CN-122015037-A - Color conversion component for light emitting diode

Abstract

According to an embodiment of the present invention, a color conversion member for an LED includes a color conversion portion formed in a plate shape that converts and passes a color of light emitted from the LED, a light reflection portion that covers a side surface of the color conversion portion and reflects light traveling toward the side surface of the color conversion portion, and a light absorption portion that covers an outside of the light reflection portion and absorbs light transmitted through the light reflection portion. The color conversion portion, the light reflection portion, and the light absorption portion are integrally formed, and the light emission surface forms a flat plate-like structure. The light reflecting portion reflects light traveling toward the side of the color converting portion, and the light absorbing portion removes light traveling laterally, thereby improving the straightness of the emitted light.

Inventors

• Li Xingmen
• Lin Zhaiji
• JIN CHUNMIN
• HE ZONGYOU

Assignees

• 罗茨股份有限公司

Dates

Publication Date

20260512

Application Date

20241125

Priority Date

20241112

Claims (6)

1. 1.A color conversion member for a light emitting diode, comprising: a color conversion part formed in a plate shape that converts and passes a color of light emitted from the light emitting diode; a light absorbing portion that covers an outer side of the light reflecting portion and is formed at an outer periphery of the light reflecting portion and absorbs light transmitted through the light reflecting portion; The color conversion portion, the light reflection portion, and the light absorption portion are integrally formed, and the light emission portion is in a flat plate shape, the light reflection portion reflects light traveling toward the side face of the color conversion portion, and the light absorption portion removes light traveling laterally, thereby improving straightness of the emitted light.
2. 2. The color conversion member for a light-emitting diode according to claim 1, wherein a side surface of the color conversion portion is an inclined structure, the light reflection portion is a film-like structure covering the inclined side surface of the color conversion portion, the light absorption portion is a rectangular frame structure, an inner side surface is an inclined structure, and an outer side surface is parallel to a light traveling direction, thereby forming a rectangular flat plate-like structure as a whole.
3. 3. The color conversion member for a light emitting diode according to claim 1, wherein a side surface of the color conversion portion forms an inclined structure within a depth and the remaining portion is parallel to a light traveling direction, the light reflection portion is a film-like structure covering the side surface of the color conversion portion and is formed partially inclined in the light traveling direction and partially parallel thereto similarly to the color conversion portion, the light absorption portion is a rectangular frame structure, a portion of an inner side surface is an inclined structure and the remaining portion is parallel to the light traveling direction, and an outer side surface is parallel to the light traveling direction, thereby forming a rectangular flat plate-like structure as a whole.
4. 4. The color conversion member for a light-emitting diode according to claim 1, wherein the light reflection portion is made of any one of aluminum, silver, gold, copper, chromium, titanium oxide, or cerium oxide, and is formed in a film form by attaching it to the color conversion portion by vapor deposition.
5. 5. The color conversion member for a light-emitting diode according to claim 1, wherein the light absorbing portion is composed of a mixture of glass and carbon powder, and liquid glass and carbon powder are mixed and cured.
6. 6. The color conversion member for a light-emitting diode according to claim 1, wherein the light absorbing portion is made of chromium oxide or nichrome and is coated outside the light reflecting portion by vapor deposition.

Description

Color conversion component for light emitting diode Technical Field The present invention relates to a color conversion member for a Light Emitting Diode (LED). And more particularly, to a color conversion member for a light emitting diode, which is mounted in front of a light emitting diode chip and radiates by changing the wavelength of light emitted from the light emitting diode. Background With the increase of application devices such as multi-beam light emitting diodes for automotive headlamps, compact light emitting diodes are arranged in plurality and controlled to individually blink. Since each of the small light emitting diodes can blink independently, it is essential to improve light straightness and light quality of each light emitting diode. In Japanese patent No. 7117127, a light-emitting device is disclosed which comprises a substrate, a light-emitting element provided on the substrate, and a wavelength conversion member provided on the light-emitting element. The wavelength conversion member covers an entire upper surface of the light emitting element and has an upper surface smaller than a bottom surface, a side surface shape whose width gradually becomes smaller in a direction parallel to the substrate as it extends from the bottom surface to the upper surface, and a first cover member covering a side surface of the wavelength conversion member and an inner side surface second cover member covering an entire side surface of the light emitting element and extending from a bottom surface periphery of the wavelength conversion member toward the upper surface. The first cover member and the second cover member have different light absorptances, the first cover member is filled between the second cover member and the wavelength conversion member, and an inner side surface of the second cover member extends from a bottom surface periphery of the wavelength conversion member toward the upper surface in a direction perpendicular to the substrate. Disclosure of Invention Technical problem The present invention is directed to a color conversion member for a light emitting diode, which has high straightness, smooth surface, and small size, and is free from cracks or broken edges, thereby being capable of improving the light quality of the light emitting diode. Means for solving the problems The color conversion member for the light emitting diode according to the embodiment of the invention includes a plate-shaped color conversion part which converts and passes through the color of light emitted by the light emitting diode, a light reflection part which covers the side surface of the color conversion part and reflects light propagating toward the side surface of the color conversion part, and a light absorption part which covers the outside of the light reflection part and absorbs light passing through the light reflection part. The color conversion section, the light reflection section, and the light absorption section are integrally formed to form a plate-like structure having a flat light emission surface, the light reflection section reflects light traveling toward the side surface of the color conversion section, and the light absorption section removes light traveling toward the side surface, thereby improving the straightness of the emitted light. The side surface of the color conversion part can be obliquely formed, the light reflection part is of a membranous structure and covers the side surface of the oblique color conversion part, the light absorption part is of a rectangular frame structure, the inner side surface of the light absorption part is of an oblique structure, and the outer side surface of the light absorption part is parallel to the light travelling direction, so that a rectangular flat plate structure is integrally formed. The light reflection part is of a membranous structure and covers the side face of the color conversion part, and is similar to the color conversion part, part of the light reflection part is inclined along the light traveling direction and part of the light reflection part is parallel to the light traveling direction, the light absorption part is of a rectangular frame structure, part of the inner side face is of an inclined structure, the rest of the inner side face is parallel to the light traveling direction, and the outer side face is parallel to the light traveling direction, so that the whole rectangular flat plate structure is formed. The light reflecting part is made of any one of aluminum, silver, gold, copper, chromium, titanium dioxide or cerium oxide, and is attached to the color conversion part in an evaporation manner to form a membranous structure. The light absorbing part is formed by mixing glass and carbon powder, and is prepared by mixing liquid glass and carbon powder and solidifying. The light absorbing part may be made of chromium oxide or nichrome, and is coated on the outer side of the light reflecting part by vapor deposition. Effec