Threshold voltage detection method and device for driving transistor and display device
A technology for driving transistors and threshold voltages, applied in static indicators, instruments, etc., can solve problems such as data overflow and poor compensation effect, achieve effective threshold voltage compensation, improve accuracy, and reduce threshold voltage.
Active Publication Date: 2019-08-23
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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[0003] The embodiment of the present application provides a threshold voltage detection method and device of a driving transistor, and a display device to solve the problems of data overflow and poor compensation effect caused by a fixed ADC detection range (fixed driving data)
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[0034] Specific structural and functional details disclosed herein are representative only and are for purposes of describing example embodiments of the present application. This application may, however, be embodied in many alternative forms and should not be construed as limited to only the embodiments set forth herein.
[0035] In the description of this application, it should be understood that the terms "central", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, rather than indicating or implying the referred device Or elements must have a certain orientation, be constructed and operate in a certain orientation, and thus should not be construed as limiting the application. In addition...
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The invention discloses a threshold voltage detection method and device for a driving transistor and a display device. The method comprises: obtaining initial threshold voltage sets of a driving transistor assembly driven by different driving data in sequence; screening the initial threshold voltage in the initial threshold voltage set according to the corresponding driving data every time the initial threshold voltage set is obtained; combining all the screened initial threshold voltage sets to obtain M initial threshold voltages; detecting the driving transistors in the same display device or the same area in the same display device for multiple times to obtain an initial threshold voltage set; in two adjacent drives, the next driving data being greater than the previous driving data, the detection range of the threshold voltage being increased equivalently, outputting the initial threshold voltage set obtained each time as the final detection result after being screened and combined, and therefore the detection accuracy is improved, the threshold voltage exceeding the detection range is reduced, and then threshold voltage compensation can be effectively carried out.
Description
technical field [0001] The present application relates to the technical field of display panels, in particular to a threshold voltage detection method and device for driving transistors, and a display device. Background technique [0002] With the development of display technology, at present, for the same display device, a unified ADC detection range is set in the externally compensated Vth / K detection (that is, the VREF voltage of the ADC is fixed before detection). However, due to the DTFT's own defects or the influence of other external factors, the range of the entire panel Vth will exceed the sampling range set by the ADC (the voltage at the sampling point is too high or too low to be out of range), and the voltage out of range at this time is If the data overflows, the ADC will output the wrong sampling voltage value, which will affect the compensation effect and cause the display screen to be uneven. Contents of the invention [0003] Embodiments of the present ap...
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IPC IPC(8): G09G3/00G09G3/3208
CPCG09G3/006G09G3/3208G09G2320/0233
Inventor 杨波梁鹏飞
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD