CN1432892A

CN1432892A - Light-emitting keyboard

Info

Publication number: CN1432892A
Application number: CN 02102020
Authority: CN
Inventors: 江治湘; 叶亮达
Original assignee: Darfon Electronics Corp
Current assignee: Darfon Electronics Corp
Priority date: 2002-01-17
Filing date: 2002-01-17
Publication date: 2003-07-30
Anticipated expiration: 2022-01-17
Also published as: CN1280695C

Abstract

The present invention provides an light-emitting keyboard including keyboard part and back lighting unit. The keyboard part has one base board and at least one button, which is set on the base board and capable of moving up and down relative to the base board. The back light unit is set below the keyboard part to provide light source to the keyboard part. The light-emitting keyboard of the present invention has improved keyboard light emitting effect and proper and proper thickness.

Description

Illuminated keyboard

Technical field

The present invention relates to a kind of illuminated keyboard, particularly relate to a kind of illuminated keyboard that not only can improve illumination effect and can take into account thickness requirement.

Background technology

Popularize along with computerized, computer might use under various environment, for example in the occasion of insufficient light, in order to adapt to the demand, just proposed a kind of can luminous voluntarily keyboard.

Fig. 1 is a U.S. Patent number 6,284, and the general configuration of No. 988 existing illuminated keyboards is provided with a back lighting device 15 in keypad portion 11; Know clearly it, keypad portion 11 has a base plate 111, on base plate 111, be provided with a circuit board 112, and on circuit board 112, be provided with at least one flexible member 113a, and on flexible member 113a, be provided with corresponding keycap 114, and between keycap 114 and base plate 111, be provided with a scissor structure 115, these scissor structure 115 1 ends are connected on the protruding member of base plate 111 in rotatable mode of sliding, the other end is connected in a side of keycap 114, and can allow keycap 114 relative base plates 111 to move up and down; Back lighting device 15 is an electroluminescent panel EL (electroluminescent device).

Existing illuminated keyboard 10 is as above-mentioned formation, because back lighting device 15 is arranged at circuit board 112 tops in the button portion 11, the keycap 114 that need to cooperate button portion 11 combines with the base plate 111 of button portion 11 and broken hole thereon, therefore be located at also need on the back lighting device 15 of circuit board 112 tops the same with circuit board 112, broken hole thereon, this not only makes complex manufacturing technologyization, also illumination effect is impacted simultaneously.

Summary of the invention

The objective of the invention is to provides a kind of illuminated keyboard for addressing the above problem, and it not only can improve illumination effect, also can take into account the requirement of its thickness simultaneously.

The object of the present invention is achieved like this, and a kind of illuminated keyboard promptly is provided, and comprising: a keypad portion, have a base plate and at least one button, and wherein this button is arranged on this base plate in the mode that this base plate relatively moves up and down; And a back lighting device, be arranged at this keypad portion below, can provide this keypad portion light source from this keypad portion below by this back lighting device.

The present invention also provides a kind of illuminated keyboard, comprising: a leaded light base plate which is provided with the fixed sturcture of a plurality of integrated projections; At least one keycap is arranged on this leaded light base plate; One bindiny mechanism, an end is connected in this fixed sturcture, the other end is connected in this keycap, make this keycap relatively this leaded light base plate move up and down; And a light source, be arranged at a precalculated position of this keyboard, to provide light to this leaded light base plate and make this illuminated keyboard shinny.

Further, in the present invention, a kind of illuminated keyboard that is provided, comprise keypad portion and back lighting device, keypad portion has a base plate, be located at the circuit board on the base plate, and be located at least one flexible member between base plate and the circuit board, and on flexible member, be provided with corresponding keycap, and between keycap and base plate, be provided with a scissor structure, scissor structure one end is connected on the protruding member of base plate in rotatable mode of sliding, the other end is connected in a side of keycap, and can allow the relative base plate of keycap to move up and down, and back lighting device is arranged at the keypad portion below, back lighting device can provide the keypad portion light source from the keypad portion below thus.

In a preferred embodiment, this back lighting device has light guide plate, reflector and light source, and light is advanced in light guide plate and reflexed on the keypad portion via reflector.

In a preferred embodiment, keypad portion also has a plastic film, and flexible member is arranged on the plastic film, and base plate is provided with first through hole in the position of corresponding keycap, and light guide plate is provided with a plurality of photo-emission parts.

In another preferred embodiment, the base plate of keypad portion is with the fixed sturcture of the one-body molded a plurality of projections of optical material.

In another preferred embodiment, the light source of back lighting device is arranged on the circuit board.

In another preferred embodiment, have at least one second through hole on the base plate of keypad portion, and the light source of backlight is arranged on the circuit board in the mode of passing base plate.

Again, preferably, light source is LED.

In another preferred embodiment, reflector is arranged at the below of light guide plate.

In another preferred embodiment, when the base plate of keypad portion was one-body molded with optical material, reflector was arranged at the below of keypad portion.

In another preferred embodiment, back lighting device also comprises at least one solar panel, be arranged between light guide plate and the keypad portion, and solar panel and plastic film is one-body molded.

In another preferred embodiment, solar panel and circuit board are one-body molded.

In another preferred embodiment, illuminated keyboard also comprises an astigmatism plate, be arranged between light guide plate and the keypad portion, and astigmatism plate and plastic film is one-body molded.

In another preferred embodiment, astigmatism plate and circuit board are one-body molded.

In another preferred embodiment, when light source is located on the circuit board and be positioned at the side of light guide plate, light source away from light guide plate around a covering is set, in order to guarantee the light emission direction of light source.

In a preferred embodiment, this back lighting device be an electroluminescent panel (electroluminescent sheet, EL).

In a preferred embodiment, this back lighting device has an optical fiber sheet material and a light source, and light is advanced in optical fiber and reflexed on the keypad portion.

Description of drawings

Fig. 1 is the synoptic diagram of existing illuminated keyboard;

Fig. 2 is the synoptic diagram of illuminated keyboard of the present invention;

Fig. 3 is the cut-open view of illuminated keyboard of the present invention;

Fig. 4 a, Fig. 4 b are the cut-open view of illuminated keyboard of the present invention, in the drawings each element of display backlight device;

Fig. 5 a ~ Fig. 5 e is the set-up mode synoptic diagram of light source of the present invention;

Fig. 6 is the synoptic diagram of another embodiment of illuminated keyboard of the present invention;

Fig. 7 is the synoptic diagram of another embodiment (optical fiber sheet material) of back lighting device.

Embodiment

Illuminated keyboard 20 of the present invention comprises a keypad portion 22 and a back lighting device 23 as shown in Figure 2; It should be noted in the keyboard of reality, also to be provided with other elements such as upper casing, drain pan,, and, do not draw at this for simplicity of illustration because other elements and existing keyboard type are seemingly.

Keypad portion 22 is arranged on the drain pan (not shown) of keyboard, it has a base plate 222, one film circuit board (membrane circuit board) 223, at least one keycap 224, at least one flexible member 221 and at least one scissor structure 225, with reference to figure 3, base plate 222 is provided with the fixed sturcture 2221 of a plurality of projections, one end of scissor structure 225 is connected on the fixed sturcture 2221 of base plate 222, the other end is connected in the bottom side of keycap 224, so that keycap 224 relatively base plate 222 move up and down, flexible member 221 is arranged between film circuit board 223 and the keycap 224, with to upper support keycap 224, base plate 222 is provided with first through hole 2222 at relative resilient element 221 places, and selectively fill with a transparent spacers 226, film circuit board 223 is with the clear plastic material, made as PE (polyester).In addition, flexible member 221 also can be connected in the last convenience with the assembling of increase keyboard of a plastic film (Mylar) 221a, or with a plurality of flexible member 221 one-body molded one-tenth one resilient element, to be arranged on the film circuit board 223.When not using transparent spacers 226 to fill first through hole 2222, only need be thickeied the thickness of film circuit board 223 a little and get final product.

Refer again to Fig. 2, back lighting device 23 is arranged under the keypad portion 22, and has a light guide plate 231, a reflector 232 and a light source 233, can provide keypad portion 22 required light source from keypad portion 22 belows by this back lighting device 23.

As shown in Figure 2, light guide plate 231 bottoms are provided with the corresponding photo-emission part 231a of a plurality of and transparent spacers 226, the light that are emitted in the light guide plate 231 from light source 233 are reflected when meeting photo-emission part 231a, and reflex on the keypad portion 22 and make the illumination effect of button better.The mode that photo-emission part 231a can print is printed in light guide plate 231 bottoms with reflection spot, also can integrated mode takes shape in light guide plate 231 bottoms and becomes a coarse reflecting surface.Wherein, photo-emission part 231a is less near light source place area, and is big more away from light source part area more.

Again, consider based on thickness, can light guide plate and base plate is one-body molded, to reduce thickness, know clearly it, the base plate 222 of keypad portion 22 can be made with optical material and with the fixed sturcture 2221 on the injection molding moulding base plate 222, the light guide plate material is as Acrylic, PC (PolyCarbonate) or ABS.

With reference to figure 4a, illuminated keyboard also can comprise a solar panel 234 and an astigmatism plate 235, is arranged at respectively between light guide plate 231 and the keypad portion 22, and the solar panel material is the PC film, astigmatism plate material such as PET film.

Again, consider, flexible member 221 can be connected on the astigmatism plate 235 based on thickness, and be placed between film circuit board 223 and the keycap 224, solar panel 234 is one-body molded with film circuit board 223, with minimizing thickness, shown in Fig. 4 b.Or flexible member 221 made and is connected on the astigmatism plate 235 to reach the effect of astigmatism with the transparent rubber material.

Again, though not shown, can according to circumstances astigmatism plate is omitted, flexible member is connected on the solar panel, or omits solar panel, film circuit board and astigmatism plate is one-body molded.

With reference to figure 3, Fig. 5 a, Fig. 5 b, light source 233 is arranged on the film circuit board 223 in the mode that is positioned at light guide plate 231 sides, and be provided with a covering 236 in direction away from light guide plate 231, light source can be imported in the light guide plate 231 fully, can set up extra mechanism by this mode light source 233 is set.

Again, with reference to figure 5c, Fig. 5 d, Fig. 5 e, for the illumination effect that makes keyboard better, can on light guide plate 231, form a plurality of depressed part 231b, base plate 222 is provided with the corresponding second through hole 222a in the place of relative this each depressed part 231b, light source 233 is arranged at film circuit board 223 belows, and in the mode of the through hole 222a that passes base plate 222 and make light source 233 can be arranged in depressed part 231b.

Again, to can be LED (light emitting diode) be preferably to light source 233.

Refer again to Fig. 2, reflector 232 is arranged at light guide plate 231 belows; So that the light in the light guide plate 231 are reflexed on the keypad portion 22, again, if during light guide plate 231 bottom straight forming photo-emission parts, the setting that then can omit reflector.

Fig. 6 is another embodiment of illuminated keyboard of the present invention, the back lighting device of different with first embodiment is present embodiment adopts an electroluminescent panel EL sheet (electroluminescentdevice) 240, and this electroluminescent panel 240 is electrically connected to film circuit board 223 or is electrically connected on the circuit of keyboard.

Fig. 7 is another embodiment of back lighting device, it is connected in a plurality of optical fiber 250 and forms an optical fiber sheet material 25 on the sheet material 251, one end of these optical fiber is incorporated into a light source 252, and this light source 252 is electrically connected on the circuit board of keyboard to provide light to optical fiber, so that keyboard is shinny.

Again, in order to adapt to other demand, also film circuit board 223 can be arranged under the base plate 222, flexible member 221 is arranged on the film circuit board 223 and passes base plate 222 to upper support keycap 224.Or flexible member 221 is arranged on the base plate, when keycap 224 stressed pressing down, flexible member is subjected to the switch of keycap effect distortion downwards and conflict film circuit board, produces corresponding signal.

By formation of the present invention, can obtain following advantage:

1. because back lighting device is arranged at button subordinate side, do not need equally on the light guide plate with circuit board, broken hole thereon can make manufacture craft simplify, and can improve illumination effect simultaneously;

2. be located at the film circuit board of keypad portion when light source, additional mechanism then needn't be set light source is set.In addition, when in the light guide plate some depressed parts being set, can making light source be arranged in the depressed part of light guide plate, and make the illumination effect of keyboard better;

3. can consider with base plate 222 with optical material make, flexible member is connected in astigmatism plate or solar panel on, film circuit board makes with light-concentrating material, to reduce the illuminated keyboard integral thickness; And

4. base plate is provided with through hole at corresponding flexible member place, can lower the keyboard overall weight.

Though disclosed the present invention in conjunction with above preferred embodiment; yet it is not in order to limit the present invention; any those skilled in the art can do a little change and retouching, so protection scope of the present invention should be with being as the criterion that claim was defined without departing from the spirit and scope of the present invention.

Claims

1. illuminated keyboard comprises:

One keypad portion has a base plate and at least one button, and wherein this button is arranged on this base plate in the mode that this base plate relatively moves up and down; And

One back lighting device is arranged at this keypad portion below, can provide this keypad portion light source from this keypad portion below by this back lighting device.

2. illuminated keyboard as claimed in claim 1, wherein this base plate is provided with one first through hole with respect to this button place.

3. illuminated keyboard as claimed in claim 2, wherein fill with transparency material this first through hole.

4. as claim 2 or 3 described illuminated keyboards, wherein this back lighting device is an electroluminescent panel (electroluminescent sheet).

5. as claim 2 or 3 described illuminated keyboards, wherein this back lighting device also comprises an optical fiber sheet material and a light source, and this optical fiber sheet material is arranged on the sheet material by a plurality of optical fiber and forms.

6. as claim 2 or 3 described illuminated keyboards, wherein this keypad portion also comprises a plastic film, and this plastic film is provided with at least one flexible member.

7. illuminated keyboard as claimed in claim 6, wherein this back lighting device comprises that also one has the light guide plate and a light source of reflecting part, this light source is arranged at an appropriate position of this keyboard.

8. illuminated keyboard as claimed in claim 7, wherein this keypad portion also has a circuit board, and it is arranged between this button and this base plate, and this light source is arranged on this circuit board.

9. illuminated keyboard as claimed in claim 7, wherein this keypad portion also has a circuit board, and it is arranged between this back lighting device and this base plate, and this light source is arranged on this circuit board.

10. illuminated keyboard as claimed in claim 7, wherein this base plate also is provided with at least one second through hole, and this light source is arranged on this circuit board in the mode of passing this second through hole.

11. illuminated keyboard as claimed in claim 7, wherein this light source is LED.

12. illuminated keyboard as claimed in claim 7, wherein this reflecting part is a reflector, and this reflector is arranged under this light guide plate.

13. illuminated keyboard as claimed in claim 7, wherein this reflecting part is formed in one in the coarse reflecting surface of this light guide plate bottom.

14. illuminated keyboard as claimed in claim 7, wherein this reflecting part is the reflecting surface that is printed in this light guide plate bottom.

15. illuminated keyboard as claimed in claim 7, wherein this illuminated keyboard also comprises at least one solar panel, is arranged between this light guide plate and this keypad portion.

16. illuminated keyboard as claimed in claim 6, wherein this plastic film is made with optically focused sheet material.

17. illuminated keyboard as claimed in claim 8 or 9, wherein this circuit board is made with optically focused sheet material.

18. illuminated keyboard as claimed in claim 7, wherein this illuminated keyboard also comprises an astigmatism plate, is arranged between this light guide plate and this keypad portion.

19. illuminated keyboard as claimed in claim 6, wherein this plastic film is made with astigmatic sheet material.

20. illuminated keyboard as claimed in claim 8 or 9, wherein this circuit board is made with astigmatic sheet material.

21. an illuminated keyboard comprises:

One leaded light base plate which is provided with the fixed sturcture of a plurality of integrated projections;

At least one keycap is arranged on this leaded light base plate;

One bindiny mechanism, an end is connected in this fixed sturcture, the other end is connected in this keycap, make this keycap relatively this leaded light base plate move up and down; And

One light source is arranged at a precalculated position of this keyboard, to provide light to this leaded light base plate and make this illuminated keyboard shinny.

22. illuminated keyboard as claimed in claim 21 also comprises:

One circuit board is arranged between this leaded light base plate and this keycap, and this light source is electrically connected on this circuit board.

23. illuminated keyboard as claimed in claim 21 also comprises:

One circuit board, this leaded light base plate is provided with at least one depressed part, and this power supply is arranged in this depressed part in the mode that is electrically connected on this circuit board.