Granted Patent B2

US 12,376,474 · App. 17/894,376 · Granted Jul 29, 2025

Inventor: Takumi Sano (Tokyo, JP)

Assignee: Magnolia White Corporation

H10K59/60H10K50/865H10K59/131H10K77/111

Abstract

Claims (40)

1. An electronic device comprising a first flexible substrate and a second flexible substrate overlapping the first flexible substrate,

the first flexible substrate comprising:

a first insulating base comprising first island portions and first strip portions connecting the first island portions;

first electrical elements placed on the first island portions, respectively; and

first lines placed on the first strip portions, respectively,

the second flexible substrate comprising:

a second insulating base comprising second island portions and second strip portions connecting the second island portions;

second electrical elements placed on the second island portions, respectively; and

second lines placed on the second strip portions, respectively.

2. The electronic device of claim 1 , wherein

the first electrical elements are light-emitting elements which emit light, and

the second electrical elements are photoreceivers which detect light.

3. The electronic device of claim 2 , further comprising an optical member overlapping the second flexible substrate, wherein

the optical member comprises light-transmitting portions overlapping the second electrical elements and a light-blocking portion surrounding the light-transmitting portions.

4. The electronic device of claim 3 , wherein

the optical member is placed between the first flexible substrate and the second flexible substrate.

5. The electronic device of claim 1 , wherein

the first electrical elements are arranged at a first pitch, and

the second electrical elements are arranged at a second pitch larger than the first pitch.

6. The electronic device of claim 3 , wherein

the second electrical elements are arranged at a second pitch, and

the light-transmitting portions are arranged at a third pitch smaller than the second pitch.

7. The electronic device of claim 3 , wherein

the light-blocking portion has a modulus of elasticity less than the modulus of elasticity of the light-transmitting portions.

8. The electronic device of claim 7 , wherein

the modulus of elasticity of the light-blocking portion is less than the moduli of elasticity of the first flexible substrate and the second flexible substrate.

9. The electronic device of claim 1 , wherein

the moduli of elasticity of the first flexible substrate and the second flexible substrate are equal to each other.

10. The electronic device of claim 1 , further comprising a first elastic member and a second elastic member, wherein

the first flexible substrate is located between the first elastic member and the second elastic member.

11. The electronic device of claim 10 , wherein

the first elastic member and the second elastic member contact each other in an area where the first island portions and the first strip portions are not provided.

12. The electronic device of claim 10 , wherein

the moduli of elasticity of the first elastic member and the second elastic member are less than the modulus of elasticity of the first insulating base.

13. The electronic device of claim 1 , further comprising a third elastic member and a fourth elastic member, wherein

the second flexible substrate is located between the third elastic member and the fourth elastic member.

14. The electronic device of claim 13 , wherein

the third elastic member and the fourth elastic member contact each other in an area where the second island portions and the second strip portions are not provided.

15. The electronic device of claim 13 , wherein

the moduli of elasticity of the third elastic member and the fourth elastic member are less than the modulus of elasticity of the second insulating base.

Assignments (2)

Priority Claims (1)

Continuity (2)

References Cited (29)