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Liquid crystal micro-lens array imaging device, driving method and electronic equipment

A liquid crystal microlens and lens array technology, applied in the field of imaging, can solve the problem of reducing the dynamic range of image sensors and achieve the effect of reducing light efficiency

Pending Publication Date: 2021-04-13
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is to provide a liquid crystal microlens array imaging device, a driving method, and an electronic device to solve the problem in the prior art that the dynamic range of the image sensor is reduced by improving the light efficiency of the image sensor of the electronic device

Method used

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  • Liquid crystal micro-lens array imaging device, driving method and electronic equipment
  • Liquid crystal micro-lens array imaging device, driving method and electronic equipment
  • Liquid crystal micro-lens array imaging device, driving method and electronic equipment

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Embodiment 1

[0026] see Figure 1 to Figure 4 , the embodiment of the present invention discloses a liquid crystal microlens array imaging device, including: a first lens array 10, a second lens array 20, an image sensor, a photosensitive area 81 arranged on the image sensor, and a controller 90; the first The second lens array 20 is located above the first lens array 10, and changes the refractive index according to the driving voltage. The second lens array here can be a liquid microlens array or a liquid crystal microlens array; the first lens array 10 is located on the Between the photosensitive area 81 and the second lens array 20, it is used to focus the incident light 60 on the photosensitive area 81 after refracting the second lens array 20; The receiving amount adjusts the driving voltage of the second lens array 20 . Each image sensor is provided with a photosensitive area 81 . When the cumulative light receiving amount of the photosensitive area 81 is relatively large, the dri...

Embodiment 2

[0061] see Figure 5 , the present invention also discloses a driving method based on the aforementioned liquid crystal microlens array imaging device, the driving method comprising:

[0062] S10. Comparing the cumulative light-receiving amount of the photosensitive area with a preset value;

[0063] S20. Sending a driving voltage command according to the comparison result. The driving voltage command includes one of the first driving voltage command, the second driving voltage command and the third driving voltage command.

[0064] S30 , outputting a driving voltage according to the driving voltage command to drive the second lens array 20 to work. Therefore, the automatic adjustment of the refractive index of the second lens array 20 is realized, and the light efficiency of the image sensor is improved while the dynamic range of the image sensor is improved.

[0065] Wherein, S30, outputting a driving voltage according to the driving voltage instruction to drive the second ...

Embodiment 3

[0074] The present invention also discloses an electronic device, including a liquid crystal microlens array imaging device, the liquid crystal microlens array imaging device is the liquid crystal microlens array imaging device described in any one of the first aspect and / or adopts any one of the second aspect One of the drive methods described. The liquid crystal microlens array imaging device adjusts the driving voltage of the second lens array 20 to adjust the driving voltage of the second lens array 20 through the cumulative light receiving amount of the photosensitive area 81 when the cumulative light receiving amount of the photosensitive area 81 is relatively large. The refractive index makes the focal point of e light deviate from the photosensitive area 81, thereby reducing the light efficiency of the image sensor; when the cumulative light receiving amount of the photosensitive area 81 is small, no driving voltage is applied to the second lens array 20, and the light ...

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Abstract

The invention relates to the technical field of imaging, in particular to a liquid crystal micro-lens array imaging device, a driving method and electronic equipment. The liquid crystal micro-lens array imaging device comprises a first lens array, a second lens array, an image sensor and a controller, wherein each image sensor is provided with a photosensitive area, the second lens array is located above the first lens array, and the refractive index of the second lens array can be changed under driving voltage; the first lens array is located between the photosensitive area and the second lens array, and incident light rays refracted by the second lens array are focused on the photosensitive area; and the controller adjusts the driving voltage of the second lens array according to the accumulated light receiving amount of the photosensitive area. The dynamic range of the image sensor is improved while the light efficiency of the image sensor is improved.

Description

technical field [0001] The invention relates to the field of imaging technology, in particular to a liquid crystal microlens array imaging device, a driving method and electronic equipment. Background technique [0002] The image sensor uses the photoelectric conversion function of the photoelectric device to convert the light image on the photosensitive surface into an electrical signal proportional to the light image. Compared with photosensitive elements of "point" light sources such as photodiodes and phototransistors, the image sensor is a functional device that divides the light image on its light-receiving surface into many small units and converts it into usable electrical signals. Because image sensors have the characteristics of small size, light weight, high integration, high resolution, low power consumption, long life, and low price, they are widely used in various imaging devices. [0003] In existing imaging devices, a layer of lens array is usually placed on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/225G02B3/14G02B3/00G02F1/29
CPCG02B3/14G02B3/0037G02F1/29H04N23/54H04N23/57H04N23/55
Inventor 陈晓西叶茂杜爽杨艺佳
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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