JPS6010346B2 - Electronics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thin electronic device, such as an electronic desktop calculator (hereinafter referred to as a calculator), and particularly to an electronic device that is as thin as 2 to 0.5 degrees and has maneuverability.

When constructing a thin, flexible calculator, there are several points that must be kept in mind compared to constructing a calculator with a rigid structure. One of them is the power switch.
In the past, power switches were often attached to the side of the calculator body, but as calculators become thinner, it becomes more difficult to do so, and they are now forced to be placed on the same surface as the keyboard. In addition, the switch mechanism has come to be seen not only as a mechanical lock switch, but also as power switches P1 and P2, which turn the power on and off by setting and resetting electronic flip-flop circuits, as shown in Figures 5 and 6. Ta. In such a configuration, careless power-on will waste the battery, which must be avoided at all costs. In particular, as shown in Figures 5 and 6, if a keyboard with a contact type such as conductive rubber is used, the power switch PI will be turned on inadvertently, which is very inconvenient when the keyboard has a sacrificial object such as a credit card or a cash card. It is. This also applies when you carry it around in a flexible notebook case, business card holder, etc. Furthermore, conventional two-color molded plastic key tops are too thick and expensive for keyboard keys, which is undesirable.

Therefore, it is convenient to provide letters and symbols by printing or the like on a uniformly flat key sheet, but this is not preferable because repeated contact with fingers or the like causes them to gradually peel off or fade, making them illegible. In view of the above points, the present invention provides an extremely suitable electronic device in which the power switch will not be turned on inadvertently no matter how the keyboard of the electronic device is bent, and the characters, symbols, etc. on the key surface will not be blurred. It provides: Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a diagram showing the principle of a key switch used in electronic equipment of the present invention. As shown in the figure, a signal P is transmitted from a transmitting electrode A to a counter electrode C via a capacitance C^, and a capacitance CB is transferred to a receiving electrode B.
transmitted via. If a finger touches the counter electrode C, most of the signal flows to the human body, and the signal P from the receiving electrode B weakens. The receiving side compares the reference signal ref and the received signal P, and when the received signal becomes smaller than the reference signal, it is detected that a key has been operated. If such a switch is used, the power switch will not be turned on unless a finger comes into contact with it, so it is extremely preferable for a thin, manoeuvrable calculator. Figure 2 shows A in a specific example.
, A' are transmitting side electrodes, and B and B' are receiving side electrodes.

C and 0 are transparent electrodes made by depositing palladium alloy, indium oxide, tin oxide, etc. on a transparent sacrificial resin sheet D, such as a polyethylene terephthalate sheet or a vinyl chloride sheet. The symbols or letters E and E' were formed on the back surface of the flexible sheet D by offset printing, silk printing, or the like. Therefore, since fingers do not touch directly, letters, symbols E, E
' is hardly faded. F is a board for transmitting electrodes A, A', receiving electrodes B, B', and wiring patterns G, G' for each of the electrodes, and a commonly used flexible printed circuit board may be used. Figure 3 shows another embodiment, in which symbols, colors, characters, etc. are printed by offset printing or screen printing on an insulating movable plate provided between the stamped substrate F and the sheet D, and the transparent electrode C and transparent sheet D so that they can be seen through them.

As another example, if the structure shown in FIG. 2 is made so that the sheet D serving as the transparent electrode and the dial plate is made replaceable, and the transparent electrode C'' is selectively provided on the uppermost stage as shown in FIG. In other words, since C'' has a transparent electrode, the signal P is transmitted to the receiving electrode through the opposing electrode. In addition, since the signal P is not transmitted in the electrode part without the transparent electrode C'', each sheet can be identified by the combination of these.The transparent electrode used in this example is an inert vapor-deposited film, but aluminum vapor-deposited film, etc. A protective film may be further provided thereon.

Figures 5 and 6 are examples of flexible thin calculators, which are equipped with a keyboard as shown in Figure 2, so no matter how much you bend it, the power switch PI will not turn on just by bending it.

It turns on only when a human finger touches it. If you want to turn off the power, just touch switch P2.
B is an elongated or button-shaped battery, D is a passive low power consumption type numeric display such as a liquid crystal, electrochrome, P-mount T, etc., 1 is an LSI, and super is a logic operation element such as 1.

In this way, if the weakest display device ○ is protected by surrounding it with the battery B logic element L, and if it is concentrated at the edge of the board F, the remaining keyboard part becomes a free end, and its flexibility can be fully utilized. can be demonstrated. With this structure, it is possible to provide an extremely preferable thin calculator that bends along the lines of the body even when placed in a pocket, so there is no possibility of bending or breaking due to cloth.

[Brief explanation of the drawing]

Figure 1 is a principle diagram explaining the present invention, Figure 2 is a diagram showing an example of a key switch, Figure 3 is another example diagram, Figure 4 is an example diagram with a cord, and Figures 5 and 6 are diagrams showing an example of a key switch. It is a concrete example figure. A, A', B, B'... Electrode, C, C', C''...
...Transparent electrode, D...Transparent sheet. Fukuro'zu Tsutomu 2 figure 3rd degree G younger brother's figure s figure 5th figure

Claims (1)

[Claims] 1. In an electronic device having a power switch on the top surface of a keyboard, a transparent flexible sheet in which a transmitting electrode and a receiving electrode are provided on a substrate, and a transparent electrode is provided at a position opposite to the transmitting electrode and the receiving electrode. A thin flexible electronic device, characterized in that it is provided on the substrate, and includes a keyboard in which characters, symbols, etc. are housed between the substrate and the transparent flexible sheet. 2. The thin flexible electronic device according to item 1, wherein the transparent flexible sheet is provided with an electrode for generating a code signal, and the sheet is automatically discriminated.