CN1649462A - Lighting mode indicator and indicating method - Google Patents
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Abstract
This invention is aimed at providing a device providing a stabilized illumination mode indication voltage for directing the current selected illumination mode and a light adjustable illumination system to avoid variances of light brightness caused by the voltage fluctuation of AC power supply. This invention provides a circuit for monitoring brightness device mode including a monitor device for monitoring the set illumination mode to generate a related monitor signal and a control device for generating a control signal in terms of the monitor signal corresponding to said illumination mode to let the system enter into said illumination mode.
Description
Technical field:
The present invention relates to a kind of Dimmable lighting system, relate in particular to a kind of light illumination mode indicating device and method of in the tunable optical system, using.
Technical background:
Different occasions needs illuminator that different illumination brightness is provided.The tunable optical system, (3-way dim system) can provide three kinds of illumination brightness at different lighting requirements as three-way light adjusting system: low-light level, intermediate light and high brightness.At present, most of three-way light adjusting system only is applicable to the filament incandescent lamp, but along with the appearance of dimmable electronic ballast, compact fluorescent lamp (CFL:Compact Fluorescence Lamp) also can be applicable in the existing three-way light adjusting system.Existing dimmable electronic ballast, in input stage, add and the direct-connected resistance in contact, and detect the size of current of the resistance of flowing through by a current detection circuit, and with the selected light illumination mode of indication active user, thus the size that is used for regulating light output for subsequent conditioning circuit.
Figure 1 shows that a kind of schematic diagram of input stage of the CFL dimmable electronic ballast that can be used for three-way light adjusting system.As shown in the figure, this input stage comprises: be used for contact L1, the L2 and the N that are connected with AC power, wherein L1 and/or L2 can be connected with the live wire of AC power, and contact N is connected with the zero line of AC power usually; A current detection circuit that is connected to contact L1 via resistance R 1; And by four diode D1～D4 and two current rectifying and wave filtering circuits that capacitor C 1, C2 constitute, to obtain direct voltage.
As shown in the figure, can constitute three kinds of connected modes between AC power and contact L1, L2 and the N: under the low-light level light illumination mode, contact L1 is connected (L1-N) with N with AC power, and contact L2 sky connects, and can obtain the direct voltage V of 150V this moment
Dc(if AC power is 120V), and current detection circuit can detect the electric current of the R1 that flows through; Under the intermediate light light illumination mode, contact L2 is connected (L2-N) with N with AC power and the L1 sky connects, and can obtain the direct voltage V after the multiplication of voltage this moment
DcBe 300V, and go up no current because the L1 sky meets R1; Under the highlight illumination pattern, be connected with AC power together with contact N again after contact L1 and the L2 short circuit that ((L1-L2)-N) at this moment, can obtain the direct voltage after the multiplication of voltage equally, and can detect the electric current of the R1 that flows through.Therefore, under the pairing AC power connected mode of above-mentioned any light illumination mode, the size of current of the resistance R of flowing through 1 is all different.This electric current can reflect the different light illumination modes that the user selects, so subsequent conditioning circuit (as the resonant circuit that is used to provide operating voltage and electric current in the drive unit for fluorescent lamp etc.) the light output size that can directly regulate fluorescent lamp according to the output result of current detection circuit.
Yet, because in the circuit shown in Figure 1, current detection circuit is directly connected to contact L1 via R1, the fluctuation of AC power will cause the flowing through electric current of resistance R 1 changes accordingly, also can be subjected to the influence that the current detection circuit output signal changes thereby make the light output of fluorescent lamp not only be subjected to the influence that VD changes.
Fig. 2 illustrates the topological structure that another kind is applied to the CFL dimmable electronic ballast of three-way light adjusting system.Different with circuit shown in Figure 1, the current detection circuit among Fig. 2 is connected on contact L1 and the L2 via resistance R 1 and R2 respectively.In addition, diode D1～D4 and capacitor C 1, C2 have constituted a voltage-multiplying circuit jointly, no matter take above-mentioned which kind of mode to connect AC power, all can obtain the direct voltage (supposing that AC supply voltage is 120V) of 300V at dc output end.
Among Fig. 2, the detected size of current of current detection circuit is by the connected mode decision of contact and AC power.When adopting the mode of L1-N, size of current is determined by R2; When adopting the mode of L2-N, size of current is determined by R1; When adopting the mode of (L1-L2)-N, size of current is then determined by the parallel resistance of R1 and R2.
Similar to Fig. 1, in the circuit shown in Fig. 2, when AC power changed, the detected size of current of current detection circuit is respective change also, thereby influenced the stability of the light output of fluorescent lamp.
Above-mentioned as Fig. 1 or light adjusting circuit shown in Figure 2, when AC power has small fluctuation, all will cause the variation significantly of lighting circuit light output, not only influence the illumination quality, and influence the life-span of lamp.
Therefore, need provide a kind of circuit that is used to indicate required light illumination mode that not influenced by AC power.
Summary of the invention:
The purpose of this invention is to provide a kind of light illumination mode indicating circuit with stable light illumination mode instructed voltage, be used to refer to the connected mode (light illumination mode) of current contact and AC power, and the Dimmable lighting system with this circuit, with the variation of the caused illumination brightness of the voltage fluctuation of avoiding AC power.
A kind of light illumination mode indicating circuit according to embodiments of the invention provide comprises: a monitoring device, be used to monitor set light illumination mode, and produce a corresponding monitor signal; With a control device, be used for producing a control signal according to described monitor signal, this control signal is corresponding to described light illumination mode, so that described system enters described light illumination mode work according to this control signal.
A Dimmable lighting system that provides according to the embodiment of the invention, be used to adjust the output of lighting device, this system comprises: a monitoring light is provided with the circuit of pattern, this circuit comprises: a monitoring device, be used to monitor set light illumination mode, produce a corresponding monitor signal and a control device, be used for producing a control signal according to described monitor signal, this control signal is corresponding to described light illumination mode; And a drive unit, be used for controlling this lighting device according to described control signal, make this lighting device with described light illumination mode work.
According to a kind of method of monitoring the pattern that is provided with of throwing light in the Dimmable lighting system that embodiments of the invention propose, this method comprises: (a) the set light illumination mode of monitoring produces a corresponding monitor signal; (b) produce a control signal according to described monitor signal, this control signal is corresponding to described light illumination mode, so that described Dimmable lighting system enters described light illumination mode work according to this control signal.
By the content of reference below in conjunction with the description of the drawings and claims, and along with understanding more comprehensively of the present invention, other purposes of the present invention and result will understand and easy to understand more.
The accompanying drawing summary:
Hereinafter with reference to accompanying drawing, at length explain the present invention by example, wherein:
Fig. 1 is existing a kind of input stage circuit schematic diagram that is used for the CFL dimmable electronic ballast of three-way light adjusting system;
Fig. 2 is used for the input stage circuit schematic diagram of the CFL dimmable electronic ballast of three-way light adjusting system for existing another kind;
Fig. 3 is the schematic diagram according to a kind of light illumination mode indicating circuit of one embodiment of the present of invention proposition;
Fig. 4 is the schematic diagram according to second kind of light illumination mode indicating circuit of an alternative embodiment of the invention proposition;
Fig. 5 is the schematic diagram according to the third light illumination mode indicating circuit of the 3rd embodiment proposition of the present invention; With
Fig. 6 is second kind of light illumination mode indicating circuit that the present invention proposes, the circuit theory diagrams of realizing in the three-way light adjusting system of reality.
Identical label is indicated similar or corresponding feature or function in institute's drawings attached.
Detailed Description Of The Invention:
In existing dimmable electronic ballast, the variation of AC power will cause the light output problem of unstable of three-way light adjusting system, the present invention proposes to substitute original current sense resistor (R1 and R2) with switch element, thereby by having no-voltage to obtain the conducting of monitor signal driving switch element on monitoring contact L1 and the L2 and ending.Simultaneously in internal circuit, introduce voltage source, be used to provide stable reference voltage, thus according to the voltage source connection switching state, regulate the size of light illumination mode instructed voltage (also can be referred to as control signal).This light illumination mode instructed voltage can be used for accurately regulating operating frequency and the power by the fluorescent lamp of resonant circuit output, thereby obtains the light output corresponding with light illumination mode.Thereby whole light illumination mode indicating circuit can be divided into monitoring device and two parts of control device, and monitoring device is used to monitor the annexation of contact and AC power, and produces monitor signal; Control device makes this instructed voltage corresponding with selected light illumination mode according to the size of this monitor signal control instructed voltage.Below will and connect the circuit that the two circuit network forms by contact, switch element, voltage source and be called the light illumination mode indicating circuit.
According to core concept of the present invention, can design various types of light illumination mode indicating circuits, below will provide three types circuit design, but implementation can be varied in actual applications, be not limited to three kinds described below.
Figure 3 shows that a kind of electric ballast input stage schematic diagram that comprises the light illumination mode indicating circuit.Among Fig. 3, contact L1, L2 and N and diode D1～D4 and capacitor C 1, identical among the connected mode of C2 and Fig. 2, constitute a voltage doubling rectifing circuit.Light illumination mode indicating circuit among Fig. 3 comprises that partly (for example, in the three-way light adjusting circuit of Unite States Standard, this voltage source can only provide the stable reference voltage of 1V to a voltage source V ref.), resistance R 1, R5 and R6, and two respectively by the switch S 1 and the S2 of the driven on contact L1, the L2.Among Fig. 3, voltage source V ref is connected to two branch roads that connect with parallel way via resistance R 1.In two branch roads parallel with one another, a parallel branch is composed in series by resistance R 5 and switch S 1, and another parallel branch is connected in series with switch S 2 by resistance R 6 and forms.The other end of these two parallel branches all is connected with circuit ground (GND).Light illumination mode instructed voltage V
DimOutput be connected with the common node 60 of three resistance.
According to circuit shown in Figure 3, when the contact is connected with AC power in the L1-N mode, switch S 1 conducting, and switch S 2 keeps off-state.At this moment, resistance R 1 and R5 series connection dividing potential drop obtains light illumination mode instructed voltage V
Dim, V
Dim=Vref * R5/ (R1+R5).When the contact is connected in the L2-N mode with AC power, switch S 2 conductings, and switch S 1 keeps off-state.At this moment, light illumination mode instructed voltage V
DimObtain V by resistance R 1 and R6 series connection dividing potential drop
Dim=Vref * R6/ (R1+R6).When the contact is connected with AC power in (L1-L2)-N mode, switch S 1 and S2 conducting simultaneously.At this moment, connect with R1 again after resistance R 5 and the R6 parallel connection, thereby light illumination mode instructed voltage V
DimCan be expressed as V
Dim=Vref * (R5 * R6)/(R1 * R5+R1 * R6+R5 * R6).
This shows, in the circuit shown in Figure 3, only relevant with the resistance of the voltage of voltage source and divider resistance with the corresponding light illumination mode instructed voltage of light illumination mode.Thereby the variation of AC power can not cause V
DimAcute variation, this has limited V to a certain extent
DimFluctuation range.In circuit shown in Figure 3, switch S 1 is connected with parallel way with S2, when the contact with L1-N or (L1-L2)-when the N mode is connected with AC power, pairing V
DimMain size with the resistance R 5 that is connected in series with two switches respectively, R6 is relevant.Therefore, need to select meticulously the resistance of resistance R 5 and R6, to guarantee that the size of light illumination mode instructed voltage has tangible difference under these two kinds of connected modes.
Fig. 4 illustrates the schematic diagram of another kind of improved light illumination mode indicating circuit.For simplicity, only provided light illumination mode indicating circuit part among Fig. 4, other partial circuits are identical with Fig. 3.As shown in Figure 4, resistance R 1 and R4 are serially connected between reference voltage source Vref and the GND.Light illumination mode instructed voltage V
DimOutput links to each other with node 70 between resistance R 1 and the R4.Resistance R 2, constitute a branch road by contact L1 switch driven S1 with by contact L2 switch driven S2 series connection.This branch road is parallel to resistance R 4 two ends (between node 70 and the GND) again.Resistance R 3 is connected in parallel on the two ends (between the node between node 70 and switch S 1 and the S2) of resistance R 2 and switch S 1.
According to circuit shown in Figure 4, when the contact is connected with AC power in the L1-N mode, switch S 1 conducting, and switch S 2 keeps off-state.At this moment, R2 and R3 place branch road are in off state, V
DimObtain V by resistance R 1 and R4 series connection dividing potential drop
Dim=Vref * R4/ (R1+R4).When the contact is connected in the L2-N mode with AC power, switch S 2 conductings, and switch S 1 keeps off-state.At this moment, connect with R1 again after resistance R 3 and the R4 parallel connection in the circuit.Thereby light illumination mode instructed voltage V
DimCan be expressed as V
Dim=Vref * (R3 * R4)/(R1 * R3+R1 * R4+R3 * R4).When the contact is connected with AC power in (L1-L2)-N mode, switch S 1 and S2 conducting simultaneously.At this moment, the dividing potential drop of connecting with R1 again after resistance R 2, R3 and the R4 parallel connection obtains light illumination mode instructed voltage V
Dim, be V
Dim=Vref * (R2 * R3 * R4)/(R1 * R2 * R3+R1 * R2 * R4+R1 * R3 * R4+R2 * R3 * R4).
This shows that in second kind of circuit shown in Fig. 4, owing to used the switch S 1 and the S2 of serial connection, the variation of AC power can not cause V equally
DimVariation.In addition, because this circuit structure itself, corresponding to three kinds of connected modes of contact and AC power, V
DimOn amplitude, can obviously be divided into Three Estate.Thereby in circuit shown in Figure 4, more wide in range to the selection of resistance R 2 and R3 than Fig. 3.
According to thought of the present invention, more than provided two kinds and had single voltage source, the light illumination mode indicating circuit of realizing in resistance series and parallel dividing potential drop mode.The implementation of light illumination mode indicating circuit is not limited thereto, and can also comprise two or three voltage sources, perhaps adopts logical device to realize.Fig. 5 has just provided a kind of light illumination mode indicating circuit that constitutes with logical device.
As shown in Figure 5, three independently voltage source V ref1, Vref2 and Vref3 are arranged in this light illumination mode indicating circuit, be used to provide three different stable reference voltages.Contact L1 links to each other with the input 2 of NAND gate X1, X2 respectively, and the input 2 via not gate X8 and NAND gate X3 links to each other simultaneously.Contact L2 links to each other with the input 1 of NAND gate X2, X3 respectively, and the input 1 via not gate X7 and NAND gate X1 links to each other simultaneously.The output level of three NAND gate X1, X2 and X3 is used for driving switch S1, S2 and S3 respectively.The switch conduction of correspondence when NAND gate is output as low level, otherwise disconnect.Each switch one end is connected to the positive pole in correspondent voltage source, and the other end is connected to the common node 80 of three switches, the just output of light illumination mode instructed voltage.
For convenience of explanation, below with the level height of 0,1 expression each element or node.According to circuit shown in Figure 5, when the contact is connected with AC power in the L1-N mode, L1=1, L2=0, through the processing of logical circuit, NAND gate X1 is output as low, switch S 1 conducting, other switches keep off-state, light illumination mode instructed voltage V
DimVoltage for Vref1.When the contact is connected with AC power in the L2-N mode, L1=0, L2=1, then NAND gate X3 be output as low, switch S 3 conductings, other switches keep off-states, light illumination mode instructed voltage V
DimVoltage for Vref3.When the contact is connected in (L1-L2)-N mode with AC power, L1=1, L2=1, then NAND gate X2 be output as low, switch S 2 conductings, other switches keep off-states, light illumination mode instructed voltage V
DimVoltage for Vref2.
This shows, in circuit shown in Figure 5, logic gates X1～X3, X7 and X8 are converted to three independently connection status with three kinds of connected modes of contact L1, L2 and N and AC power, with three corresponding with it independent switches of control, and each switch is connected with a voltage source uniquely.Thereby corresponding different connected modes, light illumination mode instructed voltage can be uniquely provided by the output voltage of a stable voltage source.In addition, circuit shown in Figure 5 can also freely be selected the voltage of voltage source, has significant difference between the voltage with abundant each voltage source of assurance.Therefore this method has more flexibly and characteristic of accurate than aforesaid two kinds of circuit.
Certainly,, can also utilize one or two voltage source to obtain three reference voltages, equally also can utilize two switches to realize the selection of reference voltage by circuit network based on circuit designing thought shown in Figure 5.
More than based on core concept of the present invention, provided the topological structure of three kinds of light illumination mode indicating circuits respectively.Circuit structure described above can be applied in the actual three-way light adjusting system easily.How describe second kind of circuit structure proposed by the invention in detail below in conjunction with accompanying drawing 6 realizes in side circuit.
As shown in Figure 6, contact L2 is connected to the node 11 between diode D1 and the D3, and contact L1 is connected to the node 21 between diode D2 and the D4, and contact N is connected with the node 30 that cushions between electrochemical capacitor C1 and the C2.With similar shown in Figure 2, diode D1～D4 and buffering electrochemical capacitor C1, C2 constitute bridge voltage-double rectification circuit, make dc output end V
DcVoltage double the voltage of AC power.
Among Fig. 6, triode Q1 and Q2 for respectively via potential-divider network by contact L1 and L2 switch driven element.Contact L1 is connected with the anode of diode D5, and the negative electrode of D5 is connected to resistance R 11-T1 and the capacitor C that connects with parallel way via resistance R 10-T1
Buf-T1.Thereby, when contact L1 is connected with the 120V AC power, the direct voltage after can obtaining halfwave rectifier at the negative electrode of D5.Simultaneously R10-T1 and R11-T1 can realize the dividing potential drop of connecting, and the direct voltage after this rectification (120V) is converted to the direct voltage of 15V, are used for via the resistance R on the node 41 that is connected between R10-T1 and the R11-T1
b1 base stage for triode Q1 provides driving voltage.Here buffer capacitor C
BufThe effect of-T1 is the ripple of direct voltage behind the filtering rectifying and wave-filtering.In like manner, the diode D6 that is connected with node 11 (contact L2) of anode is connected to resistance R 11-T2 and the capacitor C that connects with parallel way via resistance R 10-T2
Buf-T2.And the direct voltage after 51 places of the node between R10-T2 and the R11-T2 obtain rectification and voltage division, this direct voltage is via the base drive resistance R
b2 provide cut-in voltage for triode Q2.
Among Fig. 6, voltage source V ref can be the direct voltage that is provided by IC (such as the UBA2014 of ST L6574 or PHILIPS Co.).Voltage source V ref and resistance R 1～R4, and triode Q1 and the common light illumination mode indicating circuit that constitutes as shown in Figure 4 of Q2.Light illumination mode instructed voltage output is connected to the common node 70 of R1～R4.According to circuit theory diagrams shown in Figure 6, when the contact was connected in the L1-N mode with AC power, alternating voltage was through D5, resistance R 10-T1, resistance R 11-T1 and capacitor C
BufThe processing of the rectification and voltage division network that-T1 formed for Q1 provides cut-in voltage, makes the Q1 conducting.At this moment, because the L2 sky connects, Q2 is in by state.Therefore, V
DimObtain by resistance R 1 and R4 dividing potential drop.When the contact was connected in the L2-N mode with AC power, alternating current was through D6, resistance R 10-T2, resistance R 11-T2 and capacitor C
BufThe rectification and voltage division network that-T2 formed for Q2 provides cut-in voltage, makes the Q2 conducting.At this moment, because the L1 sky connects, Q1 is in by state.So V
DimBy resistance R 1, R3 and R4 decision.When the contact is connected in (L1-L2)-N mode with AC power, Q1 and Q2 conducting simultaneously, light illumination mode instructed voltage V
DimDetermine by resistance R 1～R4.
Be not difficult to find out that by above the method for the guidance lighting pattern that the present invention proposes comprises: the annexation of monitoring contact and AC power, and generate the monitor signal corresponding with this annexation; Utilize this monitor signal driving switch to be in conducting or end; State according to switch, control device (comprising switch and the circuit part that is used for being connected this switch and described voltage source) generates the method for the instructed voltage corresponding with selected light illumination mode from stable voltage source, this instructed voltage (control signal) is used for selected light illumination mode is indicated to the subsequent drive circuit, makes light output can meet lighting requirement.Wherein, the effect of switch is according to selected light illumination mode, regulates the size of light illumination mode instructed voltage.
Beneficial effect:
Below describe thought of the present invention in detail with specific embodiment in conjunction with the accompanying drawings.Substitute the resistance that is used for current detecting in the existing product with switch element in the present invention, thereby avoided the influence of the variation of AC power light illumination mode indicating circuit output result.The independently voltage source of introducing in the light illumination mode indicating circuit simultaneously proposed by the invention is to provide independent, stable reference voltage.Based on above 2 points, light illumination mode indicating circuit proposed by the invention can provide reliable and stable light illumination mode instructed voltage, so that the operating frequency and the power of the fluorescent lamp that the resonant circuit that follow-up light adjusting circuit can utilize this light illumination mode instructed voltage accurately to regulate CFL is exported make the light in whole lamp source export stable and consistent.
Light illumination mode indicating circuit with steady illumination mode instructed voltage proposed by the invention can be applied in the three-way light adjusting system of Unite States Standard.Though above description all is that the electric ballast with CFL is a specific embodiment, the light illumination mode indicating circuit that the present invention proposes not only can be applied to fluorescent lamp, can also be applied in the other types lamp source.
It will be appreciated by those skilled in the art that disclosed in this inventionly, can on the basis that does not break away from content of the present invention, make various improvement in light illumination mode indicating circuit and method.Therefore, protection scope of the present invention should be determined by the content of appending claims.
Claims (21)
1, monitoring light is provided with the circuit of pattern, is used for monitoring a light illumination mode that Dimmable lighting system is set, and this circuit comprises:
A monitoring device is used to monitor set light illumination mode, produces a corresponding monitor signal; With
A control device is used for producing a control signal according to described monitor signal, and this control signal is corresponding to described light illumination mode, so that described system enters described light illumination mode work according to this control signal.
2, circuit according to claim 1, wherein, described monitoring device produces described monitor signal by the input signal of monitoring said system.
3, as circuit as described in the claim 2, described input signal comprises the current signal of input.
4, as circuit as described in the claim 1,2 or 3, wherein, described control signal is not subjected to described system input signal influence of fluctuations.
5, as circuit as described in the claim 1,2 or 3, wherein, described control device comprises:
A switching device is used for carrying out corresponding work according to described monitor signal, and is corresponding with described light illumination mode to regulate described control signal.
6, as circuit as described in the claim 5, wherein, described switching device comprises a current-controlled switch, is opened and is closed by described monitor signal control.
7, as circuit as described in claim 5 or 6, wherein, when described Dimmable lighting system is a three-way lighting dimming system, wherein, described control device comprises another switching device, described two switching devices are used for carrying out corresponding work according to described monitor signal, and are corresponding with described light illumination mode to regulate described control signal.
8, as circuit as described in the claim 1,2 or 3, wherein, described control device comprises an adjusting device, and it is corresponding with described light illumination mode to be used for regulating described control signal according to described monitor signal.
9, a Dimmable lighting system is used to adjust the output of lighting device, and this system comprises:
A monitoring light is provided with the circuit of pattern, and this circuit comprises:
A monitoring device is used to monitor set light illumination mode, produce a corresponding monitor signal and
A control device is used for producing a control signal according to described monitor signal, and this control signal is corresponding to described light illumination mode; And
A drive unit is used for controlling this lighting device according to described control signal, makes this lighting device with described light illumination mode work.
10, as system as described in the claim 9, wherein, described control device further comprises:
A switching device is used for carrying out corresponding work according to described monitor signal, and is corresponding with described light illumination mode to regulate described control signal.
11, as system as described in the claim 9, wherein, described monitoring device produces described monitor signal by the input signal of monitoring said system.
12, a kind of method of monitoring the pattern that is provided with of throwing light in the Dimmable lighting system, this method comprises:
(a) the set light illumination mode of monitoring produces a corresponding monitor signal; With
(b) produce a control signal according to described monitor signal, this control signal is corresponding to described light illumination mode, so that described Dimmable lighting system enters described light illumination mode work according to this control signal.
13, method as claimed in claim 12, wherein, step (a) comprising: the input signal of monitoring said system produces described monitor signal.
14, method as claimed in claim 12, wherein, step (b) comprising: regulate described control signal so that this control signal is corresponding with described light illumination mode according to described monitor signal.
15, method as claimed in claim 14, wherein, described regulating step comprises the described control signal of switching.
16, a kind of light illumination mode indicating device comprises:
A plurality of links are used for the needs according to brightness of illumination, are connected with AC power with predetermined connected mode;
An index signal generation module is used for according to this connected mode, produces an output signal that is independent of this AC power fluctuation with the expression light illumination mode.
17, device as claimed in claim 16, wherein, described index signal generation module comprises:
At least one voltage stabilizing circuit is used to provide a reference voltage;
Select module for one, be used for, produce a suitable numerical value, thereby correspondingly generate the output signal of described expression light illumination mode by this reference voltage according to described connected mode.
18, device as claimed in claim 17, wherein said selection module comprises bleeder circuit, the magnitude of voltage corresponding to described connected mode that dividing potential drop obtains from described reference voltage generates described suitable numerical value.
19, device as claimed in claim 18, wherein said selection module comprises:
At least one switch block;
A plurality of minutes pressure parts;
Wherein, this switch block is according to described connected mode, selects the corresponding output voltage that divides pressure part, with as described suitable numerical value.
20, device as claimed in claim 17, wherein said selection module comprises logical circuit, corresponding to a magnitude of voltage of described connected mode, generates described suitable numerical value in the described reference voltage.
21, device as claimed in claim 20, wherein said selection module comprises:
At least one switch block;
A plurality of logical blocks;
Wherein, according to described connected mode, these a plurality of logical blocks make this switch block can select in the described reference voltage corresponding numerical value as described suitable numerical value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410003347 CN1649462A (en) | 2004-01-21 | 2004-01-21 | Lighting mode indicator and indicating method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410003347 CN1649462A (en) | 2004-01-21 | 2004-01-21 | Lighting mode indicator and indicating method |
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| CN1649462A true CN1649462A (en) | 2005-08-03 |
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| CN 200410003347 Pending CN1649462A (en) | 2004-01-21 | 2004-01-21 | Lighting mode indicator and indicating method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101351073B (en) * | 2007-07-19 | 2013-01-09 | 鸿富锦精密工业（深圳）有限公司 | Apparatus for detecting and adjusting illuminating value |
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2004
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101351073B (en) * | 2007-07-19 | 2013-01-09 | 鸿富锦精密工业（深圳）有限公司 | Apparatus for detecting and adjusting illuminating value |
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