Optical film, backlight module and display device

• Main Authors: WU JUNYI, LAI JUNHAO, ZHONG YUANZHEN, CHEN WEIXUAN, DAI YONGHUI
• Format: Patent
• Language: Chinese; English
• Published: 14.04.2023
• 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

The invention discloses an optical film (2), a backlight module and a display device. The optical film (2) comprises a base material layer (21) and a plurality of optical adhesive layers (22) stacked on the base material layer (21). The optical adhesive layer (22) is provided with at least two layers and mutually filled microstructures, in the optical adhesive layer (22), the optical adhesive layer close to the base material layer (21) is a first optical adhesive layer (22a), the optical adhesive layer far away from the base material layer (21) is a second optical adhesive layer (22b), the refractive index of the first optical adhesive layer (22a) is smaller than that of the second optical adhesive layer (22b), and at least the microstructures of the second optical adhesive layer (22b) have acute angles. By means of the arrangement of the optical adhesive layer (22), the contrast of light intensity can be reduced, and the uniform brightness can be improved. 一种光学膜片(2)、背光模组及显示装置，光学膜片(2)包含基材层(21)，及叠置于基材层(21)上的多个