Display panel and display device

Abstract

The application provides a display panel and a display device, wherein a display area of the display panel comprises an optical component area and a conventional display area, and the optical component area and the conventional display area both comprise light emitting devices, so that the area of the display area is larger, and the trend of full screen display is met. In the application, at least the channel of the first driving transistor corresponding to the first blue pixel is rectangular, and the display effect of the display panel can be improved.

Description

[0001] This application is a divisional application of a patent application with the application date of July 28, 2020, the application number of 202010738054.3, and the invention title of "a display panel and a display device". TECHNICAL FIELD

[0002] The present application relates to the technical field of display, more specifically, to a display panel and a display device. BACKGROUND

[0003] With the continuous development of display technology, consumers' requirements for display panels are constantly improving, and various display panels are emerging and developing rapidly, such as liquid crystal display panels, organic light-emitting display panels, etc. On this basis, 3D display, touch display, curved display, ultra-high resolution display, and anti-peep display technologies are constantly emerging to meet the needs of consumers.

[0004] In recent years, in addition to the traditional role of information display, the appearance requirements of display panels are also gradually improving, and a larger screen ratio is the trend of the future market, so display panels with under-screen camera structures are favored by consumers. In the display panel with the under-screen camera structure, the camera is arranged below the display area of the display panel, and light can pass through the display area of the display panel to the camera to make the camera take pictures. However, the display effect of the display panel is deteriorated by arranging the under-screen camera structure in the display panel. SUMMARY

[0005] Therefore, the present application provides a display panel and a display device, which effectively solve the technical problems existing in the related art, improve the chroma uniformity of the display panel in the optical component area, and further improve the display effect of the display panel.

[0006] To achieve the above-mentioned purpose, the technical solutions provided by the present application are as follows:

[0007] A display panel comprises:

[0008] A plurality of pixels, the plurality of pixels comprising a first pixel and a second pixel, the first pixel comprising a first light-emitting device and a first pixel circuit connected to each other, and the first pixel circuit comprising a first drive transistor, the second pixel comprising a second light-emitting device and a second pixel circuit connected to each other, and the second pixel circuit comprising a second drive transistor;

[0009] A display area, the display area comprising an optical component area and a regular display area, the first light-emitting device being located in the optical component area, and the second light-emitting device being located in the regular display area;

[0010] Among the first blue pixel corresponding first drive transistor, the first red pixel corresponding first drive transistor and the first green pixel corresponding first drive transistor, at least the channel of the first blue pixel corresponding first drive transistor is rectangular.

[0011] Correspondingly, based on the same inventive concept, the application also provides a display device, which comprises the display panel.

[0012] Compared with the prior art, the technical scheme provided by the application has at least the following advantages:

[0013] The application provides a display panel and a display device, the display area of the display panel comprises an optical component area and a conventional display area, and the optical component area and the conventional display area both comprise light emitting devices, so that the area of the display area is larger, meeting the full-screen display trend. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the application or the related art, the following will briefly introduce the drawings needed to be used in the embodiments or the related art description. Obviously, the drawings in the following description are only the embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0015] Figure 1 A structural schematic diagram of a display panel provided by the embodiment of the application is shown in the figure.

[0016] Figure 2 A structural schematic diagram of a display device provided by the embodiment of the application is shown in the figure.

[0017] Figure 3 A structural schematic diagram of another display panel provided by the embodiment of the application is shown in the figure.

[0018] Figure 4 A structural schematic diagram of a pixel circuit provided by the embodiment of the application is shown in the figure.

[0019] Figure 5 A timing diagram provided by the embodiment of the application is shown in the figure.

[0020] Figure 6 A structural schematic diagram of another pixel circuit provided by the embodiment of the application is shown in the figure.

[0021] Figure 7 Another timing diagram provided by the embodiment of the application is shown in the figure.

[0022] Figure 8 FIG. 1 shows a structural schematic diagram of a display panel according to an embodiment of the present application;

[0023] Figure 9 FIG. 2 shows a structural schematic diagram of a channel of a transistor according to an embodiment of the present application;

[0024] Figure 10 FIG. 3 shows another structural schematic diagram of a channel of a transistor according to an embodiment of the present application;

[0025] Figure 11 FIG. 4 shows a structural schematic diagram of a display device according to an embodiment of the present application. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0027] As described in the background, in recent years, in addition to the traditional information display and other functions, the appearance requirements of display panels are also gradually increasing, and a larger screen ratio is the trend of the future market, so display panels with an under-screen camera structure are favored by consumers. In a display panel with an under-screen camera structure, the camera is arranged below the display area of the display panel, and light can pass through the display area of the display panel to the camera to enable the camera to capture a picture. However, the arrangement of the under-screen camera structure in the display panel degrades the display effect of the display panel.

[0028] Based on this, the embodiments of the present application provide a display panel and a display device, which effectively solve the technical problems existing in the related art, improve the chroma uniformity of the display panel at the optical component area, and further improve the display effect of the display panel.

[0029] To achieve the above object, the technical solutions provided by the embodiments of the present application are as follows, which are specifically combined with Figures 1 to 11 The technical solutions provided by the embodiments of the present application are described in detail.

[0030] Reference Figure 1 FIG. 1 shows a structural schematic diagram of a display panel according to an embodiment of the present application, wherein the display panel provided by the embodiments of the present application comprises:

[0031] A plurality of pixels, the plurality of pixels comprising a first pixel and a second pixel, the first pixel comprising a first light emitting device 110 and a first pixel circuit 120 connected to each other, and the first pixel circuit 120 comprising a first drive transistor, the second pixel comprising a second light emitting device 210 and a second pixel circuit 220 connected to each other, and the second pixel circuit 220 comprising a second drive transistor.

[0032] A display area, the display area comprising an optical component area 101 and a regular display area 102, the first light emitting device 110 being located in the optical component area 101, the second light emitting device 210 being located in the regular display area 102, a light emitting device density of the optical component area 101 being less than a light emitting device density of the regular display area 102.

[0033] The first pixel comprises a first blue pixel b1, a first red pixel r1 and a first green pixel g1, a width-length ratio of the first drive transistor corresponding to the first blue pixel b1 being R1, a width-length ratio of the first drive transistor corresponding to the first red pixel r1 being R2, and a width-length ratio of the first drive transistor corresponding to the first green pixel g1 being R3, wherein R1>R2>0 and / or R1>R3>0.

[0034] It should be noted that the optical component area provided by the embodiment of the present application can be provided with an optical component such as a camera, and the present application does not make specific limitations thereon, and specific design should be made according to actual application. Figure 2 As shown in the display device structure diagram, the display device comprises a display panel 1 and an optical device 2, wherein the display panel 1 comprises an optical component area 101, the optical device 2 is arranged on a non-light-emitting side of the display panel 1, and the optical device 2 is arranged at the optical component area 101. Optionally, the optical device 2 can be a camera.

[0035] It can be understood that the display area of the display panel provided by the embodiment of the present application includes the optical component area and the conventional display area, and the optical component area and the conventional display area both include light emitting devices, so that the area of the display area is larger, and the trend of full screen display is met. Moreover, at the optical component area provided by the embodiment of the present application, the width-length ratio of the first driving transistor corresponding to the first blue pixel is greater than the width-length ratio of the first driving transistor corresponding to the first red pixel, and / or the width-length ratio of the first driving transistor corresponding to the first blue pixel is greater than the width-length ratio of the first driving transistor corresponding to the first green pixel; that is, at the optical component area provided by the embodiment of the present application, the width-length ratio of the first driving transistor corresponding to the first blue pixel is greater than the width-length ratio of the first driving transistor corresponding to the first red pixel; or, at the optical component area provided by the embodiment of the present application, the width-length ratio of the first driving transistor corresponding to the first blue pixel is greater than the width-length ratio of the first driving transistor corresponding to the first green pixel; or, at the optical component area provided by the embodiment of the present application, the width-length ratio of the first driving transistor corresponding to the first blue pixel is greater than the width-length ratio of the first driving transistor corresponding to the first red pixel, and the width-length ratio of the first driving transistor corresponding to the first blue pixel is greater than the width-length ratio of the first driving transistor corresponding to the first green pixel. Further, by increasing the width-length ratio of the first driving transistor corresponding to the first blue pixel, the light emitting efficiency of the first blue pixel is improved, and the purpose of improving the chroma uniformity of the display panel at the optical component area is achieved, and the display effect of the display panel is improved.

[0036] The calculation formula of the saturation region current I of the specific transistor is as follows:

[0037] I = (1 / 2)Un*Cox*(W / L)*(|Vgs|-|Vth|) 2

[0038] Wherein, Un is the mobility of the transistor channel electron, Cox is the capacitance of the unit area gate oxide layer of the transistor, W / L is the width-length ratio of the transistor channel, Vgs is the gate-source voltage of the transistor, and Vth is the threshold voltage of the transistor. According to the calculation formula of the saturation region current I of the transistor, increasing the width-length ratio W / L of the transistor can improve the saturation region current I of the transistor, and further improve the light emitting efficiency of the light emitting device electrically connected with the transistor. The test data of a transistor is shown in Table 1 as follows:

[0039]

[0040]

[0041] Table 1

[0042] Table 1 shows that the larger the aspect ratio of the transistor, the larger the current when it operates in the saturation region. Table 2 below shows experimental data on color deviation values ​​for different display images of the display panel. In Table 2, the aspect ratio of the driving transistors corresponding to the blue, red, and green pixels in Comparative Example 1 is 3 μm / 19.435 μm, and the aspect ratio of the driving transistors corresponding to the red and green pixels in Comparative Example 2 is 3 μm / 19.435 μm, and the aspect ratio of the driving transistor corresponding to the blue pixel is 3 μm / 12 μm:

[0043] Display screen Color shift value of Comparative Example 1 Color shift value of Comparative Example 2 32 gray scale white screen 0.0110 0.00091 64 gray scale white screen 0.0089 0.00067 127 gray scale white screen 0.0075 0.00053 255 gray scale white screen 0.0067 0.00051 255 gray scale red screen 0.0049 0.00015 255 gray scale green screen 0.0034 0.00014 255 gray scale blue screen 0.0056 0.00022

[0044] Table 2

[0045] Table 2 shows that when the width-to-length ratio of the driving transistor corresponding to the blue pixel is larger, the color deviation of the image displayed by the display panel is reduced. Therefore, combining the experimental data in Tables 1 and 2, it can be seen that by increasing the width-to-length ratio of the first driving transistor corresponding to the first blue pixel in the embodiment of the present invention, the luminous efficiency of the first light-emitting device corresponding to the first blue pixel can be improved. Moreover, by increasing the luminous efficiency of the first light-emitting device corresponding to the first blue pixel, the color uniformity of the display panel in the optical component area can be improved, thereby improving the display quality of the display panel.

[0046] In one embodiment of the present invention, 2≤R1 / R2≤4 and 2≤R1 / R3≤4 are provided. That is, the ratio of the width-to-length ratio R1 of the first driving transistor corresponding to the first blue pixel to any of the width-to-length ratios R2 of the first driving transistor corresponding to the first red pixel and R3 of the first driving transistor corresponding to the first green pixel is not less than 2 and not greater than 4. Furthermore, the channel width of the first driving transistor corresponding to the first red pixel is W2, the channel width of the first driving transistor corresponding to the first green pixel is W3, the channel length of the first driving transistor corresponding to the first red pixel is L2, and the channel length of the first driving transistor corresponding to the first green pixel is L3, wherein |W2-W3|≤0.5μm and |L2-L3|≤0.5μm. By optimizing the ratio and size of the width-to-length ratios of the first driving transistors corresponding to the first blue pixel, the first red pixel, and the first green pixel, high color uniformity of the display panel in the optical component area is ensured.

[0047] like Figure 1 As shown, the first light emitting device 110 and the first pixel circuit 120 provided in the embodiment of the present invention can both be disposed in the optical component area 101. Alternatively, the first light emitting device provided in the embodiment of the present invention can be disposed in the optical component area, and the first pixel circuit connected to the first light emitting device can be disposed in the conventional display area; for details, see Figure 3As shown, the display panel provided by the embodiment of the present application comprises a display area, and the display area comprises an optical component area 101 and a normal display area 102, wherein the first light emitting device 110 is located in the optical component area 101, and the first pixel circuit 120 connected with the first light emitting device 110 is located outside the optical component area 101, thereby further improving the light transmission area of the optical component area and ensuring the effect of the device when the display panel is arranged at the optical component area. Optionally, the first pixel circuit 120 connected with the first light emitting device 110 is located between the normal display area 102 and the optical component area 101.

[0048] The pixel driving circuit provided by the embodiment of the present application is electrically connected with the light emitting device (i.e., the first pixel driving circuit is electrically connected with the first light emitting device, and the second pixel driving circuit is electrically connected with the second light emitting device), wherein the pixel driving circuit comprises a plurality of other transistors and capacitors in addition to the driving transistor, and all the transistors and capacitors work cooperatively to provide a driving current for the light emitting device, so that the light emitting device emits light in response to the driving current. The circuit composition of the first pixel driving circuit and the second pixel driving circuit provided by the embodiment of the present application can be the same, and reference is made to the circuit composition of the pixel driving circuit provided by the embodiment of the present application. Figure 4 As shown, the structure schematic diagram of the pixel driving circuit provided by the embodiment of the present application comprises: a driving transistor T0, a reset module 10, a data writing module 20, a control light emitting module 30 and a storage module 40 electrically connected with the driving transistor T0. The reset module 10 is used for transmitting a first reference voltage Vref1 to the gate of the driving transistor T0, so as to reset the gate potential of the driving transistor T0; the data writing module 20 is used for writing a data voltage Vdata to the first end of the driving transistor T0; the control light emitting module 30 is used for transmitting the driving current generated by the driving transistor T0 to the light emitting device 50, so as to make the light emitting device 50 emit light in response to the driving current; and the storage module 40 is used for keeping the voltage at the gate of the driving transistor T0. Optionally, the display panel provided by the embodiment of the present application is an organic light emitting display panel. Optionally, the transistors provided by the embodiment of the present application are all thin film transistors.

[0049] As shown in the above-mentioned structure schematic diagram of the pixel driving circuit, the reset module 10 comprises a first transistor T1, the data writing module 20 comprises a second transistor T2, the control light emitting module 30 comprises a third transistor T3, and the storage module 40 comprises a fourth transistor T4. Figure 4As shown, the reset module 10 provided by the embodiment of the present application comprises a reset transistor T1, the first end of the reset transistor T1 is connected to a first reference voltage Vref1, the gate of the reset transistor T1 is electrically connected to a first control signal S1, and the second end of the reset transistor T1 is electrically connected to the gate of the driving transistor T0. The data writing module 20 comprises a first data writing transistor T2 and a second data writing transistor T3, the gates of the first data writing transistor T2 and the second data writing transistor T3 are electrically connected to a second control signal S2, the first end of the first data writing transistor T2 is connected to a data voltage Vdata, and the second end of the first data writing transistor T2 is electrically connected to the first end of the driving transistor T0; the first end of the second data writing transistor T3 is electrically connected to the gate of the driving transistor T0, and the second end of the second data writing transistor T3 is electrically connected to the second end of the driving transistor T0; the control light emitting module 30 comprises a first control light emitting transistor T4 and a second control light emitting transistor T5, the gates of the first control light emitting transistor T4 and the second control light emitting transistor T5 are electrically connected to a third control signal S3, the first end of the first control light emitting transistor T4 is connected to a first voltage, the second end of the first control light emitting transistor T4 is electrically connected to the first end of the driving transistor T0, the first end of the second control light emitting transistor T5 is electrically connected to the second end of the driving transistor T0, the second end of the second control light emitting transistor T5 is electrically connected to the first end of the light emitting device 50, and the second end of the light emitting device 50 is connected to a second voltage V2; and the storage module 40 comprises a storage capacitor C, the first plate of the storage capacitor C is connected to the first voltage V1, and the second plate of the storage capacitor C is electrically connected to the gate of the driving transistor T0.

[0050] In combination Figure 4 And Figure 5 As shown, Figure 5 A timing diagram is provided by the embodiment of the present application, wherein the embodiment of the present application takes the example of all transistors of the pixel circuit being P-type transistors (i.e. the transistor is turned on when the control signal connected to the gate of the transistor is at a low level, and the transistor is turned off when the control signal is at a high level), and the working process of the pixel driving circuit provided by the embodiment of the present application comprises a reset stage M1, a data writing stage M2 and a light emitting stage M3 performed in sequence:

[0051] In the reset stage M1, the reset transistor T1 is turned on to transmit the first reference voltage Vref1 to the gate of the driving transistor T0, at this time, the transistors of the data writing module 20 and the control light emitting module 30 are all turned off; wherein the first reference voltage Vref1 is a voltage capable of controlling the driving transistor T0 to be turned on.

[0052] In the data writing phase M2, the transistor controlling the light emitting module 30 and the reset transistor T1 are both turned off, while the first data writing transistor T2 and the second data writing transistor T3 are turned on. The first data writing transistor T2 outputs the data voltage Vdata to the first terminal of the driving transistor T0, while the second data writing transistor T3 connects the gate of the driving transistor T0 to the second terminal.

[0053] In the light-emitting phase M3, the transistors of the data writing module 20 and the reset transistor T1 are turned off. The first control light-emitting transistor T4 and the second control light-emitting transistor T5 are turned on, forming a path for the first voltage V1, the first control light-emitting transistor T4, the driving transistor T0, the second control light-emitting transistor T5, the light-emitting device 50, and the second voltage V2. The driving current generated by the driving transistor T0 is transmitted to the light-emitting device 50, and the light-emitting device 50 emits light in response to the driving current.

[0054] Furthermore, the pixel circuit provided by the embodiment of the present invention may further include a black state maintaining module, referring to Figure 6 FIG. 1 is a schematic diagram of another pixel circuit according to an embodiment of the present invention, wherein the pixel circuit further comprises a black state maintaining module 60 electrically connected to the light emitting device, and the black state maintaining module 60 is used to transmit the second reference voltage Vref2 to the light emitting device 50 to control the light emitting device 50 to maintain the black state off state outside the light emitting phase. Figure 6 As shown, the black state maintenance module 60 provided in the embodiment of the present invention includes a black state maintenance transistor T6, the gate of the black state maintenance transistor T6 is electrically connected to the fourth control signal S4, the first end of the black state maintenance transistor T6 is connected to the second reference signal Vref2, and the second end of the black state maintenance transistor T6 is electrically connected to the first end of the light emitting device 50. Figure 6 The pixel circuit shown includes Figure 4 The pixel circuit shown has the same reset phase M1, data writing phase M2 and light emitting phase M3 as shown in FIG. Figure 7 Another timing diagram provided by an embodiment of the present invention is shown, in which during the reset phase M1 and the data writing phase M2, the black state holding transistor T6 is controlled to be turned on by the fourth control signal S4. The black state holding transistor T6 then transmits the second reference voltage Vref2 to the first terminal of the light-emitting device 50 to control the light-emitting device 50 to remain in the black state and extinguished state, thereby preventing the black state from not being dimmed during the reset phase and the data writing phase. Furthermore, during the light-emitting phase M3, the black state holding transistor T6 is controlled to be turned off by the fourth control signal S4 to ensure normal light emission of the light-emitting device 50.

[0055] It should be noted that the embodiment of the present application does not make specific limitation to the specific circuit of the pixel circuit, and other circuit connection structures can also be used in other embodiments of the present application. In addition, the driving transistor, the reset transistor, the data writing transistor, the control light emitting transistor and the black state maintaining transistor provided by the embodiment of the present application can all be P-type thin film transistors, or the driving transistor, the reset transistor, the data writing transistor, the control light emitting transistor and the black state maintaining transistor can all be N-type thin film transistors. In addition, the first voltage provided by the embodiment of the present application is the voltage provided by the anode voltage terminal, and the second voltage is the voltage provided by the cathode voltage terminal. In addition, the light emitting device can be a light emitting diode, and the present application does not make specific limitation thereto.

[0056] Further, the present application can further optimize the design of the transistors, storage capacitors and other components in the first pixel circuit and / or the second pixel circuit to improve the performance of the pixel circuit and the display effect of the display panel. Specifically, the first pixel circuit provided by the embodiment of the present application includes a reset module, a data writing module and a control light emitting module electrically connected with the first driving transistor. The reset module includes at least one reset transistor electrically connected with the first driving transistor. The data writing module includes at least one data writing transistor electrically connected with the first driving transistor. The control light emitting module includes at least one control light emitting transistor electrically connected with the first driving transistor. The width-length ratio of the corresponding control light emitting transistor of the first pixel circuit provided by the embodiment of the present application is greater than the width-length ratio of the reset transistor and the data writing transistor in the same first pixel circuit.

[0057] In addition, the first pixel circuit provided by the embodiment of the present application further includes a black state maintaining module electrically connected with the first light emitting device. The black state maintaining module includes at least one black state maintaining transistor electrically connected with the first light emitting device. The width-length ratio of the corresponding control light emitting transistor of the first pixel circuit is greater than the width-length ratio of the black state maintaining transistor in the same first pixel circuit.

[0058] It can be understood that the control light emitting module provided by the embodiment of the present application is used to control the driving current generated by the first driving transistor to be transmitted to the first light emitting device, so that the light emitting device can emit light in response to the driving current. The control light emitting transistor of the control light emitting module is connected in series with the first driving transistor, so that the current transmitted by the control light emitting transistor is large. The width-length ratio of the control light emitting transistor in the first pixel circuit is made to be greater than the width-length ratio of the reset transistor, the data writing transistor and the black state maintaining transistor in the first pixel circuit, so as to improve the stability of the control light emitting transistor and improve the stability of the first pixel circuit. Optionally, the width-length ratio of the corresponding control light emitting transistor of the first pixel circuit provided by the embodiment of the present application is R kwherein, 4≤R k ≤6.

[0059] In an embodiment of the present application, the width-length ratio of the light-emitting transistor controlled by the first blue pixel is R k 1, the width-length ratio of the light-emitting transistor controlled by the first red pixel is R k 2, and the width-length ratio of the light-emitting transistor controlled by the first green pixel is R k 3; wherein, when R1>R2>0, R k 1>R k 2>0; and when R1>R3>0, R k 1>R k 3>0.

[0060] It can be understood that the width-length ratio of the first driving transistor corresponding to the first blue pixel is greater than the width-length ratio of the first driving transistor corresponding to the first red pixel, and / or the width-length ratio of the first driving transistor corresponding to the first blue pixel is greater than the width-length ratio of the first driving transistor corresponding to the first green pixel; and when the width-length ratio of the first driving transistor corresponding to the first blue pixel is greater than the width-length ratio of the first driving transistor corresponding to the first red pixel, the width-length ratio of the light-emitting transistor controlled by the first blue pixel is made greater than the width-length ratio of the light-emitting transistor controlled by the first red pixel, and when the width-length ratio of the first driving transistor corresponding to the first blue pixel is greater than the width-length ratio of the first driving transistor corresponding to the first green pixel, the width-length ratio of the light-emitting transistor controlled by the first blue pixel is made greater than the width-length ratio of the light-emitting transistor controlled by the first green pixel, so that the first pixel circuit corresponding to the first blue pixel further improves the stability of the first pixel circuit on the basis of transmitting greater current by the light-emitting transistor controlled by the first blue pixel.

[0061] In an embodiment of the present application, the first pixel circuit comprises a first storage capacitor electrically connected to the gate of the first driving transistor; the second pixel circuit comprises a second storage capacitor electrically connected to the gate of the second driving transistor; and the capacitance of the first storage capacitor is greater than the capacitance of the second storage capacitor.

[0062] It can be understood that the light emitting device density of the regular display area is greater than the light emitting device density of the optical component area, in order to improve the display brightness at the optical component area, it is often necessary to increase the driving current generated by the first driving transistor, and then increase the driving current to achieve the purpose of improving the light emitting efficiency of the first light emitting device; that is, under the same gray scale and the same color pixel conditions, the ratio of the driving current of the first light emitting device to the driving current of the second light emitting device is the ratio of the light emitting device density of the regular display area to the light emitting device density of the optical component area. Further, the first storage capacitor provided by the embodiment of the application is provided with a capacitance greater than the capacitance of the second storage capacitor, which can ensure that the first storage capacitor has high potential holding capacity for the gate of the first driving transistor, and further ensure that the stability of the first pixel circuit is high on the basis of ensuring that the overall brightness uniformity of the display panel is high. Optionally, the capacitance of the first storage capacitor is C1, and the capacitance of the second storage capacitor is C2, wherein 2≤C1 / C2≤4.

[0063] In an embodiment of the application, as shown in Figure 1 The second pixel provided by the application includes a second blue pixel b2, a second red pixel r2 and a second green pixel g2, the width-length ratio of the corresponding second driving transistor of the second blue pixel b2 is R1', the width-length ratio of the corresponding second driving transistor of the second red pixel r2 is R2', and the width-length ratio of the corresponding second driving transistor of the second green pixel g2 is R3', wherein R1'>R2'>0 and / or R1'>R3'>0.

[0064] It can be understood that, at the regular display area provided by the embodiment of the present application, the width-length ratio of the second driving transistor corresponding to the second blue pixel is greater than the width-length ratio of the second driving transistor corresponding to the second red pixel, and / or the width-length ratio of the second driving transistor corresponding to the second blue pixel is greater than the width-length ratio of the second driving transistor corresponding to the second green pixel; that is, at the regular display area provided by the embodiment of the present application, the width-length ratio of the second driving transistor corresponding to the second blue pixel is greater than the width-length ratio of the second driving transistor corresponding to the second red pixel; or, at the regular display area provided by the embodiment of the present application, the width-length ratio of the second driving transistor corresponding to the second blue pixel is greater than the width-length ratio of the second driving transistor corresponding to the second green pixel; or, at the regular display area provided by the embodiment of the present application, the width-length ratio of the second driving transistor corresponding to the second blue pixel is greater than the width-length ratio of the second driving transistor corresponding to the second red pixel, and the width-length ratio of the second driving transistor corresponding to the second blue pixel is greater than the width-length ratio of the second driving transistor corresponding to the second green pixel. Further, by increasing the width-length ratio of the second driving transistor corresponding to the second blue pixel, the light-emitting efficiency of the second blue pixel is improved, and the color uniformity of the display panel at the regular display area is improved, so that the color uniformity of the display panel at the regular display area and the optical component area is ensured, and the display effect of the display panel is further improved. Optionally, the channel width of the second driving transistor corresponding to the second red pixel is W2', the channel width of the second driving transistor corresponding to the second green pixel is W3', the channel length of the second driving transistor corresponding to the second red pixel is L2', and the channel length of the second driving transistor corresponding to the second green pixel is L3', wherein |W2'-W3'|≤0.5 μm and |L2'-L3'|≤0.5 μm.

[0065] Further, when R1'>R2'>0, the width-length ratio of the control light-emitting transistor of the second blue pixel is greater than the width-length ratio of the control light-emitting transistor of the second red pixel; and when R1'>R3'>0, the width-length ratio of the control light-emitting transistor of the second blue pixel is greater than the width-length ratio of the control light-emitting transistor of the second green pixel.

[0066] In an embodiment of the present application, the width-length ratio of the first driving transistor corresponding to the first blue pixel is greater than the width-length ratio of the second driving transistor corresponding to the second blue pixel; the width-length ratio of the first driving transistor corresponding to the first red pixel is greater than the width-length ratio of the second driving transistor corresponding to the second red pixel; and the width-length ratio of the first driving transistor corresponding to the first green pixel in the optical component area is greater than the width-length ratio of the second driving transistor corresponding to the second green pixel. That is, R1>R1', R2>R2', and R3>R3'.

[0067] Furthermore, the width-to-length ratio of the light-emitting transistor controlled by the first blue pixel is greater than the width-to-length ratio of the light-emitting transistor controlled by the second blue pixel, the width-to-length ratio of the light-emitting transistor controlled by the first red pixel is greater than the width-to-length ratio of the light-emitting transistor controlled by the second red pixel, and the width-to-length ratio of the light-emitting transistor controlled by the first green pixel is greater than the width-to-length ratio of the light-emitting transistor controlled by the second green pixel, thereby improving the stability of the first pixel circuit.

[0068] It will be appreciated that in the embodiments of the present invention, by making the aspect ratio of the first drive transistor corresponding to any color pixel greater than the aspect ratio of the second drive transistor corresponding to the same color pixel, the drive current generated by the first drive transistor is increased, thereby improving the luminous efficiency of the first light-emitting device corresponding to the first pixel, improving the overall display brightness of the optical component area of ​​the display panel, and achieving the purpose of improving the uniformity of the overall display brightness of the display panel. Optionally, in the embodiments of the present invention, the ratio of the aspect ratio of the first drive transistor corresponding to any color pixel to the aspect ratio of the second drive transistor corresponding to the same color pixel is S, where 3.5≤S≤5.

[0069] Furthermore, the aspect ratio of the first driving transistor corresponding to any color pixel provided by the embodiment of the present invention is greater than the aspect ratio of the second driving transistor corresponding to the same color pixel, so that the expected driving current can be generated by applying a smaller cross-voltage to the first driving transistor. Therefore, the first pixel circuit and the second pixel circuit provided by the embodiment of the present invention can be externally connected to the same voltage terminal, which can reduce the wiring difficulty of the display panel and reduce the power consumption of the first pixel circuit. Figure 8 As shown, it is a structural schematic diagram of another display panel provided by an embodiment of the present invention, wherein any one of the first pixel circuit 120 and the second pixel circuit 220 provided by the embodiment of the present invention includes an anode voltage terminal and a cathode voltage terminal, wherein the anode voltage terminal of the first pixel circuit 120 and the anode voltage terminal of the second pixel circuit 220 are both electrically connected to the same voltage terminal PVDD; and the cathode voltage terminal of the first pixel circuit 120 and the cathode voltage terminal of the second pixel circuit 220 are both electrically connected to the same voltage terminal PVEE.

[0070] refer to Figure 9 As shown in the figure, it is a structural schematic diagram of the channel of a transistor provided in an embodiment of the present invention, wherein among the first blue pixel corresponding first driving transistor, the first red pixel corresponding first driving transistor and the first green pixel corresponding first driving transistor provided in an embodiment of the present invention, at least the channel 70 of the first blue pixel corresponding first driving transistor is rectangular, and the expected proportion is achieved by optimizing the width W and length L of the channel 70.

[0071] It can be understood that when the aspect ratio of a transistor provided by the above embodiment of the present invention is greater than the aspect ratio of another transistor, such as the aspect ratio of the first driving transistor of the first blue pixel can be greater than the aspect ratio of the first driving transistor of the first red pixel and the aspect ratio of the first driving transistor of the first green pixel; the aspect ratio of the second driving transistor of the second blue pixel can be greater than the aspect ratio of the second driving transistor of the second red pixel and the aspect ratio of the first driving transistor of the second green pixel; the aspect ratio of the first driving transistor of the first blue pixel can be greater than the aspect ratio of the second driving transistor of the second blue pixel, the aspect ratio of the first driving transistor of the first red pixel can be greater than the aspect ratio of the second driving transistor of the second red pixel, the aspect ratio of the first driving transistor of the first green pixel can be greater than the aspect ratio of the second driving transistor of the second green pixel, etc., the purpose of changing the aspect ratio of the transistor can be achieved by changing the channel shape. Specifically, a transistor with a larger aspect ratio can be used as follows Figure 9 The transistor is made in the manner of a rectangular channel as shown, while a transistor with a smaller aspect ratio can be made in the manner of Figure 10 The transistor is manufactured in a manner having a meandering channel (eg, an X-shaped channel). On the basis of the same channel width W, the length L of the meandering channel is greater than that of the rectangular channel.

[0072] Alternatively, on the basis of the same channel shape of the transistor, the embodiments of the present invention may also adopt a method of increasing the width of the channel and reducing the length of the channel, or a method of keeping the width of the channel unchanged and reducing the length of the channel, or a method of increasing the width of the channel and keeping the length of the channel unchanged, to achieve the purpose of increasing the aspect ratio of the transistor, and the present invention does not impose specific restrictions on this.

[0073] Correspondingly, the present invention further provides a display device. The display device provided in an embodiment of the present invention includes the display panel described in any one of the above embodiments.

[0074] refer to Figure 11 , which is a schematic structural diagram of a display device provided in an embodiment of the present invention. The display device provided in an embodiment of the present invention may be a mobile terminal 1000, which includes a display panel provided in any one of the above embodiments.

[0075] It should be noted that the display device provided in the embodiment of the present invention may also be a notebook, a tablet computer, a computer, a wearable device, etc., and the present invention does not impose any specific limitation on this.

[0076] The display panel and the display device provided by the embodiments of the present application have a display area including an optical component area and a normal display area, and the optical component area and the normal display area both include light emitting devices, so that the area of the display area is larger, and the trend of full screen display is met. In addition, in the optical component area provided by the embodiments of the present application, the width-length ratio of the first driving transistor corresponding to the first blue pixel is greater than the width-length ratio of the first driving transistor corresponding to the first red pixel, and / or the width-length ratio of the first driving transistor corresponding to the first blue pixel is greater than the width-length ratio of the first driving transistor corresponding to the first green pixel, so that the light emitting efficiency of the first blue pixel is improved, the chroma uniformity of the display panel in the optical component area is improved, and the display effect of the display panel is improved.

[0077] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, characterized in that: include: a plurality of pixels, the plurality of pixels including a first pixel, the first pixel including a first light emitting device and a first pixel circuit connected to each other, and the first pixel circuit including a first driving transistor; The first pixels include a first blue pixel, a first red pixel, and a first green pixel; The channel of the first driving transistor corresponding to the first blue pixel is rectangular; The channel of at least one of the first driving transistor corresponding to the first red pixel and the first driving transistor corresponding to the first green pixel is a zigzag channel; The first pixel circuit includes a reset module and a control light-emitting module electrically connected to the first driving transistor, the reset module includes at least one reset transistor electrically connected to the first driving transistor, and the control light-emitting module includes at least one control light-emitting transistor electrically connected to the first driving transistor; the width-to-length ratio of the corresponding control light-emitting transistor of the first pixel circuit is greater than the width-to-length ratio of the reset transistor in the same first pixel circuit.

2. The display panel according to claim 1, wherein: The width-to-length ratio of the first driving transistor corresponding to the first blue pixel is R1, the width-to-length ratio of the first driving transistor corresponding to the first red pixel is R2, and the width-to-length ratio of the first driving transistor corresponding to the first green pixel is R3, wherein R1>R2>0 and / or R1>R3>0.

3. The display panel according to claim 1, wherein: The first pixel circuit further includes a black state holding module and a control light emitting module electrically connected to the first light emitting device, the control light emitting module including at least one control light emitting transistor electrically connected to the first driving transistor, and the black state holding module including at least one black state holding transistor electrically connected to the first light emitting device; The first pixel circuit correspondingly controls the width-to-length ratio of the light-emitting transistor to be greater than the width-to-length ratio of the black-state holding transistor in the same first pixel circuit.

4. The display panel according to claim 2, wherein: The plurality of pixels further include a second pixel, the second pixel including a second light emitting device and a second pixel circuit connected to each other, and the second pixel circuit including a second driving transistor; A display area, the display area including an optical component area and a conventional display area, the first light-emitting device is located in the optical component area, and the second light-emitting device is located in the conventional display area; The second pixel includes a second blue pixel, a second red pixel and a second green pixel, the width-to-length ratio of the second driving transistor corresponding to the second blue pixel is R1', the width-to-length ratio of the second driving transistor corresponding to the second red pixel is R2', and the width-to-length ratio of the second driving transistor corresponding to the second green pixel is R3', wherein R1'>R2'>0 and / or R1'>R3'>0.

5. The display panel according to claim 4, wherein: R1>R1', R2>R2'; and R3>R3'.

6. The display panel according to claim 1, wherein: The plurality of pixels further includes a second pixel including a second light emitting device and a second pixel circuit connected to each other; Any one of the first pixel circuit and the second pixel circuit comprises an anode voltage terminal and a cathode voltage terminal, wherein the anode voltage terminal of the first pixel circuit and the anode voltage terminal of the second pixel circuit are electrically connected to the same voltage terminal; The cathode voltage terminal of the first pixel circuit and the cathode voltage terminal of the second pixel circuit are both electrically connected to the same voltage terminal.

7. The display panel according to claim 1, wherein: Also includes: A display area, the display area including an optical component area and a conventional display area, the first light-emitting device being located in the optical component area; The first pixel circuit connected to the first light-emitting device is located in the regular display area.

8. The display panel according to claim 1, wherein: Also includes: A display area, the display area including an optical component area and a conventional display area, the first light-emitting device being located in the optical component area; The first pixel circuit connected to the first light emitting device is located between the conventional display area and the optical component area.

9. The display panel according to claim 1, wherein: The bent channel is in the shape of a Chinese numeral “X”.

10. A display device, characterized in that: The display device comprises the display panel according to any one of claims 1 to 9.

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