CN212379688U - High-brightness backlight source module based on LD (laser diode) pump fluorescent crystal - Google Patents
High-brightness backlight source module based on LD (laser diode) pump fluorescent crystal Download PDFInfo
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- CN212379688U CN212379688U CN202020461364.0U CN202020461364U CN212379688U CN 212379688 U CN212379688 U CN 212379688U CN 202020461364 U CN202020461364 U CN 202020461364U CN 212379688 U CN212379688 U CN 212379688U
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Abstract
The utility model discloses a high-brightness backlight source module based on LD pumping fluorescent crystal, which comprises a light source fixing frame, an LCD screen and a high-brightness backlight source, wherein the LCD screen is fixed at the inner front side of the light source fixing frame, one side of the LCD screen is uniformly connected with the high-brightness backlight source through a light source fixing base, the high-brightness backlight source is distributed at the rear side of the LCD screen in a matrix shape, the heat dissipation module adopts an air cooling mode to dissipate the heat of a first 450nm laser source component, a fluorescent crystal component and a second 450nm laser source component, compared with the liquid cooling heat dissipation mode, the high-brightness backlight source module based on the LD pumping fluorescent crystal has the advantages of simple structure, effectively reducing the volume of the high-brightness backlight source, and realizing convenient and high-efficiency adjustment of the backlight brightness, color temperature and light spot size of a single high-brightness backlight source, meanwhile, the splicing phenomenon during the splicing of multiple light source beams can be effectively improved through the three-dimensional allowance adjustment of the single light source module.
Description
Technical Field
The invention relates to the technical field of high-brightness backlight sources, in particular to a high-brightness backlight source module based on an LD pumping fluorescent crystal.
Background
The LCD (liquid crystal display) product adopts a non-pixel self-luminous display technology, and the display performance can be obtained only by the emission of the light source in the backlight module, and the quality of the backlight module, especially the quality of the backlight light source, directly affects the display quality of the liquid crystal panel. The traditional LCD backlight light source widely adopts LEDs (light emitting diodes), but the LED has wide spectral line width and large divergence angle, and the brightness reaching the LCD screen can only reach 200-2。
In recent years, laser light sources having good monochromaticity, good directivity, higher luminance brightness, and longer life are increasingly applied to LCD display products as backlight light sources instead of conventional LED backlight light sources. The laser light source has extremely high brightness and color gray, so that the display technology taking the light source as a core has the characteristics of wide color gamut, high color rendering index, high saturation and the like, and particularly, the 3D stereoscopic effect can be greatly enhanced in the field of stereoscopic imaging. The principle of a typical laser mixing to produce white light is: the semiconductor blue laser is adopted to excite the red fluorescent powder and the green fluorescent powder respectively to generate red fluorescent light and green fluorescent light, and then the blue light emitted by the semiconductor blue laser is utilized to form white light with the red fluorescent light and the green fluorescent light through the light combination device. Such a conventional laser backlight light source usually employs one or more wavelength conversion devices (typically, a fluorescent color wheel) and a plurality of relay lenses, and the structure is too complex, so that the volume of the light source is too large. Meanwhile, the traditional laser backlight light source generally adopts a liquid cooling heat dissipation mode, so that the cost of the product is increased.
In addition, the conventional LCD is mainly composed of a whole large-sized display screen, a single backlight device, a main board and other structures; however, the requirements for brightness, color temperature, heat dissipation, power and function adjustment of a single light source are more challenging to realize a large-sized LCD display, and the manufacturing cost is also significantly increased, which is not favorable for mass production. Patent CN110412796A proposes a backlight module with multiple LED light sources as a side-in type backlight for local light control, but the side-in type backlight has low light utilization efficiency, and needs a light guide plate, which has a great influence on the backlight quality. The direct type backlight light source does not need a light guide plate, so that the utilization rate of light is high, and the uniformity is good. Patent CN107705759A proposes a method for individually controlling a white light lattice light source under each pixel unit on an LED display screen, but only the brightness parameters of the image can be changed, and when the screen backlight is formed by splicing multiple light source beams, the quality of the image is seriously affected by the splicing seams between the light beams.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the existing defects, and provide a high-brightness backlight source module based on an LD pumping fluorescent crystal, which has a simple structure, not only effectively reduces the volume of the high-brightness backlight source, but also can realize convenient and efficient adjustment of the backlight brightness, the color temperature and the spot size of a single high-brightness backlight source, and simultaneously can effectively improve the splicing phenomenon during splicing of multiple light source beams, and can effectively solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a high luminance backlight source module based on LD pumping fluorescent crystal, includes light source mount, LCD screen and high luminance backlight source, the inside front side of light source mount is fixed with the LCD screen to one side of LCD screen is evenly connected with high luminance backlight source through light source unable adjustment base, and high luminance backlight source is the rear side of matrix form distribution at the LCD screen. The matrix-shaped high-brightness backlight light source can respectively adjust the spot size, the color temperature and the brightness of the emergent spots corresponding to different areas of the whole LCD screen, and the color temperature adjustable range of the LCD screen is 3000K-10000K. And the light spots of the LCD blocks corresponding to different light sources are effectively spliced by adjusting the three-dimensional allowance of the single light source module.
Further, high brightness backlight source includes camera lens module, laser source module, heat dissipation module, light source unable adjustment base and circuit control module, and light source unable adjustment base includes the installation base and sets up the connection shell in the installation base upper end, light source unable adjustment base's connection shell left side is equipped with the camera lens module, the laser source module sets up in the connection shell left and right sides of light source unable adjustment base, and light source unable adjustment base and camera lens module control correspond about to the switch and the adjustting of the luminance of first 450nm laser source subassembly and the second 450nm laser source subassembly of circuit control module control laser source module, and the heat dissipation module sets up in one side of laser source module.
Furthermore, the lens module comprises a light homogenizing rod, a lens group is arranged on the left side of the light homogenizing rod, and a scattering sheet is arranged on the right side of the light homogenizing rod, so that the focus of white light emitted by the laser source module is positioned in the center of the light incident surface of the scattering sheet, the scattering sheet can improve the divergence angle of the white light beam on one hand, the white light can be effectively driven into the light homogenizing rod, on the other hand, the coherence of blue laser in the incident light beam can be destroyed, and the speckle phenomenon occurring when the white light beam irradiates the LCD screen can be effectively eliminated.
Further, the laser light source module includes lens and beam splitter, and the beam splitter is located the right side of lens, and lens and beam splitter and camera lens module are located same axis, and the beam splitter is 45 degrees slopes to be placed, the below of beam splitter is equipped with first 450nm laser light source subassembly, and the right side of beam splitter is equipped with second 450nm laser light source subassembly, the top of beam splitter is equipped with the fluorescence crystal subassembly, the fluorescence crystal subassembly corresponds from top to bottom with first 450nm laser light source subassembly, can be to the wavelength conversion of light through the fluorescence crystal subassembly to this converts the blue laser of incidence into yellow green light, and the beam splitter is for passing through blue anti-yellow green lens, can be to the transmission of blue laser, reflection excitation's yellow green light.
Furthermore, the first 450nm laser light source assembly comprises a first 450nm laser light source, a first dodging module for beam shaping of blue laser is arranged on one side of the first 450nm laser light source, the first 450nm laser light source can emit blue laser beams, and then the first dodging module is used for beam shaping of the blue laser.
Furthermore, the second 450nm laser light source assembly comprises a second 450nm laser light source, a second dodging module for beam shaping of blue laser is arranged on one side of the second 450nm laser light source, the second 450nm laser light source can emit blue laser beams, and then the second dodging module is used for beam shaping of the blue laser.
Furthermore, the fluorescent crystal assembly comprises a fluorescent crystal, and the front surface of the fluorescent crystal is provided with a convex lens which is used for effectively converging the transmitted blue laser on the surface of the fluorescent crystal and collimating the reflected yellow-green light.
Furthermore, the heat dissipation module comprises a first light source heat dissipation module, a fluorescent crystal heat dissipation module and a second light source heat dissipation module, and the first light source heat dissipation module, the fluorescent crystal heat dissipation module and the second light source heat dissipation module are respectively used for heat dissipation of the surfaces of the first 450nm laser light source component, the fluorescent crystal component and the second 450nm laser light source component.
Further, first light source heat dissipation module, fluorescence crystal heat dissipation module and second light source heat dissipation module are including setting up at first 450nm laser light source subassembly, the integrated heat pipe radiator at fluorescence crystal subassembly and second 450nm laser light source subassembly back, one side of integrated heat pipe radiator is equipped with corresponding fan, can blow to integrated heat pipe radiator through the fan, with this dispel the heat to first 450nm laser light source subassembly, fluorescence crystal subassembly and second 450nm laser light source subassembly, make first 450nm laser light source subassembly, the radiating effect of fluorescence crystal subassembly and second 450nm laser light source subassembly better.
Compared with the prior art, the invention has the beneficial effects that: this high brightness backlight source module based on LD pumping fluorescent crystal has following benefit:
1. the high-brightness backlight source is arranged, the LD laser source is adopted to replace the traditional LED light source as the LCD backlight source, the high-brightness backlight source has obvious advantages in the aspects of directionality and brightness, the brightness reaching the LCD screen can reach more than 1000cd/m2, the LD laser source adopts the technology that the LD pumping fluorescent crystals generate yellow green light and then the yellow green light and blue light are coupled into white light, the yellow green light is simultaneously excited by one fluorescent crystal, and compared with the technology that multiple fluorescent powders are coated to obtain multiple single fluorescent lights through a complex mechanical structure, the volume of the high-brightness backlight source is effectively reduced on the premise of ensuring the white light effect.
2. The high-brightness backlight source is provided with the first 450nm laser light source component and the second 450nm laser light source component, the brightness is higher through the two laser light sources, the structure is simpler and more compact, the volume of the high-brightness backlight source is effectively reduced, the matrix-shaped high-brightness backlight source is adopted, the backlight brightness, the color temperature and the light spot size of the single high-brightness backlight source can be conveniently and efficiently adjusted, and meanwhile, the splicing phenomenon during splicing of multiple light source light beams can be effectively improved.
3. The heat dissipation module is arranged on the LED fluorescent lamp, and the first 450nm laser light source component, the fluorescent crystal component and the second 450nm laser light source component are dissipated through the heat dissipation module in an air cooling mode, so that compared with a liquid cooling heat dissipation mode, the LED fluorescent lamp is smaller in size and lower in cost.
Drawings
FIG. 1 is a schematic view of a high-brightness backlight module according to the present invention;
FIG. 2 is a schematic diagram of a high-brightness backlight source according to the present invention;
FIG. 3 is a schematic cross-sectional view of a high-brightness backlight source according to the present invention;
FIG. 4 is a schematic diagram of an optical path of a high-brightness backlight source according to the present invention.
In the figure: 1 high-brightness backlight source, 11 lens module, 111 lens group, 112 light-homogenizing rod, 113 scattering sheet, 12 laser source module, 121 lens, 122 fluorescent crystal component, 123 light-splitting sheet, 124 first 450nm laser source component, 125 second 450nm laser source component, 13 heat-radiating module, 132 first light source heat-radiating module, 133 fluorescent crystal heat-radiating module, 131 second light source heat-radiating module, 14 light source fixing base, 15 circuit control module, 2LCD screen, 3 light source fixing frame.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: the utility model provides a high-brightness backlight source module based on LD pumping fluorescent crystal, includes light source mount 3, LCD screen 2 and high-brightness backlight source 1, and the inside front side of light source mount 3 is fixed with LCD screen 2 to one side of LCD screen 2 is evenly connected with high-brightness backlight source 1 through light source unable adjustment base 14, and high-brightness backlight source 1 is the rear side of matrix form distribution at LCD screen 2. The matrix-shaped high-brightness backlight light source 1 can respectively correspond the spot size, the color temperature and the brightness adjustment of different areas of the whole LCD screen 2 to the emergent spots, the adjustable range of the color temperature of the LCD screen 2 is 3000K-10000K, and the splicing phenomenon during the splicing of multiple light source light beams can be effectively improved through the three-dimensional allowance adjustment of the matrix-shaped high-brightness backlight light source 1.
High luminance backlight source 1 includes camera lens module 11, laser light source module 12, heat dissipation module 13, light source unable adjustment base 14 and circuit control module 15, and light source unable adjustment base 14 is including installation base and the connection shell of setting in the installation base upper end, the inside left side of the connection shell of light source unable adjustment base 14 is equipped with camera lens module 11, laser light source module 12 sets up the inside left and right sides at light source unable adjustment base 14's connection shell to circuit control module 15 controls the switch and the adjustting of the lighteness of first 450nm laser lamp-shade subassembly 124 and second 450nm laser lamp-shade subassembly 125 of laser light source module 12, and heat dissipation module 13 sets up the one side at laser light source module 12.
The lens module 11 includes a light homogenizing rod 112, a lens group 111 is disposed on the left side of the light homogenizing rod 112, and a diffuser 113 is disposed on the right side of the light homogenizing rod 112, so that the focus of the white light emitted by the laser source module 12 is located at the center of the light incident surface of the diffuser 113, the diffuser 113 can improve the divergence angle of the white light beam, and the white light beam can be effectively incident into the light homogenizing rod 112, and the coherence of the blue laser in the incident light beam can be destroyed, and the speckle phenomenon when the white light beam irradiates the LCD screen can be effectively eliminated.
The laser light source module 12 comprises a lens 121 and a light splitting sheet 123, the light splitting sheet 123 is located on the right side of the lens 121, the light splitting sheet 123 and the lens module 11 are located on the same axis, the light splitting sheet 123 is obliquely placed at an angle of 45 degrees, a first 450nm laser light source component 124 is arranged below the light splitting sheet 123, a second 450nm laser light source component 125 is arranged on the right side of the light splitting sheet 123, a fluorescent crystal component 122 is arranged above the light splitting sheet 123, the fluorescent crystal component 122 vertically corresponds to the first 450nm laser light source component 124, wavelength conversion of light can be achieved through the fluorescent crystal component 122, incident blue laser light is converted into yellow green light, the light splitting sheet 123 is a blue-transparent anti-yellow-green lens, transmission of blue laser light can be achieved, and excited yellow green light is reflected.
The first 450nm laser light source assembly 124 comprises a first 450nm laser light source, a first dodging module for beam shaping of blue laser is arranged on one side of the first 450nm laser light source, the first 450nm laser light source can emit blue laser beams, and then the first dodging module is used for beam shaping of the blue laser.
The second 450nm laser light source assembly 125 comprises a second 450nm laser light source, a second light homogenizing module for beam shaping of blue laser is arranged on one side of the second 450nm laser light source, blue laser beams can be emitted through the second 450nm laser light source, then beam shaping of the blue laser is carried out through the second light homogenizing module, and the second 450nm laser light source and the first 450nm laser light source both adopt 1 450nm blue laser diode or a plurality of 450nm blue laser diode arrays.
The fluorescent crystal assembly 122 includes a fluorescent crystal, and the front surface of the fluorescent crystal is provided with a convex lens for effectively converging the transmitted blue laser on the surface of the fluorescent crystal and collimating the reflected yellow-green light.
The heat dissipation module 13 is composed of a first light source heat dissipation module 132, a fluorescent crystal heat dissipation module 133, and a second light source heat dissipation module 131, and the first light source heat dissipation module 132, the fluorescent crystal heat dissipation module 133, and the second light source heat dissipation module 131 are respectively used for heat dissipation of the surfaces of the first 450nm laser light source assembly 124, the fluorescent crystal assembly 122, and the second 450nm laser light source assembly 125.
First light source thermal module 132, fluorescence crystal thermal module 133 and second light source thermal module 131 are including setting up at first 450nm laser light source subassembly 124, the integrated heat pipe radiator at fluorescence crystal subassembly 122 and the second 450nm laser light source subassembly 125 back, one side of integrated heat pipe radiator is equipped with corresponding fan, can blow to integrated heat pipe radiator through the fan, with this to first 450nm laser light source subassembly 124, fluorescence crystal subassembly 122 and second 450nm laser light source subassembly 125 dispel the heat, make first 450nm laser light source subassembly 124, the radiating effect of fluorescence crystal subassembly 122 and second 450nm laser light source subassembly 125 better.
When in use: the high-brightness backlight source 1 can realize convenient and efficient adjustment of backlight brightness, color temperature and spot size of a single high-brightness backlight source, and can effectively improve the splicing phenomenon during splicing of multiple light source beams, when the high-brightness backlight source 1 works, the circuit control module 15 is used for controlling the on-off and brightness adjustment of the first 450nm laser light source component 124 and the second 450nm laser light source component 125, the first 450nm laser light source and the second 450nm laser light source of the first 450nm laser light source component 124 and the second 450nm laser light source component 125 are used for emitting blue light, and then the first dodging module and the second dodging module are used for respectively shaping blue laser light emitted by the first 450nm laser light source and the second 450nm laser light source to obtain homogenized light beam energy. The homogenized blue light is then injected into the fluorescent crystal assembly 122, so that a better fluorescence excitation efficiency can be obtained. The blue laser incident from the first 450nm laser source can be converted into yellow-green light by the wavelength conversion of the light by the fluorescent crystal of the fluorescent crystal assembly 122, the blue laser transmitted through the beam splitter 123 is converged by the convex lens of the fluorescent crystal assembly 122, the reflected yellow-green light is collimated, the yellow-green light excited by the fluorescent crystal 10 is reflected by the beam splitter 123, the yellow-green light reflected by the beam splitter and the blue laser transmitted by the beam splitter are coupled by the focusing lens 121 to generate white light, the white light is converged on the diffuser 113 of the lens module 11, the divergence angle of the white light beam can be improved by the diffuser 113 on one hand, so that the white light is effectively injected into the light homogenizing rod 112, on the other hand, the coherence of the blue laser in the incident light beam can be destroyed, the speckle phenomenon when the white light beam irradiates the LCD screen can be effectively eliminated, and the multi-stage shaping of the light homogenizing rod 112 and, the white light energy emitted by the laser light source module 12 is distributed more uniformly, the shaped white light is rectangular, the subsequent adjustment of the backlight light source array in the projection of the LCD screen 2 is facilitated, and the light spots of the LCD blocks corresponding to different light sources are effectively spliced by adjusting the three-dimensional allowance of the single light source module.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides a high brightness backlight source module based on LD pumping fluorescent crystal which characterized in that: the LED backlight module comprises a light source fixing frame (3), an LCD screen (2) and a high-brightness backlight source (1), wherein the LCD screen (2) is fixed on the front side of the inside of the light source fixing frame (3), one side of the LCD screen (2) is uniformly connected with the high-brightness backlight source (1) through a light source fixing base (14), the high-brightness backlight source (1) is distributed on the rear side of the LCD screen (2) in a matrix shape, emergent light spots can correspond to the spot sizes and the color temperatures and the brightness adjustment of different areas of the whole LCD screen (2) respectively through the matrix-shaped high-brightness backlight source (1), the color temperature adjustable range of the LCD screen (2) is 3000K-10000K, and the effective splicing of the light spots of different light sources corresponding to LCD areas is realized through the three-dimensional allowance adjustment of a single light source module.
2. The high-brightness backlight source module based on the LD pumped fluorescent crystal as claimed in claim 1, wherein: high luminance backlight source (1) includes camera lens module (11), laser light source module (12), heat dissipation module (13), light source unable adjustment base (14) and circuit control module (15), and light source unable adjustment base (14) are including installation base and the connection shell of setting in the installation base upper end, the inside left side of connection shell of light source unable adjustment base (14) is equipped with camera lens module (11), laser light source module (12) set up the inside left and right sides in the connection shell of light source unable adjustment base (14) to the switch and the adjustting of the lighteness of first 450nm laser light source subassembly (124) and second 450nm laser light source subassembly (125) of circuit control module (15) control laser light source module (12), and heat dissipation module (13) set up the one side at laser light source module (12).
3. The high-brightness backlight source module based on the LD pumped fluorescent crystal as claimed in claim 2, wherein: the lens module (11) comprises a light homogenizing rod (112), a lens group (111) is arranged on the left side of the light homogenizing rod (112), a scattering sheet (113) is arranged on the right side of the light homogenizing rod (112), so that the focus of white light emitted by the laser light source module (12) is located in the center of the light incident surface of the scattering sheet (113), the scattering sheet (113) can improve the divergence angle of white light beams on one hand, the white light is effectively incident into the light homogenizing rod (112), on the other hand, the coherence of blue laser in incident light beams can be destroyed, and the speckle phenomenon occurring when the white light beams irradiate an LCD screen can be effectively eliminated.
4. The high-brightness backlight source module based on the LD pumped fluorescent crystal as claimed in claim 2, wherein: the laser light source module (12) comprises a lens (121) and a light splitting sheet (123), the light splitting sheet (123) is located on the right side of the lens (121), the light splitting sheet (123) and the lens module (11) are located on the same axis, the light splitting sheet (123) is obliquely placed at an angle of 45 degrees, a first 450nm laser light source component (124) is arranged below the light splitting sheet (123), a second 450nm laser light source component (125) is arranged on the right side of the light splitting sheet (123), a fluorescent crystal component (122) is arranged above the light splitting sheet (123), the fluorescent crystal component (122) vertically corresponds to the first 450nm laser light source component (124), the wavelength of light can be converted through the fluorescent crystal component (122), incident blue laser light is converted into yellowish green light, the light splitting sheet (123) is a blue-transmitting and yellowish green-reflecting lens and can transmit the blue laser light, the excited yellow-green light is reflected.
5. The high-brightness backlight source module based on the LD pumped fluorescent crystal as claimed in claim 4, wherein: the first 450nm laser light source assembly (124) comprises a first 450nm laser light source, and a first dodging module for performing beam shaping on blue laser is arranged on one side of the first 450nm laser light source.
6. The high-brightness backlight source module based on the LD pumped fluorescent crystal as claimed in claim 4, wherein: the second 450nm laser light source assembly (125) comprises a second 450nm laser light source, and a second dodging module for performing beam shaping on blue laser is arranged on one side of the second 450nm laser light source.
7. The high-brightness backlight source module based on the LD pumped fluorescent crystal as claimed in claim 4, wherein: the fluorescent crystal assembly (122) comprises a fluorescent crystal, and the front surface of the fluorescent crystal is provided with a convex lens which is used for effectively converging the transmitted blue laser on the surface of the fluorescent crystal and collimating the reflected yellow-green light.
8. The high-brightness backlight source module based on the LD pumped fluorescent crystal as claimed in claim 2, wherein: the heat dissipation module (13) is composed of a first light source heat dissipation module (132), a fluorescent crystal heat dissipation module (133) and a second light source heat dissipation module (131), and the first light source heat dissipation module (132), the fluorescent crystal heat dissipation module (133) and the second light source heat dissipation module (131) are respectively used for heat dissipation of the surfaces of the first 450nm laser light source component (124), the fluorescent crystal component (122) and the second 450nm laser light source component (125).
9. The high-brightness backlight source module based on the LD pumped fluorescent crystal as claimed in claim 8, wherein: the first light source heat dissipation module (132), the fluorescent crystal heat dissipation module (133) and the second light source heat dissipation module (131) comprise integrated heat pipe radiators arranged on the back sides of the first 450nm laser light source component (124), the fluorescent crystal component (122) and the second 450nm laser light source component (125), and corresponding fans are arranged on one sides of the integrated heat pipe radiators.
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