CN203826266U - A keyboard - Google Patents
A keyboard Download PDFInfo
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- CN203826266U CN203826266U CN201420223201.3U CN201420223201U CN203826266U CN 203826266 U CN203826266 U CN 203826266U CN 201420223201 U CN201420223201 U CN 201420223201U CN 203826266 U CN203826266 U CN 203826266U
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- touch
- control unit
- led
- pcb board
- main control
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Abstract
The utility model discloses a keyboard comprising a PCB, an LED backlight board, a master control unit and a touch control circuit. The PCB is provided with at least one light transmission hole. A copper foil ring is arranged on the periphery of each light transmission hole in the upper surface of the PCB. The lower surface of the PCB is attached to the upper surface of the LED backlight board in an adhesive mode. The copper foil loop is in electric connection with an input terminal of the touch control circuit. An output terminal of the touch control circuit is connected with the master control unit. An output terminal of the master control unit is connected to the LED backlight board through a drive circuit. Keys of the keyboard are good in backlight and light transmission effects.
Description
Technical field
The utility model relates to a kind of keyboard.
Background technology
Since having keyboard, the character being just used on display keyboard button backlight, makes also can clearly see the character on keyboard clearly under the darker environment of light.In the prior art, most key-press backlight can be covered a part by spring or PCB, causes button character to show unintelligible.
Utility model content
The purpose of this utility model is in order to overcome above-mentioned the deficiencies in the prior art, and a kind of printing opacity keyboard is more clearly provided.
A kind of keyboard, comprises pcb board, LED-backlit plate, main control unit and touch-control circuit, and described pcb board is provided with at least one loophole, and the periphery of the each loophole of upper surface of described pcb board is provided with Copper Foil circle; The lower surface of described pcb board is affixed on the upper surface of described LED-backlit plate; Described Copper Foil circle is electrically connected on the input of touch-control circuit, and an output of touch-control circuit is connected in described main control unit, and an output of main control unit is connected in LED-backlit plate by drive circuit.
Wherein, described loophole matrix form is arranged on described pcb board.
Wherein, described loophole distributing is arranged on described pcb board.
Wherein, described touch-control circuit is BS83B12-1 touch-control chip, and described Copper Foil circle is electrically connected with the input of BS83B12-1 touch-control chip by resistance, and the interrupt output end of BS83B12-1 touch-control chip is electrically connected on the input of main control unit.
Wherein, the diameter of described loophole is 6 to 8 millimeters, and the width of described Copper Foil circle is 4 to 5 millimeters.
Described LED-backlit plate comprises red, blue, green three-color LED pipe, and red, blue, green three-color LED pipe is electrically connected with main control unit respectively, and main control unit mixes the different colours of LED-backlit plate by controlling the duty ratio of three kinds of LED pipes conducting.
The beneficial effects of the utility model are: the utility model keyboard is arranged at LED-backlit plate the lower surface of keyboard pcb board, on pcb board, be provided with loophole, Copper Foil circle is arranged to the periphery of loophole, the light that LED-backlit plate sends exposes to pcb board upper surface by loophole, thereby makes the character clear display on button.
Brief description of the drawings
Fig. 1 is the vertical view of the utility model one execution mode keyboard;
Fig. 2 is that A-A in Fig. 1 is to profile;
Main label declaration:
1-PCB plate; 2-loophole; 3-Copper Foil circle; 4-LED backlight.
Embodiment
By describing technology contents of the present utility model, structural feature in detail, being realized object and effect, below in conjunction with execution mode and coordinate accompanying drawing to be explained in detail.
The main main design of the utility model is: by offer loophole 2 on pcb board 1, Copper Foil circle 3 is arranged in the periphery of loophole 2, therefore the light that is arranged at the LED-backlit plate 4 of pcb board 1 lower surface is irradiated to the upper surface of pcb board 1 by loophole 2, thereby makes the character demonstration on button more clear.
Refer to Fig. 1 and Fig. 2, a kind of keyboard of present embodiment, comprises pcb board 1, LED-backlit plate 4, main control unit and touch-control circuit;
Wherein, described main control unit is single-chip microcomputer or other programmable microprocessor;
Described pcb board 1 can select single-side coated copper plate also can select double face copper, on pcb board 1, be provided with at least one loophole 2, described loophole 2 is the through hole through pcb board 1 upper surface and lower surface, loophole 2 is determined according to arranging of actual key, in the present embodiment, described loophole 2 distributes by matrix form, and in other embodiments, described loophole 2 can be distributed on described pcb board 1 by distributing.
Periphery at the each loophole 2 of upper surface of described pcb board 1 is provided with Copper Foil circle 3; The lower surface of described pcb board 1 is affixed on the upper surface of described LED-backlit plate 4; Described Copper Foil circle 3 is electrically connected on the input of touch-control circuit, described touch-control circuit can obtain the touch input signal on Copper Foil circle 3, one output of touch-control circuit is connected in described main control unit, and an output of main control unit is connected in LED-backlit plate 4 by drive circuit.
Therefore, when touch-control circuit gets while having touch-control input on Copper Foil circle 3, while having key-press input, send touch-control input signal to main control unit, main control unit is lighted LED-backlit plate 4 by drive circuit, the upper surface that is transmitted to pcb board 1 by loophole 2 backlight that LED-backlit plate 4 sends, thus illuminate the button that is arranged at pcb board 1 upper surface.This keyboard is arranged at LED-backlit plate 4 lower surface of pcb board 1, by loophole 2, the light of backlight is transmitted through to pcb board 1 upper surface, thereby makes button character clear display.
Because everyone finger belly diameter of finger is to be greater than 9 millimeters substantially, in the present embodiment described, in order to improve the detection sensitivity of touch-control circuit, the diameter of described loophole 2 is set to 6 to 8 millimeters, and the width of described Copper Foil circle 3 is set to 4 to 5 millimeters.
In the present embodiment, described touch-control circuit is BS83B12-1 touch-control chip, and described Copper Foil circle 3 is electrically connected with the input of BS83B12-1 touch-control chip by resistance, and the interrupt output end of BS83B12-1 touch-control chip is electrically connected on the input of main control unit.In the time that operator's finger is less than 3 millimeters apart from the distance of Copper Foil circle 3, touch-control circuit can obtain touch-control input signal, thus the interrupt signal of generation send to main control unit, and main control unit is by electroluminescence in drive circuit driving LED backlight 4.In other embodiments, described touch-control circuit can be selected other touch-control chips.
In the present embodiment, in described LED-backlit plate 4, be provided with red, blue, green three-color LED pipe, red, blue, green three-color LED pipe is electrically connected with main control unit respectively, and main control unit, by controlling the duty ratio of three kinds of LED pipes conducting, mixes the different colours of LED-backlit plate 4.
In another embodiment, described keyboard comprises pcb board, paster LED pipe, main control unit and touch-control circuit, is provided with induction Copper Foil on described pcb board;
Induction Copper Foil is electrically connected with touch-control circuit, and the output of touch-control circuit is electrically connected with main control unit, and paster LED pipe is electrically connected with the output of main control unit;
Wherein, each induction Copper Foil is made up of four copper foils, and described paster LED pipe is arranged at the centre of four copper foils, in four copper foils, has two to be ground connection, and other two is induction Copper Foil.Therefore, in the time that touch-control circuit detects the input on induction Copper Foil, send the signal of telecommunication to main control unit, main control unit output control signal, lights paster LED pipe, thereby illuminates the character on button.In the present embodiment, the distance of described four copper foils only has 5 millimeters, and the diameter of people's finger finger belly is all greater than 9 millimeters based on upper, and therefore, it is no problem triggering button.
In sum, the utility model keyboard can improve the display effect of keyboard back light, can ensure that again keyboard has good input susceptibility.
The foregoing is only embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (6)
1. a keyboard, is characterized in that, comprises pcb board, LED-backlit plate, main control unit and touch-control circuit, and described pcb board is provided with at least one loophole, and the periphery of the each loophole of upper surface of described pcb board is provided with Copper Foil circle;
The lower surface of described pcb board is affixed on the upper surface of described LED-backlit plate;
Described Copper Foil circle is electrically connected on the input of touch-control circuit, and an output of touch-control circuit is connected in described main control unit, and an output of main control unit is connected in LED-backlit plate by drive circuit.
2. keyboard according to claim 1, is characterized in that, described loophole matrix form is arranged on described pcb board.
3. keyboard according to claim 1, is characterized in that, described loophole distributing is arranged on described pcb board.
4. according to the keyboard described in claim 2 or 3, it is characterized in that, described touch-control circuit is BS83B12-1 touch-control chip, and described Copper Foil circle is electrically connected with the input of BS83B12-1 touch-control chip by resistance, and the interrupt output end of BS83B12-1 touch-control chip is electrically connected on the input of main control unit.
5. keyboard according to claim 4, is characterized in that, the diameter of described loophole is 6 to 8 millimeters, and the width of described Copper Foil circle is 4 to 5 millimeters.
6. keyboard according to claim 4, it is characterized in that, described LED-backlit plate comprises red, blue, green three-color LED pipe, and red, blue, green three-color LED pipe is electrically connected with main control unit respectively, and main control unit mixes the different colours of LED-backlit plate by controlling the duty ratio of three kinds of LED pipes conducting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420223201.3U CN203826266U (en) | 2014-05-04 | 2014-05-04 | A keyboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420223201.3U CN203826266U (en) | 2014-05-04 | 2014-05-04 | A keyboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203826266U true CN203826266U (en) | 2014-09-10 |
Family
ID=51481737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420223201.3U Active CN203826266U (en) | 2014-05-04 | 2014-05-04 | A keyboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203826266U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109524269A (en) * | 2017-09-20 | 2019-03-26 | 致伸科技股份有限公司 | Keyboard and film switch circuit |
| CN109905114A (en) * | 2019-03-27 | 2019-06-18 | 深圳创维－Rgb电子有限公司 | Touch controlled key and terminal |
-
2014
- 2014-05-04 CN CN201420223201.3U patent/CN203826266U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109524269A (en) * | 2017-09-20 | 2019-03-26 | 致伸科技股份有限公司 | Keyboard and film switch circuit |
| CN109905114A (en) * | 2019-03-27 | 2019-06-18 | 深圳创维－Rgb电子有限公司 | Touch controlled key and terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |