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Camera shooting device

一种摄像装置、摄像元件的技术，应用在静态摄像机、图像通信、电视等方向，能够解决图像数据画质恶化、噪声增加、摄像元件温度上升等问题

Inactive Publication Date: 2008-08-27
OLYMPUS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in an imaging device having an optical viewfinder and an electronic viewfinder, when the electronic viewfinder is used, the temperature of the imaging element such as the CCD increases due to continuous driving of the imaging element.
The temperature rise of the imaging element increases the noise called dark noise (Dark Noise) or fixed pattern noise (Fixed Pattern Noise), so when using an electronic viewfinder, there is a problem that the image quality of the obtained image data deteriorates

Method used

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no. 1 Embodiment approach

[0033] Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 11 . The present embodiment described below is applied to a single-lens reflex (SLR: single-lens reflex) auto focus type still camera (hereinafter referred to as a single-lens reflex camera) with an interchangeable lens as a general imaging device. in the present invention. In addition, electronic still cameras are generally called electronic still cameras, digital still cameras, digital still cameras, and the like.

[0034] FIG. 1 is a block diagram showing the main configuration of a single-lens reflex camera. 2 to 5 are flowcharts of the main routine executed in the single-lens reflex camera. Figures 6 and 7 are flowcharts of the timer interrupt routine.

[0035] First, the configuration of the single-lens reflex camera of this embodiment will be described.

[0036] A single-lens reflex camera 1 as an imaging device according to the present embodiment is config...

no. 2 Embodiment approach

[0200] Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. 11 to 18 . The single-lens reflex camera of this embodiment differs from the first embodiment in the means for measuring the noise level of the imaging element. Therefore, only this point of difference will be described, and the same reference numerals will be assigned to the same configurations as those of the first embodiment, and descriptions thereof will be omitted.

[0201] In the above-mentioned first embodiment, by measuring the temperature T of the imaging element 130, the magnitude (noise level) of the noise generated in the imaging element 130 can be indirectly calculated from the previously obtained relationship between the temperature T and the noise level. Then, switching between the OPT mode and the EVF mode is controlled based on the calculated noise level.

[0202] In contrast, in this embodiment, light-shielded optical black (optical black) pixels (herei...

no. 3 Embodiment approach

[0235] Next, a third embodiment of the present invention will be described with reference to FIGS. 19 to 24 .

[0236] The outline of the operation of the first embodiment is as follows: when the temperature of the imaging element exceeds Tth2, if the EVF mode is set, the viewfinder mode is automatically changed from the EVF mode to the OPT mode. Also, setting the EVF mode as the viewfinder mode is prohibited until the temperature of the imaging element reaches Tth1 (

[0237] When the temperature of the imaging element exceeds Tth1 in the state set to the EVF mode, an operation to suppress the temperature rise of the imaging element is performed. That is, the frequency of the clock signal for driving the imaging element is reduced. By reducing the frequency of the clock signal, the frame frequency of the EVF mode will be reduced. Therefore, the amount of image data for one frame read from the imaging eleme...

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Abstract

The invention aims to provide an image pick-up device for preventing temperature of pick-up element from increasing to cause image deterioration when using the electronic viewfinder. Comprising objected to be picked-up, the image pick-up device is used as image pick-up unit for picking-up image data, capable of optically observing any one of the first observation means of the object to be picked-up, and the second observation means for electronically observing the object to be picked-up according to image obtained by the image pick-up unit and displayed on the display unit, in order to observe the object to be picked-up, composed of a temperature detection unit for detecting temperature of the image pick-up unit; an observation means switching unit for switching the first observation means and the second observation means; and a control unit for preventing the observation means switching unit from switching from the first observation means to the second observation means when the temperature is over the first judging value.

Description

technical field [0001] The present invention relates to an imaging device capable of selecting between a first observation mode of optically observing a subject image and a second observation mode of electronically observing the subject image based on an image captured by an imaging unit and displayed on a display unit. Either side of the camera, observe the above-mentioned subject. Background technique [0002] In a so-called digital camera, that is, an imaging device (electronic camera), two observation methods are known: the method of observing the subject image through an optical viewfinder composed of optical components such as a pentaprism and a Paul prism; The live view display (Live View Display) (through image display (Through Image Display)) on the image display unit such as CCD image sensor (image sensor), CMOS image sensor and other imaging elements to obtain the image data, thus through the live view display And the electronic way of observing the subject image...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232H04N5/225
CPCH04N5/23293H04N5/23245H04N5/361H04N2101/00H04N23/667H04N25/63
Inventor 伊藤顺一井出昌孝法华津健
Owner OLYMPUS CORP
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