Image capture device having image signal processor for generating lens control signal
AssigneeHanwha Techwin Co., Ltd.
InventorsHongwoo Kim, Jaehoon Lee
Life of this patent
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Abstract
Provided is a method for controlling a video lens in an image capture device which uses a complementary metal oxide semiconductor (CMOS) image sensor. A vertical sync (Vsync) signal and a horizontal sync (Hsync) signal are separately generated and then synthesized. Thereafter, the resulting signal is synthesized with a DC level mode luminance signal to generate a lens control signal for controlling the video lens.
Claims20
An image capture device comprising:
- a receiver configured to receive a digital signal from a complementary metal oxide semiconductor (CMOS) image sensor;
- a sync signal generator configured to generate a vertical sync (Vsync) signal and a horizontal sync (Hsync) signal by using the digital signal and generate a composite sync (Csync) signal by synthesizing the Vsync signal and the Hsync signal;
- a luminance signal generator configured to generate a luminance signal included in the digital signal in a pulse width modulation (PWM) mode and convert the PWM mode luminance signal into a direct current (DC) level mode luminance signal;
- and
- a lens control signal generator configured to generate a lens control signal by synthesizing the DC level mode luminance signal and the Csync signal.
An image capture device comprising:
- a receiver configured to receive a digital signal from a complementary metal oxide semiconductor (CMOS) image sensor;
- a vertical sync (Vsync) signal generator configured to generate a Vsync pulse;
- a horizontal sync (Hsync) signal generator configured to generate a Hsync pulse;
- a composite sync (Csync) signal generator configured to generate a Csync signal by inputting the Vsync pulse and the Hsync pulse in a synchronized state into an AND gate;
- a luminance signal generator configured to convert a luminance signal included in the digital signal into a direct current (DC) level mode signal of a variable amplitude;
- and
- a lens control signal generator configured to generate a lens control signal for controlling an iris of a video lens by using the DC level mode luminance signal and the Csync signal.
A method for controlling a video lens in an image capture device using a complementary metal oxide semiconductor (CMOS) image sensor, the method comprising:
- receiving a digital signal from the CMOS image sensor;
- generating a vertical sync (Vsync) signal on the basis of the digital signal;
- generating a horizontal sync (Hsync) on the basis of the digital signal;
- generating a composite sync (Csync) signal by synthesizing the Vsync signal and the generated Hsync signal;
- generating a luminance signal included in the digital signal in a pulse width modulation (PWM) mode and converting the PWM mode luminance signal into a direct current (DC) level mode luminance signal of a variable amplitude by integrating the PWM mode luminance signal;
- and
- generating a lens control signal by loading the DC level mode luminance signal into the Csync signal at a section other than a Vsync signal section and a Hsync signal section in the Csync signal.
Dependencies are inferred from the claim text.