Three-primary-color display unit, three-primary-color lamp bead, and three-primary-color mixing method

Abstract

The invention relates to a three-primary-color display unit, a three-primary-color lamp bead, and a three-primary-color mixing method. A green and a blue LED are arranged in parallel. A red LED is connected in series with the group composed of the green and blue LEDs and the three primary colors, red, green and blue, are superimposed into white light or color light. In a white light mode, the red,green, and blue LEDs are turned on simultaneously, so that the sum of a first current value flowing through the green LED and a second current value flowing through the blue LED is equal to a third current value flowing through the red LED. In a color mode, the on-state periods of the red, green, and blue LEDs are overlapped, and the on-state time lengths of the red, green, and blue LEDs are setto be the same or different.

Description

technical field [0001] The present invention mainly relates to the field of display, more precisely, it relates to providing a corresponding three-primary-color display unit, three-primary-color lamp beads and a three-primary-color color mixing method in an illumination or display scene containing solid-state light-emitting diodes. Background technique [0002] In the field of lighting display, pulse dimming is to change the time width of the light-emitting diode on or off within a certain period of time and consider that the current flowing through the light-emitting diode during the on-lighting period is a fixed value, thereby realizing the brightness change. According to Grassmann's law and the standard chromaticity diagram of the International Commission on Luminescence and Illumination, the reference color components of pixels need to be allocated in a predetermined intensity range in lighting and display systems, and all colors that the visual system can perceive can de...

AI Technical Summary

Problems solved by technology

In fact, red, green and blue light-emitting diodes require different operating voltages and luminous efficiencies. Applying the same power supply voltage to red, green and blue light-emitting diodes without screening will result in low efficiency and short life of some light-emitting diodes. , which is the disadvantage brought by the inherent circuit topology and package type of the traditional red, green and blue three-in-one lamp beads

Images