IP Library › Granted Patent US 10,318,074
Granted Patent B2
US 10,318,074 · App. 15/008,018 · Granted Jun 11, 2019

Touch-sensing OLED display with tilted emitters

Inventors: Gunnar Klinghult (Lund, SE); Ivan Karlsson (Lund, SE)
Assignee: FlatFrog Laboratories AB
G06F3/042G06F3/0428G06F2203/04103G06F2203/04109
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 10,318,074
App. No.
15/008,018
Granted
Jun 11, 2019
Kind
B2
Abstract

A touch-sensitive display, comprising a transmissive panel defining the touch surface, a first set of OLED emitters forming display pixels, a second set of OLED emitters configured to emit light via an adjacent cell into the transmissive panel for propagation therein via total internal reflection, and a set of detectors configured to receive light from the second set of OLED emitters after the light has propagated inside the transmissive panel via total internal reflection. The first set and the second set of OLED emitters are arranged on the same substrate.

Claims (34)

1. A touch-sensitive display, comprising:

a transmissive panel defining the touch surface;

a first set of OLED emitters forming display pixels;

a second set of OLED emitters configured to emit light via an adjacent cell into the transmissive panel for propagation therein via total internal reflection, each of the second set of OLED emitters comprise a top surface proximate with a bottom surface of the transmissive panel, a bottom surface opposite the top surface, a first side surface proximate to the adjacent cell, and a second side surface opposite the first side surface,

wherein the top, the bottom, and the second side surfaces comprise a reflective material, thereby preventing the emitted light from being emitted through the top surface and emitted into the transmissive panel only via the first side surface; and

a set of detectors configured to receive light from the second set of OLED emitters after the light has propagated inside the transmissive panel via total internal reflection;

wherein the first set and the second set of OLED emitters are arranged on the same substrate.

2. The touch-sensitive display of claim 1 , wherein the adjacent cell is an OLED emitter of the first set.

3. The touch-sensitive display of claim 1 , wherein the adjacent cell is a light transmissive aperture cell.

4. The touch-sensitive display of claim 3 , wherein the light transmissive aperture cell comprises plastic material, transparent OLED carrier or OLED compound.

5. The touch-sensitive display of claim 1 , wherein each OLED emitter of the second set is configured with an at least partially reflective layer between the transmissive panel and an active material of the OLED emitter of the second set.

6. The touch-sensitive display of claim 5 , wherein the reflective layer is at least 70% reflective.

7. The touch-sensitive display of claim 5 , wherein the reflective layer is less than 50% transmissive.

8. The touch-sensitive display of claim 5 , wherein the reflective layer comprises silver.

9. The touch-sensitive display of claim 5 , wherein the reflective layer comprises an anode or cathode of the OLED emitter.

10. The touch-sensitive display of claim 5 , wherein the reflective layer is in a plane that is at an angle of 0-45 degrees to a plane of the touch surface.

11. The touch-sensitive display of claim 1 , wherein the OLED emitter is configured with an anode and a cathode layer arranged perpendicular to the plane of the panel.

12. The touch-sensitive display of claim 1 , wherein the touch-sensing display panel is provided with a reflective material between a back substrate and the aperture cell.

13. The touch-sensitive display of claim 1 , wherein the touch-sensitive display comprises organic photo detectors.

14. A method of producing a touch sensitive display panel, comprising:

providing a transparent substrate;

providing a matrix of image pixels and emitter pixels at a surface of the substrate;

providing at least one of the emitter pixels with an adjacent cell, configured to allow light to be emitted from the emitter pixel to the transparent substrate via the adjacent cell, the at least one of the emitter pixels comprise a top surface proximate with a bottom surface of the transmissive panel, a bottom surface opposite the top surface, a first side surface proximate to the adjacent cell, and a second side surface opposite the first side surface,

wherein the top, the bottom, and the second side surfaces comprise a reflective material, thereby preventing the emitted light from being emitted through the top surface and emitted into the transmissive panel only via the first side surface;

providing a cover sheet over the pixel matrix; and

sealing the cover sheet to the substrate.

15. A method of producing a touch sensitive display panel, comprising:

providing a carrier sheet;

providing a matrix of image pixels and emitter pixels on the carrier sheet;

providing at least one of the emitter pixels with an adjacent cell, the at least one of the emitter pixels comprise a top surface proximate with a bottom surface of the transmissive panel, a bottom surface opposite the top surface, a first side surface proximate to the adjacent cell, and a second side surface opposite the first side surface,

wherein the top, the bottom, and the second side surfaces comprise a reflective material, thereby preventing the emitted light from being emitted through the top surface and emitted into the transmissive panel only via the first side surface;

providing a transparent substrate over the image pixels and the emitter pixels; and

sealing the transparent substrate to the carrier sheet;

wherein the adjacent cell is configured to allow light to be emitted from the emitter pixel to the transparent substrate via the adjacent cell.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 25, 2019
From: KLINGHULT, GUNNAR; KARLSSON, IVAN
To: FLATFROG LABORATORIES AB
Reel/Frame 049001/0255 →
Priority Claims (1)
SE 1550096 · Jan 30, 2015 · national
Continuity (1)
Related Publication 20160224144A1 · Aug 4, 2016
Cited By (7)
US 12,189,906 US 12,282,653 US 12,461,630 US 12,524,116 US 12,524,117 US 12,566,525 US 12,704,928