CN2831687Y - Double-color LED indicator - Google Patents
Double-color LED indicator Download PDFInfo
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- CN2831687Y CN2831687Y CN 200520088600 CN200520088600U CN2831687Y CN 2831687 Y CN2831687 Y CN 2831687Y CN 200520088600 CN200520088600 CN 200520088600 CN 200520088600 U CN200520088600 U CN 200520088600U CN 2831687 Y CN2831687 Y CN 2831687Y
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Abstract
The utility model provides an indicator of a double-color light-emitting diode, which relates to an optoelectronic component composed of a light-emitting diode and a resistor. The utility model is provided with two different monochromatic light-emitting diodes whose electrodes with the same first polarity are connected with each other, passes by a current limiting resistor and then connected to the electrode with the first polarity of a power supply. The electrode with the second polarity of one light-emitting diode is connected with a control input terminal, and the electrode with the second polarity of the other light-emitting diode passes by a floating resistor and is connected to the electrode with the second polarity of the power supply. The resistance value of the current limiting resistor is far greater than that of the floating resistor. The utility model obtains the purpose that the light-emitting diodes project light with two colors under the action of the control level of one control input terminal, and solves the problems that the products of the prior art have a plurality of control input terminals, and an external coordination control circuit can add elements, connecting wires and additional cost.
Description
Technical field
The utility model relates to a kind of photoelectric subassembly of being made up of light-emitting diode and resistance.
Technical background
In existing various electric equipments, often use two kinds of relevant operating states of the light-emitting diode indicating equipment of two different monochromes; A kind of monochromatic light embodiment device of color is in a certain operating state, and the monochromatic light embodiment device of another kind of color is in another kind of operating state.For example serve as in the device with red indication and be in charged state, be in the charging completion status with green the indication.A kind of typical dichromatic LED indicating device execution mode connects the anodal VCC of power supply as shown in Figure 1 again through a current-limiting resistance RX after the positive electrode of these two different single color LED R-LED, G-LED interconnects; Wherein the negative electrode of red light emitting diodes R-LED connects first control input end T1, and the negative electrode of green LED G-LED connects second control input end T2.To be designated as high level near the level of the anodal VCC voltage of power supply for sake of convenience below, will be designated as low level near the level of the negative pole no-voltage of power supply.Only needing red light emitting diodes R-LED to light when luminous, should make first control input end T1 is low level, and second control input end T2 is high level.Only needing green LED G-LED to light when luminous, should make first control input end T1 is high level, and second control input end T2 is low level.For preventing the indefinite situation of indicating status, promptly two different single color LED R-LED, G-LED light luminous situation simultaneously, must forbid that first control input end T1 and second control input end T2 are low level simultaneously.For the control signal of coordinating first control input end T1 and second control input end T2 satisfies afore mentioned rules, also to add more element and construct special circuit.Fig. 2 illustrates the simplest a kind of coordination control circuit, after dichromatic LED indicating device shown in Figure 1 had connected this coordination control circuit of switching transistor QK and resistance R K composition, two light-emitting diode R-LED, G-LED just can light luminous fully under the signal controlling of first control input end T1 according to afore mentioned rules.The grounded emitter of switching transistor QK, the base stage of switching transistor QK connects dichromatic LED indicating device first control input end T1 through resistance R K; The collector electrode of switching transistor QK connects second control input T2 of dichromatic LED indicating device.When first control input of dichromatic LED indicating device T1 was high level, red light emitting diodes R-LED was not luminous; And switching transistor QK conducting, it makes second control input of dichromatic LED indicating device T2 is low level, green LED G-LED lights luminous.When first control input of dichromatic LED indicating device T1 was low level, red light emitting diodes R-LED was luminous; And switching transistor QK ends, and it makes second control input of dichromatic LED indicating device T2 is high level, and green LED G-LED is not luminous.Another kind of typical dichromatic LED indicating device execution mode as shown in Figure 3, after the negative electrode of these two different single color LED R-LED ', G-LED ' interconnected, the negative pole that connects power supply again was a ground connection; Wherein the positive electrode of red light emitting diodes R-LED ' is through current-limiting resistance RX1 ' connection first control input end T1 ', and the positive electrode of green LED G-LED ' is through second control input end T2 ' of a current-limiting resistance RX2 ' connection.Only needing red light emitting diodes R-LED ' to light when luminous, should make first control input end T1 ' is high level, and second control input end T2 ' is low level.Only needing green LED G-LED ' to light when luminous, should make first control input end T1 ' be low level, and second control input end T2 ' is being high level.For preventing the indefinite situation of indicating status, promptly two different single color LED R-LED ', G-LED ' light luminous situation simultaneously, must forbid that first control input end T1 ' and second control input end T2 ' are high level simultaneously.For the control signal of coordinating first control input end T1 ' and second control input end T2 ' satisfies afore mentioned rules, need to add more element and the complicated more specialized circuitry of structure.Producing in enormous quantities or a large amount of occasion of using, existing dichromatic LED indicating device exists the control input simple inadequately, and external coordination control circuit can increase the problem of element and connecting line and fringe cost.
The utility model content
The utility model aims to provide a kind of control input end of having only, and can alternately send two kinds of color of light under the control level effect of this control input end, and the simple dichromatic LED indicating device of annexation.
The technical solution of the utility model is: the dichromatic LED indicating device, have two different monochromatic light-emitting diodes, connect the electrode of first polarity of power supply after the electrode of first polarity that two light-emitting diodes are identical interconnects through a current-limiting resistance again; The electrode of second polarity of one of them light-emitting diode connects a control input end, and the electrode of second polarity of another light-emitting diode connects the electrode of second polarity of power supply again through a floating resistance; The resistance value of described current-limiting resistance is much larger than the resistance value of floating resistance.This dichromatic LED indicating device is at the incoming level of control input end during near the supply voltage of first polarity, and is not luminous with the joining light-emitting diode in control input end, and the another lumination of light emitting diode; During near the supply voltage of second polarity, with the joining lumination of light emitting diode in control input end, and the another light-emitting diode is even not luminous because the effect of floating resistance only can be sent faint light at the incoming level of control input end.
A kind of execution mode is: first polarity is positive polarity, and second polarity is negative polarity.
Another kind of execution mode is: first polarity is negative polarity, and second polarity is positive polarity.
Further: described two different monochromatic light-emitting diodes are encapsulated in the same housing.It is little that the dichromatic LED that constitutes is installed in this indicating device occupation space, and line is simpler; This indicating device only need expose a dichromatic LED housing when using, rather than two independent LED housings, so that this indicating device uses on various device is also just more convenient.
The utility model dichromatic LED indicating device adopts the electrode of an electrode of a light-emitting diode through a current-limiting resistance connection power supply; Second electrode of this light-emitting diode connects another electrode of power supply much smaller than the floating resistance of current-limiting resistance through a resistance value; Second light-emitting diode connects the electrode that last light-emitting diode connects current-limiting resistance with identical electrode, and another electrode of second light-emitting diode connects the structure of a control input end; Utilize floating resistance, the light-emitting diode that is connected between current-limiting resistance and the floating resistance under the incoming level control of control input end independently sends monochromatic light; Perhaps second lumination of light emitting diode under the control of the incoming level of control input end, and it is luminous or only send faint light and form and second mixed light that the light emitting diode light form and aspect are near to be connected on light-emitting diode between current-limiting resistance and the floating resistance, and the purpose of two kinds of color of light can be alternately sent in the control level effect that is implemented in a control input end down.Not only self structure is simple for the utility model dichromatic LED indicating device, and cost is low; Owing to externally have only a control input end, than the obvious coordination control circuit and the connecting line that add saved of prior art, be used in occasions such as simple electric equipment products and billboard, warning mark, decorative chain in a large number, not only can significantly reduce numerous and diverse property of assembly working, can also reduce user's production cost significantly.Particularly adopt two different monochromatic light-emitting diodes to be encapsulated in dichromatic LED in the same housing, it is little that this indicating device is installed in the various device occupation space, uses also just more convenient.
Description of drawings
Fig. 1 is the electric structure chart of a kind of dichromatic LED indicating device of prior art.
Fig. 2 is a dichromatic LED indicating device and coordinate the electric structure chart of control circuit among Fig. 1.
Fig. 3 is the electric structure chart of another dichromatic LED indicating device of prior art.
Fig. 4 is the electric structure chart of an embodiment of the utility model dichromatic LED indicating device.
Fig. 5 is the electric structure chart of another embodiment of the utility model dichromatic LED indicating device.
Embodiment
One, embodiment one
The electric structure of first embodiment of the utility model dichromatic LED indicating device, as shown in Figure 4.
This dichromatic LED indicating device is made up of the light-emitting diode D2 of the light-emitting diode D1 of a redness, a green, current-limiting resistance R1, a floating resistance R2.The end of current-limiting resistance R1 connects the positive electrode V of power supply as external link
CCThe other end of current-limiting resistance R1 connects the positive electrode of two light-emitting diode D1, D2.The negative electrode of red light emitting diodes D1 connects control input end T.The negative electrode of green LED D2 connects the end of floating resistance R2.The other end of floating resistance R2 connects the negative electrode of power supply, just ground connection as another external link.Positive electrode V at power supply
CCVoltage is under the situation of 4.7V-10V, and the resistance value of current-limiting resistance R1 is chosen as 220 ohm, much larger than 100 ohm of the resistance values of floating resistance R2.
This dichromatic LED indicating device is at the incoming level of the control input end T positive electrode V near power supply
CCDuring voltage, red light emitting diodes D1 is in reverse state, and is not luminous; And green LED D2 is in forward condition, and is luminous.During near no-voltage, red light emitting diodes D1 is in forward condition, and is luminous at the incoming level of control input end T; And green LED D2 is even not luminous because the effect of floating resistance R2 only can be sent faint light.
Certainly, the definitions of color of two light-emitting diodes can be exchanged in the present embodiment, also can adopt yellow or blue light-emitting diode.Two preferably selected different monochromatic light-emitting diodes are the dichromatic LEDs in being encapsulated in same housing, so that two light-emitting diodes occupation space in this indicating device is little, line is simpler.
Two, embodiment two
The electric structure of second embodiment of the utility model dichromatic LED indicating device, as shown in Figure 5.This dichromatic LED indicating device is made up of the light-emitting diode D2 ' of the light-emitting diode D1 ' of a redness, a green, current-limiting resistance R1 ', a floating resistance R2 '.The end of current-limiting resistance R1 ' connects the negative electrode of power supply, just ground connection as external link.The other end of current-limiting resistance R1 connects the negative electrode of two light-emitting diode D1 ', D2 '.The positive electrode of red light emitting diodes D1 ' connects control input end T '.The positive electrode of green LED D2 ' connects the end of floating resistance R2 '.The other end of floating resistance R2 ' connects the positive electrode V ' of power supply as another external link
CCPositive electrode V ' at power supply
CCVoltage is under the situation of 4.7V-10V, and the resistance value of current-limiting resistance R1 ' is chosen as 220 ohm, much larger than 100 ohm of the resistance values of floating resistance R2 '.
This dichromatic LED indicating device is at the incoming level of the control input end T ' positive electrode V ' near power supply
CCDuring voltage, red light emitting diodes D1 ' is in forward condition, and is luminous; And green LED D2 ' is even not luminous because the effect of floating resistance R2 ' only can be sent faint light.During near no-voltage, red light emitting diodes D1 ' is in reverse state, and is not luminous at the incoming level of control input end T '; And green LED D2 ' is in forward condition, and is luminous.
Certainly, the definitions of color of two light-emitting diodes also can be exchanged in the present embodiment, also can adopt yellow or blue light-emitting diode.Two different monochromatic light-emitting diodes preferably selecting for use are the dichromatic LEDs in being encapsulated in same housing, so that two light-emitting diodes occupation space in this indicating device is little, line is simpler.
The above only is the utility model preferred embodiment, does not limit the scope that the utility model is implemented with this, and the equivalence of doing according to the technical solution of the utility model and description changes and modification, all should belong to the scope that the utility model is contained.
Claims (4)
1. dichromatic LED indicating device has two different monochromatic light-emitting diodes, it is characterized in that: the electrode that connects first polarity of power supply after the electrode of first polarity that two light-emitting diodes are identical interconnects through a current-limiting resistance again; The electrode of second polarity of one of them light-emitting diode connects a control input end, and the electrode of second polarity of another light-emitting diode connects the electrode of second polarity of power supply again through a floating resistance; The resistance value of described current-limiting resistance is much larger than the resistance value of floating resistance.
2. dichromatic LED indicating device according to claim 1 is characterized in that: first polarity is positive polarity, and second polarity is negative polarity.
3. dichromatic LED indicating device according to claim 1 is characterized in that: first polarity is negative polarity, and second polarity is positive polarity.
4. according to claim 1 or 2 or 3 described dichromatic LED indicating devices, it is characterized in that: described two different monochromatic light-emitting diodes are encapsulated in the same housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520088600 CN2831687Y (en) | 2005-11-02 | 2005-11-02 | Double-color LED indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520088600 CN2831687Y (en) | 2005-11-02 | 2005-11-02 | Double-color LED indicator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2831687Y true CN2831687Y (en) | 2006-10-25 |
Family
ID=37136608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520088600 Expired - Fee Related CN2831687Y (en) | 2005-11-02 | 2005-11-02 | Double-color LED indicator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2831687Y (en) |
-
2005
- 2005-11-02 CN CN 200520088600 patent/CN2831687Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061025 Termination date: 20091202 |