Display Device and Mobile Information Terminal Including the Same

1. A display device comprising: a display panel configured to receive touch by a user's finger on a display area of the display panel, wherein the display panel has a width and a length, the width being perpendicular to the length; and a fingerprint sensor coupled to the display panel configured to sense light reflected from a fingerprint of the user's finger, wherein the light reflected from the fingerprint is incident on the fingerprint sensor through the display panel, the fingerprint sensor having a length; and a flexible circuit board on which the fingerprint sensor is mounted, wherein the flexible circuit board includes: a sensor mounting portion on which the fingerprint sensor is mounted; and a tail portion connected to the sensor mounting portion, wherein the tail portion of the flexible circuit board includes: a first tail portion positioned close to the sensor mounting portion; and a second tail portion bent from the first tail portion at a predetermined angle, wherein the fingerprint sensor and the sensor mounting portion of the flexible circuit board are disposed at an angle of 20° to 45° to a reference line, wherein the first tail portion is connected to the sensor mounting portion and is extended at an angle of 20°to 45° to the reference line, wherein the fingerprint sensor is attached obliquely on the display panel such that the length of the fingerprint sensor is at a predetermined angle to a the reference line parallel to a long axis of the display panel, and the fingerprint sensor and the display panel are in a same plane.

2. The display device of claim 1, wherein the predetermined angle is an angle of 20° to 45° to the reference line.

3. The display device of claim 1, further comprising a flexible circuit board on which the fingerprint sensor is mounted, wherein the flexible circuit board includes: a sensor mounting portion on which the fingerprint sensor is mounted; and a tail portion connected to the sensor mounting portion.

4. The display device of claim 3 1, wherein an attachment direction line of the fingerprint sensor passes through a center of the fingerprint sensor and a center of a width direction of the flexible circuit board and intersects the reference line, wherein an angle of the attachment direction line of the fingerprint sensor with respect to the reference line is 20° to 45°.

5. The display device of claim 3, wherein the tail portion of the flexible circuit board includes: a first tail portion positioned close to the sensor mounting portion; and a second tail portion bent from the first tail portion at a predetermined angle.

6. The display device of claim 5 1, wherein the fingerprint sensor and the sensor mounting portion of the flexible circuit board are disposed at an angle of 20° to 45° to the reference line, wherein the first tail portion is connected to the sensor mounting portion and is extended at an angle of 20° to 45° to the reference line, wherein the second tail portion is bent from the first tail portion at an angle of 110° to 135°.

7. The display device of claim 3, A display device comprising: a display panel configured to receive touch by a user's finger on a display area of the display panel, wherein the display panel has a width and a length, the width being perpendicular to the length; and a fingerprint sensor coupled to the display panel configured to sense light reflected from a fingerprint of the user's finger, wherein the light reflected from the fingerprint is incident on the fingerprint sensor through the display panel, the fingerprint sensor having a length; and a flexible circuit board on which the fingerprint sensor is mounted, wherein the flexible circuit board includes: a sensor mounting portion on which the fingerprint sensor is mounted; and a tail portion connected to the sensor mounting portion, wherein the fingerprint sensor and the sensor mounting portion of the flexible circuit board are disposed at an angle of 20° to 45° to the a reference line, wherein the tail portion is connected to the sensor mounting portion and is bent from the sensor mounting portion at an angle of 110° to 135°, wherein the fingerprint sensor is attached obliquely on the display panel such that the length of the fingerprint sensor is at a predetermined angle to the reference line parallel to a long axis of the display panel, and the fingerprint sensor and the display panel are in a same plane.

8. The display device of claim 5, wherein the fingerprint sensor and the sensor mounting portion of the flexible circuit board are disposed at an angle of 20° to 45° to the reference line, wherein the first tail portion is extended parallel to the reference line, wherein the second tail portion is bent from the first tail portion at an angle of 90°.

9. The display device of claim 3, wherein the fingerprint sensor is disposed at an angle of 20° to 45° to the reference line, wherein one side of the sensor mounting portion of the flexible circuit board is parallel to the reference line, wherein a long axis of the tail portion of the flexible circuit board is perpendicular to the reference line.

10. The display device of claim 1, wherein pixels of the fingerprint sensor are arranged non-uniformly.

11. The display device of claim 1, further comprising: a foam pad and a metal layer disposed on a side of the display panel where the fingerprint sensor is coupled with, wherein the fingerprint sensor is disposed in a hole of the metal layer, or disposed in a hole of the metal layer and the foam pad.

12. A mobile information terminal comprising: a display panel configured to receive touch by a user's finger on a display area of the display panel, wherein the display panel has a width and a length, the width being perpendicular to the length; a fingerprint sensor coupled to the display panel configured to sense light reflected from a fingerprint of the user's finger, wherein the light reflected from the fingerprint is incident on the fingerprint sensor through the display panel, the fingerprint sensor having a length; a main board connected to the fingerprint sensor; and a battery connected to the main board, wherein the fingerprint sensor is attached obliquely at on the display panel such that the length of the fingerprint sensor is at a predetermined angle to a reference line parallel to a long axis of the display panel, and the fingerprint sensor and the display panel are in a same plane, wherein the battery includes a groove accommodating a flexible circuit board on which the fingerprint sensor is mounted.

13. The mobile information terminal of claim 12, wherein the predetermined angle is an angle of 20° to 45° to the reference line.

14. The mobile information terminal of claim 12, further comprising a flexible circuit board on which the fingerprint sensor is mounted, wherein the flexible circuit board includes: a sensor mounting portion on which the fingerprint sensor is mounted; and a tail portion connected to the sensor mounting portion and connected to the main board.

15. The mobile information terminal of claim 14, wherein an attachment direction line of the fingerprint sensor passes through a center of the fingerprint sensor and a center of a width direction of the flexible circuit board and intersects the reference line, wherein an angle of the attachment direction line of the fingerprint sensor with respect to the reference line is 20° to 45°.

16. The mobile information terminal of claim 14, wherein the battery includes a groove accommodating a flexible circuit board on which the fingerprint sensor is mounted.

17. The mobile information terminal of claim 12, wherein pixels of the fingerprint sensor are arranged non-uniformly.

18. The display device of claim 1, further comprising: a foam pad and a metal layer disposed on a side of display panel where the fingerprint sensor is coupled with, wherein the fingerprint sensor is disposed in a hole of the metal layer or disposed in a hole of the metal layer and the foam pad.

19. The mobile information terminal of claim 12, wherein the fingerprint sensor is attached to a rear surface of the display panel at a location overlapping a fingerprint sensing region of the display panel such that the fingerprint sensor is opposite to the fingerprint sensing region on a screen of the display panel, wherein display pixels from a plurality of display pixels that are included in the fingerprint sensing region of the display panel are configured to emit light responsive to an event requiring fingerprint recognition.

20. The mobile information terminal of claim 12, further comprising: a foam pad and a metal layer disposed on a side of the display panel where the fingerprint sensor is coupled with, wherein the fingerprint sensor is disposed in a hole of the metal layer or disposed in a hole of the metal layer and the foam pad.