Patent Application
20120264236
1. Field of the Invention
The present invention relates to a fluorescence powder spraying device and method, and in particular to a fluorescence powder spraying device and method capable of detecting instantly the color temperature of white light in a manufacturing process.
In general, the power consumption of white light light-emitting-diode (LED) is only ⅓ to ⅕ of an ordinary tungsten filament light bulb, as such, it is considered a mainstay of the future as a “green illumination light source”. Presently, white light LED is made by spraying fluorescence powder on the surface of LED, to obtain white light of uniform color temperature without yellow halo.
In practice, in the fluorescence powder spraying process, the spraying is performed multiple times on the surface of LED, such that the color temperature of white can only be known when the manufacturing process is over, so there is no way of knowing instantly color temperature of white light in a manufacturing process, therefore, it is not able to raise the yield of the LED capable of reaching the to get temperature.
Therefore, presently, the design and manufacturing of LEDs by means of spraying fluorescence powder is not quite satisfactory, and it has much room for improvements.
SUMMARY OF THE INVENTION
In view of the problems and drawbacks of the prior art, the present invention provides a fluorescence powder spraying device and method capable of detecting instantly the color temperature of white light in a manufacturing process, so as to overcome the shortcomings of the prior art.
A major objective of the present invention is to provide a fluorescence powder spraying device and method capable of detecting instantly the color temperature of white light in a manufacturing process, that is able to detect the color temperature of the sprayed fluorescence powder layer, to raise the yield of LED capable of reaching the target temperature.
In order to achieve the objective mentioned above, the present invention provides a fluorescence powder spraying device and method capable of detecting instantly color temperature of white light in a manufacturing process, comprising: a spraying region, provided with a movable nozzle and the LED component-to-be-sprayed; a measuring region, provided with a light source and a light detector or an integration ball; and a monitor plate, which undergoes at least a fluorescence powder spraying process with the LED components-be-sprayed below the movable nozzle, to form at least a fluorescence powder layer on the monitor plate and the LED component-to-be-sprayed, and then move the monitor plate to the measuring region, to use a light detector or an integration ball to measure the color temperature of white light produced by the fluorescence powder layer on the monitor plate when it is agitated by the light source.
The present invention also provides a method capable of detecting instantly color temperature of fluorescence powder in a manufacturing process, comprising the following steps: provide a monitor plate; perform a fluorescence powder spraying process for the monitor plate together with the LED components-to-be-sprayed, to form at least a fluorescence powder layer on the monitor plate and the LED components-to-be-sprayed; and agitate the fluorescence powder layer on the monitor plate with lights from the light source, to measure the color temperature of the fluorescence powder layer.
Further scope of the applicability of the present invention will become apparent from the detailed descriptions given hereinafter. However, it should be understood that the detailed descriptions and specific examples, while indicating preferred embodiments of the present invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the present invention will become apparent to those skilled in the art from this detailed descriptions,
The related drawings in connection with the detailed descriptions of the present invention to be made later are described briefly as follows, in which:
a) is a schematic diagram showing using a fluorescence powder spraying device capable of detecting instantly color temperature of white light in a manufacturing process to perform fluorescence powder spraying according to. the present invention;
b) is a schematic diagram showing using a fluorescence powder spraying device capable of detecting instantly color temperature of white light in a manufacturing process to perform color temperature detection for the fluorescence powder layer on a monitor plate according to the present invention; and
The purpose, construction, features, functions and advantages of the present invention can be appreciated and understood more thoroughly through the following detailed descriptions with reference to the attached drawings.
Refer to
As shown in
The spraying region 12 is provided with a movable nozzle 20, and an LED component-to-be-sprayed 22 is subject to the fluorescence powder spraying of the movable nozzle 20. The measuring region 14 is provided with a light source 24, and a light detector 26 or an integration ball.
In the descriptions mentioned above, the wavelengths of lights emitted by the light source 24 and the LED components-to-be-sprayed 22 are the same, and a partition wall 28 is disposed between spraying region 12 and the measuring region 14, so that the space not disposed with the partition wall 28 is reserved for the automatic arm 16 to move in and between spraying region 12 and the measuring region 14. The monitor plate 18 is made of a transparent material selected from a group consisting of: glass, quartz, gallium nitride, or sapphire. The LED component-to-be-sprayed 22 is formed by more than one LED elements with a frame, a wafer, or a circuit board.
Subsequently, refer to
Through the fluorescence powder spraying device and method capable of detecting instantly color temperature of white light in a manufacturing process, the color temperature of white light of a sprayed fluorescence powder layer can be detected speedily in a manufacturing process, thus raising yield of LEDs capable of reaching the target color temperature.
The above detailed description of the preferred embodiment is intended to describe more clearly the characteristics and spirit of the present invention. However, the preferred embodiments disclosed above are not intended to be any restrictions to the scope of the present invention. Conversely, its purpose is to include the various changes and equivalent arrangements which are within the scope of the appended claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 100113250 | Apr 2011 | TW | national |
