DISPLAY MODULE AND USING METHOD THEREOF

• US 20190295456A1
• Filed: 02/15/2017
• Published: 09/26/2019
• Est. Priority Date: 12/09/2016
• Status: Active Grant

• Current Assignee: Shanghai OXi Technology Co., Ltd.
• Original Assignee: Shanghai OXi Technology Co., Ltd.
• Inventors: LING, Yan, ZHU, Hong
• Granted Patent: US 10,437,366 B1
• Time in Patent Office: Days
• CPC Class Codes: G06F 18/00 Pattern recognition
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/042 by opto-electronic means
• 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: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]
• CPC Class Codes: H10K 59/00 Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
• CPC Class Codes: H10K 59/65 OLEDs integrated with inorganic image sensors
• CPC Class Codes: H10K 59/8791 Arrangements for improving contrast, e.g. preventing reflection of ambient light

Abstract

Display module and using method thereof are provided. The display module includes: a self-luminous display panel including first and second substrates and a self-luminous circuit layer, the self-luminous circuit layer being disposed between the first and second substrates, and including multiple display pixel units each of which includes at least one light blocking region and non-opaque region; an optical fingerprint sensor below the second substrate and including a fingerprint sensing circuit layer and a third substrate which is non-opaque, the fingerprint sensing circuit layer including multiple photosensitive pixel units each of which includes a non-opaque region and a light blocking region where a photosensitive element of the photosensitive pixel unit is disposed; a point-shaped backlight source below the optical fingerprint sensor, light emitted from the point-shaped backlight source entering the optical fingerprint sensor with first incident angle which is acute. Fingerprint recognition function is well integrated in the display module.

Claims

1. A display module, comprising:

a self-luminous display panel which comprises a first substrate, a second substrate and a self-luminous circuit layer, wherein the self-luminous circuit layer is disposed between the first substrate and the second substrate, and comprises a plurality of display pixel units,

wherein each of the plurality of display pixel units comprises at least one light blocking region and at least one non-opaque region,

wherein the display module further comprises;

an optical fingerprint sensor disposed below the second substrate, wherein the optical fingerprint sensor comprises a fingerprint sensing circuit layer and a third substrate, the third substrate comprises a non-opaque material, the fingerprint sensing circuit layer comprises a plurality of photosensitive pixel units, and each of the plurality of photosensitive pixel units comprises a non-opaque region and a light blocking region in which a photosensitive element of the photosensitive pixel unit is disposed; and

a point-shaped backlight source disposed below the optical fingerprint sensor, wherein light emitted from the point-shaped backlight source enters the optical fingerprint sensor with a first incident angle which is acute.

2. The display module according to claim 1, wherein the display module further comprises a protective layer disposed on the first substrate.

3. The display module according to claim 1, wherein a light anti-reflection layer is disposed below the second substrate.

4. The display module according to claim 1, wherein a non-opaque dielectric layer is disposed between the optical fingerprint sensor and the point-shaped backlight source, and the light emitted from the point-shaped backlight source enters the non-opaque dielectric layer and then enters the optical fingerprint sensor.

5. The display module according to claim 4, wherein a lower surface of the non-opaque dielectric layer is a light focusing surface, and the light emitted from the point-shaped backlight source enters the non-opaque dielectric layer from the light focusing surface which focuses the light emitted from the point-shaped backlight source into parallel light or near-parallel light.

6. The display module according to claim 1, wherein a light focusing lens is disposed in front of a light emitting surface of the point-shaped backlight source, the light focusing lens is capable of focusing the light emitted from the point-shaped backlight source into parallel light or near-parallel light, and the light emitted from the backlight source enters the light focusing lens and then enters the optical fingerprint sensor.

7. The display module according to claim 2, wherein an optical adhesive layer is disposed between the self-luminous display panel and the optical fingerprint sensor, or an optical adhesive layer is disposed between the self-luminous display panel and the protective layer.

8. The display module according to claim 1, wherein the point-shaped backlight source comprises one Light Emitting Diode (LED), and light of the LED is near-ultraviolet light, purple light, blue light, green light, yellow light, red light, near-infrared light or white light;

or, the point-shaped backlight source comprises at least two LEDs which are evenly arranged below the optical fingerprint sensor, and light of the LEDs is near-ultraviolet light, purple light, blue light, green light, yellow light, red light, near-infrared light or white light.

11. The display module according to claim 2, wherein a light anti-reflection layer is disposed below the second substrate.

12. The display module according to claim 2, wherein a non-opaque dielectric layer is disposed between the optical fingerprint sensor and the point-shaped backlight source, and the light emitted from the point-shaped backlight source enters the non-opaque dielectric layer and then enters the optical fingerprint sensor.

13. The display module according to claim 2, wherein a light focusing lens is disposed in front of a light emitting surface of the point-shaped backlight source, the light focusing lens is capable of focusing the light emitted from the point-shaped backlight source into parallel light or near-parallel light, and the light emitted from the backlight source enters the light focusing lens and then enters the optical fingerprint sensor.

14. The display module according to claim 2, wherein the point-shaped backlight source comprises one Light Emitting Diode (LED), and light of the LED is near-ultraviolet light, purple light, blue light, green light, yellow light, red light, near-infrared light or white light;

or, the point-shaped backlight source comprises at least two LEDs which are evenly arranged below the optical fingerprint sensor, and light of the LEDs is near-ultraviolet light, purple light, blue light, green light, yellow light, red light, near-infrared light or white light.

9. A method for using a display module,

wherein the display module comprises a self-luminous display panel, an optical fingerprint sensor and a point-shaped backlight source, wherein the self-luminous display panel comprises a first substrate, a second substrate and a self-luminous circuit layer, the self-luminous circuit layer is disposed between the first substrate and the second substrate, and comprises a plurality of display pixel units, each of the plurality of display pixel units comprises at least one light blocking region and at least one non-opaque region, the optical fingerprint sensor is disposed below the second substrate, and comprises a fingerprint sensing circuit layer and a third substrate, the third substrate comprises a non-opaque material, the fingerprint sensing circuit layer comprises a plurality of photosensitive pixel units, each of the plurality of photosensitive pixel units comprises a non-opaque region and a light blocking region in which a photosensitive element of the photosensitive pixel unit is disposed, the point-shaped backlight source is disposed below the optical fingerprint sensor, and light emitted from the point-shaped backlight source enters the optical fingerprint sensor with a first incident angle which is acute,

wherein the method comprises:

defining a display area of the self-luminous display panel which faces the optical fingerprint sensor as a first display area, and other display areas of the self-luminous display panel as a second display area; and

when the optical fingerprint sensor performs fingerprint image acquisition, controlling the first display area to stop displaying.

10. The method according to claim 9, further comprising:

when the optical fingerprint sensor performs fingerprint image acquisition, controlling the second display area to display information associated with the fingerprint image acquisition.