Adjusting method of display parameter and liquid crystal display system

An adjusting method of flicker value of a liquid crystal display panel, comprising:

• making an adjustment voltage ΔVx of a grayscale x of a liquid crystal display panel to change in a preset second voltage range and obtaining flicker values F(ΔVx) of the liquid crystal grayscale x in a process of making the adjustment voltage ΔVx of the grayscale x of the liquid crystal display panel to change in the preset second voltage range, wherein the x is any grayscale in a range from a minimum grayscale to a maximum grayscale, the adjustment voltage ΔVx of the grayscale x is a voltage amount of a positive voltage and a negative voltage corresponding to the grayscale x both being changed;
• obtaining flicker values F(ΔV′x) less than a preset flicker value from the flicker values F(ΔVx) of the grayscale x, and obtaining an optimal adjustment voltage of the grayscale x based on adjustment voltages ΔV′x corresponding to flicker values F(ΔV′x) of the grayscale x;
• adjusting the positive voltage and the negative voltage corresponding to the grayscale x as per the optimal adjustment voltage of the grayscale x, to thereby achieve flicker value adjustment of the liquid crystal display panel;
• wherein a grayscale voltage of the grayscale x is constituted by the positive voltage and the negative voltage, the positive voltage and the negative voltage both are adjusted with the same voltage amount equal to the optimal adjustment voltage such that the grayscale voltage of the grayscale x being the voltage difference between the positive voltage and the negative voltage is not changed;
• wherein the step of obtaining flicker values F(ΔV′x) less than a preset flicker value from the flicker values F(ΔVx) of the grayscale x, and obtaining an optimal adjustment voltage of the grayscale x based on adjustment voltages ΔV′x corresponding to the flicker values F(ΔV′x) of the grayscale x comprises:
• calculating an average value of adjustment voltages ΔV′x corresponding to the flicker values F(ΔV′x) less than the preset flicker value as the optimal adjustment voltage, wherein the preset flicker value is greater than a minimum value of the flicker values F(ΔVx) of the liquid crystal display panel and less than a half of a maximum value of the flicker values F(ΔVx) of the liquid crystal display panel.

A liquid crystal display system comprising a liquid crystal panel, an optical sensor, a storage medium and one or more than one processors;

• the optical sensor being configured for acquiring luminance information of the liquid crystal display panel, wherein the luminance information of the liquid crystal display panel comprises a luminance value and a flicker value of the liquid crystal display panel;
• wherein the storage medium being stored with a software production executable by the one or more than one processors to:
• acquire a first luminance value from the optical sensor when the liquid crystal display panel is displaying an image of a minimum grayscale and a second luminance value from the optical sensor when the liquid crystal display panel is displaying an image of a maximum grayscale;
• based on the first luminance value, the second luminance value and a standard Gamma curve of the liquid crystal display panel, obtain a target luminance value of each grayscale conforming to the standard Gamma curve;
• based on the target luminance value of each grayscale and a predetermined relationship between grayscale voltage and luminance of the liquid crystal display panel, obtain an target grayscale voltage of each grayscale;
• adjust a grayscale voltage of each grayscale of the liquid crystal display panel to be the target grayscale voltage of the grayscale, to thereby achieve Gamma adjustment of the liquid crystal display panel;
• make an adjustment voltage ΔVx of a grayscale x of the liquid crystal display panel to change in a preset second voltage range, obtain flicker values F(ΔVx) of the grayscale x in a change process of the adjustment voltage ΔVx of the grayscale x in the preset second voltage range, the x is any grayscale in a range from the minimum grayscale to the maximum grayscale, the adjustment voltage ΔVx of the grayscale x is a voltage amount of a positive voltage and a negative voltage corresponding to the grayscale x both being changed;
• obtain flicker values F(ΔV′x) less than a preset flicker value from the flicker values F(ΔV′x) of the grayscale x and get an optimal adjustment voltage of the grayscale x based on adjustment voltages ΔV′x corresponding to the flicker values F(ΔV′x) of the grayscale x;
• adjust the positive voltage and the negative voltage corresponding to the grayscale x as per the optimal adjustment voltage of the grayscale x, to thereby achieve flicker value adjustment of the liquid crystal display panel;
• wherein a grayscale voltage of the grayscale x is constituted by the positive voltage and the negative voltage, the positive voltage and the negative voltage both are adjusted with the same voltage amount equal to the optimal adjustment voltage such that the grayscale voltage of the grayscale x being the voltage difference between the positive voltage and the negative voltage is not change;
• make the liquid crystal display panel to display an image of a preset grayscale, the preset grayscale being no less than two thirds of the maximum grayscale;
• make a common voltage Vcom of the liquid crystal display panel to change in a preset first voltage range and obtain a minimum flicker value of the liquid crystal display panel in a change process of the Vcom of the liquid crystal display panel, wherein the preset first voltage range is from an allowable maximum common voltage of the liquid crystal display panel to an allowable minimum common voltage of the liquid crystal display panel;
• take a Vcom of the liquid crystal display panel corresponding to the minimum flicker value as an optimal Vcom and further adjust the Vcom of the liquid crystal display panel to be the optimal Vcom.