Title:
PLZT DISPLAY DEVICE
Document Type and Number:
Japanese Patent JPH03215818
Kind Code:
A
Abstract:
PURPOSE:To uniformize the brightness of a light diffusing plate and to obtain a display screen which is free from a brightness irregularity on the whole by forming plural grooves on the reverse surface side of the light diffusing plate from the center part to the end part of a back light in parallel with the back light so that the width and depth are increased gradually toward their end parts. CONSTITUTION:On the reverse surface side of the light diffusing plate 4, pairs of grooves 7a - 7e, i.e. 10 grooves in total are provided. Those groove 7a - 7e extend in parallel with a fluorescent tube and the two grooves 7a and 7a at the center part are narrowest and shallow and are increased in width and depth toward their end parts. Those grooves uniformized the brightness, which is improved by about 20%.
Inventors:
MATSUMURA NOBUTOMO
Application Number:
JP1001490A
Publication Date:
September 20, 1991
Filing Date:
January 19, 1990
Export Citation:
Assignee:
FUJITSU GENERAL LTD
International Classes:
G02F1/055; G09F9/30; (IPC1-7): G02F1/055; G09F9/30
Attorney, Agent or Firm:
Takuya Ohara