US20150268754A1 - Image sensor panel and method for capturing graphical information using same - Google Patents
Image sensor panel and method for capturing graphical information using same Download PDFInfo
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- US20150268754A1 US20150268754A1 US14/690,495 US201514690495A US2015268754A1 US 20150268754 A1 US20150268754 A1 US 20150268754A1 US 201514690495 A US201514690495 A US 201514690495A US 2015268754 A1 US2015268754 A1 US 2015268754A1
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Definitions
- the present disclosure relates to an image sensor panel and a method for capturing graphical information using the image sensor panel. More particularly, the present disclosure relates to an image sensor panel including an array of photosensitive pixels, and a method for capturing graphical information from a two-dimensional information bearing substrate (IBS) using the image sensor panel.
- IBS information bearing substrate
- Flat panel displays have been used ubiquitously as a standard output device for various electronic devices, such as, personal computers, laptop computers, smartphones, smart watches, televisions, handheld video game devices, a public information display, and the like.
- flat panel displays have been developed to include input functionalities (e.g., touch screens that are sensitive to either pressure or capacitance changes in response to user touches or interactions), such that the flat panel displays can be used as both an input (pointer) device and an output device.
- a touch screen can interact with the user and detect one or more of user's finger point contacts and/or drawings on the screen as input signals.
- a touch screen cannot capture graphical information from the two-dimensional surface of an information bearing substrate.
- the present disclosure provides an image sensor panel, comprising a substrate; and a sensor array on the substrate, the sensor array including a plurality of photosensitive pixels.
- the substrate comprises a first region defined by the sensor array and a second region other than the first region.
- the second region is optically transparent and has an area greater than that of the first region.
- the substrate comprises one of glass, plastic, and a combination thereof.
- the image sensor panel further comprises a plurality of column conductive lines and a plurality of row conductive lines intersecting the column conductive lines.
- the photosensitive pixels are formed proximate intersections of the column and row conductive lines.
- the column and row conductive lines comprise an electrically conductive material that is optically transparent.
- each of the photosensitive pixels has a stacked structure comprising a control component and a photosensitive component.
- the control component is formed on the substrate and the photosensitive component is formed on the control component.
- the photosensitive component is formed on the substrate and the control component is formed on the photosensitive component.
- the control component comprises three thin film transistors.
- the stacked structure further comprises a dielectric layer between the control component and the photosensitive component, the dielectric layer having a via hole, and wherein the control component is electrically coupled to the photosensitive component through the via hole.
- the dielectric layer has a thickness between 0.3 to 2.0 microns or at least 0.3 microns.
- the present disclosure provides a two-dimensional image scanner comprising a surface light source having a light-emitting surface, and the image sensor panel as summarized above, the image sensor panel being disposed on the light emitting surface of the surface light source.
- the image scanner further comprises a light block component formed on the substrate within the first region and between the light emitting surface of the surface light source and the photosensitive pixels of the sensor array.
- the present disclosure provides a bidirectional display device, comprising a display module comprising a plurality of display pixels separated by a black matrix, wherein the display pixels emit light from a first surface of the display module; and the image sensor panel as summarized above, the image sensor panel being attached to the first surface of display module.
- the photosensitive pixels of the image sensor panel are aligned with the black matrix.
- the display pixels of the display module are aligned with the second region of the substrate.
- the image sensor panel further comprises a light block component formed on the substrate of the image sensor panel within the first region and between the display module and the photosensitive pixels of the sensor array.
- the present disclosure provides a bidirectional display device, comprising: a display module comprising a plurality of display pixels configured to emit light from a first surface of the display module; and an image sensor panel comprising a substrate and a plurality of photosensitive pixels on the substrate, the substrate comprising a first region defined by the photosensitive pixels and a second region other than the first region, the second region being optically transparent and having an area greater than that of the first region; wherein the image sensor panel is attached to the first surface of the display module.
- the display module comprises a liquid crystal display (LCD) module, and the display pixels are separated by a black matrix of the liquid crystal display module; and wherein the photosensitive pixels of the image sensor panel are aligned to the black matrix of the display module.
- the image sensor panel further comprises a light block component formed on the substrate of the image sensor panel within the first region and between the display module and the photosensitive pixels of the sensor array.
- the display module comprises an organic light emitting diode (OLED) display and the display pixels of the display module are aligned with the second region of the substrate.
- the image sensor panel further comprises a light block component formed on the substrate of the image sensor panel within the first region and between the display module and the photosensitive pixels of the sensor array.
- the display pixels are configured to have a display resolution and the photosensitive pixels are configured to have a sensor resolution, and wherein the sensor resolution is at least 1.5 times of the display resolution.
- the present disclosure provides a method for capturing graphical information from an information bearing substrate, the method comprising: contacting an information bearing substrate with a surface of an image sensor panel, the image sensor panel comprising an array of photosensitive pixels and an optically transparent region between the photosensitive pixels; emitting probing light from a light source to the information bearing substrate through the optically transparent region of the image sensor panel; detecting reflected light from the information bearing substrate using the photosensitive pixels to obtain raw image data; generating a digital image data file from the raw image data; and storing the digital image data file in a computer storage medium.
- the method further comprises, after contacting the information bearing substrate with the surface of the image sensor panel, determining a boundary of the information bearing substrate.
- emitting the probing light comprises emitting the probing light from a portion of the light source that corresponds to a surface area defined by the boundary of the information bearing substrate.
- the method further comprises determining conformity of the information bearing substrate placed on the image sensor panel.
- the method further comprises: loading the digital image data file from the computer storage medium; and extracting textual information from the digital image data file by performing an optical character recognition process.
- the method further comprises: generating a composite data file including image data and the extracted textual information; and storing the composite data file in the computer storage medium.
- the method further comprises: generating a text data file including the extracted textual information; and storing the text data file in the computer storage medium.
- emitting the probing light comprises emitting the probing light having an intensity-time profile of a Gaussian type with a half-width of less than 1.0 second.
- emitting the probing light comprises sequentially emitting first color probing light, second color probing light, and third color probing light to the information bearing substrate.
- detecting the reflected light comprises sequentially detecting first color reflected light, second color reflected light, and third color reflected light from the information bearing substrate.
- the present disclosure provides a computer program product stored in a computer memory, the computer program product when executed by a processor causing the processor to perform the method for capturing graphical information as summarized above.
- the present disclosure provides an image sensor panel, comprising a transparent substrate having a first region and a second region, and an array of photosensitive pixels disposed on the transparent substrate within the first region, the photosensitive pixels being separated from each other by the second region.
- the second region has an area greater than that of the first region.
- FIG. 1 illustrates a sectional view of an input device including an image sensor panel, in accordance with an embodiment of the present disclosure.
- FIG. 2 illustrates a plane view of an image sensor panel, in accordance with an embodiment of the present disclosure.
- FIG. 3 illustrates a sectional view of a sensor pixel of the image sensor panel as illustrated in FIG. 2 .
- FIGS. 4A through 4D illustrate a layered structure of a sensor pixel, read by a single thin film transistor (TFT), in accordance with an embodiment of the present disclosure.
- TFT thin film transistor
- FIG. 5A illustrates a sectional view of an image sensor panel in combination with a liquid crystal display (LCD) module, in accordance with embodiments of the present disclosure.
- LCD liquid crystal display
- FIG. 5B illustrates a sectional view of an image sensor panel in combination with an organic light emitting diode (OLED) display module, in accordance with embodiments of the present disclosure
- FIG. 6 illustrates a plane view of a sensor pixel array aligned with a black matrix of a display module, in accordance with an embodiment of the present disclosure.
- FIG. 7 illustrates a plane view of a sensor pixel array slightly misaligned with a black matrix of a display module, in accordance with an embodiment of the present disclosure.
- FIG. 8 illustrates a plane view of a sensor pixel array aligned with a black matrix of a display module, in accordance with an embodiment of the present disclosure.
- FIG. 9 illustrates a schematic circuit diagram of a sensor pixel, read by three thin film transistors (TFTs), in accordance with an embodiment of the present disclosure.
- FIGS. 10A through 10D illustrate a layered structure of the sensor pixel as illustrated in FIG. 9 .
- FIG. 11 illustrates a perspective view of a laptop computer comprising an image sensor panel in combination with a display module, when scanning image of an information bearing substrate, in accordance with an embodiment of the present disclosure.
- FIG. 12 illustrates a perspective view of a smartphone device comprising an image sensor panel in combination with a display module, when scanning image of an information bearing substrate, in accordance with an embodiment of the present disclosure.
- FIG. 13 illustrates a perspective view of a smartphone device comprising an image sensor panel in combination with a display module, when detecting a user's finger drawing, in accordance with an embodiment of the present disclosure.
- FIG. 14 illustrates a block diagram of an electronic device in accordance with an embodiment of the present disclosure.
- FIG. 15 illustrates a flow diagram for capturing graphical information from an information bearing substrate in accordance with an embodiment of the present disclosure.
- FIGS. 16A and 16B illustrate a bidirectional display device configured as a 3D image sensor, in accordance with certain embodiments of the present disclosure.
- the term “information bearing substrate” (or IBS) is used herein to refer to any tangible medium having a 2D surface that bears textual, graphical, or other information printed or otherwise attached thereto.
- the information bearing substrate can be a document, a photograph, a drawing, a business card, a credit card, a smartphone display screen, a surface of a merchandize package box, a book cover/page, a finger/palm/foot surface, and the like.
- image sensor panel is used herein to refer to an image sensor panel device that includes a plurality of photosensitive pixels (or sensor pixels) formed on a glass/plastic substrate, as shown and described herein.
- bidirectional display is used herein to refer to a panel device that includes both a display panel and an image sensor panel, as shown and described herein. In different cases, a bidirectional display may be flat, flexible, or curved.
- FIG. 1 illustrates a sectional view of an input device 1 including an image sensor panel 100 , in accordance with an embodiment of the present disclosure.
- input device 1 includes image sensor panel (ISP) 100 and a backlight module 200 , both being enclosed in a housing 300 with a surface of ISP 100 being optically exposed to the exterior environment.
- ISP image sensor panel
- Backlight module 200 comprises a light guide plate (having a square shape, a rectangular shape, or other suitable shapes) with a plurality of light reflectors 205 formed at a bottom surface of the light guide plate, and at least one light source 250 , which can be one or more point light sources (e.g., LEDs) at one or more corners of the light guide plate or a linear light source (e.g., a cold cathode fluorescent lamp or CCFL) at a side of the light guide plate.
- a light guide plate having a square shape, a rectangular shape, or other suitable shapes
- a plurality of light reflectors 205 formed at a bottom surface of the light guide plate
- at least one light source 250 which can be one or more point light sources (e.g., LEDs) at one or more corners of the light guide plate or a linear light source (e.g., a cold cathode fluorescent lamp or CCFL) at a side of the light guide plate.
- a linear light source e.g
- Backlight module 200 emits a uniform planar light source along a first direction 20 from a top surface of the light guide plate by guiding light 210 from light source 250 and reflecting light 210 using reflectors 205 .
- backlight module 200 includes a single point light source 250 , which emits light 250 of a white color.
- backlight module 200 includes four point light sources 250 disposed proximate the four corners of a square/rectangular light guide plate, the light sources 250 respectfully emitting light of, for example, red, green, blue, and white (or infrared) colors.
- ISP 100 includes transparent areas such that the uniform planar light source generated from backlight module 200 can penetrate therethrough and hit a document 10 placed on the top surface of the light guide plate.
- the planar light source is then reflected from document 10 along a second direction 30 .
- the reflected light optically carries information attached to document 10 .
- Such information carried by the reflected light can be detected by photosensitive pixels formed on the ISP 100 , as further detailed below.
- FIG. 2 illustrates a plane view of an image sensor panel (ISP) 100 , in accordance with an embodiment of the present disclosure.
- ISP 100 includes a transparent substrate 110 , an array of sensor pixels 120 , and a plurality of column conductive lines (columns) 130 and row conductive lines (rows) 140 electrically coupled with the sensor pixels 120 .
- Sensor pixels 120 may be formed proximate intersections of columns 130 and rows 140 .
- sensor pixels 120 can be arranged on a first region of substrate 110 to form a square lattice structure, a rectangular lattice structure, a triangular lattice structure, a hexagonal lattice structure, and the like.
- Each of sensor pixels 120 can be configured to have, for example, a circular shape, an oval shape, a square shape, a rectangular shape having rounded corners, or any other suitable shapes.
- the first region of substrate 110 is rendered optically opaque due to the presence of sensor pixels 120 .
- ISP 100 is devoid of light emitting elements and optically transparent at non-sensor pixel regions (i.e., other than the first region).
- each sensor pixel may have a sensor pixel size S (e.g., a width or diameter, depending on the pixel shape, of about 10-40 um) and two neighboring sensor pixels may be separated by a pixel separation distance P.
- Pixel separation distance P may be about 1.5 to 5 times of pixel size S.
- the sensor pixels 120 are separated so as to leave transparent regions 150 (i.e., the non-sensor pixel regions) to allow at least a portion of the surface light source from backlight module 200 to penetrate therethrough.
- FIG. 3 illustrates a sectional view of a sensor pixel 120 of the image sensor panel 100 as illustrated in FIG. 2 .
- sensor pixel 120 may be formed on a TFT backplane 121 and include a bottom electrode 122 on TFT backplane 121 , an interlayer 123 on bottom electrode 122 , a photosensitive layer 124 on interlayer 123 , a top electrode 125 on photosensitive layer 124 , and a protective layer 126 on top electrode 125 .
- Photosensitive layer 124 may comprise semiconductor materials, e.g., amorphous silicon (a-Si), low temperature polysilicon (LTPS), metal oxide (ZnO, IGZO, etc.), and the like, which form a PIN structure.
- a-Si amorphous silicon
- LTPS low temperature polysilicon
- ZnO, IGZO, etc. metal oxide
- photosensitive layer 124 may comprise organic photon sensitive materials.
- Interlayer 123 is optional and may comprise PEDOT:PSS.
- Protective layer 126 is optional and may comprise a transparent laminating material or alternatively a non-transparent (opaque) resin material so as to form a light block.
- a light source e.g., a surface light source from backlight module 200
- the light source is then reflected from IBS 10 , carrying information from IBS 10 and entering into sensor pixels 120 along a second direction 30 .
- darker markings on IBS 10 reflect less light (lower intensity), while brighter markings on IBS 10 reflect more light (higher intensity).
- photosensitive layer 124 In response to the reflected light, photosensitive layer 124 detects the information carried by the reflected light (e.g., intensity of the reflected light) and generates electrons, thereby forming a photo current that flows vertically and is detected or read through column 130 and row 140 .
- top electrode 125 and/or protective layer 126 may comprise an optically non-transparent material, thereby acting as a light block, while TFT layer 121 and bottom electrode 122 may comprise optically transparent materials.
- first direction 20 of light source and second direction 30 of reflected light may be opposite to those illustrated in FIG. 3 .
- top electrode 125 and protective layer 126 may comprise optically transparent materials
- bottom electrode 122 and/or TFT layer 121 may comprise an optically non-transparent (or opaque) material, thereby acting as a light block.
- FIGS. 4A through 4D illustrate a layered structure of a sensor pixel 120 , read by a single thin film transistor (TFT) 121 , in accordance with an embodiment of the present disclosure.
- FIG. 4A illustrates the layered structure of a TFT backplane, before formation of a photosensitive layer 124 .
- FIG. 4B illustrates a section view of the layered structure taken from line B-B of FIG. 4A .
- FIG. 4C illustrates the layered structure, after formation of photosensitive layer 124 on the TFT backplane.
- FIG. 4D illustrates a section view of the layered structure taken from line D-D of FIG. 4D .
- sensor pixel 120 is formed on a transparent substrate 110 (made of, for example, glass or plastic).
- a gate electrode 121 G is formed on substrate 110
- a first transparent dielectric layer 112 (made of, for example, SiO 2 ) is formed on gate electrode 121 G covering substrate 110 .
- a channel layer 121 C is formed and patterned on dielectric layer 112 and at a position that is aligned with gate electrode 121 G.
- Channel layer 121 C comprises a semiconductor material of, e.g., amorphous silicon (s-Si), low temperature polysilicon (LTPS), metal oxide (ZnO, IGZO, etc.), and the like.
- Source/drain electrodes 121 SD and 121 DS are formed on dielectric layer 112 .
- Source/drain electrodes 121 SD and 121 DS are separated by channel layer 121 C, and electrically coupled to two opposing sides of channel layer 121 C.
- a second transparent dielectric layer 114 is formed on channel layer 121 C and source/drain electrodes 121 SD and 121 DS.
- Gate electrode 121 G, channel layer 121 C, source/drain electrodes 121 SD and 121 DS constitute TFT 121 .
- a sensor pixel electrode 122 is formed on second transparent dielectric layer 114 and is electrically coupled to source/drain electrode 121 SD through a via hole 122 V formed in dielectric layer 114 .
- gate electrode 121 G is electrically coupled to row line 140
- source/drain electrode 121 DS is electrically coupled to column line 130 .
- via hole 122 V may be formed by selectively etching dielectric layer 114 to expose a portion of source/drain electrode 121 SD prior to the formation of sensor pixel electrode 122 .
- Sensor pixel electrode 122 may be formed by depositing a metallic material on dielectric layer 114 , filling via hole 122 V, and subsequently patterned into, for example, a square shape having round corners, as shown in FIG.
- a third transparent dielectric layer 116 may be formed and etched to define a shape of the pixel electrode 122 .
- dielectric layer 116 and sensor pixel electrode 122 may be planarized for further processing.
- a photosensitive layer 124 is formed on pixel electrode 122
- a common electrode 125 is formed on photosensitive layer 124 .
- Common electrode 125 may be coupled to a common ground (i.e., 0 Volt).
- photosensitive layer 124 may include a first semiconductor layer (having either n- or p-type conductivity) deposited on pixel electrode 122 , an intrinsic semiconductor layer deposited on the first semiconductor layer, and a second semiconductor layer (having a conductivity type opposite to that of the first semiconductor layer) deposited on the intrinsic semiconductor layer.
- the three layers form a photodiode having a PIN structure. As such, in response to impinging light, the PIN structure can generate photocurrent that flows vertically. It is appreciated that the intrinsic semiconductor layer may not be necessary in certain applications.
- the photosensitive layer 124 is etched and patterned in a photolithography process, so as to form an array of sensor pixels 120 as shown in FIG. 2 .
- the photosensitive layer 124 may be a dual-band sensor, having two PIN structures (e.g., a vertical structure of p-i-n-i-p or n-i-p-i-n, or a horizontal structure of p-i-n and p-i-n), one PIN structure being sensitive to, for example, visible light (having a wavelength ranging between 400 nm and 700 nm), while the other PIN structure being sensitive to, for example, infrared light (having a wavelength ranging between 700 nm and 1 mm).
- the two PIN structures can be arranged vertically into a single stacked structure or horizontally into two stacked structures neighboring each other.
- the photosensitive layer 124 may comprise silicon, germanium, selenium, SiGe, GaAs, InGaAs, SiC, GaN, CuO, CuSe, CuTe, CdS, CdSe, CdTe, InSb, CuInGaS, CuInGaSe, CuInGaTe, TeGeHg, CuInSe, CuInS, CuInTe, HgCdTe, or combinations thereof in an amorphous, crystalline, or polycrystalline form.
- amorphous silicon (a-Si) p-i-n stack can be formed directly using a PECVD process.
- sensing elements can be formed with a sensing function layer sandwiched between the top and bottom electrodes.
- a thermal image array can be formed with a thermo-electric layer that is sensitive to infrared light.
- a scintillator film sensitive to X-ray can be formed in place of the p-i-n structure. See, for example, WO 2014/093244, published on Jun. 19, 2014, which is incorporated herein by reference.
- the photosensitive layer 124 may comprises a mixture of a p-type polymeric organic semiconductor (e.g., poly (3-hexylthiophene) or poly (3-hexylthiophene-2,5-diyl), also known as P3HT) and an n-type polymeric organic semiconductors (e.g., [6,6]-phenyl-methyl-butanoate C6i, also known as PCBs).
- a p-type polymeric organic semiconductor e.g., poly (3-hexylthiophene) or poly (3-hexylthiophene-2,5-diyl
- P3HT poly(2-hexylthiophene)
- n-type polymeric organic semiconductors e.g., [6,6]-phenyl-methyl-butanoate C6i, also known as PCBs.
- FIGS. 5A and 5B respectively illustrate a sectional view of an image sensor panel 100 in combination with a liquid crystal display (LCD) module 400 and an organic light emitting diode (OLED) display module 500 , in accordance with embodiments of the present disclosure.
- LCD module 400 includes a backlight module 410 configured to emit a planar light source 20 of, for example, white color.
- Backlight module 410 may additionally include a first polarizer so as to make planar light source 20 linearly polarized along a first direction.
- LCD module 400 further includes a TFT backplane 420 on backlight module 410 , a liquid crystal material 430 on TFT backplane 420 , and a color filter layer 440 on liquid crystal material 430 .
- TFT backplane 420 includes display pixel electrodes to control the rotation orientation of liquid crystal material 430 so as to rotate the polarization direction of planar light source 20 at different pixel locations.
- Color filter 440 includes an array of color pixels (e.g., red, green, and blue) separated by a black matrix, each color pixel corresponding to a display pixel electrode of TFT backplane 420 , so as to generate colored output for LCD module 400 .
- Color filter 400 may additionally include a second polarizer having a polarization direction perpendicular to that of the first polarizer of backlight module 410 .
- an image sensor panel (ISP) 100 is disposed on color filter 440 and is enclosed in a housing 300 together with LCD module 400 . It is appreciated that, in certain embodiments, ISP 100 can be formed and integrated with color filter 440 . An upper surface of ISP 100 is optically exposed to the exterior of housing 300 so as to allow light source 20 to penetrate therethrough. As discussed above, ISP 100 includes a plurality of photosensitive pixels separated from each other to leave optically transparent regions. In one embodiment, the photosensitive pixels of ISP 100 are aligned with the black matrix of color filter 440 so as not to interfere with the display quality.
- display module 400 may still include an optically transparent capacitive touch panel (not shown).
- the capacitive touch panel may be disposed on display module 400 and between ISP 100 and color filter 440 .
- the capacitive touch panel may be disposed on ISP 100 and can be in contact with IBS 10 when placed thereon.
- OLED display module 500 includes a TFT backplane 510 having a plurality of light emitting pixels formed thereon and a cover glass 520 on TFT backplane 510 .
- an image sensor panel (ISP) 100 is disposed on cover glass 520 and is enclosed in a housing 300 together with OLED display module 500 .
- ISP 100 can be formed on and integrated with cover glass 520 .
- An upper surface of ISP 100 is optically exposed to the exterior of housing 300 so as to allow light source 20 to penetrate therethrough.
- ISP 100 includes a plurality of photosensitive pixels separated from each other to leave transparent regions. In one embodiment, the transparent regions (i.e., the area between photosensitive pixels) of ISP 100 are aligned with light emitting pixels of OLED display module, so as maintain display quality substantially unaffected.
- display module 500 may additionally include an optically transparent capacitive touch panel (not shown).
- the capacitive touch panel may be disposed on display module 500 and between ISP 100 and cover glass 520 .
- the capacitive touch panel may be disposed on ISP 100 and can be in contact with IBS 10 when placed thereon.
- an information bearing substrate (IBS) 10 such as a document, can be placed on ISP 100 with the information bearing surface contacting an upper surface of ISP 100 , such that planar light source 20 can be reflected from IBS 10 to form reflected light 30 .
- Sensor pixels of ISP 100 can then detect reflected light 30 from IBS 10 , thereby capturing textual or graphical information attached to the information bearing surface of IBS 10 .
- FIG. 6 illustrates a plane view of a sensor pixel array aligned with a black matrix of a display module, in accordance with an embodiment of the present disclosure.
- FIG. 7 illustrates a plane view of a sensor pixel array slightly misaligned with a black matrix of a display module, in accordance with an embodiment of the present disclosure.
- FIG. 8 illustrates a plane view of a sensor pixel array aligned with a black matrix of a display module, in accordance with an embodiment of the present disclosure.
- a color display pixel 440 includes a red sub-pixel 442 , a green sub-pixel 444 , and a blue sub-pixel 446 .
- Color display pixel 440 may have a pixel size D (e.g., length or width) and a sensor pixel 120 may have a sensor pixel size S (e.g., diameter).
- sensor pixels 120 are separated with each other by about D/3.
- sensor pixels 120 are separated with each other by about D/2. As shown in FIG. 8 , in still another embodiment, sensor pixels 120 are separated with each other by about 2D/3.
- the image sensor panel of the present disclosure can have a sensing resolution (monochrome) that is about double or triple of the display resolution. It is appreciated that color filters can be formed on sensor pixels 120 so as to capture colorful images using the image sensor panel of the present disclosure.
- sub-pixels 442 , 444 , and 446 are separated with each other by a black matrix 448 .
- all sensor pixels 120 are aligned with black matrix 448 .
- sensor pixel size S may be slightly greater than a width of black matrix 448 and thus slightly overlap with display pixels 440 , the display quality is substantially unaffected, because at least 90% of the display's light emitting area is not obstructed by sensor pixels 120 .
- some of sensor pixels 120 are misaligned with black matrix 448 .
- one of sensor pixels 120 overlaps with green sub-pixel 444 .
- the display quality e.g., homogeneity
- the display quality can still be substantially unaffected, because sensor pixel size S may be much smaller than display pixel size D.
- the display quality can be adjusted and fine tuned by calibrating the emission intension of individual display pixels 440 after an image sensor panel is disposed and adhered onto a display module.
- sub-pixels 442 , 444 , and 446 are separated with each other by a black matrix 448 and all sensor pixels 120 are aligned with black matrix 448 .
- sensor resolution is about 1 . 5 times of the display resolution.
- FIG. 9 illustrates a schematic circuit of a sensor pixel 120 , read by three thin film transistors (TFTs), in accordance with an embodiment of the present disclosure.
- sensor pixel 120 includes a first TFT 910 , a second TFT 920 , a third TFT 930 , and a thin film photodiode 950 .
- First TFT 910 , second TFT 920 , and third TFT 930 are formed on a glass substrate 110 , while thin film photodiode 950 is stacked above first, second, and third TFTs 910 , 920 , and 930 .
- the gate of first TFT 910 is coupled to row 140 .
- the drain of first TFT 910 is coupled to column 130 .
- the source of first TFT 910 is coupled to the drain of second TFT 920 .
- the source of second TFT 920 is coupled to a voltage source VDD or 922 .
- the gate of second TFT 920 is coupled to a node 940 .
- the gate of third TFT 930 is coupled to a reset signal line 934 .
- the source of third TFT 930 is coupled to a reset voltage VRST or 932 .
- the drain of third TFT 930 is coupled with node 940 .
- the cathode of photodiode 950 is coupled to node 940 .
- the anode of photodiode 950 is coupled to a common ground 905 .
- Third TFT 930 acts as a switch to reset photodiode 950 .
- third TFT 930 is turned on by an ON signal sent from reset signal line 934 , photodiode 950 is connected to the reset voltage 932 (or power supply), thereby clearing charge accumulated on node 940 .
- Second TFT 920 acts as a buffer (e.g., a source follower) and an amplifier, which allows pixel voltage of photodiode 950 to be observed without removing the accumulated charge.
- First TFT 910 acts as a switch to select one sensor pixel from an array of sensor pixels coupled with columns 130 and rows 140 , so as to be read the selected sensor pixel.
- first TFT 910 When first TFT 910 is turned on in response to an ON signal from row 140 , information corresponding to the pixel voltage of photodiode 950 can be measured through column 130 .
- voltage source VDD may be tied to the reset voltage 932 (or power supply) of third TFT 930 .
- FIGS. 10A through 10D illustrate a layered structure of sensor pixel 120 shown in FIG. 9 .
- the electrically conductive lines e.g., signal lines, metallic interconnects, etc.
- the electrically conductive lines have a line width of at least 5 um and a line separation of at least 3 um.
- a gate electrode 911 of first TFT 910 a gate electrode 921 of second TFT 920 , and a gate electrode 931 of third TFT 930 are formed on different locations of substrate 110 .
- reset signal line 934 is formed on substrate 110 , linearly traversing along a rear portion of sensor pixel 120 , and is electrically coupled to gate electrode 931 through interconnect 936 .
- Row conductive line 140 is formed on substrate 110 , linearly traversing a front portion of sensor pixel 120 , and is electrically coupled to gate electrode 911 through a metallic interconnection 916 .
- a metallic interconnection 926 is formed on substrate 110 and is electrically coupled to gate electrode 921 .
- a first dielectric layer 960 having a thickness of about 0.2 um to 0.4 um is formed over gate electrodes 911 , 921 , and 931 , reset signal line 934 , row conductive line 140 , and metallic interconnections 916 , 926 , and 936 .
- First dielectric layer 960 includes a via hole 927 formed by selective etching, so as to expose a portion of metallic interconnection 926 at a distal end from gate electrode 921 .
- first dielectric layer 960 comprises a low-k dielectric material and may be planarized for further processing.
- a channel layer 904 is formed on first dielectric layer 960 above both gate electrodes 911 and 921 , and a channel layer 934 is formed on first dielectric layer 960 above gate electrode 931 .
- a single channel layer 904 is shared between gate electrodes 911 and 921 for both first and second TFTs 910 and 920 .
- two separate channel layers may be formed on first dielectric layer 960 respectively above and aligned with gate electrodes 911 and 921 .
- column conductive line 130 is formed on first dielectric layer 960 , linearly traversing a right hand portion of sensor pixel 120 , and is electrically coupled to a right side of channel layer 904 (or first TFT 910 ) through source/drain electrode 913 .
- Voltage source line 922 is formed on first dielectric layer 960 , linearly traversing a central portion of sensor pixel 120 , and is electrically coupled to a left side of channel layer 904 (or second TFT 920 ) through source/drain electrode 925 .
- Reset voltage line 932 is formed on first dielectric layer 960 , linearly traversing a left hand portion of sensor pixel 120 , and is electrically coupled to a left side of channel layer 934 (or third TFT 930 ) through source/drain electrode 935 .
- a metallic interconnection (or source/drain electrode) 933 is formed on first dielectric layer 960 filling via hole 927 , and is electrically coupled between a right side of channel layer 934 and gate electrode 921 through metallic interconnection 926 .
- channel layer 904 when channel layer 904 includes a single layer which comprises a semiconductor material of relatively low electrical mobility (e.g., a-Si having an electron mobility of about 0.5 ⁇ 1.0 cm 2 /(V ⁇ s) and IGZO having an electron mobility of about 1.0 ⁇ 20.0 cm 2 /V ⁇ s), a metallic interconnection 905 is formed on channel layer 904 and between gate electrodes 911 and 921 , so as to constitute source/drain electrodes 923 and 915 , and to form two distinctive channel regions respectfully for first and second TFTs 910 and 920 .
- a semiconductor material of relatively low electrical mobility e.g., a-Si having an electron mobility of about 0.5 ⁇ 1.0 cm 2 /(V ⁇ s) and IGZO having an electron mobility of about 1.0 ⁇ 20.0 cm 2 /V ⁇ s
- channel layer 904 when channel layer 904 includes a single layer which comprises a semiconductor material of relatively high electrical mobility (e.g., LTPS having an electric mobility of at least 100.0 cm 2 /V ⁇ s), metallic interconnection 905 is not necessary for first and second TFTs 910 and 920 .
- metallic interconnection 905 when channel layer 904 includes two separate and mutually insulating channel layers, a metallic interconnection 905 is formed on first dielectric layer 960 and over sides of the two separate channel layers, so as to constitute source/drain electrodes 923 and 915 .
- a second dielectric layer 970 is formed on source/drain electrodes 913 , 915 , 923 , 925 , 933 , and 935 , and over channel layers 904 and 934 .
- second dielectric layer 970 includes a via hole 942 formed by selective etching of second dielectric layer 970 and may be planarized for further processing.
- a sensor pixel electrode 122 is formed on second dielectric layer 970 filling via hole 942 , and is electrically coupled to third TFT 930 through source/drain electrode 933 .
- sensor pixel electrode 122 may have a surface area substantially equivalent to that of a collection of first, second, and third TFTs 910 , 920 , and 930 , so as to form a vertically stacked structure.
- second dielectric layer 970 has a thickness ranging between 0.3 um and 2.0 um or at least 0.3 um, so as to prevent or at least reduce undesirable interferences to the underlying TFTs 910 , 920 , and 930 due to, for example, a parasitic capacitance effect.
- FIG. 11 illustrates a perspective view of a laptop computer 1100 comprising a bidirectional display 1110 (including a display panel and an image sensor panel disposed on the display panel) in accordance with an embodiment of the present disclosure.
- Bidirectional display 1110 can be used to capture graphical information on an information bearing substrate (IBS) 1120 .
- IBS information bearing substrate
- a user can use one hand to hold IBS 1120 with the information bearing surface (i.e., the surface having, for example, texts or graphics attached thereto) facing a screen surface of bidirectional display 1110 .
- the user can use another hand to trigger a scan event by pressing a button 1130 (e.g., a key on the keyboard) of laptop computer 1100 .
- the scan event may be automatically triggered once IBS 1120 contacts and properly conforms to the screen surface of bidirectional display 1110 .
- the information attached to IBS 1120 can be optically captured by bidirectional display 1110 in response to the triggered scan event.
- laptop computer 1100 may additional include a mechanical switch at a side of the keyboard portion of laptop computer 1100 to turn on/off of the electrical power for the image sensor panel of bidirectional display 1110 , so as to reduce power consumption and enhance user privacy.
- the mechanical switch may be implemented as a soft/virtual button and/or a function key or a combination of function keys on the keyboard.
- FIG. 12 illustrates a perspective view of a smartphone device 1200 comprising a bidirectional display 1210 (including a display panel and an image sensor panel disposed on the display panel) in accordance with an embodiment of the present disclosure.
- Bidirectional display 1210 can be used to optically capture an image copy of an information bearing substrate 1220 .
- smartphone device 1200 includes bidirectional display 1210 , a mini camera 1202 proximate a top side of smartphone device 1200 , a start button 1240 proximate a bottom side of smartphone device 1200 , and a power/lock button 1260 at a side of smartphone device 1200 .
- Smartphone device 1200 may optionally include a protective cover flap 1205 and optionally include an earphone 1250 having a control button 1230 .
- protective cover flap 1205 may include an IBS holder 1206 , which can be sized to accommodate, for example, a standard business card or credit card, such that IBS 1220 can be held by protective cover flap 1205 and scanned when protective cover flap 1205 is flipped and closed onto bidirectional display 1210 .
- the user can trigger a scan event by pressing start button 1240 , pressing control button 1230 of earphone 1250 , pressing power/lock button 1260 , or a combination of the above.
- a scan event may be triggered immediately after IBS 1220 contacts and properly conforms to the screen surface of bidirectional display 1210 .
- smartphone device 1200 may include one or more magnetic switches (not shown) disposed at one or various positions underneath bidirectional display 1210 .
- a user may trigger a scan event by closing cover flap 1205 onto bidirectional display 1210 , and approaching and aligning one or more magnets to the magnetic switches.
- the magnets can be embedded in cover flap 1205 or applied externally after cover flap 1205 is covered on bidirectional display 1210 .
- IBS 1220 may have a substantially rectangular shape, but when placed on the display screen slightly rotated relative to the rectangular shape of bidirectional display 1210 . Accordingly, in one embodiment, smartphone device 1200 can first detect the boundary of IBS 1220 . Upon determination of the boundary of IBS 1220 , which may be slightly bigger than the actual area of IBS 1220 , the display panel of bidirectional display 1210 can emit a probing light only within the IBS boundary. In response to triggering of the scan event, information attached to IBS 820 can be carried by reflected light, captured by the image sensor panel of bidirectional display 1210 , and converted into a digital image.
- FIG. 13 illustrates a perspective view of a smartphone device 1300 comprising a bidirectional display 1310 (including a display panel and an image sensor panel disposed on the display panel).
- Bidirectional display 1310 can be used to detect a user's finger drawing 1320 , in accordance with an embodiment of the present disclosure.
- smartphone device 1300 similar to smartphone device 1200 of FIG. 12 , smartphone device 1300 includes bidirectional display 1310 and a start button 1340 proximate a bottom side of smartphone device 1320 .
- the image sensor panel of bidirectional display 1310 can passively detect the user's contacts/drawings using the image sensor panel.
- the display panel of bidirectional display 1310 can actively emit a constant intensity probing light during a time period that bidirectional display 1310 is switched to the drawing detection mode.
- an object such as a finger tip or stylus tip
- it can sequentially sense the locations and/or directions of the object forming drawing 1320 on bidirectional display 1310 , thereby detecting a shape or pattern of drawing 1320 .
- the image sensor panel of bidirectional display 1310 can be used in place of the existing capacitive touch sensitive panel.
- FIG. 14 illustrates a block diagram of an electronic device 1400 in accordance with an embodiment of the present disclosure.
- electronic device 1400 includes a bidirectional display 1410 , a memory 1420 , a processor 1430 , an input device 1440 , and a storage device 1450 , which are electrically coupled with each other through a system bus 1460 .
- Bidirectional display 1400 includes a display panel 400 or 500 , and an image sensor panel 100 disposed on display panel 400 or 500 , examples of which are illustrated in FIGS. 5A and 5B .
- bidirectional display 1410 includes a source control circuit 1404 , a gate control circuit 1406 , a column decode circuit 1402 , and a row decode circuit 1408 .
- Source control circuit 1404 and gate control circuit 1406 are electrically coupled to display panel 400 or 500 through source lines and gate lines, so as to control emission of the light emitting elements of display panel 400 or 500 .
- Column decode circuit 1402 and row decode circuit 1408 are electrically coupled to sensor pixels of image sensor panel 100 through column decode lines and row decode lines, so as to control light detection of the sensor pixels of image sensor panel 100 .
- source control circuit 1404 , gate control circuit 1406 , column decode circuit 1402 , and row decode circuit 1408 are respectively implemented in different integrated circuit (IC) chips. It is appreciated, however, that some or all of source control circuit 1404 , gate control circuit 1406 , column decode circuit 1402 , and row decode circuit 1408 may be integrated in a single IC chip. Further, source control circuit 1404 and gate control circuit 1406 may be implemented as one IC chip, while column decode circuit 1402 and row decode circuit 1408 may be implemented as another IC chip.
- a computer program product may be stored in storage device 1450 (e.g., hard drive, non-volatile solid state memory drive, and the like) and loaded to memory 1420 (e.g., random access memory (RAM) or other volatile memory) of electronic device 1400 for execution by processor 1430 .
- memory 1420 e.g., random access memory (RAM) or other volatile memory
- all or part of the computer program product may be included as add-on modules in an operating system (e.g., Linux, Android, iOS, etc.) for the electronic device 1400 .
- the computer program product may be a standalone computer software application (e.g., a mobile app or a software application package) executable on electronic device 1400 using resources of the operating system.
- the computer program product includes a probing module 1421 , a light detection module 1422 , and an image assembly module 1425 .
- the computer program product additionally includes one or more of a boundary determination module 1423 , a conformity determination module 1424 , and an optical character recognition (OCR) module 1426 .
- the computer program product can further include an interpreter module 1428 , such as a scripting language software program configured to interpret lines of codes written in a specific scripting language and to instruct hardware of electronic device 1400 to perform the functions as provided in the lines of codes.
- Probing module 1421 comprises computer instructions to control gate control circuit 1406 and source control circuit 1404 , such that probing signals can be transmitted to the light emitting elements of display panel 400 or 500 , in response to a scan event, thereby emitting a predetermined probing light.
- Light detection module 1422 comprises computer instructions to control column decode circuit 1402 and row decode circuit 1408 , such that light (e.g., reflected light from the IBS) entering the sensor pixels of image sensor panel 100 can be detected in response to a scan event.
- the detected raw image data may be transmitted to image assembly module 1425 for further processing.
- Image assembly module 1425 comprises computer instructions to analyze the raw image data detected by light detection module 1422 , and assemble or generate a digital image data file from the raw image data.
- the digital image data file can be a pixel-based image data file of a lossy/lossless compressed format (e.g., JPG, PNG, TIFF, etc.) or a pixel-based image data file of an uncompressed format (e.g., BMP).
- image assembly module 1425 saves the generated digital image data file into storage device 1450 . The digital image data file is then ready for user access or further processing.
- the generated digital image data file is transmitted to or loaded by OCR module 1426 for further processing.
- OCR module 1426 analyzes the digital image data file and extracts textual information from the image data file.
- the extracted textual information can be saved into storage device 1450 as a text data file (e.g., TXT, DOC, etc.).
- the extracted textual information can be saved together with non-textual image data as a combined image/text data file (e.g., PDF).
- Boundary determination module 1423 comprises computer instructions to determine the boundary of an IBS placed on an image sensor panel 100 of the present disclosure. In one embodiment, upon triggering of a scan event, boundary determination module 1423 transmits an instruction set to detection module 1422 to passively monitor an IBS. Upon placing an IBS over a screen surface of image sensor panel 100 , the boundary determination module 1422 captures a temporary image for the entire screen of image sensor panel 100 . Because detection module 1422 passively monitors an IBS (i.e., without emitting a probing light), a relatively darker region in the temporary image may correspond to the IBS region, while a relatively brighter region in the temporary image may correspond to the non-IBS region.
- detection module 1422 can monitor an IBS with a white probing light being constantly emitted. In such cases, a relatively brighter region in the temporary image may correspond to the IBS region, while a relatively darker region in the temporary image may correspond to the non-IBS region.
- boundary determination module 1423 analyzes the temporary image and determines a boundary of the IBS in accordance with a brightness change in the temporary image. In one embodiment, prior to analyzing the temporary image, boundary determination module 1423 can adjust the temporary image by, for example, increasing contrast of the temporary image. In one embodiment, boundary determination module 1423 generates a boundary data file (comprising data points of the boundary locations) and save the boundary data file in storage device 1450 .
- the IBS may be a user's foot, and by placing the user's foot on image sensor panel 100 of the present disclosure, boundary determination module 1423 can acquire boundary data of the user's foot. The boundary data can then be further analyzed and converted to a shoe size of the user, thereby determining inventory availability of footwear for the user.
- Conformity determination module 1424 comprises computer instructions to determine whether an IBS has been properly placed on a screen surface of image sensor panel 100 .
- conformity determination module 1240 monitors the sensor pixels of image sensor panel 100 and waits for an IBS. Once the sensor pixels detect that an IBS is placed on image sensor panel 100 , a temporary image may be captured and transmitted to conformity determination module 1424 . Conformity determination module 1424 then analyzes the temporary image and determines whether the temporary image is substantially focused. Because no converging or diverging lens is included in bidirectional display panel 1410 of the present disclosure, the temporary image can be focused or not blurred only when the IBS contacts or is disposed very close to an upper surface of image sensor panel 100 . If the temporary image is substantially focused or not blurred, conformity determination module 1424 then determines that the IBS is properly placed on image sensor panel 100 and ready for the scan event.
- FIG. 15 illustrates a flow diagram for capturing graphical information from an information bearing substrate in accordance with an embodiment of the present disclosure.
- the method of the present disclosure can capture graphical information on a monochromic (black/white or grey scale) information bearing substrate or a colored information bearing substrate.
- Step 1501 an information bearing substrate (IBS) is placed in contact or in close proximity to a screen surface of a bidirectional display with an information-bearing surface facing the bidirectional display.
- Step 1503 in response to a triggered scan event, a probing light of a single color is emitted from the bidirectional display panel to the IBS.
- Step 1505 reflected light from the IBS is detected by an array of light detecting elements of the bidirectional display panel as raw image data.
- Step 1507 a digital image data file of a predetermined format is constructed from the raw image data.
- the digital image data file is stored in a computer memory for further processing.
- Steps 1503 and 1505 can be repeated several times for capturing information on a colored IBS. For example, by sequentially (i) emitting red probing light and detecting reflected red light, (ii) emitting green probing light and detecting reflected green light, and (iii) emitting blue probing light and detecting reflected blue light, the bidirectional display of the present disclosure can generate colored raw image data for constructing a colored digital image data file.
- FIGS. 16A and 16B illustrate a bidirectional display 1600 configured as a 3 D image sensor, in accordance with certain embodiments of the present disclosure.
- image sensor panel 1610 of bidirectional display 1600 may be divided into sub-regions using a software program product to capture images of an object from different angles.
- bidirectional display 1600 may be a curved display having a concave active surface, such that different sub-regions of image sensor panel 1610 can take images of an object at different angles. Such images taken from different angles of the same object may be used to reconstruct a 3 D image of the object.
- bidirectional display 1600 may be a flat panel display having a flat display surface.
- the image sensor panel of display device 1600 may additional include a micro lens array having a plurality of microlenses, each microlens being formed on an image sensor pixel, and the microlenses together forming an effective optical lens (e.g., a Fresnel lens) for certain desired optical functionality (e.g., focus, field of view, etc.) for the entire image sensor panel or sub-regions thereof.
- an effective optical lens e.g., a Fresnel lens
- image sensor panel 1610 can be divided into two sub-regions, i.e., a left input region 1610 L (effectively a first camera) and a right input region 1610 R (effectively a second camera).
- Left and right input regions 1610 L and 1610 R may be a rectangular area having equal widths and lengths.
- left and right input regions 1610 L and 1610 R may have an area that is a fraction of the total display area.
- left and right input regions 1610 L and 1610 R may have the same aspect ratio as that of bidirectional display 1600 , such that images taken by regions 1610 L and 1610 R can be displayed directly on display device 1600 without horizontal or vertical scaling/distortion.
- image sensor panel 1610 can be divided into four sub-regions, i.e., an upper-left input region 1610 UL (effectively, a first camera), a lower-left input region 1610 LL (effectively, a second camera), an upper-right input region 1610 UR (effectively, a third camera), and a lower-right input region 1610 LR (effectively, a fourth camera). Similar to input regions 1610 L and 1610 R shown in FIG. 16A , input regions 1610 UL, 1610 LL, 1610 UR, and 1610 LR may be a rectangular area having equal widths and lengths (i.e., equal area).
- input regions 1610 UL, 1610 LL, 1610 UR, 1610 LR may have an area that is a fraction of the total display area of bidirectional display 1600 .
- input regions 1610 UL, 1610 LL, 1610 UR, and 1610 LR may have the same aspect ratio as that of bidirectional display 1600 , such that images taken by input regions 1610 UL, 1610 LL, 1610 UR, and 1610 LR can be displayed directly on display device 1600 without horizontal or vertical scaling/distortion.
- the bidirectional display of the present disclosure can be used in various contexts. Below are several of such exemplary usage cases. It should be appreciated that the bidirectional display of the present disclosure can be used in various other contexts without departing from the spirit and scope of the present disclosure.
- a consumer's credit card is an IBS.
- the required credit card information includes one or more of the credit card number (e.g., 16 digits), the expiration month/year, and the account holder's first and last names appearing on one side of the credit card, and the security code (3 or 4 digits) appearing on the other side of the credit card.
- an electronic commerce website or mobile app can employ a graphic user interface on the display panel to capture credit card information directly from the front and back surfaces of the consumer's credit card. As such, the consumer does not need to manually enter the credit card information at the conclusion of the online purchase.
- the bidirectional display of the present disclosure can eliminate the need of a magnetic stripe reader for credit card transactions.
- the graphic user interface on a bidirectional display includes a first rectangular area, which may have a physical area comparable to or slightly greater than the surface dimension of a standard credit card.
- the graphic user interface can then instruct the consumer to place his/her credit card on the bidirectional display and within the boundary of the first rectangular area, with the front or back surfaces of the credit card facing the bidirectional display.
- a scan event can then be triggered such that the electronic commerce website or mobile app can capture an image of the front or back surfaces of the credit card.
- the captured image may be analyzed using an OCR module to acquire textual credit card information from the captured image.
- the textual credit card information may include credit card number, account holder name, expiration month/year, security code, etc. Thereafter, monetary transaction for the online purchase can be completed using the acquired credit card information.
- the captured information can additional include an image of the consumer's hand-written signature or an image of the laser sticker on a side of the credit card, thereby enhancing the transaction security in electronic commerce.
- a consumer's foot is an IBS.
- Online purchase of attires and fashion accessories has become common practice for consumers with Internet access.
- footwear especially children shoes
- the shoe size numbering systems are inconsistent among different shoe makers/vendors, especially when they are based in different countries. That is, the same shoe size number of two shoe makers/vendors may correspond to two totally different actual physical sizes. Accordingly, a consumer often orders footwear of a wrong size and have to spend extra time and effort to return/exchange for a correct size.
- an electronic commerce website or mobile app can employ a graphic user interface on the bidirectional display and acquire foot size information through the graphic user interface.
- the graphic user interface prompts the consumer to place a bare foot (such as a baby foot) on a bidirectional display.
- the consumer can first draw a foot print on a piece of paper by tracing an actual foot thereon, and then place the foot print paper on the bidirectional display for shoe size determination.
- a scan event can then be triggered such that foot print information can be captured directly from the bidirectional display.
- the electronic commerce website or mobile app can analyze the foot print information and determine a foot size, thereby determining a correct shoe size number for the desired footwear.
- the foot size determination may not be completely accurate, with the assistance of the bidirectional display of the present disclosure, the probability of ordering wrong sized footwear can be largely reduced.
- the soft and flexible finger tip When a user's finger tip contacts or touches a screen surface of a bidirectional display, the soft and flexible finger tip become flattened and shows a circular/elliptical shape (or a touch shape) on the display screen.
- the photosensitive pixel array can “see” the touch shape and trigger a TOUCH_DOWN event in the electronic device of the present disclosure.
- the finger leaves the screen surface of the bidirectional display, it triggers a TOUCH_UP event in the electronic device of the present disclosure.
- one sequence of TOUCH_DOWN and TOUCH_UP events within a pre-determined time period constitutes a SINGLE_CLICK event.
- two sequential TOUCH_DOWN and TOUCH_UP events within a pre-determined time period constitutes a DOUBLE_CLICK event.
- the finger touches the screen surface of the bidirectional display and traverses on the screen surface it triggers a DRAWING event, and the electronic device can then detect the drawing shape as an input.
- a smartphone device having a bidirectional display can be used to detect a user's fingerprint and/or other biometrics.
- a portion (e.g., a square/rectangular area) of the bidirectional display can be used to optically detect a fingerprint, while another portion/area of the bidirectional display can show the detected result in real time.
- the detected fingerprint can be compared with an existing finger print data stored in an electronic device to control access of the electronic device.
- a smartphone device having a bidirectional display can be used to detect pulse rate or heard beat of a human being.
- a user can place and press a finger (e.g., index finger or thumb) on the bidirectional display of a smartphone device.
- the display panel can emit a light source of, for example, red color, to the finger and the image sensor panel can measure the light diffused in and reflected from the finger.
- the smartphone device can then analyze the temporal behavior of the reflected light detected by the image sensor panel to determine the heartbeat or pulse rate of the user.
- a smartphone device having a bidirectional display of the present disclosure can also be used to capture a fingerprint. It has been reported that existing fingerprint scanners can be tampered easily by using an image copy of the user's finger. As such, simultaneous measurement of both fingerprint and pulse rate can ensure that the fingerprint is captured from an actual and living person. Accordingly, the bidirectional display of the preset disclosure can achieve enhanced security to prevent unauthorized access of the smartphone device or other transactions.
- a display screen of a smartphone device can include an image sensor panel of the present disclosure.
- the image sensor panel can include dual-band sensor pixels that are sensitive to both infrared and visible light. Because only a small number of infrared sensitive pixels are required to take temperature measurement, it is appreciated that not all of the sensor pixels on the image sensor panel need to be sensitive to infrared light.
- a user can simply place a display screen of a smartphone device in contact with the user's body surface (e.g., forehead) to measure black body radiation of the user's body, thereby determining the body temperature of the user.
- an IBS can be a document, a sheet of paper, a business card, and the like, on which encoded markings, such as a QR-code, a bar code (1D or 2D), and the like, are printed or otherwise attached thereon.
- the encoded markings can be decoded using a pre-determined algorithm.
- a smartphone screen can also serve as an IBS, and the encoded markings can be displayed on the smartphone screen.
- the encoded markings can include address information of a desired destination (e.g., longitude, latitude, and/or sea level, or street address), computer instructions in textual form (e.g., computer codes written in a scripting language), media data in binary form (e.g., video data, audio data, image data, etc.), and the like.
- a desired destination e.g., longitude, latitude, and/or sea level, or street address
- computer instructions in textual form e.g., computer codes written in a scripting language
- media data in binary form e.g., video data, audio data, image data, etc.
- Any data included in the encoded markings on an IBS can be read by placing the IBS on an image sensor panel of the present disclosure. It is appreciated that, although focus is required, a rear or front camera of a smartphone device can also be used to read the IBS described herein.
- a vehicle navigation system can include an image sensor panel on its display screen and the encoded markings of an IBS can include destination information (e.g., street address, or latitude and longitude).
- destination information e.g., street address, or latitude and longitude.
- a user can place the IBS proximate to or in contact with the screen surface of the vehicle navigation system.
- the vehicle navigation system then reads the destination information from the IBS and, in response, automatically finds and shows the destination on its display screen within only a few seconds.
- the user can click a confirm/start button on the navigation system, thereby beginning navigation to the destination.
- a smartphone device can include an image sensor panel on its display screen and the encoded markings of an IBS can include computer instructions written in a scripting language. It is appreciated that the IBS having encoded markings can also be read using the rear or front camera of a smartphone device.
- an IBS can include encoded markings of computer instructions to be used in an emergency situation, such as, a car accident.
- Such computer instructions can be, for example:
- the output (e.g., success or fail) is saved in variable Msg1.
- Msg2 Text (Insurance, “$Username$, whose policy number is $PolicyNo$ had a car accident at location $Loc$ on $Time$”); // Send text message to insurance company and provide information on the user's name, insurance policy number, and accident location and time.
- the output (e.g., success or fail) is saved in variable Msg2.
- the above computer instructions trigger an interpreter module 1428 (see, for example, FIG. 14 ) executed on the smartphone device to run the computer instructions.
- the computer instructions define four variables representing the user's name (i.e., “John Doe”); the user's vehicle insurance policy number (i.e., “001122334455”); the insurance company's contact number (i.e., “+1-617-987-6543”); and the emergency help line number (“911”).
- the interpreter module 1428 also obtains the current date and time by calling function “GetCurrentTime( )” and obtains the smartphone device's phone number by calling function “GetPhoneNumber( )”.
- the outputs of the functions are respectively stored in variables Time (e.g., “Jan. 1, 2015, 11:59:59 AM”) and Contact (e.g., “+1-617-987-6543”).
- the interpreter module 1428 instructs the smartphone to call “911” recorded in variable “Police”. After being connected with “911”, the interpreter module 1428 instructs the smartphone to audibly read out a sentence of, for example, “John Doe had a car accident at location [+42.12071232, ⁇ 71.17251217], on Jan. 1, 2015, 11:59:59 AM and his/her contact number is +1-617-987-6543, please help.” If the above sentence is completely read to an officer, an output of SUCCESS will return from the function call and is written to the variable Msg1. Otherwise, an output of FAIL will return and write to variable Msg1.
- the interpreter module 1428 can additionally or alternatively send a text message to the user's insurance company by calling a “Text( )” function.
- the interpreter module 1428 sends to the insurance company a text message string of, for example, “John Doe, whose policy number is 001122334455, had a car accident at location [+42.12071232, ⁇ 71.17251217], on Jan. 1, 2015, 11:59:59 AM.” If the above text message string is sent to the insurance company, an output of SUCCESS will return from the function call and is written to the variable Msg2.
- the bidirectional display device of the present disclosure can be used as a touchless user interface.
- a person playing a video game may stand or sit in front of a bidirectional display device of the present disclosure.
- the gaming software can configure image sensor panel 1610 into two input regions 1610 L and 1610 R.
- input regions 1610 L and 1610 R can capture the player's gesture and determine the spatial coordinates of, for example, the player's body or hands. Such spatial coordinates can then be used to interact with different game characters or themes in the video game.
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Abstract
Description
- This application claims the benefit of priority to U.S. Provisional Application No. 61/955,223, filed Mar. 19, 2014, and U.S. Provisional Application No. 62/025,772, filed Jul. 17, 2014, the entire contents of both of which are incorporated herein by reference for all purposes.
- The present disclosure relates to an image sensor panel and a method for capturing graphical information using the image sensor panel. More particularly, the present disclosure relates to an image sensor panel including an array of photosensitive pixels, and a method for capturing graphical information from a two-dimensional information bearing substrate (IBS) using the image sensor panel.
- Flat panel displays have been used ubiquitously as a standard output device for various electronic devices, such as, personal computers, laptop computers, smartphones, smart watches, televisions, handheld video game devices, a public information display, and the like. Recently, flat panel displays have been developed to include input functionalities (e.g., touch screens that are sensitive to either pressure or capacitance changes in response to user touches or interactions), such that the flat panel displays can be used as both an input (pointer) device and an output device. A touch screen can interact with the user and detect one or more of user's finger point contacts and/or drawings on the screen as input signals. However, a touch screen cannot capture graphical information from the two-dimensional surface of an information bearing substrate.
- Many electronic devices, such as smartphones and laptop computers, have been developed to include a camera disposed before or behind their flat panel displays pointing to a direction same or opposite to the light emission direction of the displays. Although such a camera can be used to capture images (still or moving pictures) as an input, the camera requires focus and the captured images are often distorted or of low quality due to, for example, a shaky hand.
- Accordingly, there is a need to develop a new image sensor panel that can be easily integrated with a display panel (flat or curved) and can easily capture graphical information from the two-dimensional surface of an information bearing substrate without having to focus. There is also a need to develop a new method for capturing graphical, textual, or other information from the information bearing substrate using the combination of an image sensor panel and a display panel.
- In one aspect, the present disclosure provides an image sensor panel, comprising a substrate; and a sensor array on the substrate, the sensor array including a plurality of photosensitive pixels. The substrate comprises a first region defined by the sensor array and a second region other than the first region. The second region is optically transparent and has an area greater than that of the first region. In one embodiment, the substrate comprises one of glass, plastic, and a combination thereof.
- In one embodiment, the image sensor panel further comprises a plurality of column conductive lines and a plurality of row conductive lines intersecting the column conductive lines. The photosensitive pixels are formed proximate intersections of the column and row conductive lines. In one embodiment, the column and row conductive lines comprise an electrically conductive material that is optically transparent.
- In one embodiment, each of the photosensitive pixels has a stacked structure comprising a control component and a photosensitive component. In one embodiment, the control component is formed on the substrate and the photosensitive component is formed on the control component. In one embodiment, the photosensitive component is formed on the substrate and the control component is formed on the photosensitive component. In one embodiment, the control component comprises three thin film transistors.
- In one embodiment, the stacked structure further comprises a dielectric layer between the control component and the photosensitive component, the dielectric layer having a via hole, and wherein the control component is electrically coupled to the photosensitive component through the via hole. In one embodiment, the dielectric layer has a thickness between 0.3 to 2.0 microns or at least 0.3 microns.
- In one aspect, the present disclosure provides a two-dimensional image scanner comprising a surface light source having a light-emitting surface, and the image sensor panel as summarized above, the image sensor panel being disposed on the light emitting surface of the surface light source. In one embodiment, the image scanner further comprises a light block component formed on the substrate within the first region and between the light emitting surface of the surface light source and the photosensitive pixels of the sensor array.
- In one aspect, the present disclosure provides a bidirectional display device, comprising a display module comprising a plurality of display pixels separated by a black matrix, wherein the display pixels emit light from a first surface of the display module; and the image sensor panel as summarized above, the image sensor panel being attached to the first surface of display module. In one embodiment, the photosensitive pixels of the image sensor panel are aligned with the black matrix. In one embodiment, the display pixels of the display module are aligned with the second region of the substrate. In one embodiment, the image sensor panel further comprises a light block component formed on the substrate of the image sensor panel within the first region and between the display module and the photosensitive pixels of the sensor array.
- In one aspect, the present disclosure provides a bidirectional display device, comprising: a display module comprising a plurality of display pixels configured to emit light from a first surface of the display module; and an image sensor panel comprising a substrate and a plurality of photosensitive pixels on the substrate, the substrate comprising a first region defined by the photosensitive pixels and a second region other than the first region, the second region being optically transparent and having an area greater than that of the first region; wherein the image sensor panel is attached to the first surface of the display module.
- In one embodiment, the display module comprises a liquid crystal display (LCD) module, and the display pixels are separated by a black matrix of the liquid crystal display module; and wherein the photosensitive pixels of the image sensor panel are aligned to the black matrix of the display module. In one embodiment, the image sensor panel further comprises a light block component formed on the substrate of the image sensor panel within the first region and between the display module and the photosensitive pixels of the sensor array.
- In one embodiment, the display module comprises an organic light emitting diode (OLED) display and the display pixels of the display module are aligned with the second region of the substrate. In one embodiment, the image sensor panel further comprises a light block component formed on the substrate of the image sensor panel within the first region and between the display module and the photosensitive pixels of the sensor array. In one embodiment, the display pixels are configured to have a display resolution and the photosensitive pixels are configured to have a sensor resolution, and wherein the sensor resolution is at least 1.5 times of the display resolution.
- In one aspect, the present disclosure provides a method for capturing graphical information from an information bearing substrate, the method comprising: contacting an information bearing substrate with a surface of an image sensor panel, the image sensor panel comprising an array of photosensitive pixels and an optically transparent region between the photosensitive pixels; emitting probing light from a light source to the information bearing substrate through the optically transparent region of the image sensor panel; detecting reflected light from the information bearing substrate using the photosensitive pixels to obtain raw image data; generating a digital image data file from the raw image data; and storing the digital image data file in a computer storage medium.
- In one embodiment, the method further comprises, after contacting the information bearing substrate with the surface of the image sensor panel, determining a boundary of the information bearing substrate.
- In one embodiment, emitting the probing light comprises emitting the probing light from a portion of the light source that corresponds to a surface area defined by the boundary of the information bearing substrate.
- In one embodiment, the method further comprises determining conformity of the information bearing substrate placed on the image sensor panel.
- In one embodiment, the method further comprises: loading the digital image data file from the computer storage medium; and extracting textual information from the digital image data file by performing an optical character recognition process.
- In one embodiment, the method further comprises: generating a composite data file including image data and the extracted textual information; and storing the composite data file in the computer storage medium.
- In one embodiment, the method further comprises: generating a text data file including the extracted textual information; and storing the text data file in the computer storage medium.
- In one embodiment, emitting the probing light comprises emitting the probing light having an intensity-time profile of a Gaussian type with a half-width of less than 1.0 second.
- In one embodiment, emitting the probing light comprises sequentially emitting first color probing light, second color probing light, and third color probing light to the information bearing substrate.
- In one embodiment, detecting the reflected light comprises sequentially detecting first color reflected light, second color reflected light, and third color reflected light from the information bearing substrate.
- In one aspect, the present disclosure provides a computer program product stored in a computer memory, the computer program product when executed by a processor causing the processor to perform the method for capturing graphical information as summarized above.
- In one aspect, the present disclosure provides an image sensor panel, comprising a transparent substrate having a first region and a second region, and an array of photosensitive pixels disposed on the transparent substrate within the first region, the photosensitive pixels being separated from each other by the second region. The second region has an area greater than that of the first region.
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FIG. 1 illustrates a sectional view of an input device including an image sensor panel, in accordance with an embodiment of the present disclosure. -
FIG. 2 illustrates a plane view of an image sensor panel, in accordance with an embodiment of the present disclosure. -
FIG. 3 illustrates a sectional view of a sensor pixel of the image sensor panel as illustrated inFIG. 2 . -
FIGS. 4A through 4D illustrate a layered structure of a sensor pixel, read by a single thin film transistor (TFT), in accordance with an embodiment of the present disclosure. -
FIG. 5A illustrates a sectional view of an image sensor panel in combination with a liquid crystal display (LCD) module, in accordance with embodiments of the present disclosure. -
FIG. 5B illustrates a sectional view of an image sensor panel in combination with an organic light emitting diode (OLED) display module, in accordance with embodiments of the present disclosure -
FIG. 6 illustrates a plane view of a sensor pixel array aligned with a black matrix of a display module, in accordance with an embodiment of the present disclosure. -
FIG. 7 illustrates a plane view of a sensor pixel array slightly misaligned with a black matrix of a display module, in accordance with an embodiment of the present disclosure. -
FIG. 8 illustrates a plane view of a sensor pixel array aligned with a black matrix of a display module, in accordance with an embodiment of the present disclosure. -
FIG. 9 illustrates a schematic circuit diagram of a sensor pixel, read by three thin film transistors (TFTs), in accordance with an embodiment of the present disclosure. -
FIGS. 10A through 10D illustrate a layered structure of the sensor pixel as illustrated inFIG. 9 . -
FIG. 11 illustrates a perspective view of a laptop computer comprising an image sensor panel in combination with a display module, when scanning image of an information bearing substrate, in accordance with an embodiment of the present disclosure. -
FIG. 12 illustrates a perspective view of a smartphone device comprising an image sensor panel in combination with a display module, when scanning image of an information bearing substrate, in accordance with an embodiment of the present disclosure. -
FIG. 13 illustrates a perspective view of a smartphone device comprising an image sensor panel in combination with a display module, when detecting a user's finger drawing, in accordance with an embodiment of the present disclosure. -
FIG. 14 illustrates a block diagram of an electronic device in accordance with an embodiment of the present disclosure. -
FIG. 15 illustrates a flow diagram for capturing graphical information from an information bearing substrate in accordance with an embodiment of the present disclosure. -
FIGS. 16A and 16B illustrate a bidirectional display device configured as a 3D image sensor, in accordance with certain embodiments of the present disclosure. - The term “information bearing substrate” (or IBS) is used herein to refer to any tangible medium having a 2D surface that bears textual, graphical, or other information printed or otherwise attached thereto. In various embodiments, the information bearing substrate can be a document, a photograph, a drawing, a business card, a credit card, a smartphone display screen, a surface of a merchandize package box, a book cover/page, a finger/palm/foot surface, and the like. Unless otherwise provided, the term “image sensor panel” is used herein to refer to an image sensor panel device that includes a plurality of photosensitive pixels (or sensor pixels) formed on a glass/plastic substrate, as shown and described herein. Further, unless otherwise provided, the term “bidirectional display” is used herein to refer to a panel device that includes both a display panel and an image sensor panel, as shown and described herein. In different cases, a bidirectional display may be flat, flexible, or curved.
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FIG. 1 illustrates a sectional view of aninput device 1 including animage sensor panel 100, in accordance with an embodiment of the present disclosure. Referring toFIG. 1 ,input device 1 includes image sensor panel (ISP) 100 and abacklight module 200, both being enclosed in ahousing 300 with a surface ofISP 100 being optically exposed to the exterior environment.Backlight module 200 comprises a light guide plate (having a square shape, a rectangular shape, or other suitable shapes) with a plurality oflight reflectors 205 formed at a bottom surface of the light guide plate, and at least onelight source 250, which can be one or more point light sources (e.g., LEDs) at one or more corners of the light guide plate or a linear light source (e.g., a cold cathode fluorescent lamp or CCFL) at a side of the light guide plate. -
Backlight module 200 emits a uniform planar light source along afirst direction 20 from a top surface of the light guide plate by guiding light 210 fromlight source 250 and reflecting light 210 usingreflectors 205. In one embodiment,backlight module 200 includes a singlepoint light source 250, which emitslight 250 of a white color. In another embodiment,backlight module 200 includes four pointlight sources 250 disposed proximate the four corners of a square/rectangular light guide plate, thelight sources 250 respectfully emitting light of, for example, red, green, blue, and white (or infrared) colors. - In one embodiment,
ISP 100 includes transparent areas such that the uniform planar light source generated frombacklight module 200 can penetrate therethrough and hit adocument 10 placed on the top surface of the light guide plate. The planar light source is then reflected fromdocument 10 along asecond direction 30. The reflected light optically carries information attached to document 10. Such information carried by the reflected light can be detected by photosensitive pixels formed on theISP 100, as further detailed below. -
FIG. 2 illustrates a plane view of an image sensor panel (ISP) 100, in accordance with an embodiment of the present disclosure.ISP 100 includes atransparent substrate 110, an array ofsensor pixels 120, and a plurality of column conductive lines (columns) 130 and row conductive lines (rows) 140 electrically coupled with thesensor pixels 120.Sensor pixels 120 may be formed proximate intersections ofcolumns 130 androws 140. In certain embodiments,sensor pixels 120 can be arranged on a first region ofsubstrate 110 to form a square lattice structure, a rectangular lattice structure, a triangular lattice structure, a hexagonal lattice structure, and the like. Each ofsensor pixels 120 can be configured to have, for example, a circular shape, an oval shape, a square shape, a rectangular shape having rounded corners, or any other suitable shapes. In one embodiment, the first region ofsubstrate 110 is rendered optically opaque due to the presence ofsensor pixels 120. In one embodiment,ISP 100 is devoid of light emitting elements and optically transparent at non-sensor pixel regions (i.e., other than the first region). - In the embodiment of a square lattice structure, each sensor pixel may have a sensor pixel size S (e.g., a width or diameter, depending on the pixel shape, of about 10-40 um) and two neighboring sensor pixels may be separated by a pixel separation distance P. Pixel separation distance P may be about 1.5 to 5 times of pixel size S. For example, pixel size S may be 20 um, while pixel separation may be 30 um (P=1.5 S), 40 um (P=2 S), or 50 um (P=2.5 S). The
sensor pixels 120 are separated so as to leave transparent regions 150 (i.e., the non-sensor pixel regions) to allow at least a portion of the surface light source frombacklight module 200 to penetrate therethrough. -
FIG. 3 illustrates a sectional view of asensor pixel 120 of theimage sensor panel 100 as illustrated inFIG. 2 . Referring toFIG. 3 ,sensor pixel 120 may be formed on aTFT backplane 121 and include abottom electrode 122 onTFT backplane 121, aninterlayer 123 onbottom electrode 122, aphotosensitive layer 124 oninterlayer 123, atop electrode 125 onphotosensitive layer 124, and aprotective layer 126 ontop electrode 125.Photosensitive layer 124 may comprise semiconductor materials, e.g., amorphous silicon (a-Si), low temperature polysilicon (LTPS), metal oxide (ZnO, IGZO, etc.), and the like, which form a PIN structure. Alternatively,photosensitive layer 124 may comprise organic photon sensitive materials.Interlayer 123 is optional and may comprise PEDOT:PSS.Protective layer 126 is optional and may comprise a transparent laminating material or alternatively a non-transparent (opaque) resin material so as to form a light block. - Referring to
FIGS. 1 through 3 , in one embodiment, a light source (e.g., a surface light source from backlight module 200) can emit along afirst direction 20 to an information bearing substrate (IBS) 10 bypassingsensor pixels 120 and throughnon-sensor pixel regions 150. The light source is then reflected fromIBS 10, carrying information fromIBS 10 and entering intosensor pixels 120 along asecond direction 30. In one embodiment, darker markings onIBS 10 reflect less light (lower intensity), while brighter markings onIBS 10 reflect more light (higher intensity). In response to the reflected light,photosensitive layer 124 detects the information carried by the reflected light (e.g., intensity of the reflected light) and generates electrons, thereby forming a photo current that flows vertically and is detected or read throughcolumn 130 androw 140. In this embodiment,top electrode 125 and/orprotective layer 126 may comprise an optically non-transparent material, thereby acting as a light block, whileTFT layer 121 andbottom electrode 122 may comprise optically transparent materials. - It is appreciated that, in an alternative embodiment,
first direction 20 of light source andsecond direction 30 of reflected light may be opposite to those illustrated inFIG. 3 . As such, in the alternative embodiment,top electrode 125 andprotective layer 126 may comprise optically transparent materials, whilebottom electrode 122 and/orTFT layer 121 may comprise an optically non-transparent (or opaque) material, thereby acting as a light block. -
FIGS. 4A through 4D illustrate a layered structure of asensor pixel 120, read by a single thin film transistor (TFT) 121, in accordance with an embodiment of the present disclosure.FIG. 4A illustrates the layered structure of a TFT backplane, before formation of aphotosensitive layer 124.FIG. 4B illustrates a section view of the layered structure taken from line B-B ofFIG. 4A .FIG. 4C illustrates the layered structure, after formation ofphotosensitive layer 124 on the TFT backplane.FIG. 4D illustrates a section view of the layered structure taken from line D-D ofFIG. 4D . - Referring to
FIGS. 4A and 4B ,sensor pixel 120 is formed on a transparent substrate 110 (made of, for example, glass or plastic). Agate electrode 121G is formed onsubstrate 110, and a first transparent dielectric layer 112 (made of, for example, SiO2) is formed ongate electrode 121 G covering substrate 110. Achannel layer 121C is formed and patterned ondielectric layer 112 and at a position that is aligned withgate electrode 121G.Channel layer 121C comprises a semiconductor material of, e.g., amorphous silicon (s-Si), low temperature polysilicon (LTPS), metal oxide (ZnO, IGZO, etc.), and the like. Source/drain electrodes 121SD and 121DS are formed ondielectric layer 112. Source/drain electrodes 121SD and 121DS are separated bychannel layer 121C, and electrically coupled to two opposing sides ofchannel layer 121C. A secondtransparent dielectric layer 114 is formed onchannel layer 121C and source/drain electrodes 121SD and 121DS.Gate electrode 121G,channel layer 121C, source/drain electrodes 121SD and 121DS constituteTFT 121. - A
sensor pixel electrode 122 is formed on secondtransparent dielectric layer 114 and is electrically coupled to source/drain electrode 121SD through a viahole 122V formed indielectric layer 114. In this embodiment,gate electrode 121G is electrically coupled torow line 140, while source/drain electrode 121DS is electrically coupled tocolumn line 130. In one embodiment, viahole 122V may be formed by selectively etchingdielectric layer 114 to expose a portion of source/drain electrode 121SD prior to the formation ofsensor pixel electrode 122.Sensor pixel electrode 122 may be formed by depositing a metallic material ondielectric layer 114, filling viahole 122V, and subsequently patterned into, for example, a square shape having round corners, as shown inFIG. 4A . Prior to deposition of the metallic material, a thirdtransparent dielectric layer 116 may be formed and etched to define a shape of thepixel electrode 122. Upon deposition of the metallic material,dielectric layer 116 andsensor pixel electrode 122 may be planarized for further processing. Referring toFIGS. 4C and 4D , aphotosensitive layer 124 is formed onpixel electrode 122, and acommon electrode 125 is formed onphotosensitive layer 124.Common electrode 125 may be coupled to a common ground (i.e., 0 Volt). In one embodiment,photosensitive layer 124 may include a first semiconductor layer (having either n- or p-type conductivity) deposited onpixel electrode 122, an intrinsic semiconductor layer deposited on the first semiconductor layer, and a second semiconductor layer (having a conductivity type opposite to that of the first semiconductor layer) deposited on the intrinsic semiconductor layer. The three layers form a photodiode having a PIN structure. As such, in response to impinging light, the PIN structure can generate photocurrent that flows vertically. It is appreciated that the intrinsic semiconductor layer may not be necessary in certain applications. In this embodiment, thephotosensitive layer 124 is etched and patterned in a photolithography process, so as to form an array ofsensor pixels 120 as shown inFIG. 2 . - In other embodiments, the
photosensitive layer 124 may be a dual-band sensor, having two PIN structures (e.g., a vertical structure of p-i-n-i-p or n-i-p-i-n, or a horizontal structure of p-i-n and p-i-n), one PIN structure being sensitive to, for example, visible light (having a wavelength ranging between 400 nm and 700 nm), while the other PIN structure being sensitive to, for example, infrared light (having a wavelength ranging between 700 nm and 1 mm). The two PIN structures can be arranged vertically into a single stacked structure or horizontally into two stacked structures neighboring each other. - In one embodiment, the
photosensitive layer 124 may comprise silicon, germanium, selenium, SiGe, GaAs, InGaAs, SiC, GaN, CuO, CuSe, CuTe, CdS, CdSe, CdTe, InSb, CuInGaS, CuInGaSe, CuInGaTe, TeGeHg, CuInSe, CuInS, CuInTe, HgCdTe, or combinations thereof in an amorphous, crystalline, or polycrystalline form. For a sensor pixel array that is sensitive to visible light, amorphous silicon (a-Si) p-i-n stack can be formed directly using a PECVD process. Additionally or alternatively, other sensing elements can be formed with a sensing function layer sandwiched between the top and bottom electrodes. For example, a thermal image array can be formed with a thermo-electric layer that is sensitive to infrared light. In other embodiments, a scintillator film sensitive to X-ray can be formed in place of the p-i-n structure. See, for example, WO 2014/093244, published on Jun. 19, 2014, which is incorporated herein by reference. - In an alternative embodiment, the
photosensitive layer 124 may comprises a mixture of a p-type polymeric organic semiconductor (e.g., poly (3-hexylthiophene) or poly (3-hexylthiophene-2,5-diyl), also known as P3HT) and an n-type polymeric organic semiconductors (e.g., [6,6]-phenyl-methyl-butanoate C6i, also known as PCBs). See, for example, WO/2014/060693, published on Apr. 24, 2014, which is incorporated herein by reference. -
FIGS. 5A and 5B respectively illustrate a sectional view of animage sensor panel 100 in combination with a liquid crystal display (LCD)module 400 and an organic light emitting diode (OLED)display module 500, in accordance with embodiments of the present disclosure. Referring toFIG. 5A ,LCD module 400 includes abacklight module 410 configured to emit a planarlight source 20 of, for example, white color.Backlight module 410 may additionally include a first polarizer so as to make planarlight source 20 linearly polarized along a first direction.LCD module 400 further includes aTFT backplane 420 onbacklight module 410, aliquid crystal material 430 onTFT backplane 420, and acolor filter layer 440 onliquid crystal material 430. Theliquid crystal material 430 is enclosed betweenTFT backplane 420 andcolor filter layer 440.TFT backplane 420 includes display pixel electrodes to control the rotation orientation ofliquid crystal material 430 so as to rotate the polarization direction of planarlight source 20 at different pixel locations.Color filter 440 includes an array of color pixels (e.g., red, green, and blue) separated by a black matrix, each color pixel corresponding to a display pixel electrode ofTFT backplane 420, so as to generate colored output forLCD module 400.Color filter 400 may additionally include a second polarizer having a polarization direction perpendicular to that of the first polarizer ofbacklight module 410. - As shown in
FIG. 5A , an image sensor panel (ISP) 100 is disposed oncolor filter 440 and is enclosed in ahousing 300 together withLCD module 400. It is appreciated that, in certain embodiments,ISP 100 can be formed and integrated withcolor filter 440. An upper surface ofISP 100 is optically exposed to the exterior ofhousing 300 so as to allowlight source 20 to penetrate therethrough. As discussed above,ISP 100 includes a plurality of photosensitive pixels separated from each other to leave optically transparent regions. In one embodiment, the photosensitive pixels ofISP 100 are aligned with the black matrix ofcolor filter 440 so as not to interfere with the display quality. - Although, in certain embodiments,
ISP 100 of the present disclosure can be used in touch control applications,display module 400 may still include an optically transparent capacitive touch panel (not shown). The capacitive touch panel may be disposed ondisplay module 400 and betweenISP 100 andcolor filter 440. Alternatively, the capacitive touch panel may be disposed onISP 100 and can be in contact withIBS 10 when placed thereon. - Referring to
FIG. 5B ,OLED display module 500 includes aTFT backplane 510 having a plurality of light emitting pixels formed thereon and acover glass 520 onTFT backplane 510. As shown inFIG. 5B , an image sensor panel (ISP) 100 is disposed oncover glass 520 and is enclosed in ahousing 300 together withOLED display module 500. It is appreciated that, in certain embodiments,ISP 100 can be formed on and integrated withcover glass 520. An upper surface ofISP 100 is optically exposed to the exterior ofhousing 300 so as to allowlight source 20 to penetrate therethrough. As discussed above,ISP 100 includes a plurality of photosensitive pixels separated from each other to leave transparent regions. In one embodiment, the transparent regions (i.e., the area between photosensitive pixels) ofISP 100 are aligned with light emitting pixels of OLED display module, so as maintain display quality substantially unaffected. - In some embodiments,
display module 500 may additionally include an optically transparent capacitive touch panel (not shown). The capacitive touch panel may be disposed ondisplay module 500 and betweenISP 100 andcover glass 520. Alternatively, the capacitive touch panel may be disposed onISP 100 and can be in contact withIBS 10 when placed thereon. - Referring to both
FIGS. 5A and 5B , in operation, an information bearing substrate (IBS) 10, such as a document, can be placed onISP 100 with the information bearing surface contacting an upper surface ofISP 100, such that planarlight source 20 can be reflected fromIBS 10 to form reflectedlight 30. Sensor pixels ofISP 100 can then detect reflected light 30 fromIBS 10, thereby capturing textual or graphical information attached to the information bearing surface ofIBS 10. -
FIG. 6 illustrates a plane view of a sensor pixel array aligned with a black matrix of a display module, in accordance with an embodiment of the present disclosure.FIG. 7 illustrates a plane view of a sensor pixel array slightly misaligned with a black matrix of a display module, in accordance with an embodiment of the present disclosure.FIG. 8 illustrates a plane view of a sensor pixel array aligned with a black matrix of a display module, in accordance with an embodiment of the present disclosure. - Referring to
FIGS. 6 through 8 , different array configurations ofsensor pixels 120 can be used in combination withcolor display pixels 440 to capture optical images. In one embodiment, acolor display pixel 440 includes ared sub-pixel 442, agreen sub-pixel 444, and ablue sub-pixel 446.Color display pixel 440 may have a pixel size D (e.g., length or width) and asensor pixel 120 may have a sensor pixel size S (e.g., diameter). As shown inFIG. 6 , in one embodiment,sensor pixels 120 are separated with each other by about D/3. - As shown in
FIG. 7 , in another embodiment,sensor pixels 120 are separated with each other by about D/2. As shown inFIG. 8 , in still another embodiment,sensor pixels 120 are separated with each other by about 2D/3. As a result, the image sensor panel of the present disclosure can have a sensing resolution (monochrome) that is about double or triple of the display resolution. It is appreciated that color filters can be formed onsensor pixels 120 so as to capture colorful images using the image sensor panel of the present disclosure. - Referring to
FIG. 6 , sub-pixels 442, 444, and 446 are separated with each other by ablack matrix 448. In this embodiment, allsensor pixels 120 are aligned withblack matrix 448. Although, in certain cases, sensor pixel size S may be slightly greater than a width ofblack matrix 448 and thus slightly overlap withdisplay pixels 440, the display quality is substantially unaffected, because at least 90% of the display's light emitting area is not obstructed bysensor pixels 120. - Referring to
FIG. 7 , some ofsensor pixels 120 are misaligned withblack matrix 448. For example, as shown inFIG. 7 , one ofsensor pixels 120 overlaps withgreen sub-pixel 444. Although the display's light emitting area is somewhat obstructed by somesensor pixels 120, the display quality (e.g., homogeneity) may still be substantially unaffected, because sensor pixel size S may be much smaller than display pixel size D. Further, the display quality can be adjusted and fine tuned by calibrating the emission intension ofindividual display pixels 440 after an image sensor panel is disposed and adhered onto a display module. - Referring to
FIG. 8 , sub-pixels 442, 444, and 446 are separated with each other by ablack matrix 448 and allsensor pixels 120 are aligned withblack matrix 448. In this embodiment, sensor resolution is about 1.5 times of the display resolution. -
FIG. 9 illustrates a schematic circuit of asensor pixel 120, read by three thin film transistors (TFTs), in accordance with an embodiment of the present disclosure. In this embodiment,sensor pixel 120 includes afirst TFT 910, asecond TFT 920, athird TFT 930, and athin film photodiode 950. FirstTFT 910,second TFT 920, andthird TFT 930 are formed on aglass substrate 110, whilethin film photodiode 950 is stacked above first, second, andthird TFTs FIG. 9 , the gate offirst TFT 910 is coupled torow 140. The drain offirst TFT 910 is coupled tocolumn 130. The source offirst TFT 910 is coupled to the drain ofsecond TFT 920. The source ofsecond TFT 920 is coupled to a voltage source VDD or 922. The gate ofsecond TFT 920 is coupled to anode 940. The gate ofthird TFT 930 is coupled to areset signal line 934. The source ofthird TFT 930 is coupled to a reset voltage VRST or 932. The drain ofthird TFT 930 is coupled withnode 940. The cathode ofphotodiode 950 is coupled tonode 940. The anode ofphotodiode 950 is coupled to acommon ground 905. -
Third TFT 930 acts as a switch to resetphotodiode 950. Whenthird TFT 930 is turned on by an ON signal sent fromreset signal line 934,photodiode 950 is connected to the reset voltage 932 (or power supply), thereby clearing charge accumulated onnode 940.Second TFT 920 acts as a buffer (e.g., a source follower) and an amplifier, which allows pixel voltage ofphotodiode 950 to be observed without removing the accumulated charge. FirstTFT 910 acts as a switch to select one sensor pixel from an array of sensor pixels coupled withcolumns 130 androws 140, so as to be read the selected sensor pixel. Whenfirst TFT 910 is turned on in response to an ON signal fromrow 140, information corresponding to the pixel voltage ofphotodiode 950 can be measured throughcolumn 130. In one embodiment, voltage source VDD may be tied to the reset voltage 932 (or power supply) ofthird TFT 930. -
FIGS. 10A through 10D illustrate a layered structure ofsensor pixel 120 shown inFIG. 9 . It is appreciated that, unless otherwise stated herein, the electrically conductive lines (e.g., signal lines, metallic interconnects, etc.) discussed in the present disclosure have a line width of at least 5 um and a line separation of at least 3 um. Referring toFIGS. 10A through 10D together withFIG. 9 , agate electrode 911 offirst TFT 910, agate electrode 921 ofsecond TFT 920, and agate electrode 931 ofthird TFT 930 are formed on different locations ofsubstrate 110. - Referring to
FIG. 10A , resetsignal line 934 is formed onsubstrate 110, linearly traversing along a rear portion ofsensor pixel 120, and is electrically coupled togate electrode 931 throughinterconnect 936. Rowconductive line 140 is formed onsubstrate 110, linearly traversing a front portion ofsensor pixel 120, and is electrically coupled togate electrode 911 through ametallic interconnection 916. Ametallic interconnection 926 is formed onsubstrate 110 and is electrically coupled togate electrode 921. - Referring to
FIGS. 10A and 10C , a firstdielectric layer 960 having a thickness of about 0.2 um to 0.4 um is formed overgate electrodes signal line 934, rowconductive line 140, andmetallic interconnections dielectric layer 960 includes a viahole 927 formed by selective etching, so as to expose a portion ofmetallic interconnection 926 at a distal end fromgate electrode 921. In one embodiment, firstdielectric layer 960 comprises a low-k dielectric material and may be planarized for further processing. - Referring to
FIGS. 10B and 10D , achannel layer 904 is formed on firstdielectric layer 960 above bothgate electrodes channel layer 934 is formed on firstdielectric layer 960 abovegate electrode 931. In this embodiment, asingle channel layer 904 is shared betweengate electrodes second TFTs single channel layer 904, two separate channel layers may be formed on firstdielectric layer 960 respectively above and aligned withgate electrodes - Referring to
FIGS. 10B , 10C, and 10D, columnconductive line 130 is formed on firstdielectric layer 960, linearly traversing a right hand portion ofsensor pixel 120, and is electrically coupled to a right side of channel layer 904 (or first TFT 910) through source/drain electrode 913.Voltage source line 922 is formed on firstdielectric layer 960, linearly traversing a central portion ofsensor pixel 120, and is electrically coupled to a left side of channel layer 904 (or second TFT 920) through source/drain electrode 925.Reset voltage line 932 is formed on firstdielectric layer 960, linearly traversing a left hand portion ofsensor pixel 120, and is electrically coupled to a left side of channel layer 934 (or third TFT 930) through source/drain electrode 935. A metallic interconnection (or source/drain electrode) 933 is formed on firstdielectric layer 960 filling viahole 927, and is electrically coupled between a right side ofchannel layer 934 andgate electrode 921 throughmetallic interconnection 926. - In one embodiment, when
channel layer 904 includes a single layer which comprises a semiconductor material of relatively low electrical mobility (e.g., a-Si having an electron mobility of about 0.5˜1.0 cm2/(V·s) and IGZO having an electron mobility of about 1.0˜20.0 cm2/V·s), ametallic interconnection 905 is formed onchannel layer 904 and betweengate electrodes drain electrodes second TFTs channel layer 904 includes a single layer which comprises a semiconductor material of relatively high electrical mobility (e.g., LTPS having an electric mobility of at least 100.0 cm2/V·s),metallic interconnection 905 is not necessary for first andsecond TFTs channel layer 904 includes two separate and mutually insulating channel layers, ametallic interconnection 905 is formed on firstdielectric layer 960 and over sides of the two separate channel layers, so as to constitute source/drain electrodes - Referring to
FIGS. 10B and 10D , asecond dielectric layer 970 is formed on source/drain electrodes channel layers second dielectric layer 970 includes a viahole 942 formed by selective etching of seconddielectric layer 970 and may be planarized for further processing. As shown inFIG. 10D , asensor pixel electrode 122 is formed on seconddielectric layer 970 filling viahole 942, and is electrically coupled tothird TFT 930 through source/drain electrode 933. In one embodiment,sensor pixel electrode 122 may have a surface area substantially equivalent to that of a collection of first, second, andthird TFTs second dielectric layer 970 has a thickness ranging between 0.3 um and 2.0 um or at least 0.3 um, so as to prevent or at least reduce undesirable interferences to the underlyingTFTs -
FIG. 11 illustrates a perspective view of alaptop computer 1100 comprising a bidirectional display 1110 (including a display panel and an image sensor panel disposed on the display panel) in accordance with an embodiment of the present disclosure.Bidirectional display 1110 can be used to capture graphical information on an information bearing substrate (IBS) 1120. As shown inFIG. 11 , a user can use one hand to holdIBS 1120 with the information bearing surface (i.e., the surface having, for example, texts or graphics attached thereto) facing a screen surface ofbidirectional display 1110. The user can use another hand to trigger a scan event by pressing a button 1130 (e.g., a key on the keyboard) oflaptop computer 1100. In an alternative embodiment, the scan event may be automatically triggered onceIBS 1120 contacts and properly conforms to the screen surface ofbidirectional display 1110. - The information attached to
IBS 1120 can be optically captured bybidirectional display 1110 in response to the triggered scan event. In one embodiment,laptop computer 1100 may additional include a mechanical switch at a side of the keyboard portion oflaptop computer 1100 to turn on/off of the electrical power for the image sensor panel ofbidirectional display 1110, so as to reduce power consumption and enhance user privacy. It is appreciated that the mechanical switch may be implemented as a soft/virtual button and/or a function key or a combination of function keys on the keyboard. -
FIG. 12 illustrates a perspective view of asmartphone device 1200 comprising a bidirectional display 1210 (including a display panel and an image sensor panel disposed on the display panel) in accordance with an embodiment of the present disclosure.Bidirectional display 1210 can be used to optically capture an image copy of aninformation bearing substrate 1220. Referring toFIG. 12 ,smartphone device 1200 includesbidirectional display 1210, amini camera 1202 proximate a top side ofsmartphone device 1200, astart button 1240 proximate a bottom side ofsmartphone device 1200, and a power/lock button 1260 at a side ofsmartphone device 1200.Smartphone device 1200 may optionally include aprotective cover flap 1205 and optionally include anearphone 1250 having acontrol button 1230. - As shown in
FIG. 12 , a user can hold theIBS 1220 with the information-bearing surface facing a screen surface ofbidirectional display 1210. In one embodiment,protective cover flap 1205 may include anIBS holder 1206, which can be sized to accommodate, for example, a standard business card or credit card, such thatIBS 1220 can be held byprotective cover flap 1205 and scanned whenprotective cover flap 1205 is flipped and closed ontobidirectional display 1210. Depending on design choices, the user can trigger a scan event by pressingstart button 1240, pressingcontrol button 1230 ofearphone 1250, pressing power/lock button 1260, or a combination of the above. In another embodiment, a scan event may be triggered immediately afterIBS 1220 contacts and properly conforms to the screen surface ofbidirectional display 1210. - In yet another embodiment,
smartphone device 1200 may include one or more magnetic switches (not shown) disposed at one or various positions underneathbidirectional display 1210. In this embodiment, a user may trigger a scan event by closingcover flap 1205 ontobidirectional display 1210, and approaching and aligning one or more magnets to the magnetic switches. The magnets can be embedded incover flap 1205 or applied externally aftercover flap 1205 is covered onbidirectional display 1210. - As shown in
FIG. 12 ,IBS 1220 may have a substantially rectangular shape, but when placed on the display screen slightly rotated relative to the rectangular shape ofbidirectional display 1210. Accordingly, in one embodiment,smartphone device 1200 can first detect the boundary ofIBS 1220. Upon determination of the boundary ofIBS 1220, which may be slightly bigger than the actual area ofIBS 1220, the display panel ofbidirectional display 1210 can emit a probing light only within the IBS boundary. In response to triggering of the scan event, information attached to IBS 820 can be carried by reflected light, captured by the image sensor panel ofbidirectional display 1210, and converted into a digital image. -
FIG. 13 illustrates a perspective view of asmartphone device 1300 comprising a bidirectional display 1310 (including a display panel and an image sensor panel disposed on the display panel).Bidirectional display 1310 can be used to detect a user'sfinger drawing 1320, in accordance with an embodiment of the present disclosure. Referring toFIG. 13 , similar tosmartphone device 1200 ofFIG. 12 ,smartphone device 1300 includesbidirectional display 1310 and astart button 1340 proximate a bottom side ofsmartphone device 1320. Instead of emitting a probing light pulse, in a drawing detection mode, the image sensor panel ofbidirectional display 1310 can passively detect the user's contacts/drawings using the image sensor panel. Alternatively, the display panel ofbidirectional display 1310 can actively emit a constant intensity probing light during a time period thatbidirectional display 1310 is switched to the drawing detection mode. In one embodiment, when an object (such as a finger tip or stylus tip) is placed on or proximatebidirectional display 1310, it can sequentially sense the locations and/or directions of the object forming drawing 1320 onbidirectional display 1310, thereby detecting a shape or pattern of drawing 1320. In certain embodiments, the image sensor panel ofbidirectional display 1310 can be used in place of the existing capacitive touch sensitive panel. -
FIG. 14 illustrates a block diagram of anelectronic device 1400 in accordance with an embodiment of the present disclosure. As shown inFIG. 14 ,electronic device 1400 includes abidirectional display 1410, amemory 1420, aprocessor 1430, aninput device 1440, and astorage device 1450, which are electrically coupled with each other through asystem bus 1460.Bidirectional display 1400 includes adisplay panel image sensor panel 100 disposed ondisplay panel FIGS. 5A and 5B . In addition,bidirectional display 1410 includes asource control circuit 1404, agate control circuit 1406, acolumn decode circuit 1402, and arow decode circuit 1408.Source control circuit 1404 andgate control circuit 1406 are electrically coupled todisplay panel display panel Column decode circuit 1402 androw decode circuit 1408 are electrically coupled to sensor pixels ofimage sensor panel 100 through column decode lines and row decode lines, so as to control light detection of the sensor pixels ofimage sensor panel 100. - In one embodiment,
source control circuit 1404,gate control circuit 1406,column decode circuit 1402, androw decode circuit 1408 are respectively implemented in different integrated circuit (IC) chips. It is appreciated, however, that some or all ofsource control circuit 1404,gate control circuit 1406,column decode circuit 1402, androw decode circuit 1408 may be integrated in a single IC chip. Further,source control circuit 1404 andgate control circuit 1406 may be implemented as one IC chip, whilecolumn decode circuit 1402 androw decode circuit 1408 may be implemented as another IC chip. - In order to capture images using
bidirectional display 1410, a computer program product may be stored in storage device 1450 (e.g., hard drive, non-volatile solid state memory drive, and the like) and loaded to memory 1420 (e.g., random access memory (RAM) or other volatile memory) ofelectronic device 1400 for execution byprocessor 1430. In one embodiment, all or part of the computer program product may be included as add-on modules in an operating system (e.g., Linux, Android, iOS, etc.) for theelectronic device 1400. In another embodiment, the computer program product may be a standalone computer software application (e.g., a mobile app or a software application package) executable onelectronic device 1400 using resources of the operating system. In one embodiment, the computer program product includes a probingmodule 1421, alight detection module 1422, and animage assembly module 1425. In one embodiment, the computer program product additionally includes one or more of aboundary determination module 1423, aconformity determination module 1424, and an optical character recognition (OCR)module 1426. In one embodiment, the computer program product can further include aninterpreter module 1428, such as a scripting language software program configured to interpret lines of codes written in a specific scripting language and to instruct hardware ofelectronic device 1400 to perform the functions as provided in the lines of codes. - Probing
module 1421 comprises computer instructions to controlgate control circuit 1406 andsource control circuit 1404, such that probing signals can be transmitted to the light emitting elements ofdisplay panel -
Light detection module 1422 comprises computer instructions to controlcolumn decode circuit 1402 androw decode circuit 1408, such that light (e.g., reflected light from the IBS) entering the sensor pixels ofimage sensor panel 100 can be detected in response to a scan event. The detected raw image data may be transmitted to imageassembly module 1425 for further processing. -
Image assembly module 1425 comprises computer instructions to analyze the raw image data detected bylight detection module 1422, and assemble or generate a digital image data file from the raw image data. In one embodiment, the digital image data file can be a pixel-based image data file of a lossy/lossless compressed format (e.g., JPG, PNG, TIFF, etc.) or a pixel-based image data file of an uncompressed format (e.g., BMP). In one embodiment,image assembly module 1425 saves the generated digital image data file intostorage device 1450. The digital image data file is then ready for user access or further processing. - In one embodiment, the generated digital image data file is transmitted to or loaded by
OCR module 1426 for further processing.OCR module 1426 analyzes the digital image data file and extracts textual information from the image data file. The extracted textual information can be saved intostorage device 1450 as a text data file (e.g., TXT, DOC, etc.). Alternatively, the extracted textual information can be saved together with non-textual image data as a combined image/text data file (e.g., PDF). -
Boundary determination module 1423 comprises computer instructions to determine the boundary of an IBS placed on animage sensor panel 100 of the present disclosure. In one embodiment, upon triggering of a scan event,boundary determination module 1423 transmits an instruction set todetection module 1422 to passively monitor an IBS. Upon placing an IBS over a screen surface ofimage sensor panel 100, theboundary determination module 1422 captures a temporary image for the entire screen ofimage sensor panel 100. Becausedetection module 1422 passively monitors an IBS (i.e., without emitting a probing light), a relatively darker region in the temporary image may correspond to the IBS region, while a relatively brighter region in the temporary image may correspond to the non-IBS region. It is appreciated thatdetection module 1422 can monitor an IBS with a white probing light being constantly emitted. In such cases, a relatively brighter region in the temporary image may correspond to the IBS region, while a relatively darker region in the temporary image may correspond to the non-IBS region. - In one embodiment,
boundary determination module 1423 analyzes the temporary image and determines a boundary of the IBS in accordance with a brightness change in the temporary image. In one embodiment, prior to analyzing the temporary image,boundary determination module 1423 can adjust the temporary image by, for example, increasing contrast of the temporary image. In one embodiment,boundary determination module 1423 generates a boundary data file (comprising data points of the boundary locations) and save the boundary data file instorage device 1450. In one embodiment, the IBS may be a user's foot, and by placing the user's foot onimage sensor panel 100 of the present disclosure,boundary determination module 1423 can acquire boundary data of the user's foot. The boundary data can then be further analyzed and converted to a shoe size of the user, thereby determining inventory availability of footwear for the user. -
Conformity determination module 1424 comprises computer instructions to determine whether an IBS has been properly placed on a screen surface ofimage sensor panel 100. In one embodiment,conformity determination module 1240 monitors the sensor pixels ofimage sensor panel 100 and waits for an IBS. Once the sensor pixels detect that an IBS is placed onimage sensor panel 100, a temporary image may be captured and transmitted toconformity determination module 1424.Conformity determination module 1424 then analyzes the temporary image and determines whether the temporary image is substantially focused. Because no converging or diverging lens is included inbidirectional display panel 1410 of the present disclosure, the temporary image can be focused or not blurred only when the IBS contacts or is disposed very close to an upper surface ofimage sensor panel 100. If the temporary image is substantially focused or not blurred,conformity determination module 1424 then determines that the IBS is properly placed onimage sensor panel 100 and ready for the scan event. -
FIG. 15 illustrates a flow diagram for capturing graphical information from an information bearing substrate in accordance with an embodiment of the present disclosure. The method of the present disclosure can capture graphical information on a monochromic (black/white or grey scale) information bearing substrate or a colored information bearing substrate. - In one embodiment, in
Step 1501, an information bearing substrate (IBS) is placed in contact or in close proximity to a screen surface of a bidirectional display with an information-bearing surface facing the bidirectional display. InStep 1503, in response to a triggered scan event, a probing light of a single color is emitted from the bidirectional display panel to the IBS. InStep 1505, reflected light from the IBS is detected by an array of light detecting elements of the bidirectional display panel as raw image data. InStep 1507, a digital image data file of a predetermined format is constructed from the raw image data. InStep 1509, the digital image data file is stored in a computer memory for further processing. - In an alternative embodiment, Steps 1503 and 1505 can be repeated several times for capturing information on a colored IBS. For example, by sequentially (i) emitting red probing light and detecting reflected red light, (ii) emitting green probing light and detecting reflected green light, and (iii) emitting blue probing light and detecting reflected blue light, the bidirectional display of the present disclosure can generate colored raw image data for constructing a colored digital image data file.
-
FIGS. 16A and 16B illustrate abidirectional display 1600 configured as a 3D image sensor, in accordance with certain embodiments of the present disclosure. In one embodiment,image sensor panel 1610 ofbidirectional display 1600 may be divided into sub-regions using a software program product to capture images of an object from different angles. In one embodiment,bidirectional display 1600 may be a curved display having a concave active surface, such that different sub-regions ofimage sensor panel 1610 can take images of an object at different angles. Such images taken from different angles of the same object may be used to reconstruct a 3D image of the object. - In one embodiment,
bidirectional display 1600 may be a flat panel display having a flat display surface. For those flat panel devices, the image sensor panel ofdisplay device 1600 may additional include a micro lens array having a plurality of microlenses, each microlens being formed on an image sensor pixel, and the microlenses together forming an effective optical lens (e.g., a Fresnel lens) for certain desired optical functionality (e.g., focus, field of view, etc.) for the entire image sensor panel or sub-regions thereof. - Referring to
FIG. 16A , in one embodiment,image sensor panel 1610 can be divided into two sub-regions, i.e., aleft input region 1610L (effectively a first camera) and aright input region 1610R (effectively a second camera). Left andright input regions right input regions right input regions bidirectional display 1600, such that images taken byregions display device 1600 without horizontal or vertical scaling/distortion. - Referring to
FIG. 16B , in one embodiment,image sensor panel 1610 can be divided into four sub-regions, i.e., an upper-left input region 1610UL (effectively, a first camera), a lower-left input region 1610LL (effectively, a second camera), an upper-right input region 1610UR (effectively, a third camera), and a lower-right input region 1610LR (effectively, a fourth camera). Similar to inputregions FIG. 16A , input regions 1610UL, 1610LL, 1610UR, and 1610LR may be a rectangular area having equal widths and lengths (i.e., equal area). In one embodiment, input regions 1610UL, 1610LL, 1610UR, 1610LR may have an area that is a fraction of the total display area ofbidirectional display 1600. In one embodiment, input regions 1610UL, 1610LL, 1610UR, and 1610LR may have the same aspect ratio as that ofbidirectional display 1600, such that images taken by input regions 1610UL, 1610LL, 1610UR, and 1610LR can be displayed directly ondisplay device 1600 without horizontal or vertical scaling/distortion. Although two kinds of sub-region division are shown and described, it is appreciated that other types of sub-region division are possible without departing from the spirit and scope of the present disclosure. - The bidirectional display of the present disclosure can be used in various contexts. Below are several of such exemplary usage cases. It should be appreciated that the bidirectional display of the present disclosure can be used in various other contexts without departing from the spirit and scope of the present disclosure.
- In this example, a consumer's credit card is an IBS. Before completion of an online purchase, for example, a consumer is usually prompted to enter credit card information through an electronic commerce website or a mobile app. The required credit card information includes one or more of the credit card number (e.g., 16 digits), the expiration month/year, and the account holder's first and last names appearing on one side of the credit card, and the security code (3 or 4 digits) appearing on the other side of the credit card.
- With the bidirectional display of the present disclosure, an electronic commerce website or mobile app can employ a graphic user interface on the display panel to capture credit card information directly from the front and back surfaces of the consumer's credit card. As such, the consumer does not need to manually enter the credit card information at the conclusion of the online purchase. Moreover, the bidirectional display of the present disclosure can eliminate the need of a magnetic stripe reader for credit card transactions.
- In one embodiment, the graphic user interface on a bidirectional display includes a first rectangular area, which may have a physical area comparable to or slightly greater than the surface dimension of a standard credit card. The graphic user interface can then instruct the consumer to place his/her credit card on the bidirectional display and within the boundary of the first rectangular area, with the front or back surfaces of the credit card facing the bidirectional display. A scan event can then be triggered such that the electronic commerce website or mobile app can capture an image of the front or back surfaces of the credit card.
- In one embodiment, the captured image may be analyzed using an OCR module to acquire textual credit card information from the captured image. The textual credit card information may include credit card number, account holder name, expiration month/year, security code, etc. Thereafter, monetary transaction for the online purchase can be completed using the acquired credit card information. In one embodiment, the captured information can additional include an image of the consumer's hand-written signature or an image of the laser sticker on a side of the credit card, thereby enhancing the transaction security in electronic commerce.
- In this example, a consumer's foot is an IBS. Online purchase of attires and fashion accessories has become common practice for consumers with Internet access. When ordering, for example, footwear (especially children shoes) in an online purchase, it is often difficult to select the correct shoe size for the desired footwear style. Oftentimes, the shoe size numbering systems are inconsistent among different shoe makers/vendors, especially when they are based in different countries. That is, the same shoe size number of two shoe makers/vendors may correspond to two totally different actual physical sizes. Accordingly, a consumer often orders footwear of a wrong size and have to spend extra time and effort to return/exchange for a correct size.
- With the bidirectional display of the present disclosure, real size of an object can be accurately measured. For example, an electronic commerce website or mobile app can employ a graphic user interface on the bidirectional display and acquire foot size information through the graphic user interface. In one embodiment, the graphic user interface prompts the consumer to place a bare foot (such as a baby foot) on a bidirectional display. In an alternative embodiment, the consumer can first draw a foot print on a piece of paper by tracing an actual foot thereon, and then place the foot print paper on the bidirectional display for shoe size determination. A scan event can then be triggered such that foot print information can be captured directly from the bidirectional display. Thereafter, the electronic commerce website or mobile app can analyze the foot print information and determine a foot size, thereby determining a correct shoe size number for the desired footwear. Although the foot size determination may not be completely accurate, with the assistance of the bidirectional display of the present disclosure, the probability of ordering wrong sized footwear can be largely reduced.
- When a user's finger tip contacts or touches a screen surface of a bidirectional display, the soft and flexible finger tip become flattened and shows a circular/elliptical shape (or a touch shape) on the display screen. The photosensitive pixel array can “see” the touch shape and trigger a TOUCH_DOWN event in the electronic device of the present disclosure. When the finger leaves the screen surface of the bidirectional display, it triggers a TOUCH_UP event in the electronic device of the present disclosure. For example, one sequence of TOUCH_DOWN and TOUCH_UP events within a pre-determined time period constitutes a SINGLE_CLICK event. For example, two sequential TOUCH_DOWN and TOUCH_UP events within a pre-determined time period constitutes a DOUBLE_CLICK event. When the finger touches the screen surface of the bidirectional display and traverses on the screen surface, it triggers a DRAWING event, and the electronic device can then detect the drawing shape as an input.
- A smartphone device having a bidirectional display (including a display module and an image sensor panel) can be used to detect a user's fingerprint and/or other biometrics. A portion (e.g., a square/rectangular area) of the bidirectional display can be used to optically detect a fingerprint, while another portion/area of the bidirectional display can show the detected result in real time. The detected fingerprint can be compared with an existing finger print data stored in an electronic device to control access of the electronic device.
- A smartphone device having a bidirectional display (including a display panel and an image sensor panel) can be used to detect pulse rate or heard beat of a human being. For example, a user can place and press a finger (e.g., index finger or thumb) on the bidirectional display of a smartphone device. Then, the display panel can emit a light source of, for example, red color, to the finger and the image sensor panel can measure the light diffused in and reflected from the finger. The smartphone device can then analyze the temporal behavior of the reflected light detected by the image sensor panel to determine the heartbeat or pulse rate of the user.
- As discussed above, a smartphone device having a bidirectional display of the present disclosure can also be used to capture a fingerprint. It has been reported that existing fingerprint scanners can be tampered easily by using an image copy of the user's finger. As such, simultaneous measurement of both fingerprint and pulse rate can ensure that the fingerprint is captured from an actual and living person. Accordingly, the bidirectional display of the preset disclosure can achieve enhanced security to prevent unauthorized access of the smartphone device or other transactions.
- In one embodiment, a display screen of a smartphone device can include an image sensor panel of the present disclosure. The image sensor panel can include dual-band sensor pixels that are sensitive to both infrared and visible light. Because only a small number of infrared sensitive pixels are required to take temperature measurement, it is appreciated that not all of the sensor pixels on the image sensor panel need to be sensitive to infrared light. In this embodiment, a user can simply place a display screen of a smartphone device in contact with the user's body surface (e.g., forehead) to measure black body radiation of the user's body, thereby determining the body temperature of the user.
- In this example, an IBS can be a document, a sheet of paper, a business card, and the like, on which encoded markings, such as a QR-code, a bar code (1D or 2D), and the like, are printed or otherwise attached thereon. The encoded markings can be decoded using a pre-determined algorithm. It is appreciated that a smartphone screen can also serve as an IBS, and the encoded markings can be displayed on the smartphone screen.
- Various types of information can be included in the encoded markings. For example, the encoded markings can include address information of a desired destination (e.g., longitude, latitude, and/or sea level, or street address), computer instructions in textual form (e.g., computer codes written in a scripting language), media data in binary form (e.g., video data, audio data, image data, etc.), and the like. Any data included in the encoded markings on an IBS can be read by placing the IBS on an image sensor panel of the present disclosure. It is appreciated that, although focus is required, a rear or front camera of a smartphone device can also be used to read the IBS described herein.
- In one embodiment, a vehicle navigation system can include an image sensor panel on its display screen and the encoded markings of an IBS can include destination information (e.g., street address, or latitude and longitude). In operation, a user can place the IBS proximate to or in contact with the screen surface of the vehicle navigation system. The vehicle navigation system then reads the destination information from the IBS and, in response, automatically finds and shows the destination on its display screen within only a few seconds. The user can click a confirm/start button on the navigation system, thereby beginning navigation to the destination.
- In an alternative embodiment, a smartphone device can include an image sensor panel on its display screen and the encoded markings of an IBS can include computer instructions written in a scripting language. It is appreciated that the IBS having encoded markings can also be read using the rear or front camera of a smartphone device.
- For example, an IBS can include encoded markings of computer instructions to be used in an emergency situation, such as, a car accident. Such computer instructions can be, for example:
-
<Begin> Username = “John Doe”; InsuranceNo = “+1-202-321-9876”; PolicyNo = “001122334455”; Police = “911”; // Pre-defined variables Loc = GetLocation ( ); // Get current location information and output result to variable Loc = [X, Y], wherein X=latitude, Y=longitude Time = GetCurrentTime ( ); // Get current date and time and output result to variable Time Contact = GetPhoneNumber ( ); // Get phone number of the present device and output to variable Contact Msg1 = Call (Police, “$Username$ had a car accident at location $Loc$ on $Time$ and his/her contact number is $Contact$, please help!”); // Call police officer and provide information about the user's name, accident location and time, and the user's contact number. The output (e.g., success or fail) is saved in variable Msg1. Msg2 = Text (Insurance, “$Username$, whose policy number is $PolicyNo$ had a car accident at location $Loc$ on $Time$”); // Send text message to insurance company and provide information on the user's name, insurance policy number, and accident location and time. The output (e.g., success or fail) is saved in variable Msg2. <End> - When the IBS is scanned and read by an image sensor panel on a smartphone screen, for example, the above computer instructions trigger an interpreter module 1428 (see, for example,
FIG. 14 ) executed on the smartphone device to run the computer instructions. In this embodiment, the computer instructions define four variables representing the user's name (i.e., “John Doe”); the user's vehicle insurance policy number (i.e., “001122334455”); the insurance company's contact number (i.e., “+1-617-987-6543”); and the emergency help line number (“911”). Theinterpreter module 1428 of smartphone device then obtains the current location information of the user by calling function “GetLocation( )”, returns an output of latitude and longitude from the GPS component of the smartphone device, and write the output to variable “Loc” (e.g., Loc=[+42.12071232, −71.17251217], representing latitude and longitude of the accident location). Theinterpreter module 1428 also obtains the current date and time by calling function “GetCurrentTime( )” and obtains the smartphone device's phone number by calling function “GetPhoneNumber( )”. The outputs of the functions are respectively stored in variables Time (e.g., “Jan. 1, 2015, 11:59:59 AM”) and Contact (e.g., “+1-617-987-6543”). - In addition, the
interpreter module 1428 instructs the smartphone to call “911” recorded in variable “Police”. After being connected with “911”, theinterpreter module 1428 instructs the smartphone to audibly read out a sentence of, for example, “John Doe had a car accident at location [+42.12071232, −71.17251217], on Jan. 1, 2015, 11:59:59 AM and his/her contact number is +1-617-987-6543, please help.” If the above sentence is completely read to an officer, an output of SUCCESS will return from the function call and is written to the variable Msg1. Otherwise, an output of FAIL will return and write to variable Msg1. It is appreciated that, instead of calling the police by voice, the above sentence can be texted to a designated police station by using a “Text( )” function. Theinterpreter module 1428 can additionally or alternatively send a text message to the user's insurance company by calling a “Text( )” function. In this embodiment, theinterpreter module 1428 sends to the insurance company a text message string of, for example, “John Doe, whose policy number is 001122334455, had a car accident at location [+42.12071232, −71.17251217], on Jan. 1, 2015, 11:59:59 AM.” If the above text message string is sent to the insurance company, an output of SUCCESS will return from the function call and is written to the variable Msg2. - The bidirectional display device of the present disclosure can be used as a touchless user interface. In one scenario, a person playing a video game may stand or sit in front of a bidirectional display device of the present disclosure. For example, referring to
FIG. 16A , the gaming software can configureimage sensor panel 1610 into twoinput regions input regions - For the purposes of describing and defining the present disclosure, it is noted that terms of degree (e.g., “substantially,” “slightly,” “about,” “comparable,” etc.) may be utilized herein to represent the inherent degree of uncertainty that may be attributed to any quantitative comparison, value, measurement, or other representation. Such terms of degree may also be utilized herein to represent the degree by which a quantitative representation may vary from a stated reference (e.g., about 10% or less) without resulting in a change in the basic function of the subject matter at issue.
- Although various embodiments of the present disclosure have been described in detail herein, one of ordinary skill in the art would readily appreciate modifications and other embodiments without departing from the spirit and scope of the present disclosure.
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Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160041667A1 (en) * | 2014-08-06 | 2016-02-11 | Everdisplay Optronics (Shanghai) Limited | Organic Light-Emitting Diode Touch Display Panel |
US9501810B2 (en) * | 2014-09-12 | 2016-11-22 | General Electric Company | Creating a virtual environment for touchless interaction |
TWI566187B (en) * | 2015-11-04 | 2017-01-11 | Fingerprint identification unit | |
US20170097702A1 (en) * | 2015-10-01 | 2017-04-06 | Bidirectional Display, Inc. | Optical-capacitive sensor panel device and method for manufacturing same |
WO2018093798A1 (en) * | 2016-11-15 | 2018-05-24 | Bidirectional Display Inc. | Apparatus and method for optically capturing fingerprint or other images on display screen |
US20180198980A1 (en) * | 2017-01-06 | 2018-07-12 | Intel Corporation | Integrated Image Sensor and Display Pixel |
CN108596015A (en) * | 2018-01-31 | 2018-09-28 | 北京小米移动软件有限公司 | Display module and preparation method thereof, display device |
US20180365469A1 (en) * | 2016-07-08 | 2018-12-20 | Shanghai Oxi Technology Co., Ltd | Optical Fingerprint Module |
CN109471490A (en) * | 2017-09-08 | 2019-03-15 | 奇景光电股份有限公司 | It is embedded with the flat-panel monitor and forming method thereof of fingerprint sensing device |
US20190302935A1 (en) * | 2018-03-30 | 2019-10-03 | Sharp Kabushiki Kaisha | Touch sensor feedlines for display |
US11211433B2 (en) | 2020-05-04 | 2021-12-28 | Intel Corporation | In-display sensors and viewing angle adjustment microassemblies |
US11355538B2 (en) * | 2017-08-15 | 2022-06-07 | Bidirectional Display, Inc. | Image sensor panel and method for fabricating the same |
US20220206577A1 (en) * | 2020-12-31 | 2022-06-30 | Lg Display Co., Ltd. | Image display device and bio-signal detecting method using the same |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20150120730A (en) * | 2014-04-18 | 2015-10-28 | 삼성전자주식회사 | Display module equipped with physical button and image sensor and method of manufacturing thereof |
WO2015186266A1 (en) * | 2014-06-06 | 2015-12-10 | コニカミノルタ株式会社 | Organic electroluminescence module, smart device, and illumination device |
US20160335621A1 (en) * | 2015-05-12 | 2016-11-17 | Gopesh Kumar | Method for Providing Secured Card Transactions During Card Not Present (CNP) Transactions |
CN105161011B (en) * | 2015-08-11 | 2018-12-04 | 京东方科技集团股份有限公司 | Display panel and preparation method thereof, display device and intelligent wearable device |
CN105224138B (en) * | 2015-10-22 | 2019-04-19 | 京东方科技集团股份有限公司 | Suspension touch control display device |
CN106707576A (en) | 2015-11-13 | 2017-05-24 | 小米科技有限责任公司 | LCD panel, terminal and photosensory control method thereof |
KR102564805B1 (en) * | 2016-04-25 | 2023-08-10 | 에스케이하이닉스 주식회사 | Image Sensors Having Outer and Inner Address Markers |
CN108122941A (en) * | 2016-11-28 | 2018-06-05 | 南昌欧菲生物识别技术有限公司 | Organic light-emitting diode (OLED) display screen fingerprint identification device and electronic equipment |
KR102570180B1 (en) * | 2016-11-28 | 2023-08-25 | 엘지디스플레이 주식회사 | Electroluminescent display device integrated with fingerprint sensor |
CN106847872B (en) * | 2017-03-24 | 2020-03-20 | 京东方科技集团股份有限公司 | Display device |
CN107153483B (en) * | 2017-05-09 | 2019-12-03 | 京东方科技集团股份有限公司 | A kind of touch-control display module, display device and its driving method |
US10225458B2 (en) * | 2017-07-07 | 2019-03-05 | HKC Corporation Limited | Display panel and display apparatus using the same |
Citations (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5483263A (en) * | 1993-07-05 | 1996-01-09 | U.S. Philips Corporation | Electro-optic device |
US5917464A (en) * | 1994-10-18 | 1999-06-29 | Xerox Corporation | Combination of 2-D detector array with display for image processing |
US20050200293A1 (en) * | 2004-02-24 | 2005-09-15 | Naugler W. E.Jr. | Penlight and touch screen data input system and method for flat panel displays |
US20080266273A1 (en) * | 2007-04-24 | 2008-10-30 | White Electronic Designs Corp. | Interactive display system |
US20090295692A1 (en) * | 2008-05-27 | 2009-12-03 | Kyung Eon Lee | Liquid crystal display device |
US20100193804A1 (en) * | 2007-06-21 | 2010-08-05 | Christopher Brown | Photodetector and display device provided with the same |
US20100283771A1 (en) * | 2009-05-06 | 2010-11-11 | Samsung Electronics Co., Ltd | Information detecting display device and method for detecting information in the display device |
US20100321341A1 (en) * | 2009-06-18 | 2010-12-23 | An-Thung Cho | Photo sensor, method of forming the same, and optical touch device |
US20110018893A1 (en) * | 2009-07-27 | 2011-01-27 | Dong-Kwon Kim | Sensing device and method of sensing a light by using the same |
US20110032461A1 (en) * | 2009-08-05 | 2011-02-10 | Samsung Electronics Co., Ltd. | Visible-light blocking member, infrared sensor including the visible-light blocking member, and liquid crystal display device including the infrared sensor |
US20110057189A1 (en) * | 2009-09-08 | 2011-03-10 | Samsung Electronics Co., Ltd. | Display device and manufacturing method thereof |
US20120138775A1 (en) * | 2010-12-01 | 2012-06-07 | Samsung Electronics Co., Ltd. | Data sampler, data sampling method, and photo detecting apparatus including data sampler |
US20130076695A1 (en) * | 2011-09-27 | 2013-03-28 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Interactive printed surface |
US20130141354A1 (en) * | 2011-12-05 | 2013-06-06 | Mei Ching TSAI | Image-capturing touch panel |
US20130278577A1 (en) * | 2012-04-24 | 2013-10-24 | Beong-Hun Beon | Sensing device and method for sensing image |
US20140022431A1 (en) * | 2012-07-19 | 2014-01-23 | Nanyang Innovation & Enterprise Office | Cmos image sensor |
US20140085245A1 (en) * | 2012-09-21 | 2014-03-27 | Amazon Technologies, Inc. | Display integrated camera array |
US8760431B2 (en) * | 2008-07-17 | 2014-06-24 | Samsung Display Co., Ltd. | Display apparatus |
US20140354905A1 (en) * | 2013-06-03 | 2014-12-04 | Qualcomm Incorporated | Multifunctional pixel and display |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5243332A (en) | 1991-10-31 | 1993-09-07 | Massachusetts Institute Of Technology | Information entry and display |
US7535468B2 (en) | 2004-06-21 | 2009-05-19 | Apple Inc. | Integrated sensing display |
KR101211345B1 (en) | 2005-12-14 | 2012-12-11 | 엘지디스플레이 주식회사 | Liquid Crystal Display Device And Method For Fabricating Thereof |
TWI398707B (en) | 2008-05-16 | 2013-06-11 | Au Optronics Corp | Photo sensitive unit and pixel structure and liquid crystal display panel having the same |
US8803814B2 (en) | 2009-03-13 | 2014-08-12 | Adobe Systems Incorporated | Surface scanning with a capacitive touch screen |
US8982099B2 (en) | 2009-06-25 | 2015-03-17 | Semiconductor Energy Laboratory Co., Ltd. | Touch panel and driving method of the same |
JP5721994B2 (en) | 2009-11-27 | 2015-05-20 | 株式会社ジャパンディスプレイ | Radiation imaging device |
NO20093601A1 (en) | 2009-12-29 | 2011-06-30 | Idex Asa | surface Sensor |
US9632344B2 (en) | 2010-07-09 | 2017-04-25 | Lester F. Ludwig | Use of LED or OLED array to implement integrated combinations of touch screen tactile, touch gesture sensor, color image display, hand-image gesture sensor, document scanner, secure optical data exchange, and fingerprint processing capabilities |
KR102021908B1 (en) | 2011-05-03 | 2019-09-18 | 삼성전자주식회사 | Optical touch screen apparatus and method of driving the optical touch screen apparatus |
EP2715804B1 (en) | 2011-05-31 | 2016-07-06 | Fraunhofer Gesellschaft zur Förderung der angewandten Forschung E.V. | Bidirectional display and triggering thereof |
FR2977080B1 (en) | 2011-06-22 | 2014-01-10 | Commissariat Energie Atomique | ORGANIC PHOTODIODE WITH AN ACTIVE ZONE HAVING MEANS TO PROMOTE THE COLLECTION AND CONDUCTION OF LOAD CARRIERS |
US8796682B2 (en) | 2011-11-11 | 2014-08-05 | Semiconductor Energy Laboratory Co., Ltd. | Method for manufacturing a semiconductor device |
EP2958052B1 (en) | 2012-04-10 | 2020-10-07 | Idex Asa | Biometric sensing |
KR20130126228A (en) | 2012-05-11 | 2013-11-20 | 크루셜텍 (주) | Matrix switching type touch screen panel having pressure sensor |
CN111176516B (en) | 2012-05-18 | 2023-10-20 | 苹果公司 | Apparatus, method and graphical user interface for manipulating a user interface |
FR2996933B1 (en) | 2012-10-15 | 2016-01-01 | Isorg | PORTABLE SCREEN DISPLAY APPARATUS AND USER INTERFACE DEVICE |
US8962377B2 (en) | 2012-12-13 | 2015-02-24 | Cbrite Inc. | Pixelated imager with motfet and process |
NO20131423A1 (en) | 2013-02-22 | 2014-08-25 | Idex Asa | Integrated fingerprint sensor |
US9984270B2 (en) | 2013-08-05 | 2018-05-29 | Apple Inc. | Fingerprint sensor in an electronic device |
-
2015
- 2015-04-20 US US14/690,495 patent/US9122349B1/en not_active Expired - Fee Related
Patent Citations (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5483263A (en) * | 1993-07-05 | 1996-01-09 | U.S. Philips Corporation | Electro-optic device |
US5917464A (en) * | 1994-10-18 | 1999-06-29 | Xerox Corporation | Combination of 2-D detector array with display for image processing |
US20050200293A1 (en) * | 2004-02-24 | 2005-09-15 | Naugler W. E.Jr. | Penlight and touch screen data input system and method for flat panel displays |
US20080266273A1 (en) * | 2007-04-24 | 2008-10-30 | White Electronic Designs Corp. | Interactive display system |
US20100193804A1 (en) * | 2007-06-21 | 2010-08-05 | Christopher Brown | Photodetector and display device provided with the same |
US20090295692A1 (en) * | 2008-05-27 | 2009-12-03 | Kyung Eon Lee | Liquid crystal display device |
US8760431B2 (en) * | 2008-07-17 | 2014-06-24 | Samsung Display Co., Ltd. | Display apparatus |
US20100283771A1 (en) * | 2009-05-06 | 2010-11-11 | Samsung Electronics Co., Ltd | Information detecting display device and method for detecting information in the display device |
US20100321341A1 (en) * | 2009-06-18 | 2010-12-23 | An-Thung Cho | Photo sensor, method of forming the same, and optical touch device |
US20110018893A1 (en) * | 2009-07-27 | 2011-01-27 | Dong-Kwon Kim | Sensing device and method of sensing a light by using the same |
US20110032461A1 (en) * | 2009-08-05 | 2011-02-10 | Samsung Electronics Co., Ltd. | Visible-light blocking member, infrared sensor including the visible-light blocking member, and liquid crystal display device including the infrared sensor |
US20110057189A1 (en) * | 2009-09-08 | 2011-03-10 | Samsung Electronics Co., Ltd. | Display device and manufacturing method thereof |
US20120138775A1 (en) * | 2010-12-01 | 2012-06-07 | Samsung Electronics Co., Ltd. | Data sampler, data sampling method, and photo detecting apparatus including data sampler |
US20130076695A1 (en) * | 2011-09-27 | 2013-03-28 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Interactive printed surface |
US20130141354A1 (en) * | 2011-12-05 | 2013-06-06 | Mei Ching TSAI | Image-capturing touch panel |
US20130278577A1 (en) * | 2012-04-24 | 2013-10-24 | Beong-Hun Beon | Sensing device and method for sensing image |
US8947411B2 (en) * | 2012-04-24 | 2015-02-03 | Samsung Display Co., Ltd. | Sensing device and method for sensing image |
US20140022431A1 (en) * | 2012-07-19 | 2014-01-23 | Nanyang Innovation & Enterprise Office | Cmos image sensor |
US20140085245A1 (en) * | 2012-09-21 | 2014-03-27 | Amazon Technologies, Inc. | Display integrated camera array |
US20140354905A1 (en) * | 2013-06-03 | 2014-12-04 | Qualcomm Incorporated | Multifunctional pixel and display |
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