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Method and device for adjusting color coordinates of emitted light from light source
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An adjustment method and a technology for adjusting devices, which are applied to light sources, electric light sources, lighting devices, etc., and can solve problems such as changes in color coordinates
Active Publication Date: 2015-11-25
YLX INC
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Problems solved by technology
[0007] In fact, not only green LEDs, but also red laser light sources have similar problems: the color coordinates of the emitted light from red laser light sources will change with changes in operating current or ambient temperature and other factors
Therefore, it is difficult in the prior art to provide a method for adjusting the color coordinates of the emitted light from the light source, so that the color of the emitted light remains stable.
Method used
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Embodiment 1
[0033] figure 2 It is a structural schematic diagram of the light source of the present invention, such as figure 2 As shown, the light source includes a first light emitting element 101, a second light emitting element 102, a third light emitting element 103 and a light combining device 104. The first light emitting element 101, the second light emitting element 102, and the third light emitting element 103 are specifically: green light LED, red LED and blue LED. The outgoing light of the green LED 101 , the red LED 102 and the blue LED 103 is synthesized by the light combining device 104 into one beam of light, which is green mixed light. Of course, in other embodiments of the present invention, there are many ways to combine light, which are not limited to the light combining device in this embodiment.
[0034] The color coordinates of green LEDs will change with changes in operating current, operating voltage, and operating temperature, while the color coordinates of r...
Embodiment 2
[0069] Figure 5 Another embodiment of the method for adjusting the color coordinates of the light emitted by the light source of the present invention, such as Figure 5 Shown, the step S23~S25 in the present embodiment and image 3 S12~S14 of the adjustment method of the color coordinates of the light emitted by the light source are the same, the difference is that image 3 Step S11 in the shown method comprises in this embodiment:
[0070] S21. Obtain the working parameters of the green LED;
[0071] S22. Acquire the color coordinates corresponding to the acquired operating parameters from the pre-saved correspondence between the color coordinates of the emitted light of the first light-emitting element and the operating parameters.
[0072] The working parameter here is specifically the working voltage or working current of the green LED. In other embodiments of the present invention, the working parameters may also be working temperature and other parameters related t...
Embodiment 3
[0075] Image 6 Another embodiment of the method for adjusting the color coordinates of the light emitted by the light source of the present invention, such as Image 6 As shown, step S31 and image 3 The step S11 of the method for adjusting the color coordinates of the emitted light from the light source is the same, and steps S34~S35 are the same as image 3 S13~S14 of the adjustment method of the color coordinates of the light emitted by the light source are the same, the difference is that image 3 Step S12 in the shown method comprises in this embodiment:
[0076] S32. Obtain the working current or working voltage of the green LED.
[0077] Similarly, in other embodiments of the present invention, the above-mentioned working current or working voltage may be other working parameters, such as working temperature and the like.
[0078] S33. Obtain the luminance corresponding to the obtained operating current or operating voltage from the pre-saved correspondence between...
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Abstract
An embodiment of the invention discloses an adjusting method and an adjusting device for color coordinates of light source emergent light. A light source comprises a first light emitting element, a second light emitting element and a third light emitting element; the light source emergent light is formed by mixture of light emitted from the first light emitting element, the second light emitting element and the third light emitting element; the color coordinates of the first light emitting element emergent light change along with variations of working parameters; the color coordinates of the second light emitting element emergent light and the third light emitting element emergent light keep unchanged. The adjusting method comprises obtaining the color coordinates of the first light emitting element emergent light; obtaining the brightness of the first light emitting element emergent light; obtaining a predetermined under four-step MacAdam ellipse P; confirming the brightness of the second light emitting element and the third light emitting element according to the color coordinates and the brightness of the first light emitting element and the color coordinates of the second light emitting element and the third light emitting element to enable the color coordinates of the light source color coordinates to be arranged within the under four-step MacAdam ellipse P. According to the adjusting method for the color coordinates of the light source emergent light, the emergent light color remains stable.
Description
technical field [0001] The invention relates to the technical field of illumination and display, in particular to a method and an adjustment device for adjusting the color coordinates of emitted light from a light source. Background technique [0002] In the existing stage lights, RGB (red, green and blue) three-primary color light-emitting elements form a beam through wavelength synthesis. When the RGB monochromatic light is emitted, the RGB light-emitting elements are individually lit, and when the mixed light (such as white light) is emitted, the RGB light-emitting elements are respectively lit with appropriate brightness to synthesize the emitted light of the appropriate color. At the same time, the stage light can also change its luminous brightness by changing the driving power of the light-emitting element, thereby realizing the adjustable brightness of the light. [0003] However, the color coordinates of green LEDs drift significantly as the driving current changes...
Claims
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Application Information
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