JPH086138A - Finder display device - Google Patents

Abstract

PURPOSE:To obtain a large easy-to-see picture, to make various kinds of information easy to see in a finder and further, a set image range accurate and to reduce the number of control lines for a display. CONSTITUTION:The finder display device is provided with a first display means 5 shielding a part, of the finder from light to change the image range, second display means 6, 7a-7c and 8a-8e displaying at least a bit of information in the set image range, first display control driving means 19 and 20 driving the first display means 5 and second display control driving means 22 and 23 driving the second display means 6-8 and attaining drive different from the first display control driving means 19 and 20, various kinds of information are displayed in the image range and simultaneously the driving systems of the first and second display means 5 and 6-8 are changed to increase the contrast of a part for showing the image range.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a finder display device which is used in, for example, a camera and which displays in the finder and can confirm a photographing range.

[0002]

2. Description of the Related Art Conventionally, a display device for displaying a distance measuring mark indicating a distance measuring area, a field correction mark for photographing a short distance, etc. is generally known in a finder or the like for confirming a subject and a photographing range.

In addition to the external display of the camera, there is also known a display device in which various kinds of photographing information and time information are displayed in the finder so that the photographer can see the information while confirming the subject. There is.

Further, recently, there are known cameras capable of switching to different sized photographing screens such as a normal photographing mode or a panoramic photographing mode.

In these cameras, Japanese Patent Laid-Open No. 3-85
As disclosed in Japanese Patent No. 538, a technique has been proposed in which such information is displayed on a liquid crystal display, and in the viewfinder, the material and display method of each display within the shooting range and outside the shooting range are changed. There is.

[0006]

However, it is desirable that the viewfinder representing the subject and the photographing range is originally easy to see, and for that purpose, it is desirable to increase the angle of view. Therefore, if the display is placed outside the shooting range in the viewfinder,
There was a problem that the photographable range became smaller accordingly.

Further, it is easier to use various information in the finder than to look at the external display one by one from the finder, but the liquid crystal display is used to change the photographing range (screen size). (A part of the viewfinder is masked by display), the display body is controlled by the same display method in order to obtain a high display of the contrast of these various information and the masked part (shielded part). Therefore, the number of control lines becomes very large, and the space or the mounting becomes large, and the cost becomes high. Conversely, if you try to reduce the number of control lines,
There is a problem that the contrast becomes low and the light-shielding portion and these information displays cannot be clearly seen.

(Object of the Invention) An object of the present invention is to make a large finder which is easy to see, makes it easy to see various information in the finder, and can clarify the image range to be determined, and It is an object of the present invention to provide a finder display device capable of reducing the number of control lines for display.

[0009]

In order to achieve the above object, the present invention according to claim 1 provides a first display means for changing the image range by shielding a part of the viewfinder. Second display means for displaying at least one information within the image range determined by the first display means, first display control drive means for driving the first display means, and second display means. The present invention according to claim 4 further comprises: a second display control driving means for driving the first display control driving means different from the first display control driving means. First display means for changing the range,
A second display unit configured to display at least one piece of information within the image range determined by the first display unit and having a configuration different from that of the first display unit, and driving the first display unit. A first display control drive means and a second display control drive means for driving the second display means,
Various kinds of information are displayed within the image range, and the driving method of the first display means and the second display means is changed, or the configuration of each display means is changed so that the portion showing the image range is changed. I try to increase the contrast.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the illustrated embodiments.

FIG. 1 is a block diagram showing a main part of a finder display device according to a first embodiment of the present invention. In FIG. 1, 3 is a finder frame and 4 is a liquid crystal installed so as to cover the finder frame 3. A display body, 1 is a display control drive means for controlling display of a part of the liquid crystal display body 4, and 2 is a display control drive means for controlling display of the remaining part of the liquid crystal display body 4. Reference numeral 5 denotes a finder light-shielding portion for displaying a photographing range (a panoramic screen size in the embodiment) different from the standard photographing range, and this part is controlled by the display control driving means 1. Reference numeral 6 denotes a date display portion (note that the display position and the size thereof are different depending on the change of the photographing range from FIGS. 2 and 3 described later), 7a, 7b, 7
c is a distance measuring point mark, and 8a to 8e are marks indicating each setting mode, and these are controlled by the display control driving means 2.

FIG. 2 is a block diagram showing an outline of a camera including the above display device.

In FIG. 2, the CPU 9 inputs the state of the panorama switch 11, and when it is ON, it outputs a display ON signal to the LCD control circuit 19 in order to form a panorama shooting range, and the contrast of the display body is changed. In order to improve the raising light-shielding property, the STATIC driving unit 20 drives the finder light-shielding portion 5 of the TN type LCD. Also, panorama switch 11
When is OFF, a display OFF signal is output to the LCD control circuit 19 in order to form a normal shooting range, and ST
The finder light-shielding portion 5 of the TN LCD is made transparent by the ATIC drive unit 20.

As is clear from the above, the LCD control circuit 19 and the STATIC drive section 20 constitute the display control drive means 1 of FIG.

The CPU 9 also inputs the state of the photographing mode selection switch 16 as a photographing mode selection signal processed by the photographing mode selection circuit 15, and when imprinting the date, inputs the date signal from the date circuit 18, The display ON signal is output to the LCD control circuit 22, and the 1/3 DUTY DYNAMIC drive unit 23 drives the date display unit 6 of the TN type LCD.

The CPU 9 also inputs the state of the photographing mode selection switch 16 as a photographing mode selection signal processed by the photographing mode selection circuit 15 and outputs a display signal corresponding to the photographing mode signal to the LCD control circuit 22. / 3 DUTY DYN
The AMIC drive unit 23 drives the red-eye reduction lamp lighting mark 8b, macro photography mark 8d, etc. of the TN type LCD.

Further, the CPU 9 inputs a strobe charge signal from the strobe circuit 17 at the time of strobe charging, and the LCD
Outputs the charge display signal to the control circuit 22 and outputs 1/3 DUTY DYNAM
The IC drive unit 23 drives the strobe light emission prohibition mark 8a of the TN type LCD.

Further, when the switch 10 is turned on, the CPU 9 inputs the distance signal processed by the distance measuring circuit 12 and the subject brightness signal processed by the photometric circuit 13, and the LCD control circuit 22.
If the subject brightness is low and camera shake is likely to occur, a low-brightness camera shake warning will be output, and if there are multiple range sensors, display signals of the distance measuring points used will be output, and the 1/3 DUTY DYNAMIC drive unit 23
Drive the low-brightness image-shake warning mark 8c and the distance measuring point marks 7a to 7c of the TN LCD.

As described above, the display of the date display portion 6, the distance measuring point marks 7a to 7c and the marks 8a to 8e indicating the respective setting modes are performed by the 1/3 DUTY DYNAMIC drive (the applied voltage of 1/3). STA of the viewfinder light-shielding part 5
The number of control signals can be reduced as compared with the case where TIC driving is performed.

Further, since these displays are made within the photographing range, the viewfinder screen can be enlarged, and it is not necessary to look away from the viewfinder and look at the external display.

In order to drive the liquid crystal display 4, the drive power source 21 and the drive power source 2 which change the voltage according to the temperature characteristics.
4 is used, the contrast deterioration due to temperature is improved.

FIG. 3 is a diagram showing a display state on the liquid crystal display body when the viewfinder light-shielding portion 5 is not displayed, that is, when the normal photographing range is shown.

When the panorama switch 11 is normally OFF, the viewfinder light-shielding portion 5 is not displayed, and FIG.
The date display at the position of is displayed at the position shown in Fig. 3,
Further, the size of the character is also increased in response to the wider shooting range.

(Second Embodiment) FIG. 4 is a block diagram of a finder display device according to a second embodiment of the present invention.
The same parts as those in the embodiment of FIG.

In FIG. 4, the CPU 9 inputs the state of the panorama switch 11, and when it is ON, it outputs a display signal to the LCD control circuit 19 to show the photographing range during panorama, and raises the contrast of the display body to shield light. In order to improve the property, the PDLCorGH driving unit 20a is used to shield the viewfinder from light.
Drive. That is, the driving direction is different in the first embodiment, but here, the type of the display body that displays the finder light-shielding portion 5 is (what is the display body that displays various information).
It is supposed to be different.

Here, PDLC is "Polymer Dispersed".
Since it is an abbreviation for "Liquid Crystal" and is a light dispersion type, the finder display has a high transmittance when OFF, is easy to see (bright), and has excellent light-shielding properties when ON. GH is a guest
It is a host liquid crystal display, and has a high transmittance and a bright viewfinder. Since these drive devices have different drive voltages, different drive circuits are required.

The CPU 9 inputs the state of the photographing mode selection switch 16 as a photographing mode selection signal processed by the photographing mode selection circuit 15, and when the date is imprinted, the date signal is inputted from the date circuit 18 to control the LCD. Circuit 22
Output the display signal to the 1/3 DUTY DYNAMIC drive unit 23
The date display 6 of the N-type LCD is driven.

Further, the CPU 9 inputs the state of the photographing mode selection switch 16 as a photographing mode selection signal processed by the photographing mode selection circuit 15 and outputs a display signal corresponding to the photographing mode signal to the LCD control circuit 22. / 3 DUTY DYN
The AMIC drive unit 23 drives the red-eye reduction lamp lighting mark 8b, macro photography mark 8d, etc. of the TN type LCD.

Further, the CPU 9 inputs a strobe charge signal from the strobe circuit 17 at the time of strobe charging, and the LCD
Outputs the charge display signal to the control circuit 22 and outputs 1/3 DUTY DYNAM
The IC drive unit 23 drives the strobe light emission prohibition mark 8a of the TN type LCD.

Further, when the switch 10 is turned on, the CPU 9 inputs the distance signal processed by the distance measuring circuit 12 and the subject brightness signal processed by the photometric circuit 13, and the LCD control circuit 22.
When the subject brightness is low and camera shake is likely to occur, a low-brightness camera shake warning is output, and when there are multiple distance measuring sensors, the display signals such as the distance measuring points used are output, and the 1/3 DUTY DYNAMIC drive unit 23 drives the TN type LCD. The low-brightness camera shake warning mark 8c, the distance measuring point mark 7 and the like are driven.

As described above, also in this embodiment, the display of the date display portion 6, the distance measuring point marks 7a to 7c and the marks 8a to 8e showing the respective setting modes are driven by the 1/3 DUTY DYNAMIC drive (1
Since the voltage is applied by the applied voltage of / 3), the number of control lines can be reduced as compared with the case where the STATIC driving of the finder light shielding portion 5 is performed. Further, since the finder light-shielding portion 5 is driven by PDL driving or GH driving, the photographing range can be more clearly specified.

Further, since the various information described above is carried out within the photographing range, it is possible to enlarge the viewfinder screen, and it is not necessary to look away from the viewfinder one by one to see the external display.

In driving the liquid crystal display body 4, the drive power source 21 and the drive power source 2 which change the voltage according to the temperature characteristics.
Since No. 4 is used, the deterioration of contrast due to temperature is improved.

According to each of the above embodiments, since the display body which has been arranged in the photographing range in the finder is arranged in the finder, the finder screen itself can be enlarged without increasing the cost. it can.

Further, since various kinds of information are intensively displayed on the finder screen, the information can be easily recognized without having to take a look at the finder one by one, which is convenient.

Further, since the liquid crystal display body 4 is driven by the display control driving means having different driving methods, it becomes possible to drive more display bodies with a small number of control lines.
It is possible to reduce the mounting and space requirements.

Furthermore, since the finder light-shielding portion 5 that determines the photographing range has a high contrast, it is possible to make the display in the finder easy to see during a panorama.

(Modification) The present invention can be applied to any camera such as a single-lens reflex camera, a lens shutter camera, and a video camera.

Further, the present invention is not limited to a camera, and can be similarly applied to any image device having a finder for confirming other images.

Further, the present invention may be constructed by appropriately combining the above-described embodiments or their techniques.

[0041]

As described above, according to the present invention,
Various kinds of information are displayed within the image range, and the driving method of the first display means and the second display means is changed, or the configuration of each display means is changed so that the portion showing the image range is changed. I try to increase the contrast.

Therefore, it is possible to make the viewfinder large and easy to see, to make it easy to see various information in the viewfinder, to clarify the image range to be determined, and to reduce the number of control lines for display. Can be reduced.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a main part of a display device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing an outline of a camera including the display device of FIG.

FIG. 3 is a diagram showing how a finder display is displayed during normal shooting according to the first embodiment of the present invention.

FIG. 4 is a block diagram showing an outline of a camera including a display device according to a second embodiment of the present invention.

[Explanation of symbols]

 1, 2 Display control drive means 4 Liquid crystal display 5 Finder light-shielding portion 6 Date display 7a to 7c Distance measuring point marks 8a to 8e Marks indicating each setting mode 9 CPU 19 LCD control circuit 20 STATIC drive 20a PDLCorGH drive 22 LCD control circuit 23 1/3 DUTY DYNAMIC driver

Claims (5)

[Claims] 1. A first display means for changing the image range by shielding a part of the viewfinder, and a second display means for displaying at least one information within the image range determined by the first display means. Display means, first display control driving means for driving the first display means, and second display for driving the second display means, which is driven differently from the first display control driving means A finder display device including a control drive means. 2. The first display control drive means includes means for driving the first display means so that the first display means is in a display state with a higher contrast than the display on the second display means. And finder display device. 3. The finder display device according to claim 1, wherein the first display means and the second display means have the same configuration. 4. A first display means for changing the image range by shielding a part of the viewfinder, and at least one piece of information for displaying at least one information within the image range determined by the first display means. Second display means having a configuration different from that of the first display means, first display control drive means for driving the first display means, and second display control drive for driving the second display means. And a viewfinder display device. 5. The finder display device according to claim 3, wherein the first display means is a means for performing a display having a higher contrast than the display by the second display means.