Unlock instant, AI-driven research and patent intelligence for your innovation.

Lens drive device, image-capturing device, and electronic apparatus

A technology of a lens driving device and a camera device, which is applied to focusing devices, mechanical equipment, televisions, etc., can solve the problems of the focus evaluation value fluctuating up and down, the lens cannot be stopped, and the evaluation target position cannot be recognized.

Inactive Publication Date: 2011-09-14
PANASONIC CORP
View PDF8 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in the imaging device in Patent Document 3, there is a problem that the lens cannot be stopped at a desired target position (lens position where the lens should originally stop) depending on the shooting situation or the object.
For example, when shooting when the sun is setting, or when shooting in a place where the sun is difficult to shine, or when there are many subjects, the focus evaluation value may fluctuate up and down as the lens moves, and the evaluation target may not be recognized. The situation of the location

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
  • Lens drive device, image-capturing device, and electronic apparatus
  • Lens drive device, image-capturing device, and electronic apparatus
  • Lens drive device, image-capturing device, and electronic apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0032] Hereinafter, the electronic device in Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 9 . Figure 1A , Figure 1B It is a perspective view showing the electronic device in Embodiment 1 of the present invention. figure 2 It is an overall schematic diagram showing the imaging device mounted in the electronic device according to Embodiment 1 of the present invention.

[0033] The mobile phone 100 as the electronic device of this embodiment is a so-called foldable mobile phone. Figure 1A It is a perspective view of a direction in which a main screen (first display 110 described later) can be visually recognized from the state where the foldable mobile phone is opened. The above-mentioned figure B is a perspective view from the rear side (the side opposite to the surface embedded in the home screen) of the mobile phone shown in the above-mentioned figure A.

[0034] The mobile phone 100 of the present embodiment is a mobile phone equip...

Embodiment approach 2

[0108] Hereinafter, for the imaging device 300 of this embodiment, refer to Figure 8 , Figure 9A , Figure 9B to explain. Figure 8 It is an overall schematic diagram showing the imaging device 300 of this embodiment. Figure 9A It is a correlation diagram of time and lens position of the imaging device 300 of the same embodiment. Figure 9B It is a correlation diagram of time and focus evaluation value of the imaging device 300 of the same embodiment. Like Embodiment 1, the imaging device of this embodiment is mounted on electronic equipment such as a mobile phone.

[0109] The imaging device 300 of this embodiment, such as Figure 8 As shown, it has: common with the contained lens 2 in the direction of the optical axis (for example, through the contraction of the actuator 4, the lens 2 is in the Figure 8 The lens barrel 3 movable on the shown single arrow A' direction); the imaging element 5 that receives light through the lens 2; and the moving unit 14 that moves t...

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

An lens drive device, an image-capturing device, and an electronic appratus are provided, with the lens drive device provided with a detection section (10) for detecting that the resistance value of an actuator (4) consisting of a shape memory alloy and moving a lens (2) is being maintained within a predetermined range. In order to obtain image-capturing data for each field provided in a focus region, the lens (2) is moved step-by-step from a position corresponding to a first field. Then, a target position at which the lens (2) is finally positioned is calculated from the obtained image-capturing data, and the lens (2) is positioned at the target position on the basis of the result of the calculation. The configuration enables stable and reliable data to be obtained.

Description

technical field [0001] The present invention relates to a lens driving device that drives a lens movable in the optical axis direction, an imaging device having an imaging element that receives light through the lens, and electronic equipment including the imaging device. Background technique [0002] Conventionally, as a lens driving device having a shape-memory alloy actuator, there is known a lens driving device configured to move a lens in a predetermined direction by supplying electric power to the actuator to cause the actuator to heat and contract. , and the actuator is elongated by natural heat dissipation, thereby moving the lens in the opposite direction. [0003] An imaging device equipped with this lens driving device controls the position of the lens using a resistance value corresponding to the amount of deformation of the actuator, that is, a resistance value that decreases by contraction and increases by elongation (for example, patent Literature 1). [000...

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 Applications(China)
IPC IPC(8): G02B7/08F03G7/06G02B7/04G02B7/36G03B13/36
CPCH04N5/2254G03B13/36H04N5/23212G02B7/08G02B13/001H04N23/675H04N23/63H04N23/55H04N23/67
Inventor 畑和宏伊奈裕彦
Owner PANASONIC CORP