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Distance measurement device, camera, inspection adjustment device, distance measurement device drive adjustment method, and distance measurement device inspection adjustment method

A technology of distance measuring device and driving circuit, which is applied in the direction of measuring device, reradiation of electromagnetic waves, and parts of color TV, etc., which can solve the problems of small operating room of driving circuit, unstable charge direction, and reduced precision, etc., and achieve enlarged action The effects of room, chip area reduction, and fine structure

Pending Publication Date: 2021-04-09
布鲁克曼科技株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there is a problem that at the moment of switching, the direction to which the charges are oriented is momentarily unstable, the charges do not pass through the desired charge transfer gate, and the accuracy is slightly lowered.
Therefore, in the invention described in Non-Patent Document 1, accurate and fast voltage switching (on / off switching) is required for the transfer gate electrode that performs charge distribution, so there is little operating room for the driving circuit, making design and manufacture difficult. question

Method used

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  • Distance measurement device, camera, inspection adjustment device, distance measurement device drive adjustment method, and distance measurement device inspection adjustment method
  • Distance measurement device, camera, inspection adjustment device, distance measurement device drive adjustment method, and distance measurement device inspection adjustment method
  • Distance measurement device, camera, inspection adjustment device, distance measurement device drive adjustment method, and distance measurement device inspection adjustment method

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no. 1 approach

[0052] like figure 1 As shown, the distance measuring device according to the first embodiment of the present invention has a pixel array unit (X 11 ~X 1m ;X 21 ~X 2m ;…;X n1 ~X nm ) and Peripheral Circuits (71~76, 94-96, NC 1 ~NC m ) based on a two-dimensional image sensor (3D camera) integrated on the same semiconductor chip. In the pixel array section (X 11 ~X 1m ;X 21 ~X 2m ;…;X n1 ~X nm ), multiple pixels X ij (i=1 to m; j=1 to n; m and n are each a positive integer of 2 or more.) They are arranged in a two-dimensional matrix and constitute a square imaging area.

[0053] In addition, in the pixel array section (X 11 ~X 1m ;X 21 ~X 2m ;…;X n1 ~X nm ) has a drive circuit 94 on the upper side, and a horizontal shift register 96 on the lower side along the pixel row X 11 ~X 1m ;X 21 ~X 2m ;…;X n1 ~X nm direction setting, along the pixel column X on the right side of the pixel array section 11 ~X n1 ;X 12 ~X n2 ;…;X 1j ~X nj ;…;X 1m ~X nm The...

no. 2 approach

[0130] The distance measuring device according to the second embodiment of the present invention and figure 1 and figure 2 The configuration of the distance measuring device according to the first embodiment shown is substantially the same. However, the outline of the operation of the control operation circuit 73a of the distance measuring device according to the second embodiment is as follows: Figure 11 actions shown in the flowchart, so with the image 3 The adjustment operation of the distance measuring device according to the first embodiment shown is different. exist Figure 11 In step S21, the time setting logic circuit 731 of the control operation circuit 73a sets the light projection time T o set to the maximum value. Next, in step S22, the time setting logic circuit 731 will repeat the cycle time T c set to the maximum value.

[0131] Furthermore, in step S23, the time setting logic circuit 731 sets the charge transmission time T on set to the maximum value...

no. 3 approach

[0157] The distance measuring device according to the third embodiment of the present invention and figure 1 and figure 2 The configuration of the distance measuring device according to the first embodiment of the present invention shown is substantially the same. However, the outline of the operation of the control calculation circuit 73a of the distance measuring device according to the third embodiment is as follows: Figure 11 actions shown in the flowchart, so with the image 3 The adjustment operation of the distance measuring device according to the first embodiment shown is different. exist Figure 11 In step S21, the time setting logic circuit 731 of the control operation circuit 73a sets the light projection time T o set to the maximum value. Next, in step S22, the time setting logic circuit 731 will repeat the cycle time T c set to the maximum value.

[0158] Furthermore, in step S23, the charge transfer time T on set to the maximum value. Time setting val...

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Abstract

The present invention is provided with: a light-emitting part (91); a drive circuit (94) that supplies transfer signals, at different timings with an offset time interposed therebetween, to a sorting gate structure in which signal charges photoelectrically converted in a light reception region for receiving reflection light from an object (92) are sorted and transferred to a plurality of charge storage regions arranged around the light reception region; a distance calculation circuit (71) that receives, as signals, input of signal charges stored in the plurality of charge storage regions and calculates a distance to the object (92); and a control calculation circuit (73a) that generates, from a result of calculation outputted by the distance calculation circuit (71), a signal for controlling operation of the drive circuit (94), and supplies the signal to the drive circuit (94).

Description

technical field [0001] The present invention relates to a distance measuring device such as a distance measuring device and a 3D imaging device, and particularly relates to a CMOS image sensor (CIS) or a distance measuring device using pixels of the CIS, a camera equipped with the distance measuring device, and inspection and adjustment of the distance measuring device The driving adjustment method and the checking adjustment method of the device and the distance measuring device. Background technique [0002] In a conventional lock-in pixel type solid-state imaging device driving method, switching between on and off periods of a plurality of charge transfer gates included in a pixel is performed almost simultaneously. Therefore, there is a problem that at the moment of switching, the direction of the charge becomes unstable instantaneously, the charge does not pass through the desired charge transfer gate, and the accuracy is slightly lowered. Based on such a background, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/481G01S17/894G01S17/10H04N5/3745
CPCG01S17/894G01S17/10G01S7/4863G01S7/497G01S7/4865H04N25/77G01S17/14G01S17/18G01S17/26
Inventor 永濑正规
Owner 布鲁克曼科技株式会社