JPH0693217B2 - Electronics - Google Patents

Description

TECHNICAL FIELD The present invention relates to an electronic device, and more particularly to an electronic device in which a large transparent keyboard and a large liquid crystal display are combined.

[Prior Art] Electronic devices that perform various displays by combining a large transparent keyboard and a large liquid crystal display are DPK (Display Panel Keybo
ard), is used for various displays.

[Problems to be Solved by the Invention] However, in this type of conventional electronic equipment, the electronic equipment is merely a display means, and even if an attempt is made to project such electronic equipment by using an overhead projector, etc. It is necessary to use a liquid crystal display device of the type, and when such a structure is adopted, projection is possible, but in normal use, the display is extremely difficult to see and cannot be used effectively.

[Means for Solving Problems] In order to solve the above-mentioned problems, the present invention has a transparent keyboard and a transmissive liquid crystal display arranged on the back side thereof, and uses an overhead projector. Configured to be displayable.

In addition, a transmissive liquid crystal display is used, and a structure in which a reflector is attached to and detached from the back of the LCD is used. Therefore, if the reflector is removed, all the states displayed on the display panel are overhead. It can be projected by a projector.

[Embodiment] The present invention will be described in detail below based on an embodiment shown in the drawings.

1 to 11 illustrate one embodiment of the present invention.
The overall structure is shown in FIG.

In the figure, an electronic device generally designated by reference numeral 1 has a display panel (DPK) 3 surrounded by a frame (frame portion) 2.

The display panel 3 has a key input section 4 before and after input.
The layout display section 5 and the handwriting input section 6 are partitioned and the area ratio is about 2: 1: 1.

A power switch 7, an edit key 8, a set key 9 and a screen scroll key 10 are provided on a part of the frame 2.

Edit key 8 is a key to put the electronic device in the input state,
When this key is pressed, the initial screen as shown in FIG. 1 appears.

The set key 9 is a key for enlarging the state displayed on the layout display section 5 over the entire surface of the display panel 3, as described later.

The screen scroll key 10 scrolls the layout display unit 5 or the screen in the enlarged display up and down, and can scroll the screens stored in the storage device housed in the frame one after another as described later. it can.

Although not shown in the drawing, the handwriting input unit 6 displays a cursor so that it is possible to confirm at which position the handwriting input is to be made in correspondence with the layout display unit 5.

Further, a portion indicated by reference numeral 11 formed on one side surface of the frame 2 is an accommodation portion for a reflection plate described later.

Next, the internal structure of the electronic device having the above-described external structure will be described with reference to FIGS. 6 and 9.

The display panel 3 is a transparent keyboard 12 and a transmissive liquid crystal display.
It is composed of 13 and.

The transparent keyboard 12 is a transparent sheet 14 made of plastic.
And a transparent circuit board 15, a transparent conductive pattern 16 forming a key input switch is formed on the lower surface of the transparent sheet 14, and a transparent conductive pattern 17 on the transparent circuit board 15 side facing the transparent conductive pattern 16 is formed. Are formed.

Further, a large number of dot spacers 18 made of transparent ink or the like are formed on the lower surface of the transparent sheet 14 at predetermined intervals,
The transparent sheet and the transparent circuit board are slightly separated from each other and supported.

Therefore, when the transparent sheet 14 side is pushed, it is elastically deformed and the transparent conductive patterns 16 and 17 come into contact with each other, and an input is made.

On the other hand, the transmissive liquid crystal display 13 has an upper polarizing plate 19 in order from the top,
It is composed of an upper glass 20, a lower glass 21, and a lower polarizing plate 22, and a liquid crystal (not shown) is enclosed between the upper and lower glasses 20, 21.

In addition, as shown in FIG.
Is provided, and this support fitting 23 allows the liquid crystal display 13
Is supported.

The transparent keyboard 12 is pressed and fixed on the liquid crystal display 13 by the frame 2.

The transparent sheet 14 of transparent keyboard and the transparent circuit board 15 are fixed at their peripheral edges by an adhesive 24 as shown in FIG.

On the other hand, a printed circuit board 25 is accommodated in the support metal fitting 23, and although not shown, an LSI, an IC, a memory and the like which form a control circuit, a storage device and a display drive circuit are mounted on the printed circuit board 25.

A conductive connector is provided between the printed circuit board 25 and the liquid crystal display 13.
26 is interposed and pressure-contacted by a support metal fitting 23 to be electrically connected.

On the other hand, on the back side of the liquid crystal display 13, the housing portion 11 is formed in the frame 2, and the reflecting plate 27 is detachably housed in the housing portion 11.

FIG. 10 shows a block diagram of an electric circuit of the electronic device having the above structure.

In FIG. 10, reference numeral 28 indicates a CPU (central processing unit), which controls the entire electronic equipment.

CPU28 has a clock generator 2 for controlling the timing.
9 and power supply 30 are connected.

In addition, a control program (11th
A ROM 32 containing a program shown in the figure) and RAMs 33 to 35 for storing key input results and layout states (pattern positions, shapes, etc.) are connected.

Further, the transparent keyboard 12, the above-mentioned edit key, and the other control key group 36 are also connected to the CPU 28 via the data bus 31, and the liquid crystal display 13 is connected to the CPU side via the IC 37 which functions as a driver and a decoder. There is.

Next, the control operation of the electronic device configured as described above will be described with reference to the flowchart of FIG.

First, when the power switch 7 is pressed, the initial screen divided as shown in FIG. 1 is displayed in step S1.

Then, in step S2, it waits for any key input.

The key input in step S2 is not the key input in the key input unit 4, but the edit key or other control key input.

When a key input is made, it is determined in step S3 whether or not the key input is an edit key input.

In the case of edit key input, since it is possible to input through the key input unit 4 and the handwriting input unit 6 of the display panel 3, various inputs are made in step S4.

For example, if input is performed using the key input unit 4, the RAM 1, 2
Then, the contents are laid out and the input result is displayed on the layout display section 5 as shown in FIG. That is, when the key 36 is pressed in FIG. 10, the code enters the RAM2. RAM2 is the pattern in the P area of ROM32 RAM1
Put it in 0. The contents of the RAM1 are changed in size (for example, four times) as needed, and the contents are transferred to the DPK3 for display.

Further, when input is performed with a fingertip or the like via the handwriting input unit 6, the handwriting input result is similarly displayed on the layout display unit 5, as shown in FIG.

Needless to say, handwriting input can be performed in combination with input by the key input unit 4 using a cursor (not shown) as a guide.

On the other hand, if it is determined in step S3 that it is not the edit key input, the process proceeds to step S5, it is determined whether or not it is the set key input, and if it is the set key input, the layout display unit 5 is displayed in step S6. The display in FIG. 3 is enlarged and displayed over the entire surface of the display panel 3 as shown in FIGS.

If it is determined in step S5 that the input is not the set key, the process proceeds to step S7, and it is determined whether the input is the scroll key.

If there is a scroll key input, the process proceeds to step S8, and it is determined whether or not ON TIME <1 (S). If YES, 1-line scroll is performed in step S9, and if NO, NO. In step S10, one screen scroll is performed.

When it is determined in step S7 that there is no scroll key input, the process returns to step S2.

Hereinafter, the same operation is repeated.

By the way, the usage form on the desk is as described above, but in this case, in order to make the display state clear, the reflection plate 27
Key input and display are performed in a state in which is installed in the housing portion 11.

On the other hand, when it is desired to perform projection using an overhead projector or the like, the reflection plate 27 is removed and projection is performed.
This state is shown in FIG.

In FIG. 8, reference numeral 38 indicates an overhead projector, and a light source is housed in a base 39 thereof.
A glass plate 40 is arranged on the upper surface of the base 39.

The electronic device 1 from which the reflection plate has been removed is placed on the glass plate 40.

An arm 41 extends from a part of the base 39, and a projection section 42 is provided on the upper end of the arm 41.

The projection unit 42 includes a lens 43 and a reflection plate 44, and the light passing through the display panel of the electronic device 1 is collected by the lens 43 and is projected by the reflection plate 44 toward the screen or the wall surface.

When the reflection plate 27 is attached, as shown by the arrow S in FIG. 7, the light is reflected by the reflection plate, and the light from the lower side is blocked by the reflection plate 27, but when there is no reflection plate. The display panel 3 as shown by the arrow T in FIG.

Of course, characters and patterns do not pass through, and this part is projected as a shadow on the screen or the like.

By removing the reflector in this way, it is possible to perform projection by an overhead projector, and it can be widely used for educational purposes.

In this case, enlarged display and screen scrolling can be performed.

In the above-described embodiment, the screen is scrolled in the vertical direction. However, the screen can be scrolled in the horizontal direction, or the display of the layout display unit is partially enlarged. You may comprise.

[Effect] As is apparent from the above description, according to the present invention, a transparent keyboard, a storage unit for storing the information input from the transparent keyboard, and a control unit for displaying the information in the storage unit with a variable magnification. And the configuration of an electronic device having a transmissive liquid crystal display arranged on the back surface of the transparent keyboard and for displaying the information by the control means, the display contents of the transmissive liquid crystal display are overhead. An excellent effect that it can be projected by a projector or the like is obtained.

[Brief description of drawings]

1 is a perspective view of an electronic device, FIG. 2 is a perspective view of the electronic device in a display state, and FIG.
3 and 5 are perspective views of the electronic device in an enlarged display state,
FIG. 4 is a perspective view of the electronic device in a handwriting input state, FIG. 6 is a sectional view taken along line AA of FIG. 1, FIG. 7 is a sectional view taken along line BB of FIG. 1, and FIG. FIG. 9, FIG. 9 is an enlarged perspective view of a main part, FIG. 10 is a block diagram of a control circuit, and FIG. 11 is a flow chart of control operation. 1 ... Electronic equipment, 2 ... Frame 3 ... Display panel, 4 ... Key input section 5 ... Layout display section 6 ... Handwriting input section, 8 ... Edit key 9 ... Set key 10 ... Screen scroll Key 11 …… Accommodation area, 12 …… Transparent keyboard 13 …… Liquid crystal display, 27 …… Reflector

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-59-19924 (JP, A) JP-A-56-155930 (JP, A) JP-A-60-249129 (JP, A) JP-A-60- 213935 (JP, A) Actual development Sho 59-131740 (JP, U)

Claims (2)

[Claims] 1. A transparent keyboard, a storage means for storing information input from the transparent keyboard, a control means for displaying the information in the storage means in a variable magnification, and a control means arranged on the back surface of the transparent keyboard. And a transmissive liquid crystal display for displaying the information. 2. The electronic device according to claim 1, further comprising a storage section on a back surface of the transmissive liquid crystal display, the accommodating section having a reflection plate for reflecting light transmitted through the transmissive liquid crystal display mounted therein. .