WO2012142877A1 - Optical wavelength conversion wheel component with brightness enhancement film, and optical source - Google Patents

Optical wavelength conversion wheel component with brightness enhancement film, and optical source Download PDF

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Publication number
WO2012142877A1
WO2012142877A1 PCT/CN2012/071793 CN2012071793W WO2012142877A1 WO 2012142877 A1 WO2012142877 A1 WO 2012142877A1 CN 2012071793 W CN2012071793 W CN 2012071793W WO 2012142877 A1 WO2012142877 A1 WO 2012142877A1
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WO
WIPO (PCT)
Prior art keywords
wavelength conversion
light
brightness enhancement
enhancement film
conversion wheel
Prior art date
Application number
PCT/CN2012/071793
Other languages
French (fr)
Chinese (zh)
Inventor
杨毅
李屹
Original Assignee
深圳市绎立锐光科技开发有限公司
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Publication of WO2012142877A1 publication Critical patent/WO2012142877A1/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133617—Illumination with ultraviolet light; Luminescent elements or materials associated to the cell
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • G02F1/133507—Films for enhancing the luminance
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence

Definitions

  • the present invention relates to optical devices for controlling the color or direction of light.
  • Liquid crystals themselves do not emit light but can be controlled to change the light transmission characteristics, thereby being continuously applied in the field of display.
  • the backlight used to provide the projected light in combination with the liquid crystal display panel is driven by the market, and continues to develop in a thin and bright direction.
  • 1 shows a typical liquid crystal backlight structure:
  • the bottom of the light guide plate 14 has a reflecting surface 19, and the light emitted by the side light source 18 is guided through the light guiding plate 14 to the liquid crystal panel 20; the brightness enhancement film 10 covers the light guiding plate 14.
  • the brightness enhancement film (BEF) 10 was first disclosed in U.S. Patent No. 4,906,070 to 3M Company. This patent clearly indicates the structure of the brightness enhancement film, as shown in Fig. 1 including a smooth side contacting the light exit surface and an array of prism lines arranged in parallel on the other side.
  • 98804889 and 97192045 disclose an improved structure of the brightness enhancement film 10 described above, one in which an astigmatism layer is added to the original structure, and the other is to adjust the angle of the prism in the original structure.
  • a light wavelength conversion material such as, but not limited to, a phosphor, based on a conventional backlight, is used to generate a backlight having a predetermined color based on light wavelength conversion. Its low cost, high performance and more popular with the market.
  • the brightness enhancement film 10 can also be used to brighten such a backlight.
  • the specific structure is shown in FIG. 2.
  • the excitation light from the excitation light source passes through the filter film 1 and is irradiated onto the phosphor 2, and the phosphor 2 is irradiated.
  • the large-angle excited light (such as R1) is converted into a small angle light by the brightness enhancement film 10 to be emitted, and the small angle excited light (such as R4) is reflected by the brightness enhancement film 10 and then scattered by the phosphor into a large angle to emit light.
  • the brightness enhancement film 10 further increases the total amount of light emitted by the phosphor at a small angle by the excitation light.
  • the filter 1 preferably has a reflection effect on the excited light, thereby reflecting the excited light directed away from the brightness enhancement film 10 to further increase the light exiting brightness of the light source.
  • the above prior art is disadvantageous in that the brightness enhancement film 10 can only be brightened in a direction perpendicular to the stretching direction of a single prism due to the linear arrangement of the prisms, and the brightness enhancement effect cannot be provided along the extending direction of the prism. And with the light
  • the solution adopted by the device to avoid deterioration of the performance of the light source caused by failure of the long-term illumination of the light wavelength conversion material.
  • the brightness enhancement film 10 is not suitable.
  • FIG. 3a and FIG. 3b a plurality of horizontal lines are used to indicate the prisms or prism groups arranged in parallel, black and long.
  • the square is used to indicate the spot of the excitation light, and it is assumed that when the color wheel with the phosphor has the brightness enhancement film as shown in FIG. 3, when the color wheel carries the brightness enhancement film, it rotates to the position shown in FIG.
  • the technical problem to be solved by the present invention is to address the deficiencies of the prior art described above, and to provide a light wavelength conversion wheel assembly and a light source with a brightness enhancement film, which can be applied to a high power light source based on optical wavelength conversion. Stable brightening.
  • One of the technical solutions proposed to solve the above technical problems is to provide a light wavelength conversion wheel assembly comprising a light wavelength conversion wheel carrying one or more light wavelength conversion materials, and a motor for driving the light wavelength conversion wheel to rotate And a bracket for fixing the motor; further comprising a brightness enhancement film, in particular, the brightness enhancement film is fixed on the holder, the smooth surface of the brightness enhancement film is adjacent to the light wavelength conversion wheel and is close to the light wavelength conversion material .
  • the brightness enhancement film completely covers the excitation spot projected on the light wavelength conversion wheel assembly, and the area is much smaller than the distribution area of the light wavelength conversion material.
  • the bracket includes a first bracket and a second bracket fastened together by a fastening device for respectively fixing the brightness enhancement film and the motor.
  • the second bracket is further provided with a hole position, a slot or a positioning frame for fixing the excitation light source.
  • a second technical solution proposed to solve the above technical problem is to provide a light source including an excitation light source and a light wavelength conversion wheel assembly; the light wavelength conversion wheel assembly includes a light wavelength carrying one or more light wavelength conversion materials a conversion wheel and a motor for driving the rotation of the light wavelength conversion wheel; further comprising a brightness enhancement film, in particular, the excitation light source Generating excitation light for exciting the light wavelength conversion material; the smooth surface of the brightness enhancement film is adjacent to the light wavelength conversion wheel and close to the light wavelength conversion material; and the projection light of the excitation light source and the brightness enhancement film are separated from the light
  • the wavelength conversion wheel is opposite; the outer cover or the fixing frame of the light source simultaneously fixes the excitation light source, the light wavelength conversion wheel assembly and the brightness enhancement film, so that when the light source emits light, the light wavelength conversion wheel is driven relative to the brightness under the driving of the motor Enhancement of the film and excitation of the light source.
  • the smooth surface of the brightness enhancement film is plated with a filter layer for reflecting the excitation light and transmitting the excitation light.
  • FIG. 1 is a diagram showing an application structure of a conventional brightness enhancement film on a liquid crystal display device
  • FIG. 2 illustrates the application of a conventional brightness enhancement film on a light source based on light wavelength conversion
  • FIG. 3 illustrates the use effect of the existing brightness enhancement film as the wheel rotates, wherein FIGS. 3a and 3b represent two positions, respectively. On the situation;
  • Figure 4 is a schematic view showing the structure of the optical wavelength conversion wheel assembly of the present invention
  • Figure 5 is a rear and bottom view of the structure of Figure 4;
  • the optical wavelength conversion wheel assembly of the present invention comprises a light wavelength conversion wheel 3 carrying one or more light wavelength conversion materials, a motor 6 connecting and driving the rotation of the light wavelength conversion wheel 3, and a fixed motor.
  • a holder 5 of 6 further comprising a brightness enhancement film 4 fixed to the holder 5, the smooth surface of the brightness enhancement film 5 being in close proximity to the light wavelength conversion wheel 3 and being close to the light wavelength conversion material .
  • the brightness enhancement film is spatially separated from the light wavelength conversion wheel, and the brightness enhancement film does not rotate with the light wavelength conversion wheel, so that the brightness angle of the spot finally obtained after the brightness of the light wavelength conversion wheel is enhanced by the film No change occurs, and the effect of brightness enhancement is reflected.
  • the light wavelength conversion material comprises a phosphor, a nano material or a luminescent dye, which may be bonded together by one or more transparent materials, so that the light source has stable light-emitting characteristics.
  • the transparent material may be a transparent colloid or a transparent glass material, mixed or lysed with the phosphor; or may be a transparent plastic film material, and the phosphor is hot pressed onto the transparent plastic film material.
  • the phosphor can also be held with any of the transparent materials mentioned above, and can be further sealed.
  • the light wavelength conversion material is preferably distributed in a sheet form. Further, in order to increase the light absorption rate of the light wavelength conversion material, scattering particles such as, but not limited to, titanium oxide particles or alumina particles may be mixed in the light wavelength conversion material.
  • the optical wavelength conversion wheel 3 used in the present invention preferably includes a spectroscopic filter for transmitting the excitation light and reflecting the excited light, which is not described herein because it is a prior art.
  • the light wavelength conversion material is generally distributed in a ring shape on the light wavelength conversion wheel 3.
  • the area of the brightness enhancement film 4 corresponds to the area of the excitation spot projected on the light wavelength conversion wheel assembly, which is much smaller than the distribution area of the light wavelength conversion material, and it is preferable that the brightness enhancement film 4 completely covers the excitation light spot.
  • the distance between the brightness enhancement film 4 and the light wavelength conversion wheel 3 is controlled to be less than 0.6 mm.
  • the present invention may further include a filter disposed between the light wavelength conversion material and the brightness enhancement film 4 for reflecting the excitation light and transmitting the excited light to improve the color purity of the light emitted by the light source.
  • the excitation light transmitted through the light wavelength conversion material and not absorbed is reflected back to the light wavelength conversion material for reuse to improve the light conversion efficiency.
  • the filter may be fixed to the optical wavelength conversion wheel 3 by flattening the light wavelength conversion material; however, in order to save material cost, the filter is preferably attached to the bracket 5 with the brightness enhancement film 4 attached thereto.
  • a second filter for transmitting the excitation light and reflecting the excited light is disposed between the excitation light projected by the excitation light source and the light wavelength conversion wheel 3 for reflecting the direction of the incident excitation light.
  • the emitted excited light to the opposite direction will be more conducive to increasing the light exiting brightness of the light source.
  • the second filter can be fixed to the brightness enhancement film 4 via the light wavelength conversion wheel 3 while saving the cost by reducing the area of the second filter substantially in agreement with the brightness enhancement film 4.
  • Figures 5 and 6 illustrate in more detail the construction of a preferred embodiment of the optical wavelength conversion wheel assembly of the present invention.
  • the bracket 5 includes a first bracket 51 and a second bracket 52 that are fastened together by fastening means.
  • the first bracket 51 is used to fix the brightness enhancement film 4
  • the second bracket 52 is used to fix the motor 6, such as but not limited to the screw 63.
  • the first bracket 51 and the second bracket 52 are fixed, for example but not limited to, by fastening screws 53.
  • at least a through hole is formed on the second bracket 52 at a position opposite to the brightness enhancement film 4 via the light wavelength conversion wheel 3, and FIGS. 4 and 6 illustrate the second bracket 52.
  • the hollow structure is equivalent to replacing the through hole.
  • the optical wavelength conversion wheel assembly of the present invention may further be provided with a hole position, a slot or a positioning frame for fixing the excitation light source on the second bracket 52, the position of the hole position, the slot position or the positioning frame or
  • the form depends on the type and size of the excitation light source, and any hole position shown is not uniquely limited.
  • the present invention also separately provides a light source including an excitation light source and an optical wavelength conversion wheel assembly for generating excitation light for exciting a wavelength conversion material of light;
  • the optical wavelength conversion wheel assembly includes a carrier a light wavelength conversion wheel 3 of one or more light wavelength conversion materials and a motor 6 that drives the rotation of the light wavelength conversion wheel; further comprising a brightness enhancement film, the smooth surface of the brightness enhancement film being adjacent to the light wavelength conversion wheel 3 and The light wavelength conversion material is close to each other; the projection light of the excitation light source is opposite to the brightness enhancement film by the light wavelength conversion wheel; the outer cover or the fixing frame of the light source simultaneously fixes the excitation light source, the light wavelength conversion wheel assembly and the brightness enhancement film, so that When the light source emits light, the light wavelength conversion wheel is driven by the motor 6 in rotation relative to the brightness enhancement film and the excitation light source.
  • the outer cover or the fixing frame of the light source is completely realized by the bracket 5 in the optical wavelength conversion wheel assembly of the present invention, that is, the excitation light source is also fixed at the proper position of the bracket 5, the light source of the present invention and the utility model
  • the structure of the optical wavelength conversion wheel assembly is substantially the same.
  • the significance of the light source of the present invention is that existing optical wavelength conversion wheel assemblies can be used without the need to order new optical wavelength conversion wheel assemblies.
  • the area of the brightness enhancement film may also be equivalent to the spot area of the projection light of the excitation light source, which is much smaller than the distribution area of the light wavelength conversion material, and preferably completely covers the projection light. Spot. 6 ⁇
  • the brightness enhancement film and the light wavelength conversion wheel 3 distance is less than 0.
  • a smoothing layer may also be plated on the smooth surface of the brightness enhancement film for reflecting the excitation light and transmitting the excited light.
  • the excitation source can be a solid state light emitting device such as, but not limited to, an LED that emits UV light or a laser device.

Abstract

An optical wavelength conversion wheel component with a brightness enhancement film, and an optical source including the same. The optical wavelength conversion wheel component with a brightness enhancement film includes an optical wavelength conversion wheel (3) having one or more than one optical wavelength conversion material, a motor (6) driving the optical wavelength conversion wheel (3) to rotate, a support (5) fixing the motor (6), and a brightness enhancement film (4). The brightness enhancement film (4) is fixed on the support (5), and the smooth surface of the brightness enhancement film (4) is immediately adjacent to the optical wavelength conversion wheel (3) and close to the optical wavelength conversion material. The brightness enhancement film (4) of the optical wavelength conversion wheel component does not rotate with the optical wavelength conversion wheel (3), the finally obtained light spot lighting angle will not change, and it has the advantage of easy implementation and low cost.

Description

技术领域 本实用新型涉及用来控制光的颜色或方向的光学装置。 TECHNICAL FIELD The present invention relates to optical devices for controlling the color or direction of light.
背景技术 液晶本身不发光却可受控改变光的穿透特性，从而在显示领域不断得以应用。 与液晶显示板相配套用来提供投射光的背光源则在巿场的驱动下， 不断往薄、 亮的方向发 展。 图 1示意了一种典型的液晶背光源结构： 光导板 14底部具有反射面 19 , 由侧光源 18 发出的光经光导板 14导射往液晶屏 20; 亮度增强膜 10覆盖在光导板 14的光出射面上， 可 以将大角度出射光（如光线 R1 )转换成小角度光进行出射， 并将小角度光（如光线 R4 )返 回通过反射或散射改变出射角度后再利用， 从而提高液晶屏正视方向的光亮度。 所述亮度增强膜（BEF, brightness enhancement film ) 10最早公开于美国 3M公司的美 国专利 US4,906,070。 该专利明确指出亮度增强膜的结构， 如图 1包括一接触光出射面的平 滑侧及位于另一侧的由棱镜线形平行排列而成的阵列。专利号分别为 98804889和 97192045 的中国专利则公开了上述亮度增强膜 10的改进结构， 一个是在原结构上增加了散光层， 一 个是调整了原结构中的棱镜的角度。 随着 LED (发光二极管）技术及光源技术的发展， 在传统背光源的基础上增加光波长转 换材料， 例如但不限于荧光粉， 基于光波长转换来产生具有预定颜色的出射光的背光源因 其成本低、 性能高效而更受巿场的青睐。 所述亮度增强膜 10同样可用来对此类背光源进行 增亮， 具体结构如图 2所示： 来自激发光源的激发光穿过滤光片 1照射到荧光粉 2上， 来 自荧光粉 2的大角度受激发光（如 R1 )经亮度增强膜 10转换成小角度光进行出射， 小角度 受激发光（如 R4 )则被亮度增强膜 10反射再经荧光粉散射成大角度出射光穿过亮度增强膜 10, 进而提高了荧光粉受激发光在小角度的出射光总量。 滤光片 1 最好选择对受激发光具 有反射作用， 从而反射背向亮度增强膜 10的受激发光以进一步提高光源的光出射亮度。 上述现有技术的不足之处在于： 由于棱镜的线形排列， 所述亮度增强膜 10只能在垂直 于单个棱镜的伸展方向进行增亮， 而沿着棱镜的伸展方向则无法提供增亮效果。 而随着光 源技术往大功率方向的不断发展， 为了延长使用寿命， 现有基于光波长转换的光源往往使 光波长转换材料相对于激发光束进行转动， 例如但不限于美国专利 US7 , 547 , 114 公开的照 明装置所釆用的方案， 以避免因光波长转换材料长时间光照而失效导致的光源性能变劣。 对此类基于相对运动的新型光源来说， 所述亮度增强膜 10并不适用， 具体分析可参考图 3a 及图 3b , 用多条横线来示意平行排列的各个棱镜或棱镜组， 黑长方块来表示激发光的光斑， 则假设带荧光粉的色轮上带有如图 3 所示的亮度增强膜时， 当色轮携带亮度增强膜转动到 如图 3a所示的位置（棱镜走向与参照线 A垂直） 时， 按照上述增亮原则， 受激发光的分布 应该沿水平方向 （光斑长边方向） 180度全角发光， 沿竖直方向 （光斑短边方向）增亮， 发 散全角小于 180度； 而当色轮携带亮度增强膜转动到如图 3b所示的位置（棱镜走向与参照 线 A平行） 时， 受激发光的分布则刚好与图 3a情形相反。 因此， 随着色轮转动， 光源出射 光的光分布将处于不断变化中。 对于一特定的投影机系统或液晶显示装置而言， 是无法使 用这种光分布处于不断变化中的光源的。 BACKGROUND OF THE INVENTION Liquid crystals themselves do not emit light but can be controlled to change the light transmission characteristics, thereby being continuously applied in the field of display. The backlight used to provide the projected light in combination with the liquid crystal display panel is driven by the market, and continues to develop in a thin and bright direction. 1 shows a typical liquid crystal backlight structure: The bottom of the light guide plate 14 has a reflecting surface 19, and the light emitted by the side light source 18 is guided through the light guiding plate 14 to the liquid crystal panel 20; the brightness enhancement film 10 covers the light guiding plate 14. On the light exit surface, large-angle outgoing light (such as light R1) can be converted into small-angle light to be emitted, and small-angle light (such as light R4) can be returned to reflect the exit angle by reflection or scattering, and then used, thereby improving the liquid crystal screen. The brightness of the direction of the front view. The brightness enhancement film (BEF) 10 was first disclosed in U.S. Patent No. 4,906,070 to 3M Company. This patent clearly indicates the structure of the brightness enhancement film, as shown in Fig. 1 including a smooth side contacting the light exit surface and an array of prism lines arranged in parallel on the other side. The Chinese patents of the patents No. 98804889 and 97192045 disclose an improved structure of the brightness enhancement film 10 described above, one in which an astigmatism layer is added to the original structure, and the other is to adjust the angle of the prism in the original structure. With the development of LED (Light Emitting Diode) technology and light source technology, a light wavelength conversion material, such as, but not limited to, a phosphor, based on a conventional backlight, is used to generate a backlight having a predetermined color based on light wavelength conversion. Its low cost, high performance and more popular with the market. The brightness enhancement film 10 can also be used to brighten such a backlight. The specific structure is shown in FIG. 2. The excitation light from the excitation light source passes through the filter film 1 and is irradiated onto the phosphor 2, and the phosphor 2 is irradiated. The large-angle excited light (such as R1) is converted into a small angle light by the brightness enhancement film 10 to be emitted, and the small angle excited light (such as R4) is reflected by the brightness enhancement film 10 and then scattered by the phosphor into a large angle to emit light. The brightness enhancement film 10 further increases the total amount of light emitted by the phosphor at a small angle by the excitation light. The filter 1 preferably has a reflection effect on the excited light, thereby reflecting the excited light directed away from the brightness enhancement film 10 to further increase the light exiting brightness of the light source. The above prior art is disadvantageous in that the brightness enhancement film 10 can only be brightened in a direction perpendicular to the stretching direction of a single prism due to the linear arrangement of the prisms, and the brightness enhancement effect cannot be provided along the extending direction of the prism. And with the light The development of source technology in the direction of high power, in order to prolong the service life, existing light source based on wavelength conversion of light often rotates the wavelength conversion material relative to the excitation beam, such as, but not limited to, the illumination disclosed in US Pat. No. 7,547,114. The solution adopted by the device to avoid deterioration of the performance of the light source caused by failure of the long-term illumination of the light wavelength conversion material. For such a new type of light source based on relative motion, the brightness enhancement film 10 is not suitable. For specific analysis, reference may be made to FIG. 3a and FIG. 3b, and a plurality of horizontal lines are used to indicate the prisms or prism groups arranged in parallel, black and long. The square is used to indicate the spot of the excitation light, and it is assumed that when the color wheel with the phosphor has the brightness enhancement film as shown in FIG. 3, when the color wheel carries the brightness enhancement film, it rotates to the position shown in FIG. 3a (prism strike and reference) When line A is vertical), according to the above-mentioned brightening principle, the distribution of the excited light should be illuminated at a full angle of 180 degrees in the horizontal direction (longitudinal direction of the spot), brightened in the vertical direction (short side of the spot), and the divergence full angle is less than 180 degrees. When the color wheel carrying the brightness enhancement film is rotated to the position shown in Fig. 3b (the prism direction is parallel to the reference line A), the distribution of the excited light is just opposite to the case of Fig. 3a. Therefore, as the color wheel rotates, the light distribution of the light exiting the light source will be constantly changing. For a particular projector system or liquid crystal display device, it is not possible to use such a light source whose light distribution is constantly changing.
发明内容 本实用新型要解决的技术问题是针对上述现有技术的不足之处， 而提出一种 带亮度增强膜的光波长转换轮组件和光源， 使可适用于基于光波长转换的大功率光源的稳 定增亮。 为解决上述技术问题而提出的技术方案之一是， 提供一种光波长转换轮组件， 包括承 载有一种或一种以上光波长转换材料的光波长转换轮， 驱动该光波长转换轮转动的马达， 及固定马达的支架； 还包括亮度增强膜,尤其是， 该亮度增强膜被固定在所述支架上， 该亮 度增强膜的平滑面紧邻所述光波长转换轮并与光波长转换材料相贴近。 SUMMARY OF THE INVENTION The technical problem to be solved by the present invention is to address the deficiencies of the prior art described above, and to provide a light wavelength conversion wheel assembly and a light source with a brightness enhancement film, which can be applied to a high power light source based on optical wavelength conversion. Stable brightening. One of the technical solutions proposed to solve the above technical problems is to provide a light wavelength conversion wheel assembly comprising a light wavelength conversion wheel carrying one or more light wavelength conversion materials, and a motor for driving the light wavelength conversion wheel to rotate And a bracket for fixing the motor; further comprising a brightness enhancement film, in particular, the brightness enhancement film is fixed on the holder, the smooth surface of the brightness enhancement film is adjacent to the light wavelength conversion wheel and is close to the light wavelength conversion material .
上述方案中， 所述亮度增强膜完全覆盖投射在该光波长转换轮组件上的激发光斑， 面 积远小于所述光波长转换材料的分布面积。 所述支架包括通过紧固装置紧固在一起的第一 支架和第二支架， 分别用来固定所述亮度增强膜和马达。 所述第二支架上还设有用来固定 激发光源的孔位、 槽位或定位架。  In the above solution, the brightness enhancement film completely covers the excitation spot projected on the light wavelength conversion wheel assembly, and the area is much smaller than the distribution area of the light wavelength conversion material. The bracket includes a first bracket and a second bracket fastened together by a fastening device for respectively fixing the brightness enhancement film and the motor. The second bracket is further provided with a hole position, a slot or a positioning frame for fixing the excitation light source.
上述方案中， 所述亮度增强膜与光波长转换轮的距离小于 0. 6亳米。 为解决上述技术问题而提出的技术方案之二是， 提供一种光源， 包括激发光源和光波 长转换轮组件； 所述光波长转换轮组件包括承载有一种或一种以上光波长转换材料的光波 长转换轮和驱动该光波长转换轮转动的马达； 还包括亮度增强膜， 尤其是， 所述激发光源 产生用于激发光波长转换材料的激发光； 所述亮度增强膜的平滑面紧邻所述光波长转换轮 并与光波长转换材料相贴近； 激发光源的投射光与所述亮度增强膜隔着光波长转换轮相对; 光源的外罩或固定架同时固定所述激发光源、 光波长转换轮组件和亮度增强膜， 使得光源 发光时， 所述光波长转换轮在马达的驱动下处于相对于所述亮度增强膜和激发光源的转动 中。 亳米。 The distance between the brightness enhancement film and the light wavelength conversion wheel is less than 0. 6 亳 meters. A second technical solution proposed to solve the above technical problem is to provide a light source including an excitation light source and a light wavelength conversion wheel assembly; the light wavelength conversion wheel assembly includes a light wavelength carrying one or more light wavelength conversion materials a conversion wheel and a motor for driving the rotation of the light wavelength conversion wheel; further comprising a brightness enhancement film, in particular, the excitation light source Generating excitation light for exciting the light wavelength conversion material; the smooth surface of the brightness enhancement film is adjacent to the light wavelength conversion wheel and close to the light wavelength conversion material; and the projection light of the excitation light source and the brightness enhancement film are separated from the light The wavelength conversion wheel is opposite; the outer cover or the fixing frame of the light source simultaneously fixes the excitation light source, the light wavelength conversion wheel assembly and the brightness enhancement film, so that when the light source emits light, the light wavelength conversion wheel is driven relative to the brightness under the driving of the motor Enhancement of the film and excitation of the light source.
上述方案中， 在所述亮度增强膜的平滑面上鍍有滤光膜层， 用来反射激发光及透射受 激发光。 釆用上述各技术方案， 具有易于实现、 低成本及其所带来的性价比高之优点。  In the above aspect, the smooth surface of the brightness enhancement film is plated with a filter layer for reflecting the excitation light and transmitting the excitation light. The above various technical solutions have the advantages of being easy to implement, low cost, and cost-effective.
附图说明 图 1示意了现有亮度增强膜在液晶显示装置上的应用结构； BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing an application structure of a conventional brightness enhancement film on a liquid crystal display device;
图 2示意了现有亮度增强膜在基于光波长转换的光源上的应用； 图 3示意了现有亮度增强膜随转轮转动后的使用效果， 其中图 3a和图 3b 分别代表了两种位置上的情形；  2 illustrates the application of a conventional brightness enhancement film on a light source based on light wavelength conversion; FIG. 3 illustrates the use effect of the existing brightness enhancement film as the wheel rotates, wherein FIGS. 3a and 3b represent two positions, respectively. On the situation;
图 4外观图示意了本实用新型光波长转换轮组件的结构； 图 5为图 4结构的后部及底视示意图；  Figure 4 is a schematic view showing the structure of the optical wavelength conversion wheel assembly of the present invention; Figure 5 is a rear and bottom view of the structure of Figure 4;
图 6为图 4结构的剖视图。 具体实施方式 下面， 结合附图所示之最佳实施例进一步阐述本实用新型。 如图 4 所示， 本实用新型光波长转换轮组件包括承载有一种或一种以上光波长转换材 料的光波长转换轮 3 , 连接并驱动该光波长转换轮 3转动的马达 6 , 及固定马达 6的支架 5; 还包括亮度增强膜 4, 该亮度增强膜 4被固定在所述支架 5上， 该亮度增强膜 5的平滑面紧 邻所述光波长转换轮 3 并与光波长转换材料相贴近。 如背景技术中描述的， 亮度增强膜若 与光波长转换轮贴附连接在一起并随之转动， 最终得到的光斑的发光角度将是随着光波长 转换轮的转动而不断变化的， 这使得亮度增强膜的效果无法发挥。 图 4 实施例把亮度增强 膜与光波长转换轮在空间上分离， 亮度增强膜并不随着光波长转换轮转动， 这样随着光波 长转换轮的转动亮度增强膜后最终得到的光斑的发光角度不会发生变化， 亮度增强的效果 得以体现。 所述光波长转换材料包括荧光粉、 纳米材料或发光染料， 可以通过一种或一种以上的 透明材料来结合在一起， 以便光源具有稳定的出光特性。 以但不限于荧光粉为例， 透明材 料可以是透明胶体或透明玻璃材料， 与荧光粉混合或溶合成型； 也可以是透明塑料薄膜材 料， 将荧光粉热压在该透明塑料薄膜材料上。 对具有防潮要求的荧光粉而言， 还可以用上 述提及的任何透明材料来夹持所述荧光粉， 及可进一步进行密封。 为便于光波长转换材料 散热， 光波长转换材料最好呈片状以层分布。 另外， 为提高光波长转换材料对光的吸收率， 还可以在光波长转换材料中混入散射颗粒， 例如但不限于氧化钛颗粒或氧化铝颗粒。 为了 提高激发光的利用率， 本实用新型釆用的光波长转换轮 3 最好包括用来透射激发光及反射 受激发光的分光滤光片， 因其为现有技术， 不在此赘述。 为节省材料， 光波长转换材料在光波长转换轮 3上一般呈环形分布。 所述亮度增强膜 4 的面积与投射在该光波长转换轮组件上的激发光斑的面积相当， 远小于光波长转换材料的 分布面积， 最好使亮度增强膜 4 完全覆盖该激发光斑。 为了利于最大化的发挥亮度增强膜 的作用以提高光源光出射亮度，所述亮度增强膜 4与光波长转换轮 3的距离控制为小于 0. 6 亳米。 进一步地， 本实用新型还可以包括设置在所述光波长转换材料和亮度增强膜 4 之间 的滤光片， 用来反射激发光及透射受激发光， 来提高光源出射光的色纯度， 同时将透射过 光波长转换材料而未被吸收的激发光再反射回光波长转换材料进行再次利用来提高光转换 效率。 该滤光片可以平贴光波长转换材料而固定在所述光波长转换轮 3 上； 但为了节省材 料成本起见， 该滤光片最好平贴亮度增强膜 4 而固定在所述支架 5上， 或者釆用在该亮度 增强膜的平滑面上鍍滤光膜层。 更进一步地， 在由激发光源投射的激发光与所述光波长转 换轮 3 之间设置一用来透射激发光及反射受激发光的第二滤光片， 用于反射向入射的激发 光方向发射的受激发光至相反方向， 将更有利于提高光源的光出射亮度。 可以将该第二滤 光片与所述亮度增强膜 4 隔着光波长转换轮 3 固定在一起， 同时通过缩小第二滤光片的面 积与亮度增强膜 4大体一致来节省成本。 图 5和图 6更详细地示意了本实用新型光波长转换轮组件最佳实施例的结构。通过图 5 及图 6的剖视图， 可以更清楚显示所述支架 5包括通过紧固装置紧固在一起的第一支架 51 和第二支架 52。 其中第一支架 51用来固定亮度增强膜 4, 第二支架 52用来固定马达 6 , 例 如但不限于用螺钉 63。 第一支架 51和第二支架 52例如但不限于通过紧固螺钉 53来固定。 为便于激发光的投射， 所述第二支架 52上与所述亮度增强膜 4隔着光波长转换轮 3相 对的位置处应至少有一通孔， 图 4和图 6则示意了第二支架 52的中空结构来等同替换所述 通孔。 为便于使用， 本实用新型光波长转换轮组件还可以在所述第二支架 52上设用来固定 激发光源的孔位、 槽位或定位架， 该孔位、 槽位或定位架的位置或形式依激发光源的种类、 大小而定， 图示的任何孔位并非唯一限定。 遵循本实用新型的思想， 本实用新型还单独提出一种光源， 包括用来产生用于激发光 波长转换材料的激发光的激发光源和光波长转换轮组件； 所述光波长转换轮组件包括承载 有一种或一种以上光波长转换材料的光波长转换轮 3和驱动该光波长转换轮转动的马达 6; 还包括亮度增强膜， 该亮度增强膜的平滑面紧邻所述光波长转换轮 3 并与光波长转换材料 相贴近； 激发光源的投射光与所述亮度增强膜隔着光波长转换轮相对； 光源的外罩或固定 架同时固定所述激发光源、 光波长转换轮组件和亮度增强膜， 使得光源发光时， 所述光波 长转换轮在马达 6 的驱动下处于相对于所述亮度增强膜和激发光源的转动中。 若所述光源 的外罩或固定架完全以本实用新型的光波长转换轮组件中的支架 5 来实现， 即把激发光源 也固定在支架 5 的适当位置上， 则本实用新型光源与本实用新型光波长转换轮组件的结构 基本一致。 本实用新型光源的意义在于可以使用现有光波长转换轮组件而无需订做新的光 波长转换轮组件。 在本实用新型光源中， 所述亮度增强膜的面积也可以与所述激发光源的投射光的光斑 面积相当， 远小于所述光波长转换材料的分布面积， 最好完全覆盖所述投射光的光斑。 所 述亮度增强膜与光波长转换轮 3 的距离小于 0. 6 亳米。 也可在所述亮度增强膜的平滑面上 鍍滤光膜层， 用来反射激发光及透射受激发光。 所述激发光源可以是固态发光器件， 例如 但不限于发 UV光的 LED或激光器件。 Figure 6 is a cross-sectional view of the structure of Figure 4. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be further described in conjunction with the preferred embodiments shown in the drawings. As shown in FIG. 4, the optical wavelength conversion wheel assembly of the present invention comprises a light wavelength conversion wheel 3 carrying one or more light wavelength conversion materials, a motor 6 connecting and driving the rotation of the light wavelength conversion wheel 3, and a fixed motor. a holder 5 of 6; further comprising a brightness enhancement film 4 fixed to the holder 5, the smooth surface of the brightness enhancement film 5 being in close proximity to the light wavelength conversion wheel 3 and being close to the light wavelength conversion material . As described in the background art, if the brightness enhancement film is attached and rotated with the light wavelength conversion wheel, the illumination angle of the finally obtained spot will be constantly changed as the light wavelength conversion wheel rotates, which makes The effect of the brightness enhancement film cannot be exerted. In the embodiment, the brightness enhancement film is spatially separated from the light wavelength conversion wheel, and the brightness enhancement film does not rotate with the light wavelength conversion wheel, so that the brightness angle of the spot finally obtained after the brightness of the light wavelength conversion wheel is enhanced by the film No change occurs, and the effect of brightness enhancement is reflected. The light wavelength conversion material comprises a phosphor, a nano material or a luminescent dye, which may be bonded together by one or more transparent materials, so that the light source has stable light-emitting characteristics. For example, but not limited to the phosphor, the transparent material may be a transparent colloid or a transparent glass material, mixed or lysed with the phosphor; or may be a transparent plastic film material, and the phosphor is hot pressed onto the transparent plastic film material. For phosphors having moisture-proof requirements, the phosphor can also be held with any of the transparent materials mentioned above, and can be further sealed. In order to facilitate heat dissipation of the light wavelength conversion material, the light wavelength conversion material is preferably distributed in a sheet form. Further, in order to increase the light absorption rate of the light wavelength conversion material, scattering particles such as, but not limited to, titanium oxide particles or alumina particles may be mixed in the light wavelength conversion material. In order to increase the utilization of the excitation light, the optical wavelength conversion wheel 3 used in the present invention preferably includes a spectroscopic filter for transmitting the excitation light and reflecting the excited light, which is not described herein because it is a prior art. In order to save material, the light wavelength conversion material is generally distributed in a ring shape on the light wavelength conversion wheel 3. The area of the brightness enhancement film 4 corresponds to the area of the excitation spot projected on the light wavelength conversion wheel assembly, which is much smaller than the distribution area of the light wavelength conversion material, and it is preferable that the brightness enhancement film 4 completely covers the excitation light spot. 6 亳米。 In order to maximize the effect of the brightness enhancement film to increase the light source light emission brightness, the distance between the brightness enhancement film 4 and the light wavelength conversion wheel 3 is controlled to be less than 0.6 mm. Further, the present invention may further include a filter disposed between the light wavelength conversion material and the brightness enhancement film 4 for reflecting the excitation light and transmitting the excited light to improve the color purity of the light emitted by the light source. The excitation light transmitted through the light wavelength conversion material and not absorbed is reflected back to the light wavelength conversion material for reuse to improve the light conversion efficiency. The filter may be fixed to the optical wavelength conversion wheel 3 by flattening the light wavelength conversion material; however, in order to save material cost, the filter is preferably attached to the bracket 5 with the brightness enhancement film 4 attached thereto. Or coating the filter layer on the smooth surface of the brightness enhancement film. Further, a second filter for transmitting the excitation light and reflecting the excited light is disposed between the excitation light projected by the excitation light source and the light wavelength conversion wheel 3 for reflecting the direction of the incident excitation light. The emitted excited light to the opposite direction will be more conducive to increasing the light exiting brightness of the light source. The second filter can be fixed to the brightness enhancement film 4 via the light wavelength conversion wheel 3 while saving the cost by reducing the area of the second filter substantially in agreement with the brightness enhancement film 4. Figures 5 and 6 illustrate in more detail the construction of a preferred embodiment of the optical wavelength conversion wheel assembly of the present invention. 5 and 6, it can be more clearly shown that the bracket 5 includes a first bracket 51 and a second bracket 52 that are fastened together by fastening means. The first bracket 51 is used to fix the brightness enhancement film 4, and the second bracket 52 is used to fix the motor 6, such as but not limited to the screw 63. The first bracket 51 and the second bracket 52 are fixed, for example but not limited to, by fastening screws 53. In order to facilitate the projection of the excitation light, at least a through hole is formed on the second bracket 52 at a position opposite to the brightness enhancement film 4 via the light wavelength conversion wheel 3, and FIGS. 4 and 6 illustrate the second bracket 52. The hollow structure is equivalent to replacing the through hole. For ease of use, the optical wavelength conversion wheel assembly of the present invention may further be provided with a hole position, a slot or a positioning frame for fixing the excitation light source on the second bracket 52, the position of the hole position, the slot position or the positioning frame or The form depends on the type and size of the excitation light source, and any hole position shown is not uniquely limited. In accordance with the teachings of the present invention, the present invention also separately provides a light source including an excitation light source and an optical wavelength conversion wheel assembly for generating excitation light for exciting a wavelength conversion material of light; the optical wavelength conversion wheel assembly includes a carrier a light wavelength conversion wheel 3 of one or more light wavelength conversion materials and a motor 6 that drives the rotation of the light wavelength conversion wheel; further comprising a brightness enhancement film, the smooth surface of the brightness enhancement film being adjacent to the light wavelength conversion wheel 3 and The light wavelength conversion material is close to each other; the projection light of the excitation light source is opposite to the brightness enhancement film by the light wavelength conversion wheel; the outer cover or the fixing frame of the light source simultaneously fixes the excitation light source, the light wavelength conversion wheel assembly and the brightness enhancement film, so that When the light source emits light, the light wavelength conversion wheel is driven by the motor 6 in rotation relative to the brightness enhancement film and the excitation light source. If the outer cover or the fixing frame of the light source is completely realized by the bracket 5 in the optical wavelength conversion wheel assembly of the present invention, that is, the excitation light source is also fixed at the proper position of the bracket 5, the light source of the present invention and the utility model The structure of the optical wavelength conversion wheel assembly is substantially the same. The significance of the light source of the present invention is that existing optical wavelength conversion wheel assemblies can be used without the need to order new optical wavelength conversion wheel assemblies. In the light source of the present invention, the area of the brightness enhancement film may also be equivalent to the spot area of the projection light of the excitation light source, which is much smaller than the distribution area of the light wavelength conversion material, and preferably completely covers the projection light. Spot. 6 亳米。 The brightness enhancement film and the light wavelength conversion wheel 3 distance is less than 0. 6 亳 meters. A smoothing layer may also be plated on the smooth surface of the brightness enhancement film for reflecting the excitation light and transmitting the excited light. The excitation source can be a solid state light emitting device such as, but not limited to, an LED that emits UV light or a laser device.

Claims

WO 2012/142877 权 利 要 求 书 PCT/CN2012/071793 WO 2012/142877 Claim PCT/CN2012/071793
1. 一种光波长转换轮组件,包括承载有一种或一种以上光波长转换材料的光波长转换轮（3), 驱动该光波长转换轮 （3) 转动的马达 (6) , 及固定马达（6) 的支架 （5); 还包括亮度增 强膜（4), 其特征在于： A light wavelength conversion wheel assembly comprising a light wavelength conversion wheel (3) carrying one or more light wavelength conversion materials, a motor (6) driving the light wavelength conversion wheel (3) to rotate, and a fixed motor (6) The bracket (5); further comprising a brightness enhancement film (4), characterized in that:
该亮度增强膜（4)被固定在所述支架 （5)上， 该亮度增强膜（5) 的平滑面紧邻所 述光波长转换轮 （3) 并与光波长转换材料相贴近。  The brightness enhancement film (4) is fixed to the holder (5), and the smooth surface of the brightness enhancement film (5) is in close proximity to the light wavelength conversion wheel (3) and is close to the light wavelength conversion material.
2. 根据权利要求 1所述的光波长转换轮组件， 其特征在于： 2. The optical wavelength conversion wheel assembly of claim 1 wherein:
所述亮度增强膜（4) 完全覆盖投射在该光波长转换轮组件上的激发光斑， 面积远小 于所述光波长转换材料的分布面积。  The brightness enhancement film (4) completely covers the excitation spot projected on the light wavelength conversion wheel assembly, the area being much smaller than the distribution area of the light wavelength conversion material.
3. 根据权利要求 1所述的光波长转换轮组件， 其特征在于： 3. The optical wavelength conversion wheel assembly of claim 1 wherein:
所述支架（ 5 )包括通过紧固装置紧固在一起的第一支架（ 51 )和第二支架（ 52 ), 分 别用来固定所述亮度增强膜（4)和马达（6)。  The bracket (5) includes a first bracket (51) and a second bracket (52) fastened together by fastening means for fixing the brightness enhancement film (4) and the motor (6), respectively.
4. 根据权利要求 3所述的光波长转换轮组件， 其特征在于： 4. The optical wavelength conversion wheel assembly of claim 3, wherein:
所述第二支架（52) 上还设有用来固定激发光源的孔位、 槽位或定位架。  The second bracket (52) is further provided with a hole position, a slot or a positioning frame for fixing the excitation light source.
5. 根据权利要求 1所述的光波长转换轮组件， 其特征在于： 5. The optical wavelength conversion wheel assembly of claim 1 wherein:
所述亮度增强膜（4) 与光波长转换轮 （3) 的距离小于 0.6亳米。  The distance between the brightness enhancement film (4) and the light wavelength conversion wheel (3) is less than 0.6 mm.
6. 根据权利要求 1所述的光波长转换轮组件， 其特征在于： 6. The optical wavelength conversion wheel assembly of claim 1 wherein:
还包括设置在所述光波长转换材料和亮度增强膜 （4) 之间的滤光片， 该滤光片或者 平贴光波长转换材料而固定在所述光波长转换轮（3)上， 或者平贴亮度增强膜（4)而固 定在所述支架 （5)上， 或者直接加工形成于所述亮度增强膜的光滑面上。 Also included is a filter disposed between the light wavelength conversion material and the brightness enhancement film (4), the filter or the light wavelength conversion material is fixed to the light wavelength conversion wheel (3), or The brightness enhancement film (4) is attached to the holder (5), or directly formed on the smooth surface of the brightness enhancement film.
7. 一种光源，包括激发光源和光波长转换轮组件； 所述光波长转换轮组件包括承载有一种或 一种以上光波长转换材料的光波长转换轮 （3 )和驱动该光波长转换轮转动的马达 （6 ); 还包括亮度增强膜， 其特征在于： 7. A light source comprising an excitation source and a light wavelength conversion wheel assembly; the light wavelength conversion wheel assembly comprising a light wavelength conversion wheel (3) carrying one or more light wavelength conversion materials and driving the light wavelength conversion wheel to rotate The motor (6); further comprising a brightness enhancement film, characterized in that:
所述激发光源产生用于激发光波长转换材料的激发光；  The excitation light source generates excitation light for exciting the light wavelength conversion material;
所述亮度增强膜的平滑面紧邻所述光波长转换轮 （3 ) 并与光波长转换材料相贴近； 激发光源的投射光与所述亮度增强膜隔着光波长转换轮 （3 )相对；  a smooth surface of the brightness enhancement film is adjacent to the light wavelength conversion wheel (3) and is adjacent to the light wavelength conversion material; the projection light of the excitation light source is opposite to the brightness enhancement film across the light wavelength conversion wheel (3);
光源的外罩或固定架同时固定所述激发光源、 光波长转换轮组件和亮度增强膜， 使 得光源发光时， 所述光波长转换轮（3 )在马达（6 ) 的驱动下处于相对于所述亮度增强膜 和激发光源的转动中。  The outer cover or the fixing frame of the light source simultaneously fixes the excitation light source, the light wavelength conversion wheel assembly and the brightness enhancement film, so that when the light source emits light, the light wavelength conversion wheel (3) is driven by the motor (6) relative to the The brightness enhancement film and the excitation light source are rotated.
8. 根据权利要求 7所述的光源， 其特征在于： 8. The light source of claim 7, wherein:
所述亮度增强膜完全覆盖所述激发光源在所述光波长转换材轮上的投射光斑， 并远 小于所述光波长转换材料的分布面积。  The brightness enhancement film completely covers the projection spot of the excitation light source on the light wavelength conversion material wheel and is much smaller than the distribution area of the light wavelength conversion material.
9. 根据权利要求 7所述的光源， 其特征在于： 9. The light source of claim 7, wherein:
所述亮度增强膜与光波长转换轮 （3 ) 的距离小于 0. 6亳米。  The distance between the brightness enhancement film and the light wavelength conversion wheel (3) is less than 0.6 mm.
10. 根据权利要求 7所述的光源， 其特征在于： 10. The light source of claim 7, wherein:
在所述亮度增强膜的平滑面上鍍有滤光膜层， 用来反射激发光及透射受激发光。  A smoothing surface of the brightness enhancement film is coated with a filter film layer for reflecting the excitation light and transmitting the excited light.
1 1. 根据权利要求 7所述的光源， 其特征在于： 1 1. The light source of claim 7, wherein:
还包括一设置在由激发光源投射的激发光与所述光波长转换轮（ 3 )之间的第二滤光 片， 用来透射激发光及反射受激发光。  Also included is a second filter disposed between the excitation light projected by the excitation source and the optical wavelength conversion wheel (3) for transmitting the excitation light and reflecting the excited light.
PCT/CN2012/071793 2011-04-22 2012-02-29 Optical wavelength conversion wheel component with brightness enhancement film, and optical source WO2012142877A1 (en)

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CN202065917U (en) * 2011-04-22 2011-12-07 绎立锐光科技开发(深圳)有限公司 Optical wavelength conversion wheel component with brightness enhancing film and light source

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