Direct type back light device and display apparatus having the same

• Main Authors: KIM HYUNG SUK, LEE YOUNG MIN, JEON DUK JIN, KIM JONG BIN, CHO BYOUNG JIN, CHOI SUK JU
• Format: Patent
• Language: English; Korean
• Published: 29.04.2021
• Subjects: BLASTING; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; LIGHTING; MECHANICAL ENGINEERING; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; WEAPONS

A direct-type backlight device according to the present invention comprises a lower chassis, a reflective sheet installed on the bottom of the lower chassis, and a plurality of LED bars installed on the upper surface of the reflective sheet; each of the plurality of LED bars comprises a bar-shaped printed circuit board installed on the upper surface of the reflective sheet, a plurality of LEDs installed on the upper surface of the printed circuit board, and a reflective member provided on the upper surface of the printed circuit board; and a reflectance of the reflective member is 90% or more of the reflectance of the reflective sheet. Therefore, the present invention enables productivity to be improved. 본 발명에 의한 직하형 백라이트장치는, 하부 샤시와, 하부 샤시의 바닥에 설치되는 반사시트, 및 반사시트의 상면에 설치되는 복수의 엘이디 바(LED bar);를 포함하며, 복수의 엘이디 바는 각각, 반사시트의 상면에 설치되는 바 형상의 인쇄회로기판과, 인쇄회로기판의 상면에 설치되는 복수의 엘이디, 및 인쇄회로기판의 상면에 마련되는 반사부재를 포함하며, 반사부재의 반사율은 반사시트의 반사율의 90% 이상이다.