Supercharge Your Innovation With Domain-Expert AI Agents!

Camera device and control method thereof, lens unit and control method thereof

A technology of camera equipment and lens unit, which is applied in the field of camera equipment with interchangeable lens and its control, and can solve the problems of difficult lens unit TVAF control and the like

Active Publication Date: 2016-09-07
CANON KK
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in an interchangeable-lens camera system in which the camera body performs TVAF control, since each lens unit that can be attached to the camera body has different optical characteristics, it is difficult to perform good TVAF control for all lens units

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
  • Camera device and control method thereof, lens unit and control method thereof
  • Camera device and control method thereof, lens unit and control method thereof
  • Camera device and control method thereof, lens unit and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In the lens-interchangeable camera system of the first embodiment (Embodiment 1) of the present invention, the imaging apparatus transmits the drive start time of the focus lens and the arrival judgment reference time used as the following reference to the camera system including the focus lens In the lens unit, the reference is used to judge whether the focus lens can reach the target position before the arrival judgment reference moment. The lens unit returns the result of the arrival prediction to the imaging device. This transmission (and return) enables focus control with management of the control timing of the imaging device and the lens unit.

[0030] figure 1 The configuration of the lens-interchangeable camera system of the first embodiment is shown. The lens unit L100 is an interchangeable lens detachably attached to a camera body C100 as an imaging apparatus.

[0031] Light from the subject passes through the imaging optical system inside the lens unit L10...

Embodiment 2

[0114] A second embodiment (Embodiment 2) of the present invention will be described. Embodiment 1 describes the case where the camera body transmits information related to the arrival judgment reference time to the lens unit, and the lens unit predicts whether the focus lens can reach the target position before the arrival judgment reference time, and returns as the arrival prediction the result of. This embodiment will describe a case where the same operations as in Embodiment 1 are realized at a timing different from that in Embodiment 1. The structure of the lens-interchangeable camera system in this embodiment and figure 1 The shown embodiment 1 has the same structure. In addition, the overall flow of TVAF control in this embodiment is the same as image 3 The overall flow of the shown embodiment 1 is the same.

[0115] This example refers to Figure 4 and 5 To mainly explain in the image 3 The reciprocating operation performed in step 302 shown corresponds to the...

Embodiment 3

[0149] A third embodiment (Embodiment 3) of the present invention will now be described. This embodiment describes the case where the camera body transmits information on the timing of defocus amount prediction to the lens unit, and the lens unit predicts the actual drive amount of the focus lens at the defocus amount prediction timing, and the defocus amount The result of the focus amount prediction is converted into the defocus amount on the image sensor surface and returned to the camera body. The structure of the lens-interchangeable camera system in this embodiment and figure 1 The shown embodiment 1 has the same structure. In addition, the overall flow of TVAF control in this embodiment is the same as image 3 The overall flow of the shown embodiment 1 is the same.

[0150] This example refers to Figure 6 and 7 To mainly explain in the image 3 The reciprocating operation performed in step 302 shown corresponds to the control performed by the camera microcomputer ...

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 present invention relates to an imaging device and its control method, and a lens unit and its control method. This imaging apparatus (C100) is for detachably mounting a lens unit (L100) including an imaging optical system (L101~L105) having a focus lens (L105). The imaging apparatus includes: an image sensor (C101) for generating an image signal; and a control part (C106) for communicating with a mounted lens unit (L100) and performing The focus signal of the focus state of the imaging optical system (L101~L105) is used to generate a drive instruction for driving the focus lens (L105) of the mounted lens unit (L100). The control part (C106) transmits the driving instruction and information on predetermined timing to the lens unit, and receives a first signal from the lens unit, wherein the first signal is used to instruct the focus lens Whether the movement based on the driving instruction can be performed so as to satisfy the predetermined timing.

Description

technical field [0001] The invention relates to a lens-interchangeable imaging device and a control method thereof. Background technique [0002] A television auto-focus (TVAF) control method (hereinafter simply referred to as “TVAF control”) is known as a focus control method of an imaging apparatus. This TVAF control generates a focus signal representing the sharpness of a video signal generated by an image sensor for photoelectrically converting a subject image. Move the focus lens to maximize this focus signal. [0003] For TVAF control, the relationship between the focus signal and the position of the focus lens is extremely important. In particular, appropriate management of the generation timing of the focus signal and the driving timing of the focus lens is required for a lens-interchangeable camera system in which the imaging device (camera body) generates the focus A signal and a lens unit detachably mounted to the camera body drive the focus lens. [0004] Jap...

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): H04N5/232G03B13/36G02B7/10
CPCG03B17/14G03B3/10H04N23/663H04N23/673
Inventor 川西敦也
Owner CANON KK
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com