Camera capable of programmed exposure control

• US 4,455,068 A
• Filed: 12/11/1981
• Issued: 06/19/1984
• Est. Priority Date: 12/11/1980
• Status: Expired due to Term

• Current Assignee: Minolta Camera Kabushiki Kaisha
• Original Assignee: Minolta Camera Kabushiki Kaisha
• Inventors: Izuhara, Koichi
• Primary Examiner(s): ADAMS JR, RUSSELL E
• Application Number:
  US06/329,748
• Time in Patent Office: 921 Days
• Field of Search: 354/23 D, 354/50, 354/60 R, 354/75, 354/76, 354/289, 352/141, 364/525
• US Class Current: 396/242
• CPC Class Codes: G03B 7/097 for control of both exposure time and aperture

Abstract

The present invention provides an optimum programmable camera that can be subjectively programmed to accomodate a user'"'"'s personal demand. The user can enter in various combinations of F-values and exposure times for implementation under different lighting conditions. A graphic display can be provided on the back of the camera to facilitate the subjective programming and storage of program lines. Thus, the user is capable of completely and subjectively determining the operation of the camera to meet his own individual demands.

Claims

1. A camera capable of programmed exposure control, in which a combination of the aperture size and the exposure time is automatically determined in a pre-programmed manner in response to the result of light measurement, comprising:

means for measuring light to produce a light measuring signal;

means for displaying a program to the user representing a relationship of a variety of possible values of the light measuring signal to various combinations of the aperture size and the exposure time, respectively;

means associated with the camera for optionally setting up a desired program by the operator, said setting means being capable of visually composing the desired program on the displaying means;

means for storing the set program; and

means for controlling the aperture size and the exposure time in response to the light measuring signal actually produced by the measuring means by consulting the stored program.

2. The invention of claim 1, wherein the displaying means is located on the back lid of the camera.

3. The invention of claim 1, wherein said storing means is capable of storing a plurality of kinds of programs, and wherein the camera further comprises means for selecting one of the stored programs for exposure control.

4. The invention of claim 3, wherein the displaying means is capable of visually indicating the selected program, whereby the displaying means is utilized both for visual composition of the desired program upon setting and for visual indication of the selected program.

5. The invention of claim 4, wherein the displaying means is located on the back lid of the camera.

6. The invention of claim 1, wherein the displaying means is further capable of visually indicating the stored program, whereby the displaying means is utilized both for visual composition of the desired program upon setting and for visual indication of the stored program after the completion of the program.

7. The invention of claim 6, wherein the displaying means is located on the back lid of the camera.

8. The invention of claim 1, wherein said setting means includes means for manually composing the program.

9. In an automatic camera having the capability of varying both aperture sizes and exposure times in response to measurement of ambient light from an object scene, the improvement comprising:

programming means for permitting an operator to subjectively and independently select a plurality of aperture sizes and related exposure times;

means for displaying the programmed range of selected aperture sizes and exposure times; and

means for storing the selected programmed range of aperture sizes and exposure times and implementing from said stored range one of the combination of aperture sizes and exposure times in response to the measurement of ambient light for taking a picture.

10. The invention of claim 9 further including means for selecting a previously stored programmed range of selected aperture sizes and exposure times.

11. The invention of claim 9 further including means for determining an erroneous entry into the programmed values and indicating such to the operator.

12. The invention of claim 9 further including a read only memory and a pre-stored program contained in the read only memory.

13. The invention of claim 9 wherein the displaying means includes a graphic representation of aperture sizes and exposure times.

14. The invention of claim 10 wherein the means for selecting a previously stored programmed range of selected aperture sizes and exposure times includes a program dial.

15. The invention of claim 10 wherein the means for selecting a previously stored programmed range of selected aperture sizes and exposure times includes program select buttons.

16. The invention of claim 9 wherein the automatic camera has a camera housing and the programming means includes program setting control members mounted on the exterior of the camera housing for varying the program by the camera operator.

17. A camera capable of programmed exposure control, in which a combination of the diaphragm aperture size and the exposure time is automatically determined in a pre-programmed manner in response to the result of light measurement, comprising:

means for measuring light from an object to be photographed and producing a light measurement signal as a function of the measured light;

means for displaying a program of exposure control which determines a combination of the diaphragm aperture size and the exposure time for each light measurement signal;

a manual member which is manually operable;

means for changing the program being displayed, in response to the manual operation of said manual member;

means for storing the data of the displayed program; and

means for controlling the diaphragm aperture size and the exposure time to values given for the light measurement signal in accordance with the stored program.

18. A camera capable of programmed exposure control, in which a combination of the diaphragm aperture size and the exposure time is automatically determined in a pre-programmed manner in response to the result of light measurement, comprising:

a camera housing;

means for measuring light from an object to be photographed and producing a light measurement signal as a function of the measured light;

means for displaying a program of exposure control which determines a combination of the diaphragm aperture size and the exposure time for each light measurement signal;

a manual member mounted on the exterior of the camera housing which is manually operable;

means for changing the program being displayed, in response to the manual operation of said manual member;

means for storing the data of the displayed program; and

means for controlling the diaphragm aperture size and the exposure time to values given for the light measurement signal in accordance with the stored program.