Display panel and display device
By setting up dummy data lines in the LCD panel and connecting them to selected data lines via a printed circuit board, the problem of uneven electric field at the edge pixels is solved, reducing costs and improving display effect and system flexibility.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SDP GLOBAL (CHINA) CO LTD
- Filing Date
- 2025-06-24
- Publication Date
- 2026-07-07
AI Technical Summary
In existing LCD panels, uneven data line design causes edge pixels to be affected by different electric fields than other pixels in the panel, requiring the addition of virtual data lines and thin-film chip channels, which increases costs.
By setting up dummy data lines in the non-display area and electrically connecting them to selected data lines in the display area via a printed circuit board, the thin-film chip does not require additional channels to drive the dummy data lines and can share data signals.
A uniform electric field distribution was achieved, reducing the cost and system complexity of thin-film chips, and improving display performance and flexibility.
Smart Images
Figure CN224471928U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of display technology, and more specifically, to a display panel and a display device. Background Technology
[0002] In the fields of semiconductor integrated circuit manufacturing technology, microelectronic packaging technology, and electronic signal processing technology, thin-film chip (CoF) is a common packaging form for driver chips. CoF chips are typically used to drive the data lines of liquid crystal display (LCD) panels, with each data line corresponding to one pixel. In practical applications, to ensure optimal display performance of the LCD panel, it is necessary to ensure uniform electric field stress on each data line to avoid problems such as color difference or uneven brightness.
[0003] In existing LCD panels, because the data lines are designed on one side of the pixel, the non-edge pixels are affected by the electric field of the data line signal on both sides, while the outermost pixels are only affected by the electric field of the data line signal on one side of the panel. This results in the outermost pixels experiencing a different electric field effect than other pixels in the panel. To ensure that all pixels in the panel receive the same electric field effect, a dummy data line is usually designed next to the edge pixels and led to the thin-film chip so that it can receive a set data signal, thereby achieving the purpose of balancing the electric field.
[0004] However, this method requires the total number of channels (CH) on all thin-film chips to be greater than the total number of data lines on the liquid crystal display panel. For example, refer to Figure 1 As shown, in the display panel 100', there are a total of 11,520 data lines 20' in the display area AA'. If these are divided equally into 12 parts (i.e., electrically connected to 12 thin-film chips 40'), then each thin-film chip 40' requires 960 channels (960CH*12) to connect one-to-one with the 960 data lines 20'. Figure 1 In the process, the 960 data lines 20' electrically connected to the same thin-film chip 40' are sequentially named D(1), D(2), D(...), D(959), and D(960). However, because a dummy data line 30' is added at the outermost edge, the number of channels for each thin-film chip 40' needs to be increased to 961. Considering production practices, each thin-film chip 40' in the liquid crystal display panel should have 961 channels to meet the requirements. As described above, the functional requirements for the thin-film chip increase, and the corresponding material cost also increases. Utility Model Content
[0005] Therefore, it is necessary to provide a display panel and display device to reduce the cost of the driver chip for the display panel in the related art.
[0006] A first aspect of this application provides a display panel having a display area and a non-display area surrounding the display area. The display panel includes:
[0007] Multiple scan lines are arranged within the display area;
[0008] Multiple data lines are arranged within the display area and intersect with the multiple scan lines to form multiple pixels;
[0009] At least one dummy data line is provided in the non-display area;
[0010] At least one thin-film chip is electrically connected to the plurality of data lines to drive the plurality of data lines, the thin-film chip not including any additional channels dedicated to connecting the dummy data lines; and
[0011] At least one printed circuit board electrically connected to the at least one thin-film chip;
[0012] The dummy data line is electrically connected to one of the multiple data lines via the printed circuit board to receive the data signal from the selected data line.
[0013] In this display panel, the thin-film chip does not contain an additional channel (or dedicated channel) for connecting dummy data lines. The dummy data lines are not driven by the thin-film chip's dedicated channel, but are electrically connected to a selected data line within the display area via a printed circuit board, thus sharing the data signal of that selected data line. Therefore, while achieving the function of dummy data lines, there is no need to add a driving channel to the thin-film chip, reducing the cost of the display panel's driver chip.
[0014] In some embodiments, the plurality of pixels are arranged in a predetermined color period, and the selection of the selected data line is based on the predetermined color period and the color of the pixel in the display area immediately adjacent to the dummy data line.
[0015] In some embodiments, the predetermined color cycle is a red, green, and blue cycle; wherein the pixel adjacent to the dummy data line is blue and the pixel corresponding to the selected data line is red; or, the pixel adjacent to the dummy data line is red and the pixel corresponding to the selected data line is green; or, the pixel adjacent to the dummy data line is green and the pixel corresponding to the selected data line is blue.
[0016] In some embodiments, the selected data line is any one of the plurality of data lines.
[0017] In some embodiments, the display panel further includes at least one amplifier electrically connected between the selected data line and the dummy data line.
[0018] In some embodiments, the amplifier is disposed on the thin-film chip; or, the amplifier is disposed on the printed circuit board.
[0019] In some embodiments, the printed circuit board includes a test point electrically connected to the selected data line, and the dummy data line is further configured to be fused with a target scan line among the plurality of scan lines, such that after the electrical connection between the selected data line and the test point is broken, the test point can be used to measure the signal of the target scan line.
[0020] In some embodiments, where the display panel further includes the amplifier, the display panel also includes a signal lead connecting the selected data line and the input of the amplifier, the output of the amplifier being electrically connected to the test point.
[0021] In some embodiments, the test point is an exposed conductive contact; or, the surface of the test point is covered with an insulating protective layer.
[0022] A second aspect of this application provides a display device, the display device including the display panel described in the first aspect of this application.
[0023] The display device of the second aspect of this application has at least the same advantages as the aforementioned display panel, which will not be repeated here. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the structure of a display panel for related technologies.
[0025] Figure 2 This is a schematic diagram of the structure of a display panel according to an embodiment of this application.
[0026] Figure 3 This is a schematic diagram of the structure of a display panel according to an embodiment of this application.
[0027] Figure 4 This is a schematic diagram of the structure of a display panel according to an embodiment of this application.
[0028] Figure 5 This is a schematic diagram of the structure of a display panel according to an embodiment of this application.
[0029] Figure 6 This is a schematic diagram of the structure of a display panel in one embodiment of the present application when monitoring scan line signals.
[0030] Explanation of key component symbols:
[0031]
[0032] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation
[0033] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of this application, and should not be construed as limiting this application.
[0034] Figure 2 This is a schematic diagram of the structure of a display panel 100 according to an embodiment of this application. Figure 2 As shown, the display panel 100 has a display area AA and a non-display area NA located around the display area AA. The display panel 100 includes multiple scan lines 10, multiple data lines 20, at least one dummy data line 30, at least one thin film chip 40, and at least one printed circuit board 50.
[0035] Multiple scan lines 10 and multiple data lines 20 are all disposed within the display area AA. The multiple data lines 20 intersect with the multiple scan lines 10 to form multiple pixels P. Dummy data lines 30, a thin-film chip 40, and a printed circuit board 50 are all disposed within the non-display area NA. The thin-film chip 40 is electrically connected to the multiple data lines 20 to drive them. The printed circuit board 50 is electrically connected to the thin-film chip 40. The dummy data line 30 is electrically connected via the printed circuit board 50 to a selected data line 20a among the multiple data lines 20 to receive the data signal from the selected data line 20a. The thin-film chip 40 does not contain an additional channel dedicated to connecting the dummy data line 30.
[0036] In this display panel 100, the thin-film chip 40 does not contain an additional channel (or dedicated channel) specifically for connecting the dummy data line 30. The dummy data line 30 is not driven by the dedicated channel of the thin-film chip 40, but is electrically connected to a selected data line 20 within the display area AA via the printed circuit board 50, thereby sharing the data signal of that selected data line 20a. Therefore, while achieving the function of the dummy data line 30, it is not necessary to add a driving channel to the thin-film chip 40, reducing the cost and complexity of the driver chip.
[0037] In some embodiments, each scan line 10 extends along a first direction D1, and each data line 20 extends along a second direction D2. The first direction D1 is perpendicular to the second direction D2. Any two adjacent scan lines 10 and any two adjacent data lines 20 intersect to define a pixel P. Multiple pixels P are arranged in multiple columns along the first direction D1 and in multiple rows along the second direction D2.
[0038] Figure 2 The diagram illustrates a dummy data line 30, two thin-film chips 40, and two printed circuit boards 50. The dummy data line 30 is positioned adjacent to the display area AA and extends along the second direction D2 to connect with the printed circuit board 50. Each thin-film chip 40 connects to multiple data lines 20, with each chip 40 having the same number of connected data lines 20. The number of channels on each chip 40 is the same as the number of connected data lines 20; there are no channels specifically designed for the dummy data line 30. In other words, each chip 40 does not have a channel that connects only to the dummy data line 30 and not to any of the data lines 20. Each thin-film chip 40 is connected to a corresponding printed circuit board 50.
[0039] In other embodiments, the number of dummy data lines 30, thin-film chips 40, and printed circuit boards 50 is not limited to those described above. For example, dummy data lines 30 are provided in the non-display areas NA on opposite sides along the first direction D1. Each dummy data line 30 is electrically connected via a corresponding printed circuit board 50 to one of the multiple data lines 20 driven by the same thin-film chip 40 to receive the data signal of the selected data line 20a.
[0040] In some embodiments, the selected data line 20a is any one of multiple data lines 20 driven by the same thin-film chip 40. When electric field uniformity is not a primary consideration, or can be compensated for by other means, the data line 20 with the most convenient wiring or the most stable signal can be selected as the selected data line 20a to simplify the design.
[0041] like Figure 3 As shown, in some embodiments, the selected data line 20a is the data line 20 closest to the dummy data line 30 among multiple data lines 20 driven by the same thin film chip 40, in order to facilitate wiring.
[0042] In some embodiments, a plurality of pixels P are arranged in a predetermined color period. The selection of the selected data line 20a is based on the predetermined color period and the color of the pixel P immediately adjacent to the dummy data line 30 within the display area AA.
[0043] Therefore, by strategically selecting the signal source of the dummy data line 30, it is beneficial to balance the electric field distribution at the edge of the display area AA, reduce the unexpected impact of the potential of the dummy data line 30 on the neighboring pixel P, and thus improve the display effect, such as reducing color shift or uneven brightness.
[0044] In some embodiments, "pixels adjacent to the dummy data line" refers to the column of pixels that is physically closest to the dummy data line.
[0045] In some embodiments, "pixels corresponding to the selected data line" refers to the color of a column of pixels electrically connected to the selected data line, or the color of a column of pixels driven by the selected data line.
[0046] In some embodiments, the predetermined color cycle is a red (R), green (G), and blue (B) cycle. The pixel P immediately adjacent to the dummy data line 30 is blue, and the pixel P corresponding to the selected data line 20a is red, so that the dummy data line 30 acquires the data signal of the red pixel P. That is, along the first direction D1, multiple pixels P are arranged periodically as a column of red pixels P, a column of green pixels P, a column of blue pixels P, a column of red pixels P, a column of green pixels P, a column of blue pixels P... a column of red pixels P, a column of green pixels P, and a column of blue pixels P. Along the first direction D1, the column of pixels P immediately adjacent to the dummy data line 30 is blue. The column of pixels P driven by the selected data line 20a is red. This helps to make the electric field in the display area AA more uniform.
[0047] In some embodiments, the predetermined color period is an RGB cycle. If the color of pixel P adjacent to the dummy data line 30 is red, then the color of pixel P corresponding to the selected data line 20a is green, so that the dummy data line 30 can acquire the data signal of the green pixel P.
[0048] In some embodiments, the predetermined color period is an RGB cycle. If the color of pixel P adjacent to the dummy data line 30 is green, then the color of pixel P corresponding to the selected data line 20a is blue, so that the dummy data line 30 can acquire the data signal of the blue pixel P.
[0049] like Figure 4 As shown, the predetermined color cycle of multiple pixels P on the display panel 100 is RGB cycle. The color of the column of pixels P immediately adjacent to the dummy data line 30 is blue, and the color of the pixel P corresponding to the selected data line 20a is red. It should be noted that... Figure 4 The diagram of the display panel 100 is simplified, showing only one of the multiple scan lines 10.
[0050] In some embodiments, the predetermined color period can be, but is not limited to, RGBW (red, green, blue, white). To make the electric field in the display area AA more uniform, the selection of data line 20a can be based on a period of one pixel P. For example, D(1) is R pixel P, D(2) is G pixel P, D(3) is B pixel P, D(4) is white pixel P, and RGBW is a cycle. Then, when the color of a column of pixels P adjacent to the dummy data line 30 is R pixel, the color of the pixel P corresponding to the selected data line 20a is G pixel; when the color of a column of pixels P adjacent to the dummy data line 30 is G pixel P, the color of the pixel P corresponding to the selected data line 20a is B pixel; when the color of a column of pixels P adjacent to the dummy data line 30 is B pixel, the color of the pixel P corresponding to the selected data line 20a is W pixel; when the color of a column of pixels P adjacent to the dummy data line 30 is W pixel, the color of the pixel P corresponding to the selected data line 20a is R pixel.
[0051] Please refer to it again. Figure 2 In some embodiments, the display panel 100 also includes at least one amplifier 60. The amplifier 60 is electrically connected between the selected data line 20a and the dummy data line 30.
[0052] By providing at least one amplifier 60, it is beneficial to ensure that the data signal derived from the selected data line 20a has sufficient strength and stability to drive the dummy data line 30. The original data line 20 signal may attenuate after long-distance transmission or connection point loss; the amplifier 60 can compensate for these losses, ensuring that the dummy data line 30 receives a valid electrical signal.
[0053] Figure 2 The diagram illustrates one amplifier 60. In other embodiments, there may be multiple amplifiers 60, which may be connected in series or in parallel.
[0054] In some embodiments, amplifier 60 may be, but is not limited to, an operational amplifier.
[0055] In some embodiments, amplifier 60 is disposed on thin-film chip 40. Integrating amplifier 60 on thin-film chip 40 can save system space and improve integration.
[0056] In some embodiments, such as Figure 5 As shown, amplifier 60 is mounted on printed circuit board 50. Mounting amplifier 60 on printed circuit board 50 allows for the use of discrete components or integrated chips, offering greater flexibility in cost and design.
[0057] In some embodiments, the printed circuit board 50 includes a test point 51. The test point 51 is electrically connected to a selected data line 20a. The dummy data line 30 is also configured to be fused with a target scan line 10a among multiple scan lines 10, so that after the electrical connection between the selected data line 20a and the test point 51 is broken, the test point 51 can be used to measure the signal of the target scan line 10a. Thus, by converting the dummy data line 30 into a monitoring point for the scan line 10 signal when needed, the convenience of signal analysis during the research, development, production, or maintenance phases of the display panel 100 is greatly improved, eliminating the need for dedicated scan line 10 test pads or leads, saving space and cost.
[0058] In some embodiments, the display panel 100 further includes a signal lead 70, which connects the selected data line 20a and the input terminal of the amplifier 60. The output terminal of the amplifier 60 is electrically connected to the test point 51, and one end of the dummy data line 30 is directly electrically connected to the test point 51. Thus, the test point 51 measures the signal at the output terminal of the amplifier 60. Laser cutting of the signal lead 70 before the input of the amplifier 60 isolates the data signal and connects it to the scan line 10 signal, which helps ensure the accuracy of the test configuration.
[0059] In some embodiments, test point 51 is an exposed conductive contact. Exposed test point 51 facilitates direct probe contact and simplifies the testing procedure.
[0060] In some embodiments, test point 51 is a non-exposed conductive contact, and its surface is covered with an insulating protective layer. Covering test point 51 with a protective layer helps ensure its durability and safety. The insulating protective layer can be, but is not limited to, green paint.
[0061] like Figure 6 As shown, when the display panel 100 needs to monitor the signal of the scan line 10, the virtual data line 30 can be converted into the scan line 10 monitoring signal line by laser cutting or welding.
[0062] Specifically, first, the scan line 10 (target scan line 10a) to be analyzed and monitored is electrically connected to the dummy data line 30 by laser welding. Then, the signal lead 70 is laser-cut so that the amplifier 60 (if there is an amplifier 60) no longer receives data signals. Afterwards, if the test point is an exposed test point 51, the signal of the target scan line 10a can be directly measured; if the test point 51 is not exposed, the insulation protective layer is removed before measurement.
[0063] The display panel 100 of this application embodiment has at least the following advantages:
[0064] First, optimize the electric field force: In some embodiments of this application, the selected data line 20a is selected with a period of one pixel P, which can make the electric field force in the display area AA more uniform, thereby avoiding problems such as color difference or brightness unevenness caused by uneven electric field force, and improving the display effect.
[0065] Second, reducing system complexity and cost: In this embodiment of the application, by connecting one or more amplifiers 60 between the selected data line 20a and the dummy data line 30, the data signal of the selected data line 20a is stably output to the dummy data line 30. This method can not only ensure signal stability, but also effectively reduce display problems caused by uneven electric field force. Therefore, from an overall perspective, it is beneficial to reduce system complexity and cost.
[0066] Third, reduced system load: In this embodiment, the thin-film chip 40 does not need an additional startup channel to control the dummy data line 30, for example: corresponding to Figure 1 As shown in the diagram, the thin-film chip 960CH can be used for normal driving, without the need to start the 961CH setting to control the dummy data line signal. This reduces the system load and improves the system's operating efficiency.
[0067] Fourth, flexible application environment: In this embodiment, the thin film chip 40 can be driven normally in both UD products and other types of products without the need for additional startup channel settings to control the dummy data line 30 signal. This makes the display panel 100 of this embodiment more flexible and adaptable, and can be used in more application environments.
[0068] This application also provides a display device (not shown). The display device includes the display panel 100 of any of the above embodiments. The display device can be, but is not limited to, a television, monitor, mobile phone, tablet computer, etc. The display device has at least the same advantages as the display panel 100 described above, and will not be repeated here.
[0069] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.
Claims
1. A display panel having a display area and a non-display area surrounding the display area, characterized in that, The display panel includes: Multiple scan lines are arranged within the display area; Multiple data lines are arranged within the display area and intersect with the multiple scan lines to form multiple pixels; At least one dummy data line is provided in the non-display area; At least one thin-film chip is electrically connected to the plurality of data lines to drive the plurality of data lines, the thin-film chip not including any additional channels dedicated to connecting the dummy data lines; and At least one printed circuit board electrically connected to the at least one thin-film chip; The dummy data line is electrically connected to one of the multiple data lines via the printed circuit board to receive the data signal from the selected data line.
2. The display panel according to claim 1, characterized in that, The plurality of pixels are arranged in a predetermined color period, and the selection of the selected data line is based on the predetermined color period and the color of the pixel in the display area immediately adjacent to the dummy data line.
3. The display panel according to claim 2, characterized in that, The predetermined color cycle is a red, green, and blue cycle; wherein, the pixel adjacent to the dummy data line is blue, and the pixel corresponding to the selected data line is red; or, the pixel adjacent to the dummy data line is red, and the pixel corresponding to the selected data line is green; or, the pixel adjacent to the dummy data line is green, and the pixel corresponding to the selected data line is blue.
4. The display panel according to claim 1, characterized in that, The selected data line is any one of the multiple data lines.
5. The display panel according to claim 1, characterized in that, The display panel also includes at least one amplifier electrically connected between the selected data line and the dummy data line.
6. The display panel according to claim 5, characterized in that, The amplifier is disposed on the thin-film chip; or, the amplifier is disposed on the printed circuit board.
7. The display panel according to any one of claims 1 to 6, characterized in that, The printed circuit board includes a test point electrically connected to the selected data line. The dummy data line is also configured to be fused with a target scan line among the plurality of scan lines, such that after the electrical connection between the selected data line and the test point is broken, the test point can be used to measure the signal of the target scan line.
8. The display panel according to claim 7, characterized in that, If the display panel also includes an amplifier, the display panel also includes a signal lead connecting the selected data line and the input terminal of the amplifier, and the output terminal of the amplifier is electrically connected to the test point.
9. The display panel according to claim 7, characterized in that, The test point is an exposed conductive contact; or, the surface of the test point is covered with an insulating protective layer.
10. A display device, characterized in that, Includes the display panel according to any one of claims 1 to 9.