WO2022170646A1 - 显示装置 - Google Patents

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Publication number
WO2022170646A1
WO2022170646A1 PCT/CN2021/078148 CN2021078148W WO2022170646A1 WO 2022170646 A1 WO2022170646 A1 WO 2022170646A1 CN 2021078148 W CN2021078148 W CN 2021078148W WO 2022170646 A1 WO2022170646 A1 WO 2022170646A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit board
power signal
printed circuit
display device
signal trace
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2021/078148
Other languages
English (en)
French (fr)
Inventor
张朝科
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
Original Assignee
TCL China Star Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TCL China Star Optoelectronics Technology Co Ltd filed Critical TCL China Star Optoelectronics Technology Co Ltd
Priority to US17/289,770 priority Critical patent/US12387656B2/en
Publication of WO2022170646A1 publication Critical patent/WO2022170646A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0296—Conductive pattern lay-out details not covered by sub groups H05K1/02 - H05K1/0295
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/0426—Layout of electrodes and connections
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09209—Shape and layout details of conductors
    • H05K2201/09654—Shape and layout details of conductors covering at least two types of conductors provided for in H05K2201/09218 - H05K2201/095
    • H05K2201/09727—Varying width along a single conductor; Conductors or pads having different widths
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10106—Light emitting diode [LED]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10128—Display
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W90/00—Package configurations

Definitions

  • the present application relates to the field of display technology, and in particular, to a display device.
  • OLED Organic Light Emitting Display
  • Mini-LEDs sub-millimeter light-emitting diodes
  • Micro-LEDs micro-light-emitting diodes
  • FIG. 1 shows a schematic structural diagram of a display device.
  • FIG. 2 shows a schematic diagram of an equivalent circuit of pixel driving in a display device. Referring to FIG. 1 , in the display device, a plurality of pixel units 111 arranged in a matrix form are arranged in the display area.
  • the pixel unit 111 there are mainly two ways to drive the pixel unit 111 , 2T1C and 1T1MOS, but not limited thereto.
  • An embodiment of the present application provides a display device, in which the position of the power access terminal on the side of the printed circuit board is changed from the position of the power access terminal on the side close to the printed circuit board to the position of the power access terminal on the side far from the printed circuit board by inverting the position of the power access terminal of the power signal wiring.
  • the difference between the terminal voltages of the light-emitting devices (including, for example, organic light-emitting diodes) in two adjacent rows in the direction from close to the printed circuit board to away from the printed circuit board is smaller than the target difference, and the current difference is correspondingly smaller,
  • the luminance difference of the light emitting devices in each row is reduced to a level that cannot be easily recognized by human eyes, thereby improving the display image quality of the display device.
  • the present application provides a display device, the display device includes: a display substrate, on which a plurality of light-emitting devices arranged in an array are arranged; a printed circuit board, arranged on one of the display substrates side; the first power signal wiring and the second power signal wiring are both used to provide power signals to the plurality of light-emitting devices; wherein, when the first power supply access end of the first power signal wiring is set at the On the side close to the printed circuit board, when the second power access end of the second power signal trace is disposed on the side away from the printed circuit board, along the phase in the direction from approaching the printed circuit board to the direction away from the printed circuit board.
  • the difference between the terminal voltages of the light-emitting devices in two adjacent rows is smaller than the target difference, so that the brightness of the light-emitting devices in each row of the display substrate is basically unchanged;
  • the width of a power signal trace is larger than the width of the first power signal trace close to the printed circuit board; the width of the second power signal trace away from the printed circuit board is larger than that close to the printed circuit board The width of the second power signal trace.
  • the first power signal trace extends from a side close to the printed circuit board to a side away from the printed circuit board; the second power signal trace extends from a side away from the printed circuit board One side of the printed circuit board extends toward the side close to the printed circuit board.
  • the first power signal trace has a patterned structure.
  • the second power signal trace has a patterned structure.
  • the first power signal trace on a side close to the printed circuit board includes a plurality of first hollows; the first power supply on a side away from the printed circuit board
  • the signal wiring includes a plurality of second hollows; the number of the first hollows is greater than the number of the second hollows.
  • the second power supply signal trace on the side close to the printed circuit board includes a plurality of third hollows; the second power supply on the side away from the printed circuit board
  • the signal wiring includes a plurality of fourth hollow parts; the number of the third hollow parts is greater than the number of the fourth hollow parts.
  • the first power signal trace or the second power signal trace is disposed on different layers of the display substrate.
  • the materials of the first power signal trace and the second power signal trace are the same.
  • the voltage value of the terminal voltage of the light emitting devices in each row of the display substrate is constant.
  • the present application provides a display device, the display device comprising: a display substrate, on which a plurality of light-emitting devices are arranged in an array; a printed circuit board, arranged on the display substrate one side of the substrate; the first power signal wiring and the second power signal wiring are both used to provide power signals to the plurality of light-emitting devices; wherein, when the first power supply of the first power signal wiring is connected The end is disposed on the side close to the printed circuit board, and the second power access end of the second power signal trace is disposed on the side away from the printed circuit board, along the direction of approaching the printed circuit board to being away from the printed circuit board
  • the difference between the terminal voltages of the light-emitting devices in two adjacent rows on the display substrate is smaller than the target difference, so that the brightness of the light-emitting devices in each row of the display substrate is substantially unchanged.
  • the first power signal trace extends from a side close to the printed circuit board to a side away from the printed circuit board; the second power signal trace extends from a side away from the printed circuit board One side of the printed circuit board extends toward the side close to the printed circuit board.
  • the width of the first power signal trace away from the printed circuit board is greater than the width of the first power signal trace close to the printed circuit board.
  • the width of the second power signal trace away from the printed circuit board is greater than the width of the second power signal trace close to the printed circuit board.
  • the first power signal trace has a patterned structure.
  • the second power signal trace has a patterned structure.
  • the first power signal trace on a side close to the printed circuit board includes a plurality of first hollows; the first power supply on a side away from the printed circuit board
  • the signal wiring includes a plurality of second hollows; the number of the first hollows is greater than the number of the second hollows.
  • the second power supply signal trace on the side close to the printed circuit board includes a plurality of third hollows; the second power supply on the side away from the printed circuit board
  • the signal wiring includes a plurality of fourth hollow parts; the number of the third hollow parts is greater than the number of the fourth hollow parts.
  • the first power signal trace or the second power signal trace is disposed on different layers of the display substrate.
  • the materials of the first power signal trace and the second power signal trace are the same.
  • the voltage value of the terminal voltage of the light emitting devices in each row of the display substrate is constant.
  • the position of the power access terminal on the side of the printed circuit board is changed from the position of the power access terminal on the side close to the printed circuit board to the power access terminal on the side away from the printed circuit board by inverting the position of the power access terminal of the power signal trace.
  • the position of the terminals makes the difference between the terminal voltages of the light-emitting devices (including, for example, organic light-emitting diodes) in two adjacent rows in the direction from close to the printed circuit board to away from the printed circuit board is smaller than the target difference, and the current difference is correspondingly smaller. , so that the luminance difference of the light-emitting devices in each row is reduced to a level that cannot be easily recognized by human eyes, thereby optimizing the current driving structure of the display device and improving the display quality of the display device.
  • FIG. 1 is a schematic structural diagram of a display device in the prior art.
  • FIG. 2 is an equivalent circuit diagram of pixel driving of the display device shown in FIG. 1 .
  • FIG. 3 is a schematic structural diagram of a display device in an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a display device in another embodiment of the present application.
  • FIG. 5 is a schematic diagram of a patterned structure of the first power signal trace shown in FIG. 4 .
  • FIG. 6 is a schematic structural diagram of a display device in another embodiment of the present application.
  • FIG. 7 is a schematic diagram of a patterned structure of the second power signal wiring shown in FIG. 6 .
  • the terms “installed”, “connected” and “connected” should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection, electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction of two elements relation.
  • installed should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection, electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction of two elements relation.
  • FIG. 3 is a schematic structural diagram of a display device in an embodiment of the present application.
  • a display device includes: a display substrate 210 on which a plurality of pixel circuits 211 (corresponding to pixel units) and a plurality of light-emitting devices (refer to 150 shown in FIG.
  • the terminal voltage of the light emitting device 150 is the first voltage of the first power signal traces 230 located in each row of the display substrate 210 and the second voltage of the second power signal traces 240 located in each row of the display substrate 210 .
  • the difference between the terminal voltages of the light-emitting devices in the adjacent two rows along the direction from the printed circuit board to the direction away from the printed circuit board is smaller than the target difference, so that the The brightness of the light emitting devices in each row of the display substrate is substantially unchanged.
  • the display substrate 210 includes a base substrate (not marked in the figure) and a plurality of film layers on the base substrate.
  • the structure of the base substrate and the plurality of film layers may be well known to those skilled in the art, and will not be described in detail here.
  • the base substrate may include a display area (array area, AA area for short) (not marked in the figure).
  • the display area includes a plurality of pixel units (corresponding to the pixel circuit indicated by the reference numeral 211 in FIG. 3 ), and each pixel unit may include a plurality of sub-pixels.
  • Each sub-pixel includes a light-emitting device and a pixel circuit 211 electrically connected to the light-emitting device.
  • the pixel circuit 211 is used to drive the light-emitting device to emit light.
  • the pixel circuit 211 may include a current control circuit and a length control circuit.
  • the pixel circuit 211 is a current control circuit.
  • the current control circuit may be a 2T1C control circuit or a 1T1MOS control circuit. In this embodiment, a 1T1MOS control circuit is used.
  • the structure and working principle of the pixel circuit 211 may be basically the same as those in the related art, which should be understood by those of ordinary skill in the art.
  • the display device further includes a printed circuit board 220 .
  • the printed circuit board 220 (Printed Circuit Board, PCB for short) may be a flexible printed circuit board, which is a high-precision flexible printed circuit board, and the printed circuit board 220 is disposed on one side of the display substrate 210 .
  • the printed circuit board 220 is disposed on top of the display substrate 210 .
  • the printed circuit board 220 can be used to electrically connect the display panel of the display device and the mainboard circuit of the display device, so as to realize signal transmission between the display panel and the mainboard circuit.
  • the flexible printed circuit board can be bound to the bending area of the base substrate, so as to prevent the flexible printed circuit board from occupying the frame area of the display device, reduce the frame width of the display device, and thus increase the screen ratio of the display device.
  • the printed circuit board 220 is used for providing electrical signals to the display substrate 210 .
  • the printed circuit board 220 may use the power signal wirings disposed on the display substrate 210 through a plurality of connection terminals 260 to provide the power signal to the display substrate 210 .
  • the connection terminals 260 and the printed circuit board 220 are disposed on the same side of the display substrate 210 .
  • the power signal traces include a first power signal trace 230 and a second power signal trace 240 .
  • the traces that appear below refer to the power signal traces.
  • the first power signal trace 230 is used to provide a first voltage
  • the second power signal trace 240 is used to provide a second voltage, wherein the first voltage may be the operating voltage VDD or the common voltage VSS required for driving the light-emitting device to emit light .
  • the second voltage may be the operating voltage VDD or the common voltage VSS corresponding to the first voltage required for driving the light emitting device to emit light.
  • the first voltage is the working voltage VDD and the second voltage is the common voltage VSS, or the first voltage is the common voltage VSS and the second voltage is the working voltage VDD.
  • taking the first voltage as the working voltage VDD and the second voltage as the common voltage VSS as an example that is, the first power signal trace 230 provides the working voltage VDD
  • the second power signal trace 240 provides the common voltage VSS
  • the above settings are only examples, and are not intended to limit the present application. It should be noted that, generally, the working voltage VDD is a high voltage, and the common voltage VSS is a low voltage.
  • the first power access terminal A of the first power signal trace 230 is disposed on the side close to the printed circuit board 220
  • the second power access terminal B of the second power signal trace 240 It is arranged on the side away from the printed circuit board 220 .
  • the printed circuit board 220 is connected to the first power access terminal A through the connection terminal 260 .
  • the printed circuit board 220 is connected to the second power access terminal B through the connection terminal 260 and the auxiliary wiring 270 .
  • the auxiliary wiring 270 can be arranged along the frame direction of the display device, one end of which is connected to the connection terminal 260, and the other end is connected to the second power access terminal B.
  • connection terminal 260 is located on the side close to the printed circuit board 220, and the second The power access terminal B is located on the side away from the printed circuit board 220 , for example, the second power access terminal B is disposed at the end of the display device opposite to the printed circuit board 220 side.
  • connection method of the auxiliary wiring to the connection terminal and the second power supply access terminal is not limited to this, and the above connection method is only an example, and is not intended to limit the present application.
  • the first power access terminal A of the first power signal trace and the second power access terminal B of the second power signal trace are simultaneously disposed near the connection terminals of the printed circuit board. That is, a common cathode connection method or a common anode connection method is adopted.
  • the disadvantage of adopting this connection method is that the VDD voltage value of each row on the display substrate gradually decreases along the direction from the side close to the printed circuit board to the side away from the printed circuit board, while the VDD voltage value of each row on the display substrate gradually decreases.
  • the brightness from the side of the circuit board to the side far from the printed circuit board shows a decrease (due to the large decrease in the terminal voltage of the light-emitting device in the adjacent two rows, the decrease in the brightness difference of the light-emitting device is correspondingly large. ), so that the brightness difference between the light-emitting devices in each row may be too large, so the human eye will perceive obvious uneven brightness and darkness, which will affect the display quality.
  • the first power access terminal A of the first power signal trace 230 is set on the side close to the printed circuit board 220, and the second power connection of the second power signal trace 240 is connected to The input end B is disposed on the side away from the printed circuit board 220 .
  • the operating voltage VDD in the direction from the side close to the printed circuit board 220 to the side away from the printed circuit board 220 can be gradually reduced, and at the same time, the common voltage VSS can also be gradually reduced.
  • the display substrate 210 is divided into several rows and several columns, and each row and each column form a corresponding pixel unit.
  • the row closest to the side of the printed circuit board 220 is the first row
  • the row farthest from the side of the printed circuit board 220 is the last row.
  • the difference between the currents corresponding to the currents is also reduced accordingly, so that the brightness of the light-emitting devices in each row is basically unchanged, so that the brightness difference cannot be easily recognized by the human eye, and the uneven display of the display screen can be improved.
  • the light emitting part of the light emitting device may include: an electroluminescent layer 251 , see FIG. 2 .
  • the material of the electroluminescent layer 251 may include electroluminescent materials, such as organic electroluminescent materials and inorganic electroluminescent materials, which are not limited herein.
  • the light emitting part of the light emitting device may also include LED (Light Emitting Diode, light-emitting diode) chip 252, see FIG. 2 .
  • the size of the LED chip 252 may be in the order of microns.
  • Micro Light Emitting Diode Micro LED has the advantages of high brightness, high luminous efficiency, and low power consumption.
  • the micron-scale LED chips 252 may be configured as Micro LED chips.
  • the size of the Micro LED chip may also be nanoscale.
  • mini light-emitting diodes (Mini Light Emitting Diode, Mini LED) has a smaller size and can achieve a high-resolution display.
  • the organic light emitting diode (Organic Light Emitting Diode) is fabricated on a base substrate (eg, a glass-based substrate). Light Emitting Diode, OLED) and a pixel circuit that drives the OLED to emit light to form an OLED panel.
  • the first power signal traces 230 extend from a side close to the printed circuit board 220 to a side away from the printed circuit board 220 .
  • the second power signal traces 240 extend from a side away from the printed circuit board 220 to a side close to the printed circuit board 220 .
  • the first power signal traces 230 may extend from a side close to the printed circuit board 220 to a side away from the printed circuit board 220 , and the arrangement direction of the first power signal traces 230 is vertical in the horizontal axis direction of the display device (the horizontal axis direction is parallel to the arrangement direction of the printed circuit board 220 ).
  • the first power signal traces 230 may extend along a side close to the printed circuit board 220 toward a side away from the printed circuit board 220, and the first power signal traces The setting direction of 230 forms an angle less than 90 degrees with the horizontal axis direction of the display device.
  • the second power signal traces 240 may extend along the side away from the printed circuit board 220 toward the side close to the printed circuit board 220, and the arrangement direction of the second power signal traces 240 is perpendicular to The horizontal axis direction of the display device (the horizontal axis direction is parallel to the arrangement direction of the printed circuit board 220 ).
  • the second power signal traces 240 may extend from a side away from the printed circuit board 220 toward a side close to the printed circuit board 220 , and the second power signal traces
  • the setting direction of 240 forms an angle less than 90 degrees with the horizontal axis direction of the display device.
  • the width of the first power signal trace 230 away from the printed circuit board 220 is greater than the width of the first power signal trace 230 close to the printed circuit board 220 .
  • the cross-sectional areas of the first power signal traces 230 and the second power signal traces 240 are related to the trace widths of the first power signal traces 230 and the second power signal traces 240 .
  • the cross-sectional area of the trace is equal to the trace width multiplied by the trace thickness, the trace width is the width in the first direction D1 as shown in Figures 4 and 5, and the trace thickness is as shown in Figures 4 and 5 The thickness in the direction perpendicular to the first direction D1 and the second direction D2.
  • the cross-sectional area of the trace changes accordingly when the thickness of the trace is constant.
  • the resistance of the first power signal trace 230 is related to the trace resistivity, trace length and trace cross-sectional area, when the trace resistivity and trace length are constant, changing the trace cross-sectional area will also respond accordingly.
  • Ground changes the resistance of the first power signal trace 230 . Therefore, the resistance of the first power signal trace 230 located far from the printed circuit board 220 can be relatively small, while the resistance of the first power signal trace 230 located close to the printed circuit board 220 is relatively large, that is, the resistance of the first power signal trace 230 located far from the printed circuit board 220 is relatively large.
  • the resistance of the first power signal trace 230 of the board 220 is smaller than the first predetermined resistance value, and the resistance of the first power signal trace 230 located near the printed circuit board 220 is greater than the second predetermined resistance value.
  • the width of the second power signal trace 240 away from the printed circuit board 220 may also be set to be greater than the width of the second power signal trace 240 close to the printed circuit board 220 .
  • the first power signal trace 230 may have a pattern structure.
  • the first power signal trace 230 on the side close to the printed circuit board 220 includes a plurality of first hollows; the first power signal trace 230 on the side away from the printed circuit board 220 includes a plurality of second hollows; the number of the first hollows is greater than the number of the second hollows.
  • the first power signal traces 230 located in the first row are patterned to form traces with several solid parts 231 and several hollow parts 232 arranged at intervals.
  • the orthographic projection of this part of the traces on the display substrate 210 includes a plurality of first rectangles and a plurality of second rectangles, the first rectangles correspond to the solid portion 231, and the second rectangles correspond to the hollow portions 232.
  • the first power signal traces 230 located in the second row are patterned to form traces with a plurality of solid portions 231 and a plurality of hollow portions 232 arranged at intervals.
  • the orthographic projection of this part of the traces on the display substrate 210 as shown in FIG.
  • the first rectangles correspond to the solid portion 231
  • the second rectangles correspond to the hollow portions 232.
  • the number of solid parts 231 and the number of hollow parts 232 located in the second row are both less than the number of solid parts 231 and the number of hollow parts 232 located in the first row.
  • the first power signal traces 230 located in the third row are patterned to form traces with a plurality of solid portions 231 and a plurality of hollow portions 232 arranged at intervals. The orthographic projection of this part of the traces on the display substrate 210, as shown in FIG.
  • the first power signal trace 230 located in the n-1 th row is patterned to form a trace with two solid parts 231 and one hollow part 232 arranged at intervals. The orthographic projection of this part of the trace on the display substrate 210 , as shown in FIG.
  • the first rectangle corresponds to the solid part 231
  • the second rectangle corresponds to the hollow part 232 .
  • the number of solid parts 231 and the number of hollow parts 232 located at the n-1th row are both less than the number of solid parts 231 and the number of hollow parts 232 located at the n-2th row. number.
  • the first power signal trace 230 located at the nth row position is patterned to form a trace with one solid portion 231 and zero hollow portions 232 . The orthographic projection of this part of the trace on the display substrate 210 , as shown in FIG.
  • the first power signal trace 230 is formed, and the structure of the formed first power signal trace 230 is equivalent to that the width of the first power signal trace 230 far from the printed circuit board 220 is greater than that close to the printed circuit board 220.
  • the width of the first power signal trace 230 of the circuit board 220 is a first rectangle and zero second rectangles, the first rectangle corresponds to the solid part 231 , and the second rectangle corresponds to the hollow part 232 .
  • the number of solid parts 231 and the number of hollow parts 232 located at the nth row are both less than the number of solid parts 231 and the number of hollow parts 232 located at the n-1th row .
  • This arrangement can effectively overcome the problem in the prior art that the voltage of the power supply wiring close to the connection terminal 260 is higher and the voltage of the power supply wiring far from the connection terminal 260 is lower. Therefore, the difference between the terminal voltages of the light-emitting devices in two adjacent rows can be further reduced, so that the brightness difference of the light-emitting devices in each row becomes smaller, and the brightness uniformity of the panel display is improved.
  • the width of the first power signal trace 230 disposed away from the printed circuit board 220 is greater than the width of the first power signal trace 230 close to the printed circuit board 220
  • the width of the second power signal trace 240 away from the printed circuit board 220 is larger than the width of the second power signal trace 240 close to the printed circuit board 220 . Since the resistance of the second power signal trace 240 is related to the trace resistivity, trace length and trace cross-sectional area, when the trace resistivity and trace length are constant, the cross-sectional area of the trace will be changed accordingly by changing the trace resistance. The resistance of the second power signal trace 240 .
  • the resistance of the second power signal trace 240 located away from the printed circuit board 220 may be relatively small, and the resistance of the second power signal trace 240 located close to the printed circuit board 220 may be relatively large.
  • This arrangement can effectively overcome the problem in the prior art that the voltage of the power supply wiring close to the connection terminal 260 is higher and the voltage of the power supply wiring far from the connection terminal 260 is lower. Therefore, the difference between the terminal voltages of the light-emitting devices in two adjacent rows can be further reduced, so that the brightness difference of the light-emitting devices in each row becomes smaller, and the brightness uniformity of the panel display is improved.
  • the second power signal trace 240 may have a pattern structure.
  • the second power signal trace on the side close to the printed circuit board includes a plurality of third hollows; the second power signal trace on the side away from the printed circuit board includes a plurality of fourth The hollows; the number of the third hollows is greater than the number of the fourth hollows.
  • the second power signal traces 240 located in the first row are patterned to form traces with several solid parts 241 and several hollow parts 242 arranged at intervals.
  • the orthographic projection of this part of the trace on the display substrate 210 includes a plurality of first rectangles and a plurality of second rectangles, the first rectangles correspond to the solid portion 241, and the second rectangles correspond to the hollow portions 242.
  • the second power signal traces 240 located in the second row are patterned to form traces with a plurality of solid portions 241 and a plurality of hollow portions 242 arranged at intervals.
  • the orthographic projection of this part of the trace on the display substrate 210 as shown in FIG.
  • the first rectangles correspond to the solid portion 241
  • the second rectangles correspond to the hollow portions 242.
  • the number of solid parts 241 and the number of hollow parts 242 located in the second row are both less than the number of solid parts 241 and the number of hollow parts 242 located in the first row.
  • the second power signal traces 240 located in the third row are patterned to form traces with a plurality of solid portions 241 and a plurality of hollow portions 242 arranged at intervals. The orthographic projection of this part of the trace on the display substrate 210, as shown in FIG.
  • the second power signal trace 240 located at the n-1 th row is patterned to form a trace with two solid parts 241 and one hollow part 242 arranged at intervals. The orthographic projection of this part of the trace on the display substrate 210 , as shown in FIG.
  • the first rectangle corresponds to the solid part 241
  • the second rectangle corresponds to the hollow part 242 .
  • the number of solid parts 241 and the number of hollow parts 242 at the position of the n-1th row are both less than the number of the solid parts 241 and the number of hollow parts 242 at the position of the n-2th row. number.
  • the second power signal trace 240 at the nth row position is patterned to form a trace with one solid portion 241 and zero hollow portions 242, where n is according to the display The number of rows obtained by dividing the size of the substrate 210 equally, n is greater than 1.
  • the orthographic projection of this part of the trace on the display substrate 210 includes a first rectangle and zero second rectangles.
  • the first rectangle corresponds to the solid portion 241 and the second rectangle corresponds to the hollow portion 242 .
  • the number of solid parts 241 and the number of hollow parts 242 located at the nth row are both less than the number of solid parts 241 and the number of hollow parts 242 located at the n-1th row .
  • the second power signal trace 240 is formed, and the structure of the formed second power signal trace 240 is equivalent to that the width of the second power signal trace 240 far from the printed circuit board 220 is greater than that close to the printed circuit board 220.
  • the width of the second power signal trace 240 of the circuit board 220 can effectively overcome the problem in the prior art that the voltage of the power supply wiring close to the connection terminal 260 is higher and the voltage of the power supply wiring far from the connection terminal 260 is lower. Therefore, the difference between the terminal voltages of the light-emitting devices in two adjacent rows can be further reduced, so that the brightness difference of the light-emitting devices in each row becomes smaller, and the brightness uniformity of the panel display is improved.
  • the first power signal wiring 230 is also set to have a patterned structure.
  • the patterned structure of the second power signal trace 240 and the patterned structure of the first power signal trace 230 may be set to be different, or the patterned structure of the two traces may be set to be the same.
  • the difference between the terminal voltages of the light-emitting devices in two adjacent rows can be further reduced, so that the brightness difference of the light-emitting devices in each row can also be changed. smaller, and improve the brightness uniformity of the panel display.
  • first power signal traces 230 and the second power signal traces 240 may also be patterned into target structures, so that the voltage value of the terminal voltage of the light-emitting devices in each row of the display substrate is In this way, the brightness uniformity of the display panel can be achieved.
  • the first power signal trace 230 and the second power signal trace 240 may be arranged in different layers on the base substrate, so as to increase the area of the power signal trace, Thereby, the resistance of the power signal traces is reduced, and the display unevenness caused by the IR drop (IR drop) is reduced.
  • a display device provided by the embodiments of the present application has been introduced in detail above.
  • the principles and implementations of the present application are described in this paper by using specific examples.
  • the descriptions of the above embodiments are only used to help understand the technical solutions of the present application. and its core idea; those of ordinary skill in the art should understand that: it is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements to some of the technical features; and these modifications or replacements do not make the corresponding
  • the essence of the technical solutions deviates from the scope of the technical solutions of the embodiments of the present application.

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Abstract

本申请披露了一种显示装置，所述显示装置通过倒置电源信号走线的电源接入端的位置，由靠近印刷电路板一侧的电源接入端的位置改为远离印刷电路板一侧的电源接入端的位置，以使显示基板上的相邻两行的发光器件的端电压之间的差值小于目标差值，电流差值也相应变小，从而使得每一行的发光器件的亮度差减小至无法通过人眼较容易地识别出的程度，进而改善显示装置的显示画面品质。

Description

显示装置 技术领域
本申请涉及显示技术领域，尤其涉及一种显示装置。
 背景技术
有机发光二极管（Organic Light Emitting Display, OLED）面板具有自发光、驱动电压低、发光效率高、响应时间短、清晰度与对比度高、近180度视角、使用温度范围宽及可实现柔性显示与大面积全色显示等诸多优点。
随着显示技术不断的发展，次毫米发光二极管(Mini-LED)和微型发光二极管(Micro-LED)因具有和有机发光二极管相近的发光效果和较大的成本优势，成为显示技术发展的重要方向。
目前，显示装置的发光主要依靠两个电源信号VDD和VSS来提供。图1示出了显示装置的结构示意图。图2示出了显示装置中的像素驱动的等效电路示意图。参阅图1，在显示装置中，显示区设置有以矩阵形式排列的多个像素单元111。
目前像素单元111的驱动主要有两种方式，2T1C和1T1MOS方式，但不限于此。以1T1MOS方式为例，参阅图2，在忽略MOS管内阻的情况下，流经有机发光二极管LED的电流I=（VDD-VSS）/R LED.由于VDD电源信号走线130和VSS电源信号走线140的截面积通常比较小，不可避免产生一定阻值（即每一行VDD走线电阻R0和每一行VSS走线电阻R1的存在）。于是，沿靠近印刷电路板120（PCB板，下文相同）一侧至远离印刷电路板120一侧的方向，在显示基板110上的每一行的VDD电压值为逐渐减小，而每一行的VSS电压值为逐渐增大。因此，施加在每一行的有机发光二极管150两端的电压ΔV=VDD-VSS为逐渐减小，电流I也相应地依次减小，从而导致位于靠近印刷电路板120一侧至位于远离印刷电路板120一侧的亮度表现为下降。若每一行的有机发光二极管150之间的亮度差为过大，人眼视觉会感受到明显的亮暗不均，从而影响到显示装置的显示画面品质。
技术问题
本申请实施例提供一种显示装置，其通过倒置电源信号走线的电源接入端的位置，由靠近印刷电路板一侧的电源接入端的位置改为远离印刷电路板一侧的电源接入端的位置，使得沿靠近印刷电路板至远离印刷电路板方向上的相邻两行的发光器件（包括例如有机发光二极管）端电压之间的差值小于目标差值，电流差值也相应变小，从而使得每一行的发光器件的亮度差减小至无法通过人眼较容易地识别出的程度，进而改善显示装置的显示画面品质。
 技术解决方案
根据本申请的一方面，本申请提供一种显示装置，显示装置包括：显示基板，在所述显示基板上设置呈阵列分布的多个发光器件；印刷电路板，设置在所述显示基板的一侧；第一电源信号走线和第二电源信号走线，均用于提供电源信号至所述多个发光器件；其中，当所述第一电源信号走线的第一电源接入端设置于靠近所述印刷电路板一侧，所述第二电源信号走线的第二电源接入端设置于远离所述印刷电路板一侧时，沿靠近印刷电路板至远离印刷电路板方向上的相邻两行的所述发光器件的端电压之间的差值小于目标差值，以使所述显示基板每一行的所述发光器件的亮度基本不变；远离所述印刷电路板的所述第一电源信号走线的宽度大于靠近所述印刷电路板的所述第一电源信号走线的宽度；远离所述印刷电路板的所述第二电源信号走线的宽度大于靠近所述印刷电路板的所述第二电源信号走线的宽度。
在上述方案的基础上，可以进行以下改进。
在本申请的至少一些实施例中，所述第一电源信号走线从靠近所述印刷电路板的一侧朝远离印刷电路板的一侧延伸；所述第二电源信号走线从远离所述印刷电路板的一侧朝靠近印刷电路板的一侧延伸。
在本申请的至少一些实施例中，所述第一电源信号走线具有图案化结构。
在本申请的至少一些实施例中，所述第二电源信号走线具有图案化结构。
在本申请的至少一些实施例中，靠近所述印刷电路板一侧的所述第一电源信号走线包括多个第一挖空部；远离所述印刷电路板一侧的所述第一电源信号走线包括多个第二挖空部；第一挖空部的数量大于第二挖空部的数量。
在本申请的至少一些实施例中，靠近所述印刷电路板一侧的所述第二电源信号走线包括多个第三挖空部；远离所述印刷电路板一侧的所述第二电源信号走线包括多个第四挖空部；第三挖空部的数量大于第四挖空部的数量。
在本申请的至少一些实施例中，所述第一电源信号走线或所述第二电源信号走线设置在所述显示基板的不同膜层上。
在本申请的至少一些实施例中，所述第一电源信号走线和所述第二电源信号走线的材料相同。
在本申请的至少一些实施例中，所述显示基板每一行的所述发光器件的端电压的电压值为不变。
根据本申请的另一方面，本申请提供一种显示装置，所述显示装置包括：显示基板，在所述显示基板上设置呈阵列分布的多个发光器件；印刷电路板，设置在所述显示基板的一侧；第一电源信号走线和第二电源信号走线，均用于提供电源信号至所述多个发光器件；其中，当所述第一电源信号走线的第一电源接入端设置于靠近所述印刷电路板一侧，所述第二电源信号走线的第二电源接入端设置于远离所述印刷电路板一侧时，沿靠近印刷电路板至远离印刷电路板方向上的相邻两行的所述发光器件的端电压之间的差值小于目标差值，以使所述显示基板每一行的所述发光器件的亮度基本不变。
在本申请的至少一些实施例中，所述第一电源信号走线从靠近所述印刷电路板的一侧朝远离印刷电路板的一侧延伸；所述第二电源信号走线从远离所述印刷电路板的一侧朝靠近印刷电路板的一侧延伸。
在本申请的至少一些实施例中，远离所述印刷电路板的所述第一电源信号走线的宽度大于靠近所述印刷电路板的所述第一电源信号走线的宽度。
在本申请的至少一些实施例中，远离所述印刷电路板的所述第二电源信号走线的宽度大于靠近所述印刷电路板的所述第二电源信号走线的宽度。
在本申请的至少一些实施例中，所述第一电源信号走线具有图案化结构。
在本申请的至少一些实施例中，所述第二电源信号走线具有图案化结构。
在本申请的至少一些实施例中，靠近所述印刷电路板一侧的所述第一电源信号走线包括多个第一挖空部；远离所述印刷电路板一侧的所述第一电源信号走线包括多个第二挖空部；第一挖空部的数量大于第二挖空部的数量。
在本申请的至少一些实施例中，靠近所述印刷电路板一侧的所述第二电源信号走线包括多个第三挖空部；远离所述印刷电路板一侧的所述第二电源信号走线包括多个第四挖空部；第三挖空部的数量大于第四挖空部的数量。
在本申请的至少一些实施例中，所述第一电源信号走线或所述第二电源信号走线设置在所述显示基板的不同膜层上。
在本申请的至少一些实施例中，所述第一电源信号走线和所述第二电源信号走线的材料相同。
在本申请的至少一些实施例中，所述显示基板每一行的所述发光器件的端电压的电压值为不变。
 有益效果
本申请实施例提供的一种显示装置，其通过倒置电源信号走线的电源接入端的位置，由靠近印刷电路板一侧的电源接入端的位置改为远离印刷电路板一侧的电源接入端的位置，使得沿靠近印刷电路板至远离印刷电路板方向上的相邻两行的发光器件（包括例如有机发光二极管）端电压之间的差值小于目标差值，电流差值也相应变小，从而使得每一行的发光器件的亮度差减小至无法通过人眼较容易地识别出的程度，进而优化显示装置的电流驱动架构，并且提升显示装置的显示品质。
 附图说明
下面结合附图，通过对本申请的具体实施方式详细描述，将使本申请的技术方案及其它有益效果显而易见。
图1是现有技术中的显示装置的结构示意图。
图2是图1所示的显示装置的像素驱动的等效电路图。
图3是本申请一实施例中的显示装置的结构示意图。
图4是本申请另一实施例中的显示装置的结构示意图。
图5是图4所示的第一电源信号走线的图案化结构示意图。
图6是本申请又一实施例中的显示装置的结构示意图。
图7是图6所示的第二电源信号走线的图案化结构示意图。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接或可以相互通讯；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
参阅图3，图3是本申请一实施例中的显示装置的结构示意图。
在本申请一实施例中，提供了一种显示装置。所述显示装置包括：显示基板210，在所述显示基板210上设置有多个像素电路211（与像素单元对应）和多个发光器件（可参阅图2所示的150），其中所述多个像素电路211与所述发光器件一一对应，多个发光器件呈阵列分布；印刷电路板220，设置在所述显示基板210的一侧，用于提供电信号至所述显示基板210；第一电源信号走线230和第二电源信号走线240，均设置在所述显示基板210上，用于提供电源信号至所述多个发光器件；其中，位于所述显示基板210每一行的所述发光器件150的端电压为位于所述显示基板210每一行的第一电源信号走线230的第一电压与位于所述显示基板210每一行的第二电源信号走线240的第二电压的电压差，当所述第一电源信号走线230的第一电源接入端A设置于靠近所述印刷电路板220一侧，所述第二电源信号走线240的第二电源接入端B设置于远离所述印刷电路板220一侧时，沿靠近印刷电路板至远离印刷电路板方向上的相邻两行的所述发光器件的端电压之间的差值小于目标差值，以使所述显示基板每一行的所述发光器件的亮度基本不变。
具体地，显示基板210包括一衬底基板（图中未标注）及位于衬底基板上的多个膜层。其中，衬底基板和多个膜层结构可以为本领域技术人员所熟知的结构，在此不再详述。所述衬底基板可以包括一显示区（array area, 简称AA区）（图中未标注）。所述显示区包括多个像素单元（与图3中的标号211所示的像素电路相对应），每个像素单元可以包括多个子像素。每一个子像素包括一个发光器件和与该发光器件电连接的一个像素电路211。该像素电路211用于驱动发光器件发光。像素电路211可以包括电流控制电路及时长控制电路。在本申请的一些实施中，像素电路211为电流控制电路。其中，电流控制电路可以为2T1C的控制电路，也可以为1T1MOS的控制电路。在本实施例中，采用1T1MOS的控制电路。在实际应用中，该像素电路211的结构可以与相关技术中的结构和工作原理基本相同，为本领域普通技术人员应该理解的，在此不再赘述，也不应作为对本申请的限制。
在本实施例中，显示装置还包括印刷电路板220。具体的，印刷电路板220（Printed Circuit Board,简称PCB）可以为柔性印刷电路板，其为一种高精度柔性印刷电路板，该印刷电路板220设置在显示基板210的一侧。在本实施中，该印刷电路板220设置在显示基板210的顶部。进一步，所述印刷电路板220可以用于将显示装置的显示面板和显示装置的主板电路电连接，以实现显示面板与主板电路的信号传输。且，柔性印刷电路板可以绑定在衬底基板的弯折区，以避免柔性印刷电路板占用显示装置的边框区域，减少显示装置的边框宽度，从而增加显示装置的屏占比。在本实施例中，所述印刷电路板220用于提供电信号至所述显示基板210。
在本实施例中，所述印刷电路板220可以通过多个接线端子260并利用设置在所述显示基板210上的电源信号走线，以将电源信号提供至显示基板210。其中，所述接线端子260与所述印刷电路板220设置在所述显示基板210的同一侧。在本实施例中，所述电源信号走线包括第一电源信号走线230和第二电源信号走线240。下文中出现的走线即指电源信号走线。其中，第一电源信号走线230用于提供第一电压，第二电源信号走线240用于提供第二电压，其中第一电压可以为驱动发光器件发光所需的工作电压VDD或公共电压VSS。第二电压可以为与第一电压对应的驱动发光器件发光所需的工作电压VDD或公共电压VSS。例如第一电压为工作电压VDD，第二电压为公共电压VSS，或者第一电压为公共电压VSS，第二电压为工作电压VDD。在本实施例中，以第一电压为工作电压VDD，第二电压为公共电压VSS为例，即第一电源信号走线230提供工作电压VDD，第二电源信号走线240提供公共电压VSS，而且以上设置仅为举例，并不用以限制本申请。需说明的是，通常工作电压VDD为高电压，公共电压VSS为低电压。
参阅图3，在本实施中，第一电源信号走线230的第一电源接入端A设置于靠近印刷电路板220的一侧，第二电源信号走线240的第二电源接入端B设置于远离印刷电路板220的一侧。具体的，印刷电路板220通过接线端子260连接至第一电源接入端A。同时，印刷电路板220通过接线端子260以及辅助走线270连接至第二电源接入端B。其中，辅助走线270可以沿显示装置的边框方向设置，其一端连接至接线端子260，另一端连接至第二电源接入端B，接线端子260位于靠近印刷电路板220的一侧，第二电源接入端B位于远离印刷电路板220的一侧，例如第二电源接入端B设置在显示装置与印刷电路板220一侧相对的端部。需注意的是，辅助走线与接线端子及第二电源接入端的连接方式不限于此，以上连接方式仅为举例，并不用以限制本申请。
在现有技术中，将第一电源信号走线的第一电源接入端A和第二电源信号走线的第二电源接入端B同时设置在靠近印刷电路板的接线端子。亦即，采用共阴接法或共阳接法。然而，采用该种接法所存在的缺陷在于，沿靠近印刷电路板一侧至远离印刷电路板一侧的方向，在显示基板上的每一行的VDD电压值为逐渐减小，而每一行的VSS电压值为逐渐增大，由此造成施加在每一行的发光器件（例如有机发光二极管）端电压ΔV=VDD-VSS为逐渐减小，电流I也相应地依次减小，从而使得位于靠近印刷电路板一侧至位于远离印刷电路板一侧的亮度表现为下降（由于相邻两行的发光器件端电压之间的减小幅度较大，因此发光器件的亮度差的下降幅度也相应较大），这样每一行的发光器件之间的亮度差可能会过大，于是人眼视觉会感受到明显的亮暗不均，并影响显示画面品质。
因此，在本申请的实施例中，将第一电源信号走线230的第一电源接入端A设置在靠近印刷电路板220一侧，并且将第二电源信号走线240的第二电源接入端B设置在远离印刷电路板220一侧。如此设计，可使得沿靠近印刷电路板220一侧至远离印刷电路板220一侧的方向上的工作电压VDD逐渐减小，与此同时，公共电压VSS也逐渐减小。在本实施例中，将显示基板210划分若干个行和若干个列，每一行和每一列形成相应的像素单元。若假设，最靠近印刷电路板220一侧的一行为首行，则最远离印刷电路板220一侧的一行为尾行。如此设置，相邻两行的所述发光器件的端电压ΔV=VDD-VSS之间的差值小于目标差值（即使得发光器件的端电压的减小幅度相对较小），流经发光器件的电流之间的差值也相应变小，从而使得各行的发光器件的亮度基本不变，这样能够达到无法通过人眼较容易地识别出亮度差的程度，并且改善显示画面显示不均的情况。
在本申请的一些实施例中，发光器件的发光部可以包括：电致发光层251，参阅图2。具体地，电致发光层251的材料可以包括电致发光材料，例如有机电致发光材料和无机电致发光材料，在此不作限定。而在本申请的一些实施例中，发光器件的发光部可也可以包括LED(Light Emitting Diode,发光二极管)芯片252，参阅图2。具体地，LED芯片252的尺寸可以为微米级。进一步地，微型发光二极管（Micro Light Emitting Diode，Micro LED）具有亮度高、发光效率高、功耗低等优点。在本申请的一些实施例中，可以将微米级的LED芯片252设置为Micro LED芯片。或者，在本申请的一些实施例中，Micro LED芯片的尺寸也可以为纳米级。进一步地，迷你发光二极管（Mini Light Emitting Diode，Mini LED）的尺寸更小，可以实现高分辨率的显示屏。另外，在一些实施例中，在衬底基板（例如为玻璃基衬底）上制备有机发光二极管（Organic Light Emitting Diode, OLED）和驱动OLED发光的像素电路，以形成OLED面板。
在本申请的一些实施例中，所述第一电源信号走线230从靠近所述印刷电路板220的一侧朝远离印刷电路板220的一侧延伸。同样，所述第二电源信号走线240从远离所述印刷电路板220的一侧朝靠近印刷电路板220的一侧延伸。具体地，所述第一电源信号走线230可以沿靠近所述印刷电路板220的一侧朝远离印刷电路板220的一侧延伸，且所述第一电源信号走线230的设置方向为垂直于显示装置的横轴方向（横轴方向平行于印刷电路板220的设置方向）。当然，在其他部分实施例中，所述第一电源信号走线230可以沿靠近所述印刷电路板220的一侧朝远离印刷电路板220的一侧延伸，且所述第一电源信号走线230的设置方向与显示装置的横轴方向成一小于90度的角度。同样，所述第二电源信号走线240可以沿远离所述印刷电路板220的一侧朝靠近印刷电路板220的一侧延伸，且所述第二电源信号走线240的设置方向为垂直于显示装置的横轴方向（横轴方向平行于印刷电路板220的设置方向）。当然，在其他部分实施例中，所述第二电源信号走线240可以沿远离所述印刷电路板220的一侧朝靠近印刷电路板220的一侧延伸，且所述第二电源信号走线240的设置方向与显示装置的横轴方向成一小于90度的角度。
参阅图4，在本申请的另一实施例中，远离所述印刷电路板220的第一电源信号走线230的宽度大于靠近所述印刷电路板220的第一电源信号走线230的宽度。第一电源信号走线230和第二电源信号走线240的走线截面积与第一电源信号走线230和第二电源信号走线240的走线宽度有关。走线的横截面积等于走线宽度乘以走线厚度，走线宽度为如图4和图5所示的第一方向D1上的宽度，走线厚度为如图4和图5所示的在垂直于第一方向D1和第二方向D2的方向上的厚度。当走线宽度发生改变，在走线厚度一定的情况下，走线截面积相应地发生改变。另外，由于第一电源信号走线230的电阻与走线电阻率、走线长度及走线截面积有关，当走线电阻率和走线长度为一定时，通过改变走线截面积也会相应地改变第一电源信号走线230的电阻。因此，可以设置位于远离印刷电路板220的第一电源信号走线230的电阻相对较小，而位于靠近印刷电路板220的第一电源信号走线230的电阻相对较大，即位于远离印刷电路板220的第一电源信号走线230的电阻小于第一预设电阻值，位于靠近印刷电路板220的第一电源信号走线230的电阻大于第二预设电阻值。如此设置，可以有效地克服现有技术中，靠近接线端子260的电源走线的电压较高，而远离接线端子260的电源走线的电压较低的问题。于是，能够进一步减小每一行发光器件的端电压之间的差值，从而使得相邻两行的发光器件的亮度差也变得更小，并且提高面板显示的亮度均一性。
在其他部分实施例中，也可以将远离所述印刷电路板220的第二电源信号走线240的宽度设置为大于靠近所述印刷电路板220的第二电源信号走线240的宽度。
为了要实现远离所述印刷电路板220的第一电源信号走线230的宽度大于靠近所述印刷电路板220的第一电源信号走线230的宽度，可以将第一电源信号走线230具有图案化结构。其中，靠近所述印刷电路板220一侧的所述第一电源信号走线230包括多个第一挖空部；远离所述印刷电路板220一侧的所述第一电源信号走线230包括多个第二挖空部；第一挖空部的数量大于第二挖空部的数量。
具体地，将位于首行（即第一行）位置的第一电源信号走线230进行图案化，以形成具有若干个实体部231和若干个挖空部232间隔设置的走线。该部分的走线在显示基板210上的正投影，如图5所示，包括多个第一矩形和多个第二矩形，第一矩形对应于实体部231，第二矩形对应于挖空部232。同样，将位于第二行位置的第一电源信号走线230进行图案化，以形成具有若干个实体部231和若干个挖空部232间隔设置的走线。该部分的走线在显示基板210上的正投影，如图5所示，包括多个第一矩形和多个第二矩形，第一矩形对应于实体部231，第二矩形对应于挖空部232。需注意的是，位于第二行位置的实体部231的个数和挖空部232的个数均少于位于第一行位置的实体部231的个数和挖空部232的个数。同样，将位于第三行位置的第一电源信号走线230进行图案化，以形成具有若干个实体部231和若干个挖空部232间隔设置的走线。该部分的走线在显示基板210上的正投影，如图5所示，包括多个第一矩形和多个第二矩形，第一矩形对应于实体部231，第二矩形对应于挖空部232。需注意的是，位于第三行位置的实体部231的个数和挖空部232的个数均少于位于第二行位置的实体部231的个数和挖空部232的个数。以此类推，将位于第n-1行位置的第一电源信号走线230进行图案化，以形成具有两个实体部231和一个挖空部232间隔设置的走线。该部分的走线在显示基板210上的正投影，如图5所示，包括两个第一矩形和一个第二矩形，第一矩形对应于实体部231，第二矩形对应于挖空部232。需注意的是，位于第n-1行位置的实体部231的个数和挖空部232的个数均少于位于第n-2行位置的实体部231的个数和挖空部232的个数。同样，将位于第n行位置(或位于未行位置)的第一电源信号走线230进行图案化，以形成具有一个实体部231和零个挖空部232的走线。该部分的走线在显示基板210上的正投影，如图5所示，包括一个第一矩形和零个第二矩形，第一矩形对应于实体部231，第二矩形对应于挖空部232。需注意的是，位于第n行位置的实体部231的个数和挖空部232的个数均少于位于第n-1行位置的实体部231的个数和挖空部232的个数。通过上述设计方式，形成第一电源信号走线230，且形成的第一电源信号走线230的结构相当于远离所述印刷电路板220的第一电源信号走线230的宽度大于靠近所述印刷电路板220的第一电源信号走线230的宽度。如此设置，可以有效地克服现有技术中靠近接线端子260的电源走线的电压较高而远离接线端子260的电源走线的电压较低的问题。于是可以进一步减小相邻两行的发光器件的端电压之间的差值，从而使得每一行发光器件的亮度差也变得更小，且提高面板显示的亮度均一性。
参阅图6，在本申请的又一实施例中，在设置远离所述印刷电路板220的第一电源信号走线230的宽度大于靠近所述印刷电路板220的第一电源信号走线230的宽度的情况下，同时将远离所述印刷电路板220的第二电源信号走线240的宽度大于靠近所述印刷电路板220的第二电源信号走线240的宽度。由于第二电源信号走线240的电阻与走线电阻率、走线长度及走线截面积有关，当走线电阻率和走线长度为一定时，通过改变走线截面积也会相应地改变第二电源信号走线240的电阻。因此，可以设置位于远离印刷电路板220的第二电源信号走线240的电阻相对较小，而位于靠近印刷电路板220的第二电源信号走线240的电阻相对较大。如此设置，可以有效地克服现有技术中靠近接线端子260的电源走线的电压较高而远离接线端子260的电源走线的电压较低的问题。于是可以进一步减小相邻两行的发光器件的端电压之间的差值，从而使得每一行发光器件的亮度差也变得更小，且提高面板显示的亮度均一性。
为了要实现远离所述印刷电路板220的第二电源信号走线240的宽度大于靠近所述印刷电路板220的第二电源信号走线240的宽度，可以将第二电源信号走线240具有图案化结构。其中，靠近所述印刷电路板一侧的所述第二电源信号走线包括多个第三挖空部；远离所述印刷电路板一侧的所述第二电源信号走线包括多个第四挖空部；第三挖空部的数量大于第四挖空部的数量。
具体地，将位于首行（即第一行）位置的第二电源信号走线240进行图案化，以形成具有若干个实体部241和若干个挖空部242间隔设置的走线。该部分的走线在显示基板210上的正投影，如图7所示，包括多个第一矩形和多个第二矩形，第一矩形对应于实体部241，第二矩形对应于挖空部242。同样，将位于第二行位置的第二电源信号走线240进行图案化，以形成具有若干个实体部241和若干个挖空部242间隔设置的走线。该部分的走线在显示基板210上的正投影，如图7所示，包括多个第一矩形和多个第二矩形，第一矩形对应于实体部241，第二矩形对应于挖空部242。需注意的是，位于第二行位置的实体部241的个数和挖空部242的个数均少于位于第一行位置的实体部241的个数和挖空部242的个数。同样，将位于第三行位置的第二电源信号走线240进行图案化，以形成具有若干个实体部241和若干个挖空部242间隔设置的走线。该部分的走线在显示基板210上的正投影，如图7所示，包括多个第一矩形和多个第二矩形，第一矩形对应于实体部241，第二矩形对应于挖空部242。需注意的是，位于第三行位置的实体部241的个数和挖空部242的个数均少于位于第二行位置的实体部241的个数和挖空部242的个数。以此类推，将位于第n-1行位置的第二电源信号走线240进行图案化，以形成具有两个实体部241和一个挖空部242间隔设置的走线。该部分的走线在显示基板210上的正投影，如图7所示，包括两个第一矩形和一个第二矩形，第一矩形对应于实体部241，第二矩形对应于挖空部242。需注意的是，位于第n-1行位置的实体部241的个数和挖空部242的个数均少于位于第n-2行位置的实体部241的个数和挖空部242的个数。同样，将位于第n行位置(或位于未行位置)的第二电源信号走线240进行图案化，以形成具有一个实体部241和零个挖空部242的走线，其中n是根据显示基板210的尺寸均分而获得的行数，n大于1。该部分的走线在显示基板210上的正投影，如图7所示，包括一个第一矩形和零个第二矩形，第一矩形对应于实体部241，第二矩形对应于挖空部242。需注意的是，位于第n行位置的实体部241的个数和挖空部242的个数均少于位于第n-1行位置的实体部241的个数和挖空部242的个数。通过上述设计方式，形成第二电源信号走线240，且形成的第二电源信号走线240的结构相当于远离所述印刷电路板220的第二电源信号走线240的宽度大于靠近所述印刷电路板220的第二电源信号走线240的宽度。如此设置，可以有效地克服现有技术中靠近接线端子260的电源走线的电压较高而远离接线端子260的电源走线的电压较低的问题。于是可以进一步减小相邻两行的发光器件的端电压之间的差值，从而使得每一行发光器件的亮度差也变得更小，且提高面板显示的亮度均一性。
优选地，在本申请的又一实施例中，在设置第二电源信号走线240具有图案化结构的同时，设置第一电源信号走线230也具有图案化结构。具体地，可以将第二电源信号走线240的图案化结构与第一电源信号走线230的图案化结构设置为不同，也可以将两者走线的图案化结构设置为相同。优选地，当将两者走线的图案化结构设置为相同时，从而能够进一步减小相邻两行的发光器件的端电压之间的差值，进而使得每一行发光器件的亮度差也变得更小，且提高面板显示的亮度均一性。在其他部分实施例中，也可以对第一电源信号走线230和第二电源信号走线240图案化成目标结构，以使所述显示基板每一行的所述发光器件的端电压的电压值为不变，这样，能够实现显示面板的亮度均一性。
另外，在本申请的部分实施中，可以将第一电源信号走线230和第二电源信号走线240设置在衬底基板上的不同膜层中，以便于增大电源信号走线的面积，从而减小电源信号走线的电阻，进而减小由于IR压降（IR drop）所导致的显示不均匀的现象。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
以上对本申请实施例所提供的一种显示装置进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的技术方案及其核心思想；本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例的技术方案的范围。

Claims (20)

  1. 一种显示装置，其包括：
    显示基板，在所述显示基板上设置呈阵列分布的多个发光器件；
    印刷电路板，设置在所述显示基板的一侧；
    第一电源信号走线和第二电源信号走线，均用于提供电源信号至所述多个发光器件；
    其中，当所述第一电源信号走线的第一电源接入端设置于靠近所述印刷电路板一侧，所述第二电源信号走线的第二电源接入端设置于远离所述印刷电路板一侧时，沿靠近印刷电路板至远离印刷电路板方向上的相邻两行的所述发光器件的端电压之间的差值小于目标差值，以使所述显示基板每一行的所述发光器件的亮度基本不变；远离所述印刷电路板的所述第一电源信号走线的宽度大于靠近所述印刷电路板的所述第一电源信号走线的宽度；远离所述印刷电路板的所述第二电源信号走线的宽度大于靠近所述印刷电路板的所述第二电源信号走线的宽度。
  2. 根据权利要求1所述的显示装置，其中所述第一电源信号走线从靠近所述印刷电路板的一侧朝远离印刷电路板的一侧延伸；所述第二电源信号走线从远离所述印刷电路板的一侧朝靠近印刷电路板的一侧延伸。
  3. 根据权利要求1所述的显示装置，其中所述第一电源信号走线具有图案化结构。
  4. 根据权利要求1或3所述的显示装置，其中所述第二电源信号走线具有图案化结构。
  5. 根据权利要求1所述的显示装置，其中靠近所述印刷电路板一侧的所述第一电源信号走线包括多个第一挖空部；远离所述印刷电路板一侧的所述第一电源信号走线包括多个第二挖空部；第一挖空部的数量大于第二挖空部的数量。
  6. 根据权利要求1所述的显示装置，其中靠近所述印刷电路板一侧的所述第二电源信号走线包括多个第三挖空部；远离所述印刷电路板一侧的所述第二电源信号走线包括多个第四挖空部；第三挖空部的数量大于第四挖空部的数量。
  7. 根据权利要求1所述的显示装置，其中所述第一电源信号走线或所述第二电源信号走线设置在所述显示基板的不同膜层上。
  8. 根据权利要求1所述的显示装置，其中所述第一电源信号走线和所述第二电源信号走线的材料相同。
  9. 根据权利要求1所述的显示装置，其中所述显示基板每一行的所述发光器件的端电压的电压值为不变。
  10. 一种显示装置，其包括：
    显示基板，在所述显示基板上设置呈阵列分布的多个发光器件；
    印刷电路板，设置在所述显示基板的一侧；
    第一电源信号走线和第二电源信号走线，均用于提供电源信号至所述多个发光器件；
    其中，当所述第一电源信号走线的第一电源接入端设置于靠近所述印刷电路板一侧，所述第二电源信号走线的第二电源接入端设置于远离所述印刷电路板一侧时，沿靠近印刷电路板至远离印刷电路板方向上的相邻两行的所述发光器件的端电压之间的差值小于目标差值，以使所述显示基板每一行的所述发光器件的亮度基本不变。
  11. 根据权利要求10所述的显示装置，其中所述第一电源信号走线从靠近所述印刷电路板的一侧朝远离印刷电路板的一侧延伸；所述第二电源信号走线从远离所述印刷电路板的一侧朝靠近印刷电路板的一侧延伸。
  12. 根据权利要求10所述的显示装置，其中远离所述印刷电路板的所述第一电源信号走线的宽度大于靠近所述印刷电路板的所述第一电源信号走线的宽度。
  13. 根据权利要求10或12所述的显示装置，其中远离所述印刷电路板的所述第二电源信号走线的宽度大于靠近所述印刷电路板的所述第二电源信号走线的宽度。
  14. 根据权利要求10所述的显示装置，其中所述第一电源信号走线具有图案化结构。
  15. 根据权利要求10或14所述的显示装置，其中所述第二电源信号走线具有图案化结构。
  16. 根据权利要求14所述的显示装置，其中靠近所述印刷电路板一侧的所述第一电源信号走线包括多个第一挖空部；远离所述印刷电路板一侧的所述第一电源信号走线包括多个第二挖空部；第一挖空部的数量大于第二挖空部的数量。
  17. 根据权利要求15或16所述的显示装置，其中靠近所述印刷电路板一侧的所述第二电源信号走线包括多个第三挖空部；远离所述印刷电路板一侧的所述第二电源信号走线包括多个第四挖空部；第三挖空部的数量大于第四挖空部的数量。
  18. 根据权利要求10所述的显示装置，其中所述第一电源信号走线或所述第二电源信号走线设置在所述显示基板的不同膜层上。
  19. 根据权利要求10所述的显示装置，其中所述第一电源信号走线和所述第二电源信号走线的材料相同。
  20. 根据权利要求10所述的显示装置，其中所述显示基板每一行的所述发光器件的端电压的电压值为不变。
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