Novatek Microelectronics Corp.

Chia-Hsin Tung

Chun-Hung Chen

Wing-Kai Tang

Hung-Yi Lin

Tzung-Yuan Lee

Chung-Jian Li

Hsin-Hung Ou

Shang-I Liu

Chieh-Hsiang Chang

Hao-Jan Huang

Liang-Kuei Hsu

Chien-Chuan Huang

Wei-Yi Wei

Wen-Kai Hsieh

Shu-Yuan Hsu

Hao-Jan Yang

Yung-Chien Fan

A method of dynamic bias control of a source driver bases on data wing level for power-saving. In order to cover the operating conditions of various loads under normal operations, the output buffer circuit operation is biased. The method utilizes the display gray scale difference between a previous data line and an immediately subsequent data line to determine the bias current to be used for the output buffer. When the difference between the current data line display gray scale and the previous data line display gray scale is not large, the bias current of the output buffer can be reduced. When the difference between the current data line display gray scale and the previous data line display gray scale is large, the bias current of the output buffer is increased and the current of the output buffer is adjusted according to different load conditions to save power.

Dynamic bias control of source driver based on data swing level for power saving

A display driver device including a driver circuit and a control circuit is provided. The driver circuit is configured to drive a display panel to display an animated image for a display period under an always on display mode according to display information of the animated image stored in a storage circuit. The display period includes a writing period and a non-writing period after the writing period. The control circuit is configured to write the display information of the animated image received from an external device into the storage circuit during the writing period of the display period. The control circuit is configured to stop receiving the display information from the external device and writing any display information into the storage circuit during the non-writing period of the display period. A display device including the display driver device and an operating method for the display driver device are also provided.

Display driver device and operating method for display driver device and a display device

A driving device and an operation method thereof are provided. The driver device includes a source driver circuit, an output switching circuit, and an equalization control circuit. Two input ends of the output switching circuit are coupled to two output ends of the source driver circuit. Two output ends of the output switching circuit are coupled to two data lines of an LED display panel. The equalization control circuit checks whether sub-pixel data of the two data lines meets a predetermined condition. A plurality of sub-pixels located on a current display line of the LED display panel are reset in a reset period. In a data scanning period after the reset period, the equalization control circuit determines whether to control the output switching circuit to perform an equalization operation on the two data lines according to the checking result.

LED display panel having a driver device for equalizing data lines and operation method thereof

A method of controlling a source driver includes the steps of: detecting a line of image data to be outputted by a plurality of channels of the source driver, to generate a detection result; generating a plurality of control signals according to the detection result, each of the plurality of control signals corresponding to a channel among the plurality of channels; and enabling or disabling an operational amplifier in each of the plurality of channels via one of the plurality of control signals corresponding to the channel.

Method of controlling source driver and related display system

A method of processing an image data for an image processing device includes a plurality of steps. The steps include receiving the image data; storing the image data in a frame buffer of the image processing device; performing a signal processing procedure on the image data obtained from the frame buffer, to generate a final display data; restoring the final display data in the frame buffer; and entering a power saving mode after the final display data is restored in the frame buffer. In the power saving mode, the image processing device performs the following steps: turning off the signal processing circuit; and outputting the final display data restored in the frame buffer, to display the final display data.

Method of processing image data and related image processing device

A display driving circuit, a calibration module, and an associated calibration method are provided. The display driving circuit includes an internal clock circuit and the calibration module. The internal clock circuit generates an internal clock signal. The calibration module includes a counting circuit and a trimming circuit. The counting circuit counts pulses of a reference clock signal to generate a detected reference-clock count and counts pulses of the internal clock signal to generate a detected internal-clock count. The trimming circuit generates a calibration signal to adjust frequency of the internal clock signal when a predefined condition is satisfied. The predefined condition is related to comparison between a first preset count and one of the detected reference-clock count and the detected internal-clock count.

Display driving circuit, calibration module, and associated calibration method

A backlight control apparatus for controlling luminance of a backlight panel includes an image information memory and a detection and automatic switching circuit. The image information memory is for storing the image information. The detection and automatic switching circuit is for detecting the updated frequency of the updated image information and then sets a displaying mode for adjusting the luminance of the backlight panel according to the updated frequency.

Backlight control apparatus and control method thereof

A driving method for a display device provides a first input pixel data corresponding to a pixel, and generates a second input pixel data by multiplying the first input pixel data by a predetermined rate. Next, an output pixel data corresponding to the second input pixel data is obtained from a predetermined gamma curve. When receiving the first input pixel data, the output pixel data is used for driving a display panel, and the second input pixel data is used for driving a backlight module of the display panel.

Driving method and display device capable of enhancing image brightness and reducing image distortion

In a first display period of a display device, a first count value is recorded at the rising edge of the data enable signal for controlling the length of a horizontal line. Next, a second count value is recorded at the falling edge of the data enable signal for identifying the time when the data enable signal switches from a high level to a low level. When entering a porch period following the first display period, the counter is cleared when the count value reaches the first count value. In a second display period following the porch period, the counter is cleared at the rising edge of the data enable signal, and the first count value is used for controlling the length of the horizontal line.

Method and circuit for controlling timings of display devices using a single data enable signal

A pulse extension circuit for extending a pulse signal includes an input unit for receiving the pulse signal, an edge detection unit coupled to the input unit for generating a initiation signal, a pulse initiation unit coupled to the edge detection unit for outputting a control signal and adjusting a voltage level of the control signal, a pulse width control unit coupled to the pulse initiation unit for outputting a termination signal, a reset unit coupled to the edge detection unit, the pulse initiation unit and the pulse width control unit for outputting the first reset signal and the second reset signal to reset the pulse initiation unit and the pulse width control unit, and an output unit coupled to the input unit and the pulse initiation unit for extending a signal period of the pulse signal according to the pulse signal and the control signal.

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Hsinchu, Taiwan

Chia-Hsin Tung