Fluid detection panel with filter structure and fluid detection device with filter structure

Patent metadata

Field	Value
Publication number	US-11255790-B2
Application number	US-201916632668-A
Country	US
Kind code	B2
Filing date	Jan 8, 2019
Priority date	Jan 8, 2019
Publication date	Feb 22, 2022
Grant date	Feb 22, 2022

Abstract

A fluid detection panel and a fluid detection device are disclosed. The fluid detection panel includes a fluid-driven substrate, a filter structure and a sensor. The filter structure is configured to filter light emitted by a light source; the fluid-driven substrate comprises a detection area, and is configured to enable a liquid sample to move to the detection area; the sensor is configured to receive light which is emitted by the light source and sequentially passes the filter structure and the detection area.

First claim

What is claimed is:

1. A fluid detection panel, comprising:
a filter structure, configured to filter light emitted by a light source;
a fluid-driven substrate, which comprises a detection area and is configured to enable a liquid sample to move to the detection area; and
a sensor, configured to receive light which is emitted by the light source and firstly passes the filter structure and then passes the detection area,
wherein the detection area comprises a plurality of sub-detection areas, a distance between adjacent sub-detection areas is greater than a size of each of the plurality of sub-detection areas in a same direction, and no liquid sample is located in a region corresponding the distance between adjacent sub-detection areas,
wherein the filter structure is configured to reflect at least part of light that is emitted by the light source and within a pre-determined wavelength range, and to transmit light that is emitted by the light source and outside of the pre-determined wavelength range.

2. The fluid detection panel according to claim 1 , wherein the fluid-driven substrate comprises a plurality of driving electrodes, and
the plurality of driving electrodes are configured to be able to drive the liquid sample to move to the detection area.

3. The fluid detection panel according to claim 1 , further comprising the light source, wherein the filter structure is between the light source and the detection area.

4. The fluid detection panel according to claim 3 , wherein
the filter structure comprises a plurality of sub-filter structures; and
an orthographic projection of each of the plurality of sub-filter structures on the fluid-driven substrate overlaps one of the plurality sub-detection areas.

5. The fluid detection panel according to claim 4 , wherein the light source comprises a plurality of sub-light sources, and
each of the plurality of sub-light sources is configured to emit light towards one of the plurality sub-detection areas.

6. The fluid detection panel according to claim 5 , wherein at least one of the plurality of sub-filter structures comprises a liquid crystal layer and control electrodes; and
the control electrodes are configured to receive a driven voltage signal, so as to control a peak transmission wavelength of the at least one of the plurality of sub-filter structures.

7. The fluid detection panel according to claim 6 , wherein, in a direction perpendicular to the fluid-driven substrate, the control electrodes are at a single side of the liquid crystal layer or at two sides of the liquid crystal layer.

8. The fluid detection panel according to claim 6 , further comprising a light shielding pattern, wherein the light shielding pattern is between adjacent two sub-filter structures of the plurality of sub-filter structures.

9. The fluid detection panel according to claim 6 , further comprising a control device,
wherein the control device is configured to apply the driven voltage signal to the control electrodes, and is configured to enable adjacent sub-light sources to emit light at different time.

10. The fluid detection panel according to claim 5 , wherein the filter structure further comprises a filter; and
the filter and the at least one of the plurality of sub-filter structures are stacked with each other, so as to filter light emitted by a sub-light source, or to filter light that passes and exited from at least one of the sub-filter structures.

11. The fluid detection panel according to claim 1 , wherein the filter structure comprises a plurality of sub-detection areas;
and
an orthographic projection of each of the plurality of sub-filter structures on the fluid-driven substrate overlaps one of the plurality sub-detection areas.

12. The fluid detection panel according to claim 11 , wherein at least one of the plurality of sub-filter structures comprises a grating; and
a period of the grating is smaller than a wavelength of light within the pre-determined wavelength range.

13. The fluid detection panel according to claim 12 , wherein at least two sub-filter structures in the plurality of sub-filter structures are configured to reflect beams of light within different wavelength ranges.

14. The fluid detection panel according to claim 12 , wherein the sub-filter structure further comprises an optical waveguide structure; and
the grating is on a surface of the optical waveguide structure facing toward the fluid-driven substrate.

15. The fluid detection panel according to claim 14 , wherein the optical waveguide structure is configured to leak at least part of light that enters the optical waveguide structure and is within the pre-determined wavelength range, and allow leaked light to interfere with light that is reflected by the sub-filter structure and within the pre-determined wavelength range, so as to enhance the light that is reflected by the sub-filter structure and within the pre-determined wavelength range.

16. The fluid detection panel according to claim 14 , further comprising a first light shielding structure and a second light shielding structure,
wherein the first light shielding structure is between the fluid-driven substrate and the optical waveguide structure, and an orthographic projection of the first light shielding structure on the optical waveguide structure does not overlap with the grating; and
the second light shielding structure is at a side of the optical waveguide structure away from the grating.

17. The fluid detection panel according to claim 1 , further comprising the light source, wherein the light source is between the filter structure and the sensor.

18. A fluid detection device, comprising:
a signal processing device, and
a fluid detection panel, wherein the signal processing device is connected with the sensor of the fluid detection panel, and the fluid detection panel comprises:
a filter structure, configured to filter light emitted by a light source;
a fluid-driven substrate, which comprises a detection area and is configured to enable a liquid sample to move to the detection area; and
a sensor, configured to receive light which is emitted by the light source and firstly passes the filter structure and then passes the detection area,

wherein the detection area comprises a plurality of sub-detection areas, a distance between adjacent sub-detection areas is greater than a size of each of the plurality of sub-detection areas in a same direction, and no liquid sample is located in a region corresponding the distance between adjacent sub-detection areas,
wherein the filter structure is configured to reflect at least part of light that is emitted by the light source and within a pre-determined wavelength range, and to transmit light that is emitted by the light source and outside of the pre-determined wavelength range.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Meng Xianqin
• Wang Wei
• Chen Xiaochuan
• Meng Xiandong
• Wang Fangzhou
• Ling Qiuyu
• Tian Yishan
• Liu Peilin

Classifications

• G01N21/31

  Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry {(G01N21/72 takes precedence)} · CPC title

• G01N21/63 Primary

  optically excited · CPC title

• G01N21/255 Primary

  Details, e.g. use of specially adapted sources, lighting or optical systems · CPC title

• G02F2203/055

  wavelength filtering · CPC title

• B01L3/502715

  characterised by interfacing components, e.g. fluidic, electrical, optical or mechanical interfaces · CPC title