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Micro led and display device including same

A technology of LED chips and organic dyes, applied in lighting devices, chemical instruments and methods, electroluminescent light sources, etc., can solve problems such as low luminous efficiency, and achieve high color purity, high brightness, and improved durability

Active Publication Date: 2021-04-16
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem with inorganic phosphors is that inorganic phosphors need to be used in large quantities due to low luminous efficiency, and a separate reflective layer needs to be formed inside a separate partition wall to avoid color mixing

Method used

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  • Micro led and display device including same
  • Micro led and display device including same
  • Micro led and display device including same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] The organic dye layer for realizing green light having a thickness of 5 μm was formed by the following process: a layer containing polymethyl methacrylate (PMMA), 0.5 wt % of the BODIPY-based green organic dye based on the weight of the PMMA, and 5 wt % of titanium dioxide were formed. (TiO 2 ), and a solution of butyl acetate were bar coated on a blue micro LED chip (manufactured by LG Innotek Co., Ltd., 50 μm×30 μm).

Embodiment 2

[0099] The organic dye layer for realizing red light with a thickness of 5 μm was formed by the following process: a BODIPY-based orange organic dye containing polymethyl methacrylate (PMMA), 0.2 wt % based on the weight of PMMA, 0.1 wt % based on BODIPY's red organic dye and 5 wt% titanium dioxide (TiO 2 ), and a solution of butyl acetate bar coated on a green micro LED chip (manufactured by LG Innotek Co., Ltd., 50 μm×30 μm).

Embodiment 3

[0101] The organic dye layer for realizing red light having a thickness of 5 μm was formed by the following process: a red organic dye based on BODIPY at 0.1 wt % based on the weight of PMMA, and 5 wt % of titanium dioxide was formed by polymethyl methacrylate (PMMA). (TiO 2 ), and a solution of butyl acetate bar coated on a green micro LED chip (manufactured by LG Innotek Co., Ltd., 50 μm×30 μm).

[0102] Figure 7 Luminescence intensities according to wavelengths for the microLEDs prepared in Example 2 and Example 3 are shown. Depend on Figure 7 It was confirmed that, compared to Example 3, an orange organic dye was additionally included in Example 2 to absorb the micro-LED light more efficiently and to make the red dye emit light more efficiently.

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Abstract

The specification provides a micro LED and a display device including the same, the micro LED comprising: a micro LED chip; and an organic dye layer formed on the micro LED chip, wherein the organic dye layer contains one or more organic dyes.

Description

technical field [0001] This application claims priority to and the benefit of Korean Patent Application No. 10-2017-0012617 filed with the Korean Intellectual Property Office on Jan. 26, 2017, the entire contents of which are incorporated herein by reference. [0002] This specification relates to microLEDs and display devices including the same. Background technique [0003] LEDs are devices that convert electrical energy into light energy by utilizing the semiconductor properties of compounds, and recently, such micro-LEDs have been studied as materials for flexible devices in which by overcoming the properties of inorganic materials when the LED chips are bent due to the The disadvantage of fragmentation is that by reducing the size of the LED chip to a micro size, the degree of freedom of design is increased. [0004] In addition, micro LEDs have an advantage that power consumption can be reduced by minimizing the loss of light generated by pixels, because by driving ea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/58C09B57/00H01L33/50H05B33/12
CPCC09B57/00H01L33/50H01L33/58H05B33/12H01L2924/12041
Inventor 李东郁权赫勇
Owner LG CHEM LTD
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