WO2021128229A1 - 一种待转移led芯片的筛选方法及装置 - Google Patents

一种待转移led芯片的筛选方法及装置 Download PDF

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WO2021128229A1
WO2021128229A1 PCT/CN2019/128922 CN2019128922W WO2021128229A1 WO 2021128229 A1 WO2021128229 A1 WO 2021128229A1 CN 2019128922 W CN2019128922 W CN 2019128922W WO 2021128229 A1 WO2021128229 A1 WO 2021128229A1
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spectrum
led chips
threshold
frequency
transferred
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PCT/CN2019/128922
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English (en)
French (fr)
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许时渊
周充祐
陈淑枝
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重庆康佳光电技术研究院有限公司
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Priority to PCT/CN2019/128922 priority Critical patent/WO2021128229A1/zh
Priority to CN201980003330.7A priority patent/CN111107948B/zh
Publication of WO2021128229A1 publication Critical patent/WO2021128229A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34—Sorting according to other particular properties
    • B07C5/342—Sorting according to other particular properties according to optical properties, e.g. colour
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/36—Sorting apparatus characterised by the means used for distribution
    • B07C5/361—Processing or control devices therefor, e.g. escort memory
    • B07C5/362—Separating or distributor mechanisms

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  • the invention belongs to the technical field of semiconductor optoelectronics, and in particular relates to a screening method and device for LED chips to be transferred.
  • Micro-LED technology that is, LED miniaturization and matrix technology, has good stability, longevity, and operating temperature advantages. It also inherits the advantages of LED low power consumption, color saturation, fast response speed, strong contrast, etc. , Micro-LED has higher brightness and lower power consumption, which makes Micro-LED have great application prospects.
  • the massive transfer of Micro-LED is to transfer thousands of LEDs on the carrier substrate to the target backplane to form the final Micro-LED display device.
  • the LEDs need to be screened to ensure that each LED transferred can be used normally.
  • the existing screening method is to energize the LED and determine whether the LED emits light to determine whether to transfer the LED. For devices that require high LED luminescence consistency, this screening method is not applicable.
  • the purpose of the present invention is to provide a method and device for screening LED chips to be transferred, which overcomes the prior art by judging whether the LED emits light to determine whether to transfer the LED, and the LED emits light. Defects that are not applicable to equipment with higher consistency requirements.
  • the first embodiment disclosed in the present invention is a method for screening LED chips to be transferred, which includes the following steps:
  • the LED chips to be transferred are screened out according to the spectrum information.
  • the frequency spectrum information includes the half-width of the frequency spectrum and the frequency corresponding to the peak of the frequency spectrum.
  • the step of screening out the LED chips to be transferred according to the frequency spectrum information specifically includes:
  • the LED chip is to be The transferred LED chip.
  • the method further includes:
  • a driving voltage is applied to the LED chip to cause the LED chip to generate a light beam.
  • the method for screening the LED chips to be transferred wherein, before the step of screening out the LED chips to be transferred according to the frequency spectrum information, the method further includes:
  • the LED chips include red LED chips, green LED chips, and blue LED chips.
  • the method for screening LED chips to be transferred wherein, before the step of judging whether the half-height width of the frequency spectrum is less than a preset first threshold, the method further includes:
  • the first threshold value includes a first red light threshold value, a first green light threshold value, and a first blue light threshold value
  • the standard frequency includes a red light standard frequency and a green light standard frequency And Blu-ray standard frequency
  • the step of acquiring spectrum information of a plurality of LED chips, and determining the first threshold value and the standard frequency according to the spectrum information includes:
  • the step of screening out the LED chips to be transferred according to the spectrum information includes:
  • the The LED chip is the LED chip to be transferred.
  • the step of screening the LED chips to be transferred according to the spectrum information includes:
  • the The LED chip is the LED chip to be transferred.
  • the step of screening the LED chips to be transferred according to the spectrum information includes:
  • the LED chip is determined Is the LED chip to be transferred.
  • the method for screening the LED chips to be transferred wherein after the step of screening out the LED chips to be transferred according to the frequency spectrum information, the method further includes:
  • the LED chip to be transferred is transferred according to the location information file.
  • the second embodiment disclosed in the present invention is a screening device for LED chips to be transferred, which includes:
  • Detector used to receive the light beam generated by the LED chip
  • a spectrum analyzer configured to perform spectrum analysis on the light beam and obtain spectrum information corresponding to the light beam
  • the processor is used to screen out the LED chips to be transferred according to the spectrum information.
  • the screening device for LED chips to be transferred which further includes:
  • the voltage applicator is used to apply a driving voltage to the LED chip to make the LED chip generate a light beam.
  • the present invention provides a method and device for screening LED chips to be transferred.
  • the LED chips to be transferred are screened by comparing the spectrum information corresponding to the light beam generated by the LED chip with a preset threshold, and the color of the LED chip to be screened is The purity is qualified and there is no color difference, and the luminous consistency is high. For RGB display, it can effectively distinguish the light uniformity, and then achieve the display color uniformity of light mixing.
  • Fig. 1 is a flowchart of a preferred embodiment of a screening method for LED chips to be transferred provided by the present invention
  • FIG. 2 is a flowchart of a specific application embodiment of a method for screening LED chips to be transferred provided by the present invention
  • Fig. 3 is a schematic structural diagram of a screening device for LED chips to be transferred provided by the present invention.
  • the first embodiment of the present invention provides a method for screening LED chips to be transferred.
  • a screening method for LED chips to be transferred includes the following steps:
  • the LED chip screened by this method has poor luminescence consistency. Since the luminescence consistency of the LED chip is related to its frequency spectrum, in order to solve the above problem, in this embodiment, after receiving the light beam generated by the LED chip, the light beam is input into the spectrum analyzer, and the obtained light beam is analyzed and output by the spectrum analyzer. According to the spectrum information, the LED chips to be transferred are screened out according to the obtained spectrum information. Since the spectrum information of the screened LED chips is consistent, their luminescence consistency is better.
  • the spectrum information includes the half-height width of the spectrum and the frequency corresponding to the peak of the spectrum
  • the step S3 specifically includes:
  • S31 Determine whether the half-height width of the spectrum is less than a preset first threshold, and determine whether the absolute value of the difference between the frequency corresponding to the peak of the spectrum and the standard frequency is less than the preset second threshold;
  • the spectrum information includes the half-width of the spectrum and the frequency corresponding to the peak of the spectrum, and the first threshold, the standard frequency, and the second threshold are preset.
  • the half-height width of the spectrum reflects the color purity of the LED chip. After obtaining the spectrum information, it is determined whether the half-height width of the spectrum in the spectrum information is less than the preset first threshold, so that the selected LED chips have good quality. Color purity.
  • the frequency corresponding to the peak of the spectrum reflects the color difference of the LED chip, and it is judged whether the absolute value of the difference between the frequency corresponding to the peak of the spectrum of the LED chip and the standard frequency is less than the preset second threshold, so that the selected LED chip has no color difference .
  • the LED chips are screened by judging whether the half-height width of the spectrum is less than the preset first threshold and whether the absolute value of the difference between the frequency corresponding to the peak of the spectrum and the standard frequency is less than the preset second threshold.
  • the chip emits a light beam and satisfies that the half-height width of the spectrum is less than the preset first threshold and the absolute value of the difference between the frequency corresponding to the peak of the spectrum and the standard frequency is less than the preset second threshold, it is determined that the LED chip is to be transferred LED chips can be screened out with high color purity, no color difference, and good luminescence uniformity.
  • the method before the step S1, the method further includes the following steps:
  • a driving voltage in order to obtain the spectrum information of the light beam generated by the LED chip, a driving voltage needs to be applied to the LED chip in advance to make the LED generate a light beam.
  • the driving voltage varies according to chip differences.
  • the driving voltage is 2.9-3.1V, and decreases as the chip size decreases.
  • the method before the step S3, the method further includes the following steps:
  • M3. Acquire spectrum information of multiple LED chips, and determine the first threshold and the standard frequency according to the spectrum information.
  • the LED chips are normal LED chips. Considering that LED chips of different batches may be different, in a specific embodiment, the plurality of LED chips are normal LED chips of the same batch as the LED chips to be transferred.
  • the average value of the half-height width of the spectrum in each spectrum information is taken as the preset first threshold, for example, the first threshold is 10- 30nm.
  • the average value of the frequency corresponding to the peak of the spectrum in each spectrum information is taken as the standard frequency.
  • the first threshold and the standard frequency are set according to the average value of a plurality of LED chips, and LED chips with qualified color purity and no color difference can be screened out according to LED batches.
  • the LED chip includes a red LED chip, a green LED chip, and a blue LED chip;
  • the first threshold includes a first red threshold, a first green threshold, and a first blue threshold;
  • the standard frequency includes a red light standard frequency, a green light standard frequency and a blue light standard frequency, and the step M3 includes:
  • M31 Acquire frequency spectrum information of multiple red light LED chips, and determine the first red light threshold and the red light standard frequency according to the frequency spectrum information;
  • M32 Acquire spectrum information of multiple green LED chips, and determine the first green light threshold and the green light standard frequency according to the spectrum information;
  • M33 Obtain spectrum information of a plurality of blue LED chips, and determine the first blue threshold value and the blue standard frequency according to the spectrum information.
  • the LED chip includes a red LED chip, a green LED chip, and a blue LED chip. Since the half-height width of the spectrum of the LED chips of different colors and the frequency corresponding to the peak of the spectrum will be different, in order to be more The LED chips with high color purity and no color difference are further screened.
  • the first threshold and standard frequency when the first threshold and standard frequency are set, the first thresholds of the red LED chip, the green LED chip and the blue LED chip are set respectively, that is, the first red LED chip.
  • Light threshold, first green light threshold, and first blue light threshold are set, namely, the red standard frequency, the green standard frequency and the blue standard frequency.
  • the first threshold and standard frequency it is necessary to obtain the spectrum information of multiple red LED chips, multiple green LED chips, and multiple blue LED chips, respectively, and take the spectrum information of multiple red LED chips to correspond to
  • the half-height width of the spectrum and the average value of the frequency corresponding to the peak of the spectrum are respectively used as the first red light threshold and the red standard frequency; take the spectrum information of multiple green LED chips corresponding to the half-height width of the spectrum and the peak of the spectrum
  • the average values of the corresponding frequencies are respectively used as the first green light threshold and the green light standard frequency; take the half-height width of the spectrum corresponding to the spectrum information of multiple blue LED chips and the average value of the frequency corresponding to the peak of the spectrum respectively as the first blue light Threshold and blue standard frequency.
  • the method for obtaining the spectrum information of the multiple red LED chips, the multiple green LED chips, and the multiple blue LED chips is the same as the method for obtaining the spectrum information of the LED chips to be screened in the foregoing steps, and will not be repeated here.
  • the step S3 includes:
  • S311 Determine whether the full width at half maximum of the spectrum is less than a preset first red light threshold, and determine whether the absolute value of the difference between the frequency corresponding to the peak of the spectrum and the red light standard frequency is less than the preset second threshold ;
  • the LED chip is the LED chip to be transferred.
  • the type of the LED chip that is, to determine whether the LED chip belongs to a red LED chip, a green LED chip or a blue light.
  • LED chip When the LED chip is a red LED chip, the half-height width of the spectrum in the spectrum information is compared with the preset first red light threshold, and the frequency corresponding to the peak of the spectrum in the spectrum information is compared with the red light standard frequency The absolute value of the difference is compared with the preset second threshold.
  • the red LED chip is the LED chip to be transferred.
  • the step S3 includes:
  • the half-height width of the spectrum in the spectrum information is compared with a preset first green light threshold, and the peak of the spectrum in the spectrum information is compared.
  • the absolute value of the difference between the corresponding frequency and the green light standard frequency is compared with the preset second threshold.
  • the step S3 includes:
  • the half-height width of the spectrum in the spectrum information is compared with a preset first blue threshold, and the peak of the spectrum in the spectrum information corresponds to The absolute value of the difference between the frequency and the blue standard frequency is compared with the preset second threshold.
  • the half-maximum width of the spectrum is less than the preset first blue threshold, and the difference between the frequency corresponding to the peak of the spectrum and the blue standard frequency If the absolute value of is smaller than the preset second threshold, it is determined that the blue LED chip is the LED chip to be transferred.
  • the method further includes the following steps:
  • a location information file is further generated according to the location information of the LED chips to be transferred or the LED chips not to be transferred, and the LED chips to be transferred are performed according to the location information file. Transfer.
  • the present invention also provides a specific application embodiment, as shown in FIG. 2, which specifically includes the following steps:
  • Step 201 Receive the light beam generated by the LED chip
  • Step 202 Obtain spectrum information corresponding to the light beam.
  • Step 203 Determine whether the half-height width of the frequency spectrum is less than the first threshold; if yes, go to step 204, if not, go to step 206;
  • Step 204 Determine whether the absolute value of the difference between the frequency corresponding to the peak of the spectrum and the standard frequency is less than the second threshold; if yes, go to step 205, if not, go to step 206;
  • Step 205 Determine that the LED chip is the LED chip to be transferred
  • Step 206 Determine that the LED chip is not the LED chip to be transferred.
  • a screening device corresponding to the above-mentioned screening method for the LED chips to be transferred is also provided.
  • the device includes: a detector 2 for receiving the light beam generated by the LED chip 1; and a spectrum analyzer 3 for detecting the light beam received by the detector 2 Perform spectrum analysis; the processor 4 is used to screen out the LED chip 1 to be transferred according to the spectrum result obtained by the spectrum analyzer 3.
  • the device further includes a voltage applicator, the LED chip 1 is arranged on the substrate 5, and the voltage applicator is used to apply a driving voltage to the LED chip 1 so that the LED chip 1 generates beam.
  • the present invention provides a method and device for screening LED chips to be transferred.
  • the method includes the steps of: receiving a light beam generated by the LED chip; performing spectrum analysis on the light beam to obtain spectrum information corresponding to the light beam ; Screen out the LED chips to be transferred according to the spectrum information.
  • the LED chips to be transferred are screened by comparing the spectrum information corresponding to the light beam generated by the LED chip with a preset threshold.
  • the screened LED chips have qualified color purity and no color difference, high luminous consistency, and can effectively distinguish RGB displays.
  • the uniformity of the light is good or bad, and the uniformity of the mixed light color is achieved.

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Abstract

本发明提供了一种待转移LED芯片的筛选方法及装置，所述方法包括步骤：接收LED芯片产生的光束；对所述光束进行频谱分析，获取所述光束对应的频谱信息；根据所述频谱信息筛选出待转移的LED芯片。本申请通过将LED芯片产生的光束对应的频谱信息与预设的阈值进行比较筛选待转移的LED芯片，筛选出的LED芯片色彩纯度合格且无色差，发光一致性高，对于RGB显示可以有效区分光均匀性好坏，进而达成显示混光色均匀性。

Description

一种待转移LED芯片的筛选方法及装置 技术领域
本发明属于半导体光电子技术领域，尤其涉及一种待转移LED芯片的筛选方法及装置。
背景技术
Micro-LED技术，即LED微缩化和矩阵化技术，具有良好的稳定性，寿命，以及运行温度上的优势，同时也承继了LED低功耗、色彩饱和度、反应速度快、对比度强等优点，Micro-LED的亮度更高，且功率消耗量更低，使得Micro-LED具有极大地应用前景。
Micro-LED的巨量转移是将载体基板上成千上万颗LED转移到目标背板上形成最终的Micro-LED显示器件。在对Micro-LED进行巨量转移前需要对LED进行筛选，确保转移的每颗LED都能够正常使用。现有筛选方法是对LED进行通电，判断LED是否发光来决定是否对LED进行转移，对LED发光一致性要求较高的设备，此种筛选方法并不适用。
因此，现有技术有待于进一步的改进。
发明内容
鉴于上述现有技术中的不足之处，本发明的目的在于提供一种待转移LED芯片的筛选方法及装置，克服现有技术中通过判断LED是否发光来决定是否对LED进行转移，对LED发光一致性要求较高的设备不适用的缺陷。
本发明所公开的第一实施例为一种待转移LED芯片的筛选方法，其中，包括步骤：
接收LED芯片产生的光束；
对所述光束进行频谱分析，获取所述光束对应的频谱信息；
根据所述频谱信息筛选出待转移的LED芯片。
所述的LED芯片筛选方法，其中，所述频谱信息包括频谱的半高宽和频谱的波峰对应的频率。
所述的待转移LED芯片的筛选方法，其中，所述根据所述频谱信息筛选出待转移的LED芯片的步骤具体包括：
判断所述频谱的半高宽是否小于预设的第一阈值，以及判断所述频谱的波峰对应的频率与标准频率的差值的绝对值是否小于预设的第二阈值；
若所述频谱的半高宽小于预设的第一阈值，且所述频谱的波峰对应的频率与标准频率的差值的绝对值小于预设的第二阈值，则确定所述LED芯片为待转移的LED芯片。
所述的待转移LED芯片的筛选方法，其中，所述接收LED芯片产生的光束的步骤之前还包括：
对所述LED芯片施加驱动电压，使所述LED芯片产生光束。
所述的待转移LED芯片的筛选方法，其中，所述根据所述频谱信息筛选出待转移的LED芯片的步骤之前还包括：
获取多个LED芯片的频谱信息，根据所述频谱信息确定所述第一阈值和所述标准频率。
所述的待转移LED芯片的筛选方法，其中，所述LED芯片包括红光LED芯片、绿光LED芯片和蓝光LED芯片。
所述的待转移LED芯片的筛选方法，其中，所述判断所述频谱的半高宽是否小于预设的第一阈值的步骤之前还包括：
判断所述LED芯片的类型。
所述的待转移LED芯片的筛选方法，其中，所述第一阈值包括第一红光阈值、第一绿光阈值和第一蓝光阈值；所述标准频率包括红光标准频率、绿光标准频率和蓝光标准频率。
所述的待转移LED芯片的筛选方法，其中，所述获取多个LED芯片的频谱信息，根据所述频谱信息确定所述第一阈值和所述标准频率的步骤包括：
获取多个红光LED芯片的频谱信息，根据所述频谱信息确定所述第一红光阈值和所述红光标准频率；
获取多个绿光LED芯片的频谱信息，根据所述频谱信息确定所述第一绿光阈值和所述绿光标准频率；
获取多个蓝光LED芯片的频谱信息，根据所述频谱信息确定所述第一蓝光阈值和所述蓝光标准频率。
所述的待转移LED芯片的筛选方法，其中，当所述LED芯片为红光LED芯片时， 所述根据所述频谱信息筛选出待转移的LED芯片的步骤包括：
判断所述频谱的半高宽是否小于预设的第一红光阈值，以及判断所述频谱的波峰对应的频率与红光标准频率的差值的绝对值是否小于预设的第二阈值；
若所述频谱的半高宽小于预设的第一红光阈值，且所述频谱的波峰对应的频率与红光标准频率的差值的绝对值小于预设的第二阈值，则确定所述LED芯片为待转移的LED芯片。
所述的待转移LED芯片的筛选方法，其中，当所述LED芯片为绿光LED芯片时，所述根据所述频谱信息筛选出待转移的LED芯片的步骤包括：
判断所述频谱的半高宽是否小于预设的第一绿光阈值，以及判断所述频谱的波峰对应的频率与绿光标准频率的差值的绝对值是否小于预设的第二阈值；
若所述频谱的半高宽小于预设的第一绿光阈值，且所述频谱的波峰对应的频率与绿光标准频率的差值的绝对值小于预设的第二阈值，则确定所述LED芯片为待转移的LED芯片。
所述的待转移LED芯片的筛选方法，其中，当所述LED芯片为蓝光LED芯片时，所述根据所述频谱信息筛选出待转移的LED芯片的步骤包括：
判断所述频谱的半高宽是否小于预设的第一蓝光阈值，以及判断所述频谱的波峰对应的频率与蓝光标准频率的差值的绝对值是否小于预设的第二阈值；
若所述频谱的半高宽小于预设的第一蓝光阈值，且所述频谱的波峰对应的频率与蓝光标准频率的差值的绝对值小于预设的第二阈值，则确定所述LED芯片为待转移的LED芯片。
所述的待转移LED芯片的筛选方法，其中，所述根据所述频谱信息筛选出待转移的LED芯片的步骤之后还包括：
根据所述待转移LED芯片的位置信息生成位置信息文件；
根据所述位置信息文件对所述待转移LED芯片进行转移。
本发明所公开的第二实施例为一种待转移LED芯片的筛选装置，其中，包括：
探测器，用于接收LED芯片产生的光束；
频谱分析仪，用于对所述光束进行频谱分析，获取所述光束对应的频谱信息；
处理器，用于根据所述频谱信息筛选出待转移的LED芯片。
所述的待转移LED芯片的筛选装置，其中，还包括：
电压施加器，用于对所述LED芯片施加驱动电压，使所述LED芯片产生光束。
有益效果，本发明提供了一种待转移LED芯片的筛选方法及装置，通过将LED芯片产生的光束对应的频谱信息与预设的阈值进行比较筛选待转移的LED芯片，筛选出的LED芯片色彩纯度合格且无色差，发光一致性高，对于RGB显示可以有效区分光均匀性好坏，进而达成显示混光色均匀性。
附图说明
图1是本发明提供的一种待转移LED芯片的筛选方法的较佳实施例的流程图；
图2是本发明提供的一种待转移LED芯片的筛选方法的具体应用实施例的流程图；
图3是本发明提供的一种待转移LED芯片的筛选装置的结构示意图。
具体实施方式
为使本发明的目的、技术方案及优点更加清楚、明确，以下参照附图并举实施例对本发明进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
由于现有技术中通过判断LED是否发光来决定是否对LED进行转移，这种筛选方式对LED发光一致性要求较高的设备不适用。为了解决上述问题，本发明实施例一中提供了一种待转移LED芯片的筛选方法。
请参照图1，本发明提供的一种待转移LED芯片的筛选方法包括以下步骤：
S1、接收LED芯片产生的光束；
S2、对所述光束进行频谱分析，获取所述光束对应的频谱信息；
S3、根据所述频谱信息筛选出待转移的LED芯片。
在一具体实施方式中，由于现有的LED芯片筛选方法只是简单的通过判断LED芯片是否发光来判断是否对其进行转移，此种方法筛选出的LED芯片的发光一致性较差。由于LED芯片的发光一致性与其频谱有关，为了解决上述问题，本实施例中接收LED芯片产生的光束后，将光束输入频谱分析仪中，通过频谱分析仪对获取到的光束进行频谱分析并输出频谱信息，然后根据获取到的频谱信息筛选出待转移的LED芯片，由于筛选出的LED芯片的频谱信息一致，因而其发光一致性较好。
在一具体实施方式中，所述频谱信息包括频谱的半高宽和频谱的波峰对应的频率，所述步骤S3具体包括：
S31、判断所述频谱的半高宽是否小于预设的第一阈值，以及判断所述频谱的波峰 对应的频率与标准频率的差值的绝对值是否小于预设的第二阈值；
S32、若所述频谱的半高宽小于预设的第一阈值，且所述频谱的波峰对应的频率与标准频率的差值的绝对值小于预设的第二阈值，则确定所述LED芯片为待转移的LED芯片。
在一具体实施方式中，所述频谱信息包括频谱的半高宽和频谱的波峰对应的频率，并预先设置第一阈值、标准频率以及第二阈值。频谱的半高宽反应了LED芯片的色彩纯度，在获取到频谱信息后，判断所述频谱信息中的频谱的半高宽是否小于预设的第一阈值，从而使得筛选出的LED芯片具有良好的色彩纯度。频谱的波峰对应的频率反应了LED芯片的色差，判断LED芯片的频谱的波峰对应的频率与标准频率的差值的绝对值是否小于预设的第二阈值，从而使得筛选出的LED芯片无色差。本实施例中通过判断频谱的半高宽是否小于预设的第一阈值以及频谱的波峰对应的频率与标准频率的差值的绝对值是否小于预设的第二阈值来筛选LED芯片，当LED芯片发出光束同时满足频谱的半高宽小于预设的第一阈值和频谱的波峰对应的频率与标准频率的差值的绝对值小于预设的第二阈值时，才确定LED芯片为待转移的LED芯片，从而能够筛选出色彩纯度高且无色差、发光一致性好的LED芯片。
在一具体实施方式中，所述步骤S1之前还包括步骤：
S0、对所述LED芯片施加驱动电压，使所述LED芯片产生光束。
在一具体实施方式中，为了获取所述LED芯片产生光束的频谱信息，需要预先对所述LED芯片施加驱动电压，使所述LED产生光束。所述驱动电压依据芯片差异而不同，在一具体实施例中，所述驱动电压为2.9-3.1V，并且随着芯片尺寸减小而下降。
在一具体实施方式中，所述步骤S3之前还包括步骤：
M3、获取多个LED芯片的频谱信息，根据所述频谱信息确定所述第一阈值和所述标准频率。
在一具体实施方式中，根据所述频谱信息筛选出待转移的LED芯片的步骤之前还需要获取多个LED芯片的频谱信息，产生多个LED芯片对应的多个频谱信息，根据多个频谱信息确定第一阈值和标准频率。所述LED芯片为正常的LED芯片，考虑到不同批次的LED芯片会有差异，在一具体实施例中，所述多个LED芯片为与待转移LED芯片同一批次的正常LED芯片。
在一具体实施方式中，获取到多个LED芯片的频谱信息后，取各频谱信息中的频谱的半高宽的平均值作为预设的第一阈值，例如，所述第一阈值为10-30nm。获取到多 个LED芯片的频谱信息后，取各频谱信息中的频谱的波峰对应的频率的平均值作为标准频率。所述第一阈值和标准频率根据多个LED芯片的平均值设定，能够根据LED批次筛选出色彩纯度合格又无色差的LED芯片。
在一具体实施方式中，所述LED芯片包括红光LED芯片、绿光LED芯片和蓝光LED芯片；所述第一阈值包括第一红光阈值、第一绿光阈值和第一蓝光阈值；所述标准频率包括红光标准频率、绿光标准频率和蓝光标准频率，所述步骤M3包括：
M31、获取多个红光LED芯片的频谱信息，根据所述频谱信息确定所述第一红光阈值和所述红光标准频率；
M32、获取多个绿光LED芯片的频谱信息，根据所述频谱信息确定所述第一绿光阈值和所述绿光标准频率；
M33、获取多个蓝光LED芯片的频谱信息，根据所述频谱信息确定所述第一蓝光阈值和所述蓝光标准频率。
在一具体实施方式中，所述LED芯片包括红光LED芯片、绿光LED芯片和蓝光LED芯片，由于不同颜色LED芯片的频谱的半高宽和频谱的波峰对应的频率会有差异，为了更进一步筛选出色彩纯度高和无色差的LED芯片，本实施例在设定第一阈值和标准频率时分别设定红光LED芯片、绿光LED芯片和蓝光LED芯片的第一阈值即第一红光阈值、第一绿光阈值及第一蓝光阈值。同时分别设定红光LED芯片、绿光LED芯片和蓝光LED芯片的标准频率即红光标准频率、绿光标准频率及蓝光标准频率。
具体地，在确定第一阈值和标准频率时，需要分别获取多个红光LED芯片、多个绿光LED芯片和多个蓝光LED芯片的频谱信息，取多个红光LED芯片的频谱信息对应的频谱的半高宽和频谱的波峰对应的频率的平均值分别作为第一红光阈值和红光标准频率；取多个绿光LED芯片的频谱信息对应的频谱的半高宽和频谱的波峰对应的频率的平均值分别作为第一绿光阈值和绿光标准频率；取多个蓝光LED芯片的频谱信息对应的频谱的半高宽和频谱的波峰对应的频率的平均值分别作为第一蓝光阈值和蓝光标准频率。多个红光LED芯片、多个绿光LED芯片和多个蓝光LED芯片的频谱信息的获取方法与前述步骤中待筛选LED芯片的频谱信息的获取方法相同，在此不再赘述。
在一具体实施方式中，当所述LED芯片为红光LED芯片时，所述步骤S3包括：
S311、判断所述频谱的半高宽是否小于预设的第一红光阈值，以及判断所述频谱的波峰对应的频率与红光标准频率的差值的绝对值是否小于预设的第二阈值；
S321、若所述频谱的半高宽小于预设的第一红光阈值，且所述频谱的波峰对应的频 率与红光标准频率的差值的绝对值小于预设的第二阈值，则确定所述LED芯片为待转移的LED芯片。
在一具体实施方式中，根据所述频谱信息筛选出待转移的LED芯片的步骤之前需要判断所述LED芯片的类型，即判断所述LED芯片是属于红光LED芯片、绿光LED芯片还是蓝光LED芯片。当所述LED芯片为红光LED芯片时，将频谱信息中的频谱的半高宽与预设的第一红光阈值进行比较，以及将频谱信息中频谱的波峰对应的频率与红光标准频率的差值的绝对值与预设的第二阈值进行比较，当频谱的半高宽小于预设的第一红光阈值，且频谱的波峰对应的频率与红光标准频率的差值的绝对值小于预设的第二阈值，则确定所述红光LED芯片为待转移的LED芯片。
在一具体实施方式中，当所述LED芯片为绿光LED芯片时，所述步骤S3包括：
S311＇、判断所述频谱的半高宽是否小于预设的第一绿光阈值，以及判断所述频谱的波峰对应的频率与绿光标准频率的差值的绝对值是否小于预设的第二阈值；
S321＇、若所述频谱的半高宽小于预设的第一绿光阈值，且所述频谱的波峰对应的频率与绿光标准频率的差值的绝对值小于预设的第二阈值，则确定所述LED芯片为待转移的LED芯片。
在一具体实施方式中，当所述LED芯片为绿光LED芯片时，将频谱信息中的频谱的半高宽与预设的第一绿光阈值进行比较，以及将频谱信息中的频谱的波峰对应的频率与绿光标准频率的差值的绝对值与预设的第二阈值进行比较，当频谱的半高宽小于预设的第一绿光阈值，且频谱的波峰对应的频率与绿光标准频率的差值的绝对值小于预设的第二阈值，则确定所述绿光LED芯片为待转移的LED芯片。
在一具体实施方式中，当所述LED芯片为蓝光LED芯片时，所述步骤S3包括：
S311＂、判断所述频谱的半高宽是否小于预设的第一蓝光阈值，以及判断所述频谱的波峰对应的频率与蓝光标准频率的差值的绝对值是否小于预设的第二阈值；
S321＂、若所述频谱的半高宽小于预设的第一蓝光阈值，且所述频谱的波峰对应的频率与蓝光标准频率的差值的绝对值小于预设的第二阈值，则确定所述LED芯片为待转移的LED芯片。
在一具体实施方式中，当所述LED芯片为蓝光LED芯片时，将频谱信息中的频谱的半高宽与预设的第一蓝光阈值进行比较，以及将频谱信息中的频谱的波峰对应的频率与蓝光标准频率的差值的绝对值与预设的第二阈值进行比较，当频谱的半高宽小于预设的第一蓝光阈值，且频谱的波峰对应的频率与蓝光标准频率的差值的绝对值小于预设的 第二阈值，则确定所述蓝光LED芯片为待转移的LED芯片。
在一具体实施方式中，所述步骤S3之后还包括步骤：
S4、根据所述待转移LED芯片的位置信息生成位置信息文件；
S5、根据所述位置信息文件对所述待转移LED芯片进行转移。
在一具体实施方式中，根据频谱信息筛选出待转移的LED芯片后，进一步根据待转移LED芯片或者不用转移LED芯片的位置信息生成位置信息文件，根据位置信息文件对所述待转移LED芯片进行转移。
为了更好地理解本发明的技术，本发明还提供一种具体的应用实施例，如图2中所示，具体包括如下步骤：
步骤201、接收LED芯片产生的光束；
步骤202、获取所述光束对应的频谱信息；
步骤203、判断频谱的半高宽是否小于第一阈值；若是，则执行步骤204，若否，则执行步骤206；
步骤204、判断频谱的波峰对应的频率与标准频率的差值的绝对值是否小于第二阈值；若是，则执行步骤205，若否，则执行步骤206；
步骤205、确定所述LED芯片为待转移的LED芯片；
步骤206、确定所述LED芯片不是待转移的LED芯片。
在本发明的另一实施例中，还提供上述所述待转移LED芯片的筛选方法对应的筛选装置。如图3所示，所述装置包括：探测器2，所述探测器2用于接收LED芯片1产生的光束；频谱分析仪3，所述频谱分析仪3用于对探测器2接收的光束进行频谱分析；处理器4，用于根据频谱分析仪3得到的频谱结果筛选出待转移的LED芯片1。
在一具体实施方式中，所述装置还包括电压施加器，所述LED芯片1设置在基板5上，所述电压施加器用于对所述LED芯片1施加驱动电压，使所述LED芯片1产生光束。
综上所述，本发明提供了一种待转移LED芯片的筛选方法及装置，所述方法包括步骤：接收LED芯片产生的光束；对所述光束进行频谱分析，获取所述光束对应的频谱信息；根据所述频谱信息筛选出待转移的LED芯片。本申请通过将LED芯片产生的光束对应的频谱信息与预设的阈值进行比较筛选待转移的LED芯片，筛选出的LED芯片色彩纯度合格且无色差，发光一致性高，对于RGB显示可以有效区分光均匀性好坏，进而达成显示混光色均匀性。
应当理解的是，本发明的系统应用不限于上述的举例，对本领域普通技术人员来说，可以根据上述说明加以改进或变换，所有这些改进和变换都应属于本发明所附权利要求的保护范围。

Claims (15)

  1. 一种待转移LED芯片的筛选方法，其特征在于，包括步骤：
    接收LED芯片产生的光束；
    对所述光束进行频谱分析，获取所述光束对应的频谱信息；
    根据所述频谱信息筛选出待转移的LED芯片。
  2. 根据权利要求1所述的待转移LED芯片的筛选方法，其特征在于，所述频谱信息包括频谱的半高宽和频谱的波峰对应的频率。
  3. 根据权利要求2所述的待转移LED芯片的筛选方法，其特征在于，所述根据所述频谱信息筛选出待转移的LED芯片的步骤具体包括：
    判断所述频谱的半高宽是否小于预设的第一阈值，以及判断所述频谱的波峰对应的频率与标准频率的差值的绝对值是否小于预设的第二阈值；
    若所述频谱的半高宽小于预设的第一阈值，且所述频谱的波峰对应的频率与标准频率的差值的绝对值小于预设的第二阈值，则确定所述LED芯片为待转移的LED芯片。
  4. 根据权利要求1所述的待转移LED芯片的筛选方法，其特征在于，所述接收LED芯片产生的光束的步骤之前还包括：
    对所述LED芯片施加驱动电压，使所述LED芯片产生光束。
  5. 根据权利要求3所述的待转移LED芯片的筛选方法，其特征在于，所述根据所述频谱信息筛选出待转移的LED芯片的步骤之前还包括：
    获取多个LED芯片的频谱信息，根据所述频谱信息确定所述第一阈值和所述标准频率。
  6. 根据权利要求5所述的待转移LED芯片的筛选方法，其特征在于，所述LED芯片包括红光LED芯片、绿光LED芯片和蓝光LED芯片。
  7. 根据权利要求6所述的待转移LED芯片的筛选方法，其特征在于，所述判断所述频谱的半高宽是否小于预设的第一阈值的步骤之前还包括：
    判断所述LED芯片的类型。
  8. 根据权利要求6所述的待转移LED芯片的筛选方法，其特征在于，所述第一阈值包括第一红光阈值、第一绿光阈值和第一蓝光阈值；所述标准频率包括红光标准频率、绿光标准频率和蓝光标准频率。
  9. 根据权利要求8所述的待转移LED芯片的筛选方法，其特征在于，所述获取多个LED芯片的频谱信息，根据所述频谱信息确定所述第一阈值和所述标准频率的步骤包括：
    获取多个红光LED芯片的频谱信息，根据所述频谱信息确定所述第一红光阈值和所述红光标准频率；
    获取多个绿光LED芯片的频谱信息，根据所述频谱信息确定所述第一绿光阈值和所述绿光标准频率；
    获取多个蓝光LED芯片的频谱信息，根据所述频谱信息确定所述第一蓝光阈值和所述蓝光标准频率。
  10. 根据权利要求8所述的待转移LED芯片的筛选方法，其特征在于，当所述LED芯片为红光LED芯片时，所述根据所述频谱信息筛选出待转移的LED芯片的步骤包括：
    判断所述频谱的半高宽是否小于预设的第一红光阈值，以及判断所述频谱的波峰对应的频率与红光标准频率的差值的绝对值是否小于预设的第二阈值；
    若所述频谱的半高宽小于预设的第一红光阈值，且所述频谱的波峰对应的频率与红光标准频率的差值的绝对值小于预设的第二阈值，则确定所述LED芯片为待转移的LED芯片。
  11. 根据权利要求8所述的待转移LED芯片的筛选方法，其特征在于，当所述LED芯片为绿光LED芯片时，所述根据所述频谱信息筛选出待转移的LED芯片的步骤包括：
    判断所述频谱的半高宽是否小于预设的第一绿光阈值，以及判断所述频谱的波峰对应的频率与绿光标准频率的差值的绝对值是否小于预设的第二阈值；
    若所述频谱的半高宽小于预设的第一绿光阈值，且所述频谱的波峰对应的频率与绿光标准频率的差值的绝对值小于预设的第二阈值，则确定所述LED芯片为待转移的LED芯片。
  12. 根据权利要求8所述的待转移LED芯片的筛选方法，其特征在于，当所述LED芯片为蓝光LED芯片时，所述根据所述频谱信息筛选出待转移的LED芯片的步骤包括：
    判断所述频谱的半高宽是否小于预设的第一蓝光阈值，以及判断所述频谱的波峰对应的频率与蓝光标准频率的差值的绝对值是否小于预设的第二阈值；
    若所述频谱的半高宽小于预设的第一蓝光阈值，且所述频谱的波峰对应的频率与蓝光标准频率的差值的绝对值小于预设的第二阈值，则确定所述LED芯片为待转移的LED芯片。
  13. 根据权利要求1所述的待转移LED芯片的筛选方法，其特征在于，所述根据所述频谱信息筛选出待转移的LED芯片的步骤之后还包括：
    根据所述待转移LED芯片的位置信息生成位置信息文件；
    根据所述位置信息文件对所述待转移LED芯片进行转移。
  14. 一种待转移LED芯片的筛选装置，其特征在于，包括：
    探测器，用于接收LED芯片产生的光束；
    频谱分析仪，用于对所述光束进行频谱分析，获取所述光束对应的频谱信息；
    处理器，用于根据所述频谱信息筛选出待转移的LED芯片。
  15. 根据权利要求14所述的待转移LED芯片的筛选装置，其特征在于，还包括：
    电压施加器，用于对所述LED芯片施加驱动电压，使所述LED芯片产生光束。
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