Compact low power head-mounted display with light emitting diodes that exhibit a desired beam angle
First Claim
1. A head-mounted display comprising:
- a display panel comprising an array of Light Emitting Diodes (LEDs) that are controllable to form an image;
circuitry to receive image data and render an image on the display panel; and
circuitry to detect motion of the head-mounted display, wherein the image data is generated based in part on the motion of the head-mounted display;
wherein each LED in the array of LEDs is configured to emit light at a specified beam angle that directs the light toward a pupil of a wearer of the head-mounted display and wherein at least one of the LEDs comprises;
a substrate;
a first doped semiconductor disposed over the substrate and forming a projection with sloped surfaces;
a light emitting layer disposed over the projection of the first doped semiconductor, wherein the beam angle is determined in part by a slope of the sloped surfaces;
a second doped semiconductor layer disposed over the light emitting layer; and
an electrode disposed over one side of the second doped semiconductor layer to cause an intensity of the light emitted from the light emitting layer to be higher in a direction normal to a plane of the one side that has the electrode.
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Accused Products
Abstract
A display panel is described which includes Light Emitting Diodes (LEDs) that exhibit a specified beam angle. The display panel can be used for a head-mounted display. An example of a head-mounted display includes a display panel with an array of LEDs that are controllable to form an image. The head-mounted display also includes circuitry to receive image data and render an image on the display panel. The head-mounted display also includes circuitry to detect motion of the head-mounted display. The image data is generated based in part on the motion of the head-mounted display. Each LED in the array of LEDs is configured to emit light at a specified beam angle that directs the light toward a pupil of a wearer of the head-mounted display.
65 Citations
23 Claims
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1. A head-mounted display comprising:
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a display panel comprising an array of Light Emitting Diodes (LEDs) that are controllable to form an image; circuitry to receive image data and render an image on the display panel; and circuitry to detect motion of the head-mounted display, wherein the image data is generated based in part on the motion of the head-mounted display; wherein each LED in the array of LEDs is configured to emit light at a specified beam angle that directs the light toward a pupil of a wearer of the head-mounted display and wherein at least one of the LEDs comprises; a substrate; a first doped semiconductor disposed over the substrate and forming a projection with sloped surfaces; a light emitting layer disposed over the projection of the first doped semiconductor, wherein the beam angle is determined in part by a slope of the sloped surfaces; a second doped semiconductor layer disposed over the light emitting layer; and an electrode disposed over one side of the second doped semiconductor layer to cause an intensity of the light emitted from the light emitting layer to be higher in a direction normal to a plane of the one side that has the electrode. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A head-mounted display comprising:
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a display panel comprising an array of Light Emitting Diodes (LEDs) that are controllable to form an image; circuitry to receive image data and render an image on the display panel; and circuitry to detect motion of the head-mounted display, wherein the image data is generated based in part on the motion of the head-mounted display; wherein each LED in the array of LEDs is configured to emit light at a specified beam angle that directs the light toward a pupil of a wearer of the head-mounted display; and
wherein at least one of the LEDs comprises;a light emitting layer and a window layer, the window layer comprising transparent semiconductor material disposed over the light emitting layer; an oxide layer disposed around an outer circumference of the window layer to form a depression with sloping walls, wherein the window layer sits at a base of the depression; and a conductive layer disposed over the oxide layer along a portion of the sloping walls of the depression, wherein the conductive layer forms a reflective surface that reflects light emitted through the window layer. - View Dependent Claims (8, 9)
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10. A display panel comprising:
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a plurality of pixels that are controllable to form an image, each pixel comprising a plurality of Light Emitting Diodes (LEDs); and a Thin Film Transistor (TFT) backplane to activate the LEDs; wherein each LED in the plurality of LEDs is configured to emit light at a specified beam angle to direct the light toward a viewer'"'"'s pupil, and wherein at least one of the LEDs comprises; a substrate; a first doped semiconductor disposed over the substrate and forming a projection with sloped surfaces; a light emitting layer disposed over the projection of the first doped semiconductor, wherein the beam angle is determined in part by a slope of the sloped surfaces; a second doped semiconductor layer disposed over the light emitting layer; and an electrode disposed over one side of the second doped semiconductor layer to cause an intensity of the light emitted from the light emitting layer to be higher in a direction normal to a plane of the one side that has the electrode. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A display panel comprising:
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a plurality of pixels that are controllable to form an image, each pixel comprising a plurality of Light Emitting Diodes (LEDs); and a Thin Film Transistor (TFT) backplane to activate the LEDs; wherein each LED in the plurality of LEDs is configured to emit light at a specified beam angle to direct the light toward a viewer'"'"'s pupil, and wherein at least one of the LEDs comprises; a light emitting layer and a window layer, the window layer comprising transparent semiconductor material disposed over the light emitting layer; an oxide layer disposed around an outer circumference of the window layer to form a depression with sloping walls, wherein the window layer sits at a base of the depression; and a conductive layer disposed over the oxide layer along a portion of the sloping walls of the depression, wherein the conductive layer forms a reflective surface that reflects light emitted through the window layer. - View Dependent Claims (17, 18)
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19. A method of fabricating a Light Emitting Diode (LED) for a display panel, the method comprising:
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forming an N-type layer over a semiconductor substrate; forming an insulator layer over the N-type layer; and forming a plurality of light emitting elements that project above a surface of an insulator, wherein the plurality of light emitting elements are isolated from each other, and wherein forming each light emitting element of the plurality of light emitting elements comprises; forming a light emitting layer; forming a P-type layer over the light emitting layer; and forming a transparent P-type metal layer over one side of the P-type layer to cause an intensity of the light emitted from the light emitting layer to be higher in a direction normal to a plane of the one side that has the transparent P-type metal layer; wherein forming the plurality of light emitting element comprises controlling a shape of the light emitting elements to produce a specified beam angle. - View Dependent Claims (20, 21)
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22. A method of fabricating a Light Emitting Diode (LED) for a display panel, the method comprising:
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forming a light emitting layer; forming a window layer over the light emitting layer, the window layer comprising transparent semiconductor material; forming an oxide layer around an outer circumference of the window layer to form a depression with sloping walls, wherein the window layer sits at a base of the depression; and forming a conductive layer over the oxide layer along a portion of the sloping walls of the depression, wherein the conductive layer forms a reflective surface that reflects light emitted through the window layer. - View Dependent Claims (23)
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Specification