DIRECT TYPE BACK LIGHT DEVICE AND DISPLAY APPARATUS HAVING THE SAME

• Main Authors: CHOI SUK-JU, LEE YOUNG-MIN, KIM HYONG-SOK, JEON DUK-JIN, KIM JONG-BIN, CHO BYOUNG-JIN
• Format: Patent
• Language: Chinese; English
• Published: 07.05.2021
• Subjects: CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; 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; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FREQUENCY-CHANGING; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; PRINTED CIRCUITS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

The invention discloses a direct type back light device and a display apparatus having the same. The direct type backlight device includes a lower chassis, a reflective sheet disposed on a bottom portion of the lower chassis, and a plurality of light emitting diode (LED) bars disposed on an upper surface of the reflective sheet. Each of the plurality of LED bars includes a bar-shaped printed circuit board disposed on the upper surface of the reflective sheet, a plurality of LEDs disposed on an upper surface of the printed circuit board, and a reflective member provided on the upper surface of the printed circuit board. A reflectance of the reflective member is at least 90% of a reflectance of the reflective sheet. 公开了一种直下式背光装置和具有该背光装置的显示设备。根据一个实施例，直下式背光装置包括下框架、设置在下框架的底部上的反射片，以及设置在反射片的上表面上的多个发光二极管(LED)条。多个LED条中的每个都包括设置在反射片的上表面上的条形印刷电路板、设置在印刷电路板的上表面上的多个LED以及设置在印刷电路板的上表面上的反射部件。反射部件的反射率至少为反射片的反射率的90％。