Display panel and display device

Abstract

The invention provides a display panel and a display device, and relates to the technical field of display, the display panel comprises light-emitting elements and pixel circuits connected with the light-emitting elements, a first light-emitting element in the light-emitting elements is electrically connected with a first pixel circuit in the pixel circuits, and a second light-emitting element in the light-emitting elements is electrically connected with a second pixel circuit in the pixel circuits; the pixel circuit comprises a driving transistor and a first light-emitting control transistor, a first electrode of the driving transistor is coupled with a first power supply end, a second electrode of the driving transistor is coupled with a first electrode of a light-emitting element through the first light-emitting control transistor, and a second electrode of the light-emitting element is coupled with a second power supply end; in the first pixel circuit and the second pixel circuit, the channel width-to-length ratios of the driving transistors are A1 and A2 respectively, and the channel width-to-length ratios of the first light-emitting control transistors are K1 and K2 respectively; wherein A1 / K1 is not equal to A2 / K2. Therefore, the color cast problem of a display product can be improved, the color uniformity is improved, and the display effect is improved.

Description

Technical Field

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

[0002] With the continuous development of science and technology, more and more display products, such as mobile phones, tablets, laptops and smart wearable devices, are widely used in people's daily life and work, bringing great convenience to people's daily life and work, and becoming an indispensable tool for people today.

[0003] In existing display products, the characteristics of light-emitting elements of different colors vary, resulting in different current uniformity across the different colors. This results in a color cast in the displayed image. Therefore, improving the color cast problem in display products and enhancing display quality has become a pressing technical challenge. Summary of the Invention

[0004] In order to solve the above technical problems, the present disclosure provides a display panel and a display device, aiming to improve color cast and enhance display effects.

[0005] In a first aspect, the present disclosure provides a display panel comprising a light-emitting element and a pixel circuit connected to the light-emitting element, wherein the light-emitting element comprises a first light-emitting element and a second light-emitting element, and the first light-emitting element and the second light-emitting element emit different colors; the pixel circuit comprises a first pixel circuit and a second pixel circuit, the first pixel circuit is electrically connected to the first light-emitting element, and the second pixel circuit is electrically connected to the second light-emitting element;

[0006] The pixel circuit includes a driving transistor and a first light-emitting control transistor, wherein a first electrode of the driving transistor is coupled to a first power supply terminal, a second electrode of the driving transistor is coupled to a first electrode of a light-emitting element via the first light-emitting control transistor, and a second electrode of the light-emitting element is coupled to a second power supply terminal;

[0007] In the first pixel circuit, the channel width-to-length ratio of the driving transistor is A1, and the channel width-to-length ratio of the first light-emitting control transistor is K1; in the second pixel circuit, the channel width-to-length ratio of the driving transistor is A2, and the channel width-to-length ratio of the first light-emitting control transistor is K2; wherein, A1 / K1≠A2 / K2.

[0008] In a second aspect, based on the same inventive concept, the present disclosure provides a display device, comprising the display panel provided in the first aspect of the present disclosure.

[0009] The technical solution provided by the embodiments of the present disclosure has the following advantages over the prior art:

[0010] In the display panel and display device provided by the embodiments of the present disclosure, the channel width-to-length ratio of the driving transistor in the first pixel circuit is A1, and the channel width-to-length ratio of the first light-emitting control transistor is K1; in the second pixel circuit, the channel width-to-length ratio of the driving transistor is A2, and the channel width-to-length ratio of the first light-emitting control transistor is K2; wherein A1 / K1≠A2 / K2. The driving transistor operates in the saturation region, and its channel width-to-length ratio A directly affects the output capacity of the driving transistor. The first light-emitting control transistor operates in the linear region, and by adjusting the width-to-length ratio K of the first light-emitting control transistor, the on-resistance of the first light-emitting control transistor can be changed, thereby changing the voltage drop it shares. Therefore, in the embodiments of the present disclosure, by setting different A / K ratios for pixel circuits of at least two different color light-emitting elements, the voltage drops of the driving transistor and the first light-emitting control transistor in the light-emitting branch can be more finely distributed during the design stage. For example, for light-emitting elements with lower operating voltages, the ratio of A to K can be appropriately adjusted so that the voltage drop shared by the driving transistor or the first light-emitting control transistor can reduce the voltage division difference of the driving transistor, thereby enabling light-emitting elements of different colors to achieve closer actual light-emitting currents under the same grayscale drive signal, thereby significantly improving the current uniformity of light-emitting elements of different colors and effectively alleviating the color cast problem. The disclosed embodiments can configure customized driving transistor and first light-emitting control transistor size ratios for each color pixel circuit during the design phase based on the characteristics of different light-emitting elements, so that the pixel circuit can better adapt to the needs of different light-emitting elements, thereby facilitating improved overall display uniformity and color accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0012] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0013] Figure 1 FIG2 is a schematic plan view of a display panel provided by an embodiment of the present disclosure;

[0014] Figure 2 FIG. 1 is a circuit diagram of a pixel circuit provided by an embodiment of the present disclosure;

[0015] Figure 3 Shown Figure 2 A timing diagram of a pixel circuit in FIG.

[0016] Figure 4 The figure shows the voltage division of the driving transistor in the pixel circuit of different light-emitting elements;

[0017] Figure 5 The figure shows the voltage division of the driving transistor in the pixel circuit of different light-emitting elements after considering the influence of voltage drop;

[0018] Figure 6 FIG2 shows a layout diagram of a pixel circuit provided by an embodiment of the present disclosure;

[0019] Figure 7 Shown Figure 6 A schematic diagram of a layout of the active layer in the circuit;

[0020] Figure 8 Shown in Figure 7 A schematic diagram of a layout after adding a gate metal layer on the basis of FIG;

[0021] Figure 9 Shown Figure 6 Another schematic diagram of the layout of the active layer in the circuit;

[0022] Figure 10 FIG2 shows another layout diagram of a pixel circuit provided by an embodiment of the present disclosure;

[0023] Figure 11 Shown Figure 10 A schematic diagram of a layout of the active layer in the circuit;

[0024] Figure 12 FIG2 shows another layout diagram of a pixel circuit provided by an embodiment of the present disclosure;

[0025] Figure 13 Shown Figure 12 A schematic diagram of a layout of the active layer in the circuit;

[0026] Figure 14 Shown in Figure 13 A schematic diagram of a layout after adding a gate metal layer on the basis of FIG;

[0027] Figure 15 Shown is a structural schematic diagram of a display device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0028] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features therein can be combined with each other in the absence of conflict.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0030] Figure 1 FIG. 1 is a schematic plan view of a display panel provided by an embodiment of the present disclosure. Figure 2 FIG. 1 is a circuit diagram of a pixel circuit provided by an embodiment of the present disclosure. It should be noted that: Figure 1 The rectangular display panel is used as an example for illustration only, and the actual shape of the display panel is not limited. In some other embodiments of the present disclosure, the display panel can also be embodied in any other feasible shape, such as a circle, a rounded rectangle, etc. Optionally, the display panel provided in this embodiment can be a Micro LED display panel or a Mini LED display panel, in which case the corresponding light-emitting element is a Micro LED or Mini LED. In some other embodiments of the present disclosure, the display panel can also be embodied in an organic light-emitting display panel, and the corresponding light-emitting element is an organic electroluminescent element, which is not limited in this disclosure.

[0031] Please refer to Figure 1 and Figure 2 An embodiment of the present disclosure provides a display panel, including a light-emitting element D0 and a pixel circuit P connected to the light-emitting element D0, wherein the light-emitting element D0 includes a first light-emitting element D01 and a second light-emitting element D02, and the first light-emitting element D01 and the second light-emitting element D02 have different luminous colors; the pixel circuit P includes a first pixel circuit P1 and a second pixel circuit P2, the first pixel circuit P1 is electrically connected to the first light-emitting element D01, and the second pixel circuit P2 is electrically connected to the second light-emitting element D02.

[0032] The pixel circuit P includes a driving transistor M3 and a first light-emitting control transistor M6, wherein a first electrode of the driving transistor M3 is coupled to the first power supply terminal PVDD, a second electrode of the driving transistor M3 is coupled to the first electrode of the light-emitting element D0 through the first light-emitting control transistor M6, and a second electrode of the light-emitting element D0 is coupled to the second power supply terminal PVEE.

[0033] In the first pixel circuit P1, the channel width-to-length ratio of the driving transistor M3 is A1, and the channel width-to-length ratio of the first light-emitting control transistor M6 is K1; in the second pixel circuit P2, the channel width-to-length ratio of the driving transistor M3 is A2, and the channel width-to-length ratio of the first light-emitting control transistor M6 is K2; wherein, A1 / K1≠A2 / K2.

[0034] It should be noted that the specific circuit structures of the first pixel circuit P1 and the second pixel circuit P2 mentioned in the embodiment of the present disclosure can refer to Figure 2 .by Figure 2 For example, the pixel circuit P includes transistors M1 to M7 and a capacitor C, wherein the gate, first electrode, and second electrode of the driving transistor M3 are connected to the first node N1, the second node N2, and the third node N3, respectively. The first electrode and second electrode of the transistor M5 are connected to the gate reset signal terminal Vref1 and the first node N1, respectively, and the gate is connected to the first control signal terminal SCAN1 for receiving the reset control signal. The transistor M5 is used to provide the gate reset signal Vref1 to the first node N1. The first electrode and second electrode of the transistor M2 are connected to the data voltage signal terminal Vdata and the second node N2, respectively, and the gate receives the control signal SCAN2. The transistor M2 is used to transmit the data voltage signal Vdata to the second node N2. It should be noted that in the embodiments of the present disclosure, the signal terminal and the signal transmitted by the signal terminal are represented by the same reference numerals. The first electrode and second electrode of the transistor M4 are connected to the third node N3 and the first node N1, respectively, and the gate is connected to the second control signal terminal SCAN2. The transistor M4 is used to perform threshold compensation for the driving transistor M3. The first and second electrodes of transistor M7 are respectively connected to the anode reset signal terminal Vref2 and the first electrode of light-emitting element D0, and the gate is connected to the control signal terminal SCAN2. Transistor M7 is used to reset the first electrode (e.g., the anode) of light-emitting element D0. The first and second electrodes of transistor M1 are respectively connected to the first power supply terminal PVDD and the second node N2, and the gate is connected to the emission control signal terminal Emit. The first and second electrodes of the first emission control transistor M6 are respectively connected to the third node N3 and the first electrode of light-emitting element D0, and the gate is connected to the emission control signal terminal Emit, for transmitting the driving current to light-emitting element D0. The second electrode of light-emitting element D0 receives the second power supply terminal PVEE.

[0035] It should be noted that Figure 2 The pixel circuit in the figure is only for illustration, and the present disclosure does not limit the specific structure of the pixel circuit. Figure 2 In this embodiment, transistors M1 to M7 are all P-type transistors, and transistor M4 and transistor M5 connected to the first node N1 each include two sub-transistors. This helps reduce leakage current from transistors M4 and M5 to the first node N1, thereby helping to maintain the stability of the potential of the gate of the driving transistor M3 connected to the first node N1. In some other embodiments of the present disclosure, transistors M4 and M5 may also be N-type transistors, which may be oxide transistors. This also helps reduce leakage current from the fourth transistor M4 and the fifth transistor M5 to the first node N1, thereby helping to maintain the stability of the potential of the gate of the driving transistor connected to the first node N1.

[0036] The following will be combined Figure 3 right Figure 2The working principle of Figure 3 Shown Figure 2 A timing diagram of a pixel circuit in FIG. 1 , wherein the pixel circuit includes an initialization phase t1 , a data writing and threshold compensation phase t2 , and a light emitting phase t3 .

[0037] In the initialization stage t1 , the low potential signal of the first control signal SCAN1 controls the transistor M5 to be turned on, and transmits the gate reset signal Vref1 to the gate of the driving transistor M3 for initialization, thereby eliminating the residual charge of the previous frame and improving the display effect of the display panel.

[0038] During the data writing and threshold compensation phase t2, the second control signal SCAN2 turns on transistor M2, and the second control signal SCAN2 turns on transistor M4. The data voltage signal Vdata is written into the driving transistor M3 via transistor M2. Transistor M4 is connected between the gate of the driving transistor M3 and the first electrode, capturing the threshold voltage of the driving transistor M3 and applying it to the gate of the driving transistor M3, thus achieving threshold voltage compensation and self-compensating for any deviation in the threshold voltage of the driving transistor. Simultaneously, the second control signal SCAN2 turns on transistor M7, and the anode reset signal Vref2 is transmitted to the anode of the light-emitting element D0 via transistor M7, resetting the light-emitting element D0.

[0039] In the light emitting stage t3, the transistors M2, M4, M5 and M7 are all turned off, the transistor M1, the driving transistor M3 and the first light emitting control transistor M6 are all turned on, the driving current is transmitted to the first electrode of the light emitting element D0, and the light emitting element D0 emits light. It should be noted that Figure 3 The timing diagram is for illustration only and is not intended to be limiting. In some other embodiments of the present disclosure, pixel circuits with different structures may correspond to different timings.

[0040] Please continue to refer to Figure 2 and Figure 3During the light-emitting phase, transistor M1, driving transistor M3, and first light-emitting control transistor M6 are turned on to form a light-emitting branch. In related art, light-emitting elements D0 of different colors are all driven by the same pixel circuit, and different pixel circuits share the first power supply terminal PVDD and the second power supply terminal PVEE. Therefore, for the pixel circuits corresponding to different light-emitting elements D0, during the light-emitting phase, the voltage across the light-emitting branch is the same, namely, PVDD-PVEE. In the light-emitting branch, transistor M1 and first light-emitting control transistor M6 act as switching elements and operate in the linear region. The Vds corresponding to transistor M1 in different pixel circuits can be considered the same, and the Vds corresponding to first light-emitting control transistor M6 in different pixel circuits can also be considered the same. The driving transistor M3 operates in the saturation region. Considering the material of the light-emitting element D0 itself, the corresponding turn-on voltages (conduction voltages) of light-emitting elements D0 of different colors are different or not completely the same. Assuming that the turn-on voltage of the light-emitting element D0 is Vd0, in the light-emitting branch, Vd0 = (PVDD-PVEE)-Vds(M1)-Vds(M3)-Vds(M6). After removing the influence of Vds(M1) and Vds(M6), when the turn-on voltage Vd0 of the light-emitting element D0 is low, its corresponding Vds(M3) will be relatively large. When the turn-on voltage Vd0 of the light-emitting element D0 is high, its corresponding Vds(M3) will be relatively small. For example, please refer to Figure 4 , Figure 4 The diagram shows the voltage division of the driving transistor in the pixel circuit for different light-emitting elements D0. R, G, and B represent the curves corresponding to the three different color light-emitting elements D0, id represents the current, and vds represents the voltage division of the driving transistor M3. The voltage division of the driving transistor M3 for the three color light-emitting elements varies. The voltage division of the driving transistor M3 for the red light-emitting element is the largest, and differs significantly from the voltage division of the driving transistors for the green and blue light-emitting elements. This difference in the voltage division of the driving transistor M3 affects the uniformity of its actual output current, resulting in inconsistent current uniformity for the different color light-emitting elements D0, which can cause color cast.

[0041] In the light-emitting phase, when the voltage of the first power supply terminal PVDD is transmitted from the first power supply terminal PVDD to the light-emitting element D0, since the transistor M1, the driving transistor M3 and the first light-emitting control transistor M6 are connected in series in the light-emitting branch, a voltage drop will be generated every time the voltage of the first power supply terminal PVDD passes through a transistor. Figure 5 , Figure 5 The figure shows the voltage division of the driving transistor in the pixel circuit of different light-emitting elements D0 after considering the influence of voltage drop. Figure 4Compared to the previous example, the voltage division is reduced, but the voltage division of the driving transistors corresponding to different light-emitting elements D0 still varies. The voltage division of the driving transistors corresponding to the red light-emitting element, the green light-emitting element, and the blue light-emitting element still differ significantly, and the color cast problem still exists. Assuming that the voltage of the first power supply terminal PVDD is 4.6V, for the transistor M1 in the light-emitting branch, it is directly connected to the first power supply terminal PVDD. If the turn-on voltage of transistor M1 is -7V, the Vgs of transistor M1 will reach -11.6V, and the resistance of M1 will be very small. When the current in the light-emitting branch is constant, the voltage division of transistor M1 will be minimum, that is, the influence of transistor M1 on the voltage division of the light-emitting branch is minimal. The first emission control transistor M6 is farthest from the first power supply terminal PVDD. After the power supply voltage is transmitted from the driver transistor M3 to the first emission control transistor M6, the voltage drop is the largest, potentially dropping to zero. If the on-state voltage of the first emission control transistor M6 is -7V, then the Vgs of the first emission control transistor M6 is only -7V. The resistance of the first emission control transistor M6 is greater than that of the transistor M1. When the currents in the light-emitting branches are the same, the voltage divided by the first emission control transistor M6 will be large. Therefore, if the impedance of the light-emitting branches remains unchanged, the voltage across the path from the driver transistor M3 to the first emission control transistor M6 has the greatest impact on the drive current.

[0042] Based on the above analysis, in the disclosed embodiments, the channel width-to-length ratio of the driver transistor in the first pixel circuit P1 is set to A1, and the channel width-to-length ratio of the first light-emitting control transistor is set to K1; in the second pixel circuit P2, the channel width-to-length ratio of the driver transistor is set to A2, and the channel width-to-length ratio of the first light-emitting control transistor is set to K2; where A1 / K1 ≠ A2 / K2. The driver transistor operates in the saturation region, and its channel width-to-length ratio A directly affects the output capability of the driver transistor. The first light-emitting control transistor M6 operates in the linear region. By adjusting the width-to-length ratio K of the first light-emitting control transistor M6, the on-resistance of the first light-emitting control transistor M6 can be changed, thereby changing the voltage drop it shares. Therefore, in the disclosed embodiments, by setting different A / K ratios for pixel circuits with at least two different color light-emitting elements, the voltage drops across the driver transistor M3 and the first light-emitting control transistor M6 in the light-emitting branch can be more precisely distributed during the design phase. For example, for light-emitting element D0 with a lower operating voltage, the ratio of A to K can be appropriately adjusted so that the voltage drop shared by the driving transistor M3 or the first emission control transistor M6 can reduce the difference in the divided voltage Vds of the driving transistor M3. This allows light-emitting elements D0 of different colors to achieve closer actual emission currents under the same grayscale drive signal, thereby significantly improving the current uniformity of light-emitting elements D0 of different colors and effectively alleviating the color cast problem. The disclosed embodiments can configure customized size ratios of the driving transistor M3 and the first emission control transistor M6 for each color pixel circuit during the design phase based on the characteristics of different light-emitting elements D0. This allows the pixel circuit to better adapt to the needs of different light-emitting elements D0, thereby facilitating improved overall display uniformity and color accuracy.

[0043] In an optional embodiment of the present disclosure, the turn-on voltage of the first light-emitting element D01 is lower than the turn-on voltage of the second light-emitting element D02, A1 / K1>A2 / K2. When the turn-on voltage of the first light-emitting element D01 is lower, according to Vd0=(PVDD-PVEE)-Vds(M1) -Vds(M3) - Vds(M6). Under a fixed total voltage, the remaining voltage is distributed to transistor M1, driver transistor M3, and first emission control transistor M6. Without optimizing A1 / K1 or A2 / K2, a low Vd0 will result in a higher Vds(M3), potentially leading to current deviation. Therefore, in the disclosed embodiments, by setting A1 / K1 relatively large, for example, by increasing the channel width-to-length ratio A1 of the driver transistor M3 corresponding to the first light-emitting element D01, or by decreasing the channel width-to-length ratio K1 of the first emission control transistor M6, the remaining voltage is distributed to transistor M1, driver transistor M3, and first emission control transistor M6. When the channel width-to-length ratio of the driver transistor M3 corresponding to the first light-emitting element D01 increases, the driving capability of the driver transistor M3 is enhanced. To achieve the same target current, the divided voltage of the driver transistor M3, Vds(M3), will decrease. When the channel width-to-length ratio of the first emission control transistor M6 decreases, the impedance of the first emission control transistor M6 increases, increasing the divided voltage Vds(M6), which can also decrease the divided voltage Vds(M3) of the driver transistor M3. Therefore, by setting A1 / K1>A2 / K2, the divided voltage Vds(M3) of the driving transistor M3 can be reduced, which is equivalent to reducing the divided voltage Vds(M3) of the driving transistor M3 in the pixel circuit corresponding to the first light-emitting element D01 with a smaller turn-on voltage, thereby helping to narrow the difference in the divided voltage corresponding to the driving transistor M3 in the pixel circuit corresponding to the first light-emitting element D01 and the second light-emitting element D02, so that the first light-emitting element D01 and the second light-emitting element D02 can achieve closer actual light-emitting current under the same grayscale driving signal, thereby significantly improving the current uniformity of the first light-emitting element D01 and the second light-emitting element D02, and effectively alleviating the color cast problem.

[0044] To achieve A1 / K1>A2 / K2, in an optional embodiment of the present disclosure, A1>A2 and K1=K2 can be set. That is, the sizes K1 and K2 of the first light emission control transistor M6 in the first pixel circuit P1 and the second pixel circuit P2 are kept the same (K1=K2), while A1 / K1>A2 / K2 is achieved by setting the size A1 of the driving transistor M3 to be larger than A2 (A1>A2).

[0045] When the channel width-to-length ratio K1 of the first light-emitting control transistor M6 in the first pixel circuit P1 and the second pixel circuit P2 is equal to K2, and when the current is the same, the divided voltage of the two first light-emitting control transistors M6 in the two light-emitting branches is the same. The driving transistor M3 operates in the saturation region. Increasing the width-to-length ratio A1 of the driving transistor M3 in the first pixel circuit P1 increases the current driving capability of the driving transistor M3 in the first pixel circuit P1, allowing it to stably output the target current even at a relatively low divided voltage Vds(M3). This reduces the divided voltage Vds(M3) of the driving transistor M3 in the first pixel circuit P1 corresponding to the first light-emitting element D01 with a lower turn-on voltage. Similarly, when the width-to-length ratio A2 of the driving transistor M3 in the second pixel circuit P2 is small, the current driving capability of the driving transistor M3 in the second pixel circuit P2 is reduced, so that the driving transistor M3 can stably output the target current only at a relatively high divided voltage Vds(M3). This increases the divided voltage Vds(M3) of the driving transistor M3 in the first pixel circuit P1 corresponding to the second light-emitting element D02 having a higher start-up voltage. This helps reduce the difference in divided voltage of the driving transistor M3 in the first pixel circuit P1 and the second pixel circuit P2 corresponding to the first light-emitting element D01 and the second light-emitting element D02 having different start-up voltages, making the divided voltages of the driving transistor M3 in the first pixel circuit P1 and the second pixel circuit P2 closer together. This improves the current uniformity caused by the difference in divided voltage of the driving transistor M3, thereby enabling the first light-emitting element D01 and the second light-emitting element D02 to achieve closer actual emission currents under the same grayscale drive signal, significantly improving the current uniformity between the first light-emitting element D01 and the second light-emitting element D02, and effectively alleviating the color cast problem.

[0046] As mentioned above, if the turn-on voltage of the first light-emitting element D01 is low, under a fixed total cross-voltage, the divided voltage Vds(M3) of the driving transistor M3 in the first pixel circuit P1 will be high. If the turn-on voltage of the second light-emitting element D02 is high, under a fixed total cross-voltage, the divided voltage Vds(M3) of the driving transistor M3 in the second pixel circuit P2 will be low. In the above embodiment, the size A1 of the driving transistor M3 in the first pixel circuit P1 and the second pixel circuit P2 is set to be larger than A2, and the sizes K1 and K2 of the first light-emitting control transistor M6 are the same. To achieve A1>A2, in an optional embodiment of the present disclosure, the channel region width of the driving transistor M3 in the first pixel circuit P1 is larger than the channel region width of the driving transistor M3 in the second pixel circuit P2, and the channel region length of the driving transistor M3 in the first pixel circuit P1 is equal to the channel region length of the driving transistor M3 in the second pixel circuit P2. For example, please refer to Figure 6 , Figure 6 Shown is a layout diagram of a pixel circuit provided by an embodiment of the present disclosure.

[0047] This embodiment provides a solution for achieving A1>A2 by adjusting the channel width of the driving transistor M3 in the first pixel circuit P1 and the second pixel circuit P2. For the first pixel circuit P1, increasing the channel width of the driving transistor M3 increases A1, thereby enhancing the current driving capability of the driving transistor M3 in the first pixel circuit P1. This allows for a more stable output of the target current within a relatively low voltage divider Vds(M3). This is equivalent to reducing the voltage divider Vds(M3) of the driving transistor M3 in the first pixel circuit P1 corresponding to the first light-emitting element D01 with a lower turn-on voltage. For the second pixel circuit P2, reducing the channel width of the driving transistor M3 decreases A2, thereby reducing the current driving capability of the driving transistor M3 in the second pixel circuit P2. This requires a relatively high voltage divider Vds(M3) to more stably output the target current. This is equivalent to increasing the voltage divider Vds(M3) of the driving transistor M3 in the second pixel circuit P2 corresponding to the second light-emitting element D02 with a higher turn-on voltage. Therefore, by differentially designing the channel widths of the driving transistors M3 in the first pixel circuit P1 and the second pixel circuit P2, the voltage division difference between the driving transistors M3 can be reduced, thereby improving the problem of poor current uniformity caused by the large voltage division difference.

[0048] Figure 7 Shown Figure 6 A schematic diagram of the layout of the active layer in the circuit, Figure 8 Shown in Figure 7 A schematic diagram of a layout after adding capacitor metal layer and gate metal layer on the basis of . Figures 6 to 8 In an optional embodiment of the present disclosure, in the driving transistor M3 corresponding to the first pixel circuit P1, the source and drain are connected to the active layer through n1 connection holes; in the driving transistor M3 corresponding to the second pixel circuit P2, the source and drain are connected to the active layer through n2 connection holes, where n1>n2.

[0049] In the circuit layout diagram, the source and drain of the transistor are connected to the source region and drain region of the active layer through connection holes, respectively. The more connection holes there are for connecting the source and drain and the active layer, the larger the width of the corresponding transistor will be. Figure 6This embodiment uses the example of connecting the source and drain of the driving transistor M3 in the first pixel circuit P1 to the active layer via eight connection holes, and the source and drain of the driving transistor M3 in the second pixel circuit P2 to the active layer via five connection holes, but the present disclosure is not limited to this. This increases the width of the channel region of the driving transistor M3 in the first pixel circuit P1. While maintaining the same length of the driving transistor M3 in the first pixel circuit P1 and the second pixel circuit P2, the width-to-length ratio A1 of the channel region of the driving transistor M3 in the first pixel circuit P1 is increased, making it greater than the width-to-length ratio A2 of the channel region of the driving transistor M3 in the second pixel circuit P2. As a result, the current driving capability of the driving transistor M3 in the first pixel circuit P1 is enhanced, so that the target current can be output more stably within a relatively low divided voltage Vds(M3) range. This is equivalent to reducing the divided voltage Vds(M3) of the driving transistor M3 in the first pixel circuit P1 corresponding to the first light-emitting element D01 with a smaller turn-on voltage, thereby reducing the divided voltage difference between the driving transistor M3 in the first pixel circuit P1 and the second pixel circuit P2, thereby improving the problem of poor current uniformity caused by the large divided voltage difference.

[0050] In an optional embodiment of the present disclosure, the driving transistor M3 in the first pixel circuit P1 includes m1 parallel sub-transistors, and the driving transistor M3 in the second pixel circuit P2 includes m2 parallel sub-transistors, where m1>m2. Considering that in order to increase the channel width of the driving transistor M3, if the width of the active layer is increased over a large area, the device performance will drift due to the excessive width of the device. Therefore, the active layer corresponding to the same driving transistor M3 can be disconnected, for example, please refer to Figure 9 , forming multiple sub-transistors connected in parallel. By connecting multiple sub-transistors of the same size in parallel, the required total effective channel width can be flexibly and accurately achieved, wherein, Figure 9 Shown Figure 6 Another layout diagram of the active layer in the circuit, which is similar to Figure 7 The difference is that the active layer corresponding to the driving transistor M3 in the first pixel circuit P1 is composed of two independent structures, while Figure 7 The active layer corresponding to the driving transistor M3 in the first pixel circuit P1 is an independent structure. Figure 9 Equivalent to Figure 7Based on this, the active layer of the driving transistor M3 in the first pixel circuit P1 is disconnected, increasing the number of sub-transistors included in the driving transistor M3 in the first pixel circuit P1. When m1>m2, the effective channel width of the driving transistor M3 in the first pixel circuit P1 is also greater than that in the second pixel circuit P2, thereby achieving the effect of A1>A2. This provides a driving transistor M3 with a larger effective channel width and stronger current driving capability for the first light-emitting element D01 (whose corresponding driving transistor M3 has a high Vds) with a lower turn-on voltage. This allows the driving transistor M3 to more accurately and stably output the target current even at a relatively low Vds. This helps reduce the difference in the divided voltage Vds of the driving transistors M3 corresponding to the first and second light-emitting elements D01 and D02, effectively compensating for the voltage difference within the light-emitting element D0, and improving the current uniformity of the different-colored light-emitting elements D0, thereby resolving the color cast problem and enhancing the color accuracy and overall visual quality of the displayed image.

[0051] In this embodiment, a large-area transistor is decomposed into multiple smaller, more compact sub-transistors, each with a relatively small active layer area. The smaller active layer area helps improve device uniformity and reduce performance drift caused by local defects, stress concentration, or material inhomogeneity. In actual manufacturing processes, repeated manufacturing of the same small-sized sub-transistors may have a higher yield than manufacturing a single oversized transistor, because it helps reduce the risk of a single large-area defect causing the entire device to fail.

[0052] In an optional embodiment of the present disclosure, the widths of the driving transistors M3 in the first pixel circuit P1 and the second pixel circuit P2 may be kept the same, and the width-to-length ratio of the driving transistor M3 in the first pixel circuit P1 may be increased by differentially designing the lengths of the driving transistors M3 in the two pixel driving circuits. For example, the channel length of the driving transistor M3 in the first pixel circuit P1 is set to be smaller than the channel length of the driving transistor M3 in the second pixel circuit P2, and the channel width of the driving transistor M3 in the first pixel circuit P1 is equal to the channel width of the driving transistor M3 in the second pixel circuit P2.

[0053] When the channel widths of the driving transistors M3 in the first pixel circuit P1 and the second pixel circuit P2 are the same, in this embodiment, the channel length of the driving transistor M3 in the first pixel circuit P1 is smaller than the channel length of the driving transistor M3 in the second pixel circuit P2, so that the channel width-to-length ratio A1 of the driving transistor M3 in the first pixel circuit P1 is greater than the channel width-to-length ratio of the driving transistor M3 in the second pixel circuit P2. Considering that when the total voltage across the light-emitting branch is fixed, the divided voltage Vds(M3) corresponding to the first light-emitting element D01 with a smaller turn-on voltage will be higher, while the divided voltage Vds(M3) corresponding to the second light-emitting element D02 with a larger turn-on voltage will be lower. Increasing the channel width-to-length ratio A1 of the driving transistor M3 in the first pixel circuit P1 is beneficial to increasing the current driving capability of the driving transistor M3 in the first pixel circuit P1. In this way, the first pixel circuit P1 can output the target current more stably within a relatively low divided voltage Vds(M3) range, which is equivalent to reducing the divided voltage Vds(M3) of the driving transistor M3 in the first pixel circuit P1 corresponding to the first light-emitting element D01 with a smaller turn-on voltage, thereby reducing the divided voltage difference between the driving transistor M3 in the first pixel circuit P1 and the second pixel circuit P2, thereby improving the problem of poor current uniformity caused by the large divided voltage difference.

[0054] Figure 10 FIG. 1 shows another layout diagram of a pixel circuit provided in an embodiment of the present disclosure. Figure 11 Shown Figure 10 A schematic diagram of the layout of the active layer in the circuit, Figure 10 and Figure 11 In the embodiment shown, the width-to-length ratio of the driving transistors M3 of the first pixel circuit P1 and the second pixel circuit P2 is the same, and the width-to-length ratio of the first light-emitting control transistor M6 in the first pixel circuit P1 is smaller than the width-to-length ratio of the first light-emitting control transistor M6 in the second pixel circuit. Figure 10 and Figure 11To achieve A1 / K1>A2 / K2, in an optional embodiment of the present disclosure, K1<K2, and A1=A2, can also be set. That is, while maintaining the same channel width-to-length ratio of the driving transistor M3 in the first pixel circuit P1 and the second pixel circuit P2, the channel width-to-length ratio K1 corresponding to the first emission control transistor M6 in the first pixel circuit P1 is reduced to be smaller than the channel width-to-length ratio K2 of the second emission control transistor M6 in the second pixel circuit P2. The first emission control transistor M6 operates in the linear region. The smaller its channel width-to-length ratio, the greater its on-resistance. Conversely, the larger its channel width-to-length ratio, the smaller its on-resistance. Therefore, for the first pixel circuit P1, when the width-to-length ratio K1 of the first emission control transistor M6 is set to a smaller value, the on-resistance of the first emission control transistor M6 will increase. When the target current is consistent, the voltage divided by the first emission control transistor M6 will increase. According to the aforementioned embodiment, Vd0 = (PVDD-PVEE)-Vds(M1)-Vds(M3)-Vds(M6). When the total voltage across the light-emitting branch (PVDD-PVEE) remains constant and the divided voltage Vds(M1) of transistor M1 remains unchanged, the divided voltage Vds(M3) of the driving transistor M3 in the first pixel circuit P1 corresponding to the first light-emitting element D01 having a smaller turn-on voltage Vd0 will be relatively reduced. For the second pixel circuit P2, when the total voltage across the light-emitting branch (PVDD-PVEE) remains constant and the divided voltage Vds(M1) of transistor M1 remains unchanged, the divided voltage Vds(M3) of the driving transistor M3 in the second pixel circuit P2 corresponding to the second light-emitting element D02 having a larger turn-on voltage Vd0 will be relatively increased. This helps to reduce the voltage division difference of the driving transistor M3 in the pixel circuit corresponding to the first light-emitting element D01 with a smaller turn-on voltage and the second light-emitting element D02 with a larger turn-on voltage, thereby improving the problem of poor current uniformity caused by the large voltage division difference and improving the color cast problem.

[0055] In this embodiment, compensation is not achieved directly by changing the current driving capability of the driving transistor M3 itself. Instead, the voltage environment of the driving transistor M3 (i.e., the voltage divider Vds(M3)) is indirectly changed by adjusting the voltage drop of the first light-emitting control transistor M6. This can also achieve a refined distribution of the total voltage drop of the light-emitting branch, ensuring that each component in the light-emitting branch (especially the driving transistor M3) operates at the most favorable operating point to achieve stable current output.

[0056] When the voltage environment of the driving transistor M3 (i.e., the divided voltage Vds(M3)) is indirectly changed by adjusting the voltage drop of the first light-emitting control transistor M6 to reduce the divided voltage difference between the driving transistor M3 in the first pixel circuit P1 and the second pixel circuit P2, a feasible implementation method is to refer to Figure 10 and Figure 11, setting the channel width of the first light-emitting control transistor in the first pixel circuit P1 to be smaller than the channel width of the first light-emitting control transistor in the second pixel circuit P2, and the channel length of the first light-emitting control transistor in the first pixel circuit P1 to be equal to the length of the first light-emitting control transistor in the second pixel circuit P2.

[0057] For the first light-emitting control transistor, its on-resistance is inversely proportional to the width-to-length ratio of the channel. When the channel length is constant, the smaller the channel width of the transistor, the smaller its width-to-length ratio, and the smaller the saturation current (or maximum on-current) is generally. This means that under the same gate voltage, the transistor with a smaller channel width (i.e., the first light-emitting control transistor in the first pixel circuit P1) can pass less current and has a greater on-resistance. Therefore, when the same target current is passed, the divided voltage Vds (M6) of the first light-emitting control transistor in the first pixel circuit P1 will increase. According to the aforementioned embodiment, Vd0 = (PVDD - PVEE) - Vds(M1) - Vds(M3) - Vds(M6). When the total voltage across the light-emitting branch (PVDD - PVEE) remains constant and the divided voltage Vds(M1) of transistor M1 remains unchanged, increasing the divided voltage Vds(M6) of the first light-emitting control transistor will decrease the divided voltage Vds(M3) of the driving transistor M3. In other words, the divided voltage Vds(M3) of the driving transistor M3 in the first pixel circuit P1 corresponding to the first light-emitting element D01 having a smaller turn-on voltage Vd0 will be relatively reduced. For the second pixel circuit P2, the divided voltage Vds(M3) of the driving transistor M3 in the second pixel circuit P2 corresponding to the second light-emitting element D02 having a larger turn-on voltage Vd0 will be relatively increased. In this way, by adjusting the channel width of the first light-emitting control transistor M6, the voltage division of the driving transistor M3 can be cleverly adjusted, which is conducive to reducing the voltage division difference of the driving transistor M3 in the pixel circuit corresponding to the first light-emitting element D01 with a smaller turn-on voltage and the second light-emitting element D02 with a larger turn-on voltage. This can improve the problem of poor current uniformity caused by the large voltage division difference, help to achieve a more uniform driving current, improve color cast, and thus enhance the overall image quality and visual experience of the display screen.

[0058] In addition to adjusting the voltage division of the driving transistor M3 by adjusting the channel width of the first emission control transistor, the voltage division of the driving transistor M3 can also be adjusted by adjusting the channel length of the first emission control transistor. For example, in an optional embodiment of the present disclosure, the channel length of the first emission control transistor corresponding to the first pixel circuit P1 is greater than the channel length of the first emission control transistor corresponding to the second pixel circuit P2, and the channel width of the first emission control transistor corresponding to the first pixel circuit P1 is equal to the channel width of the first emission control transistor corresponding to the second pixel circuit P2.

[0059] Considering that the on-resistance of the first light-emitting control transistor is inversely proportional to the channel width-to-length ratio, when the channel width of the first light-emitting control transistor is consistent, the larger its channel length, the smaller its width-to-length ratio, and the corresponding larger its on-resistance. When the same target current flows through it, the corresponding divided voltage Vds (M6) of the first light-emitting control transistor will increase. Therefore, the divided voltage of the driving transistor M3 in the first pixel circuit P1 corresponding to the first light-emitting element D01 with a lower turn-on voltage can be reduced. This reduces the difference in divided voltage between the driving transistor M3 corresponding to the first light-emitting element D01 with a lower turn-on voltage and the second light-emitting element D02 with a higher turn-on voltage, thereby alleviating the resulting poor current uniformity and improving color cast. This, in turn, helps improve the brightness uniformity of the display product and enhances the overall display quality.

[0060] To achieve K1<K2, A1=A2, in an optional embodiment of the present disclosure, please refer to Figure 10 In the driving transistor M3 corresponding to the first pixel circuit P1, the source and drain electrodes are connected to the active layer via n1 connection holes; in the driving transistor M3 corresponding to the second pixel circuit P2, the source and drain electrodes are connected to the active layer via n2 connection holes, where n1 = n2. By reducing the voltage divider difference of the driving transistor M3 by adjusting the aspect ratio of the first light-emitting control transistors corresponding to the first and second light-emitting elements D01 and D02, which have different turn-on voltages, the dimensions of the driving transistors M3 corresponding to the first and second light-emitting elements D01 and D02 can be kept the same, using the same aspect ratio. The number of connection holes between the source and drain electrodes and the active layer in the different driving transistors M3 is the same. This allows the driving transistors M3 corresponding to the first and second light-emitting elements D01 and D02 to be manufactured using the same dimensions, thereby simplifying the overall panel manufacturing process.

[0061] To achieve A1 / K1>A2 / K2, the above embodiments describe a solution for adjusting the width-to-length ratio of the driving transistor M3 while maintaining the same width-to-length ratio of the first light-emitting control transistors in the first pixel circuit P1 and the second pixel circuit P2, and a solution for adjusting the width-to-length ratio of the first light-emitting control transistor while maintaining the same width-to-length ratio of the driving transistor M3 in the first pixel circuit P1 and the second pixel circuit P2. However, the present disclosure is not limited thereto. In an optional embodiment of the present disclosure, the width-to-length ratio of the driving transistor M3 and the first light-emitting control transistor in the first pixel circuit P1 and the second pixel circuit P2 may also be adjusted simultaneously. For example, please refer to Figure 12 and Figure 13 , set A1>A2, K1<K2, where, Figure 12 FIG. 1 shows another layout diagram of a pixel circuit provided in an embodiment of the present disclosure. Figure 13 Shown Figure 12A schematic diagram of the layout of the active layer in the circuit, Figure 14 Shown in Figure 13 A schematic diagram of a layout after adding a gate metal layer on the basis of

[0062] Increasing the width-to-length ratio A1 of the driving transistor M3 in the first pixel driving circuit increases the current driving capability of the driving transistor M3 in the first pixel circuit P1. This allows the first pixel circuit P1 to more stably output the target current within a relatively low voltage divider Vds(M3). This is equivalent to reducing the voltage divider Vds(M3) of the driving transistor M3 in the first pixel circuit P1 corresponding to the first light-emitting element D01 having a lower turn-on voltage. Simultaneously, further reducing the width-to-length ratio K1 of the first emission control transistor M6 in the first pixel circuit P1 increases the on-resistance of the first emission control transistor M6 in the first pixel circuit P1. When the same target current flows through the first emission control transistor M6, the voltage divider Vds(M6) of the first emission control transistor M6 increases. As the voltage divider Vds(M6) of the first emission control transistor M6 increases, the voltage divider Vds(M3) of the driving transistor M3 further decreases. Therefore, this embodiment effectively reduces the voltage division of the driving transistor M3 corresponding to the first light-emitting element D01 with a smaller turn-on voltage by increasing the width-to-length ratio A1 of the driving transistor M3 in the first pixel circuit P1 and reducing the width-to-length ratio K1 of the first light-emitting control transistor. This effectively reduces the voltage division difference of the driving transistor M3 in the pixel circuit corresponding to the first light-emitting element D01 with a smaller turn-on voltage and the second light-emitting element D02 with a larger turn-on voltage. This is beneficial to improving the current uniformity of the first light-emitting element D01 and the second light-emitting element D02, improving color cast, and enhancing the overall display effect.

[0063] Please continue to refer to Figures 12 to 14 To achieve A1>A2, K1<K2, in an optional embodiment of the present disclosure, the channel width of the driving transistor M3 in the first pixel circuit P1 is greater than the channel width of the driving transistor M3 in the second pixel circuit P2; the channel width of the first light-emitting control transistor in the first pixel circuit P1 is smaller than the channel width of the first light-emitting control transistor in the second pixel circuit P2, and / or the channel length of the first light-emitting control transistor in the first pixel circuit P1 is greater than the channel length of the first light-emitting control transistor in the second pixel circuit P2.

[0064] For the short-channel drive transistor M3, the aspect ratio can be adjusted by changing its width. For example, when the drive transistors M3 in both the first pixel circuit P1 and the second pixel circuit P2 are short-channel transistors, their channel lengths are difficult to adjust. In this case, the channel width of the drive transistor M3 in the first pixel circuit P1 can be increased to increase the aspect ratio of the drive transistor M3 in the first pixel circuit P1 corresponding to the first light-emitting element D01 with a lower turn-on voltage, thereby increasing the current output capability of the drive transistor M3 in the first pixel circuit P1. In this way, the first pixel circuit P1 can more stably output the target current within a relatively low divided voltage Vds(M3) range, which is equivalent to reducing the divided voltage Vds(M3) of the drive transistor M3 in the first pixel circuit P1 corresponding to the first light-emitting element D01 with a lower turn-on voltage.

[0065] While increasing the width of the driving transistor M3 in the first pixel circuit P1 to enhance its current driving capability, the channel width of the first light-emitting control transistor M6 in the first pixel circuit P1 can also be further reduced. In this case, the channel lengths of different first light-emitting control transistors M6 can remain consistent. The on-resistance of the first light-emitting control transistor M6 is inversely proportional to its channel width-to-length ratio. Therefore, reducing the channel width of the first light-emitting control transistor M6 reduces its width-to-length ratio, increases its on-resistance, and increases the voltage divided by the first light-emitting control transistor M6 while maintaining the same target current. Therefore, for a constant total voltage across the light-emitting branch, the voltage divided by the driving transistor M3 corresponding to the first light-emitting element D01 with a lower turn-on voltage can be further reduced, thereby reducing the difference in voltage divided by the driving transistor M3 corresponding to light-emitting elements D0 with different turn-on voltages. This helps reduce current uniformity across light-emitting elements D0 with different turn-on voltages, thereby improving color cast and enhancing the overall display quality.

[0066] In addition to the above approach, while increasing the width of the driving transistor M3 in the first pixel circuit P1 to enhance its current driving capability, the channel length of the first light-emitting control transistor in the first pixel circuit P1 can also be increased. In this case, the channel widths of different first light-emitting control transistors M6 can remain consistent. The on-resistance of the first light-emitting control transistor M6 is inversely proportional to its channel width-to-length ratio. Therefore, increasing the channel length of the first light-emitting control transistor M6 can also reduce its width-to-length ratio to increase its on-resistance. When the target current remains constant, the voltage divided by the first light-emitting control transistor M6 can also be increased, while the voltage divided by the driving transistor M3 corresponding to the first light-emitting element D01 with a lower turn-on voltage can be reduced. Consequently, the voltage divided by the driving transistor M3 corresponding to the light-emitting element D0 with a different turn-on voltage can be reduced. This can also reduce the difference in voltage divided by the driving transistor M3 corresponding to the light-emitting element D0 with a different turn-on voltage, thereby reducing current uniformity across the light-emitting elements D0 with different turn-on voltages. This improves color cast and enhances the overall display quality.

[0067] Of course, in some other embodiments of the present disclosure, while increasing the width of the driving transistor M3 in the first pixel circuit P1 to increase the current driving capability of the driving transistor M3, the channel width of the first light-emitting control transistor M6 in the first pixel circuit P1 can be further reduced, and the channel length of the first light-emitting control transistor M6 in the first pixel circuit P1 can be increased. Similarly, the voltage division of the first light-emitting control transistor corresponding to the first light-emitting element D01 with a lower turn-on voltage can be increased, and the voltage division of the driving transistor M3 can be reduced, thereby reducing the voltage division difference between the driving transistors M3 in the first pixel circuit P1 and the second pixel circuit P2, improving color cast, and enhancing the overall display effect.

[0068] In practical applications, the improvement method can be flexibly selected based on the actual difference in voltage division of the driving transistors M3 corresponding to the light-emitting elements D0 with different turn-on voltages. For example, if the actual difference in voltage division of the driving transistors M3 corresponding to the light-emitting elements D0 with different turn-on voltages is relatively large, the aspect ratios of the driving transistors M3 and the first light-emission control transistor M6 can be adjusted simultaneously to minimize the difference in voltage division of the different driving transistors M3. If the actual difference in voltage division of the driving transistors M3 corresponding to the light-emitting elements D0 with different turn-on voltages is relatively small, only the aspect ratio of the driving transistor M3 or only the aspect ratio of the first light-emission control transistor M6 can be adjusted to minimize the difference in voltage division of the different driving transistors M3.

[0069] The above embodiment shows that by increasing the channel width of the driving transistor M3 in the first pixel circuit P1 and reducing the channel width of the first light emission control transistor in the first pixel circuit P1 or increasing the channel length of the first light emission control transistor in the first pixel circuit P1, the aspect ratio of the driving transistor M3 and the first light emission control transistor is adjusted, thereby achieving the effect of A1>A2, K1<K2. In order to achieve A1>A2, K1<K2, in addition to the above implementation methods, please refer to Figure 3 , the channel length of the driving transistor M3 can also be adjusted. In an optional embodiment of the present disclosure, the channel length of the driving transistor M3 in the first pixel circuit P1 is smaller than the channel length of the driving transistor M3 in the second pixel circuit P2; the channel width of the first light-emitting control transistor M6 in the first pixel circuit P1 is smaller than the channel width M6 of the first light-emitting control transistor in the second pixel circuit P2, and / or the channel length of the first light-emitting control transistor M6 in the first pixel circuit P1 is greater than the channel length of the first light-emitting control transistor M6 in the second pixel circuit P2.

[0070] In this embodiment, the channel length of the driving transistor M3 in the first pixel circuit P1 is set to be smaller than the channel length of the driving transistor M3 in the second pixel circuit P2. In this case, the channel width of the driving transistor M3 can be maintained the same. When the channel length of the driving transistor M3 in the first pixel circuit P1 is reduced, the width-to-length ratio of the driving transistor M3 in the first pixel circuit P1 corresponding to the first light-emitting element D01 with a lower turn-on voltage can be increased, thereby increasing the current output capability of the driving transistor M3 in the first pixel circuit P1. In this way, the first pixel circuit P1 can more stably output the target current within a relatively low divided voltage Vds(M3) range, which is equivalent to reducing the divided voltage Vds(M3) of the driving transistor M3 in the first pixel circuit P1 corresponding to the first light-emitting element D01 with a lower turn-on voltage.

[0071] While reducing the length of the driving transistor M3 in the first pixel circuit P1 to increase its current driving capability, the channel width of the first light-emitting control transistor M6 in the first pixel circuit P1 can also be further reduced. In this case, the channel lengths of different first light-emitting control transistors M6 can remain consistent. The on-resistance of the first light-emitting control transistor M6 is inversely proportional to its channel width-to-length ratio. Therefore, reducing the channel width of the first light-emitting control transistor M6 reduces its width-to-length ratio and increases its on-resistance. This increases the voltage division of the first light-emitting control transistor M6 while maintaining the same target current. For a constant total voltage across the light-emitting branch, the voltage division of the driving transistor M3 corresponding to the first light-emitting element D01 with a lower turn-on voltage can be further reduced. This reduces the difference in voltage division across the driving transistor M3 corresponding to light-emitting elements D0 with different turn-on voltages. This helps reduce current uniformity across light-emitting elements D0 with different turn-on voltages, thereby improving color cast and enhancing the overall display quality.

[0072] In addition to the above approach, while reducing the length of the driving transistor M3 in the first pixel circuit P1 to increase its current driving capability, the channel length of the first emission control transistor M6 in the first pixel circuit P1 can also be increased. In this case, the channel widths of different first emission control transistors M6 can be kept consistent. The on-resistance of the first emission control transistor M6 is inversely proportional to its channel width-to-length ratio. Therefore, increasing the channel length of the first emission control transistor can also reduce its width-to-length ratio to increase its on-resistance. When the target current remains constant, the voltage divided by the first emission control transistor M6 can also be increased, while the voltage divided by the driving transistor M3 corresponding to the first light-emitting element D01 with a lower turn-on voltage can be reduced. Consequently, the difference in voltage divided by the driving transistor M3 corresponding to the light-emitting element D0 with different turn-on voltages can be reduced, which helps reduce current uniformity across the light-emitting elements D0 with different turn-on voltages. This improves color cast and enhances the overall display quality.

[0073] Of course, in some other embodiments of the present disclosure, while reducing the length of the driving transistor M3 in the first pixel circuit P1 to increase the current driving capability of the driving transistor M3, the channel width of the first light-emitting control transistor M6 in the first pixel circuit P1 can be further reduced, and the channel length of the first light-emitting control transistor M6 in the first pixel circuit P1 can be increased. Similarly, the voltage division of the first light-emitting control transistor M6 corresponding to the first light-emitting element D01 with a lower turn-on voltage can be increased, while the voltage division of the driving transistor M3 can be reduced. This reduces the voltage division difference between the driving transistors M3 in the first pixel circuit P1 and the second pixel circuit P2, improves color cast, and enhances the overall display effect.

[0074] Please refer to Figure 1 and Figure 2 In an optional embodiment of the present disclosure, A1 / K1=m*A2 / K2, where 1<m≤6. In related art, when the channel width-to-length ratio of the driving transistor M3 corresponding to the first light-emitting element D01 and the second light-emitting element D02, which have a large difference in turn-on voltage, is set to be consistent with the channel width-to-length ratio of the first light-emitting control transistor M6, that is, when m=1, the current uniformity of the first light-emitting element D01 with a lower turn-on voltage and the second light-emitting element D02 with a higher turn-on voltage differ significantly. For example, assuming that the first light-emitting element D01 is a red light-emitting element and the second light-emitting element D02 is a green light-emitting element, experiments have found that when A1 / K1=A2 / K2=0.5, the current uniformity of the first light-emitting element D01 is 89.6%, while the current uniformity of the second light-emitting element D02 is 85.8%, which is a significant difference. For an ideal display product, when displaying a pure color image, for example, when all red light-emitting elements are emitting light, the driving current of all red light-emitting elements is consistent, and the current uniformity can be reflected as 100%. However, due to external factors such as manufacturing process deviations and differences in the light-emitting elements D0 themselves, differences in the current flowing through different light-emitting elements D0 of the same color can occur. Current uniformity reflects the degree of current consistency across light-emitting elements D0 of the same color. In the disclosed embodiment, when m is set to greater than 1, the voltage division of the driving transistor M3 corresponding to the first light-emitting element D01 with a lower turn-on voltage can be reduced by adjusting the aspect ratio of the driving transistor M3 and / or the first light-emitting control transistor M6. This reduces the voltage division difference between the driving transistors M3 corresponding to the first light-emitting element D01 and the second light-emitting element D02, which have different turn-on voltages, thereby narrowing the current uniformity difference between the two. When m>6, the voltage division of the driving transistor M3 corresponding to the first light-emitting element D01 may be too small, resulting in new current uniformity differences. For example, the current uniformity of the first light-emitting element D01 decreases from 89.6% to less than 85.8%, while still differing significantly from 85.8%. Therefore, in the embodiment of the present disclosure, when 1<m≤6 is set, the current uniformity of the first light-emitting element D01 can be made closer to the current uniformity of the second light-emitting element D02. For example, when m=2, the current uniformity of the first light-emitting element D01 can be reduced from 89.6% to 86.7%, narrowing the difference from the 85.8% current uniformity of the second light-emitting element D02. It should be noted that the above current uniformity data is only an example. In actual applications, the range of m can be flexibly set according to actual differences. Optionally, 2≤m≤5, or 1.5≤m≤4.5, are not specifically limited in this disclosure.

[0075] In an optional embodiment of the present disclosure, the first light-emitting element D01 is a red light-emitting element, and the second light-emitting element D02 is one of a green light-emitting element and a blue light-emitting element. When the light-emitting element D0 provided in the embodiments of the present disclosure is a light-emitting diode, the turn-on voltages of the light-emitting elements D0 of different colors are not exactly the same. For example, the turn-on voltage of the red light-emitting element D0 is the lowest, ranging from approximately 1.6V to 2.2V. The turn-on voltages of the green and blue light-emitting elements are relatively higher, ranging from approximately 1.9V to 4V, and the turn-on voltage of the blue light-emitting element is approximately 2.4V to 4V. In other words, the turn-on voltage of the red light-emitting element is significantly different from that of the green and blue light-emitting elements, while the turn-on voltages of the green and blue light-emitting elements are relatively close. Therefore, the first light-emitting element D01 mentioned in the aforementioned embodiments can be considered a red light-emitting element with a lower turn-on voltage, while the second light-emitting element D02 can be considered a green or blue light-emitting element with a higher turn-on voltage. In this way, the current uniformity difference between the red light emitting element and the green light emitting element or the blue light emitting element can be reduced, and the overall display brightness uniformity of the display panel can be improved, which is beneficial to improving the overall display effect of the display panel.

[0076] The above embodiments illustrate an improvement solution for the problem of large current uniformity differences when displaying when the first light-emitting element D01 and the second light-emitting element D02 have different turn-on voltages in the display panel. When the display panel includes a light-emitting element of a third color, the corresponding solution can also be used for improvement to enhance the uniformity of the overall display effect of the display product.

[0077] Please refer to Figure 1 、 Figure 6 and Figure 7 In an optional embodiment of the present disclosure, the light-emitting element D0 further includes a third light-emitting element D03, and the light-emitting color of the third light-emitting element D03 is different from the light-emitting colors of the first light-emitting element D01 and the second light-emitting element D02; the pixel circuit P further includes a third pixel circuit P3, and the third light-emitting element D03 is electrically connected to the third pixel circuit P3; in the third pixel circuit P3, the channel width-to-length ratio of the driving transistor M3 is A3, and the channel width-to-length ratio of the first light-emitting control transistor is K3; the turn-on voltage of the first light-emitting element D01 is less than the turn-on voltage of the second light-emitting element D02, and the turn-on voltage of the second light-emitting element D02 is less than or equal to the turn-on voltage of the third light-emitting element D03; A1 / K1=m*A2 / K2, A2 / K2=n*A3 / K3, m>n≥1.

[0078] When the display panel includes light-emitting elements of three colors (e.g., red, green, and blue), the three light-emitting elements D0 are respectively a first light-emitting element D01, a second light-emitting element D02, and a third light-emitting element D03. Considering that the turn-on voltage of the red light-emitting element D0 is the lowest and the turn-on voltages of the green and blue light-emitting elements are close, the first light-emitting element D01 is optionally a red light-emitting element, the second light-emitting element D02 is one of the green and blue light-emitting elements, and the third light-emitting element D03 is the other of the green and blue light-emitting elements. For example, the first light-emitting element D01 is a red light-emitting element, the second light-emitting element D02 is a green light-emitting element, and the third light-emitting element D03 is a blue light-emitting element. Alternatively, the first light-emitting element D01 is a red light-emitting element, the second light-emitting element D02 is a blue light-emitting element, and the third light-emitting element D03 is a green light-emitting element.

[0079] Based on the difference in turn-on voltages, the ratio of the channel width-to-length ratio A of the driving transistor M3 and the channel width-to-length ratio K of the first light-emitting control transistor in the pixel circuits corresponding to the three light-emitting elements D0 can be set to: A1 / K1>A2 / K2≥A3 / K3. Furthermore, A1 / K1=m*A2 / K2 and A2 / K2=n*A3 / K3, with m>n≥1. For green and blue light-emitting elements, since the turn-on voltage difference is relatively small, n can be set to 1, so that A2 / K2=A3 / K3. This eliminates the need to differentiate the sizes of the driving transistor M3 and the first light-emitting control transistor corresponding to the green and blue light-emitting elements. Instead, the sizes of the driving transistor M3 and / or the first light-emitting control transistor M6 corresponding to the first light-emitting element D01 need only be adjusted. This simplifies the overall manufacturing of the display panel, improves display brightness uniformity, alleviates color cast issues, and improves production efficiency.

[0080] Of course, in order to achieve refined control of current uniformity, the embodiment of the present disclosure can also differentiate the design of A2 / K2 and A3 / K3 according to the difference in turn-on voltages of the second light-emitting element D02 and the third light-emitting element D03. For example, when the turn-on voltage of the second light-emitting element D02 is less than the turn-on voltage of the third light-emitting element D03, A2 / K2>A3 / K3 can be set to further reduce the current uniformity difference between the second light-emitting element D02 and the third light-emitting element D03.

[0081] In this embodiment, by setting A1 / K1>A2 / K2, the current uniformity difference between the first light-emitting element D01 and the second light-emitting element D02 can be reduced. By setting A2 / K2≥A3 / K3, the current uniformity difference between the second light-emitting element D02 and the third light-emitting element D03 can be reduced. Therefore, the current uniformity difference between the first light-emitting element D01, the second light-emitting element D02 and the third light-emitting element D03 can be reduced, the display brightness uniformity of different light-emitting elements D0 is improved, and the color cast problem is effectively improved.

[0082] In an optional embodiment of the present disclosure, m≤6. As analyzed above, when m>6, the voltage division of the driving transistor M3 corresponding to the first light-emitting element D01 may be too small, resulting in a new current uniformity difference. For example, the current uniformity of the first light-emitting element D01 is reduced from 89.6% to less than 85.8%, while still differing greatly from 85.8%. Therefore, in the embodiment of the present disclosure, when 1<m≤6 is set, the current uniformity of the first light-emitting element D01 can be made closer to the current uniformity of the second light-emitting element D02. For example, when m=2, the current uniformity of the first light-emitting element D01 will be able to be reduced from 89.6% to 86.7%, narrowing the difference with the current uniformity of 85.8% of the second light-emitting element D02. It should be noted that the above current uniformity data is only an example. In actual applications, the range of m can be flexibly set according to actual differences. Optionally, 2≤m≤5, or 1.5≤m≤4.5, and this disclosure does not specifically limit this.

[0083] Please refer to Figure 1 and Figure 6 In an optional embodiment of the present disclosure, the display panel includes a plurality of pixel units Z, wherein: Figure 6 The following diagram illustrates the pixel circuits in a pixel unit Z. A pixel unit Z includes a first pixel circuit P1 and a second pixel circuit P2. The first pixel circuit P1 and the second pixel circuit P2 in a pixel unit Z are adjacent to each other. The first pixel circuit P1 is connected to a first data line DA1, and the second pixel circuit P2 is connected to a second data line DA2. Along the arrangement direction of the first pixel circuit P1 and the second pixel circuit P2, the first data line DA1 and the second data line DA2 are located between the first pixel circuit P1 and the second pixel circuit P2.

[0084] Please refer to Figure 6In the first pixel circuit P1, the transistor M2 is connected to the first data line DA1, and the data signal is obtained through the first data line DA1. In the second pixel circuit P2, the transistor M2 is connected to the second data line DA2, and the data signal is obtained through the second data line DA2. In a pixel unit Z, the first pixel circuit P1 corresponding to the first light-emitting element D01 and the second pixel circuit P2 corresponding to the second light-emitting element D02 are arranged adjacent to each other. Considering that the turn-on voltage of the first light-emitting element D01 is lower than the turn-on voltage of the second light-emitting element D02, A1 / K1>A2 / K2 can be achieved by increasing the width-to-length ratio of the driving transistor M3 in the first pixel circuit P1, thereby reducing the current uniformity difference between the first light-emitting element D01 and the second light-emitting element D02. In actual production, the channel width of the driving transistor M3 in the first pixel circuit P1 can be increased, for example Figure 6 In this case, disposing the first data line DA1 and the second data line DA2 between the first pixel circuit P1 and the second pixel circuit P2 is equivalent to moving the first data line DA1, originally located on the left side of the first pixel circuit P1 (away from the second pixel circuit P2), to the right side of the first pixel circuit P1 (closer to the second pixel circuit P2). This eliminates the need for a data line on the left side of the first pixel circuit P1. This provides space for increasing the channel width-to-length ratio of the driving transistor M3 in the first pixel circuit P1, thereby simplifying the display panel manufacturing process. When the channel width-to-length ratio of the driving transistor M3 in the first pixel circuit P1 is increased, such that A1 / K1>A2 / K2, the voltage divided by the driving transistor M3 corresponding to the first light-emitting element D01 with a lower turn-on voltage is reduced, thereby reducing the voltage divided by the driving transistor M3 corresponding to the first light-emitting element D01 and the second light-emitting element D02. This reduces the current uniformity difference between the first light-emitting element D01 and the second light-emitting element D02, thereby improving color cast, enhancing the overall brightness uniformity of the display panel, and enhancing the display quality.

[0085] Please continue to refer to Figure 1 and Figure 6 In an optional embodiment of the present disclosure, the pixel unit Z also includes a third pixel circuit P3. In the same pixel unit Z, the third pixel circuit P3 is located on a side of the second pixel circuit P2 away from the first pixel circuit P1. The third pixel circuit P3 is connected to the third data line DA3, and the third data line DA3 is located between the second pixel circuit P2 and the third pixel circuit P3.

[0086] When the third data line DA3 corresponding to the third pixel circuit P3 is set between the second pixel circuit P2 and the third pixel circuit P3, taking a pixel unit Z as an example, the three data lines are all arranged in the area between the first pixel circuit P1 and the third pixel circuit P3, and no data lines will be set on the side of the first pixel circuit P1 away from the second pixel circuit P2 and on the side of the third pixel circuit P3 away from the second pixel circuit P2. In this way, no data lines will be arranged between adjacent pixel units Z, that is, in two adjacent pixel units Z, no data lines are set between the first pixel circuit P1 in one pixel unit Z and the third pixel circuit P3 in the other pixel unit Z. Therefore, it can also reserve space for increasing the width-to-length ratio of the driving transistor M3 in the first pixel circuit P1, thereby reducing the current uniformity difference of different light-emitting elements D0 while simplifying the difficulty of display panel manufacturing.

[0087] It should be noted that the layout in the accompanying drawings of the present disclosure is for illustration only. In the present disclosure, for a pixel unit Z, the transistors M7 corresponding to the three pixel circuits are all concentrated below the middle pixel circuit, which is beneficial for saving circuit layout space. However, the present disclosure is not limited to this. In some other embodiments of the present disclosure, the transistors M7 corresponding to different pixel circuits can also be respectively set in the area where the corresponding pixel circuit is located.

[0088] The aforementioned embodiment is described using the example of a pixel circuit comprising seven transistors and one capacitor, but the present disclosure is not limited thereto. In some other embodiments of the present disclosure, the pixel circuit may further include a pulse amplitude modulation circuit and a pulse width modulation circuit, wherein the pulse width modulation circuit is electrically connected to the pulse amplitude modulation circuit, and the pulse amplitude modulation circuit is electrically connected to the light-emitting element. This type of pixel circuit is configured as a whole to provide a driving current to the light-emitting element, wherein the pulse amplitude modulation circuit is configured to control the amplitude of the driving current based on applied pulse amplitude modulation data, and the pulse width modulation circuit is configured to control the pulse width of the driving current. Optionally, the pulse width modulation circuit may also include the light-emitting branch mentioned in the aforementioned embodiment, with the difference being that the output end of the light-emitting branch in the aforementioned embodiment is connected to the light-emitting element, while the output end of the light-emitting branch of the pulse width modulation circuit in this embodiment is connected to the pulse amplitude modulation circuit. In this embodiment, the corresponding relationship between the width-to-length ratios of the transistors in the light-emitting branch of the pulse width modulation circuit can be designed according to the corresponding relationship between the width-to-length ratios within the light-emitting branch in the aforementioned embodiment, which is also beneficial for improving the current uniformity of light-emitting elements of different colors and effectively alleviating color cast problems. It should be noted that the specific circuit structures of the pulse amplitude modulation circuit and the pulse width modulation circuit can be referred to in related technologies and will not be described in detail in the embodiments of the present disclosure.

[0089] Based on the same inventive concept, the present disclosure also provides a display device, Figure 15FIG2 is a schematic diagram of a structure of a display device 200 provided in an embodiment of the present disclosure, please refer to FIG2 Figure 15 The display device 200 includes the display panel 100 of any of the above-mentioned embodiments. The display device 200 provided in the embodiments of the present disclosure can be any electronic device with a display function, such as a touch screen display, a mobile phone, a tablet computer, a laptop computer, an e-reader, or a television. The display device 200 provided in the embodiments of the present disclosure has the beneficial effects of the display panel provided in the embodiments of the present disclosure. For details, please refer to the detailed description of the display panel in the above-mentioned embodiments, and this embodiment will not be repeated here.

[0090] It is understandable that Figure 15 Only a rectangular structure is used as an example to illustrate one shape of the display device 200. In some other embodiments of the present disclosure, the display device 200 may also be circular, elliptical or any other feasible shape, and the present disclosure does not specifically limit this.

[0091] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0092] The foregoing description is intended only to provide specific embodiments of the present disclosure, intended to enable those skilled in the art to understand and implement the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is not intended to be limited to the embodiments described herein, but rather to be construed in the broadest manner consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, characterized in that: The device comprises a light-emitting element and a pixel circuit connected to the light-emitting element, wherein the light-emitting element comprises a first light-emitting element and a second light-emitting element, and the first light-emitting element and the second light-emitting element emit different colors; the pixel circuit comprises a first pixel circuit and a second pixel circuit, the first pixel circuit is electrically connected to the first light-emitting element, and the second pixel circuit is electrically connected to the second light-emitting element; The pixel circuit includes a driving transistor and a first light-emitting control transistor, wherein a first electrode of the driving transistor is coupled to a first power supply terminal, a second electrode of the driving transistor is coupled to a first electrode of the light-emitting element through the first light-emitting control transistor, and a second electrode of the light-emitting element is coupled to a second power supply terminal; In the first pixel circuit, the channel width-to-length ratio of the driving transistor is A1, and the channel width-to-length ratio of the first light-emitting control transistor is K1; in the second pixel circuit, the channel width-to-length ratio of the driving transistor is A2, and the channel width-to-length ratio of the first light-emitting control transistor is K2; wherein, A1 / K1≠A2 / K2.

2. The display panel according to claim 1, wherein: The turn-on voltage of the first light-emitting element is lower than the turn-on voltage of the second light-emitting element, A1 / K1>A2 / K2.

3. The display panel according to claim 2, wherein: A1>A2, and K1=K2.

4. The display panel according to claim 3, wherein: The channel width of the driving transistor in the first pixel circuit is greater than the channel width of the driving transistor in the second pixel circuit, and the channel length of the driving transistor in the first pixel circuit is equal to the channel length of the driving transistor in the second pixel circuit.

5. The display panel according to claim 4, wherein: In the driving transistor corresponding to the first pixel circuit, the source and drain are connected to the active layer through n1 connection holes; in the driving transistor corresponding to the second pixel circuit, the source and drain are connected to the active layer through n2 connection holes, where n1>n2.

6. The display panel according to claim 3, wherein: The driving transistor in the first pixel circuit includes m1 sub-transistors connected in parallel, and the driving transistor in the second pixel circuit includes m2 sub-transistors connected in parallel, wherein m1>m2.

7. The display panel according to claim 3, wherein: A channel length of the driving transistor in the first pixel circuit is smaller than a channel length of the driving transistor in the second pixel circuit, and a channel width of the driving transistor in the first pixel circuit is equal to a channel width of the driving transistor in the second pixel circuit.

8. The display panel according to claim 2, wherein: K1<K2, A1=A2.

9. The display panel according to claim 8, wherein: The channel width of the first light-emitting control transistor in the first pixel circuit is smaller than the channel width of the first light-emitting control transistor in the second pixel circuit, and the channel length of the first light-emitting control transistor in the first pixel circuit is equal to the length of the first light-emitting control transistor in the second pixel circuit.

10. The display panel according to claim 8, wherein The channel length of the first light-emitting control transistor corresponding to the first pixel circuit is greater than the channel length of the first light-emitting control transistor corresponding to the second pixel circuit, and the channel width of the first light-emitting control transistor corresponding to the first pixel circuit is equal to the channel width of the first light-emitting control transistor corresponding to the second pixel circuit.

11. The display panel according to claim 8, wherein In the driving transistor corresponding to the first pixel circuit, the source and drain are connected to the active layer through n1 connection holes; in the driving transistor corresponding to the second pixel circuit, the source and drain are connected to the active layer through n2 connection holes, where n1=n2.

12. The display panel according to claim 2, wherein: A1>A2, K1<K2.

13. The display panel according to claim 12, wherein: The channel width of the driving transistor in the first pixel circuit is greater than the channel width of the driving transistor in the second pixel circuit; The channel width of the first light-emitting control transistor in the first pixel circuit is smaller than the channel width of the first light-emitting control transistor in the second pixel circuit, and / or the channel length of the first light-emitting control transistor in the first pixel circuit is greater than the channel length of the first light-emitting control transistor in the second pixel circuit.

14. The display panel according to claim 12, wherein: A channel length of the driving transistor in the first pixel circuit is smaller than a channel length of the driving transistor in the second pixel circuit; The channel width of the first light-emitting control transistor in the first pixel circuit is smaller than the channel width of the first light-emitting control transistor in the second pixel circuit, and / or the channel length of the first light-emitting control transistor in the first pixel circuit is greater than the channel length of the first light-emitting control transistor in the second pixel circuit.

15. The display panel according to claim 2, wherein: A1 / K1=m*A2 / K2, where 1<m≤6.

16. The display panel according to claim 1, wherein The first light-emitting element is a red light-emitting element, and the second light-emitting element is one of a green light-emitting element and a blue light-emitting element.

17. The display panel according to claim 1, wherein: The light-emitting element further includes a third light-emitting element, and the light-emitting color of the third light-emitting element is different from the light-emitting color of the first light-emitting element and the second light-emitting element; the pixel circuit further includes a third pixel circuit, and the third light-emitting element is electrically connected to the third pixel circuit; in the third pixel circuit, the channel width-to-length ratio of the driving transistor is A3, and the channel width-to-length ratio of the first light-emitting control transistor is K3; the turn-on voltage of the first light-emitting element is less than the turn-on voltage of the second light-emitting element, and the turn-on voltage of the second light-emitting element is less than or equal to the turn-on voltage of the third light-emitting element; A1 / K1=m*A2 / K2, A2 / K2=n*A3 / K3, m>n≥1.

18. The display panel according to claim 17, wherein: m≤6。 19. The display panel according to claim 17, wherein: The first light-emitting element is a red light-emitting element, the second light-emitting element is one of a green light-emitting element and a blue light-emitting element, and the third light-emitting element is the other of the green light-emitting element and the blue light-emitting element.

20. The display panel according to claim 1, wherein The display panel includes multiple pixel units, one pixel unit includes a first pixel circuit and a second pixel circuit, the first pixel circuit and the second pixel circuit in one pixel unit are adjacent, the first pixel circuit is connected to a first data line, and the second pixel circuit is connected to a second data line; along the arrangement direction of the first pixel circuit and the second pixel circuit, the first data line and the second data line are located between the first pixel circuit and the second pixel circuit.

21. The display panel according to claim 20, wherein: The pixel unit also includes a third pixel circuit. In the same pixel unit, the third pixel circuit is located on a side of the second pixel circuit away from the first pixel circuit. The third pixel circuit is connected to a third data line, and the third data line is located between the second pixel circuit and the third pixel circuit.

22. A display device, characterized in that: A display panel comprising any one of claims 1-21.

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