Shenzhen Tcl New Technology Co., Ltd.

Shenzhen Tcl Digital Technology Ltd.

Dong Wen

Yong Yang

Peng He

Jianqiang Li

Chunhua Yu

Dexiang Zuo

Jianshe Qin

Haiying Zhang

A power source switch circuit include a switch, a switch control circuit configured to control the switch to be turned on/off, and a negative feedback circuit configured to feedback an output voltage of the switch. An input end of switch is connected to the switch control circuit, an output end of the switch is connected to a load circuit and the negative feedback circuit, and a control end of the switch is connected to the switch control circuit and the negative feedback circuit. The switch control circuit includes a bipolar transistor having a base, a collector and an emitter, a first resistor connected between the base and a control signal, a second resistor connected between the collector and the input end of the switch, and a third resistor connected between the collector and the control end of the switch.

Power source switch circuit

The present invention discloses a method for acquiring a histogram, wherein the method for acquiring a histogram includes the following steps: acquiring luminance data of pixel points of a dynamic video image; and performing separate statistical processing on frequencies of first luminance data with the minimum luminance value and second luminance data with the maximum luminance value in the luminance data, to draw a first histogram corresponding to the luminance data after the statistical processing. The present invention further discloses a method for dynamically adjusting luminance and an image processing apparatus. The present invention can embody features of image quality more accurately and more comprehensively.

Method for acquiring histogram, method for dynamically adjusting luminance and image processing apparatus

An adjustment method for LED backlight brightness, comprising the following steps of: if the current LED backlight brightness is greater than a preset value, maintaining the PWM duty ratio as the maximum value, and adjusting the LED backlight brightness by adjusting an LED conduction current (S); and if the current LED backlight brightness is not greater than the pre-set value, maintaining the LED conduction current to be constant, and adjusting the LED backlight brightness by adjusting the change of the PWM duty ratio between the maximum value and the minimum value (S). This method can improve the light-emitting efficiency of LEDs, reduce backlight loss, and reduce the noise generated by an LED drive circuit.

Adjustment method for LED backlight brightness

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Guangdong, China

Dong Wen