Display device for camera

• US 4,717,936 A
• Filed: 04/30/1984
• Issued: 01/05/1988
• Est. Priority Date: 05/02/1983
• Status: Expired due to Term

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Suzuki, Nobuyuki, Shimizu, Masami
• Primary Examiner(s): ADAMS JR, RUSSELL E
• Application Number:
  US06/605,625
• Time in Patent Office: 1,345 Days
• Field of Search: 354/442, 354/474, 354/475, 354/471
• US Class Current: 396/287
• CPC Class Codes: G03B 17/20 visible in viewfinder
• CPC Class Codes: G03B 2217/005 Blur detection

Abstract

A display device for a display in a camera. Within a view finder thereof in particular are arranged illuminating light emitting elements to illuminate a display member which is provided with a plurality of photography mode display marks. A segment light emitting element displays a computed value of photography information obtained from photography information computing apparatus.

Claims

1. A display device for a camera, comprising:

an external display arrangement for displaying an exposure information setting value;

a view finder display arrangement for displaying a computed exposure value;

an eyepiece shutter for closing a view finder;

photographic information computing means;

first driving means for displaying a signal produced from said photographing information computing means by means of said view finder display arrangement;

stopping means for stopping the operation of said view finder display arrangement in response to the operation of said eyepiece shutter; and

second driving means for displaying the signal of said photographic information computing means at said external display arrangement in response to the operation of said stopping means.

2. A display device for a camera according to claim 1, further comprising:

photographing mode display means for displaying a selected photographing mode;

switch means arranged to operate in response to an aperture stopping down operation;

stopping means for stopping the display operation of said photographing mode display means in response to the operation of said switch means; and

means for displaying an aperture stopping-down operation in response to said switch means.

3. A display device for a camera according to claim 2, further comprising:

third driving means for displaying computed information of said photographic information computing means at said view finder display arrangement on the basis of signals from said switch means and stopping means.

4. A display device for a camera, comprising:

(a) a circuit substrate with a plurality of illuminating light emitting elements and a 7-segment light emitting element having at least two figures mounted on the same surface;

(b) a light shield plate which is positioned superposedly over said circuit substrate and has light passing holes formed at positions of said substrate to correspond to said illuminating light emitting elements and said 7-segment light emitting element;

(c) a display plate which is positioned superposedly over said light shield plate and has photographing mode marks placed at positions of said substrate to correspond to said illuminating light emitting elements;

(d) photographing mode selecting means;

(e) photographing information computing means;

(f) a first display circuit which causes said illuminating light emitting elements to emit light according to a selection mode by said photographing mode selecting means; and

(g) a second display circuit which displays the photographing information in the form of numerals with said 7-segment light emitting element by an output of said photographing information computing means.

5. A display device for a camera a single segment construction for forming the lowest figure as "0" only, the highest figure as "1" only, a mid point as a dot only and 7-segment construction for forming other figures.

6. A display device for a camera, comprising:

(a) display means having four figures for display, said display means including;

(1) the lowest figure arranged to display "0" only;

(2) the second from the lowest figure having a first variable numeral display segment construction;

(3) the third from the lowest figure having a second numeral variable display segment construction; and

(4) the highest figure arranged to display "1" only;

(b) photographing information computing means for computing a shutter time; and

(c) a display circuit for causing said display means to make a display of a shutter time computed by said computing means, said display circuit displaying at the time when said computed shutter time is as long a time as one second or longer, numeral information indicating a shutter time by said second variable numeral segment construction at the third figure from the lowest or by said "1" only segment construction at the highest figure, while displaying a long shutter time information by said first variable numeral segment construction at the second figure from the lowest.

7. A display device for a camera, comprising:

(a) photographing mode selecting means;

(b) photographing information computing means for computing photographing information at a photographing mode selected by said photographing mode selecting means;

(c) first display means having a photographing mode display construction and a segment construction which can display numerals and being positioned within a view finder;

(d) second display means having a photographing mode display construction and a segment construction which can display numerals and being positioned at the outside of a camera body;

(e) first display control means for making a mode display control of said photographing mode display construction by said first display means based on an output from said photographing mode selecting means, and at the same time making a computed value display control of said segment construction by said first display means based on an output of said photographing information computing means; and

(f) second display control means for making a mode display control of said photographing mode display construction by said second display means based on an output from said photographing mode selecting means, and at the same time making a computed value display control of the segment construction by said second display means.

8. A display device according to claim 7, wherein said photographing mode display construction at said first and second display means is arranged to display a photographing mode by codes, and said codes are arranged so that a number of numerals in the second display means is larger than that in the first display means.

9. A display device according to claim 7, wherein said photographing mode display construction at said first display means is arranged so as to be able to display a portion of a plurality of photographing modes which can be selected, and said photographing mode display construction at said second display means is arranged so as to be able to display all of the plurality of modes which can be selected.

10. A display device for a camera, comprising:

(a) an external display arrangement for displaying an exposure information setting value;

(b) a view finder display arrangement for displaying a computed exposure value;

(c) photographic information computing means;

(d) first driving means for displaying a signal produced from said photographing information computing means by said means of said view finder display arrangement;

(e) an exposure information setting means;

(f) second driving means for displaying a signal produced from said exposure information setting means by means of said external display arrangement;

(g) photographing mode selecting means being able to select a plurality of photographing modes including an actual aperture preference mode; and

(h) third driving means for forcibly supplying a display signal formed at said photographic information computing means at said external display arrangement when said actual aperture preference mode is selected by said photographing mode selecting means.

11. A display device for a camera, comprising:

(a) a circuit substrate having a plurality of illuminating light emitting elements and a segment light emitting element construction which can display numerals mounted on the same surface thereof;

(b) a light shield plate which is positioned superposedly over said circuit substrate and has light passing holes formed at positions of said substrate to correspond to said illuminating light emitting elements and said segment light emitting element constructions;

; and

(c) display means having photographing information marks provided at positions corresponding to said illuminating light emitting elements.

12. A display device for a camera, comprising:

(a) display means having a plurality of figures for display, said display means including;

(1) the lowest figure being arranged to display "0" only;

(2) the highest figure being arranged to dispaly "1" only; and

(3) the other figures having a variable numeral segment construction; and

(b) mark constructions for displaying decimal points being positioned between said figures.