Chengdu Tianma Micro-electronics Co., Ltd.

Chengdu Image Design Technology Co., Ltd.

Fei Chen

Hua Cai

Zheng Chen

Tian Xia

Kerui Xi

Yong Qing Wang

Jing Wen Wang

Zhenyu Jia

Shoufu Jian

Qinyi Duan

Zuocai Yang

Donghua Wang

Ning He

Liping Zhang

Dongquan Hou

Guobo Zeng

A read circuit for an image sensor includes: a first analog-to-digital conversion unit configured to perform successive approximation high-bit analog-to-digital conversion on collected pixel data to obtain high-bit conversion data and residual pixel data; and a second analog-to-digital conversion unit electrically connected to the first analog-to-digital conversion unit and configured to perform single-slope low-bit analog-to-digital conversion on the residual pixel data to obtain low-bit conversion data, wherein a sum of a first conversion accuracy of the first analog-to-digital conversion unit and a second conversion accuracy of the second analog-to-digital conversion unit is equal to a preset conversion accuracy for the pixel data. In accordance with the read circuit, a high image conversion frame rate of the pixel data can be achieved with lower power consumption and less circuit area, and the conversion cycle of the pixel data is effectively shortened.

Read circuit for image sensor

A method and a system for reducing column noise of an image sensor are provided. The method includes: reading dark pixel data in each image frame and reading initial effective pixel data in each image frame, where dark pixels and initial effective pixels are both arranged in N columns; sequentially calculating the dark pixel data to obtain an average value of each column of dark pixels and an entire average value of the dark pixels in each image frame; obtaining a corrected value of each column according to the average value of each column of dark pixels and the entire average value of the dark pixels; and calculating the corrected value of each column and the corresponding initial effective pixel data in each image frame to obtain target effective pixel data. In the method, the dark pixel data is pre-processed.

Method and system for reducing column noise of image sensor

Provided are a liquid crystal antenna, a manufacturing method thereof and a communication device having the liquid crystal antenna. The liquid crystal antenna includes a first metal electrode, a second metal electrode, a third metal electrode, at least two oppositely arranged substrates, and a liquid crystal layer located between the two oppositely arranged substrates. The two oppositely arranged substrates each include a light transmission area. The first metal electrode, the second metal electrode and the third metal electrode within the light transmission area each are a hollowed-out structure, and the light transmission area can be used to test a cell thickness of the liquid crystal cell. Since the cell thickness can be measured, other process parameters can be matched and adjusted, so that a mass production yield of the liquid crystal antennas is improved.

Liquid crystal antenna, manufacturing method thereof and communication device

A display panel, a display device and a driving method of the display panel are provided. The display panel includes: a plurality of touch electrodes; a plurality of control units; switching units. Each switching unit and one of the control units are arranged to be associated with each other. Each switching unit is associated with one of the touch electrodes. Each control unit has a first and a second triggering signal input terminal, different gate driving signals are input to the first and the second triggering signal input terminal respectively. Each control unit is configured to output a control signal to an associated switching unit according to the gate driving signals input to the first and the second triggering signal input terminal. The associated switching unit is configured to output a touch signal to the associated one of the touch electrodes according to the control signal.

Display panel, display device and driving method of display panel

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Chengdu, China

Fei Chen