JPS62211884A - Lighting of touch switch push-button - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a push button section which is an operating section of a tag switch, and in particular, the push button section is provided with an illumination section on the back side to make it self-illuminated. Related to things.

[Prior art 1] The structure of a conventional touch switch of this type is as shown in FIG.
and the substrate 12 with a small gap between them, and electrodes 14 and 15 are provided on the inner surface thereof so that they intersect with each other, so that a finger can be removed from the thin film 11 side. When touching the substrate 12, the thin film 11 bends due to its flexibility and comes into contact with the substrate 12, and this contact also brings the respective electrodes 14 and 15 into contact.
A switch is turned on.

At this time, in order to make the touch switch self-illuminated, the constituent members of the touch switch are made translucent, a lighting board 16 is further provided on the back side, and a light emitting element is mounted on the board 16. 17 and connect it to an appropriate electric circuit.

[Problem to be Solved by the Invention 1] However, this conventional touch switch still has contacts, and it is different from normal touch switches in terms of the contact pressure of the contacts and the materials that can be used for the contacts. This is disadvantageous compared to mechanical switches, and due to these reasons, reliability is extremely problematic. In order to solve this problem, capacitive touch switches that do not use the above-mentioned contacts have been proposed and have been put into practical use in some cases, but these types of switches have complicated circuit configurations. It is difficult to say that this problem has been completely solved, as it not only reduces the cost of the switch but also causes malfunctions due to heat and other factors.Furthermore, when using a self-illuminated touch switch, it must be thin. The most important feature of the touch switch is that the lighting substrate is provided on the back side, making it thick, which also causes the problem that its features cannot be fully demonstrated.

[Means for Solving the Problems] As a specific means for solving the problems of the conventional ones described above, the present invention provides a self-illuminating touch switch push button with a lighting section near the back of the push button section. The push button is a crystal oscillator made of crystal in an optically suitable shape such as a lens shape, and the crystal oscillator is provided with a pad made of a transparent electrode on the back side, and the pad is provided with an L. The above-mentioned conventional problems are solved by providing a method for illuminating a touch switch push button, which is characterized in that a light emitting element chip such as ED is bonded to form an illumination part, thereby integrating the push button part and the illumination part. It is something.

[Embodiment 1] Next, the present invention will be explained in detail based on an embodiment shown in the drawings.

What is not indicated by reference numeral 1 in FIG. 1 is a crystal resonator which is a push button part, and has a unique resonant frequency by cutting a crystal piece in an appropriate crystal direction and size. In particular, it has a shape that is optically considered, such as a lens shape.

A transparent surface electrode 2 made of tin oxide or the like is provided on almost the entire surface of the crystal resonator 1 by an appropriate method such as vapor deposition, and a back electrode 3a is provided on the entire surface of the crystal resonator 1 except for approximately the center.
However, in this embodiment, the back electrode 3a does not need to be transparent, but rather has a mirror surface made of aluminum, silver, or the like. A pad 3 is formed by a transparent electrode at a substantially central position on the back side of the crystal resonator 1.
b is provided, and a terminal electrode 3C is also provided adjacently. FIG. 2 shows this state from the back side of the crystal resonator 1. As explained above, a chip 4 of a light emitting element such as an LED (light emitting diode) is mounted on the pad 3b of the crystal resonator 1 on which each electrode is arranged, and a chip 4 of a light emitting element such as an LED (light emitting diode) is mounted through the terminal electrode 3C by wire bonding or the like. Wiring has been done and it is used as a lighting section. In this way, the crystal oscillator 1 on which the chip 4 of the light emitting element is mounted is held between the holder 5 provided on the substrate 6 and which also serves as a 1st pneumatic connection, and is connected to a crystal oscillation circuit (such as a Pierce oscillation circuit).
(not shown), and the chip 4 is also connected to an appropriate electrical circuit for which display is desired, such as the output of a touch switch. By configuring the self-illuminated touch switch as described above, whenever the crystal oscillator 1 is touched with a finger or the like, the vibration of the crystal oscillator 1 is forcibly stopped, thereby causing the crystal oscillation. The circuit will stop oscillating, and if this cessation of oscillation is detected by a low-pass filter or the like, a switching effect will be obtained.

By lighting the chip 4 with this switch operation signal, it is possible to display that the switch in question is in operation. At this point, the light emitted from the chip 4 is reflected by the back electrode 3a and radiated forward, and the optical shape in which the crystal resonator 1 is formed, for example, a lens shape, allows the intended light distribution to be carried out. It is something that can be done. The shape of the crystal resonator 1 is not limited to a lens shape, but may be any shape such as a hemisphere or a diamond-shaped cup as shown in FIGS. 3 and 4. In short, it is good as long as it can provide the desired light distribution for the purpose.

[Effects of the Invention] As explained in detail above, in the self-illuminated touch switch push button according to the present invention, the push button is a crystal resonator having an optically suitable shape such as a lens shape. A transparent electrode pad is placed on the back side of the crystal oscillator, and a chip of a light emitting element such as an LED is bonded to the pad to form the illumination section.The push button section and the illumination section are integrated into one, which makes it inherently thin. This solves the problem that touch switches that should be self-illuminated become thick and lose their characteristics significantly, and has a great effect on improving the practicality of this type of touch switch by making it thinner than before. It is something.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an embodiment of the touch switch push button illumination method according to the present invention, Fig. 2 is an explanatory view seen from the arrow ■ side of Fig. 1, and Figs. FIG. 5 is a partially cutaway perspective view of a conventional example. 1... Water quality vibrator 2... Surface electrode 3a... Back electrode 3b... Pad 3C.
...Terminal electrode 4...Chip 5...
...Holder 6...Board diagram 1

Claims (1)

[Claims] In a self-illuminated touch switch pushbutton with an illumination section near the back of the pushbutton, the pushbutton is a crystal oscillator with a crystal in an optically suitable shape such as a lens shape, and the crystal oscillator has an illumination section on the back side. A pad made of transparent electrodes is placed on the
A method for illuminating a touch switch push button, characterized in that a light emitting element such as an LED chip is bonded to the pad to form a lighting section, thereby integrating the push button section and the lighting section.