Transparent Partition Light-Absorbing Layers for Display Viewing Angle Control

The light-absorbing function is segmented into separate layers (first light-absorbing layer, second light-absorbing layer, third light-absorbing layer) positioned at different heights around the transparent partitions, rather than relying on the partitions themselves to absorb light. This segmentation allows the partitions to maintain their light-transmitting function while dedicated layers handle light absorption.

The patent introduces intermediary light-absorbing layers between the transparent partitions and the display panel, as well as between the partitions and the external environment. These intermediary layers (first, second, and third light-absorbing layers) mediate the light absorption function, preventing the transparent partitions from directly absorbing light and compromising their transmission capability.

The patent employs a nested structure where the first, second, and third light-absorbing layers are arranged concentrically around the transparent partitions in sequence. Each layer surrounds the previous one, creating a nested configuration that efficiently uses space while providing multiple stages of light absorption control.

The light-absorbing layers are positioned at different vertical heights around the transparent partitions, utilizing the vertical dimension to achieve directional light control. The first layer is at a first height, the second layer at a second height, and the third layer at a third height, creating a three-dimensional arrangement that controls light emission direction without increasing planar complexity.

The first light-absorbing layer is designed with non-uniform thickness, where the thickness varies at different locations around the transparent partitions. Specifically, the first thickness at the first location is different from the second thickness at the second location, allowing localized optimization of light absorption characteristics to control light emission direction.

The patent changes the thickness parameter of the first light-absorbing layer to create non-uniformity, where the thickness at different positions (first thickness vs. second thickness) is deliberately varied. This parameter change enables the layer to absorb light more effectively in specific directions while maintaining manufacturability through standard deposition processes.

The patent uses oxygen plasma to form the third light-absorbing layer, utilizing strong oxidation to achieve uniform thickness. The oxygen plasma process provides controlled oxidation that creates a uniform layer while the subsequent annealing process helps mitigate any surface damage.

The patent performs annealing as a preliminary or subsequent action after the oxygen plasma treatment to recover from any surface damage. The annealing process is applied to the third light-absorbing layer to relieve stress and restore surface integrity before final device assembly.