Full-spectrum white-light micro-LED (light-emitting diode) chip

A LED chip, full-spectrum technology, applied in electrical components, electric solid devices, circuits, etc., can solve problems such as complex dimming control, discontinuous spectrum, and difficult secondary light distribution design, and achieve the effect of adjustable spectrum

Pending Publication Date: 2018-03-13
GUANGDONG INST OF SEMICON IND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Utilizing existing technologies, such as blue-light chip yellow phosphor powder, ultraviolet chip blue-red-green phosphor powder, or white light mixed with blue-red-green chips, there are disadvantages such as discontinuous spectrum, low color rendering, and poor light efficiency, w

Method used

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  • Full-spectrum white-light micro-LED (light-emitting diode) chip
  • Full-spectrum white-light micro-LED (light-emitting diode) chip
  • Full-spectrum white-light micro-LED (light-emitting diode) chip

Examples

Experimental program
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Effect test

no. 1 example

[0046] see figure 1 with figure 2 , the present embodiment provides a full-spectrum white light micro-LED chip 31 , the full-spectrum white light micro-LED chip 31 includes a micro-LED array, a flake phosphor layer and a chip electrode 6 .

[0047] The micro LED chip 3 is mounted on the substrate 2 in a positive mounting structure. The micro LED array includes a substrate 2 and micro LED chips 3 arrayed on the substrate 2 . The micro LED chip 3 is a GaN violet-blue light chip with a peak wavelength range of 410nm to 470nm. The micro LED chips 3 are strip-shaped, and a plurality of micro LED chips 3 are arranged on the substrate 2 in parallel and at intervals.

[0048] In this embodiment, the number of micro-LED chips 3 is 5, and 5 micro-LED chips 3 are figure 1 They are numbered (1), (2), (3), (4) and (5) from left to right. The width of the micro LED chip 3 ranges from 50 μm to 300 μm, the length of the micro LED chip 3 ranges from 250 μm to 1500 μm, and the distance be...

no. 2 example

[0058] see Figure 5 with Image 6 , this embodiment provides a full-spectrum white light micro-LED chip 31, which is similar in structure to the full-spectrum white light micro-LED chip 31 provided in the first embodiment, the difference is that the micro-LED chip 3 in this embodiment is square .

[0059] The micro LED chip 3 is mounted on the substrate 2 in a positive mounting structure. The wavelength band of the micro LED chip 3 is 445nm to 465nm. A plurality of micro LED chips 3 are arranged on the substrate 2 in a matrix form. In this embodiment, the micro LED chips 3 are arranged in 5 rows and 5 columns, and the 25 micro LED chips 3 can be numbered according to the direction of modern writing (from left to right, from top to bottom) (1), (2), ····, (24), (25). Light up the micro-LED chips 3 numbered (1), (2), ..., (24), (25) in different combinations, and selectively excite the corresponding phosphors to achieve different full-spectrum white lights output, thereby...

no. 3 example

[0064] see Figure 7 with Figure 8 , this embodiment provides a full-spectrum white light micro-LED chip 31, which is similar in structure to the full-spectrum white light micro-LED chip 31 provided in the first embodiment, the difference is that the micro-LED chip 3 in this embodiment adopts an inverted The structural form of the device is installed on the substrate 2.

[0065] The micro-LED chips 3 are flip-chip mounted on the substrate 2 , and each micro-LED chip 3 is provided with a corresponding pad 5 , and a chip electrode 6 is provided in the pad 5 , so that the chip electrode 6 is provided under the substrate 2 . Through the chip electrode 6, the micro LED chips 3 numbered (1), (2), (3), and (5) are lit according to different combinations, and the corresponding phosphors can be selectively excited to achieve different full-spectrum white light output, thereby realizing the functions of adjustable color temperature and adjustable spectrum.

[0066] Other structures ...

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Abstract

The invention provides a full-spectrum white-light micro-LED (light-emitting diode) chip, which relates to the technical field of high-quality illumination. The full-spectrum white-light micro-LED chip comprises a micro-LED array, a flaky fluorescent powder layer and a chip electrode. The micro-LED array comprises a substrate and a micro-LED chip arranged on the substrate; the flaky fluorescent powder layer comprises a fluorescent powder layer and silica gel, the fluorescent powder layer is consistent with the size of the micro-LED chip, the fluorescent powder layer is smeared onto the surfaceof the micro-LED chip, and two adjacent fluorescent powder layers are isolated by adopting silica gel; and the chip electrode is led out from the micro-LED chip, and the chip electrode is used as anelectric connection end of the micro-LED chip. The full-spectrum white-light micro-LED chip is small in light emitting area, simple in secondary light distribution design, controllable in color temperature and adjustable in spectrum.

Description

technical field [0001] The invention relates to the technical field of high-quality lighting, in particular to a full-spectrum white light micro-LED chip. Background technique [0002] Micro-LED technology integrates micro-sized LED arrays on a chip in high density to achieve thinning, miniaturization and matrixing of LEDs. The distance between pixels can reach the micron level, and each pixel can be addressed, Shine alone. [0003] At present, LEDs are widely used in general lighting fields, and also in specific lighting fields, such as mine lights, projection lights, stage lights, etc. However, it is well known that daylight is the most ideal full-spectrum light source, giving people a comfortable feeling and being accepted by the public. However, lighting products with a high degree of fitting to sunlight are rarely released. Utilizing existing technologies, such as blue-light chip yellow phosphor powder, ultraviolet chip blue-red-green phosphor powder, or white light ...

Claims

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Application Information

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IPC IPC(8): H01L25/075H01L33/50
CPCH01L25/0753H01L33/505
Inventor 许毅钦陈志涛张志清吴文刚任远刘晓燕古志良
Owner GUANGDONG INST OF SEMICON IND TECH
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