Fingerprint identification display device

• US 10,503,952 B2
• Filed: 07/19/2017
• Issued: 12/10/2019
• Est. Priority Date: 08/02/2016
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Wang, Haisheng, Dong, Xue, Lv, Jing, Wu, Chun Wei, Liu, Yingming, Ding, Xiaoliang
• Primary Examiner(s): Baker, Charlotte M
• Application Number:
  US15/743,130
• Publication Number:
  US 20190102593A1
• Time in Patent Office: 874 Days
• Field of Search: 382124, 2502081, 345175
• CPC Class Codes: G06F 18/00 Pattern recognition
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0421 by interrupting or reflecting a light beam, e.g. optical touch-screen
• CPC Class Codes: G06V 40/1318 using electro-optical elements or layers, e.g. electroluminescent sensing

Abstract

A fingerprint identification display device includes: a display panel; a light guide plate arranged on a light emitting surface of the display panel; a light emitting component configured to emit modulated light; and a plurality of photosensitive induction units arranged in an array and arranged below the light guide plate, in which the modulated light is transmitted between the light guide plate and the display panel in a total reflection mode.

Claims

1. A fingerprint identification display device, comprising:

a display panel;

a light guide plate arranged on a light emitting surface of the display panel;

a light emitting component configured to emit modulated light; and

a plurality of photosensitive induction units arranged in an array and arranged below the light guide plate, wherein the modulated light is transmitted between the light guide plate and the display panel in a total reflection mode.

2. The fingerprint identification display device according to claim 1, wherein each of the photosensitive induction unit comprises a photosensitive diode and a control switching transistor, the photosensitive diode is configured to sense the modulated light reflected by a ridge of a fingerprint, and the control switching transistor is configured to control the photosensitive diode to convert the modulated light into a potential and output the potential.

3. The fingerprint identification display device according to claim 2, further comprising:

identification scanning lines and recognition output lines, wherein the identification scanning lines are configured to load identification scanning signals to the control switching transistor, and the recognition output lines are configured to load a negative bias to the photosensitive diode by the control switching transistor, or the recognition output lines are configured to read electrical signals output by the photosensitive diode.

4. The fingerprint identification display device according to claim 3, wherein each of the identification scanning lines corresponds to each row of the photosensitive induction units in a one-to-one manner, each of the recognition output lines corresponds to each column of the photosensitive induction units in a one-to-one manner;

or

each of the identification scanning lines corresponds to each column of the photosensitive induction units in a one-to-one manner, each of the recognition output lines corresponds to each row of the photosensitive induction units in a one-to-one manner.

5. The fingerprint identification display device according to claim 1, wherein each of the photosensitive induction units, each of the identification scanning lines and each of the recognition output lines are arranged in the display panel.

6. The fingerprint identification display device according to claim 5, wherein each of the photosensitive induction units, each of the identification scanning lines and each of the recognition output lines are arranged in a region covered by a black matrix in the display panel.

7. The fingerprint identification display device according to claim 1, wherein each of the photosensitive induction units, each of the identification scanning lines and each of the recognition output lines are arranged on a surface of the light guide plate close to the display panel.

8. The fingerprint identification display device according to claim 7, further comprising, a transparent reflection film, wherein the transparent reflection film is disposed on the surface of the light guide plate close to the display panel and arranged between the light guide plate and each of the photosensitive induction units, and a refractive index of the transparent reflection film is smaller than a refractive index of the light guide plate.

9. The fingerprint identification display device according to claim 8, wherein the transparent reflection film is made of inorganic material.

10. The fingerprint identification display device according to claim 1, wherein the light guide plate is a protective cover plate which is arranged above the display panel.

11. The fingerprint identification display device according to claim 10, wherein the protective cover plate has a groove structure at a frame facing a side of the display panel, and the light emitting component is in the groove structure.

12. The fingerprint identification display device according to claim 1, further comprising a protective cover plate arranged on the display panel, wherein the light guide plate is arranged between the display panel and the protective cover plate.

13. The fingerprint identification display device according to claim 12, wherein the light emitting component is arranged at at least two sides of the light guide plate opposite to each other.

14. The fingerprint identification display device according to claim 11, further comprising a blocking component arranged on the light emitting component, wherein a positive projection of the blocking component on the display panel covers at least a portion of a positive projection of the light emitting component.

15. The fingerprint identification display device according to claim 14, wherein the positive projection of the blocking component on the display panel covers a whole positive projection of the light emitting component.

16. The fingerprint identification display device according to claim 1, wherein the light emitting component is an OLED light source or a LED light source for emitting modulated infrared light or modulated visible light.

17. The fingerprint identification display device according to claim 2, wherein each of the photosensitive induction units, each of the identification scanning lines and each of the recognition output lines are arranged in the display panel.

18. The fingerprint identification display device according to claim 2, wherein each of the photosensitive induction units, each of the identification scanning lines and each of the recognition output lines are arranged on a surface of the light guide plate close to the display panel.

19. The fingerprint identification display device according to claim 2, wherein the light guide plate is a protective cover plate which is arranged above the display panel.

20. The fingerprint identification display device according to claim 13, further comprising a blocking component arranged on the light emitting component, wherein a positive projection of the blocking component on the display panel covers at least a portion of a positive projection of the light emitting component.