structures that compensate thresho...
Claims
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IPC IPC(8): G09G3/3233G09G3/3291
CPCG09G3/3233G09G3/3291
Inventor 吴素华侯珊珊黎守新
Owner CHENGDU JINGSHA TECH