Texture recognition device and display panel

1. A texture recognition device, comprising: a substrate, an optical sensing layer, and a light-blocking structure,

wherein the optical sensing layer and the light-blocking structure are stacked on the substrate;

the light-blocking structure comprises a plurality of light transmission hole groups, at least one of the plurality of light transmission hole groups comprises C 2 light transmission holes, and C is a positive integer;

the optical sensing layer comprises a plurality of optical sensing groups; and

the plurality of optical sensing groups corresponds to the plurality of light transmission hole groups respectively, an orthogonal projection of one optical sensing group of the plurality of optical sensing groups on the substrate completely covers an orthogonal projection of a corresponding light transmission hole group of the plurality of light transmission hole groups on the substrate, and an orthogonal projection of a center of the optical sensing group on the substrate coincides with an orthogonal projection of a center of the corresponding light transmission hole group on the substrate,

wherein the optical sensing layer is arranged on a first side of the substrate and the light-blocking structure is arranged on a second side of the substrate, wherein the first side and the second side are arranged opposite to each other,

in a direction from the light-blocking structure to the optical sensing layer, the light-blocking structure comprises at least three light-blocking layers and light transmission layers each disposed between adjacent light-blocking layers of the at least three light-blocking layers, wherein each of the C 2 light transmission holes runs through the at least three light-blocking layers.

2. The texture recognition device according to claim 1 , wherein

(

C

-

1

)

×

s

+

d

+

2

⁢

⁢

h

×

tan

⁢

θ

2

≤

C

×

s

≤

K

,

and

⁢

⁢

p

=

C

×

s

,

wherein d denotes an aperture size of each of the C 2 transmission holes, h denotes a distance between the light-blocking structure and the optical sensing layer, θ denotes a light convergence angle, s denotes a distance between centers of two adjacent light transmission holes of the C 2 light transmission holes, p denotes a distance between centers of two adjacent optical sensing groups of the plurality of optical sensing groups, and K is a constant and denotes a minimum distance between the centers of two adjacent optical sensing groups in a case where there is a plurality of optical sensing elements per inch and each of the plurality of optical sensing groups comprises at least one optical sensing element.

3. The texture recognition device according to claim 1 , wherein a distance s between centers of two adjacent light transmission holes of the C 2 light transmission holes satisfies:

s

=

p

C

;

wherein p denotes a distance between centers of two optical sensing groups of the plurality of optical sensing groups.

4. The texture recognition device according to claim 3 , wherein an aperture size d of each of the C 2 light transmission holes satisfies:

d

=

p

-

(

C

-

1

)

×

s

-

2

⁢

h

×

tan

⁢

θ

2

,

wherein h denotes a distance between the light-blocking structure and the optical sensing layer, and θ denotes a light convergence angle.

5. The texture recognition device according to claim 1 , wherein at least one of the plurality of optical sensing groups comprises one optical sensing element.

6. A display panel, comprising: a luminescent device and the texture recognition device according to claim 1 ,

wherein the luminescent device comprises a light emission side and a backlight side arranged opposite to the light emission side, the texture recognition device is arranged on the backlight side of the luminescent device, and the light-blocking structure is arranged at a side of the optical sensing layer close to the luminescent device.

7. The display panel according to claim 6 , wherein

(

C

-

1

)

×

s

+

d

+

2

⁢

⁢

h

×

tan

⁢

θ

2

≤

C

×

s

≤

K

,

and

⁢

⁢

p

=

C

×

s

,

wherein d denotes an aperture size of each of the C 2 transmission holes, h denotes a distance between the light-blocking structure and the optical sensing layer, θ denotes a light convergence angle, s denotes a distance between centers of two adjacent light transmission holes of the C 2 light transmission holes, p denotes a distance between centers of two adjacent optical sensing groups of the plurality of optical sensing groups, and K is a constant and denotes a minimum distance between the centers of two adjacent optical sensing groups in a case where there is a plurality of optical sensing elements per inch and each of the plurality of optical sensing groups comprises at least one optical sensing element.

8. The display panel according to claim 6 , wherein a distance s between centers of two adjacent light transmission holes of the C 2 light transmission holes satisfies:

s

=

p

C

;

wherein p denotes a distance between centers of two optical sensing groups of the plurality of optical sensing groups.

9. The display panel according to claim 8 , wherein an aperture size d of each of the C 2 light transmission holes satisfies:

d

=

p

-

(

C

-

1

)

×

s

-

2

⁢

h

×

tan

⁢

θ

2

,

wherein h denotes a distance between the light-blocking structure and the optical sensing layer, and θ denotes a light convergence angle.

10. The display panel according to claim 6 , wherein at least one of the plurality of optical sensing groups comprises one optical sensing element.

11. The display panel according to claim 6 , further comprising a thin film transistor disposed on the substrate, wherein a drain of the thin film transistor is electrically connected to an anode layer of the luminescent device.

12. The display panel according to claim 11 , wherein the optical sensing layer and the light-blocking structure are both arranged on a side of the thin film transistor away from the luminescent device.

13. The display panel according to claim 6 , wherein the self-luminous display panel is an organic light-emitting diode (OLED) display panel or a quantum dot display panel.