CN209471330U - A kind of projection display system based on nonrotational wavelength conversion body - Google Patents
A kind of projection display system based on nonrotational wavelength conversion body Download PDFInfo
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- CN209471330U CN209471330U CN201822248132.2U CN201822248132U CN209471330U CN 209471330 U CN209471330 U CN 209471330U CN 201822248132 U CN201822248132 U CN 201822248132U CN 209471330 U CN209471330 U CN 209471330U
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Abstract
The utility model discloses a kind of projection display systems based on nonrotational wavelength conversion body, successively there is excitation module, wavelength conversion body, light combination unit, dodging device, photoelectric sensor, control unit, light valve and projection lens by optical path direction, excitation module is for emitting excitation beam；Wavelength conversion body has wavelength conversion material layer and wavelength conversion material support to constitute, and the light beam of new wavelength is generated under excitation beam effect；Light combination unit and dodging device, synthesis and dodging for multi-wavelength's light beam；Photoelectric sensor, detects the intensity variation of mixed light beam, and converts optical signals to electric signal；Control unit generates the opening/closing time of exciting light for timing control excitation light emission unit, receives the electric signal that photoelectric sensor detects, projection light source system is avoided to generate colour cast；Mixed light beam after even light is tuned as an image strip by light valve, by projection lens, is thrown to display screen, is watched for user.
Description
Technical field
The utility model relates to field of projection display more particularly to a kind of Projection Displays based on nonrotational wavelength conversion body
System.
Background technique
With the continuous development and maturation of shadow casting technique, Projection Display has been increasingly becoming people's education, commercial affairs exchange, family
Essential digital equipment is entertained, and laser projection, because it is with super brightness, wide colour gamut, the advantages such as high color purity are futures
Project the trend of development.
Laser projection uses pure laser light source, and not only cost is high, but also laser relevant by force can generate speckle effect, sternly
Ghost image rings the picture quality of projection.Cost is relatively low at present while can reduce the fluorescent wheel scheme of speckle effect again.Using sharp
It is luminous to excite the rotation colour wheel for being coated with fluorescent powder, generate three primary light source.Excitation light source is group after single laser diode light combination
At laser array.Fluorescence colour wheel include Round Wheel substrate, coated on substrate phosphor powder layer and drive substrate rotation
Motor.Due to smearing fluorescent powder on fluorescent wheel substrate, corresponding fluorescence could be generated.Once fluorescent wheel is smeared successfully, no
With fluorescent powder putting in order on fluorescent wheel, shared partition size has just been fixed, if the later period due to projected color deviation, needs
When adjusting color timing or partition size, it cannot achieve.
During the excitation phosphor powder layer that excitation light source issues generates fluorescence, motor drives colour wheel along center
Axis rotation, so that the hot spot that exciting light is formed acts on phosphor powder layer by circular path, to avoid occurring because of high power laser
The problem of fluorescent powder hot-quenching is gone out caused by irradiating for a long time.Fluorescent wheel needs high speed rotation, and being not only easy to produce vibration influences
The stability of system, and can attach dust in rotation causes system optics efficiency to reduce.It is this to use laser array handle
Numerous single laser diode elder generation light combinations, then the structure for exciting fluorescent wheel to generate three primary colours, due to by fluorescent material and fluorescent wheel
The influence of size excites the brightness of generation to be restricted.
Summary of the invention
To solve drawbacks described above of the existing technology, the purpose of this utility model is to provide one kind to be based on nonrotational wave
The projection display system of long conversion body holds when solving the high energy excitation beam excitation wavelength transition material new wavelength light beam of generation
The disadvantage of wavelength conversion body is easily burnt, meanwhile, the mechanical rotation of fluorescent wheel is become into timing control excitation light source and generates exciting light
Electronic switch.Total eliminates the fluorescent wheel of rotation, and it is unstable to solve dynamic balancing of the fluorescent wheel in high-speed rotation
Problem.Be able to achieve lighting source is fully sealed encapsulation, while efficiency greatly improves.
To achieve the above object, a kind of the technical solution adopted in the utility model: throwing based on nonrotational wavelength conversion body
Shadow display system is successively had excitation module, wavelength conversion body, light combination unit, dodging device, photoelectric sensing by optical path direction
Device, control unit, light valve and projection lens contain several excitation light emission units, each exciting light hair in excitation module
Penetrate unit exciting light type be visible light or black light or combinations thereof, the excitation beam that excitation module is launched, via
Wavelength conversion body generates the light beam of new wavelength, then, forms mixed light beam by light combination unit, and mixed light beam passes through even
Electro-optical device carries out dodging to light beam, and light valve is configured on the transmission path of mixed light beam, by the mixed light beam tune after even light
Become image strip, image strip is projected by the projection lens being configured on the transmission path of image strip to projection screen
On, so that user sees the projected image picture that multiple color is constituted；The photoelectric sensor is arranged after dodging device, uses
After detection mixed light beam passes through dodging device, the intensity variation of light beam, and convert optical signals to electric signal；The control
Unit generates the opening/closing time of exciting light for timing control excitation light emission unit, meanwhile, it receives photoelectric sensor and detects
The electric signal arrived, and the signal value of the electric signal is compared with preset signal reference value, control unit, which is adjusted, to swash
The Strength Changes of the exciting light light beam of excitation light emission unit in light emitting module make through the new wavelength after wavelength conversion body
Light beam, the color value by light combination unit and dodging device tend to preset value, the colour cast problem for avoiding projection light source system from generating.
The excitation light emission unit is infrared, ultraviolet, light-emitting diode (light emitting diode) or laser
Light source (laser source).
The wavelength conversion body is made of wavelength conversion material layer and wavelength conversion material supporter, wavelength conversion layer attachment
In on wavelength conversion material supporter, the setting of the wavelength conversion material layer and the arrangement mode pair of excitation light emission unit
Answer, coating of the wavelength conversion layer on wavelength conversion material supporter be round, rectangular, polygon, annular or other not
Regular shape.
The wavelength conversion body is reflective wavelength conversion body or transmission-type wavelength conversion body, corresponding wavelength converting body
Wavelength conversion material supporter be transmission-type supporter, or reflection-type supporter.
The excitation light emission unit is packaged in closed cavity with corresponding wavelength conversion body, forms laser light source
One mould group.
Excitation light emission unit in the excitation module uses the laser light source of black light, can modulate by light valve
Sightless structure light out, detection and identification for human action or opaque object.
The light combination unit prisms light combination passes through optical fiber light combination.
By adopting the above technical scheme the utility model has the advantages that Projection Display system of the utility model based on nonrotational wavelength conversion body
The laser light source of system solves high energy excitation beam excitation wave using the structure of the nonrotational wavelength conversion body of light combination after first exciting
When long transition material generates new wavelength light beam, it is easy to burn the disadvantage of wavelength conversion body, meanwhile, the mechanical rotation of fluorescent wheel is become
The electronic switch of exciting light is generated for timing control excitation light source.Total eliminates the fluorescent wheel of rotation, solves fluorescence
Take turns the dynamic balancing instability problem in high-speed rotation.Be able to achieve lighting source is fully sealed encapsulation, while efficiency mentions significantly
It is high.
Detailed description of the invention
Fig. 1 is that the lighting source based on nonrotational wavelength conversion body of the utility model is applied to optical projection system；
Fig. 2 is the enlarged diagram of the wavelength conversion body 20 in Fig. 1 of the utility model；
Fig. 3 is the projection display system that blue laser excitation red-green wavelengths conversion body generates red-green-blue.
Specific embodiment
Fig. 1 is a kind of operation principle schematic diagram of projection display system based on nonrotational wavelength conversion body of the invention,
Comprising excitation module 10, wavelength conversion body 20, light combination unit 30, dodging device 40, photoelectric sensor 50, control unit 60,
Light valve 70 and projection lens 80.
Contain several excitation light emission units in excitation module 10, the exciting light type of each excitation light emission unit can
It can also be different with identical, can be the combination that visible light is also possible to black light or various light sources.Excitation module 10 is sent out
The excitation beam 10a of injection generates the light beam 20a of new wavelength via wavelength conversion body 20, then, by light combination unit 30
And mixed light beam 30a is formed, mixed light beam 30a carries out dodging by dodging device 40, to light beam, and light valve 70 is matched
It is placed on the transmission path of 40 a of mixed light beam, the mixed light beam 40a after even light is tuned as an image strip 70a.Image
Projection lens on transmission path of the light beam 70a by being configured at image strip 70a is after 80s, in projection to display screen, so that
User sees the projected image picture that multiple color is constituted.
Photoelectric sensor 50 is set after dodging device 40, for detecting mixed light beam 30a by after dodging device, light beam
The intensity variation of 40a, and convert optical signals to electric signal.Control unit 60 receives photoelectric sensor 50 and detects obtained electricity
Signal, and the signal value of the electric signal is compared with preset signal reference value, when the signal value of the electric signal is inclined
When from signal reference value, control unit 60 passes through the excitation light of the excitation light emission unit in software adjustment excitation module 10
The Strength Changes of beam decrease or increase excitation especially by the operating voltage or electric current for increasing or reducing excitation light emission unit
Thus the number of light emitting unit brings the change of the optical power of different excitation light emission units in excitation module.Make to pass through
The light beam of new wavelength after wavelength conversion body, the color value by light combination unit and dodging device tend to preset value.It avoids projecting
The colour cast problem that light-source system generates.It was found that passing through control unit 60, the excitation of timing control excitation light emission unit when deviation
The Strength Changes of light light beam carry out dynamic in real time and adjust.
The excitation module 10 is made of to emit light beam 10a several excitation light emission units, the first excitation
Light emitting unit 101, the second excitation light emission unit 102 ..., n-th excitation light emission unit 10n etc..Each excitation light emission
The exciting light type of unit can be the same or different, and can be infrared, ultraviolet, light-emitting diode (light emitting
Diode) or laser light source (laser source), but not limited to this.The group number of excitation light emission unit has several groups of excitations
Light emitting unit by the type of the exciting light sources used, and requires the light color type that goes out of light source to determine, meanwhile, it to combine
The type of wavelength conversion material and the placement position of wavelength conversion material supporter.
The wavelength conversion body 20, is made of, wave wavelength conversion material layer 201 and wavelength conversion material supporter 202
Long conversion layer 201 is attached on wavelength conversion material supporter 202.The effect of wavelength conversion body, exactly in excitation beam 10a
Under excitation, the light beam 20a of new wavelength is generated.Specifically, wavelength conversion body 20 is configured at the transmission path of excitation beam 10a
On, to the excitation beam 10a for issuing excitation module 10, change its optical wavelength via wavelength conversion body 20, is formed new
Wavelength light beam 20a.Referring to fig. 2, as needed, wavelength conversion layer has first wave length transformational substance 201a, and second wave length turns
Substance 201b is changed, third Wavelength conversion substance 201c specifically needs that several wavelength conversion layers are arranged, needs to cooperate excitation module
Exciting light light beam wavelength type, and need to be converted into the wavelength type of new wavelength light beam to set.
The wavelength conversion body 20 is divided into reflective wavelength conversion body and transmission-type wave according to the difference that optical path needs
Long conversion body is mainly characterized in that the wavelength conversion material supporter of wavelength converting body 20 is transmission-type supporter or reflection-type
Supporter.
The distribution of wavelength conversion material layer is not limited to a kind of color, is also not necessarily limited to certain arrangement mode, specific to arrange
Mode is related with the type of excitation light emission unit and arrangement mode.The coating of wavelength conversion layer can be circle in wavelength conversion body
Shape, rectangular, polygon, irregular shape, with excitation light emission unit matching, and be conducive to heat dissipation be advisable.Specific example is shown in figure
2.A kind of merely exemplary arrangement mode for illustrating wavelength conversion material layer on wavelength convert supporter of the embodiment of the present invention.
Example:
Fig. 3 system is painted according to the embodiment of the present invention, and a kind of blue excitation light excites red-green wavelengths conversion body, generate it is red, green,
The schematic diagram figure of blue three color light.Excitation light emission unit is just divided into three groups, as shown in Figure 3.First laser transmitting unit 101, the
Two excitation light emission units 102, third excitation light emission unit 103.It is blue laser diode array, wherein red wave
Long transition material layer 202 is configured on the transmission path of the excitation beam 102a of the second excitation-emission unit, and green wavelength turns
Conversion materials layer 203 is configured on the transmission path of the excitation beam 103a of third excitation light emission unit；Characteristic area 201 is non-
Wavelength-converting region, can be transparent, or be used to be scattered to realize more preferably incident blue light including scattering material
Uniformity.Wavelength convert does not occur when blue excitation light is incident in characteristic area 201, emergent light is still blue light.When blue swashs
It shines when being incident in characteristic area 202a, then green wavelength transition material is excited to emit green light.When blue excitation light is incident in feature
When area 203a, then red wavelength transition material is excited to emit feux rouges.Light combination unit 30, for will by the blue light of characteristic area 201,
By the green light that characteristic area 202a is issued, by the blue light that characteristic area 203a is issued, light combination is to form new mixed light beam.Mixing
Light beam 30a carries out dodging by dodging device 40, to light beam, and light valve 70 is configured at the transmitting of 40 a of mixed light beam
On path, the mixed light beam 40a after even light is tuned as an image strip 70a.Image strip 70a is by being configured at image light
Projection lens on the transmission path of beam 70a is after 80s, in projection to projection screen, so that user sees the throwing that multiple color is constituted
Shadow image frame.
The light emitting device of the present embodiment further includes control device 60, which excites light unit with first on the line
101, the second excitation light unit, third excitation light unit are connected to realize control, control the opening and closing of different transmitting units,
And the workload (such as operating current or operating voltage) when control unlatching, so that solid luminous device is emitted indigo plant respectively
Light, green light and feux rouges.
In addition, in the present embodiment, it can also be configured on the light transmission path between light emitting module 10 and light valve 50
His optical element.For example, these optical elements are lens and reflecting mirror or other optical elements, as transmitting light beam 10a
Or mixed light beam 30a is used, but not limited to this.Meanwhile in projection lens 80 similarly other settable optical elements in
Interior, but not limited to this.
Claims (7)
1. a kind of projection display system based on nonrotational wavelength conversion body, is successively had excitation module, wave by optical path direction
Long conversion body, light combination unit, dodging device, photoelectric sensor, control unit, light valve and projection lens, it is characterised in that: institute
State in excitation module containing several excitation light emission units, the exciting light type of each excitation light emission unit be visible light or
Black light or combinations thereof, the wavelength conversion body are made of wavelength conversion material layer and wavelength conversion material supporter, wavelength
Conversion layer is attached on wavelength conversion material supporter, the setting of the wavelength conversion material layer and the row of excitation light emission unit
Mode for cloth is corresponding；The excitation beam that excitation module is launched generates the light beam of new wavelength via wavelength conversion body, then,
Mixed light beam is formed by light combination unit, mixed light beam carries out dodging by dodging device, to light beam, and light valve is configured at
On the transmission path of mixed light beam, the mixed light beam after even light is tuned as image strip, image strip is by being configured at image
Projection lens on the transmission path of light beam is projected to projection screen, so that user sees the perspective view that multiple color is constituted
As picture；The photoelectric sensor is arranged after dodging device, for detecting mixed light beam by after dodging device, light beam
Intensity variation, and convert optical signals to electric signal；Described control unit is generated for timing control excitation light emission unit
The opening/closing time of exciting light, meanwhile, the electric signal that photoelectric sensor detects is received, and by the signal value of the electric signal and in advance
The signal reference value first set is compared, and control unit adjusts the excitation light of the excitation light emission unit in excitation module
The Strength Changes of beam make the light beam by the new wavelength after wavelength conversion body, by the color value of light combination unit and dodging device
Tend to preset value, the colour cast problem for avoiding projection light source system from generating.
2. the projection display system according to claim 1 based on nonrotational wavelength conversion body, it is characterised in that: described to swash
Luminescence emissions unit is infrared, ultraviolet, light-emitting diode (light emitting diode) or laser light source (laser
Source).
3. the projection display system according to claim 1 based on nonrotational wavelength conversion body, it is characterised in that: the wave
Coating of the long conversion layer on wavelength conversion material supporter is round, rectangular, polygon, annular.
4. the projection display system according to claim 1 based on nonrotational wavelength conversion body, it is characterised in that: described
Wavelength conversion body is reflective wavelength conversion body or transmission-type wavelength conversion body, the wavelength conversion material of corresponding wavelength converting body
Supporter is transmission-type supporter, or reflection-type supporter.
5. the projection display system according to claim 1 based on nonrotational wavelength conversion body, it is characterised in that: described to swash
Luminescence emissions unit is packaged in closed cavity with corresponding wavelength conversion body, forms a mould group of laser light source.
6. the projection display system according to claim 1 based on nonrotational wavelength conversion body, it is characterised in that: described to swash
Excitation light emission unit in light emitting module uses the laser light source of black light, can modulate sightless knot by light valve
Structure light, detection and identification for human action or opaque object.
7. the projection display system according to claim 1 based on nonrotational wavelength conversion body, it is characterised in that: described
Light combination unit prisms light combination passes through optical fiber light combination.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822248132.2U CN209471330U (en) | 2018-12-29 | 2018-12-29 | A kind of projection display system based on nonrotational wavelength conversion body |
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| CN201822248132.2U CN209471330U (en) | 2018-12-29 | 2018-12-29 | A kind of projection display system based on nonrotational wavelength conversion body |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112067256A (en) * | 2020-09-04 | 2020-12-11 | 河南中光学集团有限公司 | Light path detection device and detection method for light combination system of laser projector |
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2018
- 2018-12-29 CN CN201822248132.2U patent/CN209471330U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112067256A (en) * | 2020-09-04 | 2020-12-11 | 河南中光学集团有限公司 | Light path detection device and detection method for light combination system of laser projector |
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