公开(公告)号：US09772756B2

公开(公告)日：2017-09-26

申请号：US14727763

申请日：2015-06-01

Applicant: Novatek Microelectronics Corp.

Inventor： Kuei-Chung Chang ,  Wan-Yu Kuo ,  Tzu-Chu Yin ,  Chun-Ta Wu ,  I-Te Liu

IPC: G09G5/02 ,  G06F3/0484 ,  G09G3/20

CPC classification number: G06F3/04842 ,  G09G3/2003 ,  G09G2320/0276 ,  G09G2320/0606 ,  G09G2320/0666 ,  G09G2320/0673

Abstract: A display driver configured to drive a display panel to display an image is provided. The display driver includes an interpolation operation unit and a gamma circuit. The interpolation operation unit is configured to receive two gamma reference curves, and perform an interpolation operation on the two gamma reference curves to generate a plurality of gamma curves. The gamma circuit is configured to select one of the generated gamma curves based on a user selection signal, and drive the display panel to display the image based on the selected gamma curve, so as to adjust a color temperature of the image based on the user selection signal. Color temperatures of the generated gamma curves are distinct, and the generated gamma curves have the same gamma value. Furthermore, a method for adjusting a color temperature of an image is also provided.

公开(公告)号：USRE45707E1

公开(公告)日：2015-09-29

申请号：US14253900

申请日：2014-04-16

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Yu-Kuang Chang ,  Kuei-Chung Chang ,  Ming-Da Chiang

IPC: H04N5/202 ,  H04N9/69 ,  G09G5/06

CPC classification number: H04N9/69 ,  G09G5/06 ,  G09G2310/0289 ,  G09G2320/0673 ,  G09G2330/021 ,  G09G2330/028 ,  G09G2340/10

Abstract: A display driving circuit comprising a video signal transformation circuit, a reference voltage generating circuit, a DAC and an interpolation operational amplifier is provided. The video signal transformation circuit transforms an input video signal into a transformed video signal with a higher bit depth. The transformed video signal comprises an upper n bits data and a lower m bits data, wherein n+m equals a bit depth of the transformed video signal. The reference voltage generating circuit generates reference voltages. The DAC selects a first reference voltage and a second reference voltage to interpolation operational amplifier from the reference voltages according to an upper n bits data of the transformed video signal. The interpolation operational amplifier outputs a driving voltage to display device according to the first reference voltage, the second reference voltage and the lower m bits data of the transformed video signal.

Abstract translation: 提供了包括视频信号变换电路，参考电压产生电路，DAC和内插运算放大器的显示驱动电路。 视频信号变换电路将输入视频信号变换为具有较高位深度的变换视频信号。 经变换的视频信号包括高n位数据和较低m位数据，其中n + m等于变换视频信号的位深度。 参考电压产生电路产生参考电压。 DAC根据变换的视频信号的高n位数据从参考电压中选择第一参考电压和第二参考电压到插值运算放大器。 内插运算放大器根据变换后的视频信号的第一参考电压，第二参考电压和下位m位数据向显示装置输出驱动电压。

公开(公告)号：US08913049B2

公开(公告)日：2014-12-16

申请号：US13831971

申请日：2013-03-15

Applicant: Novatek Microelectronics Corp.

Inventor： Hsi-Chi Ho ,  Kuei-Chung Chang

IPC: G09G5/00 ,  H04N5/14 ,  G09G5/393

CPC classification number: G09G5/00 ,  G09G5/393 ,  G09G2320/106 ,  G09G2330/022 ,  G09G2360/10 ,  H04N5/14 ,  H04N5/144

Abstract: A motion detection method is adapted for an image display circuit including a motion detection circuit and an arbitration circuit. In this motion detection method, a number of motion quality observation windows are defined. Each motion quality observation window includes a start point and an ending point. In the motion quality observation windows, a write frame count value is adjusted according to a write frame command. At the end point of each motion quality observation window, if the write frame count value is equal to or bigger than a preset count value, an enable signal is outputted to the arbitration circuit to determine whether the image display circuit performs motion display. In the motion quality observation windows, the end point of the i-th motion quality observation window is located between the start point and the end point of the (i+1)-th motion quality observation window, where i is a positive integer.

Abstract translation: 运动检测方法适用于包括运动检测电路和仲裁电路的图像显示电路。 在该运动检测方法中，定义了多个运动质量观察窗口。 每个运动质量观察窗口包括起点和终点。 在运动质量观察窗口中，根据写入帧命令来调整写入帧计数值。 在每个运动质量观察窗口的终点处，如果写入帧计数值等于或大于预设计数值，则向仲裁电路输出使能信号，以确定图像显示电路是否执行运动显示。 在运动质量观察窗中，第i运动质量观察窗的终点位于第（i + 1）运动质量观察窗的起始点和终点之间，其中i是正整数。

公开(公告)号：US20140132574A1

公开(公告)日：2014-05-15

申请号：US13831971

申请日：2013-03-15

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Hsi-Chi Ho ,  Kuei-Chung Chang

IPC: G09G5/00

CPC classification number: G09G5/00 ,  G09G5/393 ,  G09G2320/106 ,  G09G2330/022 ,  G09G2360/10 ,  H04N5/14 ,  H04N5/144

Abstract: A motion detection method is adapted for an image display circuit including a motion detection circuit and an arbitration circuit. In this motion detection method, a number of motion quality observation windows are defined. Each motion quality observation window includes a start point and an ending point. In the motion quality observation windows, a write frame count value is adjusted according to a write frame command. At the end point of each motion quality observation window, if the write frame count value is equal to or bigger than a preset count value, an enable signal is outputted to the arbitration circuit to determine whether the image display circuit performs motion display. In the motion quality observation windows, the end point of the i-th motion quality observation window is located between the start point and the end point of the (i+1)-th motion quality observation window, where i is a positive integer.

Abstract translation: 运动检测方法适用于包括运动检测电路和仲裁电路的图像显示电路。 在该运动检测方法中，定义了多个运动质量观察窗口。 每个运动质量观察窗口包括起点和终点。 在运动质量观察窗口中，根据写入帧命令来调整写入帧计数值。 在每个运动质量观察窗口的终点处，如果写入帧计数值等于或大于预设计数值，则向仲裁电路输出使能信号，以确定图像显示电路是否执行运动显示。 在运动质量观察窗中，第i运动质量观察窗的终点位于第（i + 1）运动质量观察窗的起始点和终点之间，其中i是正整数。