JPH06101001B2 - Electronic computer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electronic computer (hereinafter, abbreviated as a calculator),
More specifically, it relates to an electronic computer having a transparent keyboard portion.

[Prior Art] There is known a calculator in which a keyboard portion is made transparent by using a transparent conductive film in which indium tin oxide or the like is formed by vapor deposition on the surface of a transparent polyester film or the like.

In a calculator of this type, only the key figures are displayed on the transparent keyboard part, so that the user can see the document on the back side where the calculator is placed through the keyboard part.

When a calculator equipped with such a transparent keyboard is projected using, for example, an overhead projector or the like, key numbers are projected on a screen or the like, and a state in which key operations are performed can be shown to many people.

Many of these calculators are equipped with solar cells as a power source.

[Problems to be Solved by the Invention] When the calculator having the above-described structure is projected and used by an overhead projector, the solar cell is on the front side and the interior is often darkened. Often does not work.

In such a case, another solar cell is required, which is extremely inconvenient.

Further, when a reflective type liquid crystal display device is used, the display state cannot be projected, and when a transmissive type liquid crystal display device is used, the display is difficult to see in a normal use state.

[Means for Solving Problems] In the present invention, in order to solve the above-mentioned problems, a solar cell is provided on the front surface and the back surface of the main body, and a transmissive liquid crystal display is used and a transmissive liquid crystal display is used. Adopted a structure in which a reflection plate is detachably attached to the back side of the liquid crystal display.

[Operation] When the structure described above is adopted, even if the room is darkened and the calculator is placed on the overhead projector, it is possible to generate power using the solar cell on the back of the calculator by the light source on the overhead projector side. If the reflector is removed, it becomes a transmissive liquid crystal display, and the liquid crystal display state can be projected using an overhead projector together with the key numbers of the transparent keyboard.

Further, when used with the reflection plate attached, it becomes a reflection type liquid crystal display, and the liquid crystal display can be clearly seen during normal use.

[Examples] Hereinafter, details of the present invention will be described based on Examples shown in the drawings.

FIG. 1 and the following figures illustrate an embodiment of the present invention.
The figure shows the whole.

In the figure, the calculator generally designated by reference numeral 1 has a transparent keyboard portion 2 in which a key numeral 3 is displayed.

These key numbers 3 are arranged so as to face the electrodes made of a transparent conductive member that form a key input switch.

A transmissive liquid crystal display 4 is arranged above the keyboard portion 2, and a solar cell 5 is provided on the front and back of the main body on the upper side thereof.
6 are provided (see FIG. 2 for the solar cell 6 on the back).

The frame 7 of the calculator 1 is formed with an accommodating portion 9 below the liquid crystal display 4 for accommodating the reflector 8 in a detachable manner.

The mounting structure of the solar cells 5 and 6 is as shown in FIGS. 3 and 4. That is, in both figures, the reference numeral 7a indicates a partition plate integrated with the frame 7, and 7b is provided with solar cells 5 and 6 above and below with the partition plate 7a sandwiched by flanges.

A damper 10 is arranged between the partition plate 7a and the solar cells 5 and 6. The periphery of both solar cells 5 and 6 is held by a flange 7b of the frame 7.

On the other hand, a printed circuit board 11 is provided in the vicinity of the solar cells 5 and 6 in the frame 7 and on the same plane as the partition plate 7a, and is connected to the solar cells 5 and 6 by a heat seal connector 12.

On the other hand, the liquid crystal display 4 has an upper glass 13 and a lower glass 14 as shown in FIG. 6, and a liquid crystal (not shown) is sealed between them.

An upper polarizing plate 15 is stacked on the upper glass 13, and a lower polarizing plate 16 is stacked on the lower side of the lower glass 14. The transmissive liquid crystal display 4 is connected to a printed circuit board 18 via a heat seal connector 17.

The reflection plate 8 is detachably accommodated in the accommodating portion 9 formed in the frame 7 on the back side (lower side in the drawing) of the liquid crystal display 4 described above.

FIG. 5 shows a state of use for educational purposes in which the reflector 13 is removed. That is, the reference numeral 21 in FIG. 5 is an overhead projector, and the light source 19 and the lens 20 are housed under the glass plate 23 of the base 22 as shown in FIG.

The calculator 1 having the above-described structure is placed on the glass plate 23.

The base 22 is provided with a projection unit 25 via an arm 24.

The projection unit 25 is provided with a condenser lens 26 and a reflection plate 27.

The above-structured overhead projector 21 is equipped with a light source.
An image transmitted through an object placed on the glass plate 23 in the ON state can be projected on a screen or a wall surface via the reflection plate 27.

Therefore, when the calculator 1 having the above-described structure is placed on the glass plate 23, light can pass through the transparent keyboard portion 4 and the transmissive liquid crystal display 4, so that the key figures and the liquid crystal display state are projected on the screen or the like. be able to.

When a key operation is performed in front of a large number of people in this projection state, the numerical value and the calculation result are displayed together with the keyboard, so that a great effect can be exerted in the place of education on how to use the calculator.

On the other hand, when it is desired to use it as an ordinary calculator, the liquid crystal display can be easily viewed by using the reflector 8 housed in the housing 9.

On the other hand, in this embodiment, the solar cell 6 is also provided on the back surface of the calculator 1.
Since it is provided, even if the calculator 1 is placed on the glass plate 23, the light source 19 can be used to generate power. Therefore, even if the room is dark, a power source such as a battery is not required. Absent.

[Effect] As is apparent from the above description, according to the present invention, the solar cells are provided on the front surface and the back surface of the main body, and the transmissive liquid crystal display is used and on the back side of the transmissive liquid crystal display. Since a structure is provided that has a housing to which a reflector is detachably attached, it is possible to use the light source of the overhead projector to generate electricity even when the room is dark, such as when using an overhead projector. Not.

Further, if the reflector is removed, a transmissive liquid crystal display is provided, and the liquid crystal display state can be projected by using an overhead projector together with the key numbers of the transparent keyboard.

Further, when used with the reflection plate attached, it becomes a reflection type liquid crystal display, and the liquid crystal display can be clearly seen during normal use.

[Brief description of drawings]

1 is a perspective view of a calculator, FIG. 2 is a perspective view of the calculator seen from the rear, and FIG. 3 is a sectional view taken along the line AA of FIG. 4, FIG. 4 is a sectional view taken along the line BB of FIG. 1, FIG. 5 is a perspective view of the state of use, and FIG. 6 is a sectional view taken along the line CC of FIG. 1 ... Calculator, 2 ... Keyboard part 4 ... Liquid crystal display, 5,6 ... Solar cell 7 ... Frame, 8 ... Reflector 9 ... Accommodation part

Claims (1)

[Claims] 1. A transparent keyboard unit, a transmissive liquid crystal display, and solar cells provided on the front and back of the main body, and a reflector is detachably attached to the back side of the transmissive liquid crystal display. An electronic computer having a storage unit capable of storing.