JPH0895147A - Display device - Google Patents

Abstract

PURPOSE: To obtain a display device capable of displaying a lot of information and high in visibility by making a scale plate constituted of a variable display part capable of changing the contents of a display. CONSTITUTION: The scale plate 72 is composed of a semitransmission positive liquid crystal element and two scales 721 and 722 can be displayed on the scale plate 72. The left scale 721 displays distance information and four numerical indexes 721a-721d, an index 721e for indicating ∞ (infinity) and index 721f and 721g for indicating that the distance information is displayed in a meter and a foot respectively are added. The right scale 722 is for displaying information relating to an exposure and five numerical indexes 722a-722e are added. Then, the variable display part is constituted of the whole of such a scale plate 72. However, a liquid crystal display element, etc., may be provided only on a part of the scale plate 72. Moreover, indicators 77a and 77b way be constituted as the liquid crystal display element.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary pointer type camera display device.

[0002]

2. Description of the Related Art A display device for displaying photographing information in an analog manner by a rotary pointer is disclosed in, for example, Japanese Patent Laid-Open No. 5-333418.
It is disclosed in Japanese Patent Publication No.

[0003]

Since the display device using the pointer displays various kinds of information as analog quantities, the information can be read quickly. However, when a large number of information is displayed at the same time by the pointer, the pointer, the scale, and the number of symbols symbolizing the displayed information increase, and the display device becomes large. A method has also been used in which a plurality of index columns are provided on the display device and one indicator indicates different information depending on the situation. However, this method has a problem that it is difficult to know which value should be read according to the situation and the display device becomes complicated.

It is an object of the present invention to provide a display device which can display more information and has high visibility in a display device which displays information in an analog manner by using a rotary pointer.

[0005]

1 and 2 showing an embodiment, the invention according to claim 1 is a display device 7 for displaying information by means of a scale plate 72 and pointers 77a, 77b. Applied to. Then, the above-mentioned object is achieved by the scale plate 72 being constituted by the variable display portion 72 whose display content can be changed. The invention of claim 2 is applied to the display device 7 of claim 1, and the variable display portion 72 is configured by a liquid crystal display element. The invention of claim 3 is the same as claim 2
It is applied to the display device 7 described and the liquid crystal display element 72 is a semi-transmissive type. The invention according to claim 4 is applied to the display device 7 according to claim 3, and the semi-transmissive liquid crystal display element 72 has a backlight 73 on its back surface. The invention according to claim 5 is applied to the display device 7 according to claim 1, and the variable display section 72 displays the photographing information of the camera. The invention of claim 6 is the invention of claim 5
Applied to the described display device 7, the shooting information of the camera is the aperture value of the lens. The invention of claim 7 is applied to the display device 7 according to claim 5, and the shooting information of the camera is a shutter speed. The invention of claim 8 is applied to the display device 7 of claim 5, and the variable display section 72 selects and displays either the aperture value of the lens or the shutter speed. The invention according to claim 9 is applied to the display device 7 according to claim 5, and the shooting information of the camera is a shooting distance. The invention according to claim 10 is applied to the display device 7 according to claim 5, and the shooting information of the camera is a shooting distance expressed in meters. Claim 11
The present invention is applied to the display device 7 according to the fifth aspect, and the shooting information of the camera is a shooting distance expressed in feet. The invention of claim 12 is applied to the display device 7 according to claim 5, and the variable display section 72 selects and displays one of the shooting distance expressed in units of meters and feet. The invention of claim 13 is applied to the display device 7 according to claim 1, and the variable display portion 72 displays a display value and a symbol indicating a unit of the display value. The invention of claim 14 is applied to the display device 7 according to claim 13, and when the display contents are switched, the variable display section 72 simultaneously switches the display value and the unit of the display value corresponding thereto. The invention of claim 15 is based on the scale 7.
It is applied to a device provided with a display means 7 for displaying information by 21, 722 and pointers 77a, 77b, and when the device is in an inactive state, at least a part of the scales 721, 722 is erased.

[0006]

In the invention of claim 1, the variable display section 72 allows
You can selectively display only the information you need. According to the second aspect of the invention, the display content can be easily changed by the liquid crystal display element 72. According to the invention of claim 3, when the external light is present by the semi-transmissive liquid crystal display element, it is visible by reflected light, and when the external light is small, it is visible by the backlight. In the invention of claim 4, the translucent liquid crystal display element 7 is provided by the backlight 73.
2 can be illuminated from the back. According to the invention of claim 5, the variable display section 72 displays the photographing information of the camera. Claim 6
In the invention described above, the variable display unit 72 displays the aperture value of the lens. According to the invention of claim 7, by the variable display section 72,
The shutter speed is displayed. In the invention of claim 8, the variable display section 72 selects and displays either the aperture value of the lens or the shutter speed. According to the invention of claim 9, the variable display section 72 displays the photographing distance of the camera. In the invention of claim 10, the variable display section 72 displays the photographing distance of the camera in units of meters. In the invention of claim 11, the variable display portion 72
Displays the shooting distance of the camera in feet. According to the twelfth aspect of the present invention, the variable display section 72 selects and displays one of the shooting distance expressed in units of meters and feet. In the thirteenth aspect of the invention, the variable display section 72 displays the display value and a symbol indicating the unit of the display value. According to the fourteenth aspect of the invention, when the variable display section 72 switches the display contents, the display value and the unit of the display value corresponding thereto are simultaneously switched. According to the fifteenth aspect of the present invention, the display means 7 erases at least a part of the display of the scale 72 when the device is in the non-operating state.

Incidentally, in the section of means and action for solving the above problems for explaining the constitution of the present invention, the drawings of the embodiments are used for making the present invention easy to understand. It is not limited to.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 3 is a top view of the camera of the embodiment of the present invention. In the figure, reference numeral 1 is a camera body, and a taking lens barrel 2 is provided on the front surface thereof. A release button 3, a mode selector 4, a command dial 5, a switch 6 and a display device 7 are provided on the upper surface of the camera body 1. The mode selector 4 switches between three modes of OFF (power OFF), A (aperture priority automatic exposure mode, hereinafter A mode) and T (shutter speed priority automatic exposure mode, hereinafter T mode).
It is rotated around the release button 3. OFF turns off the operation of the camera. The A mode is a mode in which the photographer sets the aperture value of the camera, and the T mode is a mode in which the photographer sets the shutter speed of the camera. The command dial 5 is rotated clockwise and counterclockwise to set the aperture value and shutter speed. This command dial 5 is designed to stop every time it rotates 22.5 degrees. The switch 6 is a distance unit changeover switch, and is operated to select whether to display the distance information of the display device 7 in units of meters or feet. The display device 7 displays various types of shooting information in a pointer manner.

As shown in FIGS. 1 and 2, the display device 7
Is an outer frame 70, a protective glass 71 fitted on the upper surface of the outer frame 70, a scale plate 72 mounted in the outer frame 70,
The backlight 73 and the support plate 74 are provided. The scale plate 72 is made of an anti-transmission type positive liquid crystal element. As shown in FIG. 1, two scales 721 and 722 can be displayed on the scale plate 72. The scale 721 on the left side displays distance information, and four numerical indicators 721a to 721d, an index 721e indicating ∞ (infinity), an index 721f indicating that the distance information is displayed in meters, and a distance. 721g indicating that the information is displayed in feet is attached. The scale 722 on the right side displays information about the exposure, and has five numerical indicators 722a to 722.
e is attached.

The backlight 73 is composed of an electroluminescence element (hereinafter referred to as an EL element) and illuminates the scale plate 72 from its lower surface side. Stepping motors 75a and 75b are fixed to the support plate 74. The output shaft of the stepping motor 75a is connected to the shaft 76a.
Is connected to the pointer 77a through the support plate 74, the backlight 73 and the scale plate 72. Similarly, the output shaft of the stepping motor 75b is connected to a shaft 76b, which supports the support plate 74, the backlight 73, and the scale plate 7.
It penetrates 2 and is connected to the pointer 77b.

FIG. 4 is a view showing the arrangement of the control system of the camera of this embodiment. It should be noted that parts not related to the present invention are omitted from this configuration diagram. The control device 10 is composed of a microcomputer and its peripheral parts, executes various arithmetic operations and control programs of the camera, and controls the display contents of the display device 7. The mode selector 4, the command dial 5, and the switch 6 described above are connected to the control device 10. Mode selector 4 to control device 1
A signal indicating which of OFF, A mode and T mode is selected is transmitted to 0. From the command dial 5, the rotation amount and the rotation direction of the command dial 5 are transmitted to the control device 10. A signal indicating whether the ft side or the m side is selected is transmitted from the switch 6 to the control device 10. Further, the control device 10 is pressed in two steps of a half-pressing operation and a full-pressing operation, and detects a release button 3 for transmitting a signal corresponding to each pressing operation to the control device 10 and a shooting distance (subject distance). An exposure control device 12 including a distance measuring device 11, a shutter mechanism portion 12a for driving a camera shutter, and a diaphragm mechanism portion 12b for driving a diaphragm, a stepping motor 75a,
Pointer drive device 13a for driving and controlling 75b and scale plate 72
LCD drive device 13b and backlight 73 for driving and controlling
A display driving device 13 including a backlight driving device 13c for driving and controlling the lens, and a lens driving device 1 for driving the taking lens barrel 2 in accordance with a command signal from the control device 10.
4 are connected.

The operation of the display device 7 will be described below together with the operation of each part of the camera. When the switch 6 is switched to the meter unit side (m side), the control device 10 operates as shown in FIG.
As shown in FIG.
a to 721d are numerical values in meters, and the index 72
Erase 1g. Switch 6 is in feet (ft)
6), the control device 10 causes the numerical indicators 721a to 721a of the scale 721 of the display device 7 to be displayed.
721d is a numerical value in feet and index 721f
Erase. When the release button 3 is pressed halfway in the above state, the control device 10 causes the distance measuring device 11 to start detection of the shooting distance, and rotates the pointer 77a to the position on the scale 721 corresponding to the detection result. It should be noted that when the mode selector 4 is operated to the A position, the backlight 73 is turned on through the backlight driving device 13c until a predetermined time elapses. The lighting of the backlight 73 may be performed based on, for example, a half-press operation of the release button 3.

When the mode selector 4 is operated to the OFF position, the power of the camera is turned off and the camera is in the inoperative state. The display device 7 is in the all-off state except for the hands 77a and 77b, and clearly informs the photographer that the camera is in the off state.

When the mode selector 4 is operated to the A position, the camera enters the aperture priority automatic exposure mode. At this time, the control device 10 causes the numerical indicators 722a to 722e of the scale 722 of the display device 7 to display a numerical value indicating the aperture value, as shown in FIG. When the command dial 5 is operated in this state, the control device 10 changes the aperture value set in the aperture mechanism portion 12b of the exposure control device 12 according to the operation direction and the operation amount of the dial 5, and the pointer 77b. Is rotated to a position indicating the newly set aperture value.

When the mode selector 4 is operated to the T position, the camera enters the shutter speed priority automatic exposure mode. At this time, the control device 10 causes the numerical indicators 722a to 722e of the scale 722 of the display device 7 to display a numerical value indicating the shutter speed, as shown in FIG. When the command dial 5 is operated in this state, the control device 10 changes the shutter speed set in the shutter mechanism section 12a of the exposure control device 12 according to the operation direction and the operation amount of the dial 5, and the pointer 77b. Is rotated to a position indicating the newly set shutter speed.

In this embodiment, since the anti-transmissive positive liquid crystal element is used for the scale plate 72, when the backlight 73 is turned on, the scale, characters and pointers are shielded from light, and the display is highly visible even in the dark. Becomes Scale plate 72
A transparent liquid crystal element or a reflective liquid crystal element or a negative liquid crystal element can be used as the light source depending on the illumination conditions. Instead of a liquid crystal element, a display element such as an EL element or an LED may be used for the scale plate. Even when a plurality of scale plates having different contents are prepared and mechanically replaced and used, a mechanical moving mechanism is required, but the same effect can be obtained. The backlight can also be replaced with an EL element, and an LED, a lamp, a fluorescent tube, or the like can be used. In the above-described embodiment, the example in which the present invention is applied to the display device of the camera is shown, but the present invention is not limited to the display device of the camera, and can be applied to those having a similar display form.

In the configuration of the above embodiment, the scale plate 7
The whole 2 constitutes a variable display part. However, the scale plate 72
A liquid crystal display element or the like may be provided only in a part of the above. Further, the hands 77a and 77b may be configured as a liquid crystal display element.

[0018]

As described above, according to the inventions of claims 1 and 2, since the display contents are variable, it is not necessary to separately secure a display space for each type of information. Can be made compact. Moreover, since only the necessary information can be displayed, it is possible to avoid complication of the display content. Further, since it is not necessary to display a large amount of information on the display device at the same time, it becomes easy to recognize which value is currently being focused on. According to the inventions of claims 3 and 4,
By using a semi-transmissive positive liquid crystal element as a liquid crystal display element and using a backlight, a display device having high visibility even in the dark can be obtained. According to the fifth to twelfth aspects of the present invention, since the photographing information of the camera can be selected and displayed, it is possible to avoid downsizing of the display unit of the camera and complication of the display content. According to the inventions of claims 13 to 15, the display value and the symbol indicating the unit of the display value corresponding to the display value can be displayed simultaneously, so that it is easy to understand which value should be read according to the situation. Become.

[Brief description of drawings]

FIG. 1 is a diagram showing details of a display device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of the display device of FIG.

FIG. 3 is a top view of a camera to which the display device according to the embodiment of the invention is applied.

FIG. 4 is a diagram showing a control system of a camera to which the display device according to the embodiment of the present invention is applied.

FIG. 5 is a diagram showing the display device when the aperture priority automatic exposure mode is selected and the display of the shooting distance in meters is selected in the embodiment of the invention.

FIG. 6 is a diagram showing a display device when a shutter speed priority automatic exposure mode is selected and a display of a shooting distance in units of feet is selected in the embodiment of the invention.

[Explanation of symbols]

 1 Camera body 3 Release button 4 Mode selector 5 Command dial 6 Switch 7 Display device 11 Distance measuring device 12 Exposure control device 12a Shutter mechanism part 12b Aperture mechanism part 13 Display drive device 13a Pointer drive device 13b Liquid crystal drive device 13c Backlight drive device 72 Scale plate 721, 722 Scale 73 Backlight 75a, 75b Stepping motor 77a, 77b Pointer

Claims (15)

[Claims] 1. A display device for displaying information by means of a scale plate and a pointer, wherein the scale plate is provided with a variable display section capable of changing display contents. 2. The display device according to claim 1, wherein the variable display section is composed of a liquid crystal display element. 3. The display device according to claim 2, wherein the liquid crystal display element is a transflective type. 4. The display device according to claim 3, wherein the semi-transmissive liquid crystal display element has a backlight on a back surface thereof. 5. The display device according to claim 1, wherein the variable display section displays shooting information of a camera. 6. The display device according to claim 5, wherein the shooting information of the camera is an aperture value of a lens. 7. The display device according to claim 5, wherein the shooting information of the camera is a shutter speed. 8. The display device according to claim 5, wherein the variable display unit selects and displays one of a lens aperture value and a shutter speed. 9. The display device according to claim 5, wherein the shooting information of the camera is a shooting distance. 10. The display device according to claim 5, wherein the shooting information of the camera is a shooting distance expressed in units of meters. 11. The display device according to claim 5, wherein the shooting information of the camera is a shooting distance expressed in feet. 12. The display device according to claim 5, wherein the variable display unit selects and displays one of a shooting distance expressed in meters and feet. 13. The display device according to claim 1, wherein the variable display section displays a display value and a symbol indicating a unit of the display value. 14. The display device according to claim 13, wherein the variable display unit simultaneously switches the display value and a unit of the display value corresponding thereto when switching display contents. 15. A device comprising display means for displaying information by means of a scale and a pointer, wherein at least a part of the display of the scale is erased when the device is in a non-operating state. apparatus.