TWI637290B - Keyswitch and keyboard thereof - Google Patents

Abstract

A button comprises a bottom plate, a key cap, a lifting mechanism connecting the bottom plate and the key cap, a light transmissive hollow elastic body, a diffusion particle, a light transmissive film circuit board, a light emitting diode circuit board and a light emitting diode. The light-transmissive hollow elastic body is disposed between the bottom plate and the keycap, and the bottom plate has an opening corresponding to the position of the transparent hollow elastic body. The diffusion particles are doped in the light transmissive hollow elastomer. The light transmissive film circuit board is disposed on the bottom plate and has a trigger switch. The light emitting diode circuit board is disposed under the bottom plate. The light emitting diode is electrically connected to the light emitting diode circuit board and disposed at a position corresponding to the opening. The light of the light-emitting diode is scattered through the opening to the diffusing particles in the light-transmissive hollow elastomer to cause scattering to be directed toward the keycap. When the keycap is pressed, the trigger switch is triggered by the light transmissive hollow elastomer or lifting mechanism.

Description

Button and its keyboard

The invention relates to a button and a keyboard thereof, in particular to a button for doping a diffusion particle in a transparent hollow elastic body and a keyboard thereof.

Please refer to FIG. 1 , which is a partial cross-sectional view of the prior art illuminated keyboard 1 . As shown in FIG. 1 , the illuminated keyboard 1 includes a bottom plate 10 , a thin film circuit board 12 , a plurality of buttons 14 , and a backlight device 16 . Each of the buttons 14 is disposed on the bottom plate 10. The thin film circuit board 12 is disposed between the bottom plate 10 and the plurality of buttons 14. When the user presses the button 14, the button 14 is depressed to trigger the trigger switch 13 of the film circuit board 12. And then execute the button function that the user wants to input. The backlight device 16 is disposed under the bottom plate 10 for providing a light source for emitting the illuminated keyboard 1. The backlight device 16 includes a light guide plate 18 and a light emitting diode 20, the light guide plate 18 is disposed under the bottom plate 10, and the light emitting diode 20 is disposed. It is disposed on one side of the light guide plate 18, so that the light emitted by the light-emitting diode 20 can be totally reflected in the light guide plate 18, and the light is emitted from the light guide plate 18 by using a reflection point (not shown) at the bottom of the light guide plate 18. And then projecting the button 14 in the direction of the bottom plate 10, thereby generating the effect of the button illumination.

However, due to the limited illumination angle and high directivity of the LED, the above-mentioned lateral illumination configuration tends to cause uneven brightness of the button illumination. Although the prior art has adopted a design in which the light emitting diode is directly disposed under the button to solve the above problem, the design also causes the trigger switch located above the light emitting diode to block the light emitting path of the light emitting diode. In other cases, the problem of uneven brightness of the button light is also caused.

Accordingly, it is an object of the present invention to provide a button and a keyboard thereof for doping a diffusion particle in a light transmissive hollow elastomer to solve the above problems.

According to an embodiment, the button of the present invention comprises a bottom plate, a key cap, a lifting mechanism, a light transmissive hollow elastic body, a plurality of diffusion particles, a light transmissive film circuit board, a light emitting diode circuit board, and a Light-emitting diode. The lifting mechanism is coupled to the bottom plate and the key cap, and the key cap is moved between the pressing position and an unpressed position relative to the bottom plate via the lifting mechanism. The light-transmissive hollow elastic body is disposed between the bottom plate and the key cap for providing elastic force to move the keycap to the unpressed position, and the bottom plate has a first opening corresponding to the position of the transparent hollow elastic body. The plurality of diffusion particles are doped in the light transmissive hollow elastomer. The light transmissive film circuit board is disposed on the bottom plate and has a trigger switch. The LED circuit board is disposed under the bottom plate. The light-emitting diode is electrically connected to the light-emitting diode circuit board and disposed at a position corresponding to the first opening, and is configured to emit light through the control of the light-emitting diode circuit board, and the light of the light-emitting diode Scattering is generated by the plurality of diffusing particles incident on the transparent hollow elastomer through the first opening to be directed toward the keycap. The light transmissive hollow elastomer or the lifting mechanism triggers the trigger switch when the keycap is pressed to the pressing position.

According to another embodiment, the keyboard of the present invention includes a backplane and a plurality of buttons. A plurality of buttons are disposed on the bottom plate, and at least one of the plurality of buttons comprises a key cap, a lifting mechanism, a transparent hollow elastic body, a plurality of diffusing particles, a transparent film circuit board, and a light emitting diode The body board, and a light emitting diode. The lifting mechanism is coupled to the bottom plate and the key cap, and the key cap is moved between the pressing position and an unpressed position relative to the bottom plate via the lifting mechanism. The light-transmissive hollow elastic body is disposed between the bottom plate and the key cap for providing elastic force to move the keycap to the unpressed position, and the bottom plate has a first opening corresponding to the position of the transparent hollow elastic body. The plurality of diffusion particles are doped in the light transmissive hollow elastomer. The light transmissive film circuit board is disposed on the bottom plate and has a trigger switch. The LED circuit board is disposed under the bottom plate. The light-emitting diode is electrically connected to the light-emitting diode circuit board and disposed at a position corresponding to the first opening, and is configured to emit light through the control of the light-emitting diode circuit board, and the light of the light-emitting diode Scattering is generated by the plurality of diffusing particles incident on the transparent hollow elastomer through the first opening to be directed toward the keycap. The light transmissive hollow elastomer or the lifting mechanism triggers the trigger switch when the keycap is pressed to the pressing position.

Through the above design, when the light emitting diode emits light through the control of the light emitting diode circuit board, the light of the light emitting diode is generated by the plurality of diffusing particles incident into the light transmitting hollow elastic body through the first opening. The scattering is uniformly directed to the keycap, so that the present invention can effectively solve the illuminating by utilizing the diffusing particles doped in the transparent hollow elastic body to scatter the light of the light emitting diode to be directed to the keycap. The keyboard is susceptible to the uneven brightness of the key cap caused by the limited illumination angle and high directivity of the LED, thereby greatly improving the uniformity of the brightness of the keys of the keyboard.

The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.

Please refer to FIG. 2 and FIG. 3, FIG. 2 is a perspective view of a keyboard 100 according to an embodiment of the present invention, and FIG. 3 is a partial cross-sectional view of the keyboard 100 of FIG. 2 along a section line AA, such as As shown in FIG. 2 and FIG. 3, the keyboard 100 includes a bottom plate 102 and a plurality of buttons 104. The plurality of buttons 104 are disposed on the bottom plate 102 for the user to press to perform a function desired by the user. It should be noted that the keyboard 100 can be preferably applied to a portable electronic device (such as a notebook computer keyboard or a folding keyboard device) generally having an opening and closing mechanism composed of an upper cover and a lower casing for the user. Pressing to perform the function that the user wants to input, but not limited to this.

The button illumination design proposed by the present invention can be applied to at least one of the plurality of buttons 104, the number of which is dependent on the actual application of the keyboard 100. For the sake of simplicity, the following is for one of the buttons. The design of the button 104 is described. As for other structural designs of the button 104 of the same design, it can be deduced. 2 and 3, the button 104 includes a key cap 106, a lifting mechanism 108, a light transmissive hollow elastic body 110, a plurality of diffusion particles 112, a light transmissive thin film circuit board 114, and a light emitting diode circuit board 116, and Light emitting diode 118. The lifting mechanism 108 is disposed between the bottom plate 102 and the keycap 106. The key cap 106 is moved between the pressing position and the unpressed position relative to the bottom plate 102 via the lifting mechanism 108. In this embodiment, the lifting mechanism 108 is preferably used. The ground is a scissor structure. For example, the lifting mechanism 108 can include a first support member 109 and a second support member 111. The first support member 109 is movably coupled to the keycap 106 and the bottom plate 102, and the second support member The 111 series is movably connected to the keycap 106 and the bottom plate 102 and is pivotally connected to the first support member 109. Thereby, the key cap 106 can be relatively designed through the first support member 109 and the second support member 111. The bottom plate 102 is moved between a pressed position and an unpressed position.

In the pressing trigger design of the keyboard 100, as shown in FIG. 3, the transparent hollow elastic body 110 is disposed between the bottom plate 102 and the keycap 106, and the bottom plate 102 has a first opening corresponding to the position of the transparent hollow elastic body 110. 120, the light-transmissive film circuit board 114 is disposed on the bottom plate 102 and has a trigger switch 122 corresponding to the position of the light-transmitting hollow elastic body 110, whereby when the key cap 106 is pressed by an external force, the light-transmitting hollow elastic body 110 is subjected to The compression elastic deformation is to trigger the trigger switch 122 on the transparent film circuit board 114 to generate a corresponding trigger signal. On the other hand, when the external force is released, the light transmissive hollow elastic body 110 provides the elastic driving keycap 106 to move to the unpressed position as shown in FIG. 3, thereby producing the effect that the keycap 106 can be automatically returned.

As for the illumination design of the button 104, as can be seen from FIG. 3, a plurality of diffusion particles 112 are doped in the transparent hollow elastic body 110, and the LED substrate 116 is disposed under the bottom plate 102, and the light emitting diode is The body 118 is electrically connected to the LED board 116 and disposed in the first opening 120. The LEDs 118 are preferably disposed in the bare crystal form (but not limited thereto). On the body board 116. Through the above configuration, when the light emitting diode 118 emits light through the control of the light emitting diode circuit board 116, the light of the light emitting diode 118 is incident into the transparent hollow elastic body 110 through the first opening 120. The diffusion particles 112 are scattered to uniformly strike the keycap 106.

In this way, the present invention utilizes the diffusion particles doped in the transparent hollow elastomer to scatter the light of the LED to be directed toward the keycap, thereby effectively solving the problem that the illuminated keyboard is susceptible to the LED. The brightness of the keycap caused by the influence of the illuminating angle and the high directivity is uneven, thereby greatly improving the uniformity of the brightness of the keys of the keyboard. In practical applications, the diffusing particles 112 are preferably photoexcited phosphor particles. For example, the light emitting diodes 118 may be blue light emitting diodes and the diffusing particles 112 may be correspondingly Yttrium Aluminium Garnet (YAG) yellow fluorescent powder (but not limited to this, it can also be designed with other fluorescent particles excited by light, such as LED diode 118 can be UV light II The polar body and the diffusing particles 112 are correspondingly red, green, blue (RGB) color fluorescent particles, etc., whereby a plurality of diffusing particles are emitted when the light of the light emitting diode 118 is incident on the plurality of diffusing particles 112. 112 is excited by light to produce a corresponding color light (such as white light, etc.).

It is worth mentioning that, in order to prevent the trigger switch located above the light-emitting diode from blocking the light-emitting path of the light-emitting diode, the present invention can adopt the design of triggering the trigger switch by the lifting mechanism. For example, please refer to 4 is a partial cross-sectional view of a keyboard 200 according to another embodiment of the present invention. The components described in this embodiment are identical to the component numbers described in the above embodiments, and represent similarities. The function or structure, the related description thereof will not be described here. As shown in FIG. 4, the keyboard 200 includes a bottom plate 102 and a plurality of buttons 202. The plurality of buttons 202 are disposed on the bottom plate 102 for the user to press and perform a function that the user desires to input. The button 202 includes a key cap 106. The lifting mechanism 204, the transparent hollow elastic body 110, the plurality of diffusion particles 112, the transparent thin film circuit board 206, the light emitting diode circuit board 116, and the light emitting diode 118, the lifting mechanism 204 is disposed on the bottom plate 102 and the key cap Between 106, the lifting mechanism 204 can include a first support 208 and a second support 111. The first support 208 is movably coupled to the keycap 106 and the bottom plate 102 and can have trigger bumps 209 (but is not subject to this) The invention may also adopt a design in which the triggering bumps are formed at other positions of the lifting mechanism. For example, the triggering bumps may be formed at a position where the first supporting member and the second supporting member are pivotally connected or formed in the second position. The second support member 111 is movably connected to the keycap 106 and the bottom plate 102 and is pivotally connected to the first support member 208. The transparent film circuit board 206 is disposed on the bottom plate 102 and corresponding to the trigger bump. Position of 209 There is a trigger switch 207 and a second opening 210 is preferably formed at a position corresponding to the first opening 120 (but is not limited thereto).

Through the above design, when the key cap 106 is pressed by the external force, the triggering bump 209 on the first support member 208 is pressed down to trigger the trigger switch 207 on the transparent film circuit board 206 as the key cap moves downward. Generate a corresponding trigger signal. In addition, when the light emitting diode 118 emits light through the control of the light emitting diode circuit board 116, the light of the light emitting diode 118 directly passes through the first opening 120 and the first portion without being blocked. The two openings 210 are incident on the plurality of diffusing particles 112 in the transparent hollow elastic body 110 to generate scattering to uniformly illuminate the key cap 106. Thus, the present invention can further improve the brightness uniformity of the keys of the keyboard. . The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

1‧‧‧ illuminated keyboard

10, 102‧‧‧ bottom plate

12‧‧‧Film board

13,122, 207‧‧‧ trigger switch

14, 104, 202‧‧‧ buttons

16‧‧‧Backlight

18‧‧‧Light guide

20, 118‧‧‧Lighting diode

100, 200‧‧‧ keyboard

106‧‧‧Key Cap

108, 204‧‧‧ Lifting mechanism

109, 208‧‧‧ first support

110‧‧‧Transparent hollow elastomer

111‧‧‧second support

112‧‧‧Diffusion particles

114, 206‧‧‧Transparent thin film circuit board

116‧‧‧Lighting diode board

120‧‧‧First opening

209‧‧‧trigger bump

210‧‧‧Second opening

Figure 1 is a partial cross-sectional view of a prior art illuminated keyboard. 2 is a perspective view of a keyboard according to an embodiment of the present invention. Figure 3 is a partial cross-sectional view of the keyboard of Figure 2 taken along section line A-A. 4 is a partial cross-sectional view of a keyboard according to another embodiment of the present invention.

Claims (12)

A button comprising: a bottom plate; a key cap; a lifting mechanism coupled to the bottom plate and the key cap, the key cap moving between the pressing position and an unpressed position relative to the bottom plate via the lifting mechanism a light-transmissive hollow elastic body disposed between the bottom plate and the keycap for providing elastic force to move the keycap to the unpressed position, the bottom plate having a first position corresponding to the position of the transparent hollow elastic body a plurality of diffusing particles doped in the light transmissive hollow elastomer; a light transmissive film circuit board disposed on the bottom plate and having a trigger switch; a light emitting diode circuit board disposed on Under the bottom plate; and a light emitting diode electrically connected to the light emitting diode circuit board and disposed at a position corresponding to the first opening for emitting light through the control of the light emitting diode circuit board The light of the light emitting diode is scattered through the first opening to the plurality of diffusing particles in the light transmissive hollow elastomer to cause scattering to be directed to the key cap; wherein when the key cap is pressed to the pressing position When the light-transmitting member or the hollow elastic lifting mechanism triggers the trigger switch. The button of claim 1, wherein the plurality of diffusing particles are photoexcited phosphor particles, and the light of the light emitting diode is incident on the plurality of diffusing particles, so that the plurality of diffusing particles are excited by the light. Glowing. The button of claim 2, wherein the light emitting diode system is a blue light emitting diode, and the plurality of diffusing particles are Yttrium Aluminium Garnet (YAG) yellow fluorescent powder particles. The button of claim 2, wherein the light emitting diode system is an ultraviolet light emitting diode, and the plurality of diffusing particles are red, green and blue (RGB) color fluorescent particles. The button of claim 1, wherein the transparent film circuit board forms a second opening corresponding to the first opening, and the light of the LED passes through the first opening and the second The opening is incident on the light transmissive hollow elastomer. The button of claim 1, wherein the light emitting diode system is disposed on the light emitting diode circuit board in a bare crystal form. A keyboard comprising: a bottom plate; and a plurality of buttons disposed on the bottom plate, at least one of the plurality of buttons comprising: a key cap; a lifting mechanism coupled to the bottom plate and the key cap, The key cap is moved between the pressing position and the unpressed position relative to the bottom plate via the lifting mechanism; a light transmissive hollow elastic body disposed between the bottom plate and the key cap for providing elastic force to drive the key The cap moves to the unpressed position, the bottom plate has a first opening corresponding to the position of the transparent hollow elastic body; a plurality of diffusion particles doped in the transparent hollow elastic body; a transparent film circuit board, The device is disposed on the bottom plate and has a trigger switch; a light emitting diode circuit board disposed under the bottom plate; and a light emitting diode electrically connected to the light emitting diode circuit board and disposed on the pair At a position of the first opening, the light is emitted through the control of the LED board, and the light of the LED is incident into the transparent hollow elastic body through the first opening. Generating a plurality of diffusion particles scattered directed to the keycap; wherein when the keycap is pressed into the pressing position, the transparent hollow elastomer or the lifting mechanism to trigger the trigger switch. The keyboard of claim 7, wherein the plurality of diffusing particles are photoexcited phosphor particles, and the light of the light emitting diode is incident on the plurality of diffusing particles, so that the plurality of diffusing particles are excited by the light. Glowing. The keyboard of claim 8, wherein the light emitting diode system is a blue light emitting diode, and the plurality of diffusing particles are yttrium aluminum garnet yellow phosphor particles. The keyboard of claim 8, wherein the light emitting diode system is an ultraviolet light emitting diode, and the plurality of diffusing particles are red, green and blue phosphor particles. The keyboard of claim 7, wherein the transparent film circuit board forms a second opening corresponding to the first opening, and the light of the LED passes through the first opening and the second The opening is incident on the light transmissive hollow elastomer. The keyboard of claim 7, wherein the light emitting diode system is disposed on the light emitting diode circuit board in a bare crystal form.