Patent ID: 6448900
Filing Date: 2002-09-10
Classification: G09F,Y10S

Abstract:
An easy-to-assemble LED display driven by a simple circuit for any graphics and text by utilizing a plurality of LED display elements with built-in resistors directly installed on a display with power to light up the LED elements and display texts or graphics, allowing the user compose different texts or graphics by arranging at will the LED display elements with built-in resistors on a specific circuit, which LED display comprises:a matrix display module, wherein the circuit of said module is a matrix base with a plurality of socket holes made by a printed circuit board covered by an upper cover and a lower cover and said upper cover has a matrix of holes in alignment with said plurality of socket holes on said base, wherein said matrix of holes are inserted with said LED display elements in the area of the text or graphics to be displayed while with resistors of comparable impedance to that of said LED display elements in the area not be lit up; a display element, which has an equal or roughly equal impedance to that of said LED display element that is formed by connecting LEDs and said built-in resistors in series; and a modularized LED display element installation circuit, which is a circuit compatible to said LED display elements wherein the impedance of each of said LED display elements is designed to be equal or roughly equal to the power supply voltage divided by the number of said LED display and the value of the driven current.