Illuminator
A lighting device and optical film technology, which is applied in the direction of lighting devices, lighting device components, lighting and heating equipment, etc., can solve the problems of limited use, affecting the use of LED lighting devices, and complex control methods such as driver ICs
Inactive Publication Date: 2010-07-21
FOXSEMICON INTEGRATED TECHNOLOGY (SHANGHAI) INC +1
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Problems solved by technology
The PWM control method is mainly to control the ratio of LED on time to off time, and divide the ratio of LED on time to off time into several levels. Different levels correspond to different colors of light output light, but this control method is more complicated and requires more driver IC
If the driver IC breaks down, it will affect the use of the entire LED lighting device, therefore, the use of the existing LED lighting device is limited
Method used
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Embodiment Construction
[0010] Please refer to figure 1 , the lighting device 10 provided by the first embodiment of the present invention includes a light source 11 , an optical film 12 and a driving module 13 .
[0011] The light source 11 includes a substrate 111 and a plurality of LEDs 112 disposed on the substrate 111 . The plane where the plurality of LEDs 112 are located is the light emitting surface of the light source 11 . The plurality of light emitting diodes 112 are used to emit a first color light, and the wavelength range of the first color light can be any wavelength band of visible light, such as purple light to green light. In this embodiment, the plurality of light emitting diodes 112 are used to emit blue light, and the full width at half maximum (FWHM) of the blue light spectrum is not more than 30 nm. It can be understood that the first color light can also be ultraviolet light.
[0012] The optical film 12 is a strip-shaped light-transmitting film with a light transmittance g...
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The invention provides an illuminator, which comprises a light source, an elongated optical film and a driving module group, wherein the light source is used for sending the first chromatic light, the elongated optical film is arranged opposite to the light source, and comprises a plurality of light transmission regions which are continuously distributed in the length extension direction of the optical film, at least one light transmission region in the plurality of light transmission regions comprises at least one kind of fluorescent powder which gives out other chromatic light different from the first chromatic light under the excitation of the first chromatic light, the driving module group is mechanically connected with the optical film, the driving module group is used for driving the light transmission regions opposite to the light source in the optical film to move in the length extension direction of the optical film, so the first chromatic light sent by the light source is emitted out from at least one light transmission region of the optical element, and the fluorescent powder is used for giving out other chromatic light different from the first chromatic light under the excitation of the first chromatic light.
Description
technical field [0001] The invention relates to a lighting device. Background technique [0002] Light Emitting Diode (LED, Light Emitting Diode) has the advantages of high brightness, low operating voltage, low power consumption, easy matching with integrated circuits, simple driving, and long life, so it can be used as a light source and widely used in the lighting field. For details, please refer to Joseph Bielecki et al. wrote Thermal Considerations for LED Components in an Automotive Lamp in the 2007 IEEE, 23rd IEEE SEMI-THERM Symposium. [0003] Existing LED lighting devices generally include at least two kinds of LEDs that can emit different monochromatic lights, and the desired color light can be obtained by mixing the monochromatic lights emitted by the two LEDs and modulating the current of the two LEDs. Here, in order to obtain stable color light output, the current of each LED must be precisely controlled. In the prior art, a PWM (Pulse Width Modulation) contro...
Claims
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IPC IPC(8): F21S2/00F21V9/16F21V23/00H05B37/02F21Y101/02F21V9/40
CPCF21S10/02F21Y2105/001F21V14/006F21Y2101/02F21Y2105/10F21Y2115/10
Inventor 赖志铭
Owner FOXSEMICON INTEGRATED TECHNOLOGY (SHANGHAI) INC