JPH0593958A - Enlarging projection device - Google Patents

Abstract

PURPOSE:To provide an overhead projector capable of easily being operated even in a dark room. CONSTITUTION:The overhead projector is provided with a projector main body 1, an enlarging/projecting part including a liquid crystal display part 2 and a head 6, a remote controller 9, and a CPU. The enlarging/projecting part is one for enlarging/projecting picture data. The remote controller 9 has plural keys capable of emitting light, for inputting operation information to the enlarging/projecting part. The CPU allows only a necessary key out of plural keys to emit the light.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to magnifying projection apparatus, and more particularly to
The present invention relates to a magnifying projection device including an operation unit having a plurality of keys for inputting operation information.

[0002]

2. Description of the Related Art Enlarged projection devices such as overhead projectors (hereinafter referred to as OHPs) and slide type projectors are mainly used in conferences, lectures and the like. In this type of magnifying projection device, an image formed on a film or the like is magnified and projected on a screen. Also, when using a magnifying projection device, it is usually necessary to darken the venue in order to make the projected image clear. On the other hand, in this type of OHP, the presenter makes an announcement and the OH
By operating P, the image is appropriately switched and displayed according to the degree of progress of the presentation.

By the way, when making a presentation at a conference or the like,
The OHP is operated while making a presentation, but if the operation of the remote control is complicated, the presentation cannot be performed smoothly. For this reason, the operation of the remote controller should be as simple as possible. In addition, since the venue is dark at the time of the presentation, the buttons on the remote controller cannot be fully viewed, and if the remote controller operation is complicated, an incorrect operation may be performed. For example, if you want to display the next screen, you accidentally display the previous screen. In this way, if the remote control is difficult to operate, it will place a heavy burden on the presenter.

An object of the present invention is to provide a magnifying projection device that can be easily operated even in a dark room.

[0005]

An enlarging / projecting apparatus according to the present invention comprises an enlarging / projecting section, an operating section, and a control section. The magnifying projection unit is for magnifying and projecting image data. The operation unit has a plurality of keys capable of emitting light for inputting operation information to the enlarged projection unit. The control unit causes only the necessary keys of the keys to emit light.

[0006]

In the magnifying projection apparatus according to the present invention, when the operation information is input to the magnifying projection unit via the operation unit, the control unit causes only the necessary keys of the operation unit to emit light. Therefore, the keys can be easily recognized even in a dark room, and only the necessary keys emit light, which enables easy operation.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an electronic O as an embodiment of the present invention.
HP is shown. The OHP mainly includes a projector main body 1 having a built-in light source and a liquid crystal display unit 2 mounted on the projector main body 1. On the back surface of the projector body 1, a stay 3 having an upper end protruding forward and a front end bent
Are arranged. A head 6 having a lens 4 and a reflecting mirror 5 for enlarging and projecting screen data displayed on the liquid crystal display unit 2 on a screen (not shown) is attached to the tip of the stay 3. The lens 4 can be moved up and down, and the focus can be adjusted.

The liquid crystal display unit 2 is provided at its center with a liquid crystal display panel (hereinafter, referred to as LCD) 7 which can be moved up and down by a driving means (not shown). This vertical movement is performed when changing the display magnification. Further, on the front surface of the liquid crystal display unit 2, a disk drive device (hereinafter, referred to as FDD) 8 for driving the flexible disk 8a, a light receiving unit 10 for receiving an infrared signal from a remote controller 9, a power switch 11, Are arranged. A card slot 12 for inserting the IC card 12a is arranged on one side surface of the liquid crystal display unit 2. Further, on the other side surface of the liquid crystal display unit 2, a thermal printer 13 for outputting the screen data displayed on the LCD 7 is arranged. Screen data to be displayed on the LCD 7 is recorded on the flexible disk 8a. Further, this screen data may be stored in the IC card 12a.

As shown in FIG. 2, the remote controller 9 includes a liquid crystal panel (hereinafter referred to as LCD) 20 and nine keys 21a.
The keyboard 22 is made up of .about.21i. The keys 21a to 21d are cursor keys for up, down, left and right. Keys 21e and 21f are "+" key and "-".
This key is used to switch screens. Key 21g
Is a copy key for instructing the operation of the thermal printer 13, and keys 21h and 21i are on / off keys used for turning on / off the power and confirming the input. further,
Each of the keys 21a to 21i is made of translucent resin, and the LED 70 (FIG. 3) is arranged on the back surface thereof. This allows
Each of the keys 21a to 21i can emit light as needed.

As shown in FIG. 3, the liquid crystal display unit 2 has a CP
Equipped with U41. The CPU 41 includes a ROM 42, an FD interface 43, an IC via the system bus 40.
Card interface 44, remote control interface 45, display controller 48, bus switch 47,
The printer interface 46, the buzzer circuit 53, and
Each is connected to the timer circuit 54. ROM 4
In 2, a control program for controlling the OHP is stored. The FD interface 43 is connected to the FDD 8. The IC card interface 44 is
It is connected to the card slot 12. The remote controller interface 45 is connected to the light receiving unit 10 that receives an infrared signal from the remote controller 9. The display controller 48 is connected to the row driver 49 and the column driver 52 of the LCD 7, respectively, and controls them to display on the LCD 7. The bus switch 47 is
The connection between the local bus 51 and the system bus 40 is controlled. The printer interface 46 is connected to the thermal printer 13. The timer circuit 54 generates a signal for driving the buzzer circuit 53 and a signal for displaying information regarding display time on a part of the LCD 7. The buzzer circuit 53 sounds a buzzer according to the drive signal generated by the timer circuit 54.

As shown in FIG. 4, the remote controller 9 is a CPU
61 is provided. The CPU 61 transfers R via the bus 60.
OM 62, keyboard interface 63, remote control interface 64, display control unit 65, screen memory 6
6 and the LED driver 69, respectively.
A control program for controlling the remote controller 9 is stored in the ROM 62. The keyboard interface 63 is connected to the keyboard 22. The remote controller interface 64 is connected to a light emitting unit 67 for generating an infrared signal according to a command input from the keyboard 22. The display control section 65 is connected to a liquid crystal driver 68 for driving the LCD 20. Screen data for displaying on the LCD 20 is stored in the screen memory 66, and the screen data is given to the liquid crystal driver 68. The LED driver 69 is connected to the LED 70, and turns on a desired LED 70 according to a command from the CPU 61.

Next, the general operation of the OHP will be described. Note that FIG. 5 is the control flow chart. First, the flexible disk 4a in which the screen data is recorded is prepared. The screen data is created, for example, by a personal computer or the like. Next, the flexible disk 4a recording the screen data is mounted on the FDD 8.
Then, the OHP is controlled by the instruction from the remote controller 9 to display the screen data on the LCD 7. In this remote control, the CPU 61 performs the following operations.

First, in step S1, each part is initialized. In step S2, as shown in FIG.
Display the menu on. In step S3, it is determined whether scroll processing has been selected from the displayed menu. If it is determined that the scroll process is not selected, the process proceeds to step S4. In step S4, it is determined whether or not the copy process for outputting the display screen to the thermal printer 13 has been selected. Selection of the copy process is performed by pressing the copy key 21g. If the copy process is not selected, the process proceeds to step S5. In step S5, another process is performed, and when the other process is completed, the process returns to step S2.

On the other hand, if it is determined in step S3 that the scroll process is selected, the process proceeds to step S6. In step S6, the LEDs 70 of the cursor keys 21a to 21d and the on key 21h are turned on, and the LEDs 70 of the other keys are turned off. In step S7, the cursor keys 21a-2
It is determined whether 1d is pressed. If the cursor key is pressed, the process proceeds to step S8, the infrared signal for the scroll process is transmitted from the light emitting unit 67, and the step S8 is performed.
Return to 7. If the cursor keys 21a to 21d are not pressed, the process proceeds to step S9. In step S9, it is determined whether or not the ON key 21h is pressed and the end of the scroll process is designated. If the on-key 21h is pressed, the process returns to step S2, and if the on-key 21h is not pressed, the process returns to step S7.

When it is determined in step S4 that the copy process is selected, the process proceeds to step S10. Step S
In the case of 10, the copy key 2 is used to inform the operator that the next copy cannot be performed until this copy process is completed.
The 1 g LED 70 is turned off. In step S11, the infrared signal of the copy process is transmitted from the light emitting unit 67. In step S12, it is determined whether or not copying is completed by waiting for a predetermined time. When it is determined that the copying is completed, the process returns to step S2.

As described above, in this embodiment, the keyboard 2
L of the keys required for operation among the keys 21a to 21i of No. 2
Since only the ED 70 is turned on to emit light, reliable operation can be performed even in a dark room. The remote control 9
When the OHP is operated by and the screen data is displayed on the LCD panel 7 and is enlarged and projected on the screen via the head 6, the data from the timer circuit 54 causes the time from the start of display to be displayed on the screen, for example. Displayed in the lower right corner. As a result, the elapsed time is displayed on the screen, and the presenter can know the elapsed time while making a presentation. Further, the operation of the buzzer circuit 53 causes the buzzer to sound when a predetermined time has elapsed from the start of display. By doing so, the presenter can manage the time division in the presentation by himself, and can make the presentation smoothly. For example, if the presentation time is 15 minutes, the buzzer sounds once in the remaining 5 minutes, the buzzer sounds twice in the remaining 1 minute, and the buzzer sounds 3 times when the presentation time expires.

[Other Embodiments] (a) Although a remote controller is used as the operation unit in the above embodiments, the operation unit may be provided in the main body. (B) Although the liquid crystal display type OHP is described as an example of the magnifying projection device in the above-described embodiment, the present invention can be applied to an OHP that magnifies and projects a normal transparent film. The present invention can also be applied to a slide type projector.

[0018]

In the magnifying projection apparatus according to the present invention, only the necessary keys of the operation unit emit light, so that the magnifying projection apparatus can be easily operated even in a dark room.

[Brief description of drawings]

FIG. 1 is a perspective view showing an OHP as an embodiment of the present invention.

FIG. 2 is a plan view of a remote controller.

FIG. 3 is a block diagram of a control system of a liquid crystal display unit.

FIG. 4 is a block diagram of a control system of a remote controller.

FIG. 5 is a flowchart showing a control operation of the remote controller.

[Explanation of reference numerals] 1 projector main body 2 liquid crystal display section 6 head 7 LCD 9 remote controller 21a to 21i key 22 keyboard 61 CPU

Claims (1)

[Claims] 1. A magnifying projection unit for magnifying and projecting image data, an operating unit having a plurality of light-emissible keys for inputting operation information to the magnifying projection unit, and only necessary keys among the keys. And a control unit for emitting light,
Enlargement projection device equipped with.