CN2562208Y

CN2562208Y - Self-focusing mechanism of camera

Info

Publication number: CN2562208Y
Application number: CN 02201342
Authority: CN
Inventors: 黄维邦; 刘迪伦
Original assignee: Kinpo Electronics Inc
Current assignee: Kinpo Electronics Inc
Priority date: 2002-01-11
Filing date: 2002-01-11
Publication date: 2003-07-23
Anticipated expiration: 2012-01-11

Abstract

The utility model relates to an automatic focusing mechanism of a camera and provides the automatic focusing mechanism which can correctly and rapidly find out focusing position according to the object seen by a user, does not need to repeatedly move a lens group for a plurality of times and facilitates the camera to rapidly and correctly have the automatic focusing. The automatic focusing mechanism consists of a distance sensor, a signal processing unit, a motor driving crystal plate(IC) and a motor; wherein, the distance sensor is arranged in a sightseeing window of the camera. When the user looks at the images which are to be shot through the sightseeing window, the distance sensor can immediately measure the variable values of the lens and cornea of the user looking at distant object or near object by emitting and receiving ultrared rays which are reflected. After detecting the signals of he variable values, the signal processing unit transmits the signals to the driving crystal plate(IC) to drive the motor, and the motor drives the focusing lens group to move to the designated position; therefore, the automatic focusing operation is completed.

Description

The autofocus mechanism of camera

Technical field

The relevant camera autofocus mechanism of the utility model especially utilizes crystalline and cornea in the sensing eyeball to see the variable quantity of far and near object with respect to warship, as the camera data of focusing automatically.

Background technology

No. the 315427th, automatic focusing mechanism, for example Taiwan patent announcement of general digital camera, the automatic focusing mechanism and the method that are used for the digital electronic camera zoom lens are disclosed, be provided with a focusing evaluation of estimate generator to calculate the focusing evaluation of estimate of image, drive focusing motor according to this focusing evaluation of estimate and move eyeglass group, to carry out the automatic focusing of this camera.General using is calculated the mode that the focusing evaluation of estimate is focused automatically, need repeatedly move back and forth eyeglass group, carry out that omnidistance coarse scan is taken aim at and the follow-up supervisor that carefully scans, obtain the evaluation of estimate of each position, analyze, relatively find out the position of focusing again according to the focusing mode, mobile again eyeglass group arrives the position of this focusing; Need the CD-ROM drive motor of repetitiousness during its focusing, very expend time in, also increase the attrition rate of motor and transmission component; And if when the image that absorbed is not to use the object that the person will take, then need repeat the focusing action again, especially waste time of focusing.

The utility model content

Fundamental purpose of the present utility model, can correctly reach and find out focusing position fast according to the object that the user saw in that a kind of autofocus mechanism of camera is provided, and does not need repeatedly repetitiousness to move eyeglass group.

For achieving the above object, the autofocus mechanism of a kind of camera that the utility model provides is included in the camera and is formed in conjunction with the distance sensing device, signal processing unit, motor driven wafer (IC) and the motor that are connected with lead respectively; This distance sensing device is installed in the picture window of camera; Measure in user's eyeball crystalline and cornea to observing the variable quantity of far away or nearly object can utilize this distance sensing device; After this signal processing unit is detected the information and processing of this variable quantity,, motor is driven focus lens group, move to assigned address, finish automatic focusing with motor driven wafer control motor.

Wherein this signal processing unit connects focal length adjustment keyswitch in addition.

Wherein this signal processing unit comprises reservoir.

Wherein this distance sensing device is an infrared ambulator.

Description of drawings

Other purposes of the present utility model, effect and embodiment see also accompanying drawing and are described in detail as follows, wherein:

Fig. 1 is the utility model structural representation.

Embodiment

See also shown in Figure 1, the autofocus mechanism of a kind of camera of the present utility model is formed in conjunction with the distance sensing device 11, signal processing unit 12, motor driven wafer (IC) 13 (can adopt C9901 type wafer) and the motor 14 that are connected with lead respectively in camera 10; This distance sensing device 11 is installed in the viewing window 15, its structure is just like general infrared ambulator, can and receive the infrared ray that reflects by the emission infrared ray, the eyeball 20 of measuring the user see through picture window 14 watch when wanting shot object, the variation information of its crystalline 21 and cornea 22, this variation information can be watched the far and near different differences that have of wanting shot object with the work user, when for example the user will take object far away, its crystalline 21 becomes big with cornea 22 curvature, and it is slower that infrared reflection is returned; Otherwise when taking near object, crystalline 21 diminishes with cornea 22 curvature, and infrared reflection is returned comparatively fast, therefore variant in time existence; This signal processing unit 12 detects after measured these of this distance sensing device 1 change information, promptly carry out calculation process and produce control signal, and the controlling signal after will handling is sent to motor driven wafer 13, this motor driven wafer 13 drives the position that eyeglass group 16 moves to focusing according to this control information control motor 14, finishes the action of automatic focusing.

The utility model is the delta data of crystalline 21 and cornea 22 in measured user's eyeball, compares with the average data and the position of making the camera focus; If under identical focal length, when the variable quantity of user's crystalline 21 and the variable quantity of cornea 22 and average differs greatly, then through the utility model automatically to defocused, can produce focus error, the user can see fuzzy image.So the also configurable focal length of the utility model is adjusted button 17, the usefulness of aforementioned by way of compensation focus error.When this processing unit 12 detects after this focal length adjusts the adjustment signal that button 17 transmitted, be about to controlling signal and reach motor driven wafer 13, make its control motor 14 drive the position that eyeglass groups 16 move to focusing, the user can see image clearly.Signal processing unit 12 of the present utility model comprises reservoir, can store the information of different users's eyeball variation characteristic, reach different eyeball variation information correspondences and make motor driven wafer CD-ROM drive motor move the eyeglass cohort, make the operation of automatic focusing more accurate to burnt meeting position relevent information.

When the utility model is watched object by the user, the variable quantity of sensing user eyeball, and this variable quantity converted to make the automatically information of focusing of camera, so user's eye gaze thereunto, can make camera automatically focusing make the object of shooting meet user's demand fully thereunto, do not need as commonly used, out of style when the focal length of shot object, must repeat the action of focusing and taking again.

The utility model do not need as digital camera make motor drive mirror door cohort repeatedly to move back and forth, just can find the position of focus, so can reduce the spent time of automatic focusing, and can reduce the attrition rate of motor and transmission component.

The above record, only for utilizing the embodiment of the technology contents that the utility model does, modification, variation that any personnel that are familiar with this technology use the utility model to do all belong to the claim of the utility model opinion, and not only for what embodiment.

Claims

1, a kind of autofocus mechanism of camera comprises that distance sensing device, signal processing unit, motor driven wafer and motor form; It is characterized in that:

This distance sensing device is incorporated in the picture window of camera;

This signal processing unit connects this distance sensing device with lead;

This motor driven wafer connects this signal processing unit with lead;

This motor connects this motor driven wafer with lead and drives focus lens group.

2, autofocus mechanism as claimed in claim 1 is characterized in that, wherein this signal processing unit connects focal length adjustment button with lead in addition.

3, autofocus mechanism as claimed in claim 1 or 2 is characterized in that, wherein this signal processing unit comprises reservoir.

4, autofocus mechanism as claimed in claim 3 is characterized in that, wherein this distance sensing device is an infrared ambulator.