Display driving circuit and brightness control method

Abstract

A display driving circuit and a brightness control method are applied to an OLED panel. The display driving circuit, coupled to an OLED panel, includes a brightness controller, a light-emitting scan line adjusting circuit and a light-emitting scan line generator. The brightness controller provides a brightness controlling signal. The light-emitting scan line adjusting circuit includes a first counting unit, a second counting unit and an arrangement unit. The first counting unit provides a frame counting value. The second counting unit provides a light-emitting period counting value. The arrangement unit is coupled to the brightness controller, the first counting unit and the second counting unit and used to generate an adjusting signal according to the brightness controlling signal, the frame counting value and the light-emitting period counting value. The light-emitting scan line generator is coupled to the light-emitting scan line adjusting circuit and the OLED panel and used to generate light-emitting scan lines to the OLED panel according to the adjusting signal.

Description

technical field [0001] The present invention relates to a display device, in particular to a display driving circuit and brightness control method applied to an Organic Light-Emitting Diode (OLED) panel. Background technique [0002] Such as figure 1 As shown, the organic light emitting diode panel PL may include (M*N) pixels P11-PMN, and its display driving circuit may include a data driver (Data driver) DD, a data writing scanline driver (Data writing scanline driver) WSL and The light-emitting scan line driver (Light-emitting scan line driver) LSL, and according to the timing control signal sent by the timing controller (Timing controller) TCON, respectively controls the data lines D1~DM of the organic light-emitting diode panel PL, and the data writing scan line W1 ~WN and the timing of the light-emitting scanning lines E1~EN. [0003] Such as figure 2 As shown, the light emitting scan line driver LSL includes a brightness controller 10 and a light emitting scan line...

AI Technical Summary

Problems solved by technology

[0006] However, according to the above, it can be seen that since the width of the traditional light-emitting period LEP must be a multiple of A lines and the B light-emitting periods included in each display frame period FP must be fixed, resulting in fine-tuning the ratio of the light-emitting area to the overall display area. The fineness will be limited, as shown in Table 1 [Table 1 takes the fineness of 10 bits (1024 steps) as an example, and a display frame period contains 1920 lines], which needs to be improved urgently

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