COLOUR-CHANGING FILM, PRODUCTION METHOD FOR SAME, AND BACKLIGHT UNIT AND DISPLAY DEVICE COMPRISING SAME

• Main Authors: SHIN, Dong Mok, KIM, Nari, SEO, Joo Yeon, SON, Sehwan, SHIN, Du Hyeon, KIM, Ji Ho, AHN, Byeong In
• Format: Patent
• Language: English; French; Korean
• Published: 15.09.2016
• Subjects: ADHESIVES; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; DYES; FREQUENCY-CHANGING; GENERAL PROCESSES OF COMPOUNDING; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PHYSICS; POLISHES; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

The invention disclosed in the present specification relates to a colour-changing film comprising: a resin matrix; and an organic fluorescent body dispersed in the resin matrix. The present invention relates to a production method for the colour-changing film and to a back-light unit comprising the colour-changing film wherein said organic fluorescent body comprises a green fluorescent body having a maximum light-emitting wavelength in the range of 510 to 560 nm when irradiated with light comprising a wavelength of 450 nm, together with a red fluorescent body having a maximum light-emitting wavelength in the range of 600 to 660 nm when irradiated with light comprising a wavelength of 450 nm, and wherein: the molar ratio of the green fluorescent body and the red fluorescent body is between 5:1 and 50:1; and the colour-changing film has a light-emission peak in which the half-width within the range of 510 to 560 nm during light irradiation is no more than 50 nm, and has a light-emission peak in which the half-width within the range of 600 to 660 nm is no more than 90 nm. L'invention selon la présente description concerne un film de changement de couleur comprenant : une matrice de résine ; et un corps fluorescent organique dispersé dans la matrice de résine. La présente invention concerne un procédé de production du film de changement de couleur et une unité de rétroéclairage comprenant le film de changement de couleur, ledit corps fluorescent organique comprenant un corps fluorescent vert ayant une longueur d'onde d'émission de lumière maximum dans la plage de 510 à 560 nm lorsqu'il est exposé à une lumière comprenant une longueur d'onde de 450 nm, conjointement avec un corps fluorescent rouge ayant une longueur d'onde d'émission de lumière maximum dans la plage de 600 à 660 nm lorsqu'il est exposé à une lumière comprenant une longueur d'onde de 450 nm, et le rapport molaire du corps fluorescent vert au corps fluorescent rouge étant compris entre 5:1 et 50:1 ; et le film de changement de couleur a un pic d'émission de lumière dans lequel la demi-largeur dans la plage de 510 à 560 nm pendant une exposition lumineuse n'est pas supérieure à 50 nm, et a un pic d'émission de lumière dans lequel la demi-largeur dans la plage de 600 à 660 nm n'est pas supérieure à 90 nm. 본 명세서에 기재된 발명은 수지 매트릭스; 및 상기 수지 매트릭스 내에 분산된 유기 형광체를 포함하는 색변환 필름으로서, 상기 유기 형광체는 450nm 파장을 포함하는 광을 조사하였을 때, 510~560nm 범위 내에서 최대 발광 파장을 갖는 녹색 형광체 및 450nm 파장을 포함하는 광을 조사하였을 때, 600-660nm 범위 내에서 최대 발광 파장을 갖는 적색 형광체를 포함하고, 상기 녹색 형광체와 상기 적색 형광체의 몰비가 5:1 내지 50:1이며, 상기 색변환 필름은 광 조사시 510 내지 560 nm의 범위 내에 반치폭이 50 nm 이하인 발광 피크와, 600 내지 660 nm의 범위 내에 반치폭이 90 nm 이하인 발광 피크를 갖는 것인 색변환 필름, 이의 제조방법 및 상기 색변환 필름을 포함하는 백라이트 유닛에 관한 것이다.