(19)
(11) EP 0 206 176 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
25.11.1987 Bulletin 1987/48

(43) Date of publication A2:
30.12.1986 Bulletin 1986/52

(21) Application number: 86108122

(22) Date of filing: 13.06.1986
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 28.06.1985 JP 9924885
05.07.1985 JP 10345685

(71) Applicant: TAKIRON CO. LTD.
 ()

(72) Inventor:
  • Takeichi, Akiharu c/o TAKIRON Co. LTD.
     ()

   


(54) An optical guide matrix for a dot-matrix luminous display


(57) A matrix display board in which linear electrodes are perpendicularly arranged on opposite sides of an insulating board, with luminous elements at each electrical intersection. A masking member which is made of a material having Young's modulus not higher than 100 kg/cm2 or not lower than 5x105 kg/cm2, is joined to the surface having the luminous elements with through-holes corresponding to the luminous elements. The through-holes are shaped and/or filled with a light transmitting material having a concave portion, in order to increase luminous flux density around luminous parts.






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