Method for adjusting fluorescent powder proportion of white-light LED based on production data
A technology for producing data and phosphors, applied in electrical components, circuits, semiconductor devices, etc., can solve problems such as affecting the production efficiency of production lines, relatively large fluctuations in the yield rate of white LED packaging production lines, and unqualified color temperature of white LED products. The effect of avoiding personnel dependencies, quick adjustments, and avoiding uncertainty
Active Publication Date: 2019-08-16
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
Due to the existence of the above factors, a certain white light LED product may become a defective product due to unqualified color temperature during the production process.
[0004] At present, the product yield rate of the white LED packaging production line fluctuates greatly, and if the manual sample sampling mechanism is widely adopted to ensure the product yield rate, the production efficiency of the production line will be affected
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[0043] In order to make the purpose and technical solution of the present invention clearer, the present invention will be described in further detail below in conjunction with the examples and accompanying drawings, but the embodiments of the present invention are not limited thereto.
[0044] A method of adjusting the ratio of white light LED phosphor powder according to the production data in this embodiment, such as figure 1 and figure 2 As shown, according to the data of the furnace pre-sampling inspection and product inspection in the white LED packaging process, referring to the characteristic parameters and their composition ratio of the yellow, red and green phosphors used, in a certain white LED production process Automatically adjust the formula ratio of the yellow, red and green phosphors it uses, specifically including the following steps:
[0045] 1) In the pre-sampling inspection before the furnace or product inspection after baking, set the LED photoelectric ...
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The invention discloses a method for adjusting the fluorescent powder proportion of a white-light LED based on production data, comprising the following steps of: 1) determining whether a current product has abnormal parameters according to the data of furnace-front pre-spot check and product detection in the white-light LED packaging process, and if so, going to an exception handling alarm program; 2) if not, querying an MacAdam ellipse table according to the data of furnace-front pre-spot check and product detection, and calculating whether the chromaticity coordinate of the current productexceeds the just noticeable difference relative to a standard product; and 3) if so, with reference to the characteristic parameters and the composition ratios of the yellow, red and green fluorescentpowders used in the standard product and the wavelength of the used blue-light LED chip, calculating the type and the total quantity of the fluorescent powder required to be adjusted. The method calculates and adjusts the type and the quantity of the fluorescent powder according to the actual situation of product quality fluctuation, avoids the uncertainty of blind adjustment, and avoids the personnel dependency adjusted according to experience.
Description
technical field [0001] The invention relates to a technology for automatically adjusting the ratio of phosphor powder in the field of white LED packaging, in particular to a method for adjusting the ratio of white LED phosphor powder according to production data. Background technique [0002] Currently, there are three main methods of manufacturing white LEDs: a) tricolor LED color mixing method; b) ultraviolet LED excited phosphor powder color mixing method; c) blue light LED excited phosphor powder color mixing method. Among them, the method c) has the advantages of low cost, small color cast and small limitations, and is widely used in large-scale industrial manufacturing. This method uses an InGaN-based blue LED as an excitation source, and a part of the blue light excites the phosphor (mainly garnet phosphor) material to emit light, and the other part is emitted through the luminescent material. The two kinds of light are mixed together to obtain white light, that is, w...
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Login to View More IPC IPC(8): H01L33/50
CPCH01L33/50H01L2933/0041
Inventor 陈安高红霞吴忻生罗艳辉王博
Owner SOUTH CHINA UNIV OF TECH