Slope generation module, quantization control circuit, image sensor and quantization compensation method
By using a ramp generation module and quantization control circuit in a CMOS image sensor, the blurring phenomenon is solved, addressing a technical problem that has not been effectively solved in the prior art. By employing ramp voltage and quantization control circuit, a ramp voltage is generated and a compensation amount is generated based on the pixel power supply current change, thus solving the blurring phenomenon in the image sensor and improving the image quality of the image sensor.
CN121126136APending Publication Date: 2025-12-12SMARTSENS TECH (SHANGHAI) CO LTD
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Patent Information
- Application Number
- CN202410754919.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-12-12
AI Technical Summary
Technical Problem
In existing CMOS image sensors, there is no effective compensation scheme for the blurring phenomenon caused by strong light illumination areas on adjacent weak light illumination areas, resulting in a decrease in image quality.
Method used
A ramp generation module and a quantization control circuit are used to generate a ramp voltage and generate a compensation amount based on the pixel power supply current change of the first pixel to compensate the ramp voltage, thereby improving the quantization result of the second pixel and weakening or canceling the effect of diffusion.
Benefits of technology
It improves the image quality of pixels in low-light areas, weakens or offsets the effect of diffusion, and improves the overall imaging effect of the image sensor.
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Smart Images
Figure CN121126136A_ABST
Abstract
The invention provides a slope generation module, a quantization control circuit, an image sensor and a quantization compensation method, and the slope generation module comprises a slope unit and a compensation unit. The slope unit is used for generating a slope voltage, and the compensation unit is connected with the slope unit and is used for generating a compensation amount according to a current change of a pixel power supply in the first pixel and compensating the compensation amount to the slope voltage so as to obtain a quantization result of the second pixel based on the compensated slope voltage, the first pixels and the second pixels are provided with a pixel power supply through the same power line. According to the slope generation module, the quantization control circuit, the image sensor and the quantization compensation method provided by the invention, the problem that no effective compensation scheme exists to solve the diffusion phenomenon of the image sensor to improve the image quality in the prior art is solved.
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