PATENT DOCUMENT

Publication Number: US-11143806-B1
Application Number: US-201715709729-A
Country: US
Kind Code: B1

Title: Electronic devices having pixels with elevated fill factors

Abstract:
An electronic device with a display may be provided with an array of pixels each of which includes subpixels formed from organic light-emitting diodes. The electronic device may have support structures such as a head-mountable frame or other head-mountable support structure. Optical structures such as lenses may be provided through which the array of pixels is viewable by a user. The array of pixels and the lenses or other optical structures may be supported by the head-mounted support structure. Light spreading structures may overlap the array of pixels to enhance the fill factor of the pixels. The light spreading structures may be formed from a fiber bundle layer, an array of microlenses, or other optical structures that laterally spread light that has been emitted by the organic light-emitting diodes and thereby enhances the fill factor of the pixels.

Claims:
What is claimed is: 
     
       1. An electronic device with a display configured to display images viewable by a user, comprising:
 a head-mounted support structure; 
 an array of pixels supported by the support structure, wherein the array of pixels is configured to produce light associated with the images; 
 a fiber bundle layer that overlaps the array of pixels; and 
 an optical system supported by the head-mounted support structure through which the images are viewable, wherein the array of pixels is formed from a layer of thin-film circuitry containing thin-film transistors, a layer of patterned anodes on the layer of thin-film circuitry, organic emissive material on the anodes, a cathode layer, and an overcoat layer and wherein the overcoat layer is interposed between the fiber bundle layer and the cathode layer. 
 
     
     
       2. The electronic device defined in  claim 1  wherein the fiber bundle layer includes an array of fibers and includes binder that binds the fibers together and wherein the fibers each have a rectangular cross-sectional shape. 
     
     
       3. An electronic device with a display configured to display images viewable by a user, comprising:
 a head-mounted support structure; 
 an array of pixels supported by the head-mounted support structure, wherein the array of pixels is configured to produce light associated with the images; 
 an array of microlenses, each pixel overlapping at least one microlens; and 
 an optical system supported by the head-mounted support structure through which the images are viewable, wherein the array of microlenses is interposed between the array of pixels and the optical system. 
 
     
     
       4. The electronic device defined in  claim 3  wherein the each of the pixels includes first, second, and third light-emitting diodes of different colors and wherein each microlens overlaps the first, second, and third light-emitting diodes of a respective one of the pixels. 
     
     
       5. The electronic device defined in  claim 3  wherein each of the pixels includes first, second, and third light-emitting diodes of different colors, wherein each of the first light-emitting diodes is overlapped by a respective one of the microlenses, and wherein each of the second light-emitting diodes is overlapped by a respective one of the microlenses. 
     
     
       6. The electronic device defined in  claim 5  wherein each of the third light-emitting diodes is overlapped by a respective one of the microlenses. 
     
     
       7. The electronic device defined in  claim 5  wherein each of the third light-emitting diodes is overlapped by a respective pair of the microlenses. 
     
     
       8. The electronic device defined in  claim 7  wherein each of the third light-emitting diodes is a blue light-emitting diode. 
     
     
       9. The electronic device defined in  claim 3  further comprising a coating layer on the array of microlenses, wherein the microlenses have a first index of refraction and wherein the coating layer has a second index of refraction that is greater than the first index of refraction. 
     
     
       10. An electronic device with a display configured to display images viewable by a user, comprising:
 a support structure; 
 an array of pixels supported by the support structure, wherein the array of pixels is configured to produce light associated with the images; and 
 a fiber bundle layer that overlaps the array of pixels, wherein the array of pixels is formed from a layer of thin-film circuitry containing thin-film transistors, a layer of patterned anodes on the layer of thin-film circuitry, organic emissive material on the anodes, a cathode layer, and an overcoat layer and wherein the overcoat layer is interposed between the fiber bundle layer and the cathode layer.

Description:
This application claims the benefit of U.S. provisional patent application No. 62/466,668, filed on Mar. 3, 2017 which is hereby incorporated by reference herein in its entirety. 
    
    
     BACKGROUND 
     This relates generally to displays and, more particularly, to head-mounted displays. 
     Head-mounted displays may have display panels and lenses. Lenses may be used to magnify images displayed on a display panel. If care is not taken, the images that are presented to a user of a head-mounted display will contain visual artifacts. For example, display panels may be subject to unwanted screen door effects. Screen door effects occur when pixels have low fill factors and can be intensified when images are magnified using lenses in a head-mounted display. 
     SUMMARY 
     A head-mounted display such as a virtual reality headset may be provided with a pixel array formed from a display panel with an array of organic light-emitting diodes. The pixel array may be mounted to a head-mounted support structure. Optical structures such as lenses may also be mounted to the head-mounted support structure. Images on the pixel array may be viewed by a user through the optical structures. 
     The fill factor of the pixels in the pixel array may be enhanced by forming light spreading structures over the organic light-emitting diodes. The light spreading structures may laterally spread light that is being emitted by the organic light-emitting diodes and may thereby increase the fill factor of the pixels an enhanced value such as 90% or more. 
     The light spreading structures may be formed from a fiber bundle layer, an array of microlenses, or other optical structures that are configured to laterally spread emitted light from the organic light-emitting diodes in the pixels. A fiber bundle layer may be formed from a layer of fibers each of which overlaps a respective one of the pixels. An array of microlenses may be formed on the pixel array so that each microlens overlaps one, two, three, or other suitable number of organic light-emitting diodes. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a diagram of an illustrative head-mounted display in accordance with an embodiment. 
         FIG. 2  is a diagram of an illustrative pixel array in a head-mounted display in accordance with an embodiment. 
         FIG. 3  is a cross-sectional side view of an illustrative organic light-emitting diode display for a device such as a head-mounted display in accordance with an embodiment. 
         FIG. 4  is a top view of an illustrative pixel having subpixels of three different colors in accordance with an embodiment. 
         FIG. 5  is a top view of an illustrative fiber bundle layer in accordance with an embodiment. 
         FIG. 6  is a cross-sectional side view of an illustrative display such as an organic light-emitting diode display with a fiber bundle layer in accordance with an embodiment. 
         FIG. 7  is a cross-sectional side view of an illustrative display such as an organic light-emitting diode display having pixels with microlenses for enhancing fill factor in accordance with an embodiment. 
         FIGS. 8 and 9  are top views of illustrative subpixel patterns for displays with microlenses in accordance with an embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     Head-mounted displays may be used for virtual reality and augmented reality systems. For example, a virtual reality headset that is worn on the head of a user may be used to provide a user with virtual reality content. 
     An illustrative system in which a head-mounted display is used in providing a user with virtual reality content and/or augmented reality content is shown in  FIG. 1 . As shown in  FIG. 1 , head-mounted display  10  may include a display such as display  14  (sometimes referred to as a display panel or pixel array). Display  14  may be mounted to frame  12  or other head-mountable support structures that allow display  14  to be mounted on the head of a user. 
     Display  14  may have an opaque substrate or may be transparent. Any suitable display technology may be used in forming the pixels of display  14 . As an example, display  14  may be an organic light-emitting diode display or other display having an array of organic light-emitting diode pixels that display images for viewer  18 . Images on the pixel array of display  14  may be viewed by user&#39;s eyes  18  through an optical system such as optical system  16 . Optical system  16  may be mounted to frame  12  or other head-mounted display support structures. 
     Optical system  16  may include one or more lenses. For example, optical system  16  may include a first lens that focuses images on a left-hand portion of display  14  for viewing by a left-hand user&#39;s eye  18  and may include a second lens that focuses images on a right-hand portion of display  14  for viewing by a right-hand user&#39;s eye  18 . 
     If desired, head-mounted display  10  may have beam splitters and/or other optical combiners that are used to merge real-world images with images from display  14  (e.g., to provide a user with an augmented reality experience), display  10  may include one or more cameras to capture images that are displayed on display  14  (e.g., for augmented reality), head-mounted display  10  may be a virtual reality headset (e.g., display  14  may be opaque and/or may be mounted in opaque portions of support structure  12  that block ambient light), and/or other configurations may be used for head-mounted display  10 . The configuration of  FIG. 1  is merely illustrative. 
     Display  14  may be based on a liquid crystal display, an organic light-emitting diode display, a display having an array of crystalline semiconductor light-emitting diode dies, and/or displays based on other display technologies. Separate left and right display panels may be included in head-mounted display  10  for the user&#39;s left and right eyes or a single display panel may span both eyes  18 . 
     Visual content (e.g., image data for still and/or moving images) may be provided to display  14  using control circuitry that is mounted in head-mounted display  10  and/or control circuitry that is mounted outside of head-mounted display  10  (e.g., in an associated portable electronic device, laptop computer, or other computing equipment). The control circuitry may include storage such as hard-disk storage, volatile and non-volatile memory, electrically programmable storage for forming a solid-state drive, and other memory. The control circuitry that provides images for displaying on display  14  of head-mounted display  10  may also include one or more microprocessors, microcontrollers, digital signal processors, graphics processors, baseband processors, application-specific integrated circuits, and other processing circuitry. Communications circuits in head-mounted display  10  may be used to transmit and receive data (e.g., wirelessly and/or over wired paths). 
     Control circuitry in head-mounted display  10  may use display  14  to display visual content such as virtual reality content (e.g., computer-generated content associated with a virtual world), pre-recorded video for a movie or other media, or other images. Illustrative configurations in which the control circuitry of head-mounted display  10  provides a user with virtual reality content using display  14  may sometimes be described herein as an example. In general, however, any suitable content may be presented to a user by the control circuitry of head-mounted display  10  using display  14  and optical system (lenses)  16 . 
       FIG. 2  is a diagram of an illustrative display such as display  14  of  FIG. 1 . Display  14  may include a source of images such as pixel array  20 . Pixel array  20  may be formed from a two-dimensional array of pixels  22  (e.g., organic light-emitting diode pixels, liquid crystal display pixels, etc.). Pixels  22  may be arranged in rows and columns. Columns of pixels  22  may be provided with data over data lines D. Rows of pixels may be controlled using horizontal control signals (sometimes referred to as scan signals, emission enable signals, gate line signals, etc.) that are provided to the pixels using one or more gate lines G in each row. 
     Control circuitry in head-mounted display  10  may provide display  14  with image data via path  24 . Display  14  may include display driver circuitry  26 . Display driver circuitry  26  may include data line (column) driver circuitry  26 A and gate line driver circuitry  26 B. Circuitry  26 A and  26 B may be formed using one or more integrated circuits and/or thin-film transistor circuitry. With one illustrative configuration, driver circuitry  26 A may receive image data via path  24  and may provide corresponding data signals to columns of pixels  22  via data lines D while supplying clock and control signals to gate line driver circuitry  26 B. Gate line driver circuitry  26 B may supply gate line control signals to rows of pixels  22  based on the clock and control signals received from display driver circuitry  26 A. There may be gate line driver circuitry  26 B on one or more edges of pixel array  20 . For example, gate line driver circuitry  26 B may be formed on the left-hand edge of display  14  and/or gate line driver circuitry  26 B′ may be formed on the right-hand edge of display  14 . 
     To reduce weight and ensure that head-mounted display  10  is compact and not too bulky, it may be desirable to form display  14  from lightweight display structures such as a lightweight organic light-emitting diode display panel or a lightweight display panel having an array of light-emitting diodes formed from respective crystalline semiconductor dies (as examples). A cross-sectional side view of an illustrative organic light-emitting diode display formed from thin-film circuitry is shown in  FIG. 3 . 
     As shown in  FIG. 3 , display  14  may have a substrate such as substrate  32 . Substrate  32  may be formed from glass, polymer, and/or other materials. Thin-film circuitry  34  may be formed from layers of dielectric, metal, and semiconductors and may include thin-film capacitors, interconnect lines, and thin-film devices such as thin-film transistor  36 . For example, a layer of thin-film circuitry such as circuitry  34  may include thin-film transistors that serve as switching transistors, emission enable transistors, drive transistors, and other pixel circuit transistors. Thin-film layers may be deposited and patterned on thin-film circuitry  34  to form organic light-emitting diodes for pixels  22  such as illustrative light-emitting diode  30  of  FIG. 3 . 
     Each light-emitting diode  30  may include a layer of organic emissive material  40  interposed between an anode such as anode  38  and a cathode such as cathode  42 . Anodes  38  may be formed from a patterned metal layer deposited on the upper surface of thin-film circuit layer  34 . Cathode  42  may be formed from a blanket conductive film (e.g., a film of transparent conductive material such as indium tin oxide and/or a layer of one or more metals that is sufficiently thin to be transparent). Light-emitting diode  30  may be formed in an opening in pixel definition layer  44 . Pixel definition layer  44  may be formed from a layer of polymer. Overcoat layer  46  may be formed from one or more transparent materials (e.g., polymer, inorganic materials, etc.). Overcoat layer  46  may help planarize and protect the array of diodes  30  formed on substrate  32  (e.g., overcoat layer  46  may serve as an encapsulation layer for thin-film circuitry such as diodes  30  and the circuitry of layer  34 ). 
     During operation, transistors  36  may supply current to organic light-emitting diodes  30  under the control of display driver circuitry  26 . This causes light-emitting diodes  30  to emit light  48  and causes the array of pixels  22  in display  14  to display images for a user. 
     Each pixel  22  of pixel array  20  may include multiple subpixels. The subpixels may have light-emitting diodes of different colors (e.g., red, green, blue, light blue, yellow, etc.). As an example, each pixel  22  of array  20  may have a red subpixel, a green subpixel, and a blue subpixel. The red subpixels of display  14  may have red light-emitting diodes  30  that contain red emissive material  40  and that emit red light  48 , the green subpixels of display  14  may have green light-emitting diodes  30  that contain green emissive material  40  and that emit green light  48 , and the blue subpixels of display  14  may have blue light-emitting diodes  30  that contain blue emissive material  40  and that emit blue light. Pixels with other numbers of subpixels and/or subpixels of different colors may be used, if desired. 
     A top view of an illustrative pixel having a blue subpixel B formed from a blue light-emitting diode, a green subpixel G formed from a green light-emitting diode, and a red subpixel R formed from a red light-emitting diode is shown in  FIG. 4 . Each subpixel may emit light  48  from the region overlapped by the anode  38  of the light-emitting diode  30  in that subpixel. The rest of pixel  22  is covered by pixel definition layer  44  and does not emit light. In pixel  22  of  FIG. 4 , for example, blue light is emitted from the area overlapping the blue light-emitting diode anode (the area labeled “B” in  FIG. 4 ), red light is emitted from the area overlapping the red light-emitting diode anode (the area labeled “R” in  FIG. 4 ), and green light is emitted from the area overlapping the green light-emitting diode anode (the area labeled “G” in  FIG. 4 ). The ratio of the diode areas (anode areas) emitting light  48  to the total area of pixel  22  is referred to as the fill factor of pixel  22 . Low fill factor displays are characterized by relatively large fractions of pixel real estate that do not emit light and therefore contribute to undesired screen door effects. If care is not taken, the fill factor of the pixels in an organic light-emitting diode display may be relatively small (e.g., 20-30%), particularly in high resolution displays of the type that may be desirable for use in head-mounted displays. 
     To minimize screen door effects and thereby enhance display quality for display  14 , pixels  22  of pixel array  20  in display  14  may be provided with light spreading structures that enhance the fill factor for pixels  22 . The light spreading structures may be formed from microlenses, a fiber bundle layer (sometimes referred to as a light guide bundle layer or light guide layer), or other optical structures that overlap pixel array  20  and that laterally spread the light  48  that is emitted from each light-emitting diode. This enhances the fill factor for the pixels of display  14  (e.g., the fill factor of display  14  may be at least 0.4, at least 0.5, at least 0.6, at least 0.7, at least 0.8, at least 0.9, at least 0.95, or at least 0.98 even if the fill factor of the underlying light-emitting diode structures is less than 0.3 or other relatively small value). 
     Fiber bundles may be formed from a set of parallel transparent fibers bound together with a polymer or other binder material. The fibers may, for example, be formed from transparent polymer or glass. After binding the fibers together to form a fiber bundle, the fiber bundle may be divided into individual fiber bundle layers by cutting the fiber bundle into slices (slicing perpendicular to the lengths of the fibers) and by polishing the cut slices. Fibers may have circular cross-sectional shapes, rectangular (e.g., square) cross-sectional shapes, or other suitable cross-sectional shapes. If desired, a bundle of light guides may be formed directly on the thin-film circuitry of a display (e.g., using microfabrication techniques). Fiber bundle layers may also be formed separately and laminated to a pixel array using an adhesive layer (e.g., a transparent overcoat layer) or spaced apart from the display (e.g., by an air gap). 
     A top view of an illustrative fiber bundle layer is shown in  FIG. 5 . As shown in  FIG. 5 , fiber bundle layer  50  may be formed from an array of fibers  52  that have been bound together using binder  54 . Fiber bundle layer  50  may be relatively wide in lateral dimensions X and Y and may be relatively thin in vertical dimension Z. Layer  50  may be planar (e.g., layer  50  may lie in the X-Y plane of  FIG. 5 ) so that layer  50  may be placed on the planar surface of pixel array  20 . 
     During operation, light  48  from underlying light-emitting diodes  30  propagates outwardly through fibers  52  in direction Z. This spreads the light from each light-emitting diode  30  in dimensions X and Y so that the light fills the entire exposed face of an associated overlapping fiber  52 . By lateralling spreading the light from light-emitting diodes  30  before this light is viewed by the user, the fraction of display surface area that is consumed by dark areas (see, e.g., pixel definition layer  44  of  FIG. 4 ) is minimized and fill factor is enhanced. 
     The light guiding properties of fibers  52  may be determined by the relative index of refraction values of fibers  52  and binder  54 . The index of refraction of fibers  52  may be na and the index of refraction of binder  52  may be nb. With one illustrative configuration, the value of nb may be less than na to promote light guiding within fibers  52  (along the Z axis of  FIG. 5 ) due to the principal of total internal reflection. The relative values of na and nb may be chosen so that the numerical aperture of fibers  52  is 0.66, 0.6-0.7, 0.6-0.8, 0.5-0.8, more than 0.5, less than 0.8, or other suitable value. It may be desirable to minimize the amount of area consumed by binder  54  relative to the amount of area consumed by fibers  52  in layer  50  to help minimize pixel fill factor as light travels through fiber bundle layer  60 . For example, binder  54  may consume less than 50% of the area of layer  50 , less than 30% of the area of layer  50 , less than 15%, of the area of layer  50 , or less than 5% of the area of layer  50  (as examples). 
     A cross-sectional side view of display  14  showing how fiber bundle layer  50  may be formed on top of overcoat layer  46  of pixel array  20  is shown in  FIG. 6 . Pixel array  20  may include an array of pixels  22  formed on layers(s)  60 . Layers  60  may include thin-film transistor circuitry  34 , substrate  32 , and the other layers of display structures under overcoat layer  46  that are shown in  FIG. 3  (as an example). 
     Each pixel  22  may include a set of red, green, and blue light-emitting diodes  30  that emits light  48 . Light  48  is guided upwardly along dimension Z within each overlapping fiber  52  and is emitted as light  60  at the exposed upper face  52 F of that fiber  52 . In the example of  FIG. 6 , there is a one-to-one relationship between the fibers  52  in layer  50  and the pixels  22  of pixel array  20 . If desired, there may be more fibers  52  than pixels  22  or more pixels  22  than fibers  52 . As an example, the density (number of fibers per unit area) of fibers  52  may be larger than the density of pixels  22  (number of pixels per unit area) by a factor of at least 2, at least 4, at least 10, 2-10, at least 20, less than 1000, or other suitable amount. In some configurations, each fiber  52  overlaps a respective subpixel in each pixel  22  or other suitable subset of a pixel. In configurations in which the density of pixels  22  is much larger than the density of pixels  22 , each fiber overlaps a relatively small fraction of a pixel and each pixel  22  overlaps multiple fibers  52  (e.g., each pixel  22  overlaps 2-100 fibers  52 , 2-30 fibers  52 , at least 2 fibers  52 , at least 5 fibers  52 , at least 15 fibers  52 , at least 30 fibers  52 , fewer than 200 fibers  52 , or other suitable number of fibers). Dashed lines  52 ′ show how multiple fibers  52  may overlap each pixel  22  (e.g., in a scenario in which the density of fibers  52  is larger than the density of pixels and/or subpixels in display  14 ). If desired, some or all of overcoat  46  may be removed (e.g., to space the lower surfaces of fibers  52  by an air gap from pixels  22 ) 
     The thickness T of fiber bindle layer  50  is preferably sufficiently large to ensure that light  48  is homogenized (scrambled) while propagating upwardly in direction Z. For example, thickness T may be 0.5 mm to 10 mm, 0.5 to 2 mm, at least 0.2 mm, at least 0.4 mm, at least 0.5 mm, 0.5 to 2 mm, less than 5 mm, less than 1 mm, or other suitable thickness. The lateral X and Y dimensions (dimension WP) of each pixel  22  and therefore the lateral X and Y dimensions (dimension WF) of each fiber  52  may be 30-70 microns, at least 10 microns, at least 20 microns, at least 30 microns, less than 100 microns, less than 50 microns, less than 30 microns, or other suitable size. Fibers  52  may have circular cross sections, rectangular cross sections (e.g., square, square with rounded corners, etc.), or other suitable shapes. 
       FIG. 7  is a cross-sectional side view of display  14  in an illustrative configuration in which light scattering structures have been formed from microlenses. As shown in  FIG. 7 , display  14  may include pixel array  20 . Pixel array  20  may be formed form an array of pixels  22  on layer(s)  60  (e.g., a substrate layer, one or more layers of thin-film circuitry, etc.). Each pixel  22  may contain red, green, and blue subpixels or may include subpixels of other colors. 
     A patterned layer of microlenses  70  may be formed on pixel array  20 . As one example, each pixel  22  may be overlapped by a corresponding microlens  70 . Configurations for display  14  in which each pixel  22  is overlapped by a different number of microlenses  70  (e.g., more than one microlens per pixel) may also be used. 
     Lenses  70  and pixels  22  may have lateral dimensions X and Y of 30-70 microns, at least 10 microns, at least 20 microns, at least 30 microns, less than 100 microns, less than 50 microns, less than 30 microns, or other suitable size. Light  48  that is emitted upwardly in direction Z may be laterally spread and collimated by passing through lenses  70 , as shown in  FIG. 7 . Lenses  70  may be formed from inorganic materials and/or organic materials (e.g., transparent polymer). 
     Lenses  70  may be covered with transparent coating layer  72 . Transparent coating layer  72  may be formed from a polymer or other material having an index of refraction n 2  that is more than the index of refraction n 1  of lenses  70  so that lenses  70  act as negative lenses and help to collimate (concentrate) emitted light towards user&#39;s eyes  18 . Because each lens  70  spreads light  48  laterally, light  48  will be emitted over portions of the surface of display  14  that otherwise would contain non-light-emitting structures such as portions of pixel definition layer  44 . Microlens  70  (or other light spreading structures such as fibers  52  in fiber bundle layer  50 ) therefore spread light laterally so that pixel fill factor is enhanced and screen door effects in display  14  are minimized. 
     Illustrative microlens layouts for display  14  in which each microlens covers a subset of a pixel are shown in  FIGS. 8 and 9 . In the example of  FIG. 8 , each pixel  22  has a red subpixel formed from a red diode R, a green subpixel formed from a green diode G, and a blue subpixel formed from a blue diode B and each of these subpixels is overlapped by a corresponding microlens  70 . In the example of  FIG. 9 , the blue diode B (e.g., the blue anode area) that forms the blue subpixel of pixel  22  is larger than the red and green diodes R and G (to help compensate for weaker blue organic light-emitting diode light emission). In this type of arrangement, a pair of microlenses  70  may overlap each blue light-emitting diode and a single respective microlens  70  may overlap each of the red and green light-emitting diodes. Other patterns of microlenses and light-emitting diodes may be used in forming display  14  if desired. For example, odd rows of pixel array  20  may contain alternating red and green subpixels and even rows in pixel array  20  may contain alternating green and blue subpixels, etc. In general, each microlens  70  may overlap 1-3 subpixels, fewer than 4 subpixels, more than 1 subpixel, or other suitable numbers of subpixels. The examples of  FIGS. 7 and 8  are merely illustrative. 
     The foregoing is merely illustrative and various modifications can be made to the described embodiments. The foregoing embodiments may be implemented individually or in any combination.

Metadata:
Filing Date: 20170920
Publication Date: 20211012
Grant Date: 20211012
Priority Date: 20170303
Inventors: CARBONE, GIOVANNI
CHEN, CHENG
DORJGOTOV, ENKHAMGALAN
Assignee: APPLE INC
CPC Classifications: [{"code": "G02B27/0172", "inventive": true, "first": false, "tree": "[]"}, {"code": "G02B3/0056", "inventive": true, "first": false, "tree": "[]"}, {"code": "G02B2027/012", "inventive": false, "first": false, "tree": "[]"}, {"code": "G02B27/0018", "inventive": true, "first": false, "tree": "[]"}, {"code": "G02B6/06", "inventive": true, "first": true, "tree": "[]"}, {"code": "G02B6/0006", "inventive": true, "first": true, "tree": "[]"}, {"code": "G09G2320/0257", "inventive": false, "first": false, "tree": "[]"}, {"code": "G09G3/3225", "inventive": true, "first": false, "tree": "[]"}, {"code": "G02B3/0056", "inventive": true, "first": false, "tree": "[]"}, {"code": "G09G2354/00", "inventive": false, "first": false, "tree": "[]"}, {"code": "G06F1/163", "inventive": true, "first": false, "tree": "[]"}, {"code": "G06F1/163", "inventive": true, "first": false, "tree": "[]"}, {"code": "G09G2320/0257", "inventive": false, "first": false, "tree": "[]"}, {"code": "G09G2354/00", "inventive": false, "first": false, "tree": "[]"}, {"code": "G02B3/0056", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01L27/3244", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01L51/5275", "inventive": true, "first": false, "tree": "[]"}, {"code": "G02B6/0006", "inventive": true, "first": true, "tree": "[]"}, {"code": "G09G3/3225", "inventive": true, "first": false, "tree": "[]"}, {"code": "H01L27/3216", "inventive": true, "first": false, "tree": "[]"}, {"code": "H10K59/352", "inventive": true, "first": false, "tree": "[]"}, {"code": "H10K50/858", "inventive": true, "first": false, "tree": "[]"}, {"code": "H10K59/12", "inventive": true, "first": false, "tree": "[]"}, {"code": "H10K59/35", "inventive": false, "first": false, "tree": "[]"}, {"code": "H10K59/12", "inventive": false, "first": false, "tree": "[]"}, {"code": "H10K59/879", "inventive": true, "first": false, "tree": "[]"}]
Family ID: 78007901