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US 11,237,438 B2Granted
Display substrate, fabricating method thereof, and display apparatus
AssigneesFuzhou Boe Optoelectronics Technology Co., Ltd., Boe Technology Group Co., Ltd.
InventorsXinmao Qiu, Zongxiang Li, Jin Wang, Yao Liu, Min Zhou, Hao Cheng, Zuwen Liu
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Abstract
The present disclosure relates to a display substrate. The display substrate may include a base substrate, a light filtering layer on the base substrate, a plurality of light blocking grooves in the light filtering layer, and a plurality of light blocking strips in the plurality of light blocking grooves respectively. The plurality of light blocking strips may be configured to block light from viewing angles outside a visible range of the display substrate.
Claims15
A display substrate, comprising:
- a base substrate,
- a light filtering layer on the base substrate,
- a plurality of light blocking grooves in the light filtering layer, and
- a plurality of light blocking strips in the plurality of light blocking grooves respectively,
- wherein the plurality of light blocking, strips are configured to block light from viewing angles outside a visible range of the display substrate;
- the light filtering layer is transparent, and the display substrate further comprises a sub-wavelength grating layer, the sub-wavelength grating layer comprises a plurality of grating units having at least two patterns, each of the patterns of the grating units is configured to selectively transmit light of a color band, and different patterns of the grating units allow light of different color bands to transmit;
- and
- the plurality of grating grooves are spaced apart on a surface of the light filtering layer opposite from the substrate, and each of the grating units comprises a plurality of fourth grating strips and a plurality of fifth grating strips, the fourth grating strips are correspondingly disposed in the grating grooves, and the fifth grating strips are correspondingly disposed on surfaces of the light filtering layer between two adjacent grating grooves.
5 more elements
A method of fabricating a display substrate, comprising:
- providing a base substrate;
- forming a light filtering layer on the base substrate;
- performing a first patterning process on the light filtering layer, thereby forming a plurality of light blocking grooves in the light filtering layer;
- covering the light filtering layer with a layer of light blocking material, wherein a portion of the light blocking material is filled into the light blocking grooves;
- and
- removing the layer of light blocking material outside the light blocking grooves, thereby forming a plurality of light blocking strips;
- wherein the light filtering layer is transparent;
- the method further comprises forming a sub-wavelength grating layer, the sub-wavelength grating layer comprises a plurality of grating units, the plurality of grating units comprises at least two patterns, each of the patterns of the grating units is configured to selectively transmit light of a color band, and different patterns of the grating units allow light of different color bands to transmit;
- and
- wherein forming the sub-wavelength grating layer comprises:
- forming a plurality of grating grooves on a surface of the light filtering layer between adjacent light blocking grooves during the first patterning process to the light filtering layer to form the plurality of light blocking grooves;
- filling a portion of the light blocking material in the grating grooves during covering the light filtering layer with the layer of light blocking material;
- removing the light blocking material in the grating grooves during removing the layer of the light blocking material outside the light blocking grooves;
- and
- covering the light filtering layer with a layer of sub-wavelength material after removing the light blocking material, thereby forming the sub-wavelength layer comprising a plurality of grating units.
12 more elements
Dependencies are inferred from the claim text.