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A oled-pwm driving method

A driving method and driving signal technology, applied in static indicators, instruments, etc., can solve the problems of dynamic false contour, deviation and inconsistency of the brightness integration of human eyes, etc., so as to improve the picture contrast, improve the display quality, and reduce the dynamic false contour. Effects of contouring and flickering issues

Active Publication Date: 2019-01-01
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Application Information

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Problems solved by technology

However, the integration of brightness by the human eye will be biased, which will cause the gray scale perceived by the human eye to be inconsistent with the actual gray scale, and dynamic false contours and flickering will easily appear.
[0007] Moreover, compared with LCD display, OLED has the advantages of high contrast, wide color range, wide viewing angle, no need for backlight, etc., but its service life is shorter

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  • A oled-pwm driving method
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  • A oled-pwm driving method

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Embodiment Construction

[0037] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0038] The traditional OLED-PWM drive system cuts out multiple gray scales based on the display time of each sub-frame. Taking 8 bits, 8 subframes, and outputting gray scales of 0-255 as an example, the weight ratios of the display time of the 8 subframes are 1:2:4:8:16:32:64:128, corresponding to bits 0, Bit 1, Bit 2, Bit 3, Bit 4, Bit 5, Bit 6, Bit 7. Such as Figure 2a As shown, de_sfn is a schematic di...

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Abstract

Disclosed is an OLED-PWM driving method, comprising: looking up the allocation of a bright sub-frame and a non-bright sub-frame of each gray scale value in a whole frame of image based on a displayed look-up table (LUT) (S120); and based on the allocation of the bright sub-frame and the non-bright sub-frame of each gray scale value in the whole frame of image, breaking up corresponding gray scale energy in accordance with a predetermined rule (S130), so that the gray scale energy can be uniformly distributed in the whole frame of image.

Description

technical field [0001] The invention belongs to the technical field of organic display control, and in particular relates to an OLED-PWM driving method. Background technique [0002] Such as figure 1 Shown is a 3T1C (3transistor 1 capacitance, 3 transistors T1, T2, T3, 1 capacitor Cst) pixel drive circuit of OLED (Organic Light Emitting Diode, organic light emitting diode), wherein, D is a data drive signal, G is the charging scan signal, DG is the discharge scan signal, Ovdd is the constant current drive signal, and Ovss is the output voltage of the active light-emitting diode. The circuit is digitally driven when V A Only two Gamma voltage levels are output at , namely Gamma_a (brightest) and Gamma_b (darkest). According to the transistor current voltage I-V equation: [0003] I ds,sat =k·(V GS -V th,T2 ) 2 =k·(V A -V S -V th,T2 ) 2 [0004] Among them, I ds,sat is the conduction current of the transistor, k is the intrinsic conduction factor, V GS is the tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3208
CPCG09G3/3208
Inventor 陈小龙周明忠吴智豪
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD