Luminaire utilizing a transparent organic light emitting device display

• US 10,367,034 B2
• Filed: 06/08/2016
• Issued: 07/30/2019
• Est. Priority Date: 04/11/2016
• Status: Active Grant

• Current Assignee: ABL IP Holding LLC (Acuity Brands, Inc.)
• Original Assignee: ABL IP Holding LLC (Acuity Brands, Inc.)
• Inventors: Lin, Guan-Bo, Mao, An, Komanduri, Ravi Kumar, Ramer, David P., Raj, Rashmi Kumar
• Primary Examiner(s): Williams, Joseph L
• Application Number:
  US15/176,623
• Publication Number:
  US 20170294488A1
• Time in Patent Office: 1,147 Days
• CPC Class Codes: F21V 14/00 Controlling the distribution of the light emitted by adjustment of elements reflectors with provision for adjusting the curvature F21V7/16; light filters or the like with provision for controlling the colour or intensity F21V9/40; screens using adjustable parallel laminae or strips F21V11/04; screens using iris-type diaphragms F21V11/10; screens using movable sheets without apertures F21V11/18; adjustable mountings for lighting devices F21V21/14
• CPC Class Codes: G02F 1/29 for the control of the position or the direction of light beams, i.e. deflection
• CPC Class Codes: H01L 27/1214 comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52
• CPC Class Codes: H01L 27/1255 integrated with passive devices, e.g. auxiliary capacitors
• CPC Class Codes: H10K 50/856 comprising reflective means
• CPC Class Codes: H10K 59/121 characterised by the geometry or disposition of pixel elements
• CPC Class Codes: H10K 59/1213 the pixel elements being TFTs
• CPC Class Codes: H10K 59/1216 the pixel elements being capacitors
• CPC Class Codes: H10K 59/123 Connection of the pixel electrodes to the thin film transistors [TFT]
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/179 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/32 Stacked devices having two or more layers, each emitting at different wavelengths
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels
• CPC Class Codes: H10K 59/50 OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
• CPC Class Codes: H10K 59/878 comprising reflective means

Abstract

The examples relate to various implementations of a software configurable luminaire and a transparent display device for use in such a luminaire. The luminaire is able to generate light sufficient to provide general illumination of a space in which the luminaire is installed and provide an image display. The general illumination is provided by additional light sources and/or improved display components of the transparent display device.

Claims

1. A transparent display panel, comprising:

(a) an array of display pixels configured on a same substrate, wherein the array has horizontal and vertical dimensions on the substrate and each respective display pixel of the array comprises;

a plurality of separately controllable organic light emitting diodes (OLEDs), each of the OLEDs configured one upon another to form an OLED stack on the substrate, wherein each separately controllable OLED is constructed to emit visible light of a different respective one of three colors,

a first of the plurality of OLEDs being stacked on a light emitting surface of a second of the plurality of OLEDs and the second of plurality of OLEDs being stacked on a light emitting surface of a third of the plurality of OLEDs so that;

light from a light emitting surface of the third OLED passes through the second and first OLEDs, light from a light emitting surface of the second OLED passes through the first OLED, and light emerging from a light emitting surface of the first OLED includes light emitted by the first OLED as well as light emitted by the second and third OLEDs; and

(b) a transparent region on the substrate adjacent to the OLED stack of the respective display pixel, wherein the transparent region is configured horizontally and vertically on the substrate in-between the OLED stack of the respective display pixel and the OLED stack of at least another adjacent display pixel in the array, and is formed from a transparent material.

2. The transparent display panel of claim 1, wherein at least one of the plurality of separately controllable OLEDs includes a tandem stack of two OLEDs constructed to emit visible light of the respective one of the three different colors.

3. The transparent display panel of claim 1, wherein:

each respective display pixel of the array of display pixels includes transistor circuits associated with the respective display pixel to activate the OLEDs of the respective display pixel; and

the array further includes interconnections to the transistor circuits to configure the array as an active matrix OLED array of display pixels.

4. The transparent display panel of claim 3, wherein the transistor circuits and interconnections of each of the respective OLEDs in the OLED stack are positioned over other transistor circuits and interconnections of another OLED in the OLED stack.

5. The transparent display panel of claim 1, wherein the array of display pixels includes:

a plurality of electrodes interconnecting each OLED in the OLED stack of each respective display pixel in the array to form a passive matrix array, wherein each OLED in the respective display pixels in the passive matrix array includes;

a first electrode coupled to a first side of the OLED; and

a second electrode coupled to a second side of the OLED, wherein the OLED is activated by electrical current passing between the first electrode and the second electrode.

6. The transparent display panel of claim 1, wherein the OLEDs in the OLED stack are coupled via a matrix of electrodes connected to opposing sides of each OLED in the OLED stack to facilitate activation of the respective OLED.

7. The transparent display panel of claim 6, wherein each electrode in the matrix of electrodes has a width that is substantially equivalent to or smaller than a width of a light emitting region of each respective OLED.

8. A transparent display panel, comprising:

(a) an array of display pixels configured on a same substrate, wherein the array has horizontal and vertical dimensions on the substrate and each respective display pixel of the array comprises three separately controllable organic light emitting diodes (OLEDs), each of the OLEDs being configured one upon another to form an OLED stack on the substrate and constructed to emit visible light of a different respective one of three colors; and

(b) a transparent region on the substrate adjacent to the OLED stack of the respective display pixel, wherein the transparent region of the respective display panel is configured horizontally and vertically on the substrate in-between the OLED stack of the respective display pixel and the OLED stack of at least another adjacent display pixel in the array;

wherein the display pixels are structured so that the transparent display panel exhibits an overall optical transmissivity with respect to at least the three colors of light of 50% or more.

9. The display panel of claim 8, transparent display panel, wherein in each display pixel of the array, at least one of the three OLEDS comprises a tandem stack of two OLEDs constructed to emit visible light of the respective one of the three different colors.

10. The transparent display of claim 8, wherein the three separately controllable OLEDs, comprises:

a first organic light emitting device (OLED) having a first color, a second OLED having a second color, a third OLED coupled in a stacked orientation; and

an electrical connection connecting the first OLED, the second OLED, and the third OLED together in series, wherein the electrical connection applies a voltage across the first OLED, the second OLED, and the third OLED.

11. The transparent display panel of claim 8, wherein in each pixel of the array, another one of the three OLEDS comprises a tandem stack of two OLEDs of constructed to emit visible light of the same one of the three colors.

12. The transparent display panel of claim 8, wherein a ratio of percentage of pixel area occupied by the OLED stack to percentage of pixel area occupied by the transparent area is less than or equal to 80%:

20%.

13. The transparent display panel of claim 8, wherein a ratio of percentage of pixel area occupied by the OLED stack to percentage of pixel area occupied by the transparent area is approximately equal to 20%:

80%.

14. The transparent display panel of claim 8, wherein the display pixels are structured so that the transparent display panel exhibits an overall optical transmissivity with respect to at least the three colors of light of 60% or more.

15. The transparent display panel of claim 14, wherein the display pixels are structured so that the transparent display panel exhibits an overall optical transmissivity with respect to at least the three colors of light of 70% or more.

16. The transparent display panel of claim 15, wherein the display pixels are structured so that the transparent display panel exhibits an overall optical transmissivity with respect to at least the three colors of light of 80% or more.

17. The transparent display panel of claim 16, wherein the display pixels are structured so that the transparent display panel exhibits an overall optical transmissivity with respect to at least the three colors of light of approximately 85% or more.

18. A stacked light emitting device, comprising:

a substrate;

a first electrode disposed on the substrate;

a first organic light emitting device (OLED) disposed over the substrate and electrically coupled to the first electrode;

a second electrode disposed over the first OLED and electrically coupled to the first OLED;

a second OLED disposed over the second electrode and electrically coupled to the second electrode;

a third electrode disposed over the second OLED and electrically coupled to the second OLED;

a third OLED disposed over the third electrode and electrically coupled to the third electrode; and

a fourth electrode disposed over the third OLED and electrically coupled to the third OLED,

wherein the first, second, and third OLEDs are configured to form an OLED stack on a same substrate, and each of the OLEDs emit light of one of three different colors, and

wherein a transparent region, formed from a transparent material, is configured horizontally and vertically on the substrate in-between the OLED stack and at least another adjacent OLED stack on the substrate.

19. The stacked light emitting device of claim 18, further comprising:

a charge generation layer disposed over the third OLED; and

a fourth OLED disposed over the charge generation layer, wherein;

both the charge generation layer and the fourth OLED are disposed between the fourth electrode and the third electrode, and

the third OLED and the fourth OLED output light of the same color.

20. The stacked light emitting device of claim 19, further comprising:

a reflective layer disposed either on a side of the fourth electrode opposite the third OLED or on a side of the first electrode.