TWI450293B - Switch with light emitting diode - Google Patents

Description

Light-emitting diode switch

The invention relates to a switch, in particular to a switch having a light-emitting diode.

Light Emitting Diode (LED) is a solid-state semiconductor device that directly converts electricity into light. The heart of the light-emitting diode is a semiconductor wafer. One end of the wafer is attached to a holder, one end is a negative electrode, and the other end is connected to the positive electrode of the power source, so that the entire wafer is encapsulated by epoxy resin. The semiconductor wafer consists of three parts, one part is a P-type semiconductor, in which the hole dominates, and the other end is an N-type semiconductor, where it is mainly electrons, and the middle is usually a quantum well of 1 to 5 cycles. When a current is applied to the wafer by a wire, electrons and holes are pushed into the vector sub-trap. In the quantum well, electrons are combined with holes, and then energy is emitted in the form of photons. This is the light-emitting diode. The principle of luminescence. The wavelength of light, which is the color of light, is determined by the material that forms the P-N junction.

The general electronic device is basically equipped with a push button switch, and an indicator light for displaying the button on state is disposed near the push button switch. A light emitting diode is disposed in the indicator light. For example, in order to save space, a power button with a status display function is provided. The power button includes a panel, an actuating member fixed to the panel, a power switch, and a power indicator light indicating a power on/off state. The panel is provided with a mounting port, and the actuating member includes a pressing portion exposed from the mounting opening and a resisting portion for biasing the power switch when the pressing portion is pressed, the power switch and the power source indication The lamp is fixed to the inner side of the actuating member, and the actuating member further includes a first elastic portion and a second elastic portion that are deformed when the pressing portion is pressed, and the pressing portion is disposed at the first elastic portion and the second portion Between the elastic parts. However, the push button switch requires an additional mechanical component such as an actuator to be activated, taking up a large space.

In view of the above, it is necessary to provide a light-emitting diode switch that reduces mechanical components.

A light-emitting diode switch comprising a casing, a light guiding column, a button switch that can be turned on by the light guiding column, and at least one light-emitting diode that emits light by turning on the button switch, The light guide column is movably embedded in the housing.

Compared with the prior art, the light-emitting diode switch of the present invention uses the light guiding column to open the button switch, which reduces the mechanical components of the electronic device, is convenient and practical, and saves manufacturing cost.

10‧‧‧Light guide

11‧‧‧Resistance

20‧‧‧shell

21‧‧‧Lighting diode

22‧‧‧Metal shrapnel

1 is a schematic view of a first preferred embodiment of a light emitting diode switch of the present invention.

2 is a schematic view of a second preferred embodiment of the light-emitting diode switch of the present invention.

3 is a schematic view of a third preferred embodiment of the light-emitting diode switch of the present invention.

4 is a schematic view of the top of a light guiding column of the light-emitting diode switch of the present invention.

5 is a schematic view of a light guiding column and a housing of the light emitting diode switch of the present invention.

6 is a schematic view of a light emitting diode switch package of the present invention.

Referring to FIG. 1, a first preferred embodiment of the LED switch of the present invention includes a The light guide column 10 and a casing 20.

The light guide column 10 has a substantially cylindrical shape. The light guide column 10 includes an arcuate bottom surface 11. The curved bottom surface 11 includes a first end 112 and a second end 114 opposite the first end 112. The light emitting diode switch is packaged by a dual in-line package (DIP) to form the housing 20. The light guide bar 10 is embedded in the housing 20. The housing 20 is provided with a light emitting diode (LED) 21 and a metal dome 22 adjacent to the light emitting diode 21. The light emitting diode 21 and the metal dome 22 are located below the light guiding column 10 . The light emitting diode 21 is located below the first end 112 of the curved bottom surface 11 and has a gap formed between the first end 112 and the first end 112 to prevent the light emitting diode 21 from contacting the light guiding column. 10. The second end 114 of the curved bottom surface 11 is an abutting portion protruding from the first end 112 and is in contact with the metal dome 22 . The light emitting diode 21 is mounted in the housing 20 by Surface Mounted Technology (SMT). The light emitting diode 21 is available in various colors.

Four pins are drawn from the light-emitting diode 21 and the metal dome 22 in the housing 20. The light-emitting diode 21 is connected between the pin 1 and the pin 2, and a switch for opening the light-emitting diode 21 is connected between the pin 3 and the pin 4. The abutting portion 11 of the light guiding rod 10 abuts against the metal dome 22, and the pin 3 and the pin 4 communicate with each other, and the light emitting diode 21 emits light to illuminate the light guiding column 10.

Referring to FIG. 2, in a second preferred embodiment of the light-emitting diode switch of the present invention, six pins are drawn from the light-emitting diode 21 and the metal dome 22 in the casing 20. A light-emitting diode 21 having a first color is connected between the stitch 1 and the stitch 2, and a light-emitting diode 21 having a second color is connected between the stitch 3 and the stitch 4, and the stitch is connected. A switch for opening the light-emitting diode 21 is connected between the 5 and the pin 6. The light-emitting diode switch controls the light-emitting diode 21 by Pulse Width Modulation (PWM), such that the light-emitting diode 21 having the first color emits light, or the second The light-emitting diode 21 of the color emits light, or the light-emitting diode 21 having the first color and the light-emitting diode 21 having the second color simultaneously emit light to generate a third color.

Referring to FIG. 3, in a third preferred embodiment of the light-emitting diode switch of the present invention, six pins are drawn from the light-emitting diode 21 and the metal dome 22 in the casing 20. The housing 20 is provided with three light-emitting diodes 21 each having a red, green and blue color. The light-emitting diodes 21 are respectively connected between the stitch 1 and the stitch 4, between the stitch 2 and the stitch 4, and between the stitch 3 and the stitch 4. The stitch 4 is a common stitch. A switch for opening the light-emitting diode 21 is connected between the pin 5 and the pin 6. The light-emitting diode switch controls the light-emitting diode 21 by a pulse width modulation technique such that the light-emitting diode 21 emits red light, green light, blue light or other color light formed by a combination of the three colors.

Referring to FIG. 4 , in the above preferred embodiment of the light-emitting diode switch of the present invention, the top of the light guide column 10 can be set to different patterns according to the function indicated by the light-emitting diode switch. For example, power supply patterns, reduced patterns, added patterns, play patterns, pentagram patterns, and the like.

Referring to FIG. 5, in the above preferred embodiment of the light-emitting diode switch of the present invention, the heights of the light guide column 10 and the housing 20 can be variously changed according to actual conditions. For example, the height of the light guiding rod 10 is reduced, the height of the housing 20 is reduced, the height of the light guiding rod 10 is increased, and the like. The light guide column 10 can be a transparent light guide column, a half transparent light guide column, a mist light guide column, or a slightly dyed light guide column.

Referring to FIG. 6 , in the above preferred embodiment of the LED switch of the present invention, the LED switch can be packaged by a dual in-line package technology, and has vertical pins for connecting to On the board. The LED switch can also be mounted on a circuit board using surface mount technology with bent pins for connection to the circuit board.

In summary, the present invention is in accordance with the conditions of the invention patent application, and the patent application is filed according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art to the spirit of the present invention should be included in the following claims.

10‧‧‧Light guide

11‧‧‧Resistance

20‧‧‧shell

21‧‧‧Lighting diode

22‧‧‧Metal shrapnel

Claims (10)

A light-emitting diode switch comprising a casing, a light guiding column, a metal elastic piece which can be pressed by the light guiding column and at least one light emitting diode which emits light by conducting the metal elastic piece, The light guide column is movably embedded in the housing, the light guide column includes a curved bottom surface, the curved bottom surface includes a first end and a second end opposite to the first end, the light emitting two A gap is left between the pole body and the first end, and the second end is an abutting portion protruding from the first end and is in contact with the metal dome. The illuminating diode switch of claim 1, wherein the top of the light guiding column can be set to a different pattern according to a function indicated by the illuminating diode switch. The illuminating diode switch of claim 1, wherein the metal dome is located below the light guiding column. The illuminating diode switch of claim 1, wherein the bottom of the light guiding column is provided with an abutting portion for resisting the metal dome. The light-emitting diode switch of claim 1, wherein each of the light-emitting diodes emits monochromatic light, and the plurality of light-emitting diodes are connected in parallel to emit multi-color light. The illuminating diode switch of claim 5, wherein the illuminating diode switch is controlled by a pulse width modulation technique to emit polychromatic light. The illuminating diode switch of claim 1, wherein the illuminating diode switch encapsulates the illuminating diode and the push button switch using a dual in-line package technology. The illuminating diode switch of claim 1, wherein the illuminating diode switch is mounted on a circuit board using surface mount technology. The illuminating diode switch of claim 1, wherein the illuminating diode is located below the light guiding column. The light-emitting diode switch of claim 1, wherein the light guide column is a transparent light guide column.