CN110718577B - Display module and display device - Google Patents
Display module and display device Download PDFInfo
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- CN110718577B CN110718577B CN201911012305.3A CN201911012305A CN110718577B CN 110718577 B CN110718577 B CN 110718577B CN 201911012305 A CN201911012305 A CN 201911012305A CN 110718577 B CN110718577 B CN 110718577B
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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
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/131—Interconnections, e.g. wiring lines or terminals
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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
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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Abstract
The invention provides a display module and a display device, which relate to the technical field of display, wherein the display module comprises: the display panel comprises a display area and a non-display area arranged around the display area, and further comprises a substrate, a plurality of sub-pixels arranged on the substrate, and a power line, wherein the power line is used for providing power signals for the sub-pixels, and comprises at least one detection point; at least one flexible circuit board bound on the substrate in the non-display area, wherein the flexible circuit board comprises a power bus which is electrically connected with the power line; the driving chip comprises at least one detection pin; and one end of the detection wire is electrically connected with the detection pin, and the other end of the detection wire is electrically connected with the detection point of the power line. The invention provides a display module and a display device, which are used for improving the uniformity of display.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display module and a display device.
Background
An OLED (Organic Light Emitting Diode) Display is a self-luminous Display, and compared with an LCD (Liquid Crystal Display), the OLED Display does not need a backlight source, so that the OLED Display is thinner and lighter, and the OLED Display has advantages of high brightness, low power consumption, wide viewing angle, high response speed, wide temperature range, and the like, and thus is increasingly applied to various high-performance Display fields.
When the display is performed, the power supply chip transmits a power supply signal to the power line through the power supply bus, and due to the fact that the voltage drop exists on the power line, the voltage drop on the power line gradually increases along with the increase of the distance from the power supply chip, and the phenomenon of uneven display is caused.
Disclosure of Invention
The invention provides a display module and a display device, which are used for improving the uniformity of display.
In a first aspect, an embodiment of the present invention provides a display module, including:
the display panel comprises a display area and a non-display area arranged around the display area, and further comprises a substrate, a plurality of sub-pixels arranged on the substrate, and a power line, wherein the power line is used for providing power signals for the sub-pixels, and comprises at least one detection point;
at least one flexible circuit board bound on the substrate in the non-display area, the flexible circuit board including a power bus electrically connected to the power line;
the driving chip comprises at least one detection pin;
and one end of the detection wire is electrically connected with the detection pin, and the other end of the detection wire is electrically connected with the detection point of the power line.
In a second aspect, an embodiment of the present invention provides a display device, including the display module in the first aspect.
In the display module provided by the embodiment of the invention, the flexible circuit board is bound on the substrate of the display panel, and the power bus arranged on the flexible circuit board is electrically connected with the power line arranged on the display panel. The detection wires can be directly electrically connected with the power line, so that the voltage value of a detection point corresponding to the detection wires can be detected through the detection wires, the compensation voltage value during display can be obtained through comparing the detected voltage value with a preset value, and the uniformity of display is improved. In the embodiment of the invention, the detection wire can be directly and electrically connected with the power line, and compared with the method for connecting the detection wire to the power bus of the flexible circuit board, the detection wire has no binding resistance when the flexible circuit board is bound to the substrate, so that the detection resistance can be reduced, the accuracy of the detected voltage value of the detection point can be improved, and the uniformity of display can be further improved.
Drawings
FIG. 1 is a schematic diagram of an equivalent circuit of a sub-pixel in a display module;
fig. 2 is a schematic top view of a display module according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view along AA' of FIG. 2;
FIG. 4 is a schematic cross-sectional view taken along the direction BB' in FIG. 2;
FIG. 5 is a schematic diagram of the bonding of the flexible circuit board and the substrate in FIG. 2;
fig. 6 is a schematic top view illustrating another display module according to an embodiment of the disclosure;
FIG. 7 is a schematic top view illustrating a display module according to another embodiment of the present invention;
FIG. 8 is a schematic diagram illustrating a top view of another display module according to an embodiment of the present invention;
fig. 9 is a schematic top view illustrating a display module according to another embodiment of the present invention;
fig. 10 is a schematic top view illustrating a display module according to another embodiment of the present invention;
fig. 11 is a schematic top view illustrating a display module according to another embodiment of the present invention;
fig. 12 is a schematic top view illustrating a display module according to another embodiment of the present invention;
fig. 13 is a schematic cross-sectional view illustrating another display module according to an embodiment of the invention;
fig. 14 is a schematic top view illustrating a display module according to another embodiment of the present invention;
FIG. 15 is a schematic cross-sectional view taken along the direction CC' in FIG. 14;
fig. 16 is a schematic top view illustrating another display module according to an embodiment of the disclosure;
FIG. 17 is a schematic sectional view taken along direction DD' in FIG. 16;
fig. 18 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic diagram of an equivalent circuit of a sub-pixel in a display module, and referring to fig. 1, a most basic sub-pixel unit generally includes a switching transistor T1, a driving transistor T2 and a storage capacitor Cs. The driving transistor T2 is connected to the organic light emitting diode OLED to supply a current for emitting light. The switching transistor T1 supplies a data voltage to control the amount of current of the driving transistor T2. A storage capacitor Cs for maintaining the supplied voltage for a predetermined time is connected between the source and gate of the driving transistor T2. The gate of the switching transistor Tl is connected to the scan line SL, and the source is connected to the data line 17, that is, the scan signal transmitted on the scan line SL controls the switching transistor T1 to be turned on and off, and when the switching transistor T1 is turned on, the data signal transmitted on the data line 17 is transmitted to the gate of the driving transistor T2, and controls the current magnitude of the driving transistor T2. The power signal transmitted on the power line 12 is transmitted to one end of the low potential ELVSS through the driving transistor T2, and the light emitting display of the organic light emitting diode OLED can be controlled. The voltage drop on the power line 12 causes display non-uniformity.
Fig. 2 is a schematic top view of a display module according to an embodiment of the present invention, fig. 3 is a schematic cross-sectional view along an AA 'direction in fig. 2, and fig. 4 is a schematic cross-sectional view along a BB' direction in fig. 2, referring to fig. 2, fig. 3 and fig. 4, the display module includes a display panel, at least one flexible circuit board 14, a driving chip 15 and a detection trace 16. The display panel includes a display area 101 (an area shown in a dashed line box) and a non-display area 102 (an area shown in a dashed line box) disposed around the display area 101, the display panel further includes a substrate 11, and a plurality of sub-pixels 13 and a power line 12 disposed on the substrate 11, the power line 12 is used for providing a power signal to the plurality of sub-pixels 13, and the power line 12 includes at least one detection point 21. The detection point 21 is a connection point between the power line 12 and the detection trace 16. When the power line 12 and the detection trace 16 are in the same layer, the power line 12 and the detection trace 16 can be directly electrically connected. When the power line 12 and the detection trace 16 are different layers, the power line 12 and the detection trace 16 can be electrically connected through a via. At least one flexible circuit board 14 is bonded to the substrate 11 within the non-display area 102, the flexible circuit board 14 including a power bus 22, the power bus 22 being electrically connected to the power line 12. The driving chip 15 includes at least one detecting pin 151. One end of the detection trace 16 is electrically connected to the detection pin 151, and the other end of the detection trace 16 is electrically connected to the detection point 21 of the power line 12.
In the display module provided by the embodiment of the invention, the flexible circuit board is bound on the substrate of the display panel, and the power bus arranged on the flexible circuit board is electrically connected with the power line arranged on the display panel. The detection wires can be directly electrically connected with the power line, so that the voltage value of a detection point corresponding to the detection wires can be detected through the detection wires, the compensation voltage value during display can be obtained through comparing the detected voltage value with a preset value, and the uniformity of display is improved. In the embodiment of the invention, the detection wire can be directly and electrically connected with the power line, and compared with the method for connecting the detection wire to the power bus of the flexible circuit board, the detection wire has no binding resistance when the flexible circuit board is bound to the substrate, so that the detection resistance can be reduced, the accuracy of the detected voltage value of the detection point can be improved, and the uniformity of display can be further improved.
Optionally, referring to fig. 2, fig. 3 and fig. 4, the display module may further include a power chip 26 and a power connection line 20, the power chip 26 is located at one end of the flexible circuit board 14 away from the power lines 12, and the power chip 26 is electrically connected to the power bus 22 and provides power signals for the plurality of power lines 12 through the power bus 22. The power connection line 20 is located in the non-display area 102 and is used for connecting the plurality of power lines 12 in the display area 101.
Exemplarily, referring to fig. 2, 3 and 4, one ends of all the power lines 12 are electrically connected to each other by one power connection line 20, the other ends of all the power lines 12 are electrically connected to each other by another power connection line 20, and the power lines 12 are electrically connected to the power bus 22 by the power connection lines 20. The power connection line 20 may be disposed in the same layer as the scan line (not shown). In other embodiments, the power connection line 20 may be disposed on other metal layers.
Exemplarily, referring to fig. 2, fig. 3 and fig. 4, the flexible circuit board 14 includes a first flexible circuit board 141, the first flexible circuit board 141 includes at least two metal layers, an insulating layer is disposed between the two metal layers, and the detection trace 16 and the power bus 22 are respectively located in two different metal layers of the first flexible circuit board 141.
Alternatively, referring to fig. 2, 3 and 4, the plurality of sub-pixels 13 are arranged in a matrix along the first direction and the second direction, and the display panel further includes a plurality of data lines 17 and data link lines 23. Each data line 17 is electrically connected with at least part of the sub-pixels 13 in the same column of sub-pixels 13, and the data lines 17 located in the display area 101 are electrically connected with the driving chip 15 through data connection lines 23. The data lines 17 and the data link lines 23 may be disposed in the same layer. The data lines 17 and the power lines 12 extend in the second direction and are arranged in the first direction. The data line 17 and the power line 12 are disposed on the same layer, so that the data line 17 and the power line 12 can be formed by the same material in the same process, thereby saving the process. In other embodiments, the data line 17 and the power line 12 may be disposed in different metal layers.
Alternatively, referring to fig. 2, fig. 3 and fig. 4, the detecting trace 16, the power line 12 and the data line 17 are disposed on the same layer, so that the detecting trace 16, the power line 12 and the data line 17 can be formed by the same material in the same process, thereby saving the process steps. In other embodiments, the detection trace 16 and the power line 12 can also be disposed in different metal layers, and the detection trace 16 and the data line 17 can also be disposed in different metal layers.
Optionally, referring to fig. 2, the line width of the detection trace 16 is greater than or equal to 6 μm. In the embodiment of the present invention, the line width of the detection trace 16 is set to be greater than or equal to 6 μm, so as to reduce the resistance of the detection trace 16, reduce the voltage drop on the detection trace 16 during the detection process, and improve the accuracy of the detected voltage value at the detection point, thereby further improving the uniformity of the display.
Fig. 5 is a schematic diagram illustrating the flexible circuit board and the substrate in fig. 2, and referring to fig. 2 and 5, the display module further includes a bonding pad 110, and the flexible circuit board 14 is bonded on the substrate 11 in the non-display area 120 through the bonding pad 110.
Exemplarily, referring to fig. 2 and 5, the display module further includes a plurality of bonding pads 110, and the plurality of bonding pads 110 are located in the non-display region 120 and located on a light emitting display side of the substrate 11 facing the display panel. The flexible circuit board 14 includes a plurality of binding pins 140, the number of the binding pins 140 is the same as the number of the binding pads 110, and one binding pin 140 is electrically connected to one binding pad 110. The bonding pins 140 and the bonding pads 110 may be electrically connected by anisotropic conductive paste (not shown in fig. 5), for example.
Fig. 6 is a schematic top view of another display module according to an embodiment of the invention, referring to fig. 6, the number of at least one detecting pin 151 is greater than or equal to 2, that is, the driving chip 15 includes at least two detecting pins 151. At least two detection points 21 are arranged in sequence along the extending direction of the data line 17 (i.e., along the second direction). In the embodiment of the present invention, the driving chip 15 includes at least two detecting pins 151, so that at least two detecting points 21 can be detected, and since the voltage drop on the power line 12 mainly occurs along the extending direction of the data line 17, at least two detecting points 21 can be arranged in sequence along the extending direction of the data line 17 to detect the voltage values at least two different positions of the power line 12 arranged along the second direction.
Alternatively, referring to fig. 6, the number of the detection points 21 is greater than 2, and the distance between any two adjacent detection points 21 is equal along the extending direction of the data line 17. In the embodiment of the present invention, the detecting points 21 are uniformly distributed along the extending direction of the data line 17, so that on one hand, the voltage values at a plurality of positions on the whole power line 12 can be detected, and the voltage distribution condition at each position on the whole power line 12 can be reflected integrally. On the other hand, the detection points 21 are uniformly distributed, and the difficulty in arranging the detection points 21 can be reduced.
Exemplarily, referring to fig. 6, the plurality of detection points 21 are disposed at different positions of the same power line 12, and the plurality of detection points 21 are uniformly distributed along the extending direction of the data line 17. In other embodiments, the plurality of detection points 21 may also be distributed on at least two power lines 12, which is not limited in the embodiments of the present invention.
Fig. 7 is a schematic top view of another display module according to an embodiment of the present invention, referring to fig. 7, a plurality of sub-pixels 13 are arranged in a matrix, the display panel further includes a plurality of data lines 17, and each data line 17 is electrically connected to at least a portion of sub-pixels 13 in the same row of sub-pixels 13. Along the extending direction of the data line 17, the arrangement density of the detection points 21 increases with the distance from the driving chip 15. Here, the arrangement density of the detection points 21 refers to the number of the detection points 21 arranged in a unit length on the power line 12. Since the voltage drop on the power line 12 at a position closer to the driving chip 15 is smaller, the voltage drop on the power line 12 at a position farther from the driving chip 15 is larger. The embodiment of the invention is provided with: the number of the detection points 21 arranged in the unit length on the power line 12 along the extending direction of the data line 17 increases with the distance from the driving chip 15, so that the detection points 21 with larger density are arranged at the positions where the power line 12 is farther away from the driving chip 15, thereby better detecting the voltage drop on the power line 12 and improving the detection precision.
Fig. 8 is a schematic top view of another display module according to an embodiment of the invention, and referring to fig. 8, at least two detection traces 16 are disposed in the non-display area 102. In the embodiment of the present invention, at least two detecting traces 16 are disposed in the non-display area 102, so that the detecting traces 16 are prevented from affecting the transmission signals on the data lines 17 and the power lines 12 in the display area 101, and the non-display area 102 has a larger wiring space compared to the display area 101, thereby reducing the wiring difficulty.
Optionally, referring to fig. 8, the at least two detection traces 16 include at least one first detection trace 161 and at least one second detection trace 162, and along a direction perpendicular to the extending direction of the data line 17 (i.e. along the first direction), the at least one first detection trace 161 and the at least one second detection trace 162 are disposed on two opposite sides of the display area 101. The number of the at least one first detection trace 101 and the number of the at least one second detection trace 102 are equal. The detection point 21 includes a first detection point 211 and a second detection point 212, the first detection line 161 and the power line 12 are electrically connected to the first detection point 211, and the second detection line 162 and the power line 12 are electrically connected to the second detection point 212. Along the extending direction of the data line 17, at least one first detection point 211 and at least one second detection point 212 are alternately arranged. In the embodiment of the invention, the first detecting trace 161 and the second detecting trace 162 have the same number, and the first detecting trace 161 and the second detecting trace 162 are respectively disposed in the non-display area 102 on two opposite sides of the display area 101, so that the detecting trace 16 occupies the left and right frames with the same area, the difficulty in disposing the detecting trace 16 is reduced, and the aesthetic property of the display panel is improved.
Alternatively, referring to fig. 2, fig. 6, fig. 7 and fig. 8, the detecting pins 151 are located on a side of the driving chip body away from the display area 101. That is, the detecting pin 151 is disposed away from the display area 101. The main body of the driving chip is a main body portion of the driving chip 15, specifically, a portion of the driving chip 15 except the detecting pins 151. The detection trace 16 is electrically connected to the power line 12 from the detection pin 151 through the substrate 11, the flexible circuit board 14 and the substrate 11 in sequence. In the embodiment of the present invention, the detection traces 16 are disposed in the space on the flexible circuit board 14, so that the difficulty of disposing the detection traces 16 can be reduced.
For example, referring to fig. 2, 6, 7 and 8, the driving chip 15 is bonded on the substrate 11 in the non-display region 102, and the detecting pins 151 are located on a side of the driving chip body away from the display region 101. Since the space between the driving chip 15 and the flexible circuit board 14 is limited, when the detection pins 151 are disposed away from the display region 101, the detection traces 16 can be disposed by using the space on the flexible circuit board 14, so that the detection traces 16 can be disposed to be electrically connected to the power line 12 after passing through the substrate 11, the flexible circuit board 14 and the substrate 11 in sequence from the detection pins 151, thereby reducing the wiring difficulty of the detection traces 16.
Fig. 9 is a schematic top view of another display module according to an embodiment of the present invention, referring to fig. 9, the driving chip 15 is bonded on the substrate 11 in the non-display area 102, and the detecting pins 151 are located on a side of the driving chip body close to the display area 101. That is, the detecting pins 151 are disposed toward the display region 101. The detection trace 16 is located on the substrate 11. In the embodiment of the present invention, the driving chip 15 is bound on the substrate 11 in the non-display area 102, and the detecting pins 151 are disposed toward the display area 101, so that the detecting traces 16 can be disposed on the substrate 11 without being wound around the side of the driving chip 15 facing the display area 101 to the side of the driving chip 15 away from the display area 101, and then disposed on the flexible circuit board 14, thereby reducing the wiring length of the detecting traces 16 and reducing the cost.
Fig. 10 is a schematic top view of another display module according to an embodiment of the present invention, and referring to fig. 10, at least one flexible circuit board 14 includes a first flexible circuit board 141 and a second flexible circuit board 142, the second flexible circuit board 142 is bonded to the substrate 11 in the non-display area 102, the driving chip 15 is bonded to the second flexible circuit board 142, and the first flexible circuit board 141 is bonded to an end of the second flexible circuit board 142 away from the power line 12. The detecting pins 151 are located on one side of the driving chip 15 close to the display area 101, and the detecting traces 16 are electrically connected to the power line 12 through the second flexible circuit board 142 and the substrate 11. In the embodiment of the invention, since the detecting pins 151 are disposed toward the display area 101, the detecting traces 16 can be disposed on the substrate 11 and the second flexible circuit board 142, and the detecting traces 16 do not need to be disposed on the first flexible circuit board 141 after being wound from the side of the driving chip 15 facing the display area 101 to the side of the driving chip 15 deviating from the display area 101, thereby reducing the length of the detecting traces 16 and reducing the cost.
Fig. 11 is a schematic top view of another display module according to an embodiment of the present invention, and referring to fig. 11, at least one flexible circuit board 14 includes a first flexible circuit board 141 and a second flexible circuit board 142, the second flexible circuit board 142 is bonded to the substrate 11 in the non-display area 102, the driving chip 15 is bonded to the second flexible circuit board 142, and the first flexible circuit board 141 is bonded to an end of the second flexible circuit board 142 away from the power line 12. The detection trace 16 is electrically connected to the power line 12 from the detection pin 151 through the second flexible circuit board 142, the first flexible circuit board 141, the second flexible circuit board 142 and the substrate 11 in sequence. Since the process requirement for binding the driver chip 15 to the flexible circuit board is very high, most of the second flexible circuit boards 142 for binding the driver chip 15 are single-layer metal layer flexible circuit boards, and the second flexible circuit boards 142 made of multiple metal layers are very expensive. In the embodiment of the present invention, to avoid the trace cross electrical connection on the second flexible circuit board 142, only the portion of the detection trace 16 extending along the second direction is disposed on the second flexible circuit board 142, and the portion of the detection trace 16 extending along the first direction is disposed by using the first flexible circuit board 141. Using the second flexible circuit board 142 having a single metal layer reduces costs relative to using the second flexible circuit board 142 having a plurality of metal layers.
Fig. 12 is a schematic top view of another display module according to an embodiment of the invention, and referring to fig. 12, at least one detection trace 16 is located in the display area 101 (fig. 12 illustrates one detection trace 16, which is not a limitation of the invention). In the embodiment of the invention, at least one detection trace 16 is located in the display area 101, so that the number of wirings in the non-display area 102 is reduced, and the frame is reduced.
For example, referring to fig. 12, all the detecting traces 16 are located in the display area 101, and the detecting pins 151 are located on a side of the driving chip body close to the display area 101. In other embodiments, it is also possible to provide: all the detecting traces 16 are located in the display area 101, and the detecting pins 151 are located on a side of the driving chip body away from the display area 101.
Fig. 13 is a schematic cross-sectional structure view of another display module according to an embodiment of the invention, and referring to fig. 13, the sub-pixel 13 includes a pixel driving circuit 18 and a light emitting device 19, the pixel driving circuit 18 is electrically connected to the power line 12, and the pixel driving circuit 18 is located between the light emitting device 19 and the substrate 11. The light-emitting element 19 includes an anode 193, a light-emitting medium layer 192, and a cathode 191, the anode 193 being located between the light-emitting medium layer 192 and the substrate 11, and the light-emitting medium layer 192 being located between the anode 193 and the cathode 191. The detection trace 16 and the anode 193 are disposed on the same layer. In the embodiment of the invention, the detecting trace 16 and the anode 193 are disposed at the same layer, and the detecting trace 16 and the anode 193 can be formed by the same material and in the same process, thereby saving the process.
Exemplarily, referring to fig. 13, the pixel driving circuit 18 includes a thin film transistor, which may be, for example, the driving transistor T2 shown in fig. 1, including a source electrode 181, a semiconductor layer 182, a gate electrode 183, and a drain electrode 184, the drain electrode 184 of the thin film transistor being electrically connected to the anode electrode 193 for supplying a data signal to the anode electrode 193. The pixel drive circuit 18 may further include elements such as a switching transistor T1 and a storage capacitor Cs as shown in fig. 1. The light emitting element 19 may be, for example, an organic light emitting diode OLED shown in fig. 1.
Fig. 14 is a schematic top view of another display module according to an embodiment of the invention, fig. 15 is a schematic cross-sectional view along the direction CC' in fig. 14, for clarity, structures such as the data line 17 and the power line 12 are omitted in fig. 14, and referring to fig. 14 and fig. 15, the display module further includes a plurality of touch electrodes 24 and a plurality of touch signal lines 25, each touch signal line 25 is electrically connected to one touch electrode 24. The detection trace 16 and the touch signal line 25 are disposed on the same layer. In the embodiment of the invention, the detection trace 16 and the touch signal line 25 are disposed on the same layer, and the detection trace 16 and the touch signal line 25 can be formed by the same material in the same process, thereby saving the process.
For example, referring to fig. 14 and fig. 15, the display module includes a plurality of touch electrodes 24, the touch electrodes 24 are disposed in a same layer and arranged in a matrix, the touch electrodes 24 are self-capacitive touch electrodes, in other embodiments, the touch electrodes 24 may also be mutual capacitive touch electrodes, which is not limited in this embodiment of the present invention. The touch electrodes 24 and the touch signal lines 25 are disposed in different layers, and the touch electrodes 24 and the touch signal lines 25 are electrically connected through via holes, in other embodiments, the touch electrodes 24 and the touch signal lines 25 may also be disposed in the same layer.
Fig. 16 is a schematic top view of another display module according to an embodiment of the invention, fig. 17 is a schematic cross-sectional view along the direction DD' in fig. 16, and for clarity, structures such as the power line 12 are omitted from fig. 16, referring to fig. 16 and fig. 17, a plurality of sub-pixels 13 are arranged in a matrix, the display panel further includes a plurality of data lines 17, and each data line 17 is electrically connected to at least a portion of one column of sub-pixels 13. The detection trace 16 and the power line 12 are located on the same metal layer, and in a direction perpendicular to the plane of the substrate 11, the detection trace 16 and the power line 12 are located on a side of the data line 17 away from the substrate 11. In the embodiment of the invention, the detection trace 16 and the power line 12 are disposed on the same metal layer, the detection trace 16 and the power line 12 do not need to be electrically connected through a via, so that the connection difficulty between the detection trace 16 and the power line 12 is reduced, and the detection trace 16 and the power line 12 can be formed by using the same material in the same process, thereby saving the process. In addition, the detection trace 16 and the power line 12 are disposed on the side of the data line 17 away from the substrate 11, the power line 12 and the data line 17 are disposed in different layers, and compared with the case where the power line 12 and the data line 17 are disposed on the same layer, an orthographic projection of the power line 12 on the substrate 11 and an orthographic projection of the data line 17 on the substrate 11 can be disposed closer or even overlapped, and there is no need to reserve too much space between two adjacent sub-pixels 13, thereby increasing the aperture ratio of the display panel.
Exemplarily, referring to fig. 16 and 17, at least a portion of the data line 17 overlaps the power line 12 to further increase the aperture ratio of the display panel. In some possible embodiments, the orthographic projection of the data line 17 on the substrate 11 can be overlapped with the orthographic projection of the power line 12 on the substrate 11.
Alternatively, referring to fig. 16 and 17, the detection trace 16 and the power line 12 are located on the same metal layer, and in a direction perpendicular to the plane of the substrate 11, the detection trace 16 and the power line 12 are located on a side of the data line 17 away from the substrate 11. The plurality of data lines 17 include first data lines 171 and second data lines 172, the first data lines 171 electrically connect the sub-pixels 13 in the odd-numbered rows, and the second data lines 172 electrically connect the sub-pixels 13 in the even-numbered rows. First data lines 171 and second data lines 172 are disposed on both sides of each column of sub-pixels 13. In the embodiment of the present invention, the odd rows of the sub-pixels 13 arranged in the column along the second direction are electrically connected to the first data line 171, and the even rows of the sub-pixels 13 arranged in the column along the second direction are electrically connected to the second data line 172, so that when the first data line 171 applies a data signal to the sub-pixels 13 in the odd rows, the gates of the pixels in the next row are controlled to be turned on, and the sub-pixels 13 in the even rows are pre-charged by the second data line 172. When the second data line 172 applies a data signal to the sub-pixels 13 of the even-numbered row, the sub-pixels 13 of the odd-numbered row may be precharged through the first data line 171. Thereby the condition that the high frequency data line is not charged enough has been solved.
The embodiment of the invention also provides a display device. Fig. 18 is a schematic structural diagram of a display device according to an embodiment of the present invention, and referring to fig. 18, the display device includes any one of the display modules 100 according to the embodiment of the present invention. The display device can be a mobile phone, a tablet computer, an intelligent wearable device and the like.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (14)
1. A display module, comprising:
the display panel comprises a display area and a non-display area arranged around the display area, and further comprises a substrate, a plurality of sub-pixels arranged on the substrate, and a power line, wherein the power line is used for providing power signals for the sub-pixels, and comprises at least one detection point;
at least one flexible circuit board bound on the substrate in the non-display area, wherein the flexible circuit board comprises a power bus which is electrically connected with the power line;
the driving chip comprises at least one detection pin, and the detection pin is positioned on one side of the driving chip body, which is far away from the display area;
one end of the detection wire is electrically connected with the detection pin, and the other end of the detection wire is directly and electrically connected with the detection point of the power line; the detection routing is located in the non-display area and is electrically connected to the power line at least through the flexible circuit board.
2. The display module assembly according to claim 1, wherein the number of the at least one detecting pin is greater than or equal to 2;
the plurality of sub-pixels are arranged in a matrix, the display panel further comprises a plurality of data lines, and each data line is electrically connected with at least part of sub-pixels in the same column of sub-pixels;
at least two of the detection points are sequentially arranged along the extending direction of the data line.
3. The display module of claim 2, wherein the number of the detection points is greater than 2, and the distance between any two adjacent detection points along the extending direction of the data line is equal.
4. The display module according to claim 3, wherein the detecting traces include at least one first detecting trace and at least one second detecting trace, and the at least one first detecting trace and the at least one second detecting trace are disposed on two opposite sides of the display area along a direction perpendicular to an extending direction of the data lines;
the number of the at least one first detection wire and the number of the at least one second detection wire are equal; the detection points comprise first detection points and second detection points, the first detection lines and the power lines are electrically connected with the first detection points, the second detection lines and the power lines are electrically connected with the second detection points, and at least one first detection point and at least one second detection point are alternately arranged along the extension direction of the data lines.
5. The display module as claimed in claim 1, wherein the detection trace is electrically connected to the power line from the detection pin through the substrate, the flexible circuit board and the substrate in sequence.
6. The display module assembly according to claim 1, wherein the at least one flexible circuit board comprises a first flexible circuit board and a second flexible circuit board, the second flexible circuit board is bonded to the substrate in the non-display area, the driving chip is bonded to the second flexible circuit board, and the first flexible circuit board is bonded to an end of the second flexible circuit board away from the power line;
the detection wiring is electrically connected to the power line from the detection pin through the second flexible circuit board, the first flexible circuit board, the second flexible circuit board and the substrate in sequence.
7. The display module of claim 1, further comprising a plurality of touch electrodes and a plurality of touch signal lines, each of the touch signal lines electrically connected to one of the touch electrodes;
the detection wiring and the touch signal line are arranged on the same layer.
8. The display module of claim 1, wherein the line width of the detection trace is greater than or equal to 6 μm.
9. The display module of claim 1, further comprising a bonding pad, wherein the flexible circuit board is bonded to the substrate in the non-display area through the bonding pad.
10. The display module according to claim 1, wherein the plurality of sub-pixels are arranged in a matrix, and the display panel further comprises a plurality of data lines, each of the data lines being electrically connected to at least some of the sub-pixels in the same column;
along the extending direction of the data line, the arrangement density of the detection points is increased along with the increase of the distance from the driving chip; the setting density of the detection points refers to the number of the detection points arranged in a unit length on the power line.
11. The display module of claim 1, wherein the plurality of sub-pixels are arranged in a matrix, the display panel further comprises a plurality of data lines, each data line electrically connects at least some of the sub-pixels in a column;
the detection wiring and the power line are positioned on the same metal layer, and in the direction perpendicular to the plane of the substrate, the detection wiring and the power line are positioned on one side, far away from the substrate, of the data line.
12. The display module of claim 11, wherein the plurality of data lines comprises a first data line and a second data line, the first data line is electrically connected to the sub-pixels in odd-numbered rows, and the second data line is electrically connected to the sub-pixels in even-numbered rows; the first data line and the second data line are arranged on two sides of each column of the sub-pixels.
13. The display module of claim 1, wherein the sub-pixel comprises a pixel driving circuit and a light emitting element, the pixel driving circuit is electrically connected to the power line, and the pixel driving circuit is located between the light emitting element and the substrate;
the light-emitting element comprises an anode, a light-emitting medium layer and a cathode, wherein the anode is positioned between the light-emitting medium layer and the substrate, and the light-emitting medium layer is positioned between the anode and the cathode;
the detection wiring and the anode are arranged on the same layer.
14. A display device comprising the display module according to any one of claims 1 to 13.
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| CN201911012305.3A CN110718577B (en) | 2019-10-23 | 2019-10-23 | Display module and display device |
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| CN201911012305.3A CN110718577B (en) | 2019-10-23 | 2019-10-23 | Display module and display device |
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| CN113589964A (en) * | 2020-04-30 | 2021-11-02 | 京东方科技集团股份有限公司 | Binding circuit board, display device and electrical equipment |
| CN111682031B (en) * | 2020-06-23 | 2024-04-02 | 京东方科技集团股份有限公司 | Display substrate, preparation method thereof and display device |
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| CN111883509A (en) * | 2020-07-30 | 2020-11-03 | 昆山国显光电有限公司 | Display panel |
| CN112102739A (en) * | 2020-09-16 | 2020-12-18 | 武汉华星光电技术有限公司 | Electronic equipment |
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