Display panel and display device

Abstract

The invention provides a display panel and a display device. The display panel comprises a display area and a non-display area; the display area comprises a plurality of light-emitting elements; the non-display area comprises a power signal bus, a control unit and a load unit; the power supply signal line bus is used for providing a power supply voltage signal for the light-emitting element; the control unit is respectively connected with the power supply signal bus and the load unit, and the control unit is used for controlling the connection state between the load unit and the power supply signal bus. According to the invention, the load unit is connected into the power supply signal bus, the voltage output on the power supply signal bus is stabilized, water ripples are effectively displayed and improved, and the display effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of OLED display, and in particular to a display panel and a display device. Background Art

[0002] Organic Light Emitting Diode (OLED) is a current-type light-emitting device. It is now widely used in display devices such as mobile phones and tablets because of its self-luminescence, fast response speed, wide viewing angle and ability to be formed on flexible substrates. It is found in the prior art that when the OLED screen is actually matched with the whole machine for display, water ripples will appear, affecting the display effect of the display panel. Summary of the invention

[0003] In view of the problems in the prior art, an object of the present invention is to provide a display panel and a display device to improve the water ripple phenomenon that occurs when the display panel displays, thereby improving the display effect of the display panel.

[0004] An embodiment of the present invention provides a display panel, including a display area and a non-display area;

[0005] The display area includes a plurality of light emitting elements;

[0006] The non-display area includes a power signal bus, a control unit and a load unit; the power signal bus is used to provide a power voltage signal for the light emitting element;

[0007] The control unit is connected to the power signal bus and the load unit respectively, and the control unit is used to control the connection state between the load unit and the power signal bus.

[0008] In some embodiments, the display panel includes a plurality of load units and a plurality of control units;

[0009] The load units and the control units are connected in a one-to-one correspondence.

[0010] In some embodiments, the display panel further comprises a plurality of load control signal lines, wherein the load control signal lines are electrically connected to the control unit and are used to control a conduction state of the control unit;

[0011] Wherein, the load control signal lines connected to each of the control units are different.

[0012] In some embodiments, the signals transmitted in the load control signal lines connected to the control units are at least partially different.

[0013] In some embodiments, the display panel further includes a load control signal line;

[0014] The control unit includes a switching transistor, the load control signal line is electrically connected to the gate of the switching transistor, a first electrode of the switching transistor is electrically connected to the power signal bus, and a second electrode of the switching transistor is electrically connected to the load unit.

[0015] In some embodiments, the light emitting element includes a first electrode layer, a second electrode layer, and a light emitting layer located between the first electrode layer and the second electrode layer;

[0016] The power signal bus includes a first power signal bus, and the first power signal bus is electrically connected to the first electrode layer;

[0017] The control unit includes a first control unit, and the first control unit is electrically connected to the first power signal bus;

[0018] The load unit includes a first load unit, and the first load unit is electrically connected to the first control unit.

[0019] In some embodiments, the power signal bus includes a second power signal bus, and the second power signal bus is electrically connected to the second electrode layer;

[0020] The control unit includes a second control unit, and the second control unit is electrically connected to the second power signal bus;

[0021] The load unit includes a second load unit, and the second load unit is electrically connected to the second control unit.

[0022] In some embodiments, the first power signal bus transmits a positive voltage signal, and the second power signal bus transmits a negative voltage signal.

[0023] In some embodiments, the display panel further comprises a plurality of load control signal lines, wherein the load control signal lines are electrically connected to the control unit and are used to control a conduction state of the control unit;

[0024] The load control signal lines connected to the first control unit and the second control unit are different.

[0025] In some embodiments, the load unit includes a capacitor or a resistor.

[0026] In some embodiments, the display panel includes a plurality of the load units, the plurality of the load units include at least two capacitors and at least two resistors, the at least two capacitors form a capacitor group, the at least two resistors form a resistor group, and the capacitor group and the resistor group are arranged in parallel.

[0027] In some embodiments, the display panel further includes a driving chip, and the driving chip is electrically connected to the control unit;

[0028] The driving chip is used to obtain the display brightness of the display panel. When the display brightness matches the preset brightness, the driving chip controls the control unit to turn on, so that the load unit is electrically connected to the power signal bus.

[0029] In some embodiments, the driving chip is further used to control the control unit to shut down when the display brightness does not match the preset brightness, so as to disconnect the load unit and the power signal bus.

[0030] In some embodiments, one end of the load unit is connected to the control unit, and the other end is connected to a ground voltage signal.

[0031] In some embodiments, the non-display area includes a bending area located at one side of the display area, and the load unit is located between the bending area and the display area.

[0032] An embodiment of the present invention further provides a display device, comprising the display panel as described above.

[0033] The display panel and display device provided by the present invention have the following advantages:

[0034] The control unit controls the load unit to be electrically connected to the power signal bus. When the load unit is electrically connected to the power signal bus, the load unit can stabilize the voltage signal transmitted on the power signal bus, thereby eliminating the water ripple phenomenon on the display panel and improving the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Other features, objectives and advantages of the present invention will become more apparent from a reading of the detailed description of non-limiting embodiments made with reference to the following accompanying drawings.

[0036] Figure 1 is a circuit diagram of a pixel circuit according to an embodiment of the present invention;

[0037] Figure 2 is a schematic diagram of pixel driving timing according to an embodiment of the present invention;

[0038] Figure 3 is a schematic plan view of a display panel according to an embodiment of the present invention;

[0039] Figure 4 is a schematic diagram of the connection between a control unit, a load unit and a power signal bus according to an embodiment of the present invention;

[0040] Figure 5is a schematic diagram of the connection between a control unit, a load unit, and a power signal bus provided by another embodiment of the present invention;

[0041] Figure 6 is a schematic diagram of the connection between a control unit, a load unit, and a power signal bus provided by another embodiment of the present invention;

[0042] Figure 7 is a schematic diagram of the connection between a control unit, a load unit, and a power signal bus provided by another embodiment of the present invention;

[0043] Figure 8 is a schematic diagram of the connection between a control unit, a load unit, and a power signal bus provided by another embodiment of the present invention;

[0044] Fig. 9 is a schematic diagram of the connection between a control unit, a load unit, and a power signal bus provided by another embodiment of the present invention;

[0045] Fig.10 is a schematic diagram of the connection between a control unit, a load unit, and a power signal bus provided by another embodiment of the present invention;

[0046] Fig.11 is a cross-sectional schematic diagram of a display area of ​​a display panel according to an embodiment of the present invention;

[0047] Fig.12 It is a schematic diagram of the connection between a control unit, a load unit, and a power signal bus provided by another embodiment of the present invention.

[0048] Reference numerals:

[0049] 100 display panel 71 first load unit

[0050] 10 Display area 72 Second load unit

[0051] 20 Non-display area 73 Third load unit

[0052] 21 Bending zone 74 Fourth load unit

[0053] 30 Light-emitting element 80 Driver chip

[0054] 40 Power management chip 90 Load control signal line

[0055] 50 Power signal bus 91 First load control signal line

[0056] 51 First power signal bus 92 Second load control signal line

[0057] 52 Second power signal bus 01 Baseboard

[0058] 60 Control unit 02 Pixel circuit layer

[0059] 61 First control unit 03 Anode layer

[0060] 62 Second control unit 04 light-emitting layer

[0061] 70 Load cell 05 Cathode layer DETAILED DESCRIPTION

[0062] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. In the figures, the same reference numerals represent the same or similar structures, and thus their repeated description will be omitted. "or" and "or" in the specification may both mean "and" or "or".

[0063] The OLED display screen includes light-emitting elements arranged in an array, each of which emits light through a pixel circuit. For example, the structure of the pixel circuit is as follows: Figure 1 As shown, the corresponding pixel driving timing can be as follows Figure 2 As shown. Figure 1 and Figure 2 As shown, M1~M7 are switch transistors (such as thin film transistors), Cst is a storage capacitor; S1N and S2N are scan signals, which are used to turn on the corresponding switch transistors at different stages in the scan sequence to achieve the transmission of the corresponding signal; Emit is the light control signal, Vdata is the data signal, PVDD is the first power supply voltage signal, PVEE is the second power supply voltage signal, Vref1 is the first reference voltage signal, and Vref2 is the second reference voltage signal. Figure 2 and Figure 3 , the transistors M1~M7 can all be switch transistors (for example, P-type transistors) that are turned on at a low level; when S1N is at a low level, corresponding to the initialization stage, the first node N1 and the first end of the OLED are initialized with the first reference voltage signal Vref1 to avoid the influence of the previous frame on the display of the current frame; when S2N is at a low level, corresponding to the data writing and threshold compensation stage, the data signal Vdata is transmitted to the N1 node via the N2 node, the M1 transistor, the N3 node and the M5 transistor. When the threshold voltage of the M1 transistor is written to the first node N1, the M1 transistor is turned off. When this stage is completed, the data signal Vdata and the threshold voltage of the M1 transistor are stored in the storage capacitor Cst; when Emit is at a low level, corresponding to the light-emitting stage, the M1 transistor generates a driving current to drive the OLED to emit light.

[0064] Among them, the scanning signal, the light emitting control signal, the data signal and the power supply voltage signal are all provided based on the corresponding signal lines and connected to the corresponding pixel circuits.

[0065] The inventors have discovered that when the power supply voltage signal (PVEE / PVDD) ripples due to design or other reasons, it will interfere with the internal display signal of the OLED screen, eventually causing the screen brightness to fluctuate and the appearance of rolling light and dark water ripples, affecting the display effect of the display panel.

[0066] In view of this, an embodiment of the present invention provides a display panel, including a display area and a non-display area; the display area includes a plurality of light-emitting elements; the non-display area includes a power signal bus, a control unit and a load unit; the power signal bus is used to provide a power voltage signal for the light-emitting element; the control unit is connected to the power signal bus and the load unit respectively, and the control unit is used to control the connection state between the load unit and the power signal bus. By adding a load unit, the ripples on the power signal bus are eliminated, thereby eliminating the water ripples on the display panel and improving the display effect.

[0067] For example, Figure 3 As shown, the display panel 100 provided in the embodiment of the present invention includes a display area 10 and a non-display area 20, the display area 10 includes a plurality of light-emitting elements 30, and the non-display area 20 includes a power signal bus 50, a control unit 60 and a load unit 70, the power signal bus 50 is used to provide a power voltage signal for the light-emitting element 30; the control unit 60 is respectively connected to the power signal bus 50 and the load unit 70, and the control unit 60 is used to control the connection state between the load unit 70 and the power signal bus 50.

[0068] The present invention sets a control unit 60 and a load unit 70, and the control unit 60 is connected to the power signal bus 50 and the load unit 70 respectively. The control unit 60 controls the connection state between the load unit 70 and the power signal bus 50. In this way, the load unit 70 is added to eliminate the fluctuation of the power signal output to the pixel circuit, so there will be no brightness difference in the frame brightness, thereby eliminating the display water ripples and improving the display effect.

[0069] Here, the light emitting element 30 may be an OLED, a quantum dot light emitting diode (QLED for short), a micro light emitting diode (Micro LED for short), or other elements having a light emitting function.

[0070] Furthermore, if Figure 4As shown, the display panel 100 further includes a driver chip 80, and the driver chip 80 is electrically connected to the control unit 60. The driver chip 80 is used to obtain the display brightness of the display panel 100. When the display brightness matches the preset brightness, the control unit 60 is controlled to be turned on so that the load unit 70 and the power signal bus 50 are electrically connected to eliminate the ripple of the electrical signal transmitted by the power signal bus 50. In other embodiments, the driver chip 80 is used to control the control unit 60 to be turned off when the display brightness does not match the preset brightness, so that the load unit 70 and the power signal bus 50 are disconnected.

[0071] When displaying different brightness, the display panel 100 will adjust the size of PVDD and PVEE accordingly to reduce the display power consumption of the display panel 100 when displaying. At some display brightness, when the adjusted size of PVDD and PVEE is output, the output PVDD and PVEE will have certain fluctuations. Therefore, the display brightness of the display panel is related to the fluctuation of PVDD and PVEE. Before the display panel leaves the factory, some brightnesses where ripples may occur can be preset in the panel, that is, scenes where ripples may occur. In view of this, the display brightness of the display panel 100 can be detected by the driver chip 80 to determine whether the current display panel 100 will have water ripples, and then the load unit 70 can be controlled to be connected to the power signal bus 50, so as to stabilize the PVDD and PVEE output on the power signal bus 50, which can effectively improve the water ripple phenomenon caused by the fluctuation of PVDD and PVEE on the display panel.

[0072] Furthermore, if Figure 4 and Figure 5 As shown, the display panel 100 also includes a load control signal line 90, the control unit 60 includes a switching transistor T0, the load control signal line 90 is electrically connected to the gate of the switching transistor T0, the first electrode of the switching transistor T0 is electrically connected to the power signal bus 50, and the second electrode of the switching transistor T0 is electrically connected to the load unit 70.

[0073] The switching transistor T0 includes a gate, a first electrode and a second electrode, the first electrode is also referred to as one of the source or the drain, and the second electrode is the other of the source or the drain. When the gate is provided with a working level, the first electrode and the second electrode are turned on, that is, the transistor is turned on; when the gate is provided with a non-working level, the first electrode and the second electrode are disconnected, that is, the transistor is turned off. Transistors can be divided into P-type transistors and N-type transistors according to their conductive characteristics. The P-type transistor is turned on when the gate is at a low level and is turned off when the gate is at a high level, that is, the working level of the P-type transistor is a low level, and the non-working level of the P-type transistor is a high level; the N-type transistor is turned on when the gate is at a high level and is turned off when the gate is at a low level, that is, the working level of the N-type transistor is a high level, and the non-working level of the N-type transistor is a low level. In the embodiment of the present invention, the function of the control unit 60 is explained by taking the switching transistor as a P-type transistor. However, the specific type of the switching transistor T0 is not limited to a P-type transistor.

[0074] Please continue reading Figure 5 When the load control signal line 90 transmits a high-level working signal, the switch transistor T0 is turned on, and the power signal bus 50 is electrically connected to the load unit 70. When the load control signal line 90 transmits a low-level working signal, the switch transistor T0 is turned off, and the power signal bus 50 is disconnected from the load unit 70.

[0075] like Figures 4 to 12 As shown, in some embodiments, one end of the load unit 70 is connected to the control unit 60, and the other end is connected to the ground voltage signal.

[0076] like Figures 6 to 8 As shown, in some embodiments, the load unit 70 includes a capacitor or a resistor. Figure 6 As shown, the load unit 70 includes a resistor R, one end of which is connected to the control unit 60, and the other end of which is connected to the ground voltage signal. When the resistor R is connected to the power signal bus 50, it can be used to stabilize the voltage signal (PVDD or PVEE) output by the power signal bus 50, thereby improving the water ripple phenomenon caused by the voltage signal fluctuation of the display panel 100.

[0077] like Figure 7 As shown, in another embodiment, the load unit 70 includes a capacitor C, one end of the capacitor C is connected to the control unit 60, and the other end of the capacitor C is connected to the ground voltage signal. When the capacitor C is connected to the power signal bus 50, it can be used to stabilize the voltage signal (PVDD or PVEE) output by the power signal bus 50, thereby improving the water ripple phenomenon of the display panel 100 due to the fluctuation of the voltage signal.

[0078] like Figure 8As shown, in another embodiment, the display panel 100 includes a first load unit 71 and a second load unit 72, the first load unit 71 is a capacitor C, the second load unit 72 is a resistor R, wherein the capacitor C and the resistor R are connected in parallel, and the capacitor C and the resistor R form an RC circuit. When the RC circuit is connected to the power signal bus 50, it can be used to stabilize the voltage signal (PVDD or PVEE) output by the power signal bus 50, thereby improving the water ripple phenomenon caused by the voltage signal fluctuation of the display panel 100.

[0079] like Fig. 9 As shown, in some other embodiments, the display panel 100 includes a plurality of load units 70, the plurality of load units 70 include at least two capacitors and at least two resistors, at least two capacitor groups form a capacitor group, at least two resistors form a resistor group, and the capacitor group and the resistor group are arranged in parallel. Fig. 9 As shown, the display panel 100 includes a first load unit 71, a second load unit 72, a third load unit 73 and a fourth load unit 74, the first load unit 71 is a capacitor C1, the second load unit 72 is a capacitor C2, the third load unit 73 is a resistor R1, the fourth load unit 74 is a resistor R2, two capacitors form a capacitor group, two resistors form a resistor group, and the capacitor group and the resistor group are arranged in parallel. The number of capacitors and resistors in the load unit 70 is not limited to the number in the above embodiment. In some embodiments, the number of capacitors in the capacitor group may also be greater than 2, the number of resistors in the resistor group may also be greater than 2, and the number of capacitor groups and resistor groups may also be greater than 2. A larger number of capacitors and resistors facilitates flexible selection of corresponding capacitors or resistors and a combination of the two during debugging, so as to better solve the water ripple phenomenon when the display panel is displayed.

[0080] like Fig.10 As shown, in some embodiments, the display panel 100 includes a plurality of load units 70 and a plurality of control units 60, and the load units 70 are connected to the control units 60 in a one-to-one correspondence. Fig.10 As shown, the number of control units 60 is 2, which are shown as a first control unit 61 and a second control unit 62, and the number of load units 70 is 2, which are shown as a first load unit 71 and a second load unit 72. The first control unit 61 is electrically connected to the first load unit 71, and the second control unit 62 is electrically connected to the second load unit 72. The corresponding control unit 60 controls the corresponding load unit 70 to be connected to the power signal bus 50.

[0081] like Fig.10As shown, in some embodiments, the display panel 100 further includes a plurality of load control signal lines 90, which are electrically connected to the control unit 60 and are used to control the conduction state of the control unit 60; wherein the load control signal lines 90 connected to each control unit 60 are different. For example, Fig.10 As shown, there are two load control signal lines 90, which are shown as a first load control signal line 91 and a second load control signal line 92. The first load control signal line 91 is connected to the first control unit 61, and the second load control signal line 92 is connected to the second control unit 62. The first load control signal transmitted by the first load control signal line 91 is used to control the conduction of the first control unit 61, so as to connect the first load unit 71 to the power signal bus 50. The second load control signal transmitted by the second load control signal line 92 is used to control the conduction of the second control unit 62, so as to connect the second load unit 72 to the power signal bus 50.

[0082] In some embodiments, the signals transmitted in the load control signal lines 90 connected to the control units 60 are at least partially different. Fig.10 As shown, the first load control signal line 91 transmits a first load control signal, and the second load control signal line 92 transmits a second load control signal. When the first load control signal and the second load control signal are different, the first load unit 71 and the second load unit 72 are not simultaneously connected to the power signal bus 50. When the first load control signal and the second load control signal are the same, the first load unit 71 and the second load unit 72 can be simultaneously connected to the power signal bus 50.

[0083] The specific number of the control unit 60, the load unit 70 and the load control signal line 90 can be set according to actual needs, and is not limited to Fig.10 The restrictions in the control unit 60 and the transmission signals in the load control signal line 90 connected to the control unit 60 can be the same or different and can be set according to actual needs.

[0084] like Figure 1 As shown, the power supply voltage signal can be provided by a power management chip 40 (Power Management IC, PMIC), and transmitted to the pixel circuit through a power supply signal bus 50, wherein the power supply signal bus 50 includes a first power supply signal bus 51 and a second power supply signal bus 52, the first power supply signal bus 51 transmits a positive voltage signal (i.e., a first power supply voltage signal PVDD), and the second power supply signal bus 52 transmits a negative voltage signal (i.e., a second power supply voltage signal PVEE). Please continue to refer to Figure 1In some embodiments, the non-display area 20 includes a bending area 21 located on one side of the display area 10, and the load unit 70 is located between the bending area 21 and the display area 10. The load unit 70 is disposed between the bending area 21 and the display area 10, and the load unit 70 is closest to the power management chip 40. Accordingly, the load unit 70 is closest to the power signal bus 50. When the load unit 70 is electrically connected to the power signal bus 50, the load unit 70 at this position eliminates the ripple on the power signal bus 50 quickly, and the suppression effect on the ripple on the power signal bus 50 is relatively optimal.

[0085] Combination Figure 3 , Fig.11 and Fig.12 As shown, in some embodiments, the display panel 100 includes a first electrode layer 03, a second electrode layer 05, and a light-emitting layer 04 located between the first electrode layer 03 and the second electrode layer 05; the power signal bus 50 includes a first power signal bus 51, and the first power signal bus 51 is electrically connected to the first electrode layer;

[0086] The control unit 60 includes a first control unit 61 , which is electrically connected to the first power signal bus 51 ; the load unit 70 includes a first load unit 71 , which is electrically connected to the first control unit 61 .

[0087] When the first power supply voltage signal PVDD outputted from the power management chip 40 generates ripples, the first control unit 61 responds to the indication that the first power supply voltage signal PVDD generates ripples, and electrically connects the load unit 70 to the first power supply signal bus 51. The load unit 70 can eliminate the ripples generated by the PVDD, so that the PVDD outputted to the pixel circuit is stable, thereby eliminating the water ripples that appear when the display panel 100 is displayed. Here, the indication that the first power supply voltage signal PVDD generates ripples is a turn-on signal that turns on the first control unit 61.

[0088] Please continue reading Figure 3 , Fig.11 and Fig.12 In some embodiments, the power signal bus 50 includes a second power signal bus 52, and the second power signal bus 52 is electrically connected to the second electrode layer 05;

[0089] The control unit 60 includes a second control unit 62, and the second control unit 62 is electrically connected to the second power signal bus 52;

[0090] The load unit 70 includes a second load unit 72 , and the second load unit 72 is electrically connected to the second control unit 62 .

[0091] When the second power supply voltage signal PVEE generates ripples, the second control unit 62 responds to the indication that the second power supply voltage signal PVEE generates ripples, and electrically connects the load unit 70 to the second power supply signal bus 52. The load unit 70 can eliminate the ripples generated by PVEE, so that the PVEE output to the pixel circuit is stable, thereby eliminating the water ripples that appear when the display panel 100 is displayed. Here, the indication that the second power supply voltage signal PVEE generates ripples is a turn-on signal that turns on the second control unit 62.

[0092] like Fig.12 As shown, in some embodiments, the display panel 100 further includes a plurality of load control signal lines 90, which are electrically connected to the control unit 60 and are used to control the conduction state of the control unit 60; wherein the first control unit 61 and the second control unit 62 are connected to different load control signal lines. For example, Fig.12 As shown, the display panel 100 includes two load control signal lines 90, which are shown as a first load control signal line 91 and a second load control signal line 92, wherein the first load control signal line 91 is electrically connected to the first control unit 61, and the first load control signal line 91 transmits a first load control signal to control the first control unit 61 to be turned on, so as to connect the first load unit 71 to the first power signal bus 51, and eliminate the ripple of the PVDD voltage; the second load control signal line 92 is electrically connected to the second control unit 62, and the second load control signal line 92 transmits a second load control signal to control the second control unit 62 to be turned on, so as to connect the second load unit 72 to the second power signal bus 52, and eliminate the ripple of the PVEE voltage.

[0093] Please continue reading Fig.11 The display panel 100 includes a pixel circuit layer 02, a first electrode layer 03, a light-emitting layer 04 and a second electrode layer 05 which are sequentially stacked on one side of a substrate 01, wherein the light-emitting layer 04 forms an array-arranged light-emitting element 30, the first electrode layer 03 is an anode layer, and the second electrode layer 05 is a cathode layer. The anode layer provides a positive voltage to the light-emitting layer 04, and the cathode layer provides a negative voltage to the light-emitting layer 04 to drive the light-emitting layer 04 to emit light.

[0094] The embodiment of the present invention also provides a display device, including the display panel as described above. The display device can achieve all the technical effects of the above-mentioned display panel, which will not be repeated here. Specifically, the display device can be any device that displays images, whether moving (e.g., video) or fixed (e.g., still images), and whether text or images. More specifically, it is expected that the embodiments can be implemented in or associated with a variety of electronic devices. The various electronic devices are, for example (but not limited to), mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, video cameras, game consoles, watches, clocks, calculators, television monitors, flat panel displays, computer monitors, car displays, electronic photos, electronic billboards or signs, projectors, architectural structures, packaging, and aesthetic structures.

[0095] In summary, the display panel and display device provided by the present invention have the following advantages:

[0096] The control unit controls the load unit to be electrically connected to the power signal bus. When the load unit is electrically connected to the power signal bus, the load unit can stabilize the voltage signal transmitted on the power signal bus, thereby eliminating the water ripple phenomenon on the display panel and improving the display effect of the display panel.

[0097] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A display panel, characterized in that: Includes display area and non-display area; The display area includes a plurality of light emitting elements; The non-display area includes a power signal bus, a control unit and a load unit; the power signal bus is used to provide a power voltage signal for the light emitting element; The control unit is connected to the power signal bus and the load unit respectively, and the control unit is used to control the connection state between the load unit and the power signal bus.

2. The display panel according to claim 1, characterized in that: The display panel includes a plurality of load units and a plurality of control units; The load units and the control units are connected in a one-to-one correspondence.

3. The display panel according to claim 2, characterized in that: The display panel further comprises a plurality of load control signal lines, wherein the load control signal lines are electrically connected to the control unit and are used to control the conduction state of the control unit; Wherein, the load control signal lines connected to each of the control units are different.

4. The display panel according to claim 3, characterized in that: The signals transmitted in the load control signal lines connected to the control units are at least partially different.

5. The display panel according to claim 1, characterized in that: The display panel also includes a load control signal line; The control unit includes a switching transistor, the load control signal line is electrically connected to the gate of the switching transistor, a first electrode of the switching transistor is electrically connected to the power signal bus, and a second electrode of the switching transistor is electrically connected to the load unit.

6. The display panel according to claim 1, characterized in that: The display panel comprises a first electrode layer, a second electrode layer and a light emitting layer located between the first electrode layer and the second electrode layer; The power signal bus includes a first power signal bus, and the first power signal bus is electrically connected to the first electrode layer; The control unit includes a first control unit, and the first control unit is electrically connected to the first power signal bus; The load unit includes a first load unit, and the first load unit is electrically connected to the first control unit.

7. The display panel according to claim 6, characterized in that: The power signal bus includes a second power signal bus, and the second power signal bus is electrically connected to the second electrode layer; The control unit includes a second control unit, and the second control unit is electrically connected to the second power signal bus; The load unit includes a second load unit, and the second load unit is electrically connected to the second control unit.

8. The display panel according to claim 7, characterized in that: The first power signal bus transmits a positive voltage signal, and the second power signal bus transmits a negative voltage signal.

9. The display panel according to claim 7, characterized in that: The display panel further comprises a plurality of load control signal lines, wherein the load control signal lines are electrically connected to the control unit and are used to control the conduction state of the control unit; The load control signal lines connected to the first control unit and the second control unit are different.

10. The display panel according to claim 1, characterized in that: The load unit includes a capacitor or a resistor.

11. The display panel according to claim 10, characterized in that: The display panel includes a plurality of the load units, and the plurality of the load units include at least two capacitors and at least two resistors. The at least two capacitors form a capacitor group, and the at least two resistors form a resistor group. The capacitor group and the resistor group are arranged in parallel.

12. The display panel according to claim 1, characterized in that: The display panel further comprises a driving chip, and the driving chip is electrically connected to the control unit; The driving chip is used to obtain the display brightness of the display panel. When the display brightness matches the preset brightness, the driving chip controls the control unit to turn on, so that the load unit is electrically connected to the power signal bus.

13. The display panel according to claim 12, characterized in that: The driving chip is further used for controlling the control unit to be turned off when the display brightness does not match the preset brightness, so as to disconnect the load unit and the power signal bus.

14. The display panel according to claim 1, characterized in that: The non-display area includes a bending area located at one side of the display area, and the load unit is located between the bending area and the display area.

15. The display panel according to claim 1, characterized in that: One end of the load unit is connected to the control unit, and the other end is connected to a ground voltage signal.

16. A display device, characterized in that: Comprising a display panel as described in any one of claims 1-15.

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