US 12,358,426 B2
Light emitting device
Yu-Chia Huang, Miao-Li County (TW); Hong-Sheng Hsieh, Miao-Li County (TW); and Tsung-Han Tsai, Miao-Li County (TW)
Assigned to InnoLux Corporation, Miao-Li County (TW)
Filed by InnoLux Corporation, Miao-Li County (TW)
Filed on Oct. 22, 2023, as Appl. No. 18/382,527.
Claims priority of application No. 202211466190.7 (CN), filed on Nov. 22, 2022.
Prior Publication US 2024/0166124 A1, May 23, 2024
Int. Cl. B60Q 3/12 (2017.01); B60Q 3/18 (2017.01)
CPC B60Q 3/12 (2017.02) [B60Q 3/18 (2017.02)] 16 Claims
OG exemplary drawing
 
1. A light emitting device configured to emit an output light having a distribution of luminance, comprising:
a light adjustment structure,
wherein the output light is adjusted by the light adjustment structure, a sub light is defined as the output light corresponding to an azimuth angle, a first value L1 is a sum of a luminance of the sub light corresponding to a polar angle from 115 degrees to 125 degrees, a second value L2 is a sum of a luminance of the sub light corresponding to a polar angle from 95 degrees to 105 degrees, a third value L3 is a sum of a luminance of the sub light corresponding to a polar angle from 75 degrees to 85 degrees, a fourth value L4 is a sum of a luminance of the sub light corresponding to a polar angle from 55 degrees to 65 degrees, and the first value L1, the second value L2, the third value L3 and the fourth value L4 satisfy following relations:
L3<L2; and
1.23≤(L1*L3)/(L2*L4)≤2.92.