ASSEMBLED LAMP PANEL MODULE

摘要

PURPOSE:To provide a color LED assembled lamp panel facilitating a brightness adjustment. CONSTITUTION:An (a) is the example of the circuit of assembled lamps and shows a case that one pixel 10 is constituted by using four blue LEDs, three green LEDs and two red LEDs. Four blue LEDs are made to be an independent circuit so as to be enargized differently from other LEDs and green and red LEDs are made to be an anode-common circuit. LEDs are arranged into a matrix as shown in a (b). The color-mixture of colors is performed adequatly with this arrangement. A module is made by constituting a panel while arranging every 16 pixels of pixel 10 in longitudinal and lateral directions. A driving control circuit for the blue LEDs is constituted of a constant current driver because a control by a current value is convenient to control the brightness of a sutle blue color independently of other colors. Further, the control by the current value improves the quality of a product because the variation of brightness due to lots of blue LEDs can be adjusted and absorbed by the control.