Iris Optronics Co., Ltd.

Chung-Yi Chang

Chi-Chang Liao

Chih-Wei Chen

Wu-Chang Yang

A self-powered cholesteric liquid crystal display (ChLCD) device and a method for tracking maximum power are disclosed. The ChLCD device includes a solar cell module, electrical energy for charging, an energy storage device, a charging unit, and a ChLCD module. The method of tracking the maximum power is: supply electrical energy for charging to the charging unit, sense the ambient temperature, and capture the sensed ambient temperature, correspond its value to the voltage value in the comparison data, and adjust the reference driving voltage with a resistor divider, and then electrically charging to the charging unit by the reference driving voltage, so that the charging unit can capture the maximum power of the electrical energy from the solar cell module, and then store the electrical energy in the energy storage device, to refresh the display screen of the ChLCD module and the ChLCD device can effectively utilize electricity.

Self-powered cholesteric liquid crystal display device and maximum power tracking method

A self-powered display device includes a display module and a power module. The display module is a cholesteric liquid crystal display module, and the power module is a solar cell module. The display module allows light to enter the power module from the front side, and the power module generates electricity upon receiving the light to provide the necessary energy for the display module to show images. The power module has multiple active areas and multiple inactive areas between the active areas. When the width of the inactive area is less than or equal to 50 μm, the human eye will have difficulty discerning the width of the inactive area. Additionally, a shielding layer can be placed on the inactive area to ensure that the visual color difference (ΔE) between the inactive area and the active area does not exceed 10 color difference units, thereby improving the image quality.

Self-powered display device

The present invention relates to a cholesteric liquid crystal display device, and a control method. The cholesteric liquid crystal display device includes a cholesteric liquid crystal display module, a solar battery unit, and a control unit. The control unit further includes an ambient energy management module and an energy storage module. The solar battery unit provides electrical energy to the management module. And the ambient energy management module stores electrical energy in the energy storage module. When it is necessary to refresh the images of the cholesteric liquid crystal display module, and the potential difference of the energy storage module reaches the charging cut-off voltage. The energy storage module can discharge the stored electrical energy to provide the electrical energy required by the cholesteric liquid crystal display module to refresh the image.

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Tainan, Taiwan

Chung-Yi Chang