Display panel, driving method thereof, and display device
By using a data signal driver to analyze image data and a switching circuit to adjust the data line voltage in medium-to-large-sized foldable mobile phone display panels, the high power consumption problem of pure red or pure blue images was solved, resulting in reduced power consumption and improved display stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BOE TECHNOLOGY GROUP CO LTD
- Filing Date
- 2023-06-30
- Publication Date
- 2026-04-24
AI Technical Summary
In medium to large-sized foldable phone display panels, the data signal driver consumes a lot of power when displaying pure red or pure blue images, which causes the power management chip to limit current and protect itself, resulting in problems such as black screen.
The image data is analyzed by a data signal driver. Data lines with large voltage differences and opposite trends in adjacent scan lines are detected. A switching circuit is used to connect these data lines before the previous line finishes charging, so that their voltage transitions to an intermediate level and reduces the voltage fluctuation of the data lines.
It effectively reduces the power consumption of the data signal driver, avoids black screen problems during the display process, and improves display quality.
Smart Images
Figure CN116798333B_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to, but is not limited to, the field of display technology, and in particular to a display panel and its driving method, and a display device. Background Technology
[0002] In medium to large-sized foldable phone projects, due to the large effective display area (AA) and high requirements for pixel resolution (Pixels Per Inch, PPI), pixel arrangement typically uses sub-pixel arrangements such as RGBG or GGRB. The display panel refreshes row by row, and the brightness of each pixel is controlled by the voltage of each column of data lines. Figure 1 As shown, the pixels controlled by the data lines can be assumed as follows: data line D1 controls the RB pixels in the first column, data line D2 controls the G pixels in the second column, and data line D3 controls the RB pixels in the third column, but the arrangement order of the RB pixels in the third column is the opposite of that in the first column.
[0003] With similar pixel arrangement, the power consumption of the data signal driver varies significantly when displaying pure white W255, pure green G255, pure red R255, or pure blue B255 images. In particular, the power consumption of the data signal driver is higher when displaying pure red R255 or pure blue B255 images. This is because the data voltage waveform of the data line changes more significantly when displaying pure red R255 or pure blue B255 images. Figures 2 to 5 These are schematic diagrams showing the voltage waveforms of some data lines when displaying a pure white W255, pure green G255, pure red R255, or pure blue B255 display screen, respectively. Figures 2 to 5 It can be seen that when displaying pure red R255 and pure blue B255 display images, the data line voltage corresponding to the RB pixel column repeatedly rises and falls, which increases the power consumption of the data signal driver. Summary of the Invention
[0004] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims.
[0005] This disclosure provides a driving method for a display panel. The display panel includes a plurality of sub-pixels arranged in a matrix, a plurality of gate lines and a plurality of data lines connected to the plurality of sub-pixels, each row of the matrix being disposed between two adjacent gate lines, and each column of the matrix being disposed between two adjacent data lines. The display panel further includes at least one switching circuit, each of the switching circuits being connected between two data lines and configured to connect or disconnect the connection between the two data lines. The driving method includes:
[0006] Obtain the display grayscale of each sub-pixel in the first scan line and the second scan line, wherein the second scan line is adjacent to the first scan line and the scanning order of the second scan line is after the scanning order of the first scan line;
[0007] The system detects whether the two data lines connected to the switching circuit meet a first condition and a second condition. The first condition is that the difference in display grayscale between the second scan row sub-pixel and the first scan row sub-pixel corresponding to one of the data lines is greater than a preset first grayscale threshold, and the first grayscale threshold is greater than 0. The second condition is that the difference in display grayscale between the first scan row sub-pixel and the second scan row sub-pixel corresponding to the other data line is greater than a preset second grayscale threshold, and the second grayscale threshold is greater than 0.
[0008] When the two data lines connected by the switching circuit meet the first condition and the second condition, the switching circuit is controlled to connect the two data lines that meet the conditions after scanning the first scan line and before scanning the second scan line.
[0009] This disclosure also provides a display panel, including: a plurality of sub-pixels arranged in a matrix, and a plurality of gate lines and a plurality of data lines connected to the plurality of sub-pixels, wherein each row of the matrix is disposed between two adjacent gate lines among the plurality of gate lines, and each column of the matrix is disposed between two adjacent data lines among the plurality of data lines.
[0010] The display panel further includes at least one switching circuit and a data signal driver connected to the switching circuit. Each switching circuit is connected between two data lines and is configured to connect the two data lines or disconnect the connection between the two data lines.
[0011] The data signal driver is configured to acquire the display grayscale of each sub-pixel in a first scan line and a second scan line, wherein the second scan line is adjacent to the first scan line and the scanning order of the second scan line is after the scanning order of the first scan line; detect whether the two data lines connected by the switching circuit satisfy a first condition and a second condition, wherein the first condition is: the difference in display grayscale between the sub-pixel of the second scan line and the sub-pixel of the first scan line corresponding to one of the data lines is greater than a preset first grayscale threshold, and the first grayscale threshold is greater than 0; the second condition is: the difference in display grayscale between the sub-pixel of the first scan line and the sub-pixel of the second scan line corresponding to the other data line is greater than a preset second grayscale threshold, and the second grayscale threshold is greater than 0; when the two data lines connected by the switching circuit satisfy the first condition and the second condition, after scanning the first scan line and before scanning the second scan line, control the switching circuit to connect the two data lines that satisfy the conditions.
[0012] This disclosure also provides a display device, including a display panel as described in any embodiment of this disclosure.
[0013] After reading and understanding the accompanying diagrams and detailed descriptions, other aspects can be understood. Attached Figure Description
[0014] The accompanying drawings are provided to further illustrate the technical solutions of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the technical solutions of this disclosure and do not constitute a limitation on the technical solutions of this disclosure. The shapes and sizes of the components in the drawings do not reflect actual proportions and are only intended to illustrate the content of this disclosure.
[0015] Figure 1 This is a schematic diagram of a sub-pixel arrangement method for a display panel;
[0016] Figure 2 A schematic diagram of some data line voltage waveforms when displaying a pure white W255 display screen;
[0017] Figure 3 A schematic diagram of the voltage waveforms of some data lines when displaying a pure green G255 display screen;
[0018] Figure 4 A schematic diagram of some data line voltage waveforms when displaying a pure blue B255 display screen;
[0019] Figure 5 A schematic diagram of partial data line voltage waveforms when displaying a pure red R255 display screen;
[0020] Figure 6 This is a schematic diagram of the structure of a display panel according to an embodiment of the present disclosure;
[0021] Figure 7 This is a schematic diagram of the structure of a display device according to an embodiment of the present disclosure;
[0022] Figure 8A and Figure 8B These are schematic diagrams of partial data line voltage output waveforms, respectively, showing the driving method without using the driving method of this disclosure and the driving method after using the driving method of this disclosure.
[0023] Figure 9 A flowchart illustrating a driving method provided for an exemplary embodiment of this disclosure;
[0024] Figure 10 A schematic diagram of a switching circuit provided for an exemplary embodiment of this disclosure;
[0025] Figure 11 A flowchart illustrating another driving method provided for an exemplary embodiment of this disclosure. Detailed Implementation
[0026] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in this disclosure can be arbitrarily combined with each other.
[0027] Unless otherwise defined, the technical or scientific terms used in the embodiments of this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in the embodiments of this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" indicate that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, but do not exclude other elements or objects.
[0028] Unless otherwise defined, the technical or scientific terms used in the embodiments of this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in the embodiments of this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" indicate that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, but do not exclude other elements or objects.
[0029] In scenarios displaying pure red (R255) or pure blue (B255) images, the data line voltage corresponding to the RB pixel column repeatedly rises and falls, resulting in high power consumption of the data signal driver. For medium to large-sized products, excessive current can cause the power management chip (PMIC) to enter current limiting protection and shut down, leading to problems such as black screens during display.
[0030] Depend on Figure 1 It can be seen that data lines D1 and D3 are on the same row, controlling the R and B pixels respectively. This can be observed... Figures 2 to 5 From the variation pattern of the display grayscale corresponding to two adjacent rows of sub-pixels, it can be seen that in display scenarios such as displaying pure red R255 or pure blue B255, when scanning and charging two adjacent rows of sub-pixels, the voltage change pattern of data line D1 is exactly the opposite of the change pattern of data line D3. For example, when the voltage of data line D1 increases, the voltage of data line D3 decreases; when the voltage of data line D1 decreases, the voltage of data line D3 increases.
[0031] This disclosure provides a display panel and its driving method. After receiving an image signal, the data signal driver analyzes the overall image data and identifies data lines Dn and Dm that have a large voltage difference in the same row and whose voltage change trends are exactly opposite in the next row. The switching circuit connecting data lines Dn and Dm is turned on after the previous row finishes charging and before the current row starts charging, so that the voltage of data lines Dn and Dm transitions to an intermediate level, reducing the power consumption on the data lines. n is a natural number between 1 and M, m is a natural number between 1 and M, n≠m, and M is the total number of columns of sub-pixels (or the total number of data lines).
[0032] like Figure 6 As shown, this embodiment of the present disclosure provides a display panel, including: a plurality of sub-pixels arranged in a matrix, and a plurality of gate lines and a plurality of data lines connected to the plurality of sub-pixels. Each row of the matrix is disposed between two adjacent gate lines among the plurality of gate lines, and each column of the matrix is disposed between two adjacent data lines among the plurality of data lines.
[0033] The display panel also includes at least one switching circuit and a data signal driver connected to the switching circuit. Each switching circuit is connected between two data lines and is configured to connect the two data lines or disconnect the connection between the two data lines.
[0034] A data signal driver is configured to acquire the display grayscale of each sub-pixel in a first scan line and a second scan line, wherein the second scan line is adjacent to the first scan line and the scanning order of the second scan line is after the scanning order of the first scan line; detect whether the two data lines connected by the switching circuit meet a first condition and a second condition, wherein the first condition is: the difference in display grayscale between the sub-pixel of the second scan line and the sub-pixel of the first scan line corresponding to one data line is greater than a preset first grayscale threshold, and the first grayscale threshold is greater than 0; the second condition is: the difference in display grayscale between the sub-pixel of the first scan line and the sub-pixel of the second scan line corresponding to the other data line is greater than a preset second grayscale threshold, and the second grayscale threshold is greater than 0; when the two data lines connected by the switching circuit meet the first condition and the second condition, after scanning the first scan line and before scanning the second scan line, control the switching circuit to connect the two data lines that meet the first condition and the second condition.
[0035] The display panel provided in this embodiment controls a switching circuit to connect two data lines that satisfy the first and second conditions after the data signal driver scans the first scan line and before scanning the second scan line. This allows the voltage of the two data lines to be at an intermediate potential before scanning the second scan line. Therefore, when scanning the second scan line, the voltage range of the two data lines will be reduced, thereby reducing the power consumption of the data signal driver, avoiding problems such as black screen during display, and improving display quality.
[0036] During the driving process of the display panel, it is necessary to scan or charge the sub-pixels in the display panel line by line before displaying the image. In this embodiment of the disclosure, scanning or charging the sub-pixels refers to providing a gate control voltage to the gate lines connected to the sub-pixels and providing a data voltage to the data lines connected to the sub-pixels, so that the sub-pixels display the corresponding grayscale according to the provided data voltage during the display scanning period.
[0037] like Figure 6 As shown, the display panel may include multiple pixel units P arranged in a matrix. At least one of the multiple pixel units P includes a first sub-pixel P1 emitting a first color light, a second sub-pixel P2 emitting a second color light, and a third sub-pixel P3 emitting a third color light. Each of the first sub-pixel P1, second sub-pixel P2, and third sub-pixel P3 includes a pixel driving circuit and a light-emitting device. The pixel driving circuits in the first sub-pixel P1, second sub-pixel P2, and third sub-pixel P3 are respectively connected to a gate line and a data line. The pixel driving circuits are configured to receive the data voltage transmitted by the data line under the control of the gate line and output a corresponding current to the light-emitting device. The light-emitting devices in the first sub-pixel P1, second sub-pixel P2, and third sub-pixel P3 are respectively connected to the pixel driving circuit of their respective sub-pixels. The light-emitting devices are configured to emit light of corresponding brightness in response to the current output by the pixel driving circuit of their respective sub-pixels.
[0038] In some exemplary embodiments, a pixel unit P may include red (R) sub-pixels, green (G) sub-pixels, and blue (B) sub-pixels, or it may include red, green, blue, and white sub-pixels; this disclosure does not limit the scope of the invention. In exemplary embodiments, the shape of the sub-pixels in a pixel unit may be rectangular, rhomboid, pentagonal, or hexagonal. When a pixel unit includes three sub-pixels, the three sub-pixels may be arranged horizontally side-by-side, vertically side-by-side, or in a triangular arrangement. When a pixel unit includes four sub-pixels, the four sub-pixels may be arranged horizontally side-by-side, vertically side-by-side, or in a square arrangement; this disclosure does not limit the scope of the invention.
[0039] Figure 7 This is a schematic diagram of the structure of a display device. Figure 7As shown, the display device may include a timing controller, a data signal driver, a scan signal driver, and a pixel array. The pixel array may include multiple gate lines (S1 to SN), multiple data lines (D1 to DM), and multiple sub-pixels Pxij. In an exemplary embodiment, the timing controller may provide grayscale values and control signals of specifications suitable for the data signal driver to the data signal driver, and may provide clock signals, scan start signals, etc., of specifications suitable for the scan signal driver to the scan signal driver. The data signal driver may use the grayscale values and control signals received from the timing controller to generate data voltages to be provided to the data lines D1, D2, D3, ..., and DM. For example, the data signal driver may use a clock signal to sample the grayscale values and apply data voltages corresponding to the grayscale values to the data lines D1 to DM on a sub-pixel row basis, where M can be a natural number. The scan signal driver may generate scan signals to be provided to the gate lines S1, S2, S3, ..., and SN by receiving clock signals, scan start signals, etc., from the timing controller. For example, a scan signal driver can sequentially provide scan signals with on-level pulses to gate lines S1 through SN. For example, the scan signal driver can be configured as a shift register and can generate scan signals by sequentially transmitting scan start signals, provided in the form of on-level pulses, to the next stage circuit under the control of a clock signal, where N can be a natural number. The sub-pixel array can include multiple sub-pixels PXij. Each sub-pixel PXij can be connected to a corresponding data line and a corresponding gate line, where i and j can be natural numbers. A sub-pixel PXij can refer to a sub-pixel whose transistor is connected to the i-th gate line and connected to the j-th data line.
[0040] In this embodiment of the present disclosure, when the data signal driver detects that the grayscale of the next scan row sub-pixel corresponding to the nth data line (i.e., data line Dn) increases significantly compared to the grayscale of the current scan row sub-pixel and the grayscale of the next scan row sub-pixel corresponding to the mth data line (i.e., data line Dm) decreases significantly compared to the grayscale of the current scan row sub-pixel, after charging the current scan row sub-pixel and before charging the next scan row sub-pixel, the nth data line and the mth data line are connected by a switching circuit so that the voltages of the nth data line and the mth data line are both at an intermediate potential. This reduces the size of the voltage range of the nth data line and the mth data line when charging the next scan row sub-pixel, thereby reducing the power consumption of the data signal driver.
[0041] Figure 8A and Figure 8B These are schematic diagrams showing partial data line voltage output waveforms, respectively, without using the driving method of this disclosure and after using the driving method of this disclosure. For example, as shown... Figure 8AAs shown, when the displayed image is R255 or B255, there is a significant voltage difference between data lines D1 and D3 in the same row, and the voltage change trend is exactly opposite in the next row. Using the driving method of this embodiment, the data signal driver will open the switching circuit between data lines D1 and D3 before the charging of the previous row's sub-pixels ends and the charging of the current row's sub-pixels begins. Assuming data line D1 is currently at a high level V1 and will change to a low level V2 in the next row, while data line D3 is currently at a low level V3 and will change to a high level V4 in the next row, the opening of the switching circuit will keep data lines D1 and D3 at the intermediate level (V1+V3) / 2. Subsequently, the switching circuit will close, and data lines D1 and D3 will output low level V2 and high level V4 respectively during the next row's scan output. For an R255 image, V1 = V4 = VGMP, V2 = V3 = Vdata - R255, where VGMP is the data voltage when the sub-pixel is completely off, and Vdata - R255 is the data voltage when the sub-pixel displays the R255 red image. Figure 8B It is understood that connecting data line D1 and data line D3 before switching the data line voltage output can transition the data line voltage to an intermediate level before switching to the target level. This embodiment introduces a level switching step in the level conversion stage, which can reduce the power consumption on the data line.
[0042] In some exemplary embodiments, when the display panel scans line by line from top to bottom, the first scan line can be the i-th line, the second scan line can be the i+1-th line, where i is a natural number between 1 and N-1, and N is the total number of sub-pixel lines.
[0043] In some exemplary embodiments, when the display panel scans line by line from bottom to top, the first scan line can be the (i+1)th line, the second scan line can be the ith line, where i is a natural number between 1 and N-1, and N is the total number of sub-pixel lines.
[0044] In some exemplary embodiments, the switching circuit includes X switches, where the Xth switch circuit is connected to the (4X-3)th data line and the (4X-1)th data line, and X ≥ 1. That is, the first switch circuit is connected to data lines D1 and D3, the second switch circuit is connected to data lines D5 and D7, and so on.
[0045] In some exemplary embodiments, the plurality of sub-pixels include a first sub-pixel emitting a first color light, a second sub-pixel emitting a second color light, and a third sub-pixel emitting a third color light. The first and third sub-pixels are arranged alternately in odd-numbered columns, and the arrangement order of the first and third sub-pixels in two adjacent odd-numbered columns is reversed. The second sub-pixel is arranged row by row in even-numbered columns.
[0046] The data signal driver is also configured to: when the display panel displays a first color pure image or a third color pure image, after scanning each row of sub-pixels and before scanning the next row of sub-pixels, set two odd-numbered columns of sub-pixels as a group, and the arrangement direction of the sub-pixels in the two odd-numbered columns of each group is opposite, and control the switch circuit to connect the data lines corresponding to the two odd-numbered columns of sub-pixels in each group.
[0047] In some exemplary embodiments, grouping two odd-numbered columns of subpixels together includes grouping the (4X-3)th column of subpixels with the (4X-1)th column of subpixels, where X ≥ 1. That is, controlling the Xth switch circuit to connect the (4X-3)th data line and the (4X-1)th data line.
[0048] For example, when displaying a pure blue or pure red screen, before the pixel charging stage, the data line D1 and data line D3 (or data line D5 and data line D7...) are connected by a switching circuit to level the data lines D1 and D3 (or data line D5 and data line D7...) to the same intermediate potential, and then the data signal driver controls the voltage of the data lines to rise or fall.
[0049] In some other exemplary embodiments, the switching circuit includes M*(M-1) / 2, where M is the total number of columns of sub-pixels. That is, a switching circuit is provided between any two data lines, a data line is connected to multiple switching circuits, and a data line is connected to different data lines through different switching circuits.
[0050] In some exemplary embodiments, the data signal driver is further configured such that when x data lines satisfy a first condition and y data lines satisfy a second condition, x is greater than 1 and y is greater than 1. The driving method further includes:
[0051] The x data lines that meet the first condition are sorted according to the difference in display grayscale between the sub-pixels of the second scan row and the sub-pixels of the first scan row corresponding to the data lines, to obtain the first sequence;
[0052] The y data lines that meet the second condition are sorted according to the difference in display grayscale between the sub-pixels of the first scan row and the sub-pixels of the second scan row corresponding to the data lines, to obtain the second sequence;
[0053] According to the sorting order, one data line from the first sequence and another data line from the second sequence are taken to form a group. After scanning the sub-pixels of the first scan row and before scanning the sub-pixels of the second scan row, the two data lines in each group are connected by a switching circuit.
[0054] The display panel of this embodiment utilizes multiple switching circuits to connect all data lines in pairs, such as... Figure 9 As shown, after receiving the image data, the data signal driver compares the data in the first and second rows to obtain the grayscale change of each column of data lines relative to the first row. The trend is divided into increasing and decreasing, and the data is sorted according to the magnitude of the change. The column with the largest increase in grayscale is defined as S. I1 The column with the largest decrease in gray level is defined as S. D1 The remaining columns are defined according to the same rules. After sorting, the S values of each row are... I1 With S D1 The switching circuits in the first column are turned on, and the switching circuits in the remaining columns are turned on according to the same rule. After that, the second row of data is output, and subsequent rows of data are also processed according to the same rule.
[0055] In this embodiment of the disclosure, the data signal driver determines which switch circuits need to be turned on before scanning each scan line (the first scan line does not need to have its switch circuits turned on). The data signal driver can determine the switch circuits to be turned on for each scan line before all scan lines start scanning after receiving a frame of image data; or it can determine the switch circuits to be turned on for the current scan line after the previous scan line is scanned and before the current scan line is scanned. This embodiment of the disclosure does not limit this.
[0056] In some exemplary embodiments, before acquiring the display grayscale of each sub-pixel in the first and second scan rows, the data signal driver is further configured to: receive a frame of image data, determine the display grayscale of each sub-pixel in each scan row based on the received image data, and trigger (N-1) operations to detect whether the two data lines connected to the detection switch circuit meet the first and second conditions for N rows of sub-pixels, where N is the total number of sub-pixel rows.
[0057] In some exemplary embodiments, the first grayscale threshold is between 80 and 120, and the second grayscale threshold is between 80 and 120. However, the embodiments disclosed herein do not limit this, and the first grayscale threshold and the second grayscale threshold can be set as needed.
[0058] In some exemplary embodiments, the switching circuit can be a transistor, with the first and second terminals of the transistor connected to two data lines respectively, and the control terminal of the transistor connected to a data signal driver. In this embodiment of the present disclosure, the first and second terminals of the transistor are connected to two data lines respectively, and the transistor is controlled by the data signal driver.
[0059] For example, the transistor can be a metal-oxide-semiconductor field-effect transistor (MOS-FET).
[0060] In some exemplary embodiments, the transistor may be an N-type transistor. However, this disclosure is not limiting in this regard, and in other exemplary embodiments, the transistor may also be a P-type transistor.
[0061] This disclosure provides a driving method for a display panel. The display panel includes a plurality of sub-pixels arranged in a matrix, a plurality of gate lines and a plurality of data lines connected to the plurality of sub-pixels, wherein each row of the matrix is disposed between two adjacent gate lines, and each column of the matrix is disposed between two adjacent data lines. The display panel further includes at least one switching circuit, each switching circuit being connected between two data lines and configured to connect or disconnect the connection between the two data lines. The driving method includes:
[0062] Step 1101: Obtain the display grayscale of each sub-pixel in the first scan line and the second scan line, wherein the second scan line is adjacent to the first scan line and the scanning order of the second scan line is after the scanning order of the first scan line;
[0063] Step 1102: Detect whether the two data lines connected to the switch circuit meet the first condition and the second condition. The first condition is: the difference between the display grayscale of the second scan row sub-pixel and the first scan row sub-pixel corresponding to one data line is greater than the preset first grayscale threshold, and the first grayscale threshold is greater than 0. The second condition is: the difference between the display grayscale of the first scan row sub-pixel and the second scan row sub-pixel corresponding to the other data line is greater than the preset second grayscale threshold, and the second grayscale threshold is greater than 0.
[0064] Step 1103: When the two data lines connected by the switching circuit meet the first condition and the second condition, after scanning the first scan line and before scanning the second scan line, control the switching circuit to connect the two data lines that meet the first condition and the second condition.
[0065] The display panel driving method provided in this embodiment controls the switching circuit to connect two data lines that satisfy the first and second conditions after scanning the first scan line and before scanning the second scan line. This allows the voltage of the two data lines to be at an intermediate potential before scanning the second scan line. Therefore, when scanning the second scan line, the voltage range of the two data lines rising or falling will be reduced, thereby reducing the power consumption of the data signal driver.
[0066] For example, when it is detected that the grayscale of the next scan row sub-pixel corresponding to the nth data line increases significantly compared to the display grayscale of the current scan row sub-pixel, and the grayscale of the next scan row sub-pixel corresponding to the mth data line decreases significantly compared to the display grayscale of the current scan row sub-pixel, the nth data line and the mth data line are connected after the current scan row sub-pixel is charged and before the next scan row sub-pixel is charged, so that the voltages of the nth data line and the mth data line are both at an intermediate potential. This reduces the size of the voltage range of the nth data line and the mth data line when charging the next scan row sub-pixel, thereby reducing the power consumption of the data signal driver. n is a natural number between 1 and M, m is a natural number between 1 and M, n≠m, and M is the total number of sub-pixel columns.
[0067] In some exemplary embodiments, when the display panel scans line by line from top to bottom, the first scan line can be the i-th line, the second scan line can be the i+1-th line, i is a natural number between 1 and N-1, and N is the total number of sub-pixel lines.
[0068] In some exemplary embodiments, when the display panel scans line by line from bottom to top, the first scan line can be the (i+1)th line, the second scan line can be the ith line, where i is a natural number between 1 and N-1, and N is the total number of sub-pixel lines.
[0069] In some exemplary embodiments, when x data lines satisfy the first condition and y data lines satisfy the second condition, x is greater than 1 and y is greater than 1, the driving method further includes:
[0070] The x data lines that meet the first condition are sorted according to the difference in display grayscale between the sub-pixels of the second scan row and the sub-pixels of the first scan row corresponding to the data lines, to obtain the first sequence;
[0071] The y data lines that meet the second condition are sorted according to the difference in display grayscale between the sub-pixels of the first scan row and the sub-pixels of the second scan row corresponding to the data lines, to obtain the second sequence;
[0072] According to the sorting order, one data line from the first sequence and another data line from the second sequence are taken to form a group. After scanning the sub-pixels of the first scan row and before scanning the sub-pixels of the second scan row, the two data lines in each group are connected by a switching circuit.
[0073] In some exemplary embodiments, the driving method further includes, before acquiring the display grayscale of each subpixel in the first and second scan rows:
[0074] Receive a frame of image data and determine the display grayscale of each sub-pixel in each scan line based on the received image data;
[0075] For N rows of sub-pixels, trigger (N-1) operations to check whether the two data lines connected to the detection switch circuit meet the first and second conditions, where N is the total number of sub-pixel rows.
[0076] In some exemplary embodiments, the first grayscale threshold is between 80 and 120, and the second grayscale threshold is between 80 and 120.
[0077] In some exemplary embodiments, the plurality of sub-pixels include a first sub-pixel emitting a first color light, a second sub-pixel emitting a second color light, and a third sub-pixel emitting a third color light. The first sub-pixel and the third sub-pixel are arranged alternately in odd-numbered columns, and the arrangement order of the first sub-pixel and the third sub-pixel in two adjacent odd-numbered columns is reversed. The second sub-pixel is arranged row by row in even-numbered columns.
[0078] This driving method also includes:
[0079] When the display panel displays a first-color pure image or a third-color pure image, after scanning each row of sub-pixels and before scanning the next row of sub-pixels, two odd-numbered columns of sub-pixels are grouped together, and the arrangement direction of the sub-pixels in the two odd-numbered columns of each group is opposite. The control switch circuit is connected to the data lines corresponding to the two odd-numbered columns of sub-pixels in each group.
[0080] In some exemplary implementations, two odd-numbered columns of subpixels are grouped together, specifically: the subpixel in column (4X-3) and the subpixel in column (4X-1) are grouped together, where X≥1.
[0081] In this embodiment of the disclosure, the display panel can be used in any product or component with display function, such as mobile phones, tablets, televisions, monitors, laptops, digital photo frames, and navigators. This embodiment of the disclosure is not limited thereto.
[0082] While the embodiments disclosed herein are as described above, the content is merely for the purpose of facilitating understanding of this disclosure and is not intended to limit the invention. Any person skilled in the art may make any modifications and changes to the form and details of the implementation without departing from the spirit and scope of this disclosure; however, the patent protection scope of this invention shall still be determined by the scope defined in the appended claims.
Claims
1. A driving method for a display panel, characterized in that, The display panel includes a plurality of sub-pixels arranged in a matrix, and a plurality of gate lines and a plurality of data lines connected to the plurality of sub-pixels. Each row of the matrix is disposed between two adjacent gate lines, and each column of the matrix is disposed between two adjacent data lines. The display panel also includes at least one switching circuit connected between two data lines and configured to connect or disconnect the connection between the two data lines. The plurality of sub-pixels includes a first sub-pixel emitting a first color light, a second sub-pixel emitting a second color light, and a third sub-pixel emitting a third color light. The first and third sub-pixels are arranged alternately in odd-numbered columns, and the arrangement order of the first and third sub-pixels in two adjacent odd-numbered columns is reversed. The second sub-pixels are arranged row by row in even-numbered columns. The driving method includes: Obtain the display grayscale of each sub-pixel in the first scan line and the second scan line, wherein the second scan line is adjacent to the first scan line and the scanning order of the second scan line is after the scanning order of the first scan line; The system detects whether the two data lines connected to the switching circuit meet a first condition and a second condition. The first condition is that the difference in display grayscale between the second scan row sub-pixel and the first scan row sub-pixel corresponding to one of the data lines is greater than a preset first grayscale threshold, and the first grayscale threshold is greater than 0. The second condition is that the difference in display grayscale between the first scan row sub-pixel and the second scan row sub-pixel corresponding to the other data line is greater than a preset second grayscale threshold, and the second grayscale threshold is greater than 0. When the two data lines connected by the switching circuit meet the first condition and the second condition, after scanning the first scan line and before scanning the second scan line, the switching circuit is controlled to connect the two data lines that meet the first condition and the second condition. The driving method further includes: when the display panel displays a first color pure image or a third color pure image, after scanning each row of sub-pixels and before scanning the next row of sub-pixels, setting two odd-numbered columns of sub-pixels as a group, and the arrangement direction of the sub-pixels in the two odd-numbered columns of each group is opposite, and controlling the switching circuit to connect the data lines corresponding to the two odd-numbered columns of sub-pixels in each group.
2. The driving method according to claim 1, characterized in that, The first scan line is the i-th row, and the second scan line is the (i+1)-th row; or, the first scan line is the (i+1)-th row, and the second scan line is the i-th row, where i is a natural number between 1 and N-1, and N is the total number of rows of the sub-pixel.
3. The driving method according to claim 1, characterized in that, When there are x data lines satisfying the first condition and y data lines satisfying the second condition, x is greater than 1 and y is greater than 1, the driving method further includes: The x data lines that satisfy the first condition are sorted according to the difference in display grayscale between the sub-pixels of the second scan row and the sub-pixels of the first scan row corresponding to the data lines to obtain the first sequence; The y data lines that satisfy the second condition are sorted according to the difference in display grayscale between the first scan row sub-pixels and the second scan row sub-pixels corresponding to the data lines to obtain the second sequence; According to the sorting order, one data line from the first sequence and another data line from the second sequence are taken to form a group. After scanning the sub-pixels of the first scan row and before scanning the sub-pixels of the second scan row, the two data lines in each group are connected through the switching circuit.
4. The driving method according to claim 1, characterized in that, Before acquiring the display grayscale of each sub-pixel in the first and second scan rows, the driving method further includes: Receive a frame of image data and determine the display grayscale of each sub-pixel in each scan line based on the received image data; For N rows of sub-pixels, the operation of detecting whether the two data lines connected to the switching circuit meet the first and second conditions is triggered (N-1) times, where N is the total number of sub-pixel rows.
5. The driving method according to claim 1, characterized in that, The first grayscale threshold is between 80 and 120, and the second grayscale threshold is between 80 and 120.
6. The driving method according to claim 1, characterized in that, The step of grouping two odd-numbered columns of sub-pixels together includes: grouping the (4X-3)th column of sub-pixels with the (4X-1)th column of sub-pixels together, where X≥1.
7. A display panel, characterized in that, It includes: multiple sub-pixels arranged in a matrix, and multiple gate lines and multiple data lines connected to the multiple sub-pixels. Each row of the matrix is set between two adjacent gate lines among the multiple gate lines, and each column of the matrix is set between two adjacent data lines among the multiple data lines. The multiple sub-pixels include a first sub-pixel emitting a first color light, a second sub-pixel emitting a second color light, and a third sub-pixel emitting a third color light. The first sub-pixel and the third sub-pixel are arranged alternately in odd-numbered columns, and the arrangement order of the first sub-pixel and the third sub-pixel in two adjacent odd-numbered columns is reversed. The second sub-pixel is arranged row by row in even-numbered columns. The display panel further includes at least one switching circuit and a data signal driver connected to the switching circuit. Each switching circuit is connected between two data lines and is configured to connect the two data lines or disconnect the connection between the two data lines. The data signal driver is configured to acquire the display grayscale of each sub-pixel in a first scan line and a second scan line, wherein the second scan line is adjacent to the first scan line and the scanning order of the second scan line is after the scanning order of the first scan line; The system detects whether the two data lines connected to the switching circuit meet a first condition and a second condition. The first condition is that the difference in display grayscale between the second scan row sub-pixel and the first scan row sub-pixel corresponding to one of the data lines is greater than a preset first grayscale threshold, where the first grayscale threshold is greater than 0. The second condition is that the difference in display grayscale between the first scan row sub-pixel and the second scan row sub-pixel corresponding to the other data line is greater than a preset second grayscale threshold, where the second grayscale threshold is greater than 0. When the two data lines connected to the switching circuit meet the first and second conditions, after scanning the first scan row and before scanning the second scan row, the system controls the switching circuit to connect the two data lines that meet the first and second conditions. The data signal driver is further configured to, when the display panel displays a first color pure image or a third color pure image, after scanning each row of sub-pixels and before scanning the next row of sub-pixels, group two odd-numbered columns of sub-pixels together, with the arrangement directions of the sub-pixels in the two odd-numbered columns of each group being opposite, and control the switching circuit to connect the data lines corresponding to the two odd-numbered columns of sub-pixels in each group.
8. The display panel according to claim 7, characterized in that, The switching circuit is a transistor, with the first and second terminals of the transistor connected to two data lines respectively, and the control terminal of the transistor connected to the data signal driver.
9. The display panel according to claim 8, characterized in that, The transistor is an N-type transistor.
10. The display panel according to claim 7, characterized in that, The switching circuit comprises M*(M-1) / 2 units, where M is the total number of columns of the sub-pixels.
11. A display device, characterized in that, include: The display panel as described in any one of claims 7 to 10.
Citation Information
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Drive method, liquid crystal display panel and electronic device
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