KR20000005050U - Camera operation status display device - Google Patents

Abstract

The camera's operation status display device consists of a release stage switch, a focusing unit, a metering unit, a strobe unit, and an operation control unit.The operation control unit operates the focusing unit and the metering unit when the release stage 1 switch is operated, Determines the amount of luminance, and when the determined luminance is in a low luminance state in which the strobe portion should be operated, outputs an image set to the liquid crystal display device according to whether or not the charging is completed according to the state of the signal output from the strobe portion, and the determined subject It outputs a signal that can change the operating state of the light emitting diode according to the distance to. As a result, the structure can be simplified to increase the degree of freedom of design, cost reduction can be realized, and the assembly time and the defect rate can be reduced by simplifying the assembly process of parts.

Description

Camera operation status display device

This invention relates to a camera, and more particularly, to an operation state display device of the camera.

Since the camera photographing the subject has a display device for displaying the photographing state of the camera, the user can determine the photographing state of the current camera so that a good photographing operation can be performed.

In general, a display device for displaying a shooting state of a camera includes a focusing light emitting diode (hereinafter referred to as an LED) indicating a focus adjustment state with a subject, and indicating whether the strobe device is charged during strobe shooting. Strobe LEDs, two LEDs were used to indicate the camera's focus and strobe charge status.

That is, if the focus control with the subject is normal or the charging operation of the strobe device is completed, the focus adjustment LED or the strobe LED is turned on. If the focus adjustment is not completed normally or the strobe charging operation is not completed, the focus adjustment LED or The strobe LED blinks for a set period. At this time, the focus control LED and the strobe LED used to change the color of the light emitted so that the user can be distinguished from the outside.

As such, when using two LEDs, the user can check whether the focus is adjusted and whether the strobe is charged.

On the contrary, when the photographing state of the camera is displayed by using one LED, when the focus adjustment with the subject is completed, one mounted LED is turned on to execute the next photographing operation.

If the distance to the subject is too close to allow normal shooting operation, the mounted LED blinks at a frequency of about 4 Hz to warn near shooting, and when the camera shake occurs, the frequency is about 8 Hz. The mounting LED flashes to allow the user to check the current shooting status.

As described above, when LEDs are attached to indicate the shooting status of the camera, two LEDs must be used to indicate both the focus adjustment status and whether the strobe device is charged. Therefore, an increase in cost occurs and a resistance to operate the LEDs. Etc., the camera structure becomes complicated, resulting in a decrease in design freedom. In addition, since a small device must be assembled, a lot of assembly time is required, and a problem arises in that the defective rate of the product is increased due to assembly failure.

In addition, when displaying the photographing state of the camera using one LED, there is a limit in the photographing information to be displayed, so the user cannot know whether the strobe is charged.

Since only two or one LED is used to display the camera's shooting status, if the user does not check the LED's operation status and executes the shooting operation of the subject, the focus adjustment is not made or the strobe device is not charged. As a result, an abnormal shooting operation such as a shooting operation with insufficient brightness is performed, and thus a problem in that a high quality photograph cannot be obtained and film is wasted is caused.

Therefore, the technical problem to be achieved by the present invention is to reduce the number of display devices displaying the shooting state of the camera to realize cost reduction and simplify the structure to improve the degree of freedom of design.

Another technical problem that the present invention intends to achieve is to display the shooting states of various cameras so that accurate shooting of a subject can be realized.

1 is a block diagram of an operation state display apparatus of a camera according to an embodiment of the present invention,

2 (a), 2 (b), and 2 (c) are flowcharts of operations of an operation control unit according to an embodiment of the present invention;

3 is a mounting state diagram of a light emitting diode and a liquid crystal display according to an exemplary embodiment of the present invention.

The configuration of the operation state display device of the present invention for solving this problem,

Focus adjusting means for outputting an electric signal corresponding to the distance to the subject;

Photometric means for outputting a corresponding electrical signal in accordance with the luminance state around the subject;

An imaging switch for outputting a drive signal for operating the focus adjusting means and the photometric means;

Flash means for emitting light for correcting the amount of luminance around the subject;

Image display means for displaying a corresponding image;

State display means for varying an operating state according to a state of an applied signal;

When the photographing switch is operated, the focus adjusting means and the metering means are operated to determine the distance from the subject and the amount of brightness, and when the determined brightness amount is a low brightness state in which the flash means should be operated, the state of the signal output from the flash means is determined. And an operation control means for outputting an image set to the image display means according to whether or not the charging is completed, and outputting a signal for changing an operation state of the state display means according to the determined distance to the subject. have.

Then, with reference to the accompanying drawings for the operation state display device of the camera according to an embodiment of the present invention the most preferred embodiment that can be easily implemented by those of ordinary skill in the art to which the present invention belongs Will be described in detail.

1 is a block diagram of an operation state display apparatus of a camera according to an embodiment of the present invention, Figures 2 (a) to 2 (c) is an operation flowchart of the operation control unit according to an embodiment of the present invention, Figure 3 A state diagram of mounting of a light emitting diode and a liquid crystal display device according to an embodiment of the present invention.

As shown in Figure 1, the structure of the operation state display device of the camera according to the embodiment of the present invention is as follows.

The focus adjusting unit 11 for measuring focusing distance from the subject and executing the focus adjustment, and the light metering unit 12 sensing the brightness around the subject are connected to the operation control unit 2 to transmit a corresponding electrical signal to the operation control unit. The strobe unit 13, which is output to (2) and operates to correct insufficient luminance, is also connected to the operation control unit 2 to transmit a signal having a state corresponding to the operation state of the strobe unit 14 to the operation control unit 2. Output In addition, the first and second release switches SW1 and SW2 which connect the motion control unit 2 to measure the distance to the subject, to execute the amount of surrounding luminance, and to output a signal for photographing the subject to photograph the subject. The signal corresponding to the operation state is output to the operation control unit 2.

At this time, the release first stage and second stage switches SW1 and SW2 are on / off switches that are manually operated according to a user's operation. The release first stage switch SW1 is a release two stage switch SW2 by manual operation. It works first.

The operation control unit 2 includes the following as shown.

The central processing unit (CPU) 21 which executes a control operation to the bus 26 is connected to perform a control operation, and the ROM 22 and the RAM 23 are connected to each other to control the central processing unit 21. Programs, data, or data generated during control are stored.

The input / output port 24 is connected to the bus 26 to perform input / output operations of data or control signals, and the A / D converter 25 is connected to input / output data to the operation controller 2. B convert the state of the signal to an available state.

The light emitting diode LED1 is connected to the operation control unit 2, and the liquid crystal display driving unit 31 and the liquid crystal display device 32 are connected to each other and according to the state of the signal output from the operation control unit 2. ) And the operating state of the liquid crystal display 32 change.

As shown in FIG. 3, since the light emitting diode LED1 and the liquid crystal display device 32 are mounted at the rear of the camera body 100, the camera user can quickly and accurately the light emitting diode LED1 and the liquid crystal display device 32. Recognize the operation state of the) to allow a normal shooting operation.

The operation of the operation state display device of the camera according to the embodiment of the present invention having such a structure will be described in detail with reference to FIGS. 2A, 2B, and 2C.

When the power required for the operation is supplied, the operation of each corresponding device is started and the operation of the operation control unit 2 is also started to perform the operation for displaying the operation state of the camera.

When the operation of the operation control unit 2 starts, the central processing unit 21 of the operation control unit 2 reads a signal input from the release first stage switch SW1 (S11), and the release first stage switch SW1 is It is determined whether the operation (S12). When the release first stage switch SW1 does not operate, the operation state of the release first stage switch SW1 is continuously determined, and when it is determined that the release first stage switch SW1 is operated, the operation control unit 2 The central processing unit 21 operates the focus adjusting unit 11 and the light metering unit 12, and uses the signals output from the focus adjusting unit 11 and the metering unit 12 to adjust the distance to the subject and the luminance of the surroundings. Measurement is made to determine the distance to the subject and the amount of brightness (S13 and S14).

Then, the central processing unit 21 of the operation control unit 2 determines whether the distance to the determined subject is a normal distance or more than a set distance at which the subject can be photographed normally (S15).

When the determined distance from the subject is a normal distance or more than the set distance, the CPU 21 of the operation controller 2 determines whether the determined luminance state is a low luminance state in which the strobe unit 13 should be operated. (S16).

In the normal luminance state without the operation of the strobe unit 13, the central processing unit 21 determines the operation state of the release two-stage switch SW2 and the shooting mode selected by another user, and the like to capture a normal subject. Control is executed (S17).

However, when the determined luminance state is a low luminance state requiring the light emission operation of the stroboscopic unit 13, the central processing unit 21 of the operation control unit 2 determines whether the determined luminance state is a state in which image stabilization control should be performed. It is determined (S18).

The camera shake control is generally intended to correct a problem caused by the shake of the user, which occurs as the shutter opening time becomes longer when the determined luminance amount EV is about 9.0 or less.

Therefore, when the determined luminance state is simply a low luminance state in which the strobe unit 13 should be operated, the central processing unit 21 outputs a corresponding control signal for the light emitting operation of the strobe unit 13, and then is input. The signal state is read to determine whether the charging operation of the stroboscopic unit 13 is completed (S19).

When the state of the strobe unit 13 is currently being charged, the central processing unit 21 flashes the flash mark at 2 Hz to display the uncharged state of the strobe unit 13 with the liquid crystal display device 32. The liquid crystal display driver 31 is operated to output image data corresponding to a flash mark stored in the RAM 23 or the like.

Therefore, the flash mark flashes by 2 Hz with the liquid crystal display device 32 to display the operation state of the current stroboscopic unit 13. Then, the central processing unit 21 of the operation control unit 2 converts the operation state to the release signal lock control state so as to stop the photographing operation of the subject in the uncharged state of the stroboscopic unit 13 (S21). In operation S19, the charging completion state of the strobe unit 13 is determined. Therefore, even when the release two-stage switch SW2 is operated because the signals inputted from the first and second stage switches SW1 and SW2 are not executed, the photographing of the subject is prevented, thereby preventing poor photography.

On the other hand, when the read signal state is the charging completion state of the strobe unit 13 (S19), the central processing unit 21 releases the release signal lock control state (S22), the liquid crystal display device 32 The operation of the liquid crystal display driver 31 is controlled to display the conventional flash mode, and normal stroboscopic imaging control is executed (S23, S24).

However, when the determined luminance state of the step S18 is a state in which image stabilization is to be performed, the central processing unit 21 of the operation control unit 2 outputs a corresponding control signal for the light emission operation of the strobe unit 13. Thereafter, the signal output from the strobe unit 13 is read to determine whether the charging operation of the strobe unit 13 for the light emission operation is completed (S25).

When the signal of the state corresponding to the completion of charging is not read from the strobe unit 13, the central processing unit 21 flashes the corresponding driving signal to flash the flash mark indicating the flash operation at a set period of 2 Hz. The control unit 31 outputs the image data corresponding to the flash mark stored in the memory device of the RAM 22 and outputs the read-out data (S26).

Therefore, since the liquid crystal display device 32 is operated by the liquid crystal display device driver 31 to output the input image data, the flash mark flashes at a period of 2 Hz.

Then, the central processing unit 21 of the operation control unit 2 converts the operation state to the release signal lock control state so that the shooting operation of the subject can be stopped because the state of the strobe unit 13 is not charged. However, even when the switch SW2 is operated, the photographing of the subject cannot be performed (S27), and it is determined whether the charging operation of the stroboscopic unit 13 is completed (S19).

However, when the signal state input from the stroboscopic unit 13 in the step S25 is the charging completion state, as shown in FIG. 2B, the central processing unit 21 of the operation control unit 2 uses the light emitting diode LED1. ) And outputs a driving signal for blinking 4HZ, thereby blinking the light emitting diode LED1, thereby displaying a shake control state (S28).

Then, the release signal lock control state is released (S29), and the liquid crystal display device 32 outputs a corresponding video signal and a driving signal so as to display the flash mode (S31). By using it to select the desired flash shooting, and by the operation of the release two-stage switch (SW2) or the like so that the normal strobe shooting can be made (S31).

As described above, when the distance to the subject is a normal distance from which the photographing operation can be normally performed, the operation state according to the ambient luminance state is displayed by using the flash mark of the light emitting diode LED1 and the liquid crystal display 32.

However, when the distance to the subject determined in step S15 above is a short range state not greater than the normal distance, the normal shooting operation is not performed, and thus the short range state should be displayed to the user.

Therefore, as shown in FIG. 2C, the central processing unit 21 of the operation control unit 2 determines whether the determined luminance state is a low luminance state (S32), and the stroboscopic unit 13 when the luminance state is low. It is determined whether the charging state of the stroboscopic unit 13 is completed using the output signal of (S33). When the charging operation is completed, the driving signal for turning on the LED 1 at 8 Hz is output (S34), and the corresponding driving is performed by the liquid crystal display driver 31 to output the flash mode to the liquid crystal display 32. The image data corresponding to the signal and the flash mode are output (S35). Since the distance to the subject is close, the release signal is locked (S36), and the first step S11 is performed in order to prevent normal shooting operation.

However, when the determined strobe unit 13 is in an uncharged state, the central processing unit 21 outputs a corresponding driving signal and image data so that the flash mark flashes at 2 Hz to the liquid crystal display device 32. The operation state is switched to the release signal lock control state (S37, S38).

When the determined luminance state is a high luminance state in which the light emitting operation of the strobe unit 13 is not a low luminance state (S32), the central processing unit 21 of the operation control unit 2 charges the strobe unit 13. Immediately without determining the completion state, the light emitting diode LED1 blinks at 8 Hz and the flash mode is displayed on the liquid crystal display 32, and then the release signal is locked to control the photographing operation of the subject to be impossible (S35, S36). .

As described above, the operation for displaying the operation state of the camera by using the flash mark on the one light emitting diode LED1 and the liquid crystal display 32 is summarized in the following table (Table 1).

Distance from subject Charge status of stroboscopic part Light Emitting Diode (LED1) Flash mark Release signal Normal distance Charging Working 2 Hz flashing Lock control Charging completed light on Flash mode indicator Unlock Image stabilization Charging Working 2 Hz flashing Lock control Charging completed 4 Hz flashing Flash mode indicator Unlock Near Charging Working 2 Hz flashing Lock control Charging completed 8 Hz flashing Flash mode indication Lock control High brightness city 8 Hz flashing Flash mode indication Lock control

The effect of this design, which operates in this way, uses a light-emitting diode, which is a display device, which simplifies the structure, increases the degree of freedom in design, realizes cost reduction, and simplifies the assembly process of parts, thereby reducing assembly time and defect rate. Can be reduced.

In addition, since the various operating states of the camera can be displayed, it is possible to accurately determine the operating state of the camera to realize high quality photography, and to forcibly photograph the subject when the operating state of the camera is in a state where high quality pictures cannot be obtained. It interferes with the operation, avoiding unnecessary film waste and allowing you to capture the subject you want normally.

In addition, since the light emitting diode and the liquid crystal display, which are display devices for displaying the operating state of the camera, are mounted on the back of the camera, the operating state of the light emitting diode and the liquid crystal display can be accurately and accurately grasped. This can prevent problems caused by not recognizing the problem.

Claims (8)

Focus adjusting means for outputting an electric signal corresponding to the distance to the subject; Photometric means for outputting a corresponding electrical signal in accordance with the luminance state around the subject; An imaging switch for outputting a drive signal for operating the focus adjusting means and the photometric means; Flash means for emitting light for correcting the amount of luminance around the subject; Image display means for displaying a corresponding image; State display means for varying an operating state according to a state of an applied signal; When the photographing switch is operated, the focus adjusting means and the metering means are operated to determine the distance from the subject and the amount of brightness, and when the determined brightness amount is a low brightness state in which the flash means should be operated, the state of the signal output from the flash means is determined. And an operation control means for outputting an image set to the image display means according to whether or not the charging is completed, and outputting a signal for changing an operation state of the state display means according to the determined distance to the subject. The operation state display device of the camera, characterized in that. The method of claim 1, wherein the video display means, An operating state display device of a camera, characterized in that the liquid crystal display device. The method of claim 1, wherein the operation control means, If the state of the signal output from the flashing means is not completed the charging of the flashing means flashes the image set by the image display means for a set first period, And a flash mode for displaying a flash photographing mode by means of an image display means when the state of the signal output from the flash means is in a state where charging of the flash means is completed. The method of claim 1, wherein the operation control means, When the distance to the determined subject is the normal distance at which the subject shooting operation is normally performed, If the state of the signal output from the flash means is a state in which the charging of the flash means is not completed, without operating the status display means, And operating the status display means when the state of the signal output from the flash means is the state in which the charging of the flash means is completed. The method of claim 1, wherein the operation control means, When the determined luminance amount requires the camera shake control below the set luminance amount, If the state of the signal output from the flash means is a state in which the charging of the flash means is not completed, without operating the status display means, And the status display means blinks for a set second period when the state of the signal output from the flash means is the state where the charging of the flash means is completed. The method of claim 1, wherein the operation control means, If the distance to the determined subject does not exceed the set distance, If the state of the signal output from the flash means is a state in which the charging of the flash means is not completed, without operating the status display means, And the status display means blinks for a set third period when the state of the signal output from the flash means is completed. The method of claim 1, wherein the operation control means, And the photographing operation of the subject is not performed when the operation state of the flashing means is being charged or when the distance to the subject is close to the subject, regardless of the operation of the photographing switch. The method of claim 1, wherein the status display means, An operation state display apparatus of a camera, characterized in that the light emitting diode.