Organic light emitting display panel, driving method thereof and organic light emitting display apparatus

• US 20180040675A1
• Filed: 10/18/2017
• Published: 02/08/2018
• Est. Priority Date: 04/27/2017
• Status: Active Grant

• Current Assignee: Shanghai Tianma Micro-Electronics Company Limited (Tianma Microelectronics Company Limited)
• Original Assignee: Shanghai Tianma Micro-Electronics Company Limited (Tianma Microelectronics Company Limited)
• Inventors: ZENG, Yang, Zhang, Qing, Wang, Lihua, Xie, Liang, Du, Lingxiao, Ding, Hong, Chai, Huiping, Yang, Kang, Yao, Qijun
• Granted Patent: US 10,325,967 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/0421 by interrupting or reflecting a light beam, e.g. optical touch-screen
• CPC Class Codes: G06V 40/1306 non-optical, e.g. ultrasonic or capacitive sensing
• CPC Class Codes: G06V 40/1318 using electro-optical elements or layers, e.g. electroluminescent sensing
• CPC Class Codes: G06V 40/1329 Protecting the fingerprint sensor against damage caused by the finger
• CPC Class Codes: G06V 40/1359 Extracting features related to ridge properties; Determining the fingerprint type, e.g. whorl or loop
• CPC Class Codes: H10K 50/805 Electrodes
• CPC Class Codes: H10K 50/84 Passivation; Containers; Encapsulations
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens
• CPC Class Codes: H10K 59/65 OLEDs integrated with inorganic image sensors
• CPC Class Codes: H10K 59/805 Electrodes
• CPC Class Codes: H10K 59/87 Passivation; Containers; Encapsulations

Abstract

Embodiments of the present disclosure provide a display apparatus, a fingerprint identification method thereof, and an electronic device. The display apparatus includes: an organic light emitting layer and a fingerprint identification array. The organic light emitting layer includes a plurality of organic light emitting configurations. In a fingerprint identification phase, the plurality of organic light emitting configurations are arranged to emit light according to a first light emitting lattice and shift. A distance between any two adjacent organic light emitting configurations in the first light emitting lattice is greater than or equal to a minimum crosstalk-free distance. The minimum crosstalk-free distance is a maximum radius of a covering region formed on the fingerprint identification array by the light emitted from any organic light emitting configuration and then reflected through the first surface of the cover plate.

Claims

1. A display apparatus, comprising:

a display panel and a cover plate disposed on the display panel, wherein the display panel comprises an array substrate, an organic light emitting layer disposed at one side of the array substrate facing the cover plate, and a fingerprint identification array;

the organic light emitting layer comprises a plurality of organic light emitting configurations, wherein light emerges from a first surface of the cover plate facing away from the array substrate;

wherein in a fingerprint identification phase, the plurality of organic light emitting configurations are arranged to emit light according to a first light emitting lattice, wherein the first emitting lattice comprises a plurality of organic light emitting configurations being illuminated, and the first emitting lattice shifts for each frame to be displayed;

wherein a distance between any two adjacent organic light emitting configurations in the first light emitting lattice is greater than or equal to a minimum crosstalk-free distance, wherein the minimum crosstalk-free distance is a maximum radius of a covering region formed on the fingerprint identification array by the light emitted from any organic light emitting configuration and reflected through the first surface of the cover plate.

2. The display apparatus according to claim 1, wherein the organic light emitting configurations in the first light emitting lattice form a plurality of patterns;

and an angle of each corner of a pattern with a minimum area in the plurality of patterns is not equal to 90°

.

3. The display apparatus according to claim 2, wherein the first light emitting lattice is a pentagonal light emitting lattice, and the pentagonal light emitting lattice comprises a central organic light emitting configuration and five marginal organic light emitting configurations.

4. The display apparatus according to claim 2, wherein the first light emitting lattice is a hexagonal light emitting lattice, and the hexagonal light emitting lattice comprises a central organic light emitting configuration and six marginal organic light emitting configurations.

5. The display apparatus according to claim 1, wherein the first light emitting lattice comprises first light emitting rows and second light emitting rows arranged alternately, wherein any organic light emitting configuration in the first light emitting rows and any organic light emitting configuration in the second light emitting rows are located in different columns.

6. The display apparatus according to claim 1, wherein the distance between any two adjacent organic light emitting configurations in the first light emitting lattice is equal to the minimum crosstalk-free distance.

7. The display apparatus according to claim 1, wherein for any two adjacent organic light emitting configurations located in different rows in the first light emitting lattice, a vertical distance from one organic light emitting configuration to a row in which the other organic light emitting configuration is located is smaller than the minimum crosstalk-free distance.

8. The display apparatus according to claim 7, wherein for any two adjacent organic light emitting configurations located in different columns in the first light emitting lattice, a vertical distance from one organic light emitting configuration to a column in which the other organic light emitting configuration is located is smaller than the minimum crosstalk-free distance.

9. The display apparatus according to claim 1, wherein for any two adjacent organic light emitting configurations located in different columns in the first light emitting lattice, a vertical distance from one organic light emitting configuration to a column in which the other organic light emitting configuration is located is smaller than the minimum crosstalk-free distance.

10. The display apparatus according to claim 1, wherein the organic light emitting layer successively comprises a first electrode, a light emitting functional layer and a second electrode in a direction in which the organic light emitting configurations are away from the array substrate;

wherein

L=tan θ

*H1+tan θ

*H2,

wherein L is the minimum crosstalk-free distance;

θ

is an included angle between a direction corresponding to a preset brightness of the organic light emitting configurations and a direction perpendicular to the organic light emitting layer;

H1 is a height from the first surface of the cover plate to the light emitting functional layer in the direction perpendicular to the display apparatus;

H2 is a height from the first surface of the cover plate to the fingerprint identification array in the direction vertical to the display apparatus, wherein the preset brightness is less than or equal to 10% of a brightness in the direction perpendicular to the organic light emitting layer.

11. The display apparatus according to claim 1, wherein the fingerprint identification array is disposed at a side facing away from the cover plate of the array substrate.

12. The display apparatus according to claim 1, wherein a thin film transistor array, the fingerprint identification array and the organic light emitting layer are stacked at a side of the array substrate facing the cover plate.

13. The display apparatus according to claim 1, wherein a thin film transistor array, the organic light emitting layer and the fingerprint identification array are stacked at the side of the array substrate facing the cover plate, wherein the organic light emitting layer comprises a display region and a non-display region, and a projection of the fingerprint identification array in the direction perpendicular to the display apparatus is in the non-display region of the organic light emitting layer.

14. The display apparatus according to claim 1, wherein the display panel further comprises an encapsulating glass disposed at the side of the array substrate facing the cover plate, wherein the organic light emitting layer is disposed at the side of the array substrate facing the cover plate, and wherein the fingerprint identification array is disposed at a side facing the array substrate of the encapsulating glass;

wherein the organic light emitting layer comprises a display region and a non-display region; and

wherein a projection of the fingerprint identification array in the direction perpendicular to the display apparatus is in the non-display region of the organic light emitting layer.

15. The display apparatus according to claim 1, wherein the display panel further comprises a film encapsulating layer disposed at the side of the array substrate facing the cover plate, wherein the organic light emitting layer is disposed at the side of the array substrate facing the cover plate, and wherein the fingerprint identification array is disposed at a side facing the array substrate of the film encapsulating layer;

wherein the organic light emitting layer comprises a display region and a non-display region; and

wherein a projection of the fingerprint identification array in the direction perpendicular to the display apparatus is in the non-display region of the organic light emitting layer.

16. The display apparatus according to claim 1, wherein the display panel further comprises a film encapsulating layer disposed at the side of the array substrate facing the cover plate, wherein the organic light emitting layer is disposed at the side of the array substrate facing the cover plate, and wherein the fingerprint identification array is disposed at a side of the film encapsulating layer facing away from the array substrate;

wherein the organic light emitting layer comprises a display region and a non-display region; and

wherein a projection of the fingerprint identification array in the direction perpendicular to the display apparatus is in the non-display region of the organic light emitting layer.

17. The display apparatus according to claim 11, wherein the fingerprint identification array comprises a plurality of fingerprint identification units, and wherein the plurality of fingerprint identification units and the plurality of organic light emitting configurations are correspondingly arranged respectively.

18. The display apparatus according to claim 1, wherein the display apparatus is an organic light emitting display apparatus.

19. An electronic device comprising a display apparatus, wherein the display apparatus comprises:

a display panel and a cover plate disposed on the display panel, wherein the display panel comprises an array substrate, an organic light emitting layer disposed at one side of the array substrate facing the cover plate, and a fingerprint identification array;

the organic light emitting layer comprises a plurality of organic light emitting configurations, wherein light emerges from a first surface of the cover plate facing away from the array substrate;

wherein in a fingerprint identification phase, the plurality of organic light emitting configurations are arranged to emit light according to a first light emitting lattice, wherein the first emitting lattice comprises a plurality of organic light emitting configurations being illuminated, and the first emitting lattice shifts for each frame to be displayed;

wherein a distance between any two adjacent organic light emitting configurations in the first light emitting lattice is greater than or equal to a minimum crosstalk-free distance, wherein the minimum crosstalk-free distance is a maximum radius of a covering region formed on the fingerprint identification array by the light emitted from any organic light emitting configuration and reflected through the first surface of the cover plate.

20. A fingerprint identification method of a display apparatus, wherein the display apparatus comprises:

a display panel and a cover plate disposed on the display panel, wherein the display panel comprises an array substrate, an organic light emitting layer disposed at a side of the array substrate facing the cover plate, and a fingerprint identification array;

wherein the organic light emitting layer comprises a plurality of organic light emitting configurations;

light emerges from a first surface of the cover plate facing away from the array substrate;

wherein the fingerprint identification method comprises;

in a fingerprint identification phase, controlling each of the organic light emitting configurations in the organic light emitting layer to emit light according to a first light emitting lattice, the first emitting lattice comprises a plurality of organic light emitting configurations being illuminated, and the first emitting lattice shifts for each frame to be displayed;

wherein a distance between any two adjacent organic light emitting configurations in the first light emitting lattice is greater than or equal to a minimum crosstalk-free distance, the minimum crosstalk-free distance is a maximum radius of a covering region formed on the fingerprint identification array by the light emitted from any organic light emitting configuration and then reflected through the first surface of the cover plate; and

performing, by the fingerprint identification array, fingerprint identification according to the light rays on each of the fingerprint identification units reflected through a touch body on the first surface of the cover plate.