CN201812716U - Light-emitting keyboard device - Google Patents
Light-emitting keyboard device Download PDFInfo
- Publication number
- CN201812716U CN201812716U CN2010205528463U CN201020552846U CN201812716U CN 201812716 U CN201812716 U CN 201812716U CN 2010205528463 U CN2010205528463 U CN 2010205528463U CN 201020552846 U CN201020552846 U CN 201020552846U CN 201812716 U CN201812716 U CN 201812716U
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- light
- keyboard device
- light sources
- illuminated keyboard
- base plate
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Abstract
The utility model relates to a light-emitting keyboard device, comprising a keyboard part, a light guide plate and a current mirror circuit, wherein the keyboard part is provided with a bottom plate and a plurality of press keys, and the press keys are respectively provided with a light penetrating area and are arranged on the bottom plate in a way of doing up-and-down motion relative to the bottom plate. The light guide plate is arranged below the keyboard part, and is provided with a plurality of hollow parts used for holding a plurality of light sources. The current mirror circuit ensuring that current values of the light sources are approximately equal is coupled with the light sources. By using the characteristic that the current mirror circuit copies the currents, the light-emitting keyboard device is not influenced by the putting position of the light sources to make the currents for driving the light sources are equal roughly no matter how far the light sources from the current mirror circuit are.
Description
Technical field
The utility model relates to a kind of illuminated keyboard, refers to a kind of illuminated keyboard that utilizes current mirror to drive a plurality of light sources especially.
Background technology
In the prior art, the circuit of the required driving light source of illuminated keyboard device with silver-colored line layout on film (membrane).Because the resistance value of silver-colored line is decided by the length of silver-colored line and the area of silver-colored line tangent plane, that is the resistance value of silver-colored line is directly proportional with the length of silver-colored line and the area of silver-colored line tangent plane is inversely proportional to.So, apart from illuminated keyboard device power supply unit light source far away more, the resistance value of the silver-colored line between light source and power supply unit is big more, apart from the near more light source of illuminated keyboard device power supply unit, the resistance value of the silver-colored line between light source and power supply unit is more little, cause the light source near brighter apart from power supply unit, and the light source darker phenomenon far away apart from power supply unit.
In addition, when printing silver-colored line between light source and power supply unit with metal cream on film, the length and the thickness of silver-colored line are wayward, make the resistance difference of every bullion line, also can cause light source between the phenomenon of brightness disproportionation.
The utility model content
An embodiment of the present utility model provides a kind of illuminated keyboard device, and it comprises keypad portion, light guide plate and current mirroring circuit.This keypad portion has base plate and a plurality of button, and wherein these a plurality of buttons have transparent area respectively, and these a plurality of buttons are arranged on this base plate in the mode that this base plate relatively moves up and down; This light guide plate is arranged at this keypad portion below, and this light guide plate has in order to hold a plurality of depressed parts of a plurality of light sources; Make the equal current mirroring circuit of current value of these a plurality of light sources, be coupled to this a plurality of light sources.
According to described illuminated keyboard device, this illuminated keyboard device also comprises film, and wherein these a plurality of light sources and this current mirroring circuit all are arranged on this film.
According to described illuminated keyboard device, this current mirroring circuit also comprises a plurality of connection lines, and these a plurality of connection lines couple this a plurality of light sources, and these a plurality of connection lines are printed on this film with metal cream.
According to described illuminated keyboard device, these a plurality of light sources are light-emittingdiode.
According to described illuminated keyboard device, this base plate is provided with through hole respectively with respect to this a plurality of buttons place, and the light of this light source also passes through the transparent area of this button by this through hole.
According to described illuminated keyboard device, the base plate that this base plate transparent material is made, the light of this light source is by this base plate and by these transparent areas.
A kind of illuminated keyboard device provided by the utility model utilizes the characteristic of current mirroring circuit replica current, no matter the light source distance current mirroring circuit how far, that is is not subjected to the influence of light source putting position, all can make the electric current of driving light source equate haply.In addition, this illuminated keyboard device also has following advantage: when light source is located at the film circuit board of keypad portion, additional mechanism then needn't be set light source is set; When in the light guide plate a plurality of depressed part being set, can making light source be arranged in the depressed part of light guide plate, and make the illumination effect of keyboard better.
Can be further understood by following description of drawings and embodiment detailed description in advantage of the present utility model and spirit.
Description of drawings
Figure 1A illustrates the illuminated keyboard schematic representation of apparatus for an embodiment of the present utility model.
Figure 1B is coupled to the schematic diagram of a plurality of light sources for the utility model current mirroring circuit and a plurality of connection lines.
Fig. 2 is the schematic diagram of the relativeness between button, light guide plate and the film of Fig. 1 illuminated keyboard device.
Fig. 3 illustrates the illuminated keyboard schematic representation of apparatus for another embodiment of the present utility model.
Embodiment
Please refer to Figure 1A and Fig. 2, Figure 1A is the schematic diagram of the relativeness of 108 of the button 1024, light guide plate 104 of illuminated keyboard device 100 and films for an embodiment of the present utility model illustrates the schematic diagram of illuminated keyboard device 100, Fig. 2.Illuminated keyboard device 100 comprises keypad portion 102, light guide plate 104 and current mirroring circuit 106.Keypad portion 102 has base plate 1022, a plurality of button 1024 and film circuit board 1026, and a plurality of buttons 1024 are arranged on the base plate 1022 in the mode that base plate 1022 relatively moves up and down.Light guide plate 104 is arranged at keypad portion 102 belows, and light guide plate 104 has a plurality of depressed parts 1042, and in order to hold a plurality of light sources 1046, wherein a plurality of light sources 1046 are a plurality of light-emittingdiodes.Please refer to Figure 1B, Figure 1B is coupled to the schematic diagram of a plurality of light sources 1046 for explanation current mirroring circuit 106 and a plurality of connection lines 1062.Shown in Figure 1B, current mirroring circuit 106 comprises reference resistance R, electric crystal 1064,1066,1068,1070,1072.Reference resistance R determines reference current IREF according to the lock source voltage VGS of service voltage VCC and electric crystal 1064.Current mirroring circuit 106 can see through electric crystal 1066,1068,1070,1072 and duplicate reference current IREF, and electric crystal 1066,1068,1070,1072 is coupled to a plurality of light sources 1046 through a plurality of connection lines 1062, therefore, current mirroring circuit 106 can make the current value that drives a plurality of light sources 1046 equate that haply wherein a plurality of connection lines 1062 are printed on the film 108 with the metal cream of argentiferous.Therefore, utilize the characteristic of current mirroring circuit 106 replica current,, that is be not subjected to the influence of light source 1046 putting positions, all can make the electric current of driving light source 1046 equate haply no matter apart from current mirroring circuit 106 how far light source 1046.In addition, shown in Figure 1A, depressed part 1042 has four, and light source 1046 also has four and connection line 1062 also to have four.But the utility model is not limited to this, and the number of depressed part 1042, light source 1046 and connection line 1062 only is used for illustrating the utility model, makes the utility model clearer after illustrating.
Referring again to the 2nd figure, button 1024 has keycap 10242, transparent elastomer 10244 and a scissor structure 10246.Keycap 10242 is made of transparent material, polycarbonate resin (Polycarbonate for example, PC) or polymethyl methacrylate (Polymethylmethacrylate, PMMA), ink lay or layer of paint are arranged on the keycap 10242, and transparent area 10226 is arranged in ink lay or the layer of paint, but the facial expression line passes through.In addition, when keycap 10242 stressed pressing down, transparent elastomer 10244 is subjected to the switch of keycap 10242 effects distortion downwards and conflict film circuit board 1026, produces corresponding signal.Base plate 1022 is provided with the fixed structure 10222 of a plurality of projections, one end of scissor structure 10246 is linked on the fixed structure 10222 of base plate 1022, the other end is linked to the bottom side of keycap 10242, so that keycap 10242 relatively base plate 1022 move up and down, transparent elastomer 10244 with the transparent rubber material make and be arranged at film circuit board 1026 and keycap 10242 between, with to upper support keycap 10242, wherein film circuit board 1026 is with the perspex material, for example polyester fiber (polyester, PE) made.A plurality of light sources 1046 and current mirroring circuit 106 all be arranged at film 108 on.In addition, base plate 1022 is provided with through hole 10224 respectively with respect to a plurality of buttons 1024 places, and the light of light source 1046 is by passing through the transparent area 10226 of button 1024 again behind the through hole 10224.
Fig. 3 illustrates the schematic diagram of illuminated keyboard device 300 for another embodiment of the present utility model.The difference of illuminated keyboard device 300 and illuminated keyboard device 100 is that base plate 1022 is made for transparent material, polycarbonate resin (Polycarbonate for example, PC) or polymethyl methacrylate (Polymethylmethacrylate, PMMA), therefore, base plate 1022 does not need through hole, can allow light pass through.The light of light source 1046 is by passing through the transparent area 10226 on the keycap 1024 again behind the base plate 1022.All the other operating principles of illuminated keyboard device 300 are all identical with illuminated keyboard device 100, do not repeat them here.
In sum, illuminated keyboard device provided by the utility model utilizes the characteristic of current mirroring circuit replica current, no matter the light source distance current mirroring circuit how far, that is is not subjected to the influence of light source putting position, all can make the electric current of driving light source equate haply.In addition, illuminated keyboard device provided by the utility model also has following advantage: be located at the film circuit board of keypad portion when light source, additional mechanism then needn't be set light source is set; 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.
According to the detailed description of above embodiment, hope can be known description feature of the present utility model and spirit more, and is not to come the utility model is limited with above-mentioned disclosed embodiment.
Claims (6)
1. illuminated keyboard device is characterized in that comprising:
Keypad portion has base plate and a plurality of button, and wherein these a plurality of buttons have transparent area respectively, and these a plurality of buttons are arranged on this base plate in the mode that this base plate relatively moves up and down;
Light guide plate is arranged at this keypad portion below, and this light guide plate has in order to hold a plurality of depressed parts of a plurality of light sources; And
Make the equal current mirroring circuit of current value of these a plurality of light sources, be coupled to this a plurality of light sources.
2. illuminated keyboard device according to claim 1 is characterized in that: this illuminated keyboard device also comprises:
Film, wherein these a plurality of light sources and this current mirroring circuit all are arranged on this film.
3. illuminated keyboard device according to claim 2 is characterized in that: this current mirroring circuit also comprises a plurality of connection lines, and these a plurality of connection lines couple this a plurality of light sources, and these a plurality of connection lines are printed on this film with metal cream.
4. illuminated keyboard device according to claim 1 is characterized in that: these a plurality of light sources are light-emittingdiode.
5. illuminated keyboard device according to claim 1 is characterized in that: this base plate is provided with through hole respectively with respect to this a plurality of buttons place, and the light of this light source also passes through the transparent area of this button by this through hole.
6. illuminated keyboard device according to claim 1 is characterized in that: this base plate is the made base plate of transparent material, and the light of this light source is by this base plate and by these transparent areas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205528463U CN201812716U (en) | 2010-09-21 | 2010-09-21 | Light-emitting keyboard device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205528463U CN201812716U (en) | 2010-09-21 | 2010-09-21 | Light-emitting keyboard device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201812716U true CN201812716U (en) | 2011-04-27 |
Family
ID=43895655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205528463U Expired - Lifetime CN201812716U (en) | 2010-09-21 | 2010-09-21 | Light-emitting keyboard device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201812716U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104576147A (en) * | 2014-12-24 | 2015-04-29 | 东莞永钜电子有限公司 | Ultrathin luminous keyboard |
| US11443907B2 (en) | 2020-08-05 | 2022-09-13 | Chicony Power Technology Co., Ltd. | Illuminated keyboard and backlight module thereof |
| TWI814558B (en) * | 2020-08-05 | 2023-09-01 | 群光電能科技股份有限公司 | Backlight module of illuminated keyboard |
| CN116913717A (en) * | 2023-09-13 | 2023-10-20 | 合肥联宝信息技术有限公司 | Film keyboard |
-
2010
- 2010-09-21 CN CN2010205528463U patent/CN201812716U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104576147A (en) * | 2014-12-24 | 2015-04-29 | 东莞永钜电子有限公司 | Ultrathin luminous keyboard |
| US11443907B2 (en) | 2020-08-05 | 2022-09-13 | Chicony Power Technology Co., Ltd. | Illuminated keyboard and backlight module thereof |
| TWI798573B (en) * | 2020-08-05 | 2023-04-11 | 群光電能科技股份有限公司 | Illuminated keyboard |
| TWI814558B (en) * | 2020-08-05 | 2023-09-01 | 群光電能科技股份有限公司 | Backlight module of illuminated keyboard |
| CN116913717A (en) * | 2023-09-13 | 2023-10-20 | 合肥联宝信息技术有限公司 | Film keyboard |
| CN116913717B (en) * | 2023-09-13 | 2023-11-28 | 合肥联宝信息技术有限公司 | Film keyboard |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110427 |