JPH03253833A - Display illumination device for camera - Google Patents

Abstract

PURPOSE:To obtain enough space for elements by providing two light sources whose colors are different as the illumination light source of a display part. CONSTITUTION:On an LED substrate 7, many sets of light emitting elements are provided by setting two LEDs 7A and 7B whose colors are different as a set of light emitting elements. That means, light from the LEDs 7A and 7B does not become the perfect collimated beam of light. However, by arranging a diffusing sheet 6A behind a lens 6B, the light is diffused so that the covering area of the lens 6B of an LCD 5 is uniformly illuminated by the illumination light emitted from two LEDs 7A and 7B as the uniform illumination light. Then, the element 7A is made to emit the light at a flash photographing mode time and the element 7B is made to emit the light at an ordinary photographing mode time. Thus, more than enough space is obtained for the display part in the LCD.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a display illumination device for display in a finder of a camera, etc.

(Prior Art) In recent years, many cameras have built-in mechanisms that automatically fire flashes in response to the brightness of the subject. For this reason, it has become necessary to have a mechanism for communicating to the photographer that the camera is in flash photography mode.

Conventionally, the method of informing the photographer that the flash shooting mode is on is to display a display mark on the LCD in the viewfinder, but since there is a lot of information to be displayed on the LCD, the display mark is under pressure to minimize it as much as possible. In some cases, the charging completion mark (full charge mark) and flash shooting mode mark (flash mark) are also used, but in this case, even in flash shooting mode, if charging is not completed, the release switch will go down. Although no pictures were taken because there was no camera, there was a problem in that it could be mistaken for a camera malfunction.

(Problems to be Solved by the Invention) An object of the present invention is to identify the type of shooting mode without using a separate display mark.

(Means for Solving the Problems) A plurality of illumination light sources emitting light of different colors are provided as illumination light for the display section, and the plurality of illumination light sources are switched in conjunction with switching of the photographing mode.

(Function) In the present invention, two light sources with different colors are provided as illumination light sources such as an LCD. If the display element is not self-luminous, the color of the display changes depending on the color of the illumination light.

The two photographing modes can be distinguished by the color of the LCD illumination light. That is, various pieces of information are displayed in different display patterns, and the shooting mode is identified by the color of the entire display. This eliminates the need for mode display patterns such as flash marks, and frees up display space on the LCD.

(Embodiment) FIG. 1 shows the configuration of an embodiment of the present invention. In FIG. 1, A is a control section, which is a circuit that performs camera sequence control, exposure control 1 display control, calculation, etc. B is DC/DC
A converter converts the DC power supply G into an appropriate voltage and supplies it to each part. C is a photometry unit that measures the brightness of the subject. D is a display section that displays photographing information. E is a light emitting part, which has two light emitting parts A and B of different colors. F is a flash section, which causes the flash tube to emit light when the brightness of the subject is low.

Although an LCD is used in the display section, since the LCD itself does not emit light, it is necessary to illuminate it with a light emitting element such as an LED or El- from the opposite side of the viewing direction of the LCD. The present invention uses two-color light emitting parts A and B for this illumination, and attempts to distinguish between different shooting modes by the color of the illumination light. Fig. 2 shows a cross-sectional view of the camera's infinder. . 1 is a pentaprism, 2 is an eyepiece, 3
4 is a focusing plate, 4 is a light guide that makes the display light enter the pentaprism 1, 5 is an LCD display element, and as shown in FIG. 4A, there is a charging completion mark J and a shutter speed SS.
, aperture value FNn, etc. are displayed. 6 is an illumination optical system, and 7 is an L E with a two-color light emitting section (Fig. 1 A, B).
This is a D board.

FIG. 3 shows a detailed diagram for explaining the illumination method using two-color light emitting elements. There are two different colors on the LED board 7.
The LEDs 7A and 7B constitute a set of light emitting elements, and many sets of light emitting elements are provided.
A lens plate 6 composed of a lens group to which two lenses correspond.
B is placed in the front. In each set of light emitting elements and one lens facing it, point A is the front lens 6.
This is the focal position of point B, and the light from the light emitting element at point A is arranged so that it becomes a parallel beam of light at lens 6B.
Although the light from the EDs 7A and 7B will not be a completely parallel beam, by placing the diffusion sheet 6A behind the lens 6B, the light will be diffused and the two LEs
The illumination light emitted from D7A and 7B serves as uniform illumination light to uniformly illuminate the area covered by the lens 6B of the LCD 5. In the flash photography mode, the light emitting element 7A emits light, resulting in a display as shown in FIG. 4C; in the normal photography mode, the light emitting element 7B emits light, resulting in a display as shown in FIG. 4B.

Here, the diagonal lines in the figure indicate that the color is different from the color of the display section in FIG. 4C. FIG. 5 shows the example of FIG. 4 in which a flash mark F is also used.

FIG. 6 shows a flowchart of control operations related to display in the control section. Check whether the photometry switch S1 is on (#OO), and if it is confirmed that the photometry switch S1 is on, activate the DC/DC converter B (#1.0>.DC/DC converter B teeth,
A DC voltage from the battery power source G is supplied to various locations according to a control signal from the control section A. When the DC/DC converter B has stabilized, the photometer C measures the light from the subject,
Send photometric data to control unit A (#20>.Control unit A
performs exposure calculation based on the above photometric data (#30)
, it is determined whether it is necessary to take a picture in flash photography mode (#40). If it is determined that it is necessary to take a picture in the flash photography mode, it communicates with the flash unit F and exchanges signals such as charging completion, flash information such as the irradiation angle position, and exposure information such as the aperture (#5
0).

The control unit A causes the light emitting unit A (LED 7A in FIG. 3) to emit light (#60). Determine whether charging is complete (
#63). If charging is not completed, return to operation #50, and if charging is completed, the shutter speed (SS) for flash firing and the corresponding aperture value (F Nn
, ) are calculated and set (#65). If it is determined that there is no need to take a picture in the flash photography mode, the control unit A causes the light emitting unit B (LED7B in FIG. 3) to emit light (#70). SS and FN[L are calculated and set. (#75).The control value based on the set SS, FNo., and value is output to the display section and displayed on the LCD 5.

In flash photography mode, if charging is complete, the fully charged mark J will be displayed (see Figure 4) (#80). Press S again.
1 is on (#90), and if it is on, the process proceeds to shooting sequence control, where AF operation, exposure control, etc. are performed. If it is off, stop the DC/DC converter operation #100> and return to operation #00.

In the above embodiment, the completion of charging was indicated on the display section in operation #80 by a charging completion mark J, and the flash photography mode was identified by the color of the illumination light, but as shown in FIG. , when in flash shooting mode,
If you also display flash mark F,
You can now confirm the flash shooting mode more accurately.

In the solid line example above, a display element that is not self-luminous is used, but even if the display element is self-luminous or uses external light as the illumination light source, the background part of the display pattern may be colored in a different color. By illuminating it, it is of course possible to identify the photographing mode by the color of the entire display surface.

In addition, in the above embodiment, a mark indicating the flash shooting mode is also used in the flash shooting mode to distinguish between the flash shooting mode and the normal shooting mode, but it is possible to distinguish between both modes even without this mark. Needless to say. In this way, by using a mark indicating the mode in combination with one of the plurality of modes, identification can be made more reliable than simple identification by color.

Further, in the above embodiment, the mode is automatically switched based on the photometry result, but the mode may be switched manually.

(Effects of the Invention) According to the present invention, by distinguishing between the flash photography mode and the normal photography mode by the color of the illumination light, L
There is now more space available for displaying on CDs. Also, by using it as a flash mark, identification of flash photography mode P becomes more reliable, and confirmation of photography information becomes more reliable.

[Brief explanation of drawings]

Fig. 1 is an elliptical diagram of one embodiment of the present invention, Fig. 2 is a sectional view of the finder of the above embodiment, Fig. 3 is a detailed view of the display section of the above embodiment, and Fig. 4 is a diagram of the above embodiment. FIG. 5 is a diagram showing an example of the arrangement of displays in the finder, FIG. 5 is another example of the arrangement, and FIG. 6 is a flowchart of the control section of the above embodiment. A...Control unit, B...D C/DC converter, C...Photometering unit, D...Display unit, E...Light emitting unit,
F...Flash unit, Sl...switch, G...
DC power supply.

Claims (1)

[Claims] A display illumination for a camera, characterized in that a plurality of illumination light sources emitting light of different colors are provided as illumination light for a display section, and the plurality of illumination light sources are switched in conjunction with switching of a plurality of shooting modes. Device.