WO2022151834A1 - Écran d'affichage et dispositif d'affichage - Google Patents

Écran d'affichage et dispositif d'affichage Download PDF

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Publication number
WO2022151834A1
WO2022151834A1 PCT/CN2021/131441 CN2021131441W WO2022151834A1 WO 2022151834 A1 WO2022151834 A1 WO 2022151834A1 CN 2021131441 W CN2021131441 W CN 2021131441W WO 2022151834 A1 WO2022151834 A1 WO 2022151834A1
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WO
WIPO (PCT)
Prior art keywords
signal line
wiring
area
display screen
light
Prior art date
Application number
PCT/CN2021/131441
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English (en)
Chinese (zh)
Inventor
谭文
孙舟
Original Assignee
Oppo广东移动通信有限公司
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Publication date
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Publication of WO2022151834A1 publication Critical patent/WO2022151834A1/fr

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H10K59/353—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels characterised by the geometrical arrangement of the RGB subpixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/131—Interconnections, e.g. wiring lines or terminals
    • H10K59/1315—Interconnections, e.g. wiring lines or terminals comprising structures specially adapted for lowering the resistance

Definitions

  • the present application relates to the field of display technology, and in particular, to a display screen and a display device.
  • a display screen and a display device are provided.
  • a display screen the display screen includes a first area and a second area connected to the first area, the display screen includes:
  • a light-emitting component arranged in the first area, and ambient light can be incident on the photosensitive element through the first area;
  • the driving component is used for driving the light-emitting component to emit light
  • the plurality of wiring layers are stacked in a first direction, the first direction is parallel to the thickness direction of the display screen, and a plurality of signal wirings are formed in the wiring layer, A plurality of the signal traces are used to connect the light-emitting component and the driving component;
  • the coupling capacitances of each of the signal lines are all set within the same preset range, and the coupling capacitances include mutual capacitance and self capacitance.
  • a display device comprising:
  • Ambient light can be incident to the photosensitive element through the first region.
  • FIG. 1 is a schematic structural diagram of a display device according to an embodiment
  • FIG. 2 is a schematic cross-sectional view of the display device of the embodiment of FIG. 1 along the A-A direction;
  • FIG. 3 is a schematic structural diagram of a display device according to another embodiment
  • FIG. 4 is a schematic structural diagram of a display screen according to an embodiment
  • FIG. 5 is one of the schematic cross-sectional views of the wiring layer according to an embodiment
  • FIG. 6 is a second schematic cross-sectional view of a wiring layer according to an embodiment
  • FIG. 7 is a schematic diagram of an arrangement of light-emitting elements according to an embodiment
  • FIG. 8 is a second schematic diagram of an arrangement of light-emitting elements according to an embodiment
  • FIG. 9 is a third schematic diagram of an arrangement of light-emitting elements according to an embodiment.
  • FIG. 10 is a third cross-sectional view of a wiring layer according to an embodiment
  • FIG. 11 is a fourth cross-sectional view of a wiring layer according to an embodiment
  • FIG. 12 is a fifth cross-sectional view of a wiring layer according to an embodiment
  • FIG. 13 is a sixth cross-sectional view of a wiring layer according to an embodiment
  • FIG. 14 is a seventh cross-sectional view of a wiring layer according to an embodiment
  • 15 is a schematic diagram of an overlapping area of an embodiment
  • 16 is an eighth cross-sectional view of a wiring layer according to an embodiment
  • 17 is a ninth cross-sectional view of a wiring layer according to an embodiment
  • FIG. 19 is a circuit diagram of a driving unit according to an embodiment.
  • first, second, etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, a first region could be termed a second region, and, similarly, a second region could be termed a first region, without departing from the scope of this application. Both the first region and the second region are regions, but they are not the same region.
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with “first”, “second” may expressly or implicitly include at least one of that feature.
  • plural means at least two, such as two, three, etc., unless expressly and specifically defined otherwise.
  • severeal means at least one, such as one, two, etc., unless expressly and specifically defined otherwise.
  • FIG. 1 is a schematic structural diagram of a display device according to an embodiment
  • FIG. 2 is a schematic cross-sectional view of the display device in the embodiment of FIG. 1 along the A-A direction.
  • the display screen can be divided into first The area 11 (the area in the dotted circle in FIG.
  • the ambient light can be incident to the photosensitive element 20 through the first area 11, the second area 12 is connected to the first area 11, and the first area 11 can Including the first display area, the second area 12 may include a second display area and a non-display area.
  • the non-display area can be used to set circuits or other stacking structures inside the display screen.
  • the non-display area can be used to set a display driver chip, and the display driver chip generates a driving signal according to the image to be displayed to drive the first display area and the second display area.
  • the display area displays the image.
  • the non-display area can also be omitted, that is, the display screen realizes full-screen display, excluding the part that cannot display the picture.
  • the display device may be a mobile phone, a tablet computer, a notebook computer, a personal digital assistant, a television, a multimedia display screen and other devices equipped with a photosensitive device under the screen.
  • the photosensitive device 20 can be an ambient light sensor, the ambient light sensor can sense the brightness of the electronic device, and the electronic device can adjust the luminous brightness of the display screen according to the brightness of the electronic device.
  • the photosensitive device 20 can also be an optical distance sensor, and the optical distance sensor can receive the light reflected by the target object, so that the electronic device can judge the distance between the target object and the electronic device.
  • the photosensitive device 20 can also be a camera, and the camera is provided with a plurality of sensors arranged in an array, and a complete image is formed according to the photosensitive result of each sensor.
  • the photosensitive device 20 can also be an optical fingerprint sensor. By receiving the light reflected from the finger, the optical fingerprint sensor can identify the protrusions and depressions on the finger, thereby realizing fingerprint identification.
  • FIG. 3 is a schematic structural diagram of a display device according to another embodiment.
  • the first area 11 is a rectangle and is located at the top of the display device.
  • specific description is given by taking the photosensitive device as an under-screen camera as an example.
  • FIG. 4 is a schematic structural diagram of a display screen according to an embodiment. It should be noted that, in order to simplify the drawing, FIG. 4 only shows the first area 11 , the driving component 200 and a plurality of signal lines, but does not show the first area 11 , the driving component 200 and a plurality of signal lines. A plurality of light-emitting elements in an area 11 and structures such as the frame of the display screen, referring to FIG. 4 , the display screen includes a light-emitting component 100 , a driving component 200 and a plurality of wiring layers (not shown).
  • the light-emitting component 100 is disposed in the first area 11, and the light-emitting component 100 includes a plurality of pixel units 110 arranged in an array, and each of the pixel units 110 respectively includes a plurality of light-emitting elements, and the light-emitting elements may be, but are not limited to, a plurality of micro- LED, organic light-emitting diode (Organic Light-Emitting Diode, OLED), inorganic light-emitting diode and other light-emitting elements, etc.
  • OLED Organic Light-Emitting Diode
  • this embodiment is described by taking the light-emitting assembly 100 including a plurality of organic light-emitting diodes as an example, and the organic light-emitting diodes include an anode, a light-emitting layer, and a cathode that are stacked and sequentially arranged.
  • the light-emitting layer at least includes a light-emitting material layer, the light-emitting material layer includes an organic light-emitting material, and a light-emitting material with an appropriate light-emitting wavelength can be set according to display requirements.
  • the light emitting layer may further comprise at least one of a hole injection layer (HIL), a hole transport layer (HTL), a hole blocking layer (HBL), an electron transport layer (ETL) and an electron injection layer (EIL),
  • HIL hole injection layer
  • HTL hole transport layer
  • HBL hole blocking layer
  • ETL electron transport layer
  • EIL electron injection layer
  • the materials of the cathode and the anode of this embodiment are both transparent conductive materials, such as indium tin oxide.
  • the driving component 200 is disposed in the second area 12, the second area 12 is adjacent to the first area 11, the driving component 200 is used for driving the light-emitting component 100 to emit light, and the driving component 200 includes a plurality of driving units , each driving unit is used to drive at least one light-emitting element to emit light.
  • the driving unit corresponds to the light-emitting element one-to-one, and the driving unit is configured to drive the corresponding light-emitting element to emit light.
  • one driving unit may also correspond to two or more light-emitting elements, and the driving unit sends the same driving signal to the two or more light-emitting elements synchronously, which effectively saves the material cost of the driving circuit and its space cost; in some embodiments, two light-emitting elements connected to the same driving unit can be distributed on opposite sides of the display screen, so as to save the driving circuit on the one hand, and realize a dual Display device with surface display function.
  • the driving unit may include, for example, a storage capacitor and several switching elements, and the switching elements may be any type of transistor, such as a bipolar junction transistor (BJT), a field effect transistor (FET) or a thin film transistor (Thin Film Transistor, TFT) etc.
  • the field effect transistor can specifically be a metal oxide semiconductor field effect transistor (Metal Oxide Semiconductor Field Effect Transistor, MOSFET), for example, an N-type metal oxide semiconductor transistor (N-Metal-Oxide-Semiconductor, NMOS) or a P-type metal oxide Semiconductor tube (P-Metal-Oxide-Semiconductor, PMOS).
  • MOSFET Metal Oxide Semiconductor Field Effect Transistor
  • the driving assembly 200 can be disposed in the second display area in the second area 12 to shorten the length of the signal trace, thereby improving the anti-interference ability and reliability of the signal transmission signal by the signal trace, and can also reduce the impact on the non-display area. occupied area, so as to narrow the frame size of the display device and improve the aesthetics of the display device.
  • the driving component 200 can also be disposed in the non-display area of the second area 12. It is understood that the driving component 200 usually includes more switching transistors, capacitors and other structures. Therefore, arranging the driving component 200 in the non-display area can reduce the The circuit design difficulty of the display device can also improve the manufacturing difficulty and yield of the display device.
  • This embodiment does not specifically limit the position of the driving assembly 200 , it is only necessary that the driving assembly 200 is disposed outside the first area 11 , so as to improve the light transmittance of the first area 11 , and can effectively avoid the diffraction problem during shooting by the camera .
  • FIGS. 5 to 6 and FIGS. 10 to 17 provide embodiments in which multiple signal traces are arranged in different trace layers 300 , and a plurality of said trace layers 300 are stacked and sequentially arranged in the first direction.
  • the first direction is parallel to the thickness direction of the display screen, that is, the direction perpendicular to the display surface of the display screen
  • the wiring layer 300 is formed with a plurality of signal wirings, and a plurality of the signal wirings are used for
  • a plurality of signal wirings in each wiring layer can be stacked and arranged in the first direction, thereby narrowing the signal wirings
  • the overall wiring width in the plane perpendicular to the first direction reduces the area occupied by the signal wiring in the display surface of the display screen, thereby effectively expanding the area actually used for display.
  • each of the driving units is connected to the light-emitting element through a corresponding signal line; in other embodiments, Each driving unit can be respectively connected to the two light-emitting elements through two signal lines.
  • the coupling capacitances of each of the signal lines are within the same preset range, and the coupling capacitances at least include mutual capacitance and self capacitance.
  • the mutual capacitance refers to the parasitic capacitance between the two signal traces
  • the self-capacitance refers to the parasitic capacitance between the signal trace and the ground trace 400 .
  • the threshold value can be considered to be within the preset range if it floats within a certain percentage range.
  • the range can be 99% ⁇ C threshold to 101% ⁇ C threshold.
  • the preset range is 0.99 ⁇ F to 1.01 ⁇ F.
  • the signal wiring between the driving component 200 in the second area 12 and the light emitting component 100 in the first area 11 is relatively long, so a large coupling capacitance will be generated on the signal wiring.
  • the driving element 200 outputs a driving signal to drive the light emitting element 100 located in the first region 11 to emit light
  • the driving signal will fully charge the parasitic capacitance before driving the light emitting element 100 to emit light.
  • the self-capacitance and mutual capacitance of each signal trace will not be exactly the same, resulting in different loads of different drive units. , which leads to the problem of uneven vertical display when the display screen is displayed.
  • the coupling capacitance of each signal trace within the same preset range, the load difference between different driving units can be reduced, thereby improving the display uniformity of the display screen.
  • FIG. 5 is a schematic cross-sectional view of a wiring layer 300 according to an embodiment.
  • FIG. 5 includes a plurality of wiring layers 300 in the display screen of the embodiment of FIG. 4 along three directions of AA', BB' and CC'.
  • a cross-sectional schematic diagram, in the cross-sectional schematic diagrams of other embodiments, AA', BB' and CC' are also cross-sectional schematic diagrams of multiple wiring layers 300 in the display screen of the embodiment of FIG. Let's go into details.
  • a plurality of the signal lines are divided into a plurality of signal line groups 310 , and the same filling method in FIG. 5 is a plurality of lines in the same signal line group 310
  • the first signal line group 311 includes a plurality of first signal lines 3111
  • the second signal line group 312 includes a plurality of second signal lines 3121
  • the third signal line group 313 includes a plurality of third signal lines 3131
  • the plurality of the signal lines in the same signal line group 310 do not overlap each other in the first direction, so as to avoid the gap between the signal lines in the same signal line group 310
  • Mutual capacitances are generated with each other, so as to prevent the coupling capacitances of multiple signal lines in a signal line group 310 from being too large, thereby improving the matching of coupling capacitances between different signal line groups 310 .
  • a plurality of the signal lines in the same signal line group 310 may be parallel to each other, wherein, being parallel to each other means that each signal line extends in the same way, and the included angle between the two signal lines is smaller than a predetermined angle.
  • the angle threshold it can be considered that the two signal traces are parallel, and the preset angle threshold can be, for example, 0.01°. It can be understood that by setting multiple signal lines in the same signal line group to be parallel to each other, the coupling capacitance on each signal line can be evaluated in large quantities, especially for 2K and other display devices with higher resolution. This greatly simplifies the design difficulty of signal routing.
  • the display screen includes three wiring layers 300 , namely, the bottom wiring layer 301 , the middle wiring layer 302 and the top wiring layer 303 in the cross-sectional view along the BB′ direction.
  • the bottom wiring layer 301 is the wiring layer 300 on the side close to the backplane
  • the top wiring layer 303 is the wiring layer 300 on the side close to the cover plate
  • the middle wiring layer 302 is arranged on the bottom wiring layer
  • the distances between the wiring layers 300 may be the same or different, and may be set by adjusting the thickness of the insulating layer between adjacent wiring layers 300 .
  • each trace layer 300 can be arranged at equal distances, which can effectively reduce the influence of the trace layer spacing on the coupling capacitance, so that Improve the design reliability of coupling capacitors for signal traces.
  • multiple signal traces in the same signal wire group 310 are formed in the same trace layer 300 to avoid excessive mutual capacitance between multiple signal traces in the same signal wire group , and at least two of the signal line groups 310 are formed in different trace layers 300 , so that equal mutual capacitances are effectively generated between different signal line groups, thereby improving the mutual capacitance between different signal line groups. Matching of coupling capacitors. Further, different signal line groups 310 are formed in different wiring layers 300 .
  • the plurality of first signal wires 3111 in the first signal wire group 311 are formed in the bottom wire layer 301
  • the plurality of second signal wires 3121 in the second signal wire group 312 are formed in the middle wire layer 302
  • a plurality of third signal wires 3131 in the third signal wire group 313 are formed in the top wire layer 303 .
  • the relationship can also be set correspondingly according to the setting method of the signal line group 310 .
  • the wiring layer 300 is divided into a plurality of wiring areas, and a plurality of the wiring areas are adjacent in a plane perpendicular to the first direction, such as the first wiring in FIG. 4 .
  • the routing mode of each signal line group 310 in a single routing area remains unchanged, and a plurality of the signal line groups 310 are routed in each of the The relative positional relationship within the line area is not exactly the same.
  • the routing mode of each signal line group 310 in a single routing area remains unchanged refers to a cross-sectional view formed at any position in the first routing area 321 in FIG. 4 along the extending direction of the routing.
  • are cross-sectional views in the direction of AA′ in FIG. 5 are cross-sectional views in other routing areas have the above-mentioned corresponding relationships, and will not be repeated here.
  • each of the signal line groups is respectively configured with a corresponding main body wiring area, and each of the signal line groups is located in the corresponding main body wiring area with the rest of the plurality of signal line groups.
  • the first direction has a first overlapping area
  • the remaining plurality of the routing regions respectively has a second overlapping area with the remaining signal line groups.
  • setting the overlapping area of each signal line group in the corresponding main body routing area as the first overlapping area can be achieved by adjusting the overlapping line widths in the first direction. If the line widths are both 10um, the line widths where the signal traces in the two signal line groups overlap in the first direction can be set to 2um, 4um, and so on.
  • the matching of coupling capacitances between each signal line group can be effectively improved, that is, the matching of each signal line group can be effectively improved.
  • the coupling capacitance between the two is similar, and the coupling capacitance can be set within the same preset range only by satisfying the above-mentioned overlapping area relationship, thereby reducing the design difficulty of the signal wiring.
  • the relative positional relationship in the cross-sectional view in the AA' direction in FIG. 5 is that the second signal line group 312 and the third signal line group 313 completely overlap in the first direction, and are in the first direction with the first signal line group 311
  • the relative positional relationship in the cross-sectional view in the BB' direction in FIG. 5 is that the first signal line group 310 and the third signal line group 313 completely overlap in the first direction, and the second signal line group 312 does not overlap upwards. There is no overlap in the first direction, that is, the relative positional relationship of the plurality of signal line groups 310 in each of the routing regions is not exactly the same.
  • the two signal traces are designed to completely overlap or not overlap, but in the actual product preparation process, it is not limited to 100% overlap or 0% overlap, for example, if two If the overlapping area of the signal traces in the first direction exceeds 99.5%, it can be considered as completely overlapping.
  • the mutual capacitance between different signal lines can be effectively adjusted.
  • the second signal line group 312 and the third signal line group 313 overlap in the first direction
  • the first signal line group 311 and the The third signal line group 313 overlaps in the first direction
  • the second signal line group 312 and the first signal line group 311 overlap in the first direction.
  • ⁇ represents the dielectric constant of the material between the two signal traces
  • S represents the relative area between the two signal traces, that is, the overlapping area of the two signal traces in the first direction
  • d represents the two signal traces. The distance between signal traces. Therefore, according to the above capacitance calculation formula, by changing the overlapping area and distance between different signal traces, each signal trace can have similar coupling capacitances, thereby effectively improving the vertical uniformity of the display screen.
  • the plurality of signal lines are divided into three signal line groups 310. In other embodiments, the plurality of signal lines can also be divided into two signal line groups 310 or more than four signal lines
  • the specific division method of the wire group 310 may be determined according to the number of the wiring layers 300 and/or the arrangement of the light-emitting elements.
  • FIG. 7 is a schematic diagram of an arrangement of light-emitting elements in an embodiment.
  • the arrangement of light-emitting elements in each of the pixel units 110 is the same, and the pixel unit 110 includes a plurality of different colors of the light-emitting elements.
  • Light-emitting elements, the light-emitting elements located at the same position in the plurality of pixel units 110 are connected to the same signal line group 310, and different signal line groups 310 are connected to the light-emitting elements of different colors, so as to pass
  • the driving signals received by the light emitting elements in each pixel unit 110 are similar, thereby improving the display uniformity.
  • each pixel unit 110 includes three light-emitting elements, and the colors of the three light-emitting elements may be different, such as red, green, and blue, respectively. All the red light-emitting elements correspond one-to-one with the plurality of first signal lines 3111 All green light-emitting elements are connected to a plurality of second signal wires 3121 in a one-to-one correspondence, all blue light-emitting elements are connected to a plurality of third signal wires 3131 in a one-to-one correspondence, and the total of the first signal wires 3111 The number, the total number of the second signal traces 3121 and the total number of the third signal traces 3131 are the same.
  • FIG. 8 is the second schematic diagram of the arrangement of light-emitting elements according to an embodiment.
  • each pixel unit 110 also includes three light-emitting elements, and the colors of the three light-emitting elements may be different, such as red, green and blue.
  • the arrangement of the light-emitting elements in each pixel unit 110 is the same, the arrangement directions of different pixel units 110 are not exactly the same. Therefore, for the light-emitting elements of this embodiment, it is defined that different light-emitting elements are rotated and overlapped. Then, the light-emitting elements located at the same position are connected to the same signal line group 310 .
  • FIG. 9 is the third schematic diagram of the arrangement of light-emitting elements according to an embodiment.
  • each pixel unit 110 includes four light-emitting elements, and some light-emitting elements may have the same color, for example, including one red light-emitting element and one green light-emitting element. light-emitting element and two blue light-emitting elements to achieve a better light-emitting color gamut.
  • the plurality of signal wires can be divided into four signal wire groups 310 , all red light-emitting elements are connected to the plurality of first signal wires 3111 in one-to-one correspondence, and all green light-emitting elements are connected to the plurality of second signal wires one-to-one.
  • the signal traces 3121 are connected, one blue light-emitting element in each pixel unit 110 is connected to the plurality of third signal traces 3131 in a one-to-one correspondence, and another blue light-emitting element in each pixel unit 110 is in a one-to-one correspondence with the plurality of third signal traces.
  • Four signal traces 3141 are connected.
  • the colors of the four light-emitting elements may also be different, for example, red, green, blue, and white, respectively.
  • the connection relationship between each light-emitting element and the signal wiring may refer to the foregoing description, which is not repeated here. Repeat.
  • each of the signal line groups 310 is respectively configured with a corresponding main body wiring area, and each wiring area is correspondingly configured as a main body wiring area of at most one signal line group 310 .
  • Each of the signal line groups 310 is completely non-overlapping in the first direction with the remaining plurality of the signal line groups 310 in the corresponding main body routing area, and the remaining plurality of the routing lines do not overlap at all in the first direction.
  • the regions are completely overlapped with the remaining at least two signal line groups 310 in a one-to-one correspondence.
  • the plurality of signal line groups 310 include a first signal line group 311 , a second signal line group 312 and a third signal line group 313
  • the wiring layer 300 includes The first wiring area 321 , the second wiring area 322 and the third wiring area 323 ; wherein, the first signal line group 311 and the second signal line group 312 are described in the third wiring area 323 both completely overlap in the first direction, the second signal line group 312 and the third signal line group 313 completely overlap in the first direction in the first routing area 321, and the third signal line group 313 completely overlaps in the first direction.
  • the line group 313 and the first signal line group 311 completely overlap in the first direction in the second wiring region 322 .
  • each pixel unit 110 usually includes three light-emitting elements, and when three wiring layers 300 are provided, the difficulty of manufacturing the circuit is relatively low, and by dividing the wiring layer 300 into three It is easier to adjust the coupling capacitance between each signal trace in a single trace area. Moreover, compared with the case of partial overlap, the calculation logic of the coupling capacitance in the case of complete overlap and complete non-overlap is also simpler, thus providing a A display screen with low design difficulty and similar coupling capacitance.
  • FIG. 10 is the third cross-sectional view of the wiring layer 300 in an embodiment.
  • each wiring layer 300 has a corresponding signal line group 310 formed therein, and the wiring layer 300 is divided into four wiring areas.
  • the main wiring area corresponding to the first signal line group 311 is the first wiring area 321
  • the main wiring area corresponding to the second signal line group 312 is the second wiring area 322
  • the third signal line group 313 corresponds to the main wiring area 322 .
  • the main wiring area is the third wiring area 323
  • the main wiring area corresponding to the fourth signal line group 310 is the fourth wiring area.
  • each signal line group 310 does not overlap with other signal line groups 310 in the corresponding main body routing area.
  • the first signal line group 311 completely overlaps with the fourth signal line group 310 in the third routing region 323 , and completely overlaps with the second signal line group 312 in the fourth routing region.
  • the second signal line group 312 completely overlaps with the third signal line group 313 in the first routing region 321 and completely overlaps with the first signal line group 311 in the fourth routing region.
  • the third signal line group 313 completely overlaps with the second signal line group 312 in the first routing region 321 , and completely overlaps with the fourth signal line group 310 in the second routing region 322 .
  • the fourth signal line group 310 completely overlaps with the first signal line group 311 in the third routing region 323 , and completely overlaps with the third signal line group 313 in the second routing region 322 .
  • FIG. 11 is a fourth cross-sectional view of a wiring layer 300 according to an embodiment.
  • four wiring layers 300 are included, and a signal line group 310 is correspondingly formed in each wiring layer 300 .
  • the wiring layer 300 is divided into four wiring areas.
  • the main wiring area corresponding to the first signal line group 311 is the first wiring area 321
  • the main wiring area corresponding to the second signal line group 312 is the second wiring area 322
  • the third signal line group 313 corresponds to the main wiring area 322 .
  • the main wiring area is the third wiring area 323
  • the main wiring area corresponding to the fourth signal line group 310 is the fourth wiring area.
  • each signal line group 310 does not overlap with other signal line groups 310 in the corresponding main body routing area.
  • the first signal line group 311 completely overlaps with the third signal line group 313 in the second routing region 322, completely overlaps with the fourth signal line group 310 in the third routing region 323, and overlaps with the second signal line group 310 in the fourth routing region 323.
  • the signal line groups 312 completely overlap.
  • the second signal line group 312 completely overlaps with the first signal line group 311 in the fourth routing area, completely overlaps with the third signal line group 313 in the fifth routing area, and overlaps with the fourth signal line in the sixth routing area Groups 310 completely overlap.
  • the third signal line group 313 completely overlaps with the fourth signal line group 310 in the first routing area 321, completely overlaps with the first signal line group 311 in the second routing area 322, and overlaps with the second signal line group 311 in the fifth routing area 322.
  • the signal line groups 312 completely overlap. Comparing FIG. 10 and FIG. 11 , it can be seen that the division method of the wiring area in this embodiment is more complicated, but each signal line group 310 is in the remaining wiring area except the corresponding main wiring area.
  • the groups 310 are in a one-to-one correspondence and completely overlap in the first direction. It can be understood that, based on a more complex wiring area division method, the similarity of the coupling capacitances between the different signal line groups 310 can be further improved, so that the Effectively improve the uniformity of the display.
  • FIG. 12 is a fifth cross-sectional view of the wiring layer 300 according to an embodiment.
  • each of the signal line groups 310 has a corresponding ground line spacing, and the ground line spacing is where the signal line group 310 is located.
  • the distance between the trace layer 300 and the ground trace 400 for example, the distance between the ground traces of the first trace layer 300 is Dgnd1 in FIG. 12 , the distance between the ground traces of the second trace layer 300 is Dgnd2 in FIG. 12 , The ground distance of the third wiring layer 300 is Dgnd3 in FIG. 12 .
  • the size of the main body wiring area in the extension direction of the signal wiring is defined as the length of the main body wiring area; wherein, the length of the main body wiring area corresponding to each of the signal line groups 310 is positive with the distance between the ground wires related.
  • the larger the overlapping area S and the smaller the distance d the larger the capacitance value.
  • the overlapping area is directly related to the length and width of the overlapping pattern.
  • the width of the overlapping graphics is determined by the diameter of the signal trace
  • the length of the overlapping graphics is determined by the length of the signal trace.
  • the overlapping area between the signal wiring and the ground wiring 400 in each wiring area can be changed, so as to adjust the difference between the signal wiring and the ground wiring 400 .
  • the capacitance value of the self-capacitance formed between them can make the self-capacitance of each signal line similar, thereby improving the difference in coupling capacitance between different signal lines and improving the uniformity of the display screen.
  • FIG. 13 is a sixth cross-sectional view of the wiring layer 300 according to an embodiment.
  • the diameters of different signal wirings are different, so that different self-capacitances can be formed with the ground wirings 400 , so as to The self-capacitance difference caused by the distance difference with the ground trace 400 is improved, thereby improving the uniformity of the display screen.
  • the specific implementation principle is similar to that of the previous embodiment, and details are not repeated here.
  • FIG. 14 is a seventh cross-sectional view of the wiring layer 300 according to an embodiment.
  • each signal wiring in the plurality of the signal wiring groups 310 is parallel to each other, and any one of the signal wirings is parallel to each other.
  • the line groups 310 are respectively partially overlapped with the remaining at least two signal line groups 310 in the first direction, and the overlapping area of the two overlapping signal line groups 310 in the first direction is the same as that of the two signal line groups 310 .
  • the distances of the wire groups 310 in the first direction are positively correlated, so as to improve the mutual capacitance difference caused by the distance difference of the signal traces.
  • any one of the middle wiring layers 302 respectively partially overlaps with the two adjacent wiring layers 300 in the first direction, and overlaps with the other wiring layers 300 in the first direction. Do not overlap upwards; the bottom wiring layer 301 and the adjacent one of the middle wiring layer 302 and the top wiring layer 303 respectively partially overlap in the first direction, and overlap with the other wiring layers The layers 300 do not overlap in the first direction; the top routing layer 303 and the adjacent one of the middle routing layer 302 and the bottom routing layer 301 respectively partially overlap in the first direction , and does not overlap with other wiring layers 300 in the first direction.
  • FIG. 14 provides an embodiment including three wiring layers 300 .
  • the cross-sectional view of the signal wiring at any position is the same, and the first signal wiring in the bottom wiring layer 301 is the same.
  • the line 3111 and the second signal line 3121 and the third signal line 3131 are respectively partially overlapped in the first direction.
  • the three signal traces 3131 partially overlap in the first direction, and the third signal traces 3131 in the top trace layer 303 are respectively in the first direction with the first signal traces 3111 and the second signal traces 3121 Partially overlapping.
  • the signal traces in the middle trace layer 302 and the signal traces in the adjacent trace layer 300 have a first overlapping area in the first direction
  • the top trace layer 303 and all the signal traces have a first overlapping area in the first direction
  • the bottom wiring layer 301 has a second overlapping area in the first direction, a predetermined ratio between the second overlapping area and the first overlapping area, and the predetermined ratio and the display screen
  • the number of the middle wiring layers 300 is positively correlated.
  • 15 is a schematic diagram of an overlapping area of an embodiment, including a cross-sectional view and a top view of the wiring layer 300.
  • the second signal trace 3121 and the third signal trace 3131 have a first overlapping area in the first direction S2-3, the first signal trace 3111 and the third signal trace 3131 have a second overlapping area S1-2 in the first direction.
  • the number of layers of the trace layers 300 N is 3 layers
  • the preset ratio k is the ratio between the second overlapping area S1-2 and the first overlapping area S2-3.
  • the number of wiring layers 300 is proportional to the number of wiring layers 300 . Further, the preset ratio may be equal to the number of wiring layers 300 in the display screen.
  • FIG. 16 is an eighth cross-sectional view of a wiring layer 300 according to an embodiment.
  • the display screen includes four wiring layers 300 , and the arrangement of the wiring layers 300 in this embodiment is the same as that in FIG. 14 .
  • the embodiments are similar, except that each signal line group 310 partially overlaps with the remaining signal line groups 310 in the first direction, thereby further narrowing the occupied area of the signal lines in a plane parallel to the display surface. It should be noted that this embodiment is only used for exemplary illustration, and is not used to limit the protection scope of the present application. In other embodiments, each signal line group 310 overlaps with the remaining signal line groups 310 in the first direction. The area can be set according to actual needs.
  • the wiring layer 300 includes a plurality of wiring regions, and the plurality of wiring regions are adjacent in a plane perpendicular to the first direction; wherein, at least one of the signal lines Groups 310 are located on different wiring layers 300 in different wiring regions.
  • 17 is a ninth cross-sectional view of the wiring layer 300 according to an embodiment.
  • the distance between the two signal line groups 310 remains unchanged. Therefore, the first signal wiring 3111 and the second signal wiring are The mutual capacitance between 3121 is equal.
  • the similarity of the self-capacitance between different signal traces and the ground trace 400 can be improved. Therefore, the coupling capacitances of different signal lines are similar, and the display uniformity of the display screen is improved.
  • FIG. 18 is an equivalent circuit diagram of a display screen according to an embodiment.
  • each signal trace has a self-capacitance Cd and a mutual capacitance Cx with other signal traces.
  • the display screen A power supply trace 500 (not shown) may also be included, the power trace 500 and at least part of the signal traces partially overlap in the first direction, so as to be formed between the overlapping signal traces Compensation capacitor Cc, wherein the coupling capacitor further includes the compensation capacitor.
  • the signal lines can have similar mutual capacitances, that is, Cx1-2 ⁇ Cx2-3 ⁇ Cx3-4 ⁇ Cx4-5 ⁇ Cx5-6, and by adding additional compensation capacitors, Cc1 ⁇ Cc2 ⁇ Cc3 ⁇ Cc4 ⁇ Cc5 ⁇ Cc6, and the
  • the self-capacitance can also be adjusted by changing the positional relationship with the ground trace 400, so that Cd1 ⁇ Cd2 ⁇ Cd3 ⁇ Cd4 ⁇ Cd5 ⁇ Cd6.
  • the coupling capacitances between the multiple signal traces are similar, that is, C1 ⁇ C2 ⁇ C3 ⁇ C4 ⁇ C5 ⁇ C6, so as to obtain a display screen with better uniformity.
  • the structure of the driving unit 210 is relatively simple.
  • the present application also provides a circuit diagram of the driving unit 210 , and FIG. 19 shows the driving unit of an embodiment.
  • the circuit diagram of the unit 210, a driving unit 210 and its corresponding light-emitting element LED are provided in FIG. 19, referring to FIG. 19, in this embodiment, the driving unit 210 includes a plurality of transistors and at least one storage capacitor, the embodiment of FIG. 19 provides A 7T1C implementation has been described. It can be understood that, in other embodiments, the driving unit 210 may also be a 3T1C, a 6T1C, or the like, and the above driving unit 210 can also achieve the purpose of the present application.
  • the driving unit 210 includes a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a fifth transistor T5, a sixth transistor T6, a seventh transistor T7 and a storage capacitor.
  • the gate of the first transistor T1 is connected to the drain of the fifth transistor T5, the source of the first transistor T1 is connected to the drain of the third transistor T3, and the drain of the first transistor T1 is connected to the drain of the sixth transistor T6
  • the source, the gate of the second transistor T2 is connected to the scanning signal line, the source of the second transistor T2 is connected to the gate of the first transistor T1, the gate of the third transistor T3 is connected to the light-emitting control signal line, and the third transistor
  • the source of T3 is connected to the power supply voltage ELVDD, the gate of the fourth transistor T4 is connected to the scan signal line, the source of the fourth transistor T4 is connected to the source of the first transistor T1, and the drain of the fourth transistor T4 is connected to the data Signal line, the source of the fifth
  • the first anode of the light-emitting element is connected to the drain of the control transistor TFT1, and the first cathode 120 of the light-emitting element is connected to the ground voltage ELVSS.
  • the driving unit 210 may execute a driving mode or a measurement mode, wherein the driving mode includes a first stage and a second stage, the measurement mode includes a device measurement mode and a pixel measurement mode, and the device measurement mode includes a third stage and a fourth stage.
  • the light-emitting element emits light according to the data signal and the control signal.
  • the first stage of the driving mode includes: switching the second transistor T2 to its on state to turn on the drain and gate of the first transistor T1 to turn on the source of the first transistor T1 through the fourth transistor T4T4 pole and data signal lines.
  • the second stage of the driving mode includes turning on the source of the first transistor T1 and the power supply voltage ELVDD through the third transistor T3, and turning off the first gate and drain of the first transistor T1.
  • the light-emitting element is electrically connected to the power supply voltage ELVDD through the first transistor T1, thereby causing a current to flow to the light-emitting element according to the voltage Vdata of the data signal line.
  • the current flowing to the light-emitting element can be measured to determine the associated degradation of device characteristics.
  • the third stage of the device measurement mode includes: turning on the gate of the first transistor T1 and the reference voltage line to switch the first transistor T1 to the triode mode.
  • the fourth stage of the device measurement mode includes: turning on the source of the first transistor T1 and the data signal line so that current flows between the data signal line and the light-emitting element; turning on the drain of the first transistor T1 through the sixth transistor T6
  • the electrode and the light-emitting element are connected to the data signal line and the light-emitting element, so that a known bias voltage is supplied to the light-emitting unit through the data signal line, thereby measuring the current generated in response to the voltage.
  • the first transistor T1 In the fourth phase of the device measurement mode, the first transistor T1 remains in triode mode so that the source-drain current is approximately proportional to the source-drain voltage. Also, in the triode mode, the resistance value between the source and drain of the first transistor T1 is small, so that the voltage drop between the data signal line and the first anode of the light emitting element can be ignored or corrected.
  • the drive transistor can be programmed with a known data voltage Vdata to measure the current in the pixel while in the analog drive mode.
  • the pixel measurement mode includes a programming phase similar to the aforementioned first phase of the drive mode, and a current measurement phase similar to the aforementioned fourth phase of the device measurement mode.
  • the programming stage of the pixel measurement mode includes: turning on the second transistor T2 to turn on the drain and gate of the first transistor T1, and turning on the source of the first transistor T1 and the data signal through the third transistor T3 The line is thus used to charge the first gate of the first transistor T1 to pre-compensate for the influence of the threshold voltage Vth on the source-drain current of the first transistor T1 in the current measurement phase.
  • the current measurement stage includes: turning on the source of the first transistor T1 and the data signal line to enable current to flow between the data signal line and the light-emitting element through the first transistor T1, and turning on the first transistor T1 through the sixth transistor T6 of the drain and light-emitting element to measure.
  • an embodiment of the present application further provides a display device, including: a photosensitive element 20 ; the above-mentioned display screen; ambient light can be incident on the photosensitive element 20 through the first region 11 . .
  • the display device of this embodiment has better display uniformity. It is understandable that the specific implementation can refer to the aforementioned display screen embodiments, which will not be repeated here.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

Écran d'affichage, comprenant une première zone (11) et une seconde zone (12) reliée à la première zone (11). L'écran d'affichage comprend : un ensemble électroluminescent (100), qui est disposé dans la première zone (11), la lumière ambiante pouvant être incidente sur un élément photosensible (20) à travers la première zone (11) ; un ensemble d'entraînement (200) qui est disposé dans la seconde zone (12), l'ensemble d'entraînement (200) étant utilisé pour entraîner l'ensemble électroluminescent (100) pour émettre de la lumière ; et une pluralité de couches de câblage, qui sont disposées de manière empilée dans une première direction, la première direction étant parallèle à la direction d'épaisseur de l'écran d'affichage, une pluralité de fils de signal étant formés dans les couches de câblage, la pluralité de fils de signal étant utilisés pour connecter l'ensemble électroluminescent (100) et l'ensemble d'entraînement (200), la capacité de couplage de tous les fils de signal étant réglée dans la même plage prédéfinie, et la capacité de couplage comprenant une capacité mutuelle et une capacité propre.
PCT/CN2021/131441 2021-01-18 2021-11-18 Écran d'affichage et dispositif d'affichage WO2022151834A1 (fr)

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CN112909051B (zh) * 2021-01-18 2023-07-14 Oppo广东移动通信有限公司 显示屏和显示设备
WO2023159598A1 (fr) * 2022-02-28 2023-08-31 京东方科技集团股份有限公司 Substrat d'affichage et appareil d'affichage
CN115497415A (zh) * 2022-06-28 2022-12-20 厦门天马微电子有限公司 一种显示模组及其亮度调节方法、显示装置

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CN104699349A (zh) * 2015-04-01 2015-06-10 上海天马微电子有限公司 一种阵列基板及其制作方法、显示面板
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