Patent ID: 12016229

Abstract:
In EL display panels fabricated by vapor deposition, a vapor-deposition fine mask is employed to form red, green, and blue pixels. An issue, however, has been that misregistration of the vapor-deposition fine mask occurs, lowering manufacturing yields. To resolve this issue, on a thin-film transistor (TFT) substrate, red, green, and blue pixel electrodes are fashioned in matrix form. The TFT substrate is conveyed into a vapor-deposition chamber. Under a vacuum, an organic evaporation source is employed to codeposit a light-emitting layer composed of a host material and a red guest material on the TFT substrate display screen. An ultraviolet laser beam generated by a laser device is optically guided into the vapor-deposition chamber through a laser window and directed on the light-emitting layer formed onto the green and blue pixel electrodes. Positional selecting on the green and blue pixels is carried out by controlling a mirror galvanometer.