Unlock instant, AI-driven research and patent intelligence for your innovation.

Image sensor

An image sensor, pixel technology, applied in the field of image sensors

Active Publication Date: 2020-11-06
CHENGDU LIGHT COLLECTOR TECH
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide an image sensor to solve the problem of reading high gain and low in the same line read cycle without multiplying the number of ADCs. Gain signal problem

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Image sensor
  • Image sensor
  • Image sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034]The image sensor proposed by the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention. In addition, the structures shown in the drawings are often a part of the actual structure. In particular, each drawing needs to display different emphases, and sometimes uses different scales.

[0035] The circuit structure of the commonly used image sensor in the prior art, such as figure 1 Shown, including pixel array, analog-to-digital converter (ADC), ramp generator, timing controller, line selection decoding driver and output signal processor.

[0036] The pixel array consists of several figure 1 The pixel unit "P" shown is composed. Under the control of the row selection decoding driver...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an image sensor. Pixel low-gain signals and pixel high-gain signals generated by corresponding pixel units are compared with slope signals in a time-sharing mode in the same rowreading period through analog-to-digital conversion units with the number consistent with that of the pixel units to obtain a pixel low gain value and a pixel high gain value, and the pixel low gainvalue and the pixel high gain value are transmitted to an output signal processor for processing so as to obtain a processed image. The number of the analog-to-digital conversion units is consistent with the number of the pixel units, and a pixel low-gain signal and a pixel high-gain signal generated by each pixel unit can be converted through the same analog-to-digital conversion unit in one rowreading period, so that the pixel low-gain signals and the pixel high-gain signals are read in one row reading period on the basis that the number of the analog-to-digital conversion units is not increased, and the problem on how to read the high-gain signals and the low-gain signals in the same row reading period under the condition that the number of ADCs is not multiplied is solved.

Description

technical field [0001] The invention relates to the technical field of integrated circuit design, in particular to an image sensor. Background technique [0002] CMOS Image Sensors (CIS) have been widely used in imaging fields such as video, surveillance, industrial manufacturing, automobiles, and home appliances. The existing commonly used CIS readout circuit structure is based on the column-level single-slope analog-to-digital converter (SS-ADC). The function of the SS-ADC is to compare the signal to be quantized with a slope reference signal. The result is finally quantized by a counter to obtain an N-bit binary digital quantity. [0003] With the advancement of technology, the application side has higher and higher requirements for the dynamic range of CIS, and the pixel signal of the high frame rate high dynamic range (HDR) image sensor needs to be read out in the same row read period. High gain (HCG ) and low-gain (LCG) signals, so two parallel ADCs are required to c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04N5/374H04N5/378
CPCH04N25/76H04N25/75
Inventor 蔡化王勇陈正陈飞苪兴佳
Owner CHENGDU LIGHT COLLECTOR TECH