Light source structure and method for improving light conversion efficiency based on fluorescent powder
A technology of light conversion and phosphor powder, which is applied to optical elements used to change the spectral characteristics of emitted light, light guides of lighting systems, optics, etc. efficiency and other issues, to achieve the effect of improving light conversion efficiency, meeting the requirements of light purity and low cost
Active Publication Date: 2013-06-12
APPOTRONICS CORP LTD
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Problems solved by technology
Its disadvantage is that the greater the heat generated by the light-emitting chip, the greater the impact on the excitation efficiency of the phosphor
Its shortcoming is that as the light source technology continues to develop, the output brightness and power of the light source are getting higher and higher. This structure ignores the influence of the heat energy accumulated by the phosphor itself on the light conversion efficiency under high excitation light power, which limits the light source. Further improvement in light conversion efficiency
[0008] The disadvantage of the above-mentioned prior art is that although the scheme disclosed in U.S. Patent No. 7,196,354B1 can maximize the efficiency of the light source, in the structure of the light source disclosed in the patent, the light emitted by the fluorescent powder is not absorbed and utilized. The excitation light can be passed directly (eg figure 1 a) or reflection (as in figure 1 As shown in b) is emitted from the exit surface of the light source, which is not conducive to improving the purity of light output
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[0034] Below, the present invention is further described in conjunction with the preferred embodiments shown in the accompanying drawings.
[0035] The light source of the present invention includes at least an exciting light source 1, an excited material 3, and a thermally conductive substrate 4; the excited material 3 is closely attached to the thermally conductive substrate 4, so that the accumulated heat is conducted and diffused in time. In order to make the light output directional conduction and have higher purity, the light source of the present invention also includes a spectroscopic filter 2, so that the excitation light source 1 faces the spectroscopic filter 2, so that the excitation light obliquely shoots to the spectroscopic filter 2 , and at the same time, the excited material 3 is arranged to be roughly facing the excitation light guided by the spectral filter 2 (that is to say, the plane formed by the excited material 3 is approximately perpendicular to the chi...
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The invention discloses a light source structure and a method for improving light conversion efficiency based on fluorescent powder. The light source structure comprises an excitation light source (1), an excited material (3) and a heat-conducting substrate (4), wherein the excited material (3) is adhered to the heat-conducting substrate (4). The light source structure also comprises a light-splitting light filter (2), wherein particularly, the excitation light source (1) faces the light-splitting light filter (2) to make an excitation light obliquely emitted to the light-splitting light filter (2); the excited material (3) substantially faces the excitation light which is guided by the light-splitting light filter (2); and a heat-conducting reflecting mirror is arranged between the excited material (3) and the heat-conducting substrate (4), so the utilization rate of the excitation light can be improved. Apart from improvement on light source efficiency, the invention has the advantages of simple structure and low cost.
Description
[0001] This application is a divisional application with the application number 200810065225.X and the title of the invention "Light Source Structure Based on Phosphor Powder Improving Light Conversion Efficiency" submitted by the applicant on January 29, 2008. technical field [0002] The present invention relates to a light source module, in particular to a light source module based on fluorescent powder excitation, especially to an improved structure of a light source that makes outgoing light purer by means of element combination. Background technique [0003] Since the early 1990s, with the rapid development of a new generation of semiconductor optoelectronic materials based on InGaAlP and InGaN, various high-power and high-brightness red, yellow, blue, green, ultraviolet and white LED light sources have emerged. , emerge in endlessly, and have been more and more widely used in various display and lighting fields. [0004] In addition to using light-emitting diodes of c...
Claims
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IPC IPC(8): F21V9/10F21V7/22F21V8/00F21V9/40
Inventor李屹杨毅
OwnerAPPOTRONICS CORP LTD