Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method and device for controlling lens rotation

A technology of a control device and a control method, which is applied in the field of photography, can solve problems such as inaccurate zooming, image virtual focus, and out-of-step, and achieve the effect of wide application prospects

Active Publication Date: 2021-02-02
ZHEJIANG DAHUA TECH CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual situations, the lens may not complete the rotation of the set number of steps, that is, out-of-step phenomenon occurs, and then the image will appear out of focus and inaccurate zooming

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
  • Method and device for controlling lens rotation
  • Method and device for controlling lens rotation
  • Method and device for controlling lens rotation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0133] Embodiment 1: Take the preset number of steps set by the user as 500, the control device determines 10 driver programs, and the prescribed number of steps in each driver program is 50 as an example, combining image 3 Flowchart of the method shown. The preset value of the counter in the control device is set to 10, and the preset value is used to represent the determined number of drivers.

[0134] S301, normally start the control device, the driving device and the lens;

[0135] S302. Initialize the lens, so that the lens returns to a default position;

[0136] S303. The user sets the preset number of steps to be rotated by the lens on the web interface;

[0137] S304. The control device acquires the preset number of steps, and determines ten driver programs according to the acquired preset number of steps;

[0138] S305. The control device sends a first control signal and a first instruction carrying any driver program to the drive device;

[0139] S306. The drivi...

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 discloses a method and device for controlling lens rotation. The control device determines a plurality of driving programs according to the preset number of steps to be rotated by the lens. The control device sends a first command carrying the driver program to the driving device. The driver program controls the lens to complete the rotation of the prescribed number of steps, the driving device feeds back an interrupt signal to the control device, and when the control device determines that there is an unsent driver program, it continues to send the first instruction carrying the unsent driver program to the drive device , so that the driving device controls the lens to turn the prescribed number of steps again according to the driver program. In this way, since the lens is driven multiple times to complete the preset number of steps, the out-of-synchronization problem that occurs when the lens is driven only once to complete the preset number of steps to be rotated is avoided, making the rotation of the lens more accurate and improving the accuracy of the lens rotation. The precision of the control can effectively prevent the out-of-sync phenomenon of the lens.

Description

technical field [0001] The invention relates to the field of imaging, in particular to a method and device for controlling lens rotation. Background technique [0002] In the related art, a motor driver (Motor Driver) is connected between the lens and the control device, and the control device (System on Chip, SoC) can send instructions to the motor driver, so that the motor driver controls the lens to rotate. However, in actual situations, the lens may not complete the rotation of the set number of steps, that is, the phenomenon of out-of-step occurs, and then the phenomenon of image virtual focus and inaccurate zooming will appear. [0003] Based on this, how to accurately control the rotation of the lens is a technical problem to be solved urgently by those skilled in the art. Contents of the invention [0004] Embodiments of the present invention provide a lens rotation control method and device for accurately controlling the lens rotation. [0005] In a first aspect...

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
Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/232
CPCH04N23/66
Inventor 林艳华
Owner ZHEJIANG DAHUA TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com