PATENT DOCUMENT

Publication Number: US-10690837-B2
Application Number: US-201615265361-A
Country: US
Kind Code: B2

Title: Backlist displays with bent light guide layers

Abstract:
A display such as a liquid crystal display may have an array of pixels that is illuminated using backlight illumination from a backlight. The backlight may have a light guide layer that distributes light from light-emitting diodes across the display. The light guide layer may have a planar portion that provides backlight illumination to the array of pixels and may have bent edge portions that curve out of the plane of the planar portion. Light scattering structures may be formed in the planar portion to extract backlight illumination from the light guide layer. A light sensor adjacent to the bent portion may monitor leaked light. The light guide layer may have two bent portions on opposing edges of the light guide layer.

Claims:
What is claimed is: 
     
       1. A display, comprising:
 an array of liquid crystal display pixels; 
 a backlight that supplies backlight illumination to the array of liquid crystal display pixels, wherein the backlight includes a light guide layer having first and second planar portions that are overlapped by the array of liquid crystal display pixels and a bent edge portion that extends between the first and second planar portions, wherein the first planar portion includes light-scattering structures, wherein the bent edge portion is free of light-scattering structures, wherein the backlight includes light-emitting diodes that are mounted on a printed circuit board and that emit light into an edge surface of the bent edge portion, and wherein the bent edge portion has a curved inner surface and an opposing curved outer surface; 
 a metal coating on the curved outer surface of the bent edge portion of the light guide layer; 
 a light detector adjacent to the bent edge portion that is configured to measure light leaking from the curved outer surface of the bent edge portion, wherein the metal coating is interposed between the bent edge portion and the light detector; 
 a support structure with a curved surface, wherein the support structure is interposed between the first and second planar portions; and 
 an elastomeric material interposed between the curved surface of the support structure and the curved inner surface of the bent edge portion. 
 
     
     
       2. The display defined in  claim 1 , the display further comprising a structure with a curved surface coated with metal adjacent to the curved inner surface of the bent edge portion. 
     
     
       3. The display defined in  claim 1  wherein the bent edge portion has a C shape. 
     
     
       4. The display defined in  claim 1  wherein the light-emitting diodes emit light in a direction and wherein the first and second planar portions extend along a dimension that is at a right angle to the direction. 
     
     
       5. An electronic device having an interior and an exterior, comprising:
 a housing having a front surface, a rear surface, and curved sidewalls that extend from the front surface to the rear surface, wherein the front surface, the rear surface, and the curved sidewalls separate the interior from the exterior, and wherein the front surface, the rear surface, and the curved sidewalls define a cavity; 
 electrical components in the cavity; 
 a display mounted in the housing that has an array of pixels and a backlight that supplies backlight illumination for the array of pixels, wherein the backlight includes a light guide layer with two bent edge portions on opposing edges of the light guide layer, wherein the bent edge portions each have an inner curved surface and an opposing outer curved surface, wherein the backlight includes a metal coating on the outer curved surface, and wherein the curved sidewalls accommodate the bent edge portions so that the outer curved surfaces do not contact the housing; and 
 at least one light detector adjacent to at least one of the bent edge portions that is configured to measure light leaking from a curved surface of that bent edge portion, wherein the metal coating is interposed between the at least one of the bent edge portions and the light detector. 
 
     
     
       6. The electronic device defined in  claim 5  wherein the backlight includes a plurality of light-emitting diodes with different emission spectra that emit light into edge surfaces of the two bent edge portions. 
     
     
       7. The electronic device defined in  claim 6  further comprising light guiding elements that couple light from the light-emitting diodes into the edge surfaces. 
     
     
       8. The electronic device defined in  claim 7  further comprising phosphor on the edge surfaces. 
     
     
       9. The electronic device defined in  claim 5  further comprising:
 a substrate; and 
 additional electrical components mounted on the substrate, wherein at least some of the substrate protrudes between portions of at least one of the bent edge portions. 
 
     
     
       10. The electronic device defined in  claim 9  further comprising adhesive that attaches at least one of the bent edge portions to the substrate. 
     
     
       11. The electronic device defined in  claim 5  wherein the light guide layer has a planar portion that is overlapped by the array of pixels, wherein the planar portion has light scattering structures that extract the backlight illumination from the planar portion, and wherein the bent edge portions of the light guide layer are free of light scattering structures. 
     
     
       12. An electronic device having an interior and an exterior, comprising:
 a housing having a sidewall, wherein the housing separates the interior from the exterior; 
 a display mounted in the housing, the display comprising:
 an array of liquid crystal display pixels; 
 a backlight that supplies backlight illumination for the array of liquid crystal display pixels, wherein the backlight includes a light guide layer having first and second planar portions that are overlapped by the array of liquid crystal display pixels and a bent edge portion having a curved inner surface and an opposing curved outer surface that extends between the first and second planar portions; 
 a metal coating on the curved outer surface of the light guide layer; 
 a light detector that measures light leakage from the curved outer surface, wherein the light detector is interposed between the curved outer surface and the sidewall and wherein the metal coating is interposed between the curved outer surface and the light detector; and 
 
 a printed circuit board interposed between the first and second planar portions of the light guide layer. 
 
     
     
       13. The display defined in  claim 12  wherein the backlight comprises light-emitting diodes that emit light into an edge surface of the bent edge portion. 
     
     
       14. The display defined in  claim 13  wherein the light-emitting diodes are mounted to the printed circuit board and wherein adhesive attaches the bent edge portion to the printed circuit board. 
     
     
       15. The display defined in  claim 14  further comprising:
 a flexible printed circuit to which the light-emitting diodes are mounted, wherein the flexible printed circuit is coupled to the printed circuit board. 
 
     
     
       16. The display defined in  claim 13  further comprising a metal support structure adjacent to the light-emitting diodes that dissipates heat from the light-emitting diodes. 
     
     
       17. The display defined in  claim 1 , wherein the elastomeric material is attached to the curved surface of the support structure and to the curved inner surface of the bent edge portion. 
     
     
       18. The electronic device defined in  claim 5  wherein the front surface, the rear surface, and the curved sidewalls of the housing fully surround the cavity.

Description:
This application claims the benefit of provisional patent application No. 62/352,640, filed Jun. 21, 2016, which is hereby incorporated by reference herein in its entirety. 
    
    
     BACKGROUND 
     This relates generally to electronic devices, and more particularly, to electronic devices with displays. 
     Electronic devices often include displays. For example, cellular telephones and portable computers often include displays for presenting information to a user. 
     Displays such as liquid crystal displays may include backlight units. A backlight unit may include a light source and a light guide for distributing light from the light source across the display. 
     It can be challenging to form a satisfactory backlight. If care is not taken, a backlight unit may consume more space than desired within an electronic device and may necessitate the use of relatively large display borders. 
     SUMMARY 
     A display such as a liquid crystal display may have an array of pixels that is illuminated using backlight illumination from a backlight. The backlight may have a light guide layer that distributes light from light-emitting diodes across the display. 
     The light guide layer may have a planar portion that provides backlight illumination to the array of pixels and may have a bent edge portion that curves out of the plane of the planar portion. Light scattering structures may be formed on the planar portion of the light guide layer to extract backlight illumination from the light guide layer. A light sensor adjacent to the bent portion may measure leaked light. These light measurements may be monitored to evaluate the color and intensity of backlight illumination. 
     The light guide layer may have two bent portions on opposing edges of the light guide layer. Bent portions may have a metal coating, may be adjacent to an air gap, and may be supported by elastomeric material. A light guide element may couple light from the light-emitting diodes into edge surfaces of the bent portions. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of an illustrative electronic device in accordance with an embodiment. 
         FIG. 2  is a cross-sectional side view of an illustrative display in accordance with an embodiment. 
         FIG. 3  is a diagram showing how a row of light-emitting diodes may emit light into an edge surface of a light guide layer in accordance with an embodiment. 
         FIGS. 4 and 5  are cross-sectional side views of illustrative light guide layers with bent edge portions in accordance with an embodiment. 
         FIG. 6  is a cross-sectional side view of an illustrative light guide layer with a bent region that is free of light scattering structures and a planar portion that contains light scattering structures in accordance with an embodiment. 
         FIGS. 7 and 8  are cross-sectional side views of illustrative bent edge portions of light guide layers showing how light-emitting diodes may be mounted to emit light into the light guide layers in accordance with an embodiment. 
         FIG. 9  is a cross-sectional side view of an illustrative light guide layer having a bent edge portion that has been secured using clamping structures in accordance with an embodiment. 
         FIGS. 10 and 11  are cross-sectional side views of illustrative light guide layers with bent portions and associated structures with matching curved surfaces in accordance with embodiments. 
         FIG. 12  is a cross-sectional view of an illustrative electronic device having a backlight with a light guide layer that receives light from light-emitting diodes located along two opposing light-guide layers in accordance with an embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     Electronic devices such as cellular telephones, computers, wristwatches, media players, televisions, and other electronic devices may include displays. The displays may be used to display images for a user and may be backlit. 
     An illustrative electronic device of the type that may have a backlit display is shown in  FIG. 1 . Electronic device  10  may be a computing device such as a laptop computer, a computer monitor containing an embedded computer, a tablet computer, a cellular telephone, a media player, or other handheld or portable electronic device, a smaller device such as a wristwatch device (e.g., a watch with a wrist strap), a pendant device, a headphone or earpiece device, a device embedded in eyeglasses or other equipment worn on a user&#39;s head, or other wearable or miniature device, a television, a computer display that does not contain an embedded computer, a gaming device, a navigation device, an embedded system such as a system in which electronic equipment with a display is mounted in a kiosk or automobile, equipment that implements the functionality of two or more of these devices, or other electronic equipment. In the illustrative configuration of  FIG. 1 , device  10  is a portable device such as a cellular telephone, media player, tablet computer, wrist device, or other portable computing device. Other configurations may be used for device  10  if desired. The example of  FIG. 1  is merely illustrative. 
     Device  10  may include a display such as display  14  mounted in housing  12 . Housing  12 , which may sometimes be referred to as an enclosure or case, may be formed of plastic, glass, ceramics, fiber composites, metal (e.g., stainless steel, aluminum, titanium, gold, etc.), other suitable materials, or a combination of any two or more of these materials. Housing  12  may be formed using a unibody configuration in which some or all of housing  12  is machined or molded as a single structure or may be formed using multiple structures (e.g., an internal frame structure, one or more structures that form exterior housing surfaces, etc.). 
     Display  14  may be a touch screen display that incorporates a layer of conductive capacitive touch sensor electrodes or other touch sensor components (e.g., resistive touch sensor components, acoustic touch sensor components, force-based touch sensor components, light-based touch sensor components, etc.) or may be a display that is not touch-sensitive. Capacitive touch screen electrodes may be formed from an array of indium tin oxide pads or other transparent conductive structures. 
     Display  14  may include an array of pixels formed from liquid crystal display (LCD) components or other suitable pixels that are backlit with backlight illumination. The array of pixels may be located in active area AA and may be used in displaying images for a user. Inactive border regions such as inactive areas IA of  FIG. 1  are free of pixels and do not display images for a user. Display  14  may have an outer layer such as a display cover layer that serves to protect display  14 . The underside of the display cover layer in inactive area IA may be coated with an opaque masking material such as black ink to help hide internal components from view. To provide display  14  with an attractive appearance, it may be desirable to minimize the width of inactive areas IA along some or all of the borers of display  14 . As an example, it may be desirable to minimize the widths of the inactive area IA along the left and right edges of display  14  (i.e., the edges of display  14  that run parallel to dimension Y in  FIG. 1 ). In this type of configuration, speaker ports, button openings, and other structures may be located in the inactive areas IA at the upper and lower ends of display  14 . 
     A cross-sectional side view of an illustrative backlit display is shown in  FIG. 2 . Display  14  of  FIG. 2  may produce images for viewing in direction  30  by a viewer such as user  28 . Display  14  may include backlight structures such as backlight unit  18  for producing backlight illumination  26 . Pixels P may be formed in an array in a display module such as display module  16 . Display module  16 , which may sometimes be referred to as a display layer or a display, may be an electrophoretic display, a liquid crystal display, or other display that has an array of individually controlled light modulating pixels. With one illustrative configuration display module  16  may be a liquid crystal display module having upper and lower polarizers, layers such as a color filter layer and a thin-film transistor layer between the upper and lower polarizers, and a layer of liquid crystal material between the color filter layer and thin-film transistor layer. Pixel electrodes on the thin-film transistor layer may be used to apply electric fields to portions of the liquid crystal layer associated with pixels P and thereby control light transmission (i.e., transmission of backlight illumination  26 ) through layer  16 . In general, display module  16  may be formed from any suitable backlit display panel with an array of pixels for presenting images to user  28 . The use of a liquid crystal display arrangement for forming display  14  is merely illustrative. 
     Backlight unit  18  (sometimes referred to as a backlight) may include a light guide layer such as light guide layer  22 . Light guide layer  22  may be a molded clear polymer light guide plate (e.g., a light guide layer formed from molded polymethylmethacrylate or other suitable polymer) or may be a thin flexible transparent polymer light guide film. The thickness of layer  22  may be 0.01 mm to 5 mm, may be less than 1 mm, less than 0.2 mm, less than 0.1 mm, less than 0.05 mm, more than 0.02 mm, or other suitable thickness. In active area AA, light guide layer  22  may have a planar shape (e.g., a shape that lies in the X-Y plane of  FIG. 2 ). Light from one or more light-emitting diodes or other suitable light sources may be emitted into light guide layer  22  and may be distributed laterally (e.g., in dimensions X and Y in the example of  FIG. 1 ) in accordance with the principal of total internal reflection. 
     The upper and/or lower surfaces of light guide layer  22  in the active area of display  14  may include light scattering features such as bumps, ridges, or other protrusions, pits, grooves, or other recesses, printed ink light scattering features, embedded light scattering structures such as bubbles or light-scattering particles, or other structures that help scatter light out of layer  22 . Light that is scattered out of layer  22  and that travels upwards in direction Z may serve as backlight illumination  26 . Reflector  24  may be located under light guide layer  22  and may be used to reflect light that has scattered downward out of layer  22  in direction −Z back in the upward direction (+Z) to serve as backlight illumination  26 . Optical films  20  in backlight unit  18  may be interposed between light guide layer  22  and display module  16 . Films  20  may include one or more layers such as a diffuser layer to homogenize backlight illumination  26 , prism films for collimating backlight illumination  26 , and compensation films for improving off-axis viewing performance. If desired, these films may be incorporated into other portions of display  14 . For example, a compensation film may be incorporated into a polarizer layer in display module  16 , etc. 
     A light source such as an array of one or more light-emitting diodes may be used in supplying light to the edge of light guide layer  22 . The light-emitting diodes may be colored diodes and/or white diodes. In some configurations, different light-emitting diodes may have different colors, and/or display  14  may have white light-emitting diodes of different color temperatures (i.e., different light-emitting diodes may have different light emission spectra). In the example, of  FIG. 3 , an array of light-emitting diodes  32  is being used to emit light  26 ′ into edge surface  34  of light guide layer  22 . Light  26 ′ is guided within light guide layer  22  by total internal reflection before being scattered out of light guide layer  22  by the light scattering features in layer  22  to serve as backlight illumination  26 . Light-emitting diodes  32  may be white light diodes, may be a mixture of white light diodes of different color temperatures (e.g., some warm and some cold), and/or may include light of different colors (e.g., red, green, and blue light). The ratio of light produced by different colors (color temperature) light-emitting diodes may be used to adjust the color (color temperature) of backlight illumination  26 . If desired, backlight  18  (e.g., light-emitting diodes  32 , films in the layers of backlight  18 , edge surfaces associated with these layers, etc.) may include photoluminescent materials to adjust backlight color (e.g., phosphors, quantum dot materials, etc.). 
     To help minimize the width of inactive area IA, light guide layer  22  may have an edge portion that is bent around a bend axis. Consider, as an example, light guide layer  22  of  FIG. 4 . Bent portion  22 B (sometimes referred to as bent inactive area edge portion  22 B or bent inactive border portion  22 B) is bent about bend axis  22  with a bend radius R. The bent shape of portion  22 B may have a smooth curved shape and its profile may form an arc of a circle or other smoothly bending shape. Bend axis  22  may run parallel to the edge of device  10  (i.e., along dimension Y in the example of  FIG. 4 , along dimension X, etc.). Bend radius R may be 0.1 to 10 mm, may be more than 0.5 mm, more than 1 mm, more than 2 mm, less than 4 mm, less than 3 mm, less than 2 mm, 0.5 to 3 mm, or other suitable amount. In general, bend radius R should not be too large so that space may be conserved within device  10  and should not be too small to avoid undesired light leakage. 
     Because of the bent shape of bent edge portion  22 B of light guide layer  22 , the width of active area IA (i.e., the width of area IA along dimension X of  FIG. 4  in this example) may be minimized. If desired, housing portion  12 ′ may overlap inactive area IA and may have a minimized width. In other configurations, the outermost layer of display  14  may extend over display  16  in active area AA and may extend over bent region  22 B and other internal components in inactive area IA. 
     Components such as components  44  may be mounted in the interior of housing  12 . Components  44  may include integrated circuits, connectors, and other electrical components. Components  44  may be mounted on substrates such as printed circuit board  42  and may, if desired, be received within region  46  in the interior of bent portion  22 B (i.e., a region that is adjacent to the inner curved surface of bent portion  22 B and that is at least partly surrounded by portion  22 B). Allowing at least some of printed circuit  42  to extend between opposing upper and lower portions of bent edge portion  22  as shown in  FIG. 4  may allow components to be efficiently mounted within device housing  12 . 
     As shown in  FIG. 4 , electrical components such as components  50  may also be mounted adjacent to the opposing outer curved surface of bent portion  22 B. During operation of backlight  18 , some of light  26 ′ such as light  54  may leak out of bent portion  22 B (e.g., out of the curved outer surface of portion  22 B). If desired, components  50  may be light detectors (e.g., photodiodes or groups of photodiodes) to measure the intensity and/or color of light  54 . Control circuitry in device  10  may use these measurements to ensure that backlight  26  has a desired intensity and/or color. For example, light measurements from components  50  may be used to determine whether to increase or decrease the light output from light-emitting diodes  32  and whether to change the relative intensities of light-emitting diodes of different colors to adjust the color of backlight  26 . 
     A reflective coating layer such as optional metal coating  52  may be formed on the outer surface (and, if desired, the inner surface) of bent portion  22 B of light guide layer  22  to help minimize light leakage in bent portion  22 B. 
     In the example of  FIG. 4 , bent portion  22 B has a C shape and makes a 180° turn (i.e., light  26 ′ is initially emitted from light-emitting diodes  32  in the X direction and, after passing through bent region  22  is distributed in the planar portion of light guide layer  22  in the −X direction.  FIG. 5  shows how bent portion  22 B may make a 90° bend rather than 180° bend. In this type of arrangement, light-emitting diode  32  emits light in upwards direction Z, at a right angle with respect to the direction in which the planar portion of light guide layer  22  extends (i.e., at a right angle with respect to the X and Y dimensions). Configurations in which light guide layer  22  is bent about bend axis  40  by more or less than 90° may also be used. As light from light-emitting diodes  32  passes through region  22 B, the light becomes mixed (homogenized), which helps reduce backlight hotspots. 
     As shown in  FIG. 6 , light guide layer  22  may have light extraction features such as light scattering structures  56 . In general, light guide layer  22  may have any suitable light scattering structures to help extract light from light guide layer  22 . The light scattering structures may be pits, grooves, or other recesses, bumps, ridges, or other protrusions, printed patterns, embedded voids or particles, etc. These light scattering structures may be varied in density across the surface of layer  22  to help ensure that light  26  is evenly distributed across the surface of backlight  18 . Light scattering structures may be formed on the upper and/or lower surfaces of light guide layer  22 . Light scattering structures  56  may be provided on the planar portion of light guide layer  22  under the array of pixels P. To minimize light leakage in bent region  22 B, region  22 B may be free of light scattering structures  56 . 
       FIG. 7  shows how light-emitting diodes  32  may be mounted to substrates such as flexible printed circuit  60 . Flexible printed circuit  60  may be formed from a sheet of polyimide or other flexible polymer layer. Flexible printed circuit  60  may be mounted to printed circuit board  42  (e.g., using solder, conductive adhesive, connectors, etc.). Components such as electrical component  44  may also be mounted to printed circuit board  42 . With this type of a configuration, flexible printed circuit  60  may serve as a substrate for an array of light-emitting diodes  32 . Light guide layer bent portion  22 B may be attached to printed circuit  60  and/or printed circuit  42  using adhesive  64  (e.g., liquid adhesive, pressure sensitive adhesive, etc.). Metal traces in printed circuit  60  and/or in printed circuit  42  (see, e.g., metal traces  62 ) may help dissipate heat generated by light-emitting diodes  32 . As shown in  FIG. 8 , flexible printed circuit  60  may be omitted. In this type of configuration, light-emitting diodes  32  may be mounted directly on printed circuit substrate  42  and adhesive  64  may be used to attach bent portion  22 B of light guide layer  22  to printed circuit board  42 . 
     If desired, clamps or other support structures may be used to support portions of backlight  18 . As shown in  FIG. 9 , for example, backlight  18  may have clamping structures such as clamps  68  and  70 . Clamps  68  and  70  may be formed from metal, plastic, or other suitable materials. Clamps  68  may be used to support the end of bent portion  22 B adjacent to active area AA. Clamps  70  may be used to support printed circuit  60  (e.g., a flexible printed circuit or a rigid printed circuit) and light-emitting diode  32 . With one illustrative arrangement, support structures such as clamps  70  (or at least the portion of clamps  70  that contacts light-emitting diode  32 ) may be formed from metal to help dissipate heat that is produced by light-emitting diode  32 . 
     As shown in the cross-sectional side view of  FIG. 10 , a support structure such as support structure  72  may be used to help support light guide layer  22  in bent portion  22 B. Curved outer surface  76  of support member  72  may have a curvature that closely matches the curvature of curved inner surface  78  of bent portion  22 B. A compressible material such as compressible layer  74  may be interposed between support structure  72  and bent portion  22 B to help support bent portion  22 B. Layer  74  may be formed from elastomeric polymer material such as silicon, elastomeric polymer foam, or other suitable material. 
     If desired, a light guiding element such as light guiding element  82  may be incorporated into backlight  18 . Element  82  may include a lens, a light guiding structure (e.g., a light funnel), and/or other structures for distributing light from light-emitting diode(s)  32  to edge surface  34  of light guide layer  22 . Edge surface  34  or other regions in backlight  18  may be coated with photoluminescent material  80  (e.g., phosphors, quantum dots, etc.) to create a desired color for backlight  26  (e.g., to create white backlight illumination from blue light emitted from one or more of light-emitting diodes  32 , etc.). Light guiding element  82  and/or material  80  may be omitted, if desired. 
     As shown in  FIG. 11 , curved outer surface  76  of structure  72  may be coated with a layer of reflective material such as coating  82 . Coating  82  may be a layer of metal or other material that helps reflect light that has exited bent portion  22 B of light guide layer  22  back into portion  22 B (i.e., reflective coating  82  may help improve light recycling). Light confinement in portion  22 B may be enhanced by ensuring that there is air  84  adjacent to the inner and/or outer surfaces of bent portion  22 B. The refractive index of layer  22  may be, for example, about 1.5. Air has an index of refraction of 1.0, so ensuring that air  84  is adjacent to bent portion  22 B of light guide plate  22  will enhance total internal reflection and thereby minimize light leakage. 
     If desired, light-emitting diodes  32  may be mounted along more than one edge of light guide layer  22 . As shown in  FIG. 12 , light-emitting diodes  32 L may supply light to bent portion  22 B-L along the left edge of light guide layer  22  and light-emitting diodes  32 R may supply light to bent portion  22 B-R along the opposing right edge of light guide layer  22 . By supplying light to opposing sides of light guide layer  22 , even and bright backlight illumination may be produced for display  14 . If desired, housing  12  may have curved sidewalls  12 SW that accommodate the curved shapes of bent portions  22 B-L and  22 B-R (i.e., sidewalls  12 SW may have curved sidewall shapes that allow bent portions  22 B-L and  22 B-R to protrude outwardly to efficiently use the interior space available in housing  12  without striking the inner surface of housing  12  in a way that might create light leakage). Other shapes may be used for housing  12 , if desired. The configuration of  FIG. 12  is 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: 20160914
Publication Date: 20200623
Grant Date: 20200623
Priority Date: 20160621
Inventors: LIU, RONG
LIANG, MENGYANG
SUN, YU P.
QI, JUN
YIN, VICTOR H.
Assignee: APPLE INC
CPC Classifications: [{"code": "G02F1/13318", "inventive": true, "first": true, "tree": "[]"}, {"code": "G02F1/1336", "inventive": false, "first": false, "tree": "[]"}, {"code": "G02F2201/58", "inventive": false, "first": false, "tree": "[]"}, {"code": "G02F1/13318", "inventive": true, "first": false, "tree": "[]"}, {"code": "G02B6/0026", "inventive": true, "first": false, "tree": "[]"}, {"code": "G02B6/0081", "inventive": true, "first": false, "tree": "[]"}, {"code": "G02B6/0081", "inventive": true, "first": true, "tree": "[]"}, {"code": "G02F1/1336", "inventive": false, "first": false, "tree": "[]"}, {"code": "G02B6/4286", "inventive": false, "first": false, "tree": "[]"}, {"code": "G02B6/0026", "inventive": false, "first": false, "tree": "[]"}, {"code": "G02B6/0045", "inventive": false, "first": false, "tree": "[]"}, {"code": "G02B6/4289", "inventive": false, "first": false, "tree": "[]"}, {"code": "G02F2201/58", "inventive": false, "first": false, "tree": "[]"}, {"code": "G02B6/0026", "inventive": true, "first": false, "tree": "[]"}, {"code": "G02F1/1336", "inventive": false, "first": false, "tree": "[]"}, {"code": "G02F1/13318", "inventive": true, "first": false, "tree": "[]"}, {"code": "G02B6/0081", "inventive": true, "first": true, "tree": "[]"}, {"code": "G02F2201/58", "inventive": false, "first": false, "tree": "[]"}]
Family ID: 60660196