Array substrate, display panel and display device

• US 10,642,112 B2
• Filed: 12/21/2018
• Issued: 05/05/2020
• Est. Priority Date: 02/06/2018
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Im, Yunsik, Kim, Seoyoon, Um, Yoonsung, Liu, Liwei, Zhang, Hui, Zhang, Shiyu, Zhu, Ming, Niu, Haijun
• Primary Examiner(s): Patel, Vip
• Application Number:
  US16/229,141
• Publication Number:
  US 20190243176A1
• Time in Patent Office: 501 Days
• Field of Search: None
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133553 Reflecting elements associated to illuminating devices G02F1/133605
• CPC Class Codes: G02F 1/13362 providing polarized light, e.g. by converting a polarisation component into another one
• CPC Class Codes: G02F 1/133621 providing coloured light G02F1/133617, G02F1/133533 take precedence
• CPC Class Codes: G02F 1/1362 Active matrix addressed cells G02F1/134336, G02F1/134363 take precedence
• CPC Class Codes: G02F 1/136222 Colour filters incorporated in the active matrix substrate
• CPC Class Codes: G02F 2203/02 reflective
• CPC Class Codes: G02F 2203/055 wavelength filtering

Abstract

An array substrate includes a base substrate and a selective reflective layer. The selective reflective layer on the base substrate, and includes at least one selective reflective unit. The selective reflective unit is configured to reflect light of a first wavelength range and transmit light of a second wavelength range other than the first wavelength range.

Claims

1. An array substrate, comprising:

a base substrate; and

a selective reflective layer on the base substrate;

wherein the selective reflective layer comprises at least one selective reflective unit;

the at least one selective reflective unit is configured to reflect light of a first wavelength range and transmit light of a second wavelength range,

wherein the selective reflective units comprise a plurality of first dielectric layers and a plurality of second dielectric layers, which are alternately stacked, and the refractive index of the first dielectric layer is greater than the refractive index of the second dielectric layer, and the number of the first dielectric layers is larger than the number of the second dielectric layer by one.

2. The array substrate according to claim 1, wherein the selective reflective units comprise at least one of a green selective reflective unit, a blue selective reflective unit, and a red selective reflective unit, wherein the green selective reflective unit is configured to reflect green light and transmit red light and blue light, and the blue selective reflective unit is configured to reflect blue light and transmit red light and green light, and the red selective reflective unit is configured to reflect red light and transmit green light and blue light.

3. The array substrate according to claim 1, wherein the first dielectric layer is an Al₂O₃ layer and the second dielectric layer is a SiO₂ layer, wherein both the thickness of the first dielectric layer and the thickness of the second dielectric layer are a quarter of the first wavelength range.

4. A display panel, comprising:

an array substrate, comprising a base substrate and a selective reflective layer on the base substrate, wherein the selective reflective layer comprises at least one selective reflective unit, the selective reflective unit is configured to reflect light of a first wavelength range and transmit light of a second wavelength range, and

a color film substrate arranged opposite to the array substrate,

wherein the selective reflective units comprise a plurality of first dielectric layers and a plurality of second dielectric layers, which are alternately stacked, and the refractive index of the first dielectric layer is greater than the refractive index of the second dielectric layer, and the number of the first dielectric layers is larger than the number of the second dielectric layer by one.

5. The display panel according to claim 4, wherein the color film substrate comprises a plurality of red filter units, a plurality of green filter units, and a plurality of blue filter units.

6. The display panel according to claim 5, wherein the selective reflective layer comprises a plurality of green selective reflective units,

projections of the plurality of red filter units and the plurality of blue filter units on the base substrate in a direction of light emitting are respectively overlapped with projections of the green reflective units.

7. The display panel according to claim 6, wherein the selective reflective layer further comprises a plurality of red selective reflective units or a plurality of blue selective reflective units, projections of the plurality of green filter units in a direction of light emitting on the base substrate are respectively overlapped with projections of the red reflective units and/or the blue reflective units.

8. The display panel according to claim 5, wherein the selective reflective layer comprises a plurality of red selective reflective units, wherein the red selective reflective units are configured to reflect red light and transmit green light and blue light, projections of the plurality of green filter units and the plurality of blue filter units in a direction of light emitting on the base substrate are respectively overlapped with projections of red reflective unit.

9. The display panel according to claim 8, wherein the selective reflective layer further comprise a plurality of green selective reflective units or a plurality of blue selective reflective units, wherein the green selective reflective unit is configured to reflect green light and transmit red light and blue light, and the blue selective reflective unit is configured to reflect blue light and transmit red light and green light, projections of the plurality of red filter units in a direction of light emitting on the base substrate are respectively overlapped with projections of the green reflective units and/or the blue reflective units.

10. The display panel according to claim 5, wherein the selective reflective layer comprises a plurality of blue selective reflective units, and the blue selective reflective unit is configured to reflect blue light and transmit red light and green light, projections of the plurality of green filter units and the plurality of red filter units in a direction of light emitting on the base substrate are respectively overlapped with projections of the blue reflective units.

11. The display panel according to claim 10, wherein the selective reflective layer further comprise a plurality of green selective reflective unit or a plurality of red selective reflective unit, wherein the green selective reflective unit is configured to reflect green light and transmit red light and blue light, the red selective reflective unit is configured to reflect red light and transmit green light and blue light, projections of the plurality of blue filter units in a direction of light emitting on the base substrate are respectively overlapped with projections of green reflective units and red reflective units.

12. The display panel according to claim 4, wherein the selective reflective layer is arranged between the base substrate and the color film substrate, and wherein the display panel further comprises a first polarizer positioned on one side of the base substrate away from the color film substrate.

13. The display panel according to claim 5, wherein the selective reflective layer is arranged between the base substrate and the color film substrate, and wherein the display panel further comprises a first polarizer positioned between the selective reflective layer and the color film substrate.

14. The display panel according to claim 4, wherein the selective reflective layer is arranged between the base substrate and the color film substrate, and wherein the display panel further comprises a wire grid polarization layer positioned between the selective reflective layer and the color film substrate.

15. The display panel according to claim 5, wherein the display panel further comprises a second polarizer, the second polarizer is arranged on one side of the color film substrate away from the selective reflective layer.

17. The display panel according to claim 6, wherein the selective reflective layer further comprises a plurality of red selective reflective units and a plurality of blue selective reflective units, projections of the plurality of green filter units in a direction of light emitting on the base substrate are respectively overlapped with projections of the red reflective units and/or the blue reflective units.

18. The display panel according to claim 8, wherein the selective reflective layer further comprise a plurality of green selective reflective units and a plurality of blue selective reflective units, wherein the green selective reflective unit is configured to reflect green light and transmit red light and blue light, and the blue selective reflective unit is configured to reflect blue light and transmit red light and green light, projections of the plurality of red filter units in a direction of light emitting on the base substrate are respectively overlapped with projections of the green reflective units and/or the blue reflective units.

19. The display panel according to claim 10, wherein the selective reflective layer further comprise a plurality of green selective reflective unit and a plurality of red selective reflective unit, wherein the green selective reflective unit is configured to reflect green light and transmit red light and blue light, the red selective reflective unit is configured to reflect red light and transmit green light and blue light, projections of the plurality of blue filter units in a direction of light emitting on the base substrate are respectively overlapped with projections of green reflective units and red reflective units.

16. A display device, comprising:

a display panel, comprising an array substrate and a color film substrate, wherein the array substrate comprises a base substrate and a selective reflective layer on the base substrate, wherein the selective reflective layer comprises at least one selective reflective unit, and the at least one selective reflective unit is configured to reflect light a first wavelength range and transmit light of a second wavelength range, and the selective reflective unit comprises at least one of a green selective reflective unit, a blue selective reflective unit, and a red selective reflective unit, and wherein the green selective reflective unit is configured to reflect green light and transmit red light and blue light, and the blue selective reflective unit is configured to reflect blue light and transmit red light and green light, and the red selective reflective unit is configured to reflect red light and transmit green light and blue light, and the color film substrate is arranged opposite to the array substrate and comprises a plurality of red filter units, a plurality of green filter units, and a plurality of blue filter units,

a backlight source; and

a brightness enhancement film,

wherein the backlight source is arranged on one side of the array substrate away from the selective reflective layer, and the brightness enhancement film is arranged between the backlight source and the base substrate,

wherein the selective reflective units comprise a plurality of first dielectric layers and a plurality of second dielectric layers, which are alternately stacked, and the refractive index of the first dielectric layer is greater than the refractive index of the second dielectric layer, and the number of the first dielectric layers is larger than the number of the second dielectric layer by one.