CN209373343U - Optical projection system - Google Patents
Optical projection system Download PDFInfo
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- CN209373343U CN209373343U CN201920252783.0U CN201920252783U CN209373343U CN 209373343 U CN209373343 U CN 209373343U CN 201920252783 U CN201920252783 U CN 201920252783U CN 209373343 U CN209373343 U CN 209373343U
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Abstract
The utility model provides a kind of optical projection system.Optical projection system includes fluorescent wheel, motor, light source module, processing and control module and power module.Motor is to rotate fluorescent wheel.Light source module is to provide excitation beam.Power module is to provide electric motors electric current and provide light source module driving current.When optical projection system is activated, power module provides the driving current with the first current value, and provides motor current and gradually promote the current value of motor current, so that motor rotates fluorescent wheel and gradually promotes the revolving speed of motor.Processing and control module receives the tach signal of motor, and when the revolving speed of motor reaches preset rotation speed, processing and control module controls power module and the current value of driving current is promoted to the second current value by the first current value.In the case where that can prevent fluorescent wheel excitation beam provided by light source from burning or aging, available machine time of optical projection system is effectively shortened.
Description
Technical field
The utility model is about a kind of optical projection system.
Background technique
The revolving speed of fluorescent wheel is insufficient in order to prevent, and fluorescent wheel excitation beam provided by light source is caused to burn or always
Change, after existing optical projection system can wait the revolving speed to rated speed of fluorescent wheel after being activated, can just do starting light source.Generally
For, the revolving speed of the fluorescent wheel of optical projection system is 2~3 seconds by zero to rated speed the time it takes.Therefore along with projection
The initialization time (including light source driven initialization time) of other modules of system is being activated from optical projection system to making
User can see that the available machine time spent by projected picture about needs 5 seconds altogether.Therefore, how further to shorten optical projection system
Available machine time is one of the project for optimizing optical projection system.
Utility model content
The utility model provides a kind of the utility model and relates to a kind of optical projection system, fluorescent wheel can prevented by light source
Provided excitation beam burn or aging in the case where, effectively shorten available machine time of optical projection system, make optical projection system can be with
Quickly providing human eye may be viewed by picture.
The optical projection system of the utility model includes fluorescent wheel, motor, light source module, processing and control module and power supply mould
Block.Motor is to rotate fluorescent wheel.Light source module is to provide excitation beam.Processing and control module is coupled to power module, horse
It reaches and light source module.Power module is coupled to motor and light source module, to provide electric motors electric current and provide light source
Module drive electric current.When optical projection system is activated, power module provides the driving current with the first current value, and provides
Motor current simultaneously gradually promotes motor current, so that motor rotation fluorescent wheel and the gradually revolving speed of promotion motor.Processing control mould
Block receives the revolving speed of motor, and when the revolving speed of motor reaches preset rotation speed, processing and control module, which controls power module, will drive electricity
Stream is promoted to the second current value by the first current value.
Based on above-mentioned, the utility model is to provide that there is the driving current of the first current value to drive when optical projection system is activated
The light source module of dynamic optical projection system, and the motor current that is gradually promoted is provided to drive the motor of optical projection system, so that motor turns
Dynamic fluorescent wheel and the revolving speed for gradually promoting motor.Next, when the revolving speed of motor reaches preset rotation speed, by driving current by
One current value is promoted to the second current value to drive light source module.In this way, the available machine time of optical projection system can effectively by
Shorten, and can also prevent fluorescent wheel excitation beam provided by light source from destroying.
In order to make the above-mentioned features and advantages of the utility model more obvious and understandable, special embodiment below, and appended by cooperation
Figure is described in detail below.
Detailed description of the invention
Fig. 1 is the schematic diagram of optical projection system depicted in the first embodiment according to the utility model.
Fig. 2 is the operational flowchart according to driving method depicted in an embodiment of the present invention.
Fig. 3 is the operational flowchart according to driving method depicted in another embodiment of the utility model.
Fig. 4 A to Fig. 4 D is the revolving speed and driving current according to motor depicted in an embodiment of the present invention respectively
Waveform diagram.
Fig. 5 is the schematic diagram of optical projection system depicted in the second embodiment according to the utility model.
Reference signs list
100,500: optical projection system
110,510: fluorescent wheel
120,520: motor
130,530: light source module
140,540: processing and control module
150,550: power module
560: luminance sensor
ELB: excitation beam
I1: the first current value
I2: the second current value
IL: driving current
IR: motor current
Ra: preset rotation speed
Rd: rated speed
RS: revolving speed
SL: brightness measuring value
S210, S220, S230: step
S310, S320, S330, S340, S350, S360: step
T: time
T0, t1, t2: time point.
Specific embodiment
In relation to addressing other technologies content, feature and effect before the utility model, in following cooperation with reference to one of attached drawing
In the detailed description of preferred embodiment, can clearly it present.
Referring to FIG. 1, Fig. 1 is the schematic diagram of optical projection system depicted in the first embodiment according to the utility model.?
In the present embodiment, optical projection system 100 includes fluorescent wheel 110, motor 120, light source module 130, processing and control module 140 and electricity
Source module 150.Motor 120 is to rotate fluorescent wheel 110.That is, motor 120 can drive fluorescent wheel 110 to rotate, make fluorescence
Wheel 110 reaches revolving speed RS.Light source module 130 is to provide excitation beam ELB.In the present embodiment, light source module 130 can be by
At least one laser diode (laser diode, LD) Lai Shixian, but the utility model is not limited, and light source module 130 can
To be realized by light-emitting components such as at least one light-emitting diodes (Light-emitting diode, LED).Processing and control module
140 are coupled to power module 150, motor 120 and light source module 130.Power module 150 is coupled to motor 120 and light source
Module 130.Power module 150 provides driving current IL to light source die to provide motor current IR to motor 120
Block 130.The quantity of the light source module of the utility model can be one or more, and be not limited to this embodiment.
In the present embodiment, when optical projection system 100 is activated (that is, booting), power module 150 can will have the first electricity
The driving current IL of flow valuve is provided to light source module 130.First current value is that the offer human eye of optical projection system 100 may be viewed by picture
When, drive minimum current value required for light source module 130.In addition, when with the driving offer of light source module 130 of the first current value
When excitation beam ELB, do not make fluorescent wheel 110 be excited light beam ELB irradiation and burn or damage.Light source module 130 has the
Under the driving of the driving current IL of one current value, optical projection system 100 is made to can provide the picture for the minimum brightness that human eye can watch.
That is, optical projection system 100, in the time point being activated, excitation beam ELB caused by light source module 130 passes through fluorescent wheel
110 can provide the picture for the minimum brightness that human eye when being activated can watch, picture when being e.g. switched on.In addition, being in projection
When system 100 is activated, motor current IR can also be provided motor 120 by power module 150, and start gradually to promote motor electricity
IR is flowed, using makes motor 120 rotate fluorescent wheel 110 and gradually promote the revolving speed RS of motor 120.That is, power module 150
The motor current IR with the current value gradually promoted can be provided with drive motor 120.The current value of motor current IR is at any time
It is promoted, and the promotion rate of the revolving speed RS of the corresponding motor 120 of promotion rate of the current value of motor current IR.That is,
The current value of motor current IR is bigger, then the revolving speed RS of motor 120 is higher, and the revolving speed of fluorescent wheel 110 is also faster.In this reality
It applies in example, the promotion rate of the revolving speed RS of motor 120 can be fixed, and may not be fixed.The utility model is not
It is limited with the hoisting way of the revolving speed of motor.
In the present embodiment, processing and control module 140 receives the revolving speed RS of motor 120.In the present embodiment, processing control
Module 140 can receive tach signal provided by motor 120, and the motor shown in tach signal meaning is received from tach signal
120 revolving speed RS.In some embodiments, processing and control module 140 can receive motor 120 by the revolving speed of fluorescent wheel 110
Revolving speed RS.That is, the method for the revolving speed RS of any measurement motor, does not all depart from the scope of the utility model.
When the revolving speed RS of motor 120 reaches preset rotation speed (e.g. 30Hz), processing and control module 140 can control power supply
Driving current IL is promoted to the second current value (e.g. 500mA) by the first current value (e.g. 100mA) by module 150.?
In the present embodiment, when optical projection system 100 is activated, power module 150 can provide the driving of the first current value (e.g. 100mA)
Electric current IL drives the light source module 130 of optical projection system 100, and provides the motor current IR gradually promoted to drive optical projection system
100 motor 120, so that motor 120 rotates fluorescent wheel 110 and gradually promotes the revolving speed RS of motor 120.In the present embodiment,
Power module 150 can be the current value gradually to promote motor current IR in a linear fashion.The preset rotation speed of motor 120 can
It is adjusted according to actual demand.When the revolving speed RS of motor 120 reaches preset rotation speed (e.g. 30Hz), processing and control module
140 can control power module 150 to start to promote driving current IL.At this time point, the current value of driving current IL is from first
Current value (e.g. 100mA) starts to be promoted, until being promoted until the second current value (e.g. 500mA).The present embodiment
Second current value, which can be, drives 130 institute of light source module according to nominal brightness or maximum brightness corresponding to optical projection system 100
The current value needed, that is, the light source module 130 is driven with the second current value, optical projection system 100 can be made to be projected out nominal brightness
Or the picture of maximum brightness.Therefore, when the revolving speed RS of motor 120 is promoted to rated speed (e.g. 120Hz), power module
150 provide the driving current IL of the second current value (e.g. 500mA).Rated speed is that motor 120 makes turning for fluorescent wheel 110
Speed reaches revolving speed required for the revolving speed or maximum (top) speed of normal operating.In the present embodiment, processing and control module 140 can be such as
It is central processing unit (Central Processing Unit, CPU) or the general service or special of other programmeds
The microprocessor (Microprocessor) of purposes, Digital System Processor (Digital Signal Processor, DSP),
Programmed controller, Application Specific Integrated Circuit (Application Specific Integrated Circuits,
ASIC), programmable logic devices (Programmable Logic Device, PLD) or other similar device or processing software
Or control software, but the utility model is not only restricted to above-mentioned hardware or software.
Herein it is noted that when the revolving speed RS of motor 120 reaches rated speed, turning for fluorescent wheel 110 can be made
Speed is enough fastly to cause the light beam ELB that will not be excited of fluorescent wheel 110 to destroy.The utility model be activated in optical projection system 100 (that is,
Booting) when, light source module 130 is just driven with the driving current IL of the first current value, it is considerable that optical projection system 100 can provide human eye
It sees picture, in this way, which the available machine time of optical projection system 100 can effectively be shortened, and also fluorescent wheel 110 can be prevented by light
Excitation beam ELB provided by source module 130 is destroyed.
The driving method of optical projection system will be illustrated next.It please also refer to Fig. 1 and Fig. 2, Fig. 2 is according to the utility model
The operational flowchart of driving method depicted in one embodiment.Optical projection system 100 is activated in step S210.In the present embodiment
In, optical projection system 100 is started the operating process of the present embodiment by being switched on.In step S220, optical projection system 100 is activated
When, optical projection system 100 can provide the driving current IL with the first current value by power module, and provide motor current IR
And motor current IR gradually is promoted so that motor rotation fluorescent wheel 110 and gradually the revolving speed RS of promotion motor 120.In step
In S220, light source module 130 makes optical projection system 100 can provide people under the driving of the driving current IL with the first current value
The picture for the minimum brightness that eye can watch.That is, optical projection system 100, in the time point being activated, light source module 130 is produced
Raw excitation beam ELB can produce the picture of minimum brightness when being activated by fluorescent wheel 110, picture when being e.g. switched on.
In addition to this, the revolving speed RS of motor 120 also can be gradually elevated.Next, being entered step when motor generates revolving speed RS
S230。
In step S230, optical projection system 100 can be through the revolving speed RS for the motor 120 that processing and control module 140 receives
Judged, when the revolving speed RS of motor 120 reaches preset rotation speed, processing and control module 140 can control power module 150 and will drive
The current value of streaming current IL is promoted to the second current value by the first current value to drive light source module 130.
It further illustrates, please also refer to Fig. 1 and Fig. 3, Fig. 3 is according to depicted in another embodiment of the utility model
Driving method operational flowchart.In the present embodiment, optical projection system 100 is activated in step s310, and in step
The driving current IL for having the first current value (e.g. 100mA) is provided in S320 by power module 150, and motor is provided
Electric current IR simultaneously gradually promotes motor current IR so that motor 120 rotates fluorescent wheel 110 and gradually promotes the revolving speed of motor 120
RS.Step S310, the implementation detail of S320 can obtain enough teachings in the embodiment of Fig. 1 and Fig. 2, not weigh herein
It states.Step S330~the S360 of the present embodiment can be mapped to the step S230 of Fig. 2.In the present embodiment, in step S330, projection
System 100 can receive the revolving speed RS of motor 120 by processing and control module 140.Processing and control module 140 judges motor 120
Revolving speed RS whether be greater than preset rotation speed (e.g. 30Hz).When processing and control module 140 judges that the revolving speed RS of motor 120 is small
When preset rotation speed, returns to step S320 and continue to promote motor current IR.On the other hand, work as processing and control module
140 judge motor 120 revolving speed RS be greater than preset rotation speed when, enter step S340.
In step S340, processing and control module 140 can control power module 150, and using, which promotes power module 150, drives
The current value of streaming current IL and the current value for promoting motor current IR.That is, the current value of driving current IL can be from
One current value (e.g. 100mA) starts to be elevated, and motor current IR is also persistently elevated.
Processing and control module 140 receives the revolving speed RS of motor 120 in step S350.Processing and control module 140 judges
Whether the revolving speed RS of motor 120 reaches rated speed (e.g. 120Hz).When processing and control module 140 judges motor 120
When revolving speed RS is less than rated speed, step S340 is returned to.On the other hand, when processing and control module 140 judges motor 120
When revolving speed RS is equal to rated speed, then S360 is entered step.It is exactly when the revolving speed RS of motor 120 is equal to volume in step S360
When determining revolving speed, processing and control module 140 can control power module 150, and power module 150 is made to provide the drive with the second current value
Streaming current IL uses driving light source module 130.
It is specifically bright, it please also refer to Fig. 1, Fig. 3 and Fig. 4 A, Fig. 4 A is drawn according to an embodiment of the present invention
The revolving speed of the motor shown and the waveform diagram of driving current.In the present embodiment, in time point t0, that is, in step s310,
Optical projection system 100 is activated, and the driving with the first current value I1 (e.g. 100mA) is provided by power module 150
Electric current IL, and motor current IR is provided and gradually promotes motor current IR so that motor rotates fluorescent wheel and gradually promotes horse
Up to 120 revolving speed RS (that is, step S320).Optical projection system 100 can receive the revolving speed of motor 120 by processing and control module 140
(that is, step S330).Whether the revolving speed RS that processing and control module 140 judges motor 120 is greater than preset rotation speed Ra (e.g.
30Hz).When processing and control module 140 is when time point t1 judges the revolving speed RS of motor 120 greater than preset rotation speed Ra, processing is controlled
Molding block 140 can control power module 150 in time point t1, and using makes power module 150 start to promote driving in time point t1
The current value of electric current IL and persistently promotion motor current IR (that is, step S340).In the present embodiment, the electricity of driving current IL
Flow valuve is to be elevated in a linear fashion from the first current value I1, and preset rotation speed Ra is less than the rated speed Rd of motor.
Processing and control module 140 also persistently receives the revolving speed RS (that is, step S350) of motor 120, and judges motor 120
Whether revolving speed RS reaches rated speed Rd (e.g. 120Hz).When processing and control module 140 judges motor in time point t2
When 120 revolving speed RS is equal to rated speed Rd, processing and control module 140 can control power module 150 in time point t2, make power supply
Module 150 provides the driving current IL with the second current value I2, uses driving light source module 130 (that is, step S360).
It refer again to Fig. 4 B, Fig. 4 B is the revolving speed and driving electricity according to motor depicted in another embodiment of the utility model
The waveform diagram of stream.Unlike Fig. 4 A, during time point t1 to the t2 of the present embodiment, the current value of driving current IL is
It is elevated in a non-linear manner from the first current value, and the rate that the current value of driving current IL is elevated is increase with time
And increase.
Refer again to Fig. 4 C, Fig. 4 C be according to motor 120 depicted in another embodiment of the utility model revolving speed RS with
The waveform diagram of driving current.Unlike Fig. 4 A, during time point t1 to the t2 of the present embodiment, the electricity of driving current IL
Flow valuve be elevated in a non-linear manner from the first current value, and the rate that is elevated of driving current IL be increase with time and
It reduces.
Refer again to Fig. 4 D, Fig. 4 D be according to motor 120 depicted in the utility model another embodiment revolving speed RS with
The waveform diagram of driving current IL.Unlike Fig. 4 A, during time point t1 to the t2 of the present embodiment, driving current IL's
Current value is elevated in a manner of stepping (step) from the first current value.
Referring to FIG. 5, Fig. 5 is the schematic diagram of optical projection system depicted in the second embodiment according to the utility model.This
For embodiment unlike Fig. 1, optical projection system 500 includes fluorescent wheel 510, motor 520, light source module 530, processing and control module
540 and power module 550 other than, optical projection system 500 further includes luminance sensor 560.In the present embodiment, luminance sensor
560 are coupled to power module 550.Luminance sensor 560 obtains a brightness measuring value SL to measure the brightness of environment, and
There is provided the brightness measuring value SL for being relevant to the brightness of environment to power module 550.Power module 550 can be according to brightness measuring value
SL adjusts the first current value.That is, power module 550 can be according to association current environment when optical projection system 500 is activated
Brightness measuring value SL adjustment driving current IL the first current value.For example, when indoor brightness is darker, power module
550 can reduce the first current value.Again for example, when indoor brightness is brighter, power module 550 can promote the first electric current
Value.In this way, which optical projection system 500 can be according to the minimum brightness that the brightness adjustment human eye of environment can watch when being activated
Picture when booting.The fluorescent wheel 510, motor 520, light source module 530, processing and control module 540 and power supply mould of the present embodiment
The implementation detail of block 550 can obtain enough teachings in multiple embodiments in Fig. 1 to Fig. 4 D, therefore not repeat herein.
In some embodiments, luminance sensor 560 is coupled to processing and control module 540.Processing and control module 540 can be according to
The first current value of driving current IL is adjusted according to the brightness measuring value SL control power module 550 of association current environment.
In some embodiments, optical projection system 500 has the upper limit value of the first current value of limitation, and using ensures in projection system
Fluorescent wheel 510 will not the excitation beam caused by the driving current IL with the first excessively high current value when system 500 is activated
ELB is destroyed.
In conclusion the utility model is to provide that there is the driving current of the first current value to drive when optical projection system is activated
The light source module of dynamic optical projection system, and the motor current that is gradually promoted is provided to drive the motor of optical projection system, so that motor turns
Dynamic fluorescent wheel and the revolving speed for gradually promoting motor.Next, when the revolving speed of motor reaches preset rotation speed, by driving current by
One current value is promoted to the second current value to drive light source module.In this way, the available machine time of optical projection system can effectively by
Shorten, and can also prevent fluorescent wheel excitation beam provided by light source from destroying.In addition to this, the projection system of the utility model
System can also be according to the first current value of brightness adjustment of environment.In this way, which optical projection system can be according to environment when being activated
The picture when booting for the minimum brightness that brightness adjustment human eye can watch.
Although the utility model is disclosed above with embodiment, it is not intended to limit the utility model, Ren Heben
Field technical staff can make some changes and embellishment without departing from the spirit and scope of the utility model, therefore this is practical new
Subject to the protection scope of type ought be defined depending on appended claims.
Claims (6)
1. a kind of optical projection system, which is characterized in that the optical projection system includes fluorescent wheel, motor, light source module, processing control mould
Block and power module:
The motor is to rotate the fluorescent wheel；
The light source module is to provide excitation beam；
The processing and control module is coupled to the power module, the motor and the light source module；And
The power module is coupled to the motor and the light source module, to provide the electric motors electric current and offer
The light source module driving current, wherein
When the optical projection system is activated, the power module provides the driving current with the first current value, and
The motor current is provided and gradually promotes the motor current, so that the motor rotates the fluorescent wheel and gradually promotes institute
The revolving speed of motor is stated,
The processing and control module receives the revolving speed of the motor, when the revolving speed of the motor reaches preset rotation speed, the place
Reason control module controls the power module and the driving current is promoted to the second current value by first current value.
2. optical projection system as described in claim 1, which is characterized in that first current value is that the optical projection system provides people
When eye may be viewed by picture, minimum current value required for the light source module is driven.
3. optical projection system as described in claim 1, which is characterized in that second current value corresponds to the optical projection system
According to current value required for nominal brightness or maximum brightness.
4. optical projection system as described in claim 1, which is characterized in that when the revolving speed of the motor reaches preset rotation speed, institute
The current value for stating motor current is promoted at any time, and the corresponding motor of promotion rate of the current value of the motor current
The promotion rate of revolving speed.
5. optical projection system as described in claim 1, which is characterized in that the preset rotation speed is less than specified turn of the motor
Speed.
6. optical projection system as described in claim 1, the optical projection system further includes luminance sensor, it is characterised in that:
The luminance sensor provides brightness measuring value to measure the brightness of environment, and the brightness measuring value is provided
To the power module,
The power module is also to adjust first current value according to the brightness measuring value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920252783.0U CN209373343U (en) | 2019-02-28 | 2019-02-28 | Optical projection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920252783.0U CN209373343U (en) | 2019-02-28 | 2019-02-28 | Optical projection system |
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| CN209373343U true CN209373343U (en) | 2019-09-10 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111025832A (en) * | 2019-12-19 | 2020-04-17 | 青岛海信激光显示股份有限公司 | Laser projection equipment and starting method and shutdown method thereof |
| CN111312126A (en) * | 2019-12-19 | 2020-06-19 | 青岛海信激光显示股份有限公司 | Laser projection device |
| CN111312125A (en) * | 2019-12-19 | 2020-06-19 | 青岛海信激光显示股份有限公司 | Laser projection equipment and starting method and shutdown method thereof |
| CN111624838A (en) * | 2019-02-28 | 2020-09-04 | 中强光电股份有限公司 | Projection system and driving method of projection system |
| WO2021121345A1 (en) * | 2019-12-19 | 2021-06-24 | 青岛海信激光显示股份有限公司 | Laser projection device and start method and shutdown method thereof |
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2019
- 2019-02-28 CN CN201920252783.0U patent/CN209373343U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111624838A (en) * | 2019-02-28 | 2020-09-04 | 中强光电股份有限公司 | Projection system and driving method of projection system |
| CN111025832A (en) * | 2019-12-19 | 2020-04-17 | 青岛海信激光显示股份有限公司 | Laser projection equipment and starting method and shutdown method thereof |
| CN111312126A (en) * | 2019-12-19 | 2020-06-19 | 青岛海信激光显示股份有限公司 | Laser projection device |
| CN111312125A (en) * | 2019-12-19 | 2020-06-19 | 青岛海信激光显示股份有限公司 | Laser projection equipment and starting method and shutdown method thereof |
| WO2021121345A1 (en) * | 2019-12-19 | 2021-06-24 | 青岛海信激光显示股份有限公司 | Laser projection device and start method and shutdown method thereof |
| US11669005B2 (en) | 2019-12-19 | 2023-06-06 | Hisense Laser Display Co., Ltd. | Laser projection apparatus and control method thereof |
| US11906890B2 (en) | 2019-12-19 | 2024-02-20 | Hisense Laser Display Co., Ltd | Laser projection apparatus |
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