CN209388101U - A kind of laser projection system - Google Patents
A kind of laser projection system Download PDFInfo
- Publication number
- CN209388101U CN209388101U CN201821931034.2U CN201821931034U CN209388101U CN 209388101 U CN209388101 U CN 209388101U CN 201821931034 U CN201821931034 U CN 201821931034U CN 209388101 U CN209388101 U CN 209388101U
- Authority
- CN
- China
- Prior art keywords
- light
- laser
- projected
- projection
- blue
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Projection Apparatus (AREA)
Abstract
The utility model discloses a kind of laser projection systems, including laser light source, brightness control module, current control module and projection module；The laser light source includes that multiple luminescence units and respectively each luminescence unit provide the power supply unit of input current；For the brightness control module for providing the light emission luminance of each luminescence unit in laser light source, the light emission luminance is corresponding with the gray value of each pixel in image data image to be projected；The current control module is used to input corresponding input current so that the laser light source issues and the corresponding uneven light image to be projected to each luminescence unit according to the light emission luminance of each luminescence unit；The uneven light and described image data projection that the projection module is used to issue based on the laser light source obtain it is described image to be projected, the utility model can, promote the dynamic range of projected image, promote viewing and experience.
Description
Technical field
The utility model relates to Color Laser Projection Technology fields.More particularly, to a kind of laser projection system.
Background technique
Current laser projection system generallys use laser light source and provides projected light beam.Laser light source includes red, green and blue
Semiconductor.During laser projection, by issued respectively to red, green and blue semiconductor input current red light, green light and
Blue light, red light, green light and blue light merge to form projected light beam, further by optical tunnel to the even light of projected light beam,
By optical module to projection light machine is inputted after the projected light beam shaping and refractive power of homogenization, projection light machine is according to control signal control
The percent of pass of projected light beam processed simultaneously projects to form projected image by camera lens.
As shown in Figure 1, the quantity of red, green and blue semiconductor is respectively a, b and c, red, green and blue in traditional laser light source
The quantity of semiconductor is different, and all luminescence units, using unified power supply, the input current for flowing into each luminescence unit is identical, then
The brightness for the light that each luminescence unit issues is identical, can only be by controlling projection light machine hence for the image quality of projected image
It controls, limits the increased quality of projected image.
Utility model content
The purpose of this utility model is to provide a kind of laser projection systems, according to Luminance Distribution image to be projected to every
A luminescence unit provides input current respectively, to form the projected light beam of uneven light, promotes the dynamic range of projected image.
In order to achieve the above objectives, the utility model adopts the following technical solutions:
The utility model discloses a kind of laser projection systems, including laser light source, brightness control module, current control mould
Block and projection module；
The laser light source includes that multiple luminescence units and respectively each luminescence unit provide the power supply of input current
Device；
The brightness control module is for providing the light emission luminance of each luminescence unit in laser light source, the light emission luminance
It is corresponding with the gray value of pixel each in image data image to be projected；
The current control module according to the light emission luminance of each luminescence unit to each luminescence unit for inputting
Corresponding input current is so that the laser light source issues and the corresponding uneven light image to be projected；
The uneven light and described image data projection that the projection module is used to issue based on the laser light source obtain
It is described image to be projected.
Preferably, each luminescence unit includes emitting red light group, green emitting group and blue-light-emitting group；
Emitting red light group, green emitting group are identical with the quantity of blue-light-emitting group.
Preferably, the emitting red light group includes red laser semiconductor, and the green emitting group includes green laser half
Conductor, the blue-light-emitting group include blue laser semiconductor；Or
The emitting red light group includes blue laser semiconductor and red fluorescence powder, and the green emitting group includes that blue swashs
Photosemiconductor and green emitting phosphor, the blue-light-emitting group include blue laser semiconductor and blue colour fluorescent powder.
It preferably, further include successively being set along luminous optical path in each emitting red light group, green emitting group and blue-light-emitting group
Optical tunnel, the first remittance light optical module and the shaping optical module set；
Each luminescence unit includes forming all emitting red light groups, green emitting group and blue-light-emitting group remittance light unevenly
Second remittance light optical module of light.
Preferably, the aspect ratio of the uneven light is with each luminescence unit sending by the shaping optics group
The aspect ratio of projected light after part shaping is identical.
Preferably, the projection module includes for inputting signal processing unit image to be projected and being located at the laser
Shaping and refractive power optical module, projection light machine and projection lens in the optical path for the uneven light that light source issues；
The uneven light that the shaping and refractive power optical module are used to issue the laser light source carries out shaping and refractive power
Form projected light beam；
The signal processing unit forms ray machine for receiving image data image to be projected, according to described image data
Control signal is simultaneously transmitted to the projection light machine；
The projection light machine is used to project to be formed image to be projected and led to based on the projected light beam and the control signal
Cross the camera lens projection.
For the utility model in laser projection, the light emission luminance of each luminescence unit is according to figure to be projected in laser light source
The gray value of each pixel determines in the image data of picture, according to the light emission luminance of each luminescence unit to each luminous list
Member inputs corresponding input current so that the laser light source issues and the corresponding uneven light image to be projected.This is practical
The control of the novel input current by each luminescence unit realizes that different luminescence units can have different light emission luminance, will be every
The light emission luminance of a luminescence unit is corresponding with Luminance Distribution image to be projected, to form the projected light beam of uneven light, not
It is image to be projected that this is projected on the basis of uniform light, the brightness of projected image can be enhanced, and the dynamic of the image that projection is formed is promoted
State range.
Detailed description of the invention
Specific embodiment of the present utility model is described in further detail with reference to the accompanying drawing.
Fig. 1 shows the schematic diagram of laser projection system in the prior art；
Fig. 2 shows a kind of schematic diagrames of one specific embodiment of laser source system of the utility model.
Fig. 3 shows a kind of one of the application schematic diagram of the utility model one specific embodiment of laser projection method；
Fig. 4 shows the two of a kind of application schematic diagram of one specific embodiment of laser projection method of the utility model；
Fig. 5 shows the whole of the light that luminescence unit issues in a kind of the utility model one specific embodiment of laser projection method
The schematic diagram of shape；
Specific embodiment
In order to illustrate more clearly of the utility model, the utility model is done into one below with reference to preferred embodiments and drawings
The explanation of step.Similar component is indicated in attached drawing with identical appended drawing reference.It will be appreciated by those skilled in the art that below
Specifically described content is illustrative and be not restrictive, and should not be limited the protection scope of the present invention.
As shown in Fig. 2, present embodiment discloses a kind of laser projection system, including laser light source, brightness control module, electricity
Flow control module, projection module and power supply unit.It wherein, include multiple luminescence units in laser light source, each luminescence unit is only
Vertical power supply is to realize that different luminescence units can have different light emission luminance.
Wherein, the brightness control module can provide the light emission luminance of each luminescence unit in laser light source, described to shine
Brightness is corresponding with the gray value of each pixel in image data image to be projected.
The current control module can be according to the light emission luminance of each luminescence unit to the input pair of each luminescence unit
The input current answered is so that the laser light source issues and the corresponding uneven light image to be projected；
The uneven light and described image data projection that the projection module can be issued based on the laser light source obtain institute
It states image to be projected.
For the utility model in laser projection, the light emission luminance of each luminescence unit is according to figure to be projected in laser light source
The gray value of each pixel determines in the image data of picture, is shone according to the light emission luminance of each luminescence unit to each
Unit inputs corresponding input current so that the laser light source issues and the corresponding uneven light image to be projected.This reality
Realize that different luminescence units there can be different light emission luminance with the control of the novel input current by each luminescence unit, it will
The light emission luminance of each luminescence unit is corresponding with Luminance Distribution image to be projected, to form the projected light beam of uneven light,
It is image to be projected that this is projected on the basis of uneven light, the brightness of projected image can be enhanced, be promoted the image that projection is formed
Dynamic range.
In a preferred embodiment, each luminescence unit is connect with power supply unit respectively.Not with traditional laser light source
Together, power supply unit is respectively each luminescence unit power supply, and each luminescence unit is individually powered, then can be made by power supply unit each
The input current of luminescence unit is different, to change the uniformity of the projected light beam of laser light source sending, keeps projected light beam corresponding
The brightness in the region of different luminescence units is different, forms the projected light beam of brightness irregularities.It is current by obtaining in the present embodiment
Image data image to be projected is correspondingly formed the current control information of power supply unit, which is inputted and is powered
Device can make power supply unit form the different input currents for inputting each luminescence unit.
It, can be according to each pixel in image to be projected and each pixel in order to improve the Dynamically Announce range of projected image
Luminance Distribution situation image to be projected can be obtained in gray value, adjusts different luminescence units according to Luminance Distribution image to be projected
Input current, the projected light beam for issuing laser light source be have it is identical with Luminance Distribution trend image to be projected uneven
Light uses the uneven light as projected light beam, projects that this is image to be projected on the basis of uneven light, can be to projected image
Brightness enhancing, promote the dynamic range of projected image.Wherein, the projection image to be projected that can be single image, can also be with
It is the projection of the wherein frame image in any other multimedia file, such as can be video or PPT file etc..
In one embodiment, each luminescence unit may include emitting red light group, green emitting group and blue hair
Light group.Wherein, emitting red light group, green emitting group are identical with the quantity of blue-light-emitting group, in order to brightness control.Such as Fig. 3 institute
Showing, each luminescence unit includes D red laser semiconductor, D green laser semiconductor and D blue laser semiconductor,
Middle D can be for 1 or multiple, emitting red light group, green emitting group and the blue hair for including in different luminescence units
The quantity of light group can not also it is identical, it can be achieved that different luminescence units different light emission luminance, the utility model do not make
It limits.
Red laser semiconductor, green laser semiconductor and blue laser semiconductor issue red when electric current inputs respectively
Light, green light and blue light form white light with further fusion.Red laser semiconductor, green laser in each luminescence unit
The quantity of semiconductor and blue laser semiconductor is D, convenient for luminescence unit light emission luminance by unified standard control, to each
The power supply of laser semiconductor controls respectively, then the brightness of each laser semiconductor is different and can pass through input current tune
It is whole.In other embodiments, each emitting red light group may include blue laser semiconductor and red fluorescence powder, each green hair
Light group may include blue laser semiconductor and green emitting phosphor, and each blue-light-emitting group may include blue laser semiconductor and blue
Fluorescent powder, blue laser semiconductor issue blue light under the action of input current, and it is glimmering that blue light irradiates red fluorescence powder, green
Light powder and blue colour fluorescent powder can issue red light, green light and blue light respectively, form white light with further fusion.In other realities
It applies in mode, each luminescence unit can also include Yellow luminous unit, which includes blue laser semiconductor
And yellow fluorescent powder, yellow fluorescent powder issue sodium yellow under the irradiation for the blue light that blue laser semiconductor issues, with shine
Red light, green light and blue light in unit merge to form white light.
In a preferred embodiment, laser light source can divide multiple luminescence units in design, in order to guarantee and laser
The aspect ratio of each light emitting cell region is preferably set as the aspect ratio one with laser light source entirety by the consistency of dimension of light source
In sample, such as the present embodiment, the transverse and longitudinal ratio of the entire size of laser light source is 1:1.89, then can be by each luminescence unit in length and breadth
Than being set as 1:1.89, then in determining each luminescence unit when the arrangement of laser semiconductor, longitudinal laser semiconductor number can root
It is obtained according to formula x=0.346D, wherein longitudinal laser semiconductor number can be taken by rounding up to x in each luminescence unit
Integer obtains.Lateral laser semiconductor number can be obtained according to formula y=0.654D, and lateral laser is partly led in each luminescence unit
Body number can be by obtaining y round number.
In a preferred embodiment, the light emission luminance of each luminescence unit can obtain in the above manner in laser light source
To: it determines the pixel of maximum gradation value in described image data, shining where the pixel of the maximum gradation value is set
The light emission luminance of unit is maximum luminousing brightness.According to the gray value of the pixel of other luminescence units and the maximum gradation value
Ratio determine the light emission luminance of other luminescence units.Preferably, the light emission luminance of each luminescence unit and the maximum shine
The ratio of brightness can and each luminescence unit maximum gradation value it is identical as the ratio of the maximum gradation value.
In a preferred embodiment, current control module can provide the current control information of power supply unit, the electric current control
Information processed can power respectively for each luminescence unit.Partly led according to each luminescence unit red laser semiconductor, green laser
The current control information of the input current of body and blue laser semiconductor formation power supply unit.The current control information is inputted
The power supply unit is so that the power supply unit inputs corresponding input current to each luminescence unit.
For example, not according to the luminous power of red laser semiconductor, green laser semiconductor and blue laser semiconductor
Together, when red laser semiconductor, green laser semiconductor are identical with the quantity of blue laser semiconductor in each luminescence unit,
The input current of red laser semiconductor, green laser semiconductor and blue laser semiconductor need to control in proportion, so as to issue
Feux rouges, green light and blue light can merge to form white light.For example, in the present embodiment, when can form white light, red laser semiconductor
Maximum input current is 1.82A, and the maximum input current of green laser semiconductor is 1.33A, the maximum of blue laser semiconductor
Input current is 1A.Then power supply unit described in entire laser light source is to the red laser semiconductor of each luminescence unit, green
The ratio for the maximum input current that laser semiconductor and blue laser semiconductor provide is 1.82:1.33:1.
In a preferred embodiment, the ratio of the light emission luminance of each luminescence unit and the maximum luminousing brightness and every
The maximum gradation value of a luminescence unit is identical as the ratio of the maximum gradation value.For example, can be by the pixel of maximum gradation value
The input current of the red laser semiconductor of corresponding luminescence unit, green laser semiconductor and blue laser semiconductor is set respectively
For 1.82A, 1.33A and 1A, then red laser semiconductor, green laser semiconductor and blue laser are partly led in other luminescence units
The input current of body is set to 1.82A*a%, 1.33A*a% and 1A*a%, and wherein a% is the maximum ash of each luminescence unit
The ratio of angle value and the maximum gradation value of the maximum brightness luminescence unit.
Preferably, the current control information can be the PWM count based on timeline according to file, and PWM count is according to right in file
Different in the control of the power supply circuit of different luminescence units, the output electric current by controlling power supply circuit makes different luminescence units
The luminous brightness of laser semiconductor is different.
Preferably, as shown in figure 4, the uneven light that laser light source difference luminescence unit issues need to first pass through shaping and even light
Light, which can be finally converged, to form the light for issuing all luminescence units forms the projected light beam of rectangle.As shown in figure 5, each list that shines
The light that member issues is round light beam, and be eventually used for projection is rectangular light beam, and therefore, it is necessary to first issue to each luminescence unit
Round light beam carry out shaping and obtain rectangular light beam, and rectangular light beam is homogenized, the light for issuing a luminescence unit is equal
Even.Finally, forming the projected light beam of rectangle to the light remittance light that all luminescence units are formed.It can to the projected light beam of rectangular light beam
Further by optical module shaping and refractive power, so that projected light beam can input projection light machine for projecting.Wherein, after shaping
Projected light beam aspect ratio it is preferably identical as the aspect ratio of each luminescence unit, i.e., the aspect ratio of each luminescence unit is 1:
1.89, then the aspect ratio of the rectangular light beam of each luminescence unit after shaping is also 1:1.89.
In a preferred embodiment, the projection module include for input signal processing unit image to be projected and
Shaping and refractive power optical module, projection light machine and projection lens in the optical path of the uneven light issued positioned at the laser light source
Head.
Wherein, the shaping and refractive power optical module can carry out shaping and folding to the uneven light that the laser light source issues
Light forms projected light beam；The signal processing unit can receive image data image to be projected, according to described image data shape
At light machine control signal and it is transmitted to the projection light machine；The projection light machine can be believed based on the projected light beam and the control
Number projection is formed image to be projected and is projected by the camera lens.
Wherein, the shaping and refractive power optical module can carry out shaping and folding to the uneven light that the laser light source issues
Light forms projected light beam.The signal processing unit can receive image data image to be projected, according to described image data shape
At light machine control signal and it is transmitted to the projection light machine, which can be media play server parsing DCP packet simultaneously
A frame image in the video of the broadcasting of transmission.The projection light machine can be projected based on the projected light beam and the control signal
It is formed image to be projected and is projected by the camera lens.Wherein, projection light machine can be any one in DMD, LoCS or LCD
Kind.Projection light machine can control the unlatching of multiple modulated light valves thereon under the control information function that signal processing unit transmits
Angle, thus make projected light beam it is different degrees of by projection light machine, obtain projected image.
Obviously, the above embodiments of the present invention is merely examples for clearly illustrating the present invention, and
It is not limitations of the embodiments of the present invention, 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 all to belong to obvious changes or variations that the technical solution of the utility model is extended out still in the utility model
The column of protection scope.
Claims (6)
1. a kind of laser projection system, which is characterized in that including laser light source, brightness control module, current control module and throwing
Shadow module；
The laser light source includes that multiple luminescence units and respectively each luminescence unit provide the power supply unit of input current；
The brightness control module for providing the light emission luminance of each luminescence unit in laser light source, the light emission luminance with to
The gray value of each pixel is corresponding in the image data of projected image；
The current control module is used to be inputted according to the light emission luminance of each luminescence unit to each luminescence unit and correspond to
Input current so that the laser light source issue and the corresponding uneven light image to be projected；
The uneven light and described image data projection that the projection module is used to issue based on the laser light source obtain described
It is image to be projected.
2. laser projection system according to claim 1, which is characterized in that each luminescence unit includes emitting red light
Group, green emitting group and blue-light-emitting group；
Emitting red light group, green emitting group are identical with the quantity of blue-light-emitting group.
3. laser projection system according to claim 2, which is characterized in that the emitting red light group includes red laser half
Conductor, the green emitting group include green laser semiconductor, and the blue-light-emitting group includes blue laser semiconductor；Or
The emitting red light group includes blue laser semiconductor and red fluorescence powder, and the green emitting group includes blue laser half
Conductor and green emitting phosphor, the blue-light-emitting group include blue laser semiconductor and blue colour fluorescent powder.
4. laser projection system according to claim 2 or 3, which is characterized in that each emitting red light group, green emitting group
With further include the optical tunnel set gradually along luminous optical path in blue-light-emitting group, first converge light optical module and shaping optics group
Part；
Each luminescence unit includes that all emitting red light groups, green emitting group and blue-light-emitting group remittance light are formed uneven light
Second remittance light optical module.
5. laser projection system according to claim 4, which is characterized in that the aspect ratio of the uneven light and described every
The aspect ratio for the projected light after the shaping optical module shaping that a luminescence unit issues is identical.
6. laser projection system according to claim 1, which is characterized in that the projection module includes for inputting wait throw
The signal processing unit of shadow image and shaping and refractive power optics in the optical path for the uneven light that the laser light source issues
Component, projection light machine and projection lens；
The shaping carries out shaping with the uneven light that refractive power optical module is used to issue the laser light source and refractive power is formed
Projected light beam；
The signal processing unit forms ray machine control for receiving image data image to be projected, according to described image data
Signal is simultaneously transmitted to the projection light machine；
The projection light machine is used to project to be formed image to be projected and pass through institute based on the projected light beam and the control signal
State camera lens projection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821931034.2U CN209388101U (en) | 2018-11-22 | 2018-11-22 | A kind of laser projection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821931034.2U CN209388101U (en) | 2018-11-22 | 2018-11-22 | A kind of laser projection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209388101U true CN209388101U (en) | 2019-09-13 |
Family
ID=67865330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821931034.2U Active CN209388101U (en) | 2018-11-22 | 2018-11-22 | A kind of laser projection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209388101U (en) |
-
2018
- 2018-11-22 CN CN201821931034.2U patent/CN209388101U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102681320B (en) | Light supply apparatus and projector | |
| CN104851380B (en) | Quantum dot lighting engineering | |
| WO2016161934A1 (en) | Projection system and method for controlling color gamut thereof | |
| CN105334687B (en) | Optical projection system | |
| CN104898362B (en) | Light source unit having wavelength conversion member and projector | |
| CN107621746B (en) | Light emitting device and relevant projecting system | |
| CN108333857A (en) | Projection light source drive control circuit | |
| TW200843521A (en) | Multi-color primary light generation in a projection system using LEDs | |
| CN207689821U (en) | A kind of laser display light source | |
| CN104656354A (en) | Illumination system and projection apparatus | |
| CN209341161U (en) | A kind of multiple color LED illumination system | |
| CN103676424A (en) | Projection apparatus and projection method for reducing energy consumption by shortening color mixing period | |
| CN105761684B (en) | Display device and backlight control method thereof | |
| CN209388101U (en) | A kind of laser projection system | |
| CN109474812A (en) | A kind of laser projection method, laser light source and optical projection system | |
| CN213517861U (en) | Illumination optical system and miniature projector | |
| TWI522998B (en) | Image adjusting method, light source module and electronic device | |
| CN210142248U (en) | Realize blue light evenly distributed's QLED backlight module | |
| CN101655638A (en) | Liquid crystal display device | |
| CN110058481A (en) | A kind of laser drive, projection device and method | |
| CN215770461U (en) | LED banks adjustable LCD projection system | |
| CN202065814U (en) | Light emitting diode backlight source and liquid crystal display thereof | |
| CN209017197U (en) | Laser display unit based on Internet of Things splicing | |
| Lou et al. | Power optimization under brightness and communication requirements for visible light communication based on MacAdam ellipse | |
| CN103377620B (en) | Method for adjusting light emitting diodes of display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |