Infovision Optoelectronics (kunshan) Co., Ltd.

Dalei Zhang

Peiyang Lin

Yongxin Ruan

Te-Chen Chung

Zifang Su

Hsin-Chieh Lai

Weifeng Fan

Techen Chung

Qingbai Lv

Yuanyuan Mu

Xiaoning Gao

Jia He

Fei Jiang

A liquid crystal display device includes a display panel with a switchable viewing angle and a driving circuit for driving the display panel. The display panel can switch between wide and narrow viewing angles. The driving circuit includes a display control unit, a viewing angle control unit, a viewing angle control voltage generating circuit, and a gamma voltage generating circuit. The viewing angle control unit is connected to the display control unit, the viewing angle control voltage generating circuit and the gamma voltage generating circuit. The display control unit is used to control the display panel to realize picture display. The viewing angle control unit is used to control the display panel to switch between wide viewing angle display and narrow viewing angle display.

Liquid crystal display device

A liquid crystal display device includes a display panel, a display control module and a voltage output module. The display panel includes a first substrate, a second substrate, and a liquid crystal layer between the first substrate and the second substrate. The first substrate is provided with a viewing angle control electrode. In a wide viewing angle mode, the image refresh frequency of the display panel is the same as the data input frequency of the image data inputted to the display control module, and the voltage output module outputs a direct current voltage to the viewing angle control electrode. In a narrow viewing angle mode, the image refresh frequency of the display panel is twice or four times the data input frequency of the image data inputted to the display control module, and the voltage output module outputs a periodic alternating voltage to the viewing angle control electrode.

Liquid crystal display device with switchable viewing angle and viewing angle switching method

A power conversion circuit for switching the viewing angle of an LCD, includes an input terminal, an output terminal, a switching unit, an isolating unit, an output unit, a first power supply, a second power supply, and a third power supply. When the input terminal is provided with a low level voltage, the switching unit is switched on, the voltage of the second power supply is provided as a first DC voltage to the output terminal via the switching unit and the isolating unit. When the input terminal is provided with a high level voltage, the switching unit is switched off, the voltage of the third power supply is provided as a second DC voltage to the output terminal via the output unit and the isolating unit, wherein the second DC voltage is higher than the first DC voltage.

Power conversion circuit for switching viewing angle and liquid crystal display

An LCD device includes a color filter (CF) substrate, a thin film transistor (TFT) substrate and a liquid crystal layer. The CF substrate includes a first transparent substrate, a CF layer, a black matrix and a shielding layer. The TFT substrate includes a second transparent substrate, a pixel electrode, a common electrode, and an insulating layer disposed between the pixel electrode and the common electrode. A control signal in the form of an AC voltage is provided to the shielding layer of the CF substrate, and a DC common voltage is provided to the common electrode. An alternating electric field is generated between the AC voltage of the control signal of the shielding layer and the DC common voltage of the common electrode to push impurity ions existed in the liquid crystal layer to swing up and down in the liquid crystal layer.

Moving impurity ions in a liquid crystal display device

The present invention provides a source driving circuit and an LCD device. The source driving circuit includes output channels, and each output channel includes a first switch element, a second switch element, a first output end, and a second output end. The first switch element and the second switch element are respectively connected to the first output end and the second output end. When the first switch element is turned on, the output channel outputs a display signal, and when the second switch element is turned on, the output channel provides recycled charges which are generated when the display signal is changed from a positive voltage to a negative voltage. The source driving circuit can recycle charges to make the most of charges generated when the display signals change from positive voltages to negative voltages and reduce power consumption of the LCD device.

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Kunshan, China

Dalei Zhang