CN1044993A - Auto focus display for camera - Google Patents
Auto focus display for camera Download PDFInfo
- Publication number
- CN1044993A CN1044993A CN 89100689 CN89100689A CN1044993A CN 1044993 A CN1044993 A CN 1044993A CN 89100689 CN89100689 CN 89100689 CN 89100689 A CN89100689 A CN 89100689A CN 1044993 A CN1044993 A CN 1044993A
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- China
- Prior art keywords
- camera
- auto focus
- scale
- subject
- field depth
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The present invention relates to a kind of implementation method of auto focus display for camera, it provides a kind of novel focusing control device.This device is to utilize computing machine in the camera that field depth, subject are measured a little to be presented at jointly on the scale that distance scale arranged.Use this device to take to have intuitive, clear, characteristics efficiently.
Description
The invention belongs to camera manufacturing technology field, relate to improvement the formula camera focus control method of directly finding a view.
On the traditional formula of directly finding a view camera, rangefinder-type focus realizes by a series of complicated mechanical drive methods between camera lens and the view finder.As the famous leca camera of West Germany, with the focusing ring on the hand rotation camera lens, focusing ring by mechanical hook-ups such as a series of cam links in inside, changes the position of some optical device in the view finder in focusing during operation.Then, whether overlap according to the image on the ad-hoc location in the view finder and judge whether focusing is correct.This mechanical hook-up, the manufacturing process complexity is easy to generate error, in case and the production error, be difficult to find that in time especially this device is not distinguished field depth intuitively.
The present invention seeks to replace traditional mechanical optics focus control method with an electronic zooming display device.
The object of the present invention is achieved like this:
Focal length on the camera lens, aperture, three actual numerical values of distance are passed to the interior computing machine of camera with the method for electronic signal (logical camera lens is connected with contact between the fuselage), and calculate field depth automatically by computing machine.
Utilization is contained in automatic range units such as infrared ray on the camera or ultrasound wave, measures the distance of subject, deposits computing machine in, this measure a little should be able to write down a plurality of.
On camera, be provided with one by computer-controlled, have distance scale can show field depth automatically and a plurality of subject is measured the scale of a position, form an auto focus display.
Field depth and subject are measured demonstration a little, should have different shapes and color respectively.
Display device can be made with liquid crystal, light emitting diode or other semiconductive luminescent materials.
Display device can be installed in the view finder of camera, also can be contained on the camera casing.
The invention provides a kind of brand-new filming control method.Has intuitive, clear, advantage efficiently.Its distinctive feature is, can comparison image ground distinguishes the relation between field depth and the subject.
Accompanying drawing 1,2,3 is the synoptic diagram of show rulers of the present invention.
From the scale of auto focus display of the present invention, the following three kinds of duties in the time of can observing camera:
1, subject is measured point (1) within field depth (2), can be for taking (as accompanying drawing 1).
2, subject is measured point (1) not within field depth (2), needs to change field depth, the position on scale (as Fig. 2).
3, when front and back have 2 subjects to measure point (1), need to adjust field depth (2), make it to cover former and later two and measure point (as Fig. 3).
Claims (6)
1, auto focus display for camera is characterized in that: the scale that distance scale and display device are arranged can demonstrate field depth and a plurality of subject is measured a little automatically on scale.
2, auto focus display according to claim 1 is characterized in that: the demonstration of scale is by the camera computer control.
3, auto focus display according to claim 1 and 2 is characterized in that: the display device on the described scale is made by liquid crystal, light emitting diode, semiconductive luminescent materials.
4, according to claim 1,2 or 3 described auto focus displays, it is characterized in that: the demonstration that the field depth on the scale, subject are measured a little has different shapes respectively.
5, according to claim 1,2 or 3 described auto focus displays, it is characterized in that: the demonstration that field depth on the scale, subject are measured a little has different colors respectively.
6, according to claim 4 or 5 described auto focus displays, it is characterized in that: this device can be arranged in the view finder of camera, or is arranged on the casing of camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89100689 CN1044993A (en) | 1989-02-14 | 1989-02-14 | Auto focus display for camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89100689 CN1044993A (en) | 1989-02-14 | 1989-02-14 | Auto focus display for camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1044993A true CN1044993A (en) | 1990-08-29 |
Family
ID=4853984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89100689 Pending CN1044993A (en) | 1989-02-14 | 1989-02-14 | Auto focus display for camera |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1044993A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100338941C (en) * | 2004-03-12 | 2007-09-19 | 宇东电浆科技股份有限公司 | Image pick-up device having synchronous auto focusing function |
| US7403705B2 (en) | 2004-08-04 | 2008-07-22 | Casio Computer Co., Ltd. | Camera device having automatic focusing function |
| CN102591099A (en) * | 2000-07-31 | 2012-07-18 | 三洋电机株式会社 | Electronic camera and focus controlling method |
-
1989
- 1989-02-14 CN CN 89100689 patent/CN1044993A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102591099A (en) * | 2000-07-31 | 2012-07-18 | 三洋电机株式会社 | Electronic camera and focus controlling method |
| CN100338941C (en) * | 2004-03-12 | 2007-09-19 | 宇东电浆科技股份有限公司 | Image pick-up device having synchronous auto focusing function |
| US7403705B2 (en) | 2004-08-04 | 2008-07-22 | Casio Computer Co., Ltd. | Camera device having automatic focusing function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |