Full-Color Led Display Panel And Method For Manufacturing Same

Patent metadata

Field	Value
Publication number	US-2020373350-A1
Application number	US-202016993498-A
Country	US
Kind code	A1
Filing date	Aug 14, 2020
Priority date	Feb 15, 2018
Publication date	Nov 26, 2020
Grant date	—

Abstract

A full-color LED display panel includes an LED array substrate 1 in which multiple LEDs 4 are arranged in a matrix form on a wiring board 5, each LED 4 emitting light in an ultraviolet or blue wavelength band; multiple fluorescent layers 2 configured to perform wavelength conversion by being excited by excitation light EL emitted from a corresponding LED 4 and by emitting fluorescence FL of a corresponding color, each fluorescent layer 2 being provided on at least one corresponding LED 4 for red, green, or blue color, and containing, in a dispersed manner, a fluorescent colorant 14 and an adjustment colorant 15 that selectively transmits light in a predetermined wavelength band; and a light shielding member 3 that reflects or absorbs excitation light EL and fluorescence FL, and is provided between the fluorescent layers 2.

First claim

What is claimed is:

1 . A full-color LED display panel comprising:
an LED array substrate in which multiple LEDs are arranged in a matrix form on a wiring board, each LED emitting light in an ultraviolet or blue wavelength band; multiple fluorescent layers configured to perform wavelength conversion by being excited by excitation light emitted from a corresponding LED and by emitting fluorescence of a corresponding color, each fluorescent layer being provided on at least one corresponding LED for red, green, or blue color, and containing, in a dispersed manner, a fluorescent colorant and an adjustment colorant that selectively transmits light in a predetermined wavelength band; and a light shielding member that reflects or absorbs excitation light and fluorescence, and is provided between the fluorescent layers.

2 . The full-color LED display panel according to claim 1 , wherein the multiple fluorescent layers are formed in an island pattern and made of a fluorescent resist containing the fluorescent colorant and the adjustment colorant, which are dispersed in a photosensitive resin.

3 . The full-color LED display panel according to claim 2 , wherein the light shielding member is deposited on a peripheral face of each fluorescent layer of the multiple fluorescent layers, which is other than a light emitting surface of the fluorescent layer.

4 . The full-color LED display panel according to claim 1 , wherein the light shielding member is a metal film that reflects excitation light and fluorescence.

5 . A method for manufacturing the full-color LED display panel, the method comprising:
in a first step, arranging multiple LEDs in a matrix form on a wiring board to form an LED array substrate, each LED emitting light in an ultraviolet or blue wavelength band; in a second step, forming multiple fluorescent layers configured to perform wavelength conversion by being excited by excitation light emitted from a corresponding LED and by emitting fluorescence of a corresponding color, each fluorescent layer being provided on at least one corresponding LED for red, green, or blue color, and containing, in a dispersed manner, a fluorescent colorant and an adjustment colorant that selectively transmits light in a predetermined wavelength band; and in a third step, providing, between the fluorescent layers, a light shielding member that reflects or absorbs excitation light and fluorescence.

6 . The method for manufacturing the full-color LED display panel, according to claim 5 , wherein, in the second step, the multiple fluorescent layers are formed in an island pattern, by exposing and developing a fluorescent resist containing the fluorescent colorant and the adjustment colorant, which are dispersed in a photosensitive resin.

7 . The method for manufacturing the full-color LED display panel, according to claim 6 , wherein, in the third step, the light shielding member is deposited on a peripheral face of each fluorescent layer of the multiple fluorescent layer, which is other than a light emitting surface of the fluorescent layer.

8 . The method for manufacturing the full-color LED display panel, according to claim 5 , wherein the light shielding member is a metal film that reflects excitation light and fluorescence.

Assignees

• V Tech Co Ltd

Inventors

• Kajiyama Koichi
• Suzuki Yoshikazu
• Hirano Takafumi

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• G09F9/335

  being organic light emitting diodes [OLED] · CPC title

• H10H20/0363

  of optical field-shaping means · CPC title

• H10H20/0361

  of wavelength conversion means · CPC title

• H10H20/034

  of coatings · CPC title