CN201903837U - Series-parallel circuit of luminescent keyboard - Google Patents
Series-parallel circuit of luminescent keyboard Download PDFInfo
- Publication number
- CN201903837U CN201903837U CN2010202870213U CN201020287021U CN201903837U CN 201903837 U CN201903837 U CN 201903837U CN 2010202870213 U CN2010202870213 U CN 2010202870213U CN 201020287021 U CN201020287021 U CN 201020287021U CN 201903837 U CN201903837 U CN 201903837U
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- emitting diode
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Abstract
The utility model discloses a series-parallel circuit of a luminescent keyboard, which is invented for solving the problems of uneven brightness and the like in the prior art. The luminescent keyboard is provided with a plurality of control press key blocks. The series-parallel circuit comprises a plurality of luminescent circuit blocks, the luminescent circuit blocks are electrically connected with one another in parallel, each luminescent circuit block comprises at least one resistor and at least one light-emitting diode, the resistor is electrically connected with the light-emitting diode in series, each luminescent circuit block correspondingly illuminate each control press key block of the luminescent keyboard, and a plurality of connecting lines are arranged on each corresponding resistor and the light-emitting diode and between the corresponding resistor and the light-emitting diode so that disconnection caused by punching is avoided, and the production yield rate is improved. The number of the resistors can be increased or reduced to regulate a resistance value and ensure that current values of all the luminescent circuit blocks are approximately same, and the difference generated by the brightness of different luminescent circuit blocks can be avoided.
Description
Technical field
The utility model relates to a kind of illuminated keyboard, particularly a kind of series-parallel circuit of illuminated keyboard.
Background technology
Because LED has the advantage of low-power high brightness, initial stage is a large amount of as indicating with outside the lamp, be widely used in illuminator lamp in the recent period, all as seen reached light emitting diode (LED) assembly just as the illuminating products such as backlight module, electric torch or desk lamp of liquid crystal flat panel display.
Because illuminating ray must provide stable and uniform bright dipping briliancy, with liquid crystal flat panel display, the even luminous exitance of the big area of plane must be provided, so the composition structure of the light-emitting diode (LED) backlight module of its use is quite complicated, at least include light-emitting diode component, light guide plate, blast sheet, diffusion barrier, rhombus lens etc., could be effectively light emitting diode light be constituted one and all bright go out optical plane.
Yet, for the other products that uses backlight module at present equally, be not strict with the bright dipping briliancy homogeneity of its planar light source, but still see that light-emitting diode component has the advantage of low-power high brightness, and directly use the illuminating source of a plurality of light-emitting diode components as backlight module, so that planar light source to be provided, only as direct supply enter by circuit board one side, make to be abound with that light-emitting diode component presents the shortcoming that brightness differs on the backlight module plane.
Because plural series circuit is a linking number light-emitting diode component respectively, so need the DC power supply of big voltage and electric current, when direct supply is imported, electric current can see through power circuit each series circuit of flowing through, only the relative direct supply of a plurality of light-emitting diode components has the branch of distance, and each series circuit and power circuit are all wide, cause higher with the short light-emitting diode component brightness that is connected of series circuit, with the long light emitting diode that is connected of series circuit then because of with the direct supply apart from each other, and brightness is obviously darker, therefore vertical plural light-emitting diode component is covered with on wiring board, the optical plane that goes out of even bright dipping briliancy still can't be provided.
Moreover, because each keypress function configuration on the not corresponding keyboard of setting of light emitting diode is conveniently recognized in the time of can't making the user operate, and in the connection of circuit, can cause the reduction of producing yield because the drilling operation when producing causes the broken string of part.
The utility model content
For overcoming above-mentioned defective, the purpose of this utility model is to address the above problem and a kind of series-parallel circuit that can color-identifying control button block in illuminated keyboard is provided.
Another purpose of the present utility model is to adjust series resistor quantity and resistance value thereof, and the electric current that makes each illuminating circuit block avoids the brightness of different blocks to produce difference near identical.
A purpose more of the present utility model is between the resistance, between the light emitting diode and between resistance and the light emitting diode, connects with many circuits, and the broken string that drilling operation causes when avoiding producing improves by this and produces yield.
For reaching above-mentioned purpose, the utility model proposes a kind of series-parallel circuit of illuminated keyboard, this illuminated keyboard has some control button blocks, and this series-parallel circuit comprises: some illuminating circuit blocks, these illuminating circuit blocks electrically connect parallel with one anotherly, and respectively the described series-parallel circuit of this illuminating circuit block comprises at least one resistance and at least one light emitting diode, this at least one resistance in series electrically connects mutually with the described series-parallel circuit of this at least one light emitting diode, and these control button blocks and its radiation source is provided of corresponding this illuminated keyboard of the described series-parallel circuit of these illuminating circuit blocks, corresponding respectively this illuminating circuit block with respectively should electrically connect by control button block.
Preferable, this series-parallel circuit more comprises a light activated switch module, it is connected in parallel and electrically with these illuminating circuit blocks.
Preferable, this at least one light emitting diode is a plurality of light emitting diodes, in series and electrically connect between these diodes, this at least one resistance is a plurality of resistance, connect in series and electrically between this constant resistance, respectively between this resistance, respectively be connected with a plurality of circuits between this light emitting diode and between this resistance and this light emitting diode.
Preferable, respectively the resistance value of this at least one resistance of this illuminating circuit block is inequality, and respectively the glow color of this at least one light emitting diode of this illuminating circuit block is inequality.
By said structure, each illuminating circuit block 21,22,23,24 is parallel with one another, and resistance R wherein 1, R2, R3, R4 connect mutually with light emitting diode D1, D2, D3, D4, form the series-parallel circuit structure, and have a plurality of connection lines between the resistance, between the light emitting diode and between resistance and the light emitting diode, use and avoid the broken string that punches and caused, produce yield to improve; Moreover, because each illuminating circuit block 21,22,23, the corresponding button block of respectively controlling of 24 described series-parallel circuits is (as digital key zone piece 11, function button block 12, keyboard button block 13 and/or blank button block 14) be provided with and connection electrically, so light emitting diode D1 that can different colours, D2, D3, D4 shines in the corresponding button block of respectively controlling, can make things convenient for the user to operate, and each resistance R 1, R2, R3, the quantity of R4 can increase and decrease to adjust resistance value, make each illuminating circuit block 21,22,23,24 current value produces difference near identical with the luminosity of avoiding different blocks.
Description of drawings
Fig. 1 represents the synoptic diagram of the applied illuminated keyboard of the utility model.
Fig. 2 represents the circuit diagram of the utility model series-parallel circuit.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
Please also refer to Fig. 1 and Fig. 2, wherein, Fig. 1 represents the synoptic diagram of the applied illuminated keyboard of the utility model, and Fig. 2 represents the circuit diagram of the utility model light strings parallel circuit.
Illuminated keyboard 10 of the present utility model includes some control button blocks, for example digital keys block 11, function button block 12, keyboard button block 13 and/or blank button block 14 etc., the utility model is that example describes with above-mentioned four control button blocks, but not as limit, and illuminated keyboard of the present utility model 10 is applicable to thin button keyboard or touch control keyboard.
And the luminous series-parallel circuit 1 of the utility model electrically connects institute in parallel by some illuminating circuit blocks and forms, and each illuminating circuit block corresponds to each button block (as digital key zone piece 11, function button block 12, keyboard button block 13 and/or blank button block 14) of aforementioned illuminated keyboard 10 and connects electrically, and makes illuminating circuit block correspondence be divided into the first illuminating circuit block 21, the second illuminating circuit block 22, the 3rd illuminating circuit block 23 and the 4th illuminating circuit block 24 at least.
Each illuminating circuit block is by at least one resistance and at least one light emitting diode (Light EmittingDiode, LED) in series electric connection constitutes, that is the first illuminating circuit block, 21 described series-parallel circuits by at least one resistance R 1 and at least one light emitting diode D1 in series electrically connect the institute constitute, and the second illuminating circuit block 22 by at least one resistance R 2 and at least one light emitting diode D2 in series electrically connect the institute constitute, the 3rd illuminating circuit block 23 in series electrically connects institute by at least one resistance R 3 and at least one light emitting diode D3 and constitutes, and the 4th illuminating circuit block 24 in series electrically connects institute by at least one resistance R 4 and at least one light emitting diode D4 and constitutes.
The quantity of relevant resistance and light emitting diode can increase and decrease according to design requirement, and when avoiding to the punching of circuit board action, the broken string drawback that connects of the circuit that causes, therefore be connected with a circuit at least between the resistance, between the light emitting diode and between resistance and the light emitting diode, the improper broken string situation that using avoids punching is caused, and at least one plural circuit also is the durability for the permanent use that increases circuit board.
Because circuit board line is long more with the distance that power supply (figure does not show) is connected, can cause electric current more little, therefore can be by each illuminating circuit block 21 of increase and decrease, 22,23,24 series resistor R1, R2, R 3, R4 quantity or in response to the series resistor that adopts different resistance values, by the series resistor value of adjusting each illuminating circuit block, the electric current that each illuminating circuit block is obtained is approaching identical, and each resistance R 1, R2, R3, the described series-parallel circuit of R4 is formed by the resistance printing ink printing or is electrically connected by resistor assembly, and circuit board line can be formed by the electrically conductive ink printing.
Moreover, for allowing the user be convenient to just each control button block 11,12,13,14 of branch, light emitting diode D1, D2, D3, the D4 of then corresponding illuminating circuit block 21,22,23,24 can be set to different colours, as red, blueness, green and white etc., but not as limit.
For making the convenient control of user, series-parallel circuit 1 of the present utility model more comprises a light activated switch module 3, its described series-parallel circuit is connected in parallel and electrically with each illuminating circuit block 21,22,23,24, using provides in good time sensing ambient light strong and weak situation, and then reaches saving energy effect and regulation and control startup illuminating circuit.
Therefore, by said structure, each illuminating circuit block 21,22,23,24 is parallel with one another, and resistance R wherein 1, R2, R3, R4 connect mutually with light emitting diode D1, D2, D3, D4, form the series-parallel circuit structure, and have a plurality of connection lines between the resistance, between the light emitting diode and between resistance and the light emitting diode, using and avoid the broken string that punches and caused, producing yield to improve; Moreover, because each illuminating circuit block 21,22,23, the corresponding button block of respectively controlling of 24 described series-parallel circuits is (as digital key zone piece 11, function button block 12, keyboard button block 13 and/or blank button block 14) be provided with and connection electrically, so light emitting diode D1 that can different colours, D2, D3, D4 shines in the corresponding button block of respectively controlling, can make things convenient for the user to operate, and each resistance R 1, R2, R3, the quantity of R4 can increase and decrease to adjust resistance value, make each illuminating circuit block 21,22,23,24 current value produces difference near identical with the luminosity of avoiding different blocks.
Claims (10)
1. the series-parallel circuit of an illuminated keyboard is characterized in that, this illuminated keyboard has some control button blocks, and this series-parallel circuit comprises:
Some illuminating circuit blocks, these illuminating circuit blocks electrically connect parallel with one anotherly, and respectively this illuminating circuit block comprises at least one resistance and at least one light emitting diode, this at least one resistance in series electrically connects mutually with this at least one light emitting diode, and these illuminating circuit blocks correspond to these control button blocks of this illuminated keyboard and its radiation source is provided.
2. series-parallel circuit as claimed in claim 1 is characterized in that, more comprises a light activated switch module, and it is connected in parallel and electrically with these illuminating circuit blocks.
3. series-parallel circuit as claimed in claim 2 is characterized in that, this at least one light emitting diode is a plurality of light emitting diodes, in series and electrically connects between these diodes.
4. series-parallel circuit as claimed in claim 3 is characterized in that, respectively connects with at least one line circuit between this light emitting diode.
5. series-parallel circuit as claimed in claim 1 is characterized in that, this at least one resistance is formed by the resistance printing ink printing or is electrically connected by resistor assembly, and circuit board line is formed by the electrically conductive ink printing.
6. series-parallel circuit as claimed in claim 1 is characterized in that, this at least one resistance is a plurality of resistance, in series and electrically connects between this constant resistance.
7. series-parallel circuit as claimed in claim 6 is characterized in that, is connected with at least one line circuit between this at least one resistance and this at least one light emitting diode.
8. series-parallel circuit as claimed in claim 1 is characterized in that respectively the resistance value of this at least one resistance of this illuminating circuit block is inequality.
9. series-parallel circuit as claimed in claim 1 is characterized in that respectively the glow color of this at least one light emitting diode of this illuminating circuit block is inequality.
10. series-parallel circuit as claimed in claim 1, it is characterized in that, these illuminating circuit blocks correspond to these control button blocks on this illuminated keyboard, and respectively this control button block comprises: digital keys block, function button block, keyboard button block and blank button block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202870213U CN201903837U (en) | 2010-08-10 | 2010-08-10 | Series-parallel circuit of luminescent keyboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202870213U CN201903837U (en) | 2010-08-10 | 2010-08-10 | Series-parallel circuit of luminescent keyboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201903837U true CN201903837U (en) | 2011-07-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202870213U Expired - Fee Related CN201903837U (en) | 2010-08-10 | 2010-08-10 | Series-parallel circuit of luminescent keyboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201903837U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113363101A (en) * | 2020-03-05 | 2021-09-07 | 淮安达方电子有限公司 | Keyboard device |
-
2010
- 2010-08-10 CN CN2010202870213U patent/CN201903837U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113363101A (en) * | 2020-03-05 | 2021-09-07 | 淮安达方电子有限公司 | Keyboard device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110720 Termination date: 20150810 |
|
| EXPY | Termination of patent right or utility model |