CN207571403U - Disappear speckle device, laser light source and laser projection system - Google Patents
Disappear speckle device, laser light source and laser projection system Download PDFInfo
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- CN207571403U CN207571403U CN201721664634.2U CN201721664634U CN207571403U CN 207571403 U CN207571403 U CN 207571403U CN 201721664634 U CN201721664634 U CN 201721664634U CN 207571403 U CN207571403 U CN 207571403U
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Abstract
The utility model discloses one kind and disappears speckle device, laser light source and laser projection system, the speckle device that disappears includes controller and the liquid crystal display panel in laser beam exits light path, controller applies the deflection voltage that voltage value is different and voltage value changes over time to the different location of liquid crystal display panel respectively, so that the deflection direction difference of the liquid crystal of the different location and deflection direction of the liquid crystal of each position changes over time in liquid crystal display panel.The utility model can eliminate laser speckle phenomenon.
Description
Technical field
The utility model is related to laser technology fields.Disappear speckle device, laser light source and laser more particularly, to one kind
Optical projection system.
Background technology
During light source of the laser light source as optical projection system, since the high coherence of laser can cause laser beam itself to generate light
Spot interference (from relevant), laser beam, which is produced from relevant condition, is：Laser frequency is identical, direction of vibration is consistent and phase difference is permanent
It is fixed.Hot spot interference can cause to form the veiling glare of brightness irregularities, referred to as laser speckle, laser speckle beside laser emitting hot spot
Phenomenon can influence the imaging effect of projection.The more coarse laser speckle phenomenon in surface that laser projection arrives is more apparent.
Accordingly, it is desirable to provide a kind of direction of vibration difference by making laser in laser beam eliminates disappearing for laser speckle phenomenon
Speckle device, laser light source and laser projection system.
Utility model content
Disappear speckle device, laser light source and laser projection system the purpose of this utility model is to provide one kind, to pass through
The direction of vibration for making laser in laser beam is different, is dissipated in other words by the way that the phase relation difference of laser in laser beam is made to eliminate laser
Spot phenomenon.
In order to achieve the above objectives, the utility model uses following technical proposals：
The utility model discloses one kind and disappears speckle device, the liquid crystal surface including controller and in laser beam exits light path
Plate, the deflection electricity that the controller applies voltage value difference respectively to the different location of liquid crystal display panel and voltage value changes over time
Pressure so that the deflection direction of the liquid crystal of different location is different in liquid crystal display panel and the deflection direction of the liquid crystal of each position at any time
Variation.
Preferably, the liquid crystal display panel includes first substrate, second substrate, between first substrate and second substrate
Liquid crystal, the first substrate are equipped with the different first electrode in multiple positions, and the second substrate is equipped with multiple with first electrode phase
To second electrode, the controller applies deflection voltage respectively to the first electrode of different location and opposite second electrode.
Preferably, the controller applies the deflection that voltage value is sine wave respectively to the different location of liquid crystal display panel
Voltage.
Preferably, the controller alternately applies the first voltage value and second voltage respectively to the different location of liquid crystal display panel
The deflection voltage of value.
Preferably, the first voltage value or second voltage value are 0V.
Preferably, the controller applies the deflection voltage of the first voltage value to the different location of liquid crystal display panel and applies respectively
The duration for adding the deflection voltage of second voltage value is 0.5-1ms.
A kind of laser light source is also disclosed in the utility model, the laser including shoot laser, further includes above-mentioned dissipation spot dress
It puts.
A kind of laser projection system is also disclosed in the utility model, including above-mentioned laser light source.
The beneficial effects of the utility model are as follows：
Technical solution described in the utility model is different by making the direction of vibration of laser in laser beam, in other words by making to swash
The position of laser is mutually different in light beam eliminates laser speckle phenomenons, and technical solution described in the utility model it is small, it is simple in structure,
Reliability is high, energy consumption is relatively low.
Description of the drawings
Specific embodiment of the present utility model is described in further detail below in conjunction with the accompanying drawings；
Fig. 1 shows to disappear the schematic diagram of speckle device.
Fig. 2 shows the schematic diagrames of laser light source.
Specific embodiment
In order to illustrate more clearly of the utility model, the utility model is done into one with reference to preferred embodiments and drawings
The explanation of step.Similar component is indicated with identical reference numeral in attached drawing.It will be appreciated by those skilled in the art that below
Specifically described content is illustrative and be not restrictive, and should not limit the scope of protection of the utility model with this.
As shown in Figure 1, the speckle device provided in this embodiment that disappears, including controller 10 and in laser beam exits light path
Liquid crystal display panel 20, controller 10 applies to the different location of liquid crystal display panel 20 that voltage value is different and voltage in different moments respectively
The deflection voltage that value changes over time, so that the liquid crystal 201 of different location (can be understood as liquid crystal point in liquid crystal display panel 20
Son) deflection direction difference and the deflection direction of the liquid crystal 201 of each position change over time.It will be appreciated by those skilled in the art that
, controller 10 in different moments to the different location of liquid crystal display panel 20 apply that voltage value is different respectively and voltage value at any time
The deflection voltage of variation means, at a time, the different location of from controller 10 to liquid crystal display panel 20 applies inclined respectively
The voltage value for turning voltage is different, and the voltage value of deflection voltage that the different location of controller 10 to liquid crystal display panel 20 applies respectively
Change over time.Wherein, the variation for the deflection voltage that the different location of controller 10 to liquid crystal display panel 20 applies respectively can be with
Be regular variation can also change at random, the deflection electricity that the different location of from controller 10 to liquid crystal display panel 20 applies respectively
The changing rule of pressure can be the same or different.
Deflection direction of the liquid crystal 201 of different location under the action of different deflection voltages is different, since liquid crystal 201 has
Birefringent characteristic, the refractive index of the liquid crystal of different deflection states is different, is incident on the position of laser in the laser beam of liquid crystal 201
Phase information can deflect direction difference with liquid crystal 201 and change.In the speckle device provided by the embodiment that disappears, controller 10 is in difference
The deflection voltage that moment applies voltage value difference respectively to the different location of liquid crystal display panel 20 and voltage value changes over time, so that
It obtains the deflection direction difference of the liquid crystal 201 of different location in liquid crystal display panel 20 and the deflection direction of each liquid crystal 201 changes over time.
That is, the deflection direction due to the liquid crystal 201 of different location in liquid crystal display panel 20 is different, it is incident on the liquid crystal of different location
The phase delay of laser is also just different in 201 laser beam, will not form interference in laser beam between laser, therefore also just eliminate
The laser speckle phenomenon of incoming laser beam.In addition, the deflection direction of the liquid crystal 201 of each position changes over time and further enhances
Eliminate the effect of the laser speckle phenomenon of incoming laser beam.Those skilled in the art are it will be appreciated that the deflection electricity applied
Pressure voltage value, which changes with time, is defined in the input voltage range of liquid crystal display panel 20, although the deflection voltage voltage value applied
It changes over time, but the variation cannot exceed the range limited, otherwise can damage liquid crystal display panel 20.
Further illustrate that the present embodiment eliminates the principle of laser speckle below by function formula：The wave function of laser is：Wherein A is the amplitude function of wave function,Phase function for wave function；It is total from coherent wave letter
Number is：For the hot spot of small size, hot spot shakes
Width approximately equal, i.e. Axi=Ayj, and the liquid crystal rotation angle of each position is different, so leading to the position phase of each position not
With simultaneously random arrangement, then Because X-direction
Mutually random with the position of Y-direction, whole coherent function after being added is 0 when in use.Incident laser can thus be eliminated
The laser speckle phenomenon of beam.
In the specific implementation, liquid crystal display panel 20 include first substrate 202, second substrate 203, set on first substrate 202 with
Liquid crystal 201 between second substrate 203, first substrate 202 are equipped with the different first electrode 2021 and 2022 in position, second substrate
203 are equipped with the second electrode 2031 opposite with first electrode 2021 and the second electrode 2032 opposite with first electrode 2022, control
Device 10 processed applies the first deflection voltage and to first electrode 2022 and second electrode to first electrode 2021 and second electrode 2031
2032 apply the second deflection voltage.It will be appreciated by persons skilled in the art that the structure only with controller 10 to liquid crystal display panel
The situation of the deflection voltage citing that 20 two different locations apply voltage value difference respectively and voltage value changes over time, control
Device 10 to more than two different locations of liquid crystal display panel 20 applies that voltage value is different respectively and voltage value change over time it is inclined
It is similar to turn voltage, details are not described herein.
In the specific implementation,
A kind of optional mode is that controller 10 applies voltage value as sine wave respectively to the different location of liquid crystal display panel 20
The deflection voltage of form.For shown in Fig. 1, i.e. the upper and lower position of controller 10 to liquid crystal display panel 20 applies voltage value respectively
It is different to meet the deflection voltage value that mutually up and down position applies in the same time for the deflection voltage of sine wave, it can be used
Making two sine waves, there are the modes such as phase difference.It can meet in this way to the different location of liquid crystal display panel 20 and apply voltage value respectively not
With and the deflection voltage that changes over time of voltage value, meanwhile, the voltage value easily modulation of deflection voltage and easy to control；
Another optional mode is that controller 10 alternately applies first voltage respectively to the different location of liquid crystal display panel 20
Value and second voltage value deflection voltage, can also meet to the different location of liquid crystal display panel 20 apply voltage value respectively not in this way
With (such as the Period Length of the first voltage value and second voltage value the deflection voltage by making to apply to different location is different
Or the modes such as sequential is asynchronous) and the deflection voltage that changes over time of voltage value, meanwhile, the voltage value of deflection voltage is also easily modulated
It is and easy to control.Further, the first voltage value or second voltage value are 0V, can reduce energy consumption in this way and not interfere with the effect of dissipation spot
Fruit.Further, controller 10 to the different location of liquid crystal display panel 20 applies the deflection voltage of the first voltage value and applies the respectively
The duration of the deflection voltage of two voltage values is 0.5-1ms, alternately applies the first voltage value and the second electricity with the period of 0.5-1ms
Pressure value can ensure the effect of dissipation spot.
As shown in Fig. 2, the present embodiment additionally provides a kind of laser light source, laser 30 including shoot laser and above-mentioned disappear
Speckle device, the laser beam that laser 30 is emitted can eliminate laser speckle phenomenon after liquid crystal display panel 20, further, swash
In laser beam exits light path between light device 30 and liquid crystal display panel 20, laser light source further includes the hair for laser 30 to be emitted
Scattered laser beam is converted to the collimation lens 40 of collimated laser beam.
The present embodiment additionally provides a kind of laser projection system, including above-mentioned laser light source.
In the description of the present invention, it should be noted that term the instructions such as " on ", " under " orientation or position relationship
To be based on orientation shown in the drawings or position relationship, being for only for ease of description the utility model and simplifying description, without referring to
Show or imply that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, therefore cannot manage
It solves as the limitation to the utility model.Unless otherwise clearly defined and limited, term " installation ", " connected ", " connection " should be done
It broadly understood, for example, it may be being fixedly connected or being detachably connected or be integrally connected；Can be mechanical connection,
It can also be electrical connection；It can be directly connected, can also be indirectly connected by intermediary, can be inside two elements
Connection.For the ordinary skill in the art, it can understand above-mentioned term in the utility model as the case may be
Concrete meaning.
It should be noted that relational terms such as first and second and the like are only in the description of the present invention,
Only it is used for distinguishing one entity or operation from another entity or operation, without necessarily requiring or implying these realities
There are any actual relationship or orders between body or operation.Moreover, term " comprising ", "comprising" or its it is any its
He is intended to non-exclusive inclusion by variant, so that process, method, article or equipment including a series of elements are not
Only include those elements, but also including other elements that are not explicitly listed or further include for this process, method,
Article or the intrinsic element of equipment.In the absence of more restrictions, it is wanted by what sentence "including a ..." limited
Element, it is not excluded that also there are other identical elements in the process, method, article or apparatus that includes the element.
Obviously, above-described embodiment of the utility model is only intended to clearly illustrate the utility model example, and
It is not the restriction to the embodiment of the utility model, for those of ordinary skill in the art, in above description
On the basis of can also make other variations or changes in different ways, all embodiments can not be exhaustive here,
It is every to belong to obvious changes or variations that the technical solution of the utility model is extended out still in the utility model
The row of protection domain.
Claims (8)
- The speckle device 1. one kind disappears, which is characterized in that the liquid crystal display panel including controller and in laser beam exits light path, institute The deflection voltage that controller applies voltage value difference respectively to the different location of liquid crystal display panel and voltage value changes over time is stated, with So that the deflection direction of the liquid crystal of different location is different in liquid crystal display panel and the deflection direction of the liquid crystal of each position changes over time.
- 2. the speckle device according to claim 1 that disappears, which is characterized in that the liquid crystal display panel includes first substrate, second Substrate, the liquid crystal between first substrate and second substrate, the first substrate are equipped with the different first electrode in multiple positions, The second substrate be equipped with multiple second electrodes opposite with first electrode, first electrode from the controller to different location with Opposite second electrode applies deflection voltage respectively.
- 3. the speckle device according to claim 1 that disappears, which is characterized in that the controller is to the different location of liquid crystal display panel Apply the deflection voltage that voltage value is sine wave respectively.
- 4. the speckle device according to claim 1 that disappears, which is characterized in that the controller is to the different location of liquid crystal display panel Alternately apply the deflection voltage of the first voltage value and second voltage value respectively.
- 5. the speckle device according to claim 4 that disappears, which is characterized in that the first voltage value or second voltage value are 0V。
- 6. the speckle device according to claim 4 that disappears, which is characterized in that the controller is to the different location of liquid crystal display panel The duration of the deflection voltage for applying the first voltage value respectively and the deflection voltage for applying second voltage value is 0.5-1ms.
- 7. a kind of laser light source includes the laser of shoot laser beam, which is characterized in that further includes as appointed in claim 1-6 The speckle device that disappears described in one.
- 8. a kind of laser projection system, which is characterized in that including laser light source as claimed in claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721664634.2U CN207571403U (en) | 2017-12-04 | 2017-12-04 | Disappear speckle device, laser light source and laser projection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721664634.2U CN207571403U (en) | 2017-12-04 | 2017-12-04 | Disappear speckle device, laser light source and laser projection system |
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| Publication Number | Publication Date |
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| CN207571403U true CN207571403U (en) | 2018-07-03 |
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| CN201721664634.2U Active CN207571403U (en) | 2017-12-04 | 2017-12-04 | Disappear speckle device, laser light source and laser projection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111596518A (en) * | 2020-06-04 | 2020-08-28 | 中影光峰激光影院技术（北京）有限公司 | Speckle-free laser projection equipment |
-
2017
- 2017-12-04 CN CN201721664634.2U patent/CN207571403U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111596518A (en) * | 2020-06-04 | 2020-08-28 | 中影光峰激光影院技术（北京）有限公司 | Speckle-free laser projection equipment |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201020 Address after: 261031 north of Yuqing street, east of Dongming Road, high tech Zone, Weifang City, Shandong Province (Room 502, Geer electronic office building) Patentee after: GoerTek Optical Technology Co.,Ltd. Address before: 266100 Qingdao, Laoshan District, North House Street investment service center room, Room 308, Shandong Patentee before: GOERTEK TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |