Display panel and driving method thereof, and display device

Abstract

A display panel and a driving method thereof, and a display device, wherein the display panel comprises: a plurality of pixel islands, each of the plurality of pixel islands comprises a plurality of sub-pixels; a plurality of control signal lines; a plurality of switch signal lines; a plurality of light-emitting signal lines; and a sub-pixel driving circuit provided for each of the plurality of sub-pixels. The plurality of light-emitting signal lines are configured to: under the control of the switch signals provided by the plurality of switch signal lines and the control signals provided by the plurality of control signal lines, write the working grayscale level signals corresponding to the corresponding grayscales to the corresponding sub-pixels in order from small to large in a plurality of times during one frame of display time, wherein different working grayscale level signals indicate that the light-emitting signal line provides the working grayscale level signal to the organic light-emitting diode through the second transistor for different durations, and the final display grayscale of each of the plurality of sub-pixels in the plurality of pixel islands is the grayscale obtained by superposition of different working grayscale level signals.

Description

Technical Field

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

[0002] Compared with CTR (Cathode Ray Tube) displays or TFT-LCD (Thin Film Transistor-Liquid Crystal Display), OLED (Organic Light-Emitting Diode) displays have the characteristics of lighter and thinner appearance design, wider visual angle, faster response speed and lower power consumption. Therefore, OLED displays have gradually attracted people's attention as the next generation display devices.

[0003] Silicon-based OLED display panels use mature semiconductor CMOS (Complementary Metal-Oxide-Semiconductor Transistor) technology to integrate high-density and complex driving circuits on a single-crystal silicon active driving backplane chip, and then pair it with OLED to provide a single-chip micro-display solution. Summary of the invention

[0004] According to one aspect of the present disclosure, a silicon-based organic light-emitting diode display panel is provided, and the silicon-based organic light-emitting diode display panel includes: a plurality of pixel islands, each of the plurality of pixel islands includes a plurality of sub-pixels; a plurality of control signal lines; a plurality of switch signal lines; a plurality of light-emitting signal lines; and a sub-pixel driving circuit provided for each of the plurality of sub-pixels, the plurality of pixel islands are arranged in a plurality of rows and columns, and a plurality of sub-pixels in each of the plurality of pixel islands have the same color, a sub-pixel in each of the plurality of pixel islands and two sub-pixels of different colors in at least two adjacent pixel islands along a row or column direction constitute a pixel unit for display, and the sub-pixel driving circuit includes a first transistor, a second transistor and a first capacitor, a first electrode of the first transistor is connected to one of the plurality of switch signal lines, a second electrode of the first transistor is connected to a control electrode of the second transistor and a first electrode of the first capacitor one end, the control electrode of the first transistor is connected to one of the multiple control signal lines; the first electrode of the second transistor is connected to one of the multiple light-emitting signal lines, and the second electrode of the second transistor is connected to the first electrode of the organic light-emitting diode to be driven; the second end of the first capacitor is connected to the common voltage end, wherein the multiple light-emitting signal lines are configured to, under the control of the switching signals provided by the multiple switching signal lines and the control signals provided by the multiple control signal lines, write working grayscale level signals corresponding to the corresponding grayscales to the corresponding sub-pixels in order from small to large in a frame display time for multiple times, different working grayscale level signals indicate that the light-emitting signal line provides the working grayscale level signal to the organic light-emitting diode through the second transistor for different durations, and the final display grayscale of each of the multiple sub-pixels in the multiple pixel islands is the grayscale obtained by superimposing different working grayscale level signals.

[0005] Optionally, a first sub-pixel in each of the multiple pixel islands and a second sub-pixel and a third sub-pixel of different colors in at least two adjacent pixel islands along the row or column direction are located at the same position in the corresponding pixel islands to form a pixel unit.

[0006] Optionally, a distance between mutually adjacent sub-pixels in the plurality of sub-pixels in each of the plurality of pixel islands is smaller than a distance between mutually adjacent pixel islands in the plurality of pixel islands.

[0007] Optionally, the sub-pixel in each of the multiple pixel islands also includes the organic light-emitting diode, and the organic light-emitting diode is provided with the first electrode, the light-emitting functional layer and the second electrode in sequence on the side of the sub-pixel driving circuit away from the silicon base, and the first electrodes of the organic light-emitting diode of the sub-pixel in each of the multiple pixel islands are spaced apart from each other and the distance between each other is between 0.8um-1.2um.

[0008] Optionally, the distance between adjacent pixel islands in the plurality of pixel islands is between 20um and 24um.

[0009] Optionally, a size of each of the plurality of sub-pixels in the plurality of pixel islands is less than or equal to 3um*3um.

[0010] Optionally, the plurality of pixel islands include at least three pixel islands of different colors including red sub-pixels, blue sub-pixels and green sub-pixels, the pixel islands of three different colors are arranged in sequence along the row direction, and the pixel islands of the same color are arranged in sequence along the column direction.

[0011] Optionally, the first electrodes of the second transistors in the multiple sub-pixels in each of the multiple pixel islands are respectively connected in parallel to the same light emitting signal line, and different pixel islands in the multiple pixel islands are respectively connected to different light emitting signal lines.

[0012] Optionally, the display panel further includes at least one luminous signal bus, which is respectively connected to the plurality of luminous signal lines through a plurality of first selection switches.

[0013] Optionally, the display panel further includes a plurality of first gate lines, and the plurality of first gate lines are respectively connected to the plurality of first gate switches to respectively control the closing and opening of the plurality of first gate switches.

[0014] Optionally, the display panel also includes a plurality of second selection switches, wherein the plurality of light-emitting signal lines are respectively connected to the at least one light-emitting signal bus through one of the plurality of second selection switches and one of the plurality of first selection switches, one of the plurality of first selection switches is located between the at least one light-emitting signal bus and one of the plurality of second selection switches, and the plurality of light-emitting signal lines connected to one of the plurality of first selection switches and a column of pixel islands among the plurality of pixel islands arranged in multiple rows and columns are respectively connected through corresponding second selection switches.

[0015] Optionally, the display panel further includes a plurality of second gate lines, and the plurality of second gate lines are respectively connected to the plurality of second gate switches in a one-to-one correspondence to respectively control the closing and opening of the plurality of second gate switches.

[0016] Optionally, the multiple control signal lines extend in the row direction, the multiple switch signal lines extend in the column direction, the multiple control signal lines intersect the multiple switch signal lines to form multiple intersection areas, the multiple sub-pixels in the multiple pixel islands are respectively located in the multiple intersection areas, and the multiple control signal lines are configured to respectively drive multiple sub-pixel rows, and the multiple switch signal lines are configured to respectively drive multiple sub-pixel columns.

[0017] According to one aspect of the present disclosure, a display device is provided. The display device includes the display panel described above and a driving circuit for driving the display panel.

[0018] According to one aspect of the present disclosure, a method for driving the above-mentioned display panel is provided, comprising: providing control signals to sub-pixel rows in a plurality of pixel islands in sequence through a plurality of control signal lines, and providing switch signals to sub-pixel columns in the plurality of pixel islands through a plurality of switch signal lines; and after writing corresponding switch signals to a plurality of sub-pixels in the plurality of pixel islands in the display panel, providing light-emitting signals to each sub-pixel through a plurality of light-emitting signal lines, wherein, under the control of the switch signals provided by the plurality of switch signal lines and the control signals provided by the plurality of control signal lines, within a frame of display time, working grayscale level signals corresponding to corresponding grayscales are written to corresponding sub-pixels in sequence from small to large in multiple times through the plurality of light-emitting signal lines, different working grayscale level signals indicate that the duration for which the light-emitting signal line provides the working grayscale level signal to the organic light-emitting diode through the second transistor is different, and the final display grayscale of each of the plurality of sub-pixels in the plurality of pixel islands is the grayscale obtained by superimposing different working grayscale level signals.

[0019] Optionally, the light emitting grayscale type of each of the plurality of sub-pixels in the plurality of pixel islands is expressed as:

[0020] K=2 p

[0021] Wherein, K represents the type of the light emitting grayscale of the sub-pixel, p represents the number of times the effective working grayscale level signal is input into the sub-pixel, and p is an integer greater than or equal to 0.

[0022] Optionally, writing working grayscale level signals corresponding to corresponding grayscales to corresponding sub-pixels in ascending order of grayscale for multiple times through the multiple luminous signal lines within one frame display time includes: inputting working grayscale level signals to each sub-pixel on the display panel based on grayscales with a power value of 2 in the luminous grayscale type corresponding to 2p for multiple times in ascending order of grayscale, and controlling whether to input working grayscale level signals to the corresponding sub-pixels through switching signals provided by the multiple switching signal lines.

[0023] Optionally, 2 p The corresponding luminous grayscale type has a grayscale value that is not a power of 2 and a grayscale value that is greater than 2. p The grayscale of the maximum value in the corresponding luminous grayscale type is lower than the required grayscale, 2 p It is obtained by superimposing the grayscale values ​​of the power of 2 in the corresponding luminous grayscale types.

[0024] Optionally, a p value is selected, and a working grayscale level signal corresponding to the luminous grayscale type of the selected p value is output continuously from small to large grayscale as a cycle, and a plurality of cycles of working grayscale level signals are cyclically input to the corresponding sub-pixel to obtain the desired grayscale.

[0025] Optionally, p=4. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments or related technical descriptions will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure and are not limitations of the present disclosure.

[0027] Figure 1 is a schematic diagram of a pixel island structure of a silicon-based OLED display panel according to an embodiment of the present disclosure;

[0028] Figure 2 is a schematic diagram of a sub-pixel driving circuit according to an embodiment of the present disclosure;

[0029] Figure 3 is a layout diagram of a display driving signal line according to an embodiment of the present disclosure;

[0030] Figure 4 is a driving flow chart of a silicon-based OLED display panel according to an embodiment of the present disclosure; and

[0031] Figure 5 is a driving timing diagram of a silicon-based OLED display panel according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure more clear, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure.

[0033] The most obvious difference between silicon-based OLED display panels and ordinary OLED display panels is that the bottom glass plate of silicon-based OLED display panels is removed and replaced with silicon chips. Silicon-based OLED display panels are mainly made of IC (Integrated Circuit) manufacturing technology and OLED technology. Different from traditional mobile phones, computers, and TV screens, their pixel diagonal is generally less than 2 inches and the pixel density is greater than 1500 PPI (pixels per inch).

[0034] Thus, according to one aspect of the present disclosure, a silicon-based organic light-emitting diode display panel is provided, which includes: a plurality of pixel islands, each of the plurality of pixel islands including a plurality of sub-pixels; a plurality of control signal lines; a plurality of switching signal lines; a plurality of light-emitting signal lines; and a sub-pixel driving circuit set for each of the plurality of sub-pixels.

[0035] Figure 1 FIG. 1 is a schematic diagram of a pixel island structure of a silicon-based OLED display panel according to an embodiment of the present disclosure. Figure 1 As shown, a plurality of pixel islands 10 (AA11, AA12, AA13, AA21, AA22, AA23, AA31, AA32, AA33) are located on a substrate 1 and arranged in multiple rows and columns. Each of the plurality of pixel islands 10 includes a plurality of sub-pixels (e.g., sub-pixel 111, sub-pixel 121, sub-pixel 131). The plurality of sub-pixels in each of the plurality of pixel islands 10 have the same color, for example, each sub-pixel in pixel island AA11, pixel island AA21, and pixel island AA31 is red, each sub-pixel in pixel island AA12, pixel island AA22, and pixel island AA32 is green, and each sub-pixel in pixel island AA13, pixel island AA23, and pixel island AA33 is blue.

[0036] One sub-pixel in each of the plurality of pixel islands 10 and sub-pixels of different colors in at least two adjacent pixel islands 10 along the row direction (first direction D1) or along the column direction (second direction D2) constitute a pixel unit. As shown in Figure 1, only two adjacent pixel islands 10 along the row direction (first direction D1) have different colors, for example, the red sub-pixel 111 in the pixel island AA11, the green sub-pixel 121 in the pixel island AA12, and the blue sub-pixel 131 in the pixel island AA13 constitute a pixel unit. The pixel unit composed of the red sub-pixel 111, the green sub-pixel 121, and the blue sub-pixel 131 can be displayed under the drive of multiple control signal lines, multiple switch signal lines, and multiple light emitting signal lines.

[0037] Figure 2 FIG. 1 is a schematic diagram of a sub-pixel driving circuit according to an embodiment of the present disclosure, which shows a schematic diagram of a driving circuit for 9 sub-pixels in a pixel island AA11, for example. Figure 2As shown, one of the sub-pixel driving circuits includes: a first transistor M1, whose control electrode is connected to one of a plurality of control signal lines (G1, G2, G3, ...), a first electrode is connected to one of a plurality of switch signal lines (D_I1, D_I2, D_I2, ...), and a second electrode is connected to the control electrode of the second transistor M2 and the first end of the first capacitor C; a second transistor M2, whose first electrode is connected to one (D_T11) of a plurality of light emitting signal lines (D_T11, D_T12, D_T13, D_T21, D_T22, D_T23, D_T31, D_T32, D_T33, ...), and a second electrode is connected to the first electrode (anode) of the organic light emitting diode E to be driven; a storage capacitor C, whose second end is connected to the common voltage terminal. The second electrode (cathode) of the organic light emitting diode E is connected to the first voltage terminal VSS.

[0038] In the present disclosure, a plurality of light-emitting signal lines are configured to write working grayscale level signals corresponding to corresponding grayscales to corresponding sub-pixels in a plurality of times in a grayscale ascending order in a frame display time under the control of switch signals provided by a plurality of switch signal lines and control signals provided by a plurality of control signal lines, and different working grayscale level signals indicate that the duration of the light-emitting signal line providing the working grayscale level signal to the organic light-emitting diode through the second transistor is different, and the final display grayscale of each of the plurality of sub-pixels in the plurality of pixel islands is the grayscale obtained by superposition of different working grayscale level signals. That is, in a frame display time, working grayscale level signals corresponding to corresponding grayscales are written to corresponding sub-pixels in a grayscale ascending order, such as grayscale 1, grayscale 2, grayscale 4 (grayscale obtained by an integer power of 2) ..., etc. The duration of the sub-pixel working grayscale level signals corresponding to different grayscale values ​​is different, for example, the duration of the sub-pixel working grayscale level signal corresponding to grayscale 1 is unit 1, and the duration of the sub-pixel working grayscale level signal corresponding to grayscale 2 is unit 2. The final displayed grayscale of each sub-pixel is the grayscale obtained by superimposing different working grayscale level signals. For example, the working grayscale level signals corresponding to grayscale 1 and grayscale 2 are input into a sub-pixel twice in sequence to obtain the final grayscale 3 after the superposition of grayscale 1 and grayscale 2; for example, the working grayscale level signals corresponding to grayscale 1 and grayscale 4 are input into a sub-pixel twice in sequence to obtain the final grayscale 5 after the superposition of grayscale 1 and grayscale 4. In this process, when the light-emitting signal line outputs the working grayscale level signal corresponding to grayscale 2, the working grayscale level signal corresponding to grayscale 2 can be selectively not input into the sub-pixel.

[0039] That is to say, the light emitting signal line sequentially outputs the working grayscale level signals corresponding to grayscale 1, grayscale 2 and grayscale 4. Through the control of the switch signals provided by the multiple switch signal lines and the control signals provided by the multiple control signal lines, the working grayscale level signal corresponding to grayscale 1 can be input to the sub-pixel, the working grayscale level signal corresponding to grayscale 2 can not be input to the sub-pixel, and the working grayscale level signal corresponding to grayscale 4 can continue to be input to the sub-pixel, thereby obtaining the final grayscale 5. In the process of inputting the working grayscale level signals corresponding to each grayscale into each sub-pixel, the switch signals provided by the multiple switch signal lines are required to be able to input the working grayscale level signals of different durations corresponding to different grayscales into the corresponding sub-pixels, that is, the switch signals are required to be large or small enough to ensure that the conduction duration of the second transistor M2 meets the duration of the working grayscale level signal corresponding to the maximum grayscale. The working principle of the sub-pixel circuit will be described below.

[0040] In the present disclosure, multiple sub-pixels of the same color are arranged in the same pixel island, which can reduce the difficulty of the process. This arrangement can also reduce the spacing between multiple sub-pixels in the same pixel island as much as possible, and form a pixel unit with sub-pixels in adjacent pixel islands of different colors for display. Compared with the arrangement of a pixel unit composed of three independent sub-pixels in the related art, when the same number of pixel units are arranged, the present disclosure can significantly reduce the area occupied by the same number of pixel units, thereby improving the PPI of the display panel.

[0041] Alternatively, if Figure 1 As shown, the multiple sub-pixels in each of the multiple pixel islands 10 are arranged in multiple rows and columns, and the number, size and position of the multiple sub-pixels in each of the multiple pixel islands are arranged the same. For example, each of the multiple pixel islands AA11 to AA33 is in the form of a 3x3 matrix, including 9 sub-pixels, and the size of each sub-pixel and the positional relationship between the multiple sub-pixels in each pixel island are the same. This is conducive to reducing the process difficulty of the display panel.

[0042] Optionally, a first sub-pixel in each of the plurality of pixel islands 10 and a second sub-pixel and a third sub-pixel of different colors in at least two adjacent pixel islands along the row direction or the column direction are located at the same position in the corresponding pixel island to form a pixel unit. Figure 1As shown, the first sub-pixel 111 in the pixel island AA11, the second sub-pixel 121 located at the same position in the pixel island AA12, and the third sub-pixel 131 located at the same position in the pixel island AA13 can constitute a pixel unit. The sub-pixels at other positions in the pixel island AA11, and the sub-pixels located at the same position in the pixel island AA12 and the pixel island AA13 can constitute another pixel unit. In this way, the pixel island AA11, the pixel island AA12, and the pixel island AA13 can form 9 pixel units. Compared with the 9 pixel units formed by three independent sub-pixels in the related art, the present disclosure can reduce the occupied area by arranging the 9 sub-pixels of the same color in a manner smaller than the spacing between the usual three sub-pixels, thereby improving the PPI of the display panel. In addition, since the sub-pixels in each of the 9 pixel units formed by the pixel island AA11, the pixel island AA12, and the pixel island AA13 have the same arrangement and spacing, the arrangement of the present disclosure is also conducive to the display of the picture.

[0043] Optionally, based on the fact that a plurality of sub-pixels of the same color are compactly arranged together to form a pixel island, the distance between adjacent sub-pixels in the plurality of sub-pixels in each of the plurality of pixel islands 10 is smaller than the distance between adjacent pixel islands in the plurality of pixel islands. Figure 1 As shown. And optionally, the distance between adjacent sub-pixels in the multiple sub-pixels in each of the multiple pixel islands can be as close to zero as possible based on the manufacturing process, so that the multiple sub-pixels in a pixel island are as compact as possible. In the present disclosure, the sub-pixels in each of the multiple pixel islands include an organic light-emitting diode E, and the organic light-emitting diode E is sequentially provided with a first electrode, a light-emitting functional layer, and a second electrode on the side of the sub-pixel driving circuit away from the silicon base. The first electrodes of the organic light-emitting diodes of the sub-pixels in each of the multiple pixel islands are spaced apart from each other and the distance between them is between 0.8um-1.2um, and optionally, the distance can be 0.9um, 1.0um, or 1.1um. The second electrodes of the organic light-emitting diodes of the multiple sub-pixels in the multiple pixel islands can be formed as a whole to cover the entire surface of the display panel. And, based on the manufacturing process, the distance between the first electrodes of the organic light-emitting diodes can be as small as possible.

[0044] Optionally, the distance between adjacent pixel islands in the plurality of pixel islands 10 is between 20um and 24um, for example, 21um, 22um, 23um, etc. Optionally, the size of each of the plurality of sub-pixels in the plurality of pixel islands may be set to, for example, be less than or equal to 3um*3um, for example, 2.4um*2.4um, which may specifically be the minimum sub-pixel size that can be manufactured by the adopted process.

[0045] Alternatively, if Figure 1As shown, the plurality of pixel islands 10 may include at least three pixel islands of different colors, namely, red sub-pixels, blue sub-pixels, and green sub-pixels. The three pixel islands of different colors are arranged in sequence along a first direction D1, and the pixel islands of the same color are arranged in sequence along a second direction D2, and the first direction D1 is perpendicular to the second direction D2, thereby forming a plurality of pixel islands arranged in multiple rows and columns. In this way, when a pixel unit is formed by combining, sub-pixels of corresponding colors can be selected from the adjacent pixel islands of three colors. The three pixel islands of different colors along the first direction D1 form a group, and sub-pixels are selected from them to form a pixel unit. Figure 1 It is shown that a pixel unit is composed of sub-pixels of three different colors, but the present disclosure is not limited to this. For example, a pixel unit can be composed of a red sub-pixel, a blue sub-pixel, a green sub-pixel and a white sub-pixel, and pixel islands of corresponding colors are set accordingly.

[0046] Optionally, the first electrodes of the second transistors M2 in the plurality of sub-pixels in each of the plurality of pixel islands 10 are respectively connected in parallel to the same light emitting signal line. Figure 2 As shown, the first electrodes of the second transistors M2 of the nine sub-pixels in the pixel island AA11 are all connected to the same light emitting signal line D_T11.

[0047] Optionally, different pixel islands among the plurality of pixel islands are respectively connected to different light emitting signal lines. Figure 3 FIG. 1 is a layout diagram of a light emitting signal line according to an embodiment of the present disclosure. Figure 3 As shown, pixel island AA11 is connected to the luminous signal line D_T11, pixel island AA12 is connected to the luminous signal line D_T12, pixel island AA13 is connected to the luminous signal line D_T13, pixel island AA21 is connected to the luminous signal line D_T21, pixel island AA22 is connected to the luminous signal line D_T22, pixel island AA23 is connected to the luminous signal line D_T23, pixel island AA31 is connected to the luminous signal line D_T31, pixel island AA32 is connected to the luminous signal line D_T32, and pixel island AA33 is connected to the luminous signal line D_T33. In other words, multiple sub-pixels in each pixel island can be connected to the same luminous signal line, while multiple sub-pixels in different pixel islands are connected to different luminous signal lines. In this way, whether to provide a display drive signal to a certain pixel island can be realized by controlling the corresponding luminous signal line, and then by controlling whether the luminous signal is written normally, smart browsing (SmartView) display can be realized, thereby reducing power consumption. Different luminous signals can be controlled by corresponding switches to realize whether they are written normally from the outside.

[0048] Optionally, the display panel further includes at least one luminous signal bus D_T, which is connected to a plurality of luminous signal lines (D_T11, D_T12, D_T13, D_T21, D_T22, D_T23, D_T31, D_T32 and D_T33 ...) through a plurality of first selection switches (e.g., S1, S2, S3 ...), respectively, such as Figure 3 In this way, at least one luminous signal bus D_T can be controlled by a plurality of first selection switches to provide display driving signals to a plurality of luminous signal lines respectively.

[0049] Optionally, the display panel further includes a plurality of first gate lines (eg, a1, a2, a3), the plurality of first gate lines being respectively connected to the plurality of first gate switches to respectively control the closing and opening of the plurality of first gate switches, such as Figure 3 shown.

[0050] Optionally, the display panel further includes a plurality of second gate lines (eg, a4, a5, a6) and a plurality of second gate switches (eg, S11, S12, S13, etc.), such as Figure 3 As shown. The plurality of second selection lines are connected to the plurality of second selection switches one by one to control the closing and opening of the plurality of second selection switches respectively. The plurality of light-emitting signal lines are connected to at least one light-emitting signal bus D_T through one of the plurality of second selection switches and one of the plurality of first selection switches respectively. Optionally, as Figure 3 As shown, one of the plurality of first selection switches is located between at least one light-emitting signal bus and one of the plurality of second selection switches and the number of the plurality of first selection switches is less than the number of the plurality of second selection switches. For example, the number of the plurality of second selection switches may be equal to the number of pixel islands in the display panel, and the number of the plurality of first selection switches may be equal to the number of pixel island columns in the display panel, that is, one first selection switch may control whether at least one light-emitting signal bus is connected to each light-emitting signal line corresponding to a column of pixel islands.

[0051] Multiple first selection switches and multiple second selection switches can be transistors, and multiple first selection lines are respectively connected to the control electrodes (gates) of corresponding transistors serving as first selection switches, and multiple second selection lines are respectively connected to the control electrodes of corresponding transistors serving as second selection switches, thereby controlling the conduction and disconnection of the corresponding transistors.

[0052] Alternatively, if Figure 1As shown, multiple control signal lines extend along a first direction D1, multiple switch signal lines extend along a second direction D2, multiple control signal lines intersect with multiple switch signal lines to form multiple intersection areas, multiple sub-pixels in multiple pixel islands are respectively located in the multiple intersection areas, and multiple control signal lines are configured to respectively drive multiple sub-pixel rows, and multiple switch signal lines are configured to respectively drive multiple sub-pixel columns.

[0053] In the present disclosure, through the above pixel island and pixel unit setting method, a high resolution of the display panel can be achieved. In addition, since the sub-pixel size of the silicon-based OLED display panel of the present disclosure is smaller than the sub-pixel size of the traditional display panel, the power consumption can be significantly reduced and the brightness of the display panel can be improved.

[0054] According to another aspect of the present disclosure, a display device is also provided, which may include any of the display panels described above and a driving circuit for driving the display panel. Since the display device uses the display panel described above, high resolution, high brightness and low power consumption driving of the display device can be achieved.

[0055] According to another aspect of the present disclosure, a method for driving the above display panel is also provided. Figure 4 is a driving flow chart of a silicon-based OLED display panel according to an embodiment of the present disclosure, Figure 5 is a driving timing diagram of a silicon-based OLED display panel according to an embodiment of the present disclosure. Figure 1 , Figure 4 and Figure 5 The driving method of the present invention will be described in detail.

[0056] like Figure 4 As shown, the driving method includes the following steps S110 and S120.

[0057] First, in step S110, control signals are provided to sub-pixel rows in a plurality of pixel islands in sequence through a plurality of control signal lines, and switch signals are provided to sub-pixel columns in a plurality of pixel islands through a plurality of switch signal lines. Specifically, control signals are provided to sub-pixel rows in a plurality of pixel islands in sequence through a plurality of control signal lines (G1, G2, G3...). For example, a control signal is provided to the first row of sub-pixels in the first row of pixel islands through the control signal line G1, so that each first transistor M1 in the sub-pixel driving circuit in the row is turned on. At the same time, switch signals are provided to sub-pixel columns in a plurality of pixel islands through a plurality of switch signal lines (D_I1, D_I2, D_I3...). Then, a control signal is provided to the second row of sub-pixels in the first row of pixel islands through the control signal line G2, so that each first transistor M1 in the sub-pixel driving circuit in the row is turned on. At the same time, switch signals are provided to sub-pixel columns in a plurality of pixel islands through a plurality of switch signal lines (D_I1, D_I2, D_I3...). This process is repeated until the switching signal required by each sub-pixel is stored in the storage capacitor C of the corresponding sub-pixel. Figure 5 As shown, in the present disclosure, the switch signal is taken as a high level as an effective signal for explanation. For example, when the control signal is provided to the first row of sub-pixels in the first row of pixel islands through the control signal line G1, the first transistor M1 is turned on, and at the same time, D_I outputs a high level. The high level signal can be stored in the storage capacitor C through the first transistor M1, thereby turning on the second transistor M2. Only when the second transistor M2 is turned on, the corresponding grayscale working grayscale level signal can be input to the corresponding sub-pixel of the first row of sub-pixels through the light emitting signal line D_T11; when the control signal is provided to the second row of sub-pixels in the first row of pixel islands through the control signal line G2, the first transistor M1 is turned on, and at the same time, D_I outputs a low level. The low level signal can be stored in the storage capacitor C through the first transistor M1, thereby turning off the second transistor M2. When the second transistor M2 is turned off, it means that the corresponding grayscale working grayscale level signal output through the light emitting signal line D_T11 cannot reach the corresponding sub-pixel of the second row of sub-pixels. In this way, whether to input the working grayscale level signal of the corresponding grayscale output by the light emitting signal line D_T11 to the corresponding sub-pixel can be controlled by the switch signals provided by the plurality of switch signal lines.

[0058] Next, in step S120, a plurality of light-emitting signal lines are used to provide light-emitting signals to each sub-pixel. Specifically, according to the grayscale value to be displayed of each sub-pixel in the image to be displayed, the low grayscale combination required for each sub-pixel to display the grayscale to be displayed is determined based on the following formula (1) and the p value, and then sequentially input to each sub-pixel of the display panel through the light-emitting signal lines according to the grayscale type from small to large. Based on the low grayscale combination required for each sub-pixel to display the grayscale to be displayed, under the control of the switch signals provided by the plurality of switch signal lines and the control signals provided by the plurality of control signal lines, the working grayscale level signal of the corresponding duration of the corresponding low grayscale is selectively allowed to reach the sub-pixel through the second transistor M2 (by controlling the conduction and disconnection of the second transistor M2), until each sub-pixel obtains each grayscale in the low grayscale combination required for displaying the grayscale to be displayed.

[0059] Optionally, the light emitting grayscale type of each of the plurality of sub-pixels in the plurality of pixel islands is expressed as:

[0060] K=2 p (1)

[0061] Wherein, K represents the type of the luminous grayscale of the sub-pixel, p represents the number of times the effective working grayscale level signal is input to the sub-pixel, and p is an integer and is greater than or equal to 0. For example, if p=4, then K=16, indicating that 16 luminous grayscales 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15 can be output. Grayscale 0 means that no working grayscale level signal is output to the sub-pixel, grayscale 1 means that a working grayscale level signal of 1 unit time length is output to the sub-pixel, grayscale 2 means that a working grayscale level signal of 2 unit time length is output to the sub-pixel, grayscale 4 means that a working grayscale level signal of 4 unit time length is output to the sub-pixel, and grayscale 8 means that a working grayscale level signal of 8 unit time length is output to the sub-pixel. The relationship between the durations of grayscale 1, grayscale 2, grayscale 4 and grayscale 8 can be expressed as 1:2:4:8, as shown in FIG. Figure 5 Other grayscale values ​​can be obtained by superimposing grayscale 1, grayscale 2, grayscale 4 and grayscale 8. For example, grayscale 15 can be obtained by superimposing grayscale 1, grayscale 2, grayscale 4 and grayscale 8.

[0062] Optionally, writing the working grayscale level signal corresponding to the corresponding grayscale to the corresponding sub-pixel in ascending grayscale order for multiple times in one frame display time through multiple light-emitting signal lines includes: writing the working grayscale level signal corresponding to the corresponding grayscale to the corresponding sub-pixel in ascending grayscale order for multiple times in one frame display time based on 2 pThe corresponding luminous grayscale type, the working grayscale level signal corresponding to each grayscale is continuously input to each sub-pixel on the display panel, and the switch signal provided by the multiple switch signal lines is used to control whether the working grayscale level signal is input to the corresponding sub-pixel. As described above, grayscale 5 can be obtained by sequentially inputting the working grayscale level signals corresponding to grayscale 1 and grayscale 4 to a sub-pixel twice. Specifically, in the process of sequentially inputting grayscale 1, grayscale 2 and grayscale 4 through the luminous signal line, when the working grayscale level signal corresponding to grayscale 2 is input, the second transistor M2 is turned off through the switch signal control so that the working grayscale level signal corresponding to grayscale 2 does not enter the sub-pixel, and only the working grayscale level signals corresponding to grayscale 1 and grayscale 4 enter the sub-pixel.

[0063] Optionally, a p value is selected, and a working grayscale level signal corresponding to the selected p value is continuously outputted from small to large grayscales as a cycle, and a plurality of cycles of working grayscale level signals are cyclically inputted to the corresponding sub-pixel to obtain the desired grayscale. For example, if p=4, then K=16, indicating that 16 luminous grayscales 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15 can be outputted. When a grayscale higher than grayscale 15 needs to be inputted, grayscales 0 to 15 can be continuously inputted (as a low grayscale, which is one cycle), and then grayscales 0 to 15 can be sequentially inputted starting from grayscale 0, and superimposed until the desired grayscale is obtained.

[0064] From the above working process of the display panel, it can be known that the number of times the luminous signal is written to the sub-pixels in the display panel (or the number of times the grayscale data is refreshed) can be equal to the number of different grayscale types in the image to be displayed. In this way, it is not necessary to input the luminous signal of the corresponding grayscale corresponding to the duration for each sub-pixel in sequence.

[0065] By adopting the above method to drive the silicon-based OLED display panel disclosed in the present invention, power consumption can be significantly reduced and the brightness of the display panel can be improved.

[0066] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A silicon-based organic light-emitting diode display panel, comprising: a plurality of pixel islands, each of the plurality of pixel islands comprising a plurality of sub-pixels; a plurality of control signal lines; Multiple switch signal lines; Multiple light signal lines; and a sub-pixel driving circuit provided for each of the plurality of sub-pixels, The plurality of pixel islands are arranged in a plurality of rows and columns and the plurality of sub-pixels in each of the plurality of pixel islands have the same color, and one sub-pixel in each of the plurality of pixel islands and two sub-pixels of different colors in at least two adjacent pixel islands along a row or column direction constitute a pixel unit for display, The sub-pixel driving circuit includes a first transistor, a second transistor and a first capacitor, wherein a first electrode of the first transistor is connected to one of the plurality of switch signal lines, a second electrode of the first transistor is connected to a control electrode of the second transistor and a first end of the first capacitor, and the control electrode of the first transistor is connected to one of the plurality of control signal lines; a first electrode of the second transistor is connected to one of the plurality of light emitting signal lines, a second electrode of the second transistor is connected to a first electrode of an organic light emitting diode to be driven; and a second end of the first capacitor is connected to a common voltage end. Among them, the multiple light-emitting signal lines are configured to, under the control of the switching signals provided by the multiple switching signal lines and the control signals provided by the multiple control signal lines, write working grayscale level signals corresponding to the corresponding grayscales to the corresponding sub-pixels in order from small to large in a multiple times within a frame display time, different working grayscale level signals indicate that the time lengths for which the light-emitting signal line provides the working grayscale level signal to the organic light-emitting diode through the second transistor are different, and the final display grayscale of each of the multiple sub-pixels in the multiple pixel islands is the grayscale obtained by superimposing different working grayscale level signals.

2. The display panel according to claim 1, wherein: A first sub-pixel in each of the plurality of pixel islands and second and third sub-pixels of different colors in at least two adjacent pixel islands along the row or column direction are located at the same position in the corresponding pixel islands to form a pixel unit.

3. The display panel according to claim 2, wherein: A distance between mutually adjacent sub-pixels among the plurality of sub-pixels in each of the plurality of pixel islands is smaller than a distance between mutually adjacent pixel islands among the plurality of pixel islands.

4. The display panel according to claim 3, wherein: The sub-pixel in each of the multiple pixel islands also includes the organic light-emitting diode, which is provided with the first electrode, the light-emitting functional layer and the second electrode in sequence on the side of the sub-pixel driving circuit away from the silicon base, and the first electrodes of the organic light-emitting diodes of the sub-pixels in each of the multiple pixel islands are spaced apart from each other and the distance between each other is between 0.8um-1.2um.

5. The display panel according to claim 4, wherein: The distance between adjacent pixel islands in the plurality of pixel islands is between 20um and 24um.

6. The display panel according to claim 5, wherein: A size of each of the plurality of sub-pixels in the plurality of pixel islands is less than or equal to 3um*3um.

7. The display panel according to any one of claims 1 to 6, wherein: The plurality of pixel islands include at least three pixel islands of different colors, namely, red sub-pixels, blue sub-pixels and green sub-pixels. The pixel islands of the three different colors are sequentially arranged along a row direction, and the pixel islands of the same color are sequentially arranged along a column direction.

8. The display panel according to claim 7, wherein: The first electrodes of the second transistors in the plurality of sub-pixels in each of the plurality of pixel islands are respectively connected in parallel to the same light emitting signal line, and different pixel islands in the plurality of pixel islands are respectively connected to different light emitting signal lines. 9 . The display panel according to claim 8 , further comprising at least one light emitting signal bus line, which is respectively connected to the plurality of light emitting signal lines through a plurality of first selection switches. 10 . The display panel according to claim 9 , further comprising a plurality of first gate lines, wherein the plurality of first gate lines are respectively connected to the plurality of first gate switches to respectively control the closing and opening of the plurality of first gate switches.

11. The display panel according to claim 10, further comprising a plurality of second gate switches, wherein: The plurality of light-emitting signal lines are respectively connected to the at least one light-emitting signal bus through one of the plurality of second selection switches and one of the plurality of first selection switches, one of the plurality of first selection switches is located between the at least one light-emitting signal bus and one of the plurality of second selection switches, and the plurality of light-emitting signal lines connected to one of the plurality of first selection switches and a column of pixel islands among the plurality of pixel islands arranged in multiple rows and columns are respectively connected through corresponding second selection switches. 12 . The display panel according to claim 11 , further comprising a plurality of second gate lines, wherein the plurality of second gate lines are respectively connected to the plurality of second gate switches in a one-to-one correspondence to respectively control the closing and opening of the plurality of second gate switches.

13. The display panel according to claim 1, wherein: The multiple control signal lines extend in the row direction, the multiple switch signal lines extend in the column direction, the multiple control signal lines intersect with the multiple switch signal lines to form a multiple intersection area, the multiple sub-pixels in the multiple pixel islands are respectively located in the multiple intersection areas, and the multiple control signal lines are configured to drive a plurality of sub-pixel rows, respectively, and the multiple switch signal lines are configured to drive a plurality of sub-pixel columns, respectively.

14. A display device, comprising the display panel according to any one of claims 1 to 13 and a driving circuit for driving the display panel.

15. A method for driving the display panel according to claim 1, comprising: Providing control signals to sub-pixel rows in a plurality of pixel islands in sequence through a plurality of control signal lines, and providing switch signals to sub-pixel columns in the plurality of pixel islands through a plurality of switch signal lines; as well as After the corresponding switching signals are written into the plurality of sub-pixels of the plurality of pixel islands in the display panel and the switch signal line stops providing signals, a plurality of light-emitting signal lines are used to provide light-emitting signals to the sub-pixels respectively. Among them, under the control of the switching signals provided by the multiple switching signal lines and the control signals provided by the multiple control signal lines, within one frame display time, the multiple light-emitting signal lines are used to write working grayscale level signals corresponding to the corresponding grayscales to the corresponding sub-pixels in order from small to large in multiple times, and different working grayscale level signals indicate that the light-emitting signal lines provide the working grayscale level signals to the organic light-emitting diode through the second transistor for different durations, and the final display grayscale of each of the multiple sub-pixels in the multiple pixel islands is the grayscale obtained by superimposing different working grayscale level signals.

16. The method according to claim 15, wherein: The light-emitting grayscale type of each of the plurality of sub-pixels in the plurality of pixel islands is expressed as: K＝2 p Wherein, K represents the type of the light emitting grayscale of the sub-pixel, p represents the number of times the effective working grayscale level signal is input into the sub-pixel, and p is an integer greater than or equal to 0.

17. The method according to claim 16, wherein: Writing working grayscale level signals corresponding to corresponding grayscales into corresponding sub-pixels in ascending order of grayscale for multiple times within one frame display time through the multiple light-emitting signal lines includes: inputting working grayscale level signals into each sub-pixel on the display panel based on grayscales with a power value of 2 in the light-emitting grayscale types corresponding to 2p for multiple times in ascending order of grayscale, and controlling whether to input working grayscale level signals into corresponding sub-pixels through switching signals provided by the multiple switching signal lines.

18. The method according to claim 17, wherein: 2 p The corresponding luminous grayscale type has a grayscale value that is not a power of 2 and a grayscale value that is greater than 2. p The grayscale of the maximum value in the corresponding luminous grayscale type is lower than the required grayscale, 2 p It is obtained by superimposing the grayscale values ​​of the power of 2 in the corresponding luminous grayscale types.

19. The method according to claim 18, wherein: A p value is selected, and a working grayscale level signal corresponding to the luminous grayscale type of the selected p value is output continuously from small to large grayscale as a cycle, and a plurality of cycles of working grayscale level signals are cyclically input to the corresponding sub-pixel to obtain the desired grayscale.

20. The method according to claim 19, wherein: p＝4。

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