Himax Technologies, Inc.

Himax Display, Inc.

Chia-Cheng Lai

Yen-Chen Chen

Chien-Pin Chen

Ming-Cheng Chiu

Chin-Jung Chen

Yuet-Wing Li

Yung-Yuan Ho

Sheng-Ren Chiu

Yao-Hung Lai

Chia-Chun Kuo

Chih-Hung Yang

Chia-Chuan Lee

A light source control method of a projector is provided. The light source control method includes the following steps. A frame data of a frame period is received. Gray distributions of a plurality of colors in the frame data are obtained by analyzing the frame data. Whether to shut all or a portion of a plurality of color light sources of the projector is determined according to the gray distributions of the colors. Therefore, the power consumption of the projector can be reduced.

Light source control method of projector

A display and a real-time automatic white balance method thereof are provided. The display includes a first color light source and a second color light source. The real-time automatic white balance method includes following steps. A first target luminance of the first color light source and a second target luminance of the second color light source are provided. A luminance of the first color light source is detected to obtain a first current luminance. A second current luminance of the second color light source is calculated according to a ratio of the first target luminance to the first current luminance and the second target luminance. A luminance of the second color light source is adjusted according to the second current luminance.

Display and real-time automatic white balance method thereof

A projection apparatus including an illumination unit, a brightness detection circuit, a signal conversion circuit, and a control unit is provided. The illumination unit generates a light source according to a plurality of driving signals and provides a temperature sensing signal according to the temperature of the light source. The brightness detection circuit generates a plurality of brightness sensing signals. The signal conversion circuit converts the temperature sensing signal and the brightness sensing signals into temperature information and a plurality of brightness information. The control unit comprises a setting table for storing a predetermined temperature information and a plurality of predetermined brightness information, and the control unit adjusts the driving signals in order to identify the converted temperature information and the converted brightness information conform to the stored information in the setting table.

Projection apparatus

An electronic device with a projection functionality includes: a universal serial bus (USB) port, a processing circuit, a storage, a storage controller and a display circuit. The USB port receives USB packets carrying a first pixel data. The processing circuit is coupled to the USB port, and converts the received USB packets into the first pixel data. The storage controller is coupled between the processing circuit and the storage, and stores the first pixel data into the storage. The display circuit is coupled to the storage controller, and generates a display driving signal according to the first pixel data stored in the storage.

Electronic device having projection functionality

The present invention relates to a driving method for cholesteric liquid crystal display. A plurality of pixels of the display are controlled by a plurality of row drivers and a plurality of column drivers. According to the method of the invention, firstly, a DC input voltage or a non-symmetric AC input voltage is applied to the row drivers and the column drivers so that the voltage of the pixel is larger than a withstand voltage of the drivers. Then, an initial column signal and an initial row signal are respectively supplied by the corresponding column driver and row driver so as to initialize the corresponding pixel. The polarity of the initial column signal is different from that of the initial row signal. Because the initial row signal minus the initial column signal equals the signal of the pixel, the amplitude of the signal applied to the pixel can be increased. Therefore, according to the invention, the initial time of the pixel can be decreased, and the transferring speed of the pixel can be improved.

Driving method for cholesteric liquid crystal display

A single polar driving method for a cholesteric liquid crystal display. The method comprises the steps of selecting the pixels by applying a first signal switching between a ground and a first level to the common line of the selected pixels, driving the selected pixels into a reflecting state by applying a second signal out of phase with the first signal and that switches between a second and third levels to the segment lines thereof, driving the selected pixels into a transparent state by applying a third signal in phase with the first signal and that switches between the second and third levels to the segment lines thereof, and deselecting the pixels by applying a fourth signal fixed at a fourth level to the common lines thereof.

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Tainan County, Taiwan

Chia-Cheng Lai