57.3: Achieving Color Balance of a Large Sized BLU Directly—Lit by LEDs Capped with Customized Optical Lenses

Chao, Paul C.-P.; Shen, Chien Yu; Chiu, Chian‐Song; Huang, Jeng-Lin; Wang, C.-L.; Chi, Solomon; Lin, Hong‐Shen; Tsai, S.-Y.

doi:10.1889/1.3069811

Cited by 1 publication

(2 citation statements)

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“…Many variations of the technique have been reported [1][2][3][4]8,[13][14][15][16][17][18]. In the case of the backlight with fluorescent lamps [ex.…”

Section: Introductionmentioning

confidence: 99%

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Design method for a thin uniform direct backlight using a diffuser plate with a pattern on the surface and optical films

2015

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We researched a design method for improving uniformity of a thin direct backlight by using a diffuser plate with a pattern on the surface. It was found that the transmittance angle distribution (TAD) of the diffuser plate indicated the performance for uniformity and was an essential physical quantity for a backlight optical system with the diffuser plate. We clarified the relationship between the design parameters of the diffuser plate (the pattern and the mean free path of a ray in the diffuser plate) and the TAD of the diffuser plate by a simulation based on Mie theory and the experiments. The direct backlight, in which the distance between the diffuser plate and the lamps was less than 5 mm, was demonstrated. The illuminance uniformity of the diffuser plate was improved to 0.98 by the diffuser plate with a pattern that makes the TAD nearly constant distribution. Furthermore, the optical films on the diffuser plate were optimized, and the illuminance uniformity of the backlight achieved 0.99.

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“…Many variations of the technique have been reported [1][2][3][4]8,[13][14][15][16][17][18]. In the case of the backlight with fluorescent lamps [ex.…”

Section: Introductionmentioning

confidence: 99%

“…A lens technique has been researched for improving uniformity in LED backlights [13,16]. A lens mounted on a LED module changes an emitted light angle distribution and makes the distribution wider to improve a illuminance uniformity of a diffuser plate.…”

Section: Introductionmentioning

confidence: 99%