High-frame-rate image sensor
An image sensor and high frame rate technology, which is applied in the direction of image communication, TV, color TV parts, etc., can solve the problems of inability to realize multi-row parallel readout, affect the imaging quality, and limit the image frame rate, etc., and achieve shortening The effects of stabilization time, increased frame rate, and reduced load capacitance
Pending Publication Date: 2020-02-07
GALAXYCORE SHANGHAI
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Problems solved by technology
In the existing image sensors, the signal output lines of the pixel units in each column are connected to each other and coupled to the same column analog-to-digital converter, which cannot realize multi-row parallel readout, and the image frame rate is limited. During high-speed photography, it is easy to Produce jelly effect, affecting image quality
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[0020] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar extensions without violating the connotation of the present invention, so the present invention is not limited by the specific implementations disclosed below.
[0021] Secondly, the present invention is described in detail by means of schematic diagrams. When describing the embodiments of the present invention in detail, for convenience of explanation, the schematic diagrams are only examples, which should not limit the protection scope of the present invention.
[0022] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be described in detail below in conjunction with the accompanying drawings.
[00...
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The invention provides a high-frame-rate image sensor. The sensor comprises pixel units arranged in an array mode, signal output lines of the pixel units in the same column are divided into an upper part and a lower part from the middle, the signal output line of the upper part is coupled to the column analog-digital converter of the upper part, and the signal output line of the lower part is coupled to the column analog-digital converter of the lower part so as to reduce load capacitance of the signal output lines. According to the high-frame-rate image sensor, the load capacitance of the signal output lines of the pixel units is reduced, the stabilization time of the output signals of the pixel units is shortened, the frame rate of the image sensor is improved, and when the high-frame-rate image sensor is used for high-speed photography, the jelly effect can be reduced, and the imaging quality is improved.
Description
technical field [0001] The invention relates to a high frame rate image sensor. Background technique [0002] At present, image sensors have been widely used in various electronic products such as still digital cameras, camera phones, digital video cameras, medical imaging devices (such as gastroscopes), and automotive imaging devices. [0003] Such as figure 1 As shown in FIG. 1 , conventional image sensors generally use column-parallel analog-to-digital converters, that is, each column is implemented using an analog-to-digital converter. The column-parallel analog-to-digital converter usually includes: a comparator, a ramp generator, a counter, a storage unit and a digital processing unit. The principle is to compare the reference voltage and signal voltage output by the pixel unit with the ramp signal generated by the ramp generator. The digital output of the reference voltage and the signal voltage is compared and stored in the storage unit, and the digital processing ...
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IPC IPC(8): H04N5/369H04N5/378
CPCH04N25/70H04N25/75
Inventor 赵立新乔劲轩李鹏
Owner GALAXYCORE SHANGHAI