Color-convertible flip LED chip and manufacturing method thereof

Abstract

The invention discloses a color-convertible flip LED chip and a manufacturing method thereof. The chip comprises a substrate and a light-emitting structure arranged on the front surface of the substrate. A groove is formed in the back surface of the substrate, and the groove is filled with quantum dots. A filtering layer is arranged on the groove, and the filtering layer covers the quantum dots and filters light waves passing through the quantum dots. Light formed by passing through the corresponding quantum dots is emitted from the filtering layer, and light of colors except the quantum dotsis reflected back to one side of the light-emitting structure by the filtering layer, so that no stray light is mixed into the corresponding quantum dots. By filling the groove with the quantum dots of different colors on the same chip, full-color display and single-color display can be achieved. The chip only needs one light-emitting structure, light of different colors can be obtained after light emitted by the same light-emitting structure passes through the quantum dots of different colors, and the size of the display screen is thus reduced.

Description

technical field [0001] The invention relates to the technical field of light-emitting diodes, in particular to a color-switchable flip-chip LED chip and a manufacturing method thereof. Background technique [0002] The LED full-color screen uses red, green, and blue three-color light-emitting tubes, and each tube has 256 gray levels to form 16,777,216 colors. The full-color LED display system adopts the latest LED technology and control technology, which makes the full-color LED display lower in price, more stable in performance, lower in power consumption, higher in unit resolution, more realistic and rich in color, and more time-consuming when forming a system. Fewer electronic components result in lower failure rates. [0003] A display made by putting red and green LEDs together as a pixel is called a two-color screen or a color screen; a display that uses red, green, and blue LED tubes together as a pixel is called a three-color screen or a full-color screen. [0004]...

AI Technical Summary

Problems solved by technology

If the display screen is to achieve full-color display, flip-chip LED chips of three colors of red, blue, and green or flip-chip LED chips of more colors are required for matching and packaging, and the packaging volume is larger, which is difficult to meet the market demand for small full-color displays. screen needs

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