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Image pickup apparatus and image pickup method

A technology of imaging device and imaging element, which is applied in focusing devices, image communication, television, etc., can solve the problems of increased noise, increased power consumption, and difficulty in implementation.

Inactive Publication Date: 2012-01-04
OLYMPUS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, in recent years, image data for LV has been increasing in pixels towards VGA level and SVGA level as mentioned above. When considering simply increasing the frame rate to acquire image data for both AF and LV, it is necessary to be able to read out the image data at a high speed. The image pickup element and the drive circuit for the image pickup element have problems such as increased power consumption or increased noise due to temperature rise of the image pickup element.
Furthermore, the current high-speed readout image sensor uses LVDS (Low Voltage Differential Signaling, Low Voltage Differential Signaling), which can transmit data at a high speed, to read pixel data. However, there is a fundamental problem that even if this LVDS is used, every There is an upper limit to the amount of read data per unit time
Therefore, simply increasing the frame rate to read, for example, SVGA-level image data at a frame rate of 300fps is currently difficult to achieve.

Method used

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  • Image pickup apparatus and image pickup method
  • Image pickup apparatus and image pickup method
  • Image pickup apparatus and image pickup method

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Experimental program
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Embodiment approach 1

[0034] Figure 1 to Figure 15 Showing Embodiment 1 of the present invention, figure 1 It is a block diagram showing the configuration of the imaging device.

[0035] Such as figure 1 As shown, the imaging device has: a photographing optical system 1 having a zoom lens 2, a diaphragm 3 and a focusing lens 4; a shutter 5; an imaging element 6; an imaging element driving unit 7; an AF detecting unit 8; an image processing unit 9; Display section 11 and display section 10 of electronic viewfinder (EVF) 12 ; aperture / lens drive section 14 ; lens information detection section 15 ; camera operation section 16 ; In addition, a memory card 13 is also described in the drawing, but since the memory card 13 is configured to be detachable from the imaging device, it does not need to be a unique configuration of the imaging device.

[0036] The imaging optical system 1 forms an optical image of a subject on the imaging surface of the imaging element 6 .

[0037] The zoom lens 2 is used ...

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Abstract

The invention provides an image pickup apparatus capable of realizing the high-resolving power display and performing the high-speed focusing by a contrast AF simultaneously. The image pickup apparatus has a photography optical system (1) having a focusing lens (4), a shooting element (6) for converting the optical image formed by the photography optical system (1) into an picture signal and outputting the same, a shooting element driving part (7) controlled to improve the frame frequency of the shooting element (6) compared with the depth of a scene, an AF detecting part (8) for, based on the picture signal output from the shooting element (6), detecting the definition of the optical image imaged on the shooting element (6), and an diaphragm / lens driving part (14) for driving the focusing lens (4) according to the definition.

Description

technical field [0001] The present invention relates to an imaging device and an imaging method for performing focus adjustment based on an image signal output from an imaging element. Background technique [0002] In the past, in imaging devices such as cameras, contrast AF (or mountain-climbing AF) was sometimes used as an AF method. Adjust the focus to increase the sharpness of the detection. [0003] Not only video cameras but also compact digital cameras, for example, sometimes perform the above-mentioned contrast AF based on moving images (shooting preparation images) acquired for live view (LV) display on the rear display unit. [0004] In addition, as an AF method for autofocusing based on light beams from the photographing optical system, phase difference AF has conventionally been widely used in digital single-lens reflex cameras. On the other hand, in recent years, digital single-lens reflex cameras have also been sold in various models with a live view function...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B13/36H04N5/243
Inventor 本田努
Owner OLYMPUS CORP