公开(公告)号：JPH02131222A

公开(公告)日：1990-05-21

申请号：JP28620288

申请日：1988-11-11

Applicant: MATSUSHITA ELECTRIC IND CO LTD ,  NISSHA PRINTING

Inventor： YAMAMOTO OSAMU ,  KOYABU SHINYA ,  KIZAKI NOBUYUKI ,  YAMAMOTO KUNITOSHI ,  FUKUSHIMA YUTAKA ,  IWATA TORAYOSHI

IPC: G02B5/02 ,  G02F1/1335 ,  G02F1/13357 ,  G09F9/00

Abstract: PURPOSE:To uniform the brightness of the display surface of a display without any irregularity by arranging only a light diffusing plate where a light absorbing layer above a light source. CONSTITUTION:The panel 3 for the surface light emitting device is constituted by forming the light absorbing layer 2 which has an area distribution proportional to an illuminance distribution on the reverse surface of the light diffusing plate 1. Then, part of light emitted by the light source 5 enters the light diffusion plate 1 through gaps between patterns of the light absorbing layer 2 nearby the light source 5 and the majority of the light is absorbed by the light absorbing layer 2. The majority of the light emitted by the light source 5 enters the light diffusing plate 1 through the gaps between patterns of the light absorbing layer 2 at a distance from the light source 5 and part of the light is absorbed by the light absorbing part 2. The quantity of the light is small nearby the light source 5 and increased at the distance from the light source 5 to scatter the light in the light diffusing plate 1. Consequently, uniform surface light emission is realized on the surface of the panel 3.

公开(公告)号：JPH0239124A

公开(公告)日：1990-02-08

申请号：JP19118288

申请日：1988-07-29

Applicant: NISSHA PRINTING

Inventor： YAMAMOTO KUNITOSHI ,  FUKUSHIMA YUTAKA ,  IWATA TORAYOSHI

IPC: G02F1/1335 ,  G02F1/13357 ,  G09F9/00

Abstract: PURPOSE:To illuminate a pattern formed on a display with uniform brightness by arranging a panel constituted by forming a reflection layer having area distribution approximately proportional to the distribution of illuminance on the back of a light diffusion plate on the upper part of a light source. CONSTITUTION:The panel for face light emitting device is constituted, so that the reflection layer 2 having the area distribution approximately proportional to the distribution of illuminance is formed on the back of the diffusion plate 1. The light source 5 is arranged on the back of the panel 4 and a part of light projecting from the light source 5 is made incident upon the plate 1 through a gap between the patterns of the reflection layer 2, and while being scattered in the plate 1, arrives at the surface of the panel 4. The other part of the light projecting from the light source 5 is repeatedly reflected between the inside of the face light emitting device and the reflection layer 2 and then made incident upon the plate 1 through a gap between the patterns of the layer 2. While being scattered in the plate 1, the incident light arrives at the surface of the panel 4. Consequently, uniform face light emission with uniform illuminance can be attained.

公开(公告)号：JPH0239123A

公开(公告)日：1990-02-08

申请号：JP19118188

申请日：1988-07-29

Applicant: NISSHA PRINTING

Inventor： FUKUSHIMA YUTAKA ,  IWATA TORAYOSHI ,  YAMAMOTO KUNITOSHI

IPC: G02F1/1335 ,  G02F1/13357 ,  G09F9/00

Abstract: PURPOSE:To uniformly illuminate a pattern formed on a display with uniform brightness by arranging a panel constituted by forming a reflection layer having area distribution approximately proportional to the distribution of illuminance on the rear face to a light diffusion plate through an adhesive layer on the upper part of a light source. CONSTITUTION:The panel 4 for face light emitting device is constituted so that the reflection layer 2 having area distribution approximately proportional to the distribution of illumination is formed on the rear face of the light diffusion plate 1. The light source 5 is arranged on the rear face of the panel 4 and a part of light projected from the light source 5 is made incident upon the plate 1 through a gap between the patterns of the reflection layer 2, and while being scattered in the plate 1, arrives at the surface of the panel 4. The other part of light projected from the light source 5 is made incident between the plate 1 and the layer 2, scattered in the layer 3, then made incident upon the plate 1. While being scattered in the plate 1, the incident light arrives at the surface of the panel 4 to show uniform face light emission. Consequently, uniform face light emission with uniform illuminance can be attained.

公开(公告)号：JPS63231301A

公开(公告)日：1988-09-27

申请号：JP6519187

申请日：1987-03-19

Applicant: NISSHA PRINTING

Inventor： YAMAMOTO KUNITOSHI ,  SAGARA MASAMI ,  FUKUSHIMA YUTAKA

IPC: G02B5/00 ,  G09F13/04

Abstract: PURPOSE:To improve the uniformity of the panel light emission of an illumination plate by decreasing the thickness of a printing film and the occupying area rate per unit area gradually with a decrease in the luminance of the light from a light source from the part where the luminance of the light is high. CONSTITUTION:The light transmittable printing film 2 is formed nearly to a circular shape to face the halogen lamp 4 on the surface of a transparent plate 1. The printing film 2 is formed to the large thickness in the central part facing the lamps 4 to suppress the luminance of the light transmitting therethrough. The thickness of the printing film 2 is decreased successively from the central part toward the circumferential part to allow the transmission of the luminance of the light from the lamps 4 as it is. The occupying area rate per unit area of the printing films 2 with respect to the transparent plate 1 is increased in the central part of the printing film 2 and is decreased toward the circumferential part to change the transmittance. The panel light emission of the illuminating plate 6 is uniformized by such constitution.

公开(公告)号：JPS612552A

公开(公告)日：1986-01-08

申请号：JP12430384

申请日：1984-06-15

Applicant: NISSHA PRINTING

Inventor： YAMAMOTO KUNITOSHI ,  IWATA TORAYOSHI ,  MORI KOUJI

IPC: B32B3/14 ,  B32B15/08 ,  H01F5/00 ,  H01F41/04