CN208549042U - Projector system and its driving device - Google Patents
Projector system and its driving device Download PDFInfo
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- CN208549042U CN208549042U CN201821200436.5U CN201821200436U CN208549042U CN 208549042 U CN208549042 U CN 208549042U CN 201821200436 U CN201821200436 U CN 201821200436U CN 208549042 U CN208549042 U CN 208549042U
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Abstract
The utility model relates to a kind of projector system and its driving devices.Driving device includes control signal generator, voltage quasi position isolator and power adapter.It controls signal generator and first control signal pair is provided.Voltage quasi position isolator has inlet circuit and circuit of output terminal.Inlet circuit receives first control signal pair, and circuit of output terminal is according to first control signal to generate second control signal pair.The voltage endurance of circuit of output terminal is higher than the voltage endurance of inlet circuit.Power adapter generates second source to convert the first power supply according to second control signal, and provides second source to drive light emitting device.The utility model can effectively drive the light emitting device of higher drive.
Description
Technical field
The utility model relates to a kind of projector systems and its driving device more particularly to one kind can be applied to high driving electricity
The driving device of the light emitting device of pressure.
Background technique
In the optical projection system of high-order, the demand of light source is higher and higher, thus the quantity of light source is also more and more.Such one
Come, the volume needs that a greater number of light sources will cause optical projection system are increased, and also result in the rising of cost.
In existing technical field, by the quantity for reducing laser diode string, but increase in each laser diode string
The quantity of laser diode, and increase the driving voltage of corresponding each laser diode string, the demand in Lai Yinying light source design,
In driving voltage generated by power adapter.Under the premise of such, based on institute on laser diode string (load end)
The phenomenon that voltage of receiving increases, the control signal generator for providing driving power converter control signal can be because afford phase
The situation of voltage endurance capability deficiency is generated to high voltage.If promoting the voltage endurance capability of control signal generator thus, can make
At the rising of projector system cost.
This " background technique " is partially used only to help to understand the content of the present invention, therefore in " background technique " part institute
The content of exposure may be comprising some without constituting the prior art known to those of ordinary skill in technical field.?
Content disclosed by " background technique " part, does not represent the content or the utility model one or more embodiment to be solved
The problem of, known or recognized by those of ordinary skill in technical field before the present utility model application.
Summary of the invention
The utility model provides a kind of projector system and its driving device, can effectively drive shining for higher drive
Device.
The other objects and advantages of the utility model can be obtained from the technical characteristic disclosed by the utility model into one
The understanding of step.
It is to realize one of above-mentioned or purpose or other purposes partially or in whole, the driving of one of the utility model embodiment
Device is for driving light emitting device.Driving device includes control signal generator, voltage quasi position isolator and power adapter.
It controls signal generator and first control signal pair is provided.Voltage quasi position isolator has inlet circuit and circuit of output terminal.
Inlet circuit receives first control signal pair, and circuit of output terminal is according to first control signal to generate second control signal
It is right.The voltage endurance of circuit of output terminal is higher than the voltage endurance of inlet circuit.Power adapter is according to the second control letter
Number second source is generated to convert the first power supply, and provides second source to drive light emitting device.
It is to realize one of above-mentioned or purpose or other purposes partially or in whole, the projection of one of the utility model embodiment
Machine system includes camera lens, light emitting device and driving device as described above.Light emitting device includes at least one diode string, and
Output beam is projected to camera lens.
Based on above-mentioned, the control signal that low-pressure end is isolated by voltage quasi position isolator for the embodiments of the present invention is produced
The power adapter of raw device and high-voltage end can make to control the height that signal generator can not be subjected in power adapter as a result,
Voltage prevents control signal generator to be burned out and maintain the state that can be worked normally.In this way, be connect when on power adapter
When the voltage value of receipts increases, driving device can still maintain normally to act.
In order to make the above-mentioned features and advantages of the utility model more obvious and understandable, special embodiment below, and cooperate attached drawing
It is described in detail below.
Detailed description of the invention
Fig. 1 shows the schematic diagram of the driving device of an embodiment of the present invention.
Fig. 2 shows the embodiments of the power adapter of the utility model embodiment.
Fig. 3 shows the schematic diagram of the embodiment of the voltage quasi position isolator of the utility model embodiment.
Fig. 4 shows the schematic diagram of the driving device of another embodiment of the utility model.
Fig. 5 shows the schematic diagram of the optical projection system of an embodiment of the present invention.
Fig. 6 shows the flow chart of the driving method of the light emitting device of an embodiment of the present invention.
Specific embodiment
In relation to addressing other technologies content, feature and effect before the utility model, in the preferable real of following cooperation attached drawing
It applies in the detailed description of example, can clearly present.The direction term being previously mentioned in following embodiment, such as: upper and lower, left,
It is right, front or rear etc., it is only the direction with reference to attached drawing.Therefore, the direction term used is not to be used to limit this for illustrating
Utility model.
Fig. 1 is please referred to, Fig. 1 shows the schematic diagram of the driving device of an embodiment of the present invention.Driving device 100 includes
Control signal generator 110, voltage quasi position isolator 120 and power adapter 130.Driving device 100 is luminous for driving
Device 140.Light emitting device 140 can be by multiple diodes (such as laser diode or light emitting diode) string (string) institute
It constitutes, but not limited to this.
Signal generator 110 is controlled to provide the first control signal pair being made of control signal CTH and CTL.
Voltage quasi position isolator 120 then has inlet circuit 121 and circuit of output terminal 122.In the present embodiment, inlet circuit
121 receive control signal CTH and CTL (first control signal to), and circuit of output terminal 122 is then according to first control signal pair
(CTH and CTL) is to generate the second control signal pair being made of control signal DRH and DRL.It is worth noting that, output
The voltage endurance of terminal circuit 122 is higher than the voltage endurance of inlet circuit 121.
Specifically bright, inlet circuit 121 is made of the relatively low circuit element of voltage endurance, and to generate
Control signal CTH and CTL.Inlet circuit 121 is handled for control signal CTH and CTL, and makes circuit of output terminal
122 generate control signal DRH and DRL according to control signal CTH and CTL respectively.It is coupled based on circuit of output terminal 122
To the power adapter 130 for the voltage signal that can receive opposing high voltage potentials value, therefore, circuit of output terminal 122 is opposite by having
The source element of high voltage tolerance level designs.In this way, using the isolation effect of voltage quasi position isolator 120, control letter
Number generator 110 can not have to afford the voltage signal in power adapter 130 with opposing high voltage potentials value.Signal is controlled to produce
Raw device 110 can be used low pressure-resistant element and be designed, to reduce required circuit cost.
Power adapter 130 receives control signal DRH and DRL (second control signal to), according to control signal DRH with
And DRL (is detailed later) Lai Zhihang voltage switching motion to be directed to the first power supply, and uses and generate power supply Vout (second source).
In the present embodiment, the voltage value of the first power supply is greater than the voltage value of second source.In the present embodiment, power adapter 130
It can be buck (Buck) power adapter (power converter), for the first power supply with opposing high voltage potentials value
Buck power supply switching motion is executed, and generates the power supply Vout (second source) with relative low voltage value.
Power adapter 130 provides power supply Vout (second source) to light emitting device 140, and drive light emitting device 140 with
Generate light beam.
Below referring to figure 2., Fig. 2 shows the embodiments of the power adapter of the utility model embodiment.Power supply conversion
Device 200 includes transistor T1, T2, inductance L1 and capacitor C1.The first end of transistor T1 receives power supply Vin (the first power supply),
The second end of transistor T1 is coupled to center-side SW, and the control terminal of transistor T1 then receives control signal DRH (second control signal
The high-end control signal of centering).The first end of transistor T2 is coupled to center-side SW, and the second end of transistor T2 is coupled to reference
Ground terminal GND, the control terminal of transistor T2 then receive control signal DRL (the low side control signal of second control signal centering).
In addition, the first end of inductance L1 is coupled to center-side SW, the second end of inductance L1 generates power supply Vout (second source).Capacitor
C1 is electric capacity of voltage regulation, is coupled in the second end of inductance L1 and with reference between ground terminal GND.
In the present embodiment, power adapter 200 receive control signal DRH and DRL, according to control signal DRH and
DRL uses generation lower voltage to be directed to power supply Vin (the first power supply) Lai Zhihang voltage switching motion of higher voltage value
The power supply Vout (second source) of value.In detail, power adapter 200 execute power supply switching motion when, transistor T1 with
And T2 is respectively according to the staggered conducting of control signal DRH and DRL and disconnection, generates power supply Vout with conversion electric power Vin.?
In one embodiment, the voltage value of power supply Vin for example can be 100 volts, and the voltage value of power supply Vout for example can be 60 volts
It is special.
It is noted that provide the control signal DRH and DRL with appropriate voltage value to respectively drive crystal
Pipe T1 and T2, center-side SW are coupled to the output end of voltage quasi position isolator (the voltage quasi position isolator 120 of example as shown in figure 1)
Circuit (circuit of output terminal 122 of example as shown in figure 1).Also therefore, the high-voltage value that may have on center-side SW, which has, to be applied
To circuit of output terminal.And by high voltage element be arranged circuit of output terminal, by can not by the voltage on center-side SW and
The phenomenon that raw damage, and normal operation can be maintained.
Below referring to figure 3., Fig. 3 shows the signal of the embodiment of the voltage quasi position isolator of the utility model embodiment
Figure.Voltage quasi position isolator 300 includes by buffer BUF1, BUF2, level-shift device (level shifter) 330, under-voltage
The input terminal electricity that lock-in circuit (under voltage lock-out circuit) 350 and logical-arithmetic unit 340 are constituted
Road, voltage quasi position isolator 300 include separately the circuit of output terminal being made of output driver 310 and 320.Buffer
BUF1, BUF2 receive control signal CTH and CTL respectively, and provide buffering signals BCTH and BCTL respectively to level-shift
Device 330.In the present embodiment, buffer BUF1, BUF2 is all magnetic hysteresis type buffer, but not limited to this.Level-shift device 330
Buffering signals BCTH and BCTL are received, and is deviated for the voltage value of buffering signals BCTH and BCTL, to produce respectively
Raw voltage offseting signal LV1 and LV2.In the present embodiment, undervoltage lockout circuit 350 receives pull-up (pull-up) power supply
VDD1 and power vd D2 (third power supply), and the height according to the voltage value for judging pull-up power supply VDD1 and power vd D2
To generate locking signal UVLO.It may also be said that undervoltage lockout circuit 350 detects pull-up power supply VDD1 and power vd D2 (third
Power supply) voltage it is whether too low to generate locking signal UVLO.In the present embodiment, on undervoltage lockout circuit 350 is judged
When drawing at least one of voltage value in power vd D1 and power vd D2 not high enough, then locking signal is accordingly generated
UVLO。
In implementation detail, settable voltage comparator circuit in undervoltage lockout circuit 350, with for pull-up power supply VDD1 with
And the voltage value of power vd D2 is compared with preset standard value, and is used and generated locking signal UVLO.Voltage is more electric
Lu Zeke is implemented using voltage comparator circuit well known within the skill of those ordinarily skilled, is not particularly limited.
Logical-arithmetic unit 340 executes operation with voltage offseting signal LV1, LV2 respectively for locking signal UVLO with respectively
Generate signal A1 and A2.Signal A1 and A2 are respectively transmitted to output driver 310 and 320, to control output driver 310
And 320 running.
Subsidiary one is mentioned that, when at least one of voltage value in pull-up power supply VDD1 and power vd D2 is not high enough
When, logical-arithmetic unit 340 can generate signal A1, A2 according to locking signal UVLO, and make output driver by signal A1, A2
310 and 320 is locked without executing movement.
It may include one or more logic gate and/or flip-flop, the latch unit of logic circuit etc. in logical-arithmetic unit 340
Logic circuit component.The composition of logic circuit component in logical-arithmetic unit 340 can be ripe by those of ordinary skill in the art institute
The Logic Circuit Design mode known is completed, and is not limited specifically.
In the present embodiment, pull-up power supply VDD1 is provided by pull-up circuit 301.Pull-up circuit 301 includes diode
DBOOTAnd capacitor CBOOT, and it is coupled to center-side SW and output driver 310.The diode D of pull-up circuit 301BOOTSun
Pole receives bootlace (boot strap) voltage VBOOT, diode DBOOTCathode be coupled to output driver 310 and capacitor CBOOT
One end.In the present embodiment, diode DBOOTCathode provide pull-up power supply VDD1.Capacitor CBOOTThe other end be then coupled to
Center-side SW.It is reference voltage, the diode D of pull-up circuit 301 based on the voltage on center-side SWBOOTAccording to bootlace voltage
VBOOTWith generation/offer pull-up power supply VDD1 to output driver 310.Based on pull-up power supply VDD1, output driver 310 then may be used
Basis signal A1 controls signal DRH (high-end control signal) to generate.
In the present embodiment, output driver 310 includes transistor M1 and M2.The transistor of output driver 310
M1 and M2 is coupled in series between pull-up power supply VDD1 and center-side SW.In the present embodiment, the first end of transistor M1
Pull-up power supply VDD1 is received, the second end of transistor M1 generates control signal DRH (the high-end control of second control signal centering
Signal).In the present embodiment, the first end of transistor M2 is coupled to the second end of transistor M1, the second end coupling of transistor M2
It is connected to center-side SW.The control terminal of transistor M1 and M2 are mutually coupled, and receive signal A1.Output driver 310 and foundation
Signal A1 is to generate control signal DRH.On the other hand, output driver 320 includes transistor M3 and M4.Output driver
320 transistor M3 and M4 is coupled in series in power vd D2 (third power supply) and with reference between ground terminal GND.In this implementation
In example, the first end of transistor M3 receives power vd D2 (third power supply), and the second end of transistor M3 generates control signal DRL
(low side of second control signal centering controls signal).In the present embodiment, the first end of transistor M4 is coupled to transistor M3
Second end, the second end of transistor M4 is coupled to reference to ground terminal GND.The control terminal of transistor M3 and M4 be mutually coupled with
Receive signal A2.320 basis signal A2 of output driver is to generate control signal DRL (low side control signal).
In the present embodiment, the voltage value for controlling signal DRH can be on pull-up power supply VDD1 and center-side SW
Transition between voltage, the voltage value for controlling signal DRL can turn in power vd D2 and with reference between the voltage on ground terminal GND
State.
Below referring to Fig. 3 and Fig. 4, wherein Fig. 4 shows showing for the driving device of another embodiment of the utility model
It is intended to.Driving device 400 includes control signal generator 410, voltage quasi position isolator 420 and power adapter 430.Driving
Device 400 is to drive light emitting device 440.It controls signal generator 410 and receives power supply VC1 using as operation power.Capacitor C2
As electric capacity of voltage regulation, and it is coupled in series between power supply VC1 and reference ground terminal GND1.Signal generator 410 is controlled by two
Pole pipe D1 receives power supply VC1, enable voltage of the power supply VC1 as control signal CTH.In addition, diode D2 and capacitor C21 institute
The pull-up circuit of formation is coupled to control signal generator 410, and according to reference voltage VC2 to provide upper pull-up voltage to controlling letter
Number generator 410, and the high voltage level to set control signal CTH.In the present embodiment, the anode of diode D2 connects
Reference voltage VC2 is received, capacitor C21 is then coupled in series in the cathode of diode D2 and with reference between ground terminal GND1.
Voltage quasi position isolator 420 receives control signal CTH and CTL, and receives power supply VC3 using as operation power.
Capacitor C4 is electric capacity of voltage regulation, and is coupled in series between power supply VC3 and reference ground terminal GND1.Voltage quasi position isolator 420
Separately by diode D3 to receive power supply VC3.In the present embodiment, the cathode of diode D3 can provide bootlace voltage, and to
The high-voltage value of setting control signal DRH.
On the other hand, capacitor C5 is coupled in series between the cathode and center-side SW of diode D3, capacitor C5 and
Diode D3 forms pull-up circuit.
It separately include capacitor C3, resistance R1 and diode D4, resistance R1 and two on the conducting wire of transmission of control signals CTH
Pole pipe D4 coupled in parallel.In the present embodiment, capacitor C3 is coupled in series in the first buffer of voltage quasi position isolator 420
Between endpoint E1 receives the path of control signal CTH, resistance R1 is coupled between control signal CTH and reference ground terminal GND1, and two
The cathode of pole pipe D4 is coupled to the endpoint E1 of the first buffer to receive control signal CTH, and the anode of diode D4 is then coupled to
With reference to ground terminal GND1.In addition, another includes the endpoint E2 for being coupled in the second buffer on the conducting wire of transmission of control signals CTL
With the resistance R2 between reference ground terminal GND1.
On the other hand, on the conducting wire of transmission of control signals DRH, another resistance R3, R4 and in parallel with resistance R4 of being arranged
The diode D5 of coupling.On the conducting wire of transmission of control signals DRL, then resistance R5, R6 and coupling in parallel with resistance R6 are separately set
The diode D6 connect.
Power adapter 430 includes the transistor T1 and T2, inductance L1 and capacitor C7 of coupled in series.Resistance R3 series connection
It is coupled between the control terminal of endpoint E3 and transistor T1 of the first output driver, resistance R4 is coupled in series in transistor T1
Control terminal and center-side SW between, resistance R5 is coupled in series in the control of the endpoint E4 and transistor T2 of the second output driver
Between end processed, resistance R6 is coupled in series in the control terminal of transistor T2 and with reference between ground terminal GND2.The cathode of diode D5
It is coupled to the control terminal of transistor T1, the anode of diode D5 is coupled to center-side SW, and the cathode of diode D6 is coupled to crystal
The control terminal of pipe T2, the anode of diode D6 are coupled to reference to ground terminal GND2.Transistor T1 and T2 are coupled in series in power supply
Between Vin and reference ground terminal GND2, and control signal DRH and DRL is controlled by execute switching action.By crystalline substance
The switching action of body pipe T1 and T2, power adapter 430 generate power supply Vout to drive light emitting device 440.
In the present embodiment, light emitting device 440 includes multiple 1~LDN of laser diode LD, but not limited to this.Laser two
Pole pipe LD1~LDN is serially connected coupling, and according to the received power supply Vout of institute to generate light beam.In other embodiments, it shines
Device 440 may also comprise it is multiple be serially connected coupling and according to received power supply Vout to generate the light emitting diode of light beam,
But still it is without being limited thereto.
Referring to figure 5., Fig. 5 shows the schematic diagram of the optical projection system of an embodiment of the present invention.Optical projection system 500 includes
Driving device 510, light emitting device 520 and camera lens 530, light emitting device 520 project output beam to camera lens 530.Driving device
510 can implement according to the driving device 100 and 400 of previous embodiment.Driving device 510 generates power supply Vout, and provides electricity
Source Vout is to light emitting device 520.Light emitting device 520 generates light beam LB according to power supply Vout, and provides light beam LB to camera lens 530.
Fig. 6 is please referred to, Fig. 6 shows the flow chart of the driving method of the light emitting device of an embodiment of the present invention.Step
S610 provides control signal generator to generate first control signal pair.Step S620 provides voltage quasi position isolator, by electricity
The inlet circuit of level isolator is pressed to receive first control signal pair, by the circuit of output terminal foundation of voltage quasi position isolator
First control signal is to generate second control signal pair, wherein the voltage endurance of circuit of output terminal is higher than inlet circuit
Voltage endurance.Step S630 provides power adapter to generate the to convert the first power supply according to second control signal
Two power supplys, and second source is provided to drive light emitting device.
About the implementation detail of above-mentioned steps, there is detailed explanation in multiple embodiments above-mentioned and embodiment,
This without repeating more.
In conclusion the control signal of low-pressure system is isolated using voltage quasi position isolator for the embodiments of the present invention
The power adapter of generator and high-pressure system.In this way, power adapter received power supply voltage value improve
When, driving device can keep normally operating, and the cost of holding circuit will not rise.
Only as described above, the only preferred embodiment of the utility model, when the utility model cannot be limited with this
The range of implementation, i.e., the simple equivalence changes made generally according to claims of the utility model and description with repair
Decorations, all still belong in the range that the utility model patent covers.In addition any embodiment of the utility model or claims are not
The disclosed whole purpose of the utility model or advantage or feature must be reached.In addition, abstract part and title are intended merely to assist
Patent document search is used, and not is used to limit the interest field of the utility model.In addition, in this specification or claims
The terms such as " first " that refers to, " second " only to name the title or the different embodiments of difference or range of element (element),
And not it is used to limit the upper limit or lower limit in component count.
[symbol description]
100,400,510: driving device
110,410: control signal generator
120,300,420: voltage quasi position isolator
121: inlet circuit
122: circuit of output terminal
130,200: power adapter
140,440,520: light emitting device
500: optical projection system
530: camera lens
CTH, CTL, DRH, DRL: control signal
Vin, Vout, VDD2, VC1, VC2: power supply
T1, T2: transistor
L1: inductance
C1~C7, C21, CBOOT: capacitor
DBOOT, D1~D6: diode
R1~R6: resistance
SW: center-side
GND, GND1, GND2: ground terminal is referred to
BUF1, BUF2: buffer
330: level-shift device
350: undervoltage lockout circuit
340: logical-arithmetic unit
BCTH, BCTL: buffering signals
LV1, LV2: voltage offseting signal
VDD1: pull-up power supply
UVLO: locking signal
A1, A2: signal
LED1~LEDN: light emitting diode
LB: light beam
S610~S630: the actuation step of light emitting device.
Claims (27)
1. a kind of driving device, for driving light emitting device, which is characterized in that the driving device includes:
Signal generator is controlled, first control signal pair is provided；
Voltage quasi position isolator, has inlet circuit and circuit of output terminal, which receives the first control letter
Number right, the circuit of output terminal is according to the first control signal to generate second control signal pair, wherein the circuit of output terminal
Voltage endurance is higher than the voltage endurance of the inlet circuit；And
Power adapter generates second source to convert the first power supply according to the second control signal, and provide this second
Power supply is to drive the light emitting device.
2. driving device as described in claim 1, which is characterized in that the power adapter includes:
The first transistor, the first end of the first transistor receive first power supply, during the second end of the first transistor is connected to
Heart end, the control terminal of the first transistor receive the high-end control signal of the second control signal centering；
Second transistor, the first end of the second transistor are coupled to the center-side, and the second end of the second transistor is coupled to
First refers to ground terminal, and the control terminal of the second transistor receives the low side control signal of the second control signal centering；And
Inductance, the first end of the inductance are coupled to the center-side, and the second end of the inductance generates the second source.
3. driving device as claimed in claim 2, which is characterized in that the power adapter executes drop for first power supply
Piezoelectricity presses switching motion to generate the second source, and wherein the voltage value of first power supply is greater than the voltage value of the second source.
4. driving device as claimed in claim 2, which is characterized in that the circuit of output terminal includes:
First output driver is coupled between pull-up power supply and the center-side, according in the pull-up power supply, the center-side
Voltage and the first signal of the first control signal pair are to generate the high-end control signal；And
Second output driver is coupled between third power supply and the second reference ground terminal, according to the voltage in the center-side
And the second signal of the first control signal pair is to generate low side control signal.
5. driving device as claimed in claim 4, which is characterized in that the driving device further include:
Pull-up circuit, is coupled to first output driver and the center-side, receives bootlace voltage, according to the bootlace voltage with
Generate the pull-up power supply.
6. driving device as claimed in claim 5, which is characterized in that the pull-up circuit includes:
Diode, the anode of the diode receive the bootlace voltage, and the cathode of the diode provides the pull-up power supply；And
Capacitor is coupled in series between the cathode and the center-side of the diode.
7. driving device as claimed in claim 4, which is characterized in that the inlet circuit includes:
First buffer receives first signal, and provides the first buffering signals；
Second buffer receives the second signal, and provides the second buffering signals；
Level-shift device deviates first buffering signals and second buffering signals to generate first voltage shifted signal respectively
And second voltage shifted signal；
Undervoltage lockout circuit, whether the voltage for detecting the pull-up power supply and the third power supply is too low, to generate locking signal；With
And
Logical-arithmetic unit is held with the first voltage shifted signal and the second voltage shifted signal respectively for the locking signal
Row operation to generate third signal and fourth signal respectively；
Wherein, the third signal and the fourth signal are provided to first output driver and second output driving respectively
The control terminal of device.
8. driving device as claimed in claim 7, which is characterized in that first output driver includes:
Third transistor, the first end of the third transistor receive the pull-up power supply, and the second end of the third transistor generates should
High-end control signal, the control terminal of the third transistor receive the third signal；And
4th transistor, the first end of the 4th transistor are coupled to the second end of the third transistor, the 4th transistor
Second end is coupled to the center-side, and the control terminal of the 4th transistor receives the third signal.
9. driving device as claimed in claim 7, which is characterized in that second output driver includes:
Third transistor, the first end of the third transistor receive the third power supply, and the second end of the third transistor generates should
Low side controls signal, and the control terminal of the third transistor receives the fourth signal；And
4th transistor, the first end of the 4th transistor are coupled to the second end of the 4th transistor, the 4th transistor
Second end is coupled to this second with reference to ground terminal, and the control terminal of the 4th transistor receives the fourth signal.
10. driving device as claimed in claim 7, which is characterized in that first buffer and second buffer are magnetic
Stagnant type buffer.
11. driving device as claimed in claim 7, which is characterized in that the driving device further include:
Diode, cathode are coupled to first buffer, and anode is coupled to third with reference to ground terminal；
First resistor is coupled with the diodes in parallel；
Second resistance is coupled in second buffer and the third with reference between ground terminal；And
Capacitor is coupled in series between the path that first buffer receives first signal.
12. driving device as claimed in claim 7, which is characterized in that the driving device further include:
Pull-up circuit is coupled to the control signal generator, to set the voltage quasi position of first signal.
13. driving device as claimed in claim 12, which is characterized in that the pull-up circuit includes:
The anode of diode, the diode receives reference voltage；And
Capacitor, the cathode for being coupled in series in the diode and third are with reference between ground terminal.
14. driving device as claimed in claim 4, which is characterized in that the driving device further include:
First resistor is coupled in series between first output driver and the control terminal of the first transistor；
Second resistance is coupled in series between the control terminal of the first transistor and the center-side；
3rd resistor is coupled in series between second output driver and the control terminal of the second transistor；
4th resistance is coupled in series between the control terminal of the second transistor and the second reference ground terminal；
First diode, the cathode of the first diode are coupled to the control terminal of the first transistor, the sun of the first diode
Pole is coupled to the center-side；And
The cathode of second diode, second diode is coupled to the control terminal of the second transistor, the sun of second diode
Pole is coupled to this second with reference to ground terminal.
15. driving device as described in claim 1, which is characterized in that the light emitting device includes at least one laser diode
String or at least one light emitting diode string.
16. a kind of projector system, which is characterized in that the projector system includes camera lens, light emitting device and driving device,
In:
The light emitting device includes at least one diode string, projects output beam to the camera lens；And
For the driving device for driving the light emitting device, which includes control signal generator, voltage quasi position isolator
And power adapter, in which:
The control signal generator provides first control signal pair；
The voltage quasi position isolator has inlet circuit and circuit of output terminal, which receives the first control letter
Number right, the circuit of output terminal is according to the first control signal to generate second control signal pair, wherein the circuit of output terminal
Voltage endurance is higher than the voltage endurance of the inlet circuit；And
The power adapter generates second source to convert the first power supply according to the second control signal, and provide this second
Power supply is to drive the light emitting device.
17. projector system as claimed in claim 16, which is characterized in that the power adapter includes:
The first transistor, the first end of the first transistor receive first power supply, during the second end of the first transistor is connected to
Heart end, the control terminal of the first transistor receive the high-end control signal of the second control signal centering；
Second transistor, the first end of the second transistor are coupled to the center-side, and the second end of the second transistor is coupled to
First refers to ground terminal, and the control terminal of the second transistor receives the low side control signal of the second control signal centering；And
Inductance, the first end of the inductance are coupled to the center-side, and the second end of the inductance generates the second source.
18. projector system as claimed in claim 17, which is characterized in that the power adapter is held for first power supply
Row step-down voltage switching motion is to generate the second source, and wherein the voltage value of first power supply is greater than the voltage of the second source
Value.
19. projector system as claimed in claim 17, which is characterized in that the circuit of output terminal includes:
First output driver is coupled between pull-up power supply and the center-side, according in the pull-up power supply, the center-side
Voltage and the first signal of the first control signal pair are to generate the high-end control signal；And
Second output driver is coupled between third power supply and the second reference ground terminal, according to the voltage in the center-side
And the second signal of the first control signal pair is to generate low side control signal.
20. projector system as claimed in claim 19, which is characterized in that the driving device further include:
Pull-up circuit, is coupled to first output driver and the center-side, receives bootlace voltage, according to the bootlace voltage with
Generate the pull-up power supply.
21. projector system as claimed in claim 20, which is characterized in that the pull-up circuit includes:
Diode, the anode of the diode receive the bootlace voltage, and the cathode of the diode provides the pull-up power supply；And
Capacitor is coupled in series between the cathode and the center-side of the diode.
22. projector system as claimed in claim 19, which is characterized in that the inlet circuit includes:
First buffer receives first signal, and provides the first buffering signals；
Second buffer receives the second signal, and provides the second buffering signals；
Level-shift device deviates first buffering signals and second buffering signals to generate first voltage shifted signal respectively
And second voltage shifted signal；
Undervoltage lockout circuit, whether the voltage for detecting the pull-up power supply and the third power supply is too low, to generate locking signal；With
And
Logical-arithmetic unit is held with the first voltage shifted signal and the second voltage shifted signal respectively for the locking signal
Row operation to generate third signal and fourth signal respectively；
Wherein, the third signal and the fourth signal are provided to first output driver and second output driving respectively
The control terminal of device.
23. projector system as claimed in claim 22, which is characterized in that first output driver includes:
Third transistor, the first end of the third transistor receive the pull-up power supply, and the second end of the third transistor generates should
High-end control signal, the control terminal of the third transistor receive the third signal；And
4th transistor, the first end of the 4th transistor are coupled to the second end of the third transistor, the 4th transistor
Second end is coupled to the center-side, and the control terminal of the 4th transistor receives the third signal.
24. projector system as claimed in claim 22, which is characterized in that second output driver includes:
Third transistor, the first end of the third transistor receive the third power supply, and the second end of the third transistor generates should
Low side controls signal, and the control terminal of the third transistor receives the fourth signal；And
4th transistor, the first end of the 4th transistor are coupled to the second end of the 4th transistor, the 4th transistor
Second end is coupled to this second with reference to ground terminal, and the control terminal of the 4th transistor receives the fourth signal.
25. projector system as claimed in claim 22, which is characterized in that first buffer and second buffer are
Magnetic hysteresis type buffer.
26. projector system as claimed in claim 22, which is characterized in that the driving device further include:
Pull-up circuit is coupled to the control signal generator, to set the voltage quasi position of first signal.
27. projector system as claimed in claim 26, which is characterized in that the pull-up circuit includes:
The anode of diode, the diode receives reference voltage；And
Capacitor, the cathode for being coupled in series in the diode and third are with reference between ground terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821200436.5U CN208549042U (en) | 2018-07-27 | 2018-07-27 | Projector system and its driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821200436.5U CN208549042U (en) | 2018-07-27 | 2018-07-27 | Projector system and its driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208549042U true CN208549042U (en) | 2019-02-26 |
Family
ID=65425460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821200436.5U Withdrawn - After Issue CN208549042U (en) | 2018-07-27 | 2018-07-27 | Projector system and its driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208549042U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110784952A (en) * | 2018-07-27 | 2020-02-11 | 中强光电股份有限公司 | Projector system, driving device and driving method of light-emitting device thereof |
| EP3734647A1 (en) * | 2019-05-03 | 2020-11-04 | Delta Electronics, Inc. | A driving circuit of a power circuit and a package structure thereof |
-
2018
- 2018-07-27 CN CN201821200436.5U patent/CN208549042U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110784952A (en) * | 2018-07-27 | 2020-02-11 | 中强光电股份有限公司 | Projector system, driving device and driving method of light-emitting device thereof |
| EP3734647A1 (en) * | 2019-05-03 | 2020-11-04 | Delta Electronics, Inc. | A driving circuit of a power circuit and a package structure thereof |
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