Long operational lifetime OLED display
Embodiments of the disclosed subject matter provide a device having a full-color organic light emitting device (OLED) display having a plurality of pixels, with each pixel having a plurality of sub-pixels and where no individual sub-pixel of the plurality of sub-pixels emits white light. The OLED display may be configured to operate with a luminance of at least 1,000 cd/m 2 at the D65 or higher white point, and using not more than a 0.5 mA/cm 2 drive current for a blue sub-pixel of the plurality of sub-pixels based on an overall active area of the full-color OLED display.
1 . A device comprising:
a full-color organic light emitting device (OLED) display comprising a plurality of pixels, with each pixel comprising a plurality of sub-pixels and where no individual sub-pixel of the plurality of sub-pixels emits white light,
wherein the OLED display is configured to operate with a luminance of at least 1,000 cd/m 2 at the D65 or higher white point, and using not more than a 0.5 mA/cm 2 drive current for a blue sub-pixel of the plurality of sub-pixels based on an overall active area of the full-color OLED display, and wherein the full-color OLED display is configured to use not more than a drive current of 0.5 mA/cm 2 , based on the overall active area of the full-color OLED display, divided by N for the blue sub-pixels of the plurality of sub-pixels disposed in a stack arrangement with N emissive layers, to operate with the luminance of the at least 1,000 cd/m 2 at the D65 or higher white point.
2 . The device of claim 1 , wherein the OLED display is configured to operate with the luminance of at least 1,000 cd/m 2 at the D65 or higher white point at a DCI-P3 color gamut, or with greater than 64% of the Rec2020 color gamut.
3 . The device of claim 1 , wherein the drive current to at least one of the plurality of sub-pixels is pulsed with a duty cycle that is less than 100%.
4 . The device of claim 1 , wherein the sub-pixels of the OLED display comprise:
a first blue emissive layer disposed on a second blue emissive layer to form a blue tandem sub-pixel;
wherein the drive current of the blue tandem sub-pixel is less than 0.25 mA/cm 2 , based on the overall active area of the full-color OLED display, to operate with the luminance of the at least 1,000 cd/m 2 at the D65 or higher white point.
5 . The device of claim 1 , wherein the plurality of sub-pixels comprises blue sub-pixels, green sub-pixels, and red subpixels, and
wherein a first sub-pixel area that includes the blue sub-pixels is larger than at least one selected from the group consisting of: a second sub-pixel area that includes the green sub-pixels, and a third sub-pixel area that includes the red sub-pixels.
6 . The device of claim 1 , wherein the plurality of sub-pixels comprises blue sub-pixels, green sub-pixels, and red subpixels, and
wherein a first sub-pixel area that includes the blue sub-pixels is larger than a combination of a second sub-pixel area that includes the green sub-pixels and a third sub-pixel area that includes the red sub-pixels.
7 . The device of claim 1 , wherein each pixel of the plurality of pixels has no more than three sub-pixels.
8 . The device of claim 1 , wherein each pixel of the plurality of pixels has more than three sub-pixels.
9 . The device of claim 1 , wherein the plurality of sub-pixels comprises blue sub-pixels, green sub-pixels, and red sub-pixels, the device further comprising:
a circular polarizer disposed over only the red sub-pixels and the green sub-pixels.
10 . The device of claim 9 , further comprising:
a color filter disposed over the blue sub-pixels.
11 . The device of claim 1 , further comprising:
a power supply to provide a pulsed power the OLED display at less than a 100% duty cycle when the OLED display is on.
12 . The device of claim 1 , wherein a power consumption of the OLED display is less than 9 mW/cm 2 at equal or greater to D65 white point at 1,000 nits, excluding a driving circuity power consumption that is external to the active area of the full-color OLED display.
13 . The device of claim 1 , wherein a blue sub-pixel of the plurality of sub-pixels is shared between at least two pixels of the plurality of pixels.
14 . The device of claim 1 , wherein at least one pixel of the plurality of pixels of the OLED display comprises:
a first blue sub-pixel disposed on a second blue sub-pixel to form a blue tandem sub-pixel;
a first green sub-pixel disposed on a second green sub-pixel to form a green tandem sub- pixel; and
a first red sub-pixel disposed on a second red sub-pixel to form a red tandem sub-pixel.
15 . The device of claim 1 , wherein at least the blue sub-pixel is a plasmonic PHOLED (phosphorescent organic light emitting device) blue sub-pixel.
16 . The device of claim 1 , wherein the device is at least one type selected from the group consisting of: a flat panel display, a curved display, a computer monitor, a medical monitor, a television, a billboard, a light for interior or exterior illumination and/or signaling, a heads-up display, a fully or partially transparent display, a flexible display, a rollable display, a foldable display, a stretchable display, a laser printer, a telephone, a cell phone, tablet, a phablet, a personal digital assistant (PDA), a wearable device, a laptop computer, a digital camera, a camcorder, a viewfinder, a micro-display that is less than 2 inches diagonal, a 3-D display, a virtual reality or augmented reality display, a vehicle, a video walls comprising multiple displays tiled together, a theater or stadium screen, and a sign.
17 . A device comprising:
a full-color organic light emitting device (OLED) display comprising a plurality of pixels, with each pixel comprising a plurality of sub-pixels and where no individual sub-pixel of the plurality of sub-pixels emits white light, and wherein at least one sub-pixel of the plurality of sub-pixels includes two or more emissive regions in a stacked arrangement,
wherein the OLED display is configured to operate with power consumption of the OLED display is less than 9 mW/cm 2 at equal or greater to D65 white point at 1,000 nits, excluding a driving circuity power consumption that is external to the active area of the full-color OLED display, and
wherein one or more of the following is true:
i) each emissive region of the two or more emissive regions in each sub-pixel of the plurality of sub-pixels emits light of the same color; and
ii) each emissive region of the two or more emissive regions in each sub-pixel of the plurality of sub-pixels comprises an emitter with the same chemical composition.
18 . The device of claim 17 , wherein the at least one sub-pixel of the plurality of sub-pixels that includes two or more emissive regions in the stacked arrangement comprises:
all of the sub-pixels of the plurality of sub-pixels including the two or more emissive regions in the stacked arrangement.
19 . A device comprising:
a full-color organic light emitting device (OLED) display comprising a plurality of pixels, with each pixel comprising a plurality of sub-pixels and where no individual sub-pixel of the plurality of sub-pixels emits white light,
wherein the OLED display is configured to operate with a luminance of at least 1,000 cd/m 2 at the D65 or higher white point, and using not more than a 0.5 mA/cm 2 drive current for a blue sub-pixel of the plurality of sub-pixels based on an overall active area of the full-color OLED display,
a first global power supply rail configured to provide steady-state power to the OLED display; and
a second global power supply rail configured to provide pulsed power to the OLED display at less than a 100% duty cycle.
20 . The device of claim 19 , wherein the first global power supply rail provides steady state power to at least one of the plurality of sub-pixels, and the second global power supply rail provides pulsed power to at least another one of the plurality of sub-pixels.