CN109425996A - A kind of display screen system of improving laser Projection Display image quality - Google Patents
A kind of display screen system of improving laser Projection Display image quality Download PDFInfo
- Publication number
- CN109425996A CN109425996A CN201710747248.8A CN201710747248A CN109425996A CN 109425996 A CN109425996 A CN 109425996A CN 201710747248 A CN201710747248 A CN 201710747248A CN 109425996 A CN109425996 A CN 109425996A
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- China
- Prior art keywords
- display screen
- laser projection
- image quality
- excitation coil
- driver
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/48—Laser speckle optics
Abstract
The invention discloses a kind of display screen systems of improving laser Projection Display image quality, including display screen, driver, the driver is made of bracket, spring leaf, excitation coil, ferromagnetism ring and shell, the excitation coil is arranged between bracket and shell, the spring leaf is arranged between excitation coil and bracket, and the ferromagnetism ring is arranged between excitation coil and shell；The excitation coil has electric signal input terminal；The driver receives the positive back side of lasing area in display screen and display screen is rigidly connected.By the display screen system for implementing improving laser Projection Display image quality of the invention, the non-linear cycle that driver drives laser projection display screen surface to generate specific frequency changes, to weaken, destroy space and the temporal coherence of incidence angle laser, speckle phenomena caused by laser projection, effective improving laser Projection Display image quality can be effectively improved.
Description
Technical field
The present invention relates to the aobvious of a kind of laser projection display screen system more particularly to a kind of improving laser Projection Display image quality
Display screen system.
Background technique
The laser light source technology of large-size screen monitors Projection Display has that brightness is high, colour gamut is wide, the excellent characteristics such as bright in luster, but swashs
Light has the high coherence in space, time simultaneously；The spatial coherence is characterized as in the light field that same light source is formed, different
It can be interfered between the light of place synchronization；The temporal coherence is characterized as in the light field that same light source is formed, together
It can be interfered between the light of one place different moments.
When the rough surface of laser light incident to screen, the reflection light that micro- surface is in different benchmark can be sent out in space
Raw irregular space interference, temporal interference phenomenon, form irregular strip or graininess speckle, i.e. laser speckle；It is described
Laser speckle phenomenon can seriously affect image quality, show in double-colored and Multi Colour Lasers display system more significant, it is therefore necessary to
Speckle phenomena is effectively treated in laser display system.
Since laser comes out, in the application of display field, the inhibition of speckle is always item problem, is carried out in industry
A large amount of researchs, once attempted light source, light path devices, display chip, in terms of speckle phenomena is carried out
Improve, but there is low efficiency, the shortcomings such as at high cost, structure is complicated, not yet occurs technology maturation in industry at present, can criticize
The laser display dissipation spot technical solution for measuring application, it is really practical seriously to constrain laser display.
Summary of the invention
In order to solve the problems, such as laser speckle, the purpose of the present invention is to provide a kind of improving laser Projection Display image quality
Display screen system, to overcome because of laser speckle caused by the undesirable defect of image quality.
The purpose of the invention is achieved by the following technical solution:
A kind of display screen system of improving laser Projection Display image quality, including display screen, which is characterized in that it further include driver,
The driver is made of bracket, spring leaf, excitation coil, ferromagnetism ring and shell, excitation coil setting bracket with
Between shell, the spring leaf is arranged between excitation coil and bracket, and the ferromagnetism ring is arranged in excitation coil and shell
Between；The excitation coil has electric signal input terminal；The driver receives the positive back side of lasing area in display screen and shows
Display screen rigid connection.
Further, the shell is made of metal, and shell has the shape of " recessed " shape or " one " shape.
Further, the driver overall weight is more than or equal to the equivalent area that the display screen is contacted with driver
Weight.
Further, the electric signal is a specific alternation electric signal, and frequency is more than or equal to 50Hz.
Further, the remanent magnetization of the ferromagnetism ring is more than or equal to 0.2T.
Further, the excitation coil total impedance is less than or equal to 20 Ω.
Further, the array that is arranged as of the driver on a display screen arranges.
By implementing the display screen system of improving laser Projection Display image quality of the invention, driver drives laser projection aobvious
Display screen surface generates the non-linear cycle variation of specific frequency, to weaken, destroy space and the time phase of incidence angle laser
Stemness can be effectively improved speckle phenomena caused by laser projection, effective improving laser Projection Display image quality.
Detailed description of the invention
Fig. 1 is the display screen system structural schematic diagram of improving laser Projection Display image quality；
Fig. 2 is the structure seperated schematic diagram of driver；
Fig. 3 is displacement diagram of the display screen under driver working condition.
Fig. 4 is the riding position schematic diagram of driver on a display screen.
Specific embodiment
The present invention is described in further detail below with reference to embodiment.
Embodiment
As shown in Figure 1, a kind of display screen system of improving laser Projection Display image quality, by display screen 2 and 1 group of driver
At.The display screen 2 is made of screen 21, screen hanging frame 22 and connector 23, and screen 21 is arranged in screen hanging frame
In 22 and form rigid connection, screen hanging frame 22 and 23 flexible connection of connector.The setting of driver 1 is in screen 21 and connection
Between part 23, and it is rigidly connected with screen 21.
As shown in Fig. 2, the driver 1 is by shell 11, strong magnetic ring 12, excitation coil 13, spring leaf 14 and bracket 15
Composition, excitation coil 13 are arranged between shell 11 and bracket 15, the setting of strong magnetic ring 12 excitation coil 13 and shell 11 it
Between, it is rigidly connected with shell 11, and keep certain space length with excitation coil 13；Spring leaf 14 is arranged in excitation coil 13
Between bracket 15, it is rigidly connected with excitation coil 13；Spring leaf 14 and shell are rigidly connected；14 rigidity of bracket 15 and spring leaf
Connection；Excitation coil 13 has electric signal input terminal.
As shown in figure 4, driver 1 and screen 21 are rigidly connected, and it is arranged in certain specific array.
As shown in Figure 1, Figure 2, Figure 3 shows, the electric signal of specific frequency is loaded in the electric signal input terminal of excitation coil 13, this
When due to the presence of strong magnetic ring high-intensity magnetic field, causing the interaction force of high-intensity magnetic field and electric signal to generate, excitation coil 13, bullet
Reed 14 linearly moves back and forth under the action of the active force with bracket 15, and then drives 21 contact surface of screen linearly reciprocal
Movement drives it integrally to generate physical displacement and deformation, such as scheme due to itself rigidity and elasticity of screen 21 by contact portion
Shown in the 211 of 3 and 212, so that realizing improves laser projection speckle.
As one of optimal technical scheme, 1 overall weight of driver requires connected to it equivalent more than or equal to display screen 2
The weight of area.
As one of another optimal technical scheme, shell 11 is made of metal, such as mild steel, medium carbon steel, high-carbon steel, conjunction
Perhaps the shape of plastic cement and composite metal shell 11 is " recessed " shape or " one " shape to gold.
As one of another optimal technical scheme, the remanent magnetization of strong magnetic ring 12 requires to be more than or equal to 0.2T, by
Kicker magnet is made, such as ferro-gum, samarium cobalt magnet, ferrite lattice, ndfeb magnet, alnico magnet.
As one of another optimal technical scheme, 13 total impedance of excitation coil is less than or equal to 20 Ω, is led by closo enamel-cover
Coil is made, it is desirable that light-weight, easy heat radiation, such as loop inner core are paper roll, resin plate volume, metallic coil.
As one of another optimal technical scheme, spring leaf 14 requires enough rigidity and amount of deflection, i.e., receive it is sharp
It can respond rapidly to when encouraging the thrust or pulling force of device 1, can equally be responded rapidly to when stress size, direction change, spring leaf 14
Shape is " L " type, " S " type or T-shape.
As one of another optimal technical scheme, screen 2 is made of metal, resin or glass, have it is enough rigidity and
Amount of deflection can be responded rapidly in the thrust or pulling force for receiving driver 1, can equally rapidly when stress size, direction change
Response, while the deformation that part can be visually identified itself is not generated；2 linear reciprocal movement position of sub-screen is acted in driver 1
It moves and requires to be more than or equal to 1/4 visible wavelength, screen 2 returned to the original state time less than or equal to 0.2 second after deviating.
As one of another optimal technical scheme, connector 23 is made of elastic material, when screen 21 is activated that device 1 is made
Used time generate instant offset variable can connected piece 23 absorb or weaken, will not to screen hanging frame 22 generate physics push
It acts on so as to cause deformation or displacement, screen hanging frame 22 and supporter, such as video wall, rigid connection.
As one of another optimal technical scheme, the spy through particular modulation of 13 electric signal input terminal of excitation coil input
Determine the alternation electric signal that frequency is more than or equal to 50Hz.
The principle that technical solution of the present invention uses is, by giving the specific alternation electric signal of excitation coil 13, driver 1
Linear reciprocal movement can be generated, and then the screen 21 of driving display screen 2 shakes, but screen 21 does not generate part and can visually be distinguished
The deformation of knowledge generates periodical dynamic microdisplacement and then weakens or even eliminate laser projection in screen to reach 21 surface of screen
The speckle formed on 21, effective improving laser project image quality.
By the observation in standard implies, after implementing technical solution of the present invention, successively in the list of Projection Display
Speckle improvement is visually observed under colour field, tableaux, dynamic menu, final subjectivity evaluation result is whether to belong to the neck
Domain professional technician, can not all perceive the speckle in this system show it is bad；Entire picture is carried out with optical instrument again
The acquisition of distribution of light intensity data, with the standard deviation of distribution of light intensity divided by average optical field intensity, obtained speckle contrast data are real
Surveying is 3.2%, lower than visual cognizable 4% standard, has reached good speckle and has weakened effect；Simultaneously to laser display effect into
Row subjective assessment does not find that this system influences display picture or other possible negative senses of aspect.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.It is all within the spirit and principles in the present invention, it is made any
Modification, equivalent replacement, improvement etc. should be included within scope of the invention.
Claims (7)
1. a kind of display screen system of improving laser Projection Display image quality, including display screen, which is characterized in that further include excitation
Device, the driver are made of bracket, spring leaf, excitation coil, ferromagnetism ring and shell, and the excitation coil is arranged in bracket
Between shell, the spring leaf is arranged between excitation coil and bracket, and the ferromagnetism ring setting is in excitation coil and outside
Between shell；The excitation coil has electric signal input terminal；The driver display screen receive lasing area the positive back side with
Display screen rigid connection.
2. a kind of display screen system of improving laser Projection Display image quality according to claim 1, which is characterized in that described
Shell is made of metal, and shell has the shape of " recessed " shape or " one " shape.
3. a kind of display screen system of improving laser Projection Display image quality according to claim 1, which is characterized in that described
Driver overall weight is more than or equal to the weight for the equivalent area that the display screen is contacted with driver.
4. a kind of display screen system of improving laser Projection Display image quality according to claim 1, which is characterized in that described
Electric signal is a specific alternation electric signal, and frequency is more than or equal to 50Hz.
5. a kind of display screen system of improving laser Projection Display image quality according to claim 1, which is characterized in that described
The remanent magnetization of ferromagnetism ring is more than or equal to 0.2T.
6. a kind of display screen system of improving laser Projection Display image quality according to claim 1, which is characterized in that described
Excitation coil total impedance is less than or equal to 20 Ω.
7. a kind of display screen system of improving laser Projection Display image quality according to claim 1, which is characterized in that described
The array that is arranged as of driver on a display screen arranges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710747248.8A CN109425996A (en) | 2017-08-28 | 2017-08-28 | A kind of display screen system of improving laser Projection Display image quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710747248.8A CN109425996A (en) | 2017-08-28 | 2017-08-28 | A kind of display screen system of improving laser Projection Display image quality |
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| CN109425996A true CN109425996A (en) | 2019-03-05 |
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| CN201710747248.8A Pending CN109425996A (en) | 2017-08-28 | 2017-08-28 | A kind of display screen system of improving laser Projection Display image quality |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112099248A (en) * | 2020-09-28 | 2020-12-18 | 中国华录集团有限公司 | Laser speckle weakening device and method based on magneto-optical effect depolarization |
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| CN1665285A (en) * | 2004-03-03 | 2005-09-07 | Lg电子有限公司 | Device for reducing deteriroation of image quality in display using laser |
| US20080049315A1 (en) * | 2006-08-28 | 2008-02-28 | Seiko Epson Corporation | Screen and projector |
| CN102375248A (en) * | 2010-08-19 | 2012-03-14 | 索尼公司 | Optical apparatus and display apparatus |
| CN104142602A (en) * | 2013-05-09 | 2014-11-12 | 图象公司 | Methods and systems of vibrating a screen |
| CN204866439U (en) * | 2015-07-08 | 2015-12-16 | 恩益禧数码应用产品贸易（上海）有限公司 | Magnetic force vibrating device and vibrating projection screen |
| US20160139496A1 (en) * | 2014-09-08 | 2016-05-19 | Reald Inc. | Screen vibration for reducing speckle |
| CN105940346A (en) * | 2014-01-03 | 2016-09-14 | 杜比实验室特许公司 | Moveably-coupled screen actuators |
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2017
- 2017-08-28 CN CN201710747248.8A patent/CN109425996A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1665285A (en) * | 2004-03-03 | 2005-09-07 | Lg电子有限公司 | Device for reducing deteriroation of image quality in display using laser |
| US20080049315A1 (en) * | 2006-08-28 | 2008-02-28 | Seiko Epson Corporation | Screen and projector |
| CN102375248A (en) * | 2010-08-19 | 2012-03-14 | 索尼公司 | Optical apparatus and display apparatus |
| CN104142602A (en) * | 2013-05-09 | 2014-11-12 | 图象公司 | Methods and systems of vibrating a screen |
| CN105940346A (en) * | 2014-01-03 | 2016-09-14 | 杜比实验室特许公司 | Moveably-coupled screen actuators |
| US20160139496A1 (en) * | 2014-09-08 | 2016-05-19 | Reald Inc. | Screen vibration for reducing speckle |
| CN204866439U (en) * | 2015-07-08 | 2015-12-16 | 恩益禧数码应用产品贸易（上海）有限公司 | Magnetic force vibrating device and vibrating projection screen |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112099248A (en) * | 2020-09-28 | 2020-12-18 | 中国华录集团有限公司 | Laser speckle weakening device and method based on magneto-optical effect depolarization |
| CN112099248B (en) * | 2020-09-28 | 2023-10-24 | 中国华录集团有限公司 | Device and method for weakening laser speckles based on depolarization of magneto-optical effect |
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Application publication date: 20190305 |
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