Touch display panel

Abstract

This invention provides a touch display panel comprising a pixel circuit substrate, a color filter substrate, and a display medium layer. The pixel circuit substrate includes multiple pixel structures, multiple data lines, multiple touch sensing electrodes, multiple touch signal lines, and at least one test circuit. Each of the multiple pixel structures disposed in the display area has an active element and a pixel electrode electrically connected to each other. The data lines are electrically connected to the multiple active elements of these pixel structures. The touch sensing electrodes are overlapped with the multiple pixel electrodes of these pixel structures. The touch signal lines are electrically connected to the touch sensing electrodes. At least one test circuit is electrically connected to the touch signal lines or at least a portion of the data lines. The test circuit includes peripheral traces electrically connected to each other, a first test pad, and a second test pad. The first test pad and the second test pad are respectively disposed on a first side and a second side of the display area. The display medium layer is disposed between the pixel circuit substrate and the color filter substrate.

Description

Technical Field

[0001] This invention relates to a display panel, and more particularly to a touch display panel. Background Technology

[0002] The applications of displays are becoming increasingly widespread, ranging from home audio-visual entertainment and public information displays to gaming monitors and mobile electronic products. In recent years, the application of displays in the automotive field and wearable electronic products has also gradually expanded, such as rearview mirrors, dashboards, and multi-functional electronic watches / wristbands. Most of the displays in these electronic devices have touch functionality. Due to the advantage of in-cell touch technology in achieving thinner designs, it has gradually become one of the mainstream technologies for touch displays. One proposed technology involves dividing the common electrode layer for the display into multiple electrode patterns to simultaneously serve as touch sensing electrodes. This design allows the display chip and touch chip of such touch display panels to be integrated, thereby reducing production costs and increasing the yield of downstream modules. However, as the resolution of display screens increases, touch display panels using this solution are prone to issues such as checkerboard patterns and color shifts when performing panel quality testing on low grayscale test screens. This can affect the judgment of panel display quality, leading to false detections and impacting the yield of subsequent processes. Summary of the Invention

[0003] This invention relates to a touch display panel with a high production yield.

[0004] According to an embodiment of the present invention, a touch display panel includes a pixel circuit substrate, a color filter substrate, and a display medium layer. The pixel circuit substrate has a display area and a peripheral area outside the display area. The pixel circuit substrate includes a plurality of pixel structures, a plurality of data lines, a plurality of touch sensing electrodes, a plurality of touch signal lines, and at least one test circuit. These pixel structures are disposed within the display area and each has an active element and a pixel electrode electrically connected to each other. The data lines are electrically connected to the plurality of active elements of these pixel structures. The touch sensing electrodes are overlapped on the plurality of pixel electrodes of these pixel structures and are structurally separated from each other. The touch signal lines are electrically connected to the touch sensing electrodes. At least one test circuit is disposed within the peripheral area and is electrically connected to the touch signal lines or at least a portion of the data lines. The test circuit includes peripheral traces, a first test pad, and a second test pad. The peripheral traces extend from a first side of the display area to a second side of the display area. The first side is opposite to the second side. The first test pad and the second test pad are respectively disposed on the first side and the second side of the display area and are electrically connected to the peripheral traces. The color filter substrate is disposed opposite to the pixel circuit substrate. The display medium layer is disposed between the pixel circuit board and the color filter board.

[0005] In a touch display panel according to an embodiment of the present invention, a plurality of touch sensing electrodes are arranged in q strings in a first direction. At least one test circuit consists of m test circuits electrically isolated from each other. Each string of touch electrodes is electrically connected to m test circuits, where m and q are positive integers greater than 1.

[0006] In a touch display panel according to an embodiment of the present invention, each touch electrode string has p touch sensing electrodes, and these p touch sensing electrodes are electrically connected to m test circuits respectively, where p is a positive integer greater than 1.

[0007] In the touch display panel according to an embodiment of the present invention, each of the m test circuits further includes n test pads, which are disposed between the first test pad and the second test pad and electrically connected to the peripheral traces, where n is a positive integer.

[0008] In the touch display panel according to an embodiment of the present invention, the test circuit further includes n test pads disposed between the first test pad and the second test pad, and electrically connected to the peripheral traces, where n is a positive integer.

[0009] In a touch display panel according to an embodiment of the present invention, a plurality of touch sensing electrodes are arranged into a plurality of touch electrode strings in an arrangement direction perpendicular to the first test pad, the second test pad, and the n test pads. These touch electrode strings are electrically connected to peripheral traces, and the n test pads and these touch electrode strings are arranged alternately in the arrangement direction.

[0010] In a touch display panel according to an embodiment of the present invention, a plurality of pixel structures include a plurality of first pixel structures, a plurality of second pixel structures, and a plurality of third pixel structures arranged alternately in a first direction. A plurality of data lines include a plurality of first data lines electrically connected to the first pixel structures, a plurality of second data lines electrically connected to the second pixel structures, and a plurality of third data lines electrically connected to the third pixel structures. At least one test circuit includes a first test circuit, a second test circuit, and a third test circuit that are electrically insulated from each other. The first test circuit is electrically connected to the first data lines. The second test circuit is electrically connected to the second data lines. The third test circuit is electrically connected to the third data lines. A first side and a second side of the display area are opposite sides of the display area in the first direction, and the first pixel structures, second pixel structures, and third pixel structures are respectively used to display different colors.

[0011] In the touch display panel according to an embodiment of the present invention, at least one of the first test circuit, the second test circuit and the third test circuit further includes n test pads disposed between the first test pad and the second test pad and electrically connected to the peripheral traces, where n is a positive integer.

[0012] In a touch display panel according to an embodiment of the present invention, a plurality of touch sensing electrodes are arranged in a first direction to form a plurality of first touch electrode strings and a plurality of second touch electrode strings. These first touch electrode strings and the second touch electrode strings are arranged alternately in the first direction. At least one test circuit further includes a fourth test circuit and a fifth test circuit that are electrically isolated from each other. The first touch electrode strings are electrically connected to the fourth test circuit. The second touch electrode strings are electrically connected to the fifth test circuit.

[0013] In the touch display panel according to an embodiment of the present invention, the fourth test circuit and the fifth test circuit each further include n test pads, which are disposed between the first test pad and the second test pad and electrically connected to the peripheral traces, where n is a positive integer.

[0014] Based on the above, in the touch display panel of the embodiments of the present invention, the test circuit located in the peripheral area is electrically connected to at least a portion of multiple touch signal lines or multiple data lines in the display area via peripheral traces. By providing a first test pad and a second test pad electrically connected to the peripheral traces on opposite sides of the display area, the phenomenon of test signal attenuation as the transmission path becomes longer can be avoided, thereby improving the problem of unexpected patterns and / or color shifts appearing on the test screen and helping to improve the production yield of the touch display panel. Attached Figure Description

[0015] Figure 1 This is a cross-sectional schematic diagram of the touch display panel according to the first embodiment of the present invention;

[0016] Figure 2 yes Figure 1 A top view of the pixel circuit board;

[0017] Figure 3 This is a top view schematic diagram of the touch display panel according to the second embodiment of the present invention;

[0018] Figure 4 This is a top view schematic diagram of the touch display panel according to the third embodiment of the present invention;

[0019] Figure 5 This is a top view schematic diagram of the touch display panel according to the fourth embodiment of the present invention;

[0020] Figure 6 This is a top view schematic diagram of the touch display panel according to the fifth embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures

[0022] 10: Touch display panel;

[0023] 100, 100A, 100B, 100C, 100D: Pixel circuit board;

[0024] 110: substrate;

[0025] 200: Color filter substrate;

[0026] 300: Display media layer;

[0027] DA: Display area;

[0028] DAs1: First side;

[0029] DAs2: Second side;

[0030] DL, DL1, DL2, DL3: Data cables;

[0031] GL: Scan line;

[0032] PA: Surrounding area;

[0033] PE: Pixel electrode;

[0034] PL, PL1, PL2, PL3, PL4, PL5: Peripheral wiring;

[0035] PX: Pixel structure;

[0036] T: Active component;

[0037] TC, TC', TC1, TC2, TC3, TC4, TC5, TC3A, TC4A, TC5A, TC1B, TC2B, TC3B, TC4B: Test circuit;

[0038] TE1, TE2, TE3, TE4: Touch sensing electrodes;

[0039] TES, TES1, TES2, TES3, TES4: Touch electrode string;

[0040] TL1, TL2, TL3, TL4, TL-A, TL-B, TL1A, TL2A, TL3A, TL4A, TL1B, TL2B, TL3B, TL4B: Touch signal lines;

[0041] TPa, TPb, TPc, TPd, TPe, TP1a, TP1b, TP1c, TP1d, TP1e, TP2a, TP2b, TP2c, TP3a, TP3b, TP3c, TP4a, TP4b, TP4c, TP5a, TP5b, TP5c: Test pad;

[0042] X, Y, Z: Direction. Detailed Implementation

[0043] Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same element symbols are used in the drawings and description to denote the same or similar parts.

[0044] Figure 1 This is a cross-sectional schematic diagram of the touch display panel according to the first embodiment of the present invention. Figure 2 yes Figure 1 A top view of the pixel circuit board. Please refer to... Figure 1 and Figure 2 The touch display panel 10 includes a pixel circuit substrate 100, a color filter substrate 200, and a display medium layer 300. The color filter substrate 200 is disposed opposite to the pixel circuit substrate 100, and the display medium layer 300 is disposed between the pixel circuit substrate 100 and the color filter substrate 200. For example, in this embodiment, the color filter substrate 200 may include a light-shielding pattern layer (not shown) and a light-filtering pattern layer (not shown). The light-shielding pattern layer has multiple openings, and these openings can define multiple pixel areas of the touch display panel 10. The light-filtering pattern layer may include a variety of light-filtering patterns, which are respectively overlapped on these pixel areas and adapted to allow light of different colors (or wavelengths) to pass through, so that the touch display panel 10 has a color display effect.

[0045] The display medium layer 300 is, for example, a liquid crystal layer, and the liquid crystal molecules of this liquid crystal layer operate in, for example, twist deformation (TN), vertical alignment (VA), in-plane switching (IPS), optically compensated birefringence (OCB), electrically controlled birefringence (ECB), or other suitable liquid crystal modes, which is not limited by the present invention.

[0046] The pixel circuit board 100 has a display area DA and a peripheral area PA outside the display area DA. The pixel circuit board 100 includes a substrate 110, a plurality of pixel structures PX, a plurality of data lines DL, and a plurality of scan lines GL. For example, the data lines DL may be arranged on the substrate 110 along the X direction and extend in the Y direction, while the scan lines GL may be arranged on the substrate 110 along the Y direction and extend in the X direction, wherein the X direction may optionally be perpendicular to the Y direction, but is not limited thereto. The pixel structures PX may be respectively disposed within the aforementioned plurality of pixel areas (not shown) and are respectively electrically connected to a corresponding data line DL and a corresponding scan line GL. More specifically, the pixel structure PX includes an active element T and a pixel electrode PE electrically connected to each other, wherein the active element T is electrically connected between the pixel electrode PE and the data line DL (or scan line GL).

[0047] Furthermore, the pixel circuit substrate 100 also includes multiple touch sensing electrodes and multiple touch signal lines. These structurally separated touch sensing electrodes are electrically connected to a corresponding touch signal line and overlap with multiple pixel electrodes PE of multiple pixel structures PX in the normal direction (e.g., direction Z) of the substrate 110 surface. In this embodiment, these touch sensing electrodes have different functions at different operating times. For example, during the touch time, they serve as touch sensing electrodes; during the display time, they can also serve as common electrodes for display pixels.

[0048] For example, in this embodiment, these touch sensing electrodes can be arranged into four touch electrode strings (TES) along direction X, and each touch electrode string (TES) has four touch sensing electrodes, namely touch sensing electrode TE1, touch sensing electrode TE2, touch sensing electrode TE3, and touch sensing electrode TE4, but this is not a limitation. These four touch sensing electrodes are arranged on the substrate 110 along direction Y and are electrically connected to touch signal lines TL1, TL2, TL3, and TL4, respectively. It should be noted that in this embodiment, the number of touch sensing electrodes is illustrated by example as sixteen, and does not mean that the present invention is limited by the content disclosed in the accompanying drawings. In other embodiments, the number of touch sensing electrodes arranged in the horizontal or vertical direction of the touch display panel can be adjusted according to different product requirements. For example, multiple touch sensing electrodes can be arranged into q touch electrode strings (TES) along direction X, each touch electrode string (TES) has p touch sensing electrodes, and p and q are positive integers greater than 1.

[0049] Generally, before the touch display panel is assembled with the driver circuit board, the touch display panel is first tested for image quality to eliminate touch display panels with display abnormalities from entering the subsequent assembly process, resulting in unnecessary cost losses. Therefore, the touch display panel also includes a test circuit disposed in the peripheral area PA for generating a test image. In this embodiment, the test circuit TC of the pixel circuit board 100 is optionally electrically connected to multiple touch signal lines. Specifically, the test circuit TC includes a peripheral trace PL and two test pads TPa and TPb. The peripheral trace PL extends from the first side DAs1 of the display area DA to the second side DAs2 of the display area and is electrically connected to multiple touch signal lines. Here, the first side DAs1 and the second side DAs2 are, for example, opposite sides of the display area DA in the X direction, but are not limited thereto.

[0050] It should be noted that the two test pads TPa and TPb of the test circuit TC are respectively located on the first side DAs1 and the second side DAs2 of the display area DA, and are electrically connected to the opposite ends of the peripheral trace PL. Accordingly, the testing equipment can transmit the test signal from the opposite sides of the display area DA (e.g., DAs1 and DAs2) via these two test pads TPa and TPb. Figure 2 The signal is transmitted to multiple touch sensing electrodes (from both sides) to avoid signal attenuation as the transmission path lengthens, thereby improving the problem of unexpected patterns and / or color shifts in the detected image. In other words, it can increase the detection accuracy of display quality, thereby improving the overall yield of the touch display panel 10 in subsequent assembly processes.

[0051] Other embodiments will be listed below to illustrate this disclosure in detail, wherein the same components will be labeled with the same symbols, and the description of the same technical content will be omitted. For the omitted parts, please refer to the foregoing embodiments, and they will not be repeated below.

[0052] Figure 3 This is a top view schematic diagram of the touch display panel according to the second embodiment of the present invention. Please refer to... Figure 3 In this embodiment, the pixel circuit board 100A and Figure 2 The main difference between the pixel circuit board 100 and the other is the number of test circuits. In this embodiment, the pixel circuit board 100A has five test circuits: test circuit TC1, test circuit TC2, test circuit TC3, test circuit TC4, and test circuit TC5. Test circuits TC1 and TC2 are electrically connected to multiple touch signals, while test circuits TC3, TC4, and TC5 are electrically connected to multiple data lines.

[0053] In this embodiment, multiple touch sensing electrodes can be arranged into a first touch electrode string TES1, a second touch electrode string TES2, a third touch electrode string TES3, and a fourth touch electrode string TES4, and these touch electrode strings can be arranged on the substrate 110 along the X direction. Specifically, multiple touch signal lines TL-A electrically connected to the first touch electrode string TES1 and the third touch electrode string TES3 are electrically connected to the peripheral trace PL1 of the test circuit TC1, while multiple touch signal lines TL-B electrically connected to the second touch electrode string TES2 and the fourth touch electrode string TES4 are electrically connected to the peripheral trace PL2 of the test circuit TC2. Two test pads TP1a and TP1b are respectively provided at opposite ends of the peripheral trace PL1 of the test circuit TC1; similarly, two test pads TP2a and TP2b are respectively provided at opposite ends of the peripheral trace PL2 of the test circuit TC2.

[0054] On the other hand, in this embodiment, the multiple data lines may include multiple first data lines DL1, multiple second data lines DL2, and multiple third data lines DL3, and the first data lines DL1, second data lines DL2, and third data lines DL3 are arranged alternately in the X direction. For example, in this embodiment, the pixel structure PX electrically connected to the first data line DL1 is adapted to display red, the pixel structure PX electrically connected to the second data line DL2 is adapted to display green, and the pixel structure PX electrically connected to the third data line DL3 is adapted to display blue, but this is not a limitation.

[0055] The first data lines DL1 are electrically connected to the peripheral trace PL3 of the test circuit TC3, the second data lines DL2 are electrically connected to the peripheral trace PL4 of the test circuit TC4, and the third data lines DL3 are electrically connected to the peripheral trace PL5 of the test circuit TC5. The peripheral traces PL3, PL4, and PL5 extend from the first side DAs1 of the display area DA to the second side DAs2 of the display area DA, and each has two test pads at its two ends. More specifically, test pads TP3a ​​and TP3b are provided at opposite ends of the test circuit TC3, test pads TP4a and TP4b are provided at opposite ends of the test circuit TC4, and test pads TP5a and TP5b are provided at opposite ends of the test circuit TC5.

[0056] These test circuits use two test pads at opposite ends of their respective peripheral traces, and the testing equipment transmits the corresponding test signals from opposite sides of the display area DA via these two test pads (e.g., ...). Figure 3 The signal is transmitted from the left and right sides to multiple touch sensing electrodes or multiple pixel structures (PX), which can avoid the phenomenon that the test signal attenuates as the transmission path becomes longer, thereby improving the problem of unexpected patterns and / or color deviation in the detection screen.

[0057] It should be noted that in this embodiment, the number of test circuits electrically connected to the multiple touch electrode strings is illustrated by example with two circuits, and does not imply that the present invention is limited to the content disclosed in the accompanying drawings. For example, in other embodiments, the pixel circuit board may have m test circuits, and these touch electrode strings are electrically connected to these m test circuits, where m is a positive integer greater than 2.

[0058] Figure 4 This is a top view schematic diagram of the touch display panel according to the third embodiment of the present invention. Please refer to... Figure 4 In this embodiment, the pixel circuit board 100B and Figure 3 The main difference between the pixel circuit board 100A and the other is the number of test pads in the test circuit that electrically connects the pixel structure PX (or data lines). In this embodiment, the test circuit TC3A that electrically connects multiple first data lines DL1 has three test pads TP3a, TP3b, and TP3c; the test circuit TC4A that electrically connects multiple second data lines DL2 has three test pads TP4a, TP4b, and TP4c; and the test circuit TC5A that electrically connects multiple third data lines DL3 has three test pads TP5a, TP5b, and TP5c.

[0059] Therefore, the testing equipment can transmit the corresponding test signals from the middle and opposite sides of the display area DA to multiple pixel structures PX via these three test pads, further avoiding the phenomenon of test signal attenuation as the transmission path lengthens, thereby improving the problem of unexpected patterns and / or color shifts in the tested image. It should be understood that the present invention does not limit the number of test pads connected to each test circuit. For example, in other embodiments, the test circuit may have n test pads, where n is a positive integer greater than 1 and not equal to 3.

[0060] It should be noted that, in Figure 3 In the pixel circuit board 100A shown, the test circuits connecting the touch electrode strings, such as test circuit TC1 and test circuit TC2, can also be configured similarly to the test circuits TC3A, TC4A and TC5A in this embodiment, with three test pads evenly distributed on the extension paths of the corresponding peripheral traces to shorten the path length of the test signal transmitted from the testing machine to the multiple touch electrode strings.

[0061] Figure 5 This is a top view schematic diagram of the touch display panel according to the fourth embodiment of the present invention. Please refer to... Figure 5 In this embodiment, the pixel circuit board 100C and Figure 2The main difference between the pixel circuit substrate 100 and the other is that the number of test circuits electrically connecting multiple touch electrode strings is different, and the number of test pads for each test circuit is also different. In this embodiment, the number of test circuits electrically connected to the multiple touch electrode strings is four, for example, test circuit TC1B, test circuit TC2B, test circuit TC3B, and test circuit TC4B.

[0062] It is particularly important to note that each test circuit is electrically connected to one of the touch sensing electrodes of each of these touch electrode strings. For example, test circuit TC1B is electrically connected to the touch sensing electrodes TE1 of the first touch electrode string TES1, TE4 of the second touch electrode string TES2, TE1 of the third touch electrode string TES3, and TE4 of the fourth touch electrode string TES4 via multiple touch signal lines TL1A and TL4B, respectively. Similarly, test circuit TC2B is electrically connected to the touch sensing electrodes TE2 of the first touch electrode string TES1, TE1 of the second touch electrode string TES2, TE2 of the third touch electrode string TES3, and TE1 of the fourth touch electrode string TES4 via multiple touch signal lines TL2A and TL1B, respectively. The test circuit TC3B is electrically connected to the touch sensing electrodes TE3 of the first touch electrode string TES1, TE2 of the second touch electrode string TES2, TE3 of the third touch electrode string TES3, and TE2 of the fourth touch electrode string TES4 via multiple touch signal lines TL3A and TL2B, respectively. The test circuit TC4B is electrically connected to the touch sensing electrodes TE4 of the first touch electrode string TES1, TE3 of the second touch electrode string TES2, TE4 of the third touch electrode string TES3, and TE3 of the fourth touch electrode string TES4 via multiple touch signal lines TL4A and TL3B, respectively.

[0063] In other words, in this embodiment, each touch electrode string is connected to one touch sensing electrode in each test circuit. Therefore, the number of test circuits indicates that each touch electrode string has four touch sensing electrodes. However, the invention is not limited to this; according to other embodiments, the number of touch sensing electrodes in each touch electrode string can also be q, where q is a positive integer not equal to 4.

[0064] Furthermore, in this embodiment, each test circuit is configured with three test pads, which are respectively connected to the opposite ends and the middle portion of its peripheral trace. Here, the middle portion of the peripheral trace refers to the part of the peripheral trace that is approximately aligned with the center of the display area DA in the Y direction, while the two ends of the peripheral trace are approximately aligned with the opposite sides of the display area DA in the Y direction. Compared to Figure 2 The test circuit TC shown in this embodiment also includes test pads disposed in the middle of the peripheral traces, such as test pad TP1c of test circuit TC1B, test pad TP2c of test circuit TC2B, test pad TP3c of test circuit TC3B, and test pad TP4c of test circuit TC4B. This further avoids the phenomenon of test signal attenuation due to the increased transmission path during transmission to multiple touch sensing electrodes (i.e., the common electrode during the display time), thereby improving the problem of unexpected patterns and / or color shifts appearing on the detected screen.

[0065] It should be understood that the present invention does not limit the number of test pads connected to each test circuit. For example, in other embodiments, the test circuit may have n test pads, where n is a positive integer greater than 1 and not equal to 3.

[0066] Figure 6 This is a top view schematic diagram of the touch display panel according to the fifth embodiment of the present invention. Please refer to... Figure 6 In this embodiment, the pixel circuit board 100D and Figure 2 The difference between the pixel circuit board 100 and the original is the number of test pads in the test circuit. To further mitigate the signal attenuation that occurs as the transmission path increases, the test circuit TC' in this embodiment is configured with five test pads: TPa, TPb, TPc, TPd, and TPe. These test pads are distributed approximately evenly along the extension path of the peripheral traces PL. For example, these test pads and multiple touch electrode strings (TES) are arranged alternately in the direction (e.g., direction X) of the TES. Therefore, by using these test pads evenly distributed across the width of the display area DA, the transmission path of the test signal can be effectively shortened, thereby improving the consistency of the display effect in different areas within the display area DA. It should be understood that the present invention does not limit the number of test pads connected to each test circuit. For example, in other embodiments, the test circuit may have n test pads, where n is a positive integer greater than 1 and not equal to 5.

[0067] In summary, in the touch display panel of the embodiments of the present invention, the test circuit located in the peripheral area is electrically connected to at least a portion of multiple touch signal lines or multiple data lines in the display area via peripheral traces. By providing a first test pad and a second test pad electrically connected to the peripheral traces on opposite sides of the display area, the phenomenon of test signal attenuation as the transmission path lengthens can be avoided, thereby improving the problem of unexpected patterns and / or color shifts appearing on the test screen and helping to improve the production yield of the touch display panel.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A touch display panel, characterized in that, include: A pixel circuit board has a display area and a peripheral area outside the display area, the pixel circuit board comprising: Multiple pixel structures are disposed within the display area, each of the multiple pixel structures having an active element and a pixel electrode electrically connected to each other; Multiple data lines electrically connect multiple active elements of the multiple pixel structures; Multiple touch sensing electrodes are overlapped on multiple pixel electrodes of the multiple pixel structure, and are structurally separated from each other; Multiple touch signal lines are electrically connected to the multiple touch sensing electrodes; and At least one test circuit is disposed within the peripheral area and electrically connected to at least a portion of the plurality of touch signal lines or the plurality of data lines, the test circuit comprising: Peripheral wiring extends from a first side of the display area to a second side of the display area, the first side being opposite to the second side; and The first test pad and the second test pad are respectively disposed on the first side and the second side of the display area, and are electrically connected to the peripheral wiring; A color filter substrate is disposed opposite to the pixel circuit substrate; and The display medium layer is disposed between the pixel circuit substrate and the color filter substrate. The test circuit further includes n test pads disposed between the first test pad and the second test pad and electrically connected to the peripheral traces, where n is a positive integer.

2. The touch display panel according to claim 1, characterized in that, The plurality of touch sensing electrodes are arranged in q strings in a first direction, and the at least one test circuit consists of m test circuits that are electrically isolated from each other. Each of the q strings of touch electrodes is electrically connected to the m test circuits, where m and q are positive integers greater than 1.

3. The touch display panel according to claim 2, characterized in that, Each of the q touch electrode strings has p touch sensing electrodes, and the p touch sensing electrodes are electrically connected to the m test circuits respectively, where p is a positive integer greater than 1.

4. The touch display panel according to claim 1, characterized in that, The plurality of touch sensing electrodes are arranged in a plurality of touch electrode strings in a direction perpendicular to the arrangement of the first test pad, the second test pad and the n test pads. The plurality of touch electrode strings are electrically connected to the peripheral traces, and the n test pads and the plurality of touch electrode strings are arranged alternately in the arrangement direction.

5. A touch display panel, characterized in that, include: A pixel circuit board has a display area and a peripheral area outside the display area, the pixel circuit board comprising: Multiple pixel structures are disposed within the display area, each of the multiple pixel structures having an active element and a pixel electrode electrically connected to each other; Multiple data lines electrically connect multiple active elements of the multiple pixel structures; Multiple touch sensing electrodes are overlapped on multiple pixel electrodes of the multiple pixel structure, and are structurally separated from each other; Multiple touch signal lines are electrically connected to the multiple touch sensing electrodes; and At least one test circuit is disposed within the peripheral area and electrically connected to at least a portion of the plurality of touch signal lines or the plurality of data lines, the test circuit comprising: Peripheral wiring extends from a first side of the display area to a second side of the display area, the first side being opposite to the second side; and The first test pad and the second test pad are respectively disposed on the first side and the second side of the display area, and are electrically connected to the peripheral wiring; A color filter substrate is disposed opposite to the pixel circuit substrate; and A display dielectric layer is disposed between the pixel circuit substrate and the color filter substrate. The plurality of touch sensing electrodes are arranged in q strings in a first direction. The at least one test circuit consists of m test circuits that are electrically isolated from each other. Each of the q strings of touch electrodes is electrically connected to the m test circuits, where m and q are positive integers greater than 1. Each of the m test circuits further includes n test pads, which are disposed between the first test pad and the second test pad and are electrically connected to the peripheral traces, where n is a positive integer.

6. A touch display panel, characterized in that, include: A pixel circuit board has a display area and a peripheral area outside the display area, the pixel circuit board comprising: Multiple pixel structures are disposed within the display area, each of the multiple pixel structures having an active element and a pixel electrode electrically connected to each other; Multiple data lines electrically connect multiple active elements of the multiple pixel structures; Multiple touch sensing electrodes are overlapped on multiple pixel electrodes of the multiple pixel structure, and are structurally separated from each other; Multiple touch signal lines are electrically connected to the multiple touch sensing electrodes; and At least one test circuit is disposed within the peripheral area and electrically connected to at least a portion of the plurality of touch signal lines or the plurality of data lines, the test circuit comprising: Peripheral wiring extends from a first side of the display area to a second side of the display area, the first side being opposite to the second side; and The first test pad and the second test pad are respectively disposed on the first side and the second side of the display area, and are electrically connected to the peripheral wiring; A color filter substrate is disposed opposite to the pixel circuit substrate; and A display dielectric layer is disposed between the pixel circuit substrate and the color filter substrate. The plurality of pixel structures include a plurality of first pixel structures, a plurality of second pixel structures, and a plurality of third pixel structures arranged alternately in a first direction. The plurality of data lines include a plurality of first data lines electrically connected to the plurality of first pixel structures, a plurality of second data lines electrically connected to the plurality of second pixel structures, and a plurality of third data lines electrically connected to the plurality of third pixel structures. The at least one test circuit includes a first test circuit, a second test circuit, and a third test circuit that are electrically insulated from each other. The first test circuit is electrically connected to the plurality of first data lines, the second test circuit is electrically connected to the plurality of second data lines, and the third test circuit is electrically connected to the plurality of third data lines. The first side and the second side of the display area are opposite sides of the display area in the first direction, and the first pixel structure, the second pixel structure, and the third pixel structure are respectively used to display different colors.

7. The touch display panel according to claim 6, characterized in that, At least one of the first test circuit, the second test circuit, and the third test circuit further includes: n test pads are disposed between the first test pad and the second test pad and are electrically connected to the peripheral traces, where n is a positive integer.

8. The touch display panel according to claim 6, characterized in that, The plurality of touch sensing electrodes are arranged in the first direction to form a plurality of first touch electrode strings and a plurality of second touch electrode strings, the plurality of first touch electrode strings and the plurality of second touch electrode strings being arranged alternately in the first direction, the at least one test circuit further includes a fourth test circuit and a fifth test circuit that are electrically insulated from each other, the plurality of first touch electrode strings being electrically connected to the fourth test circuit, and the plurality of second touch electrode strings being electrically connected to the fifth test circuit.

9. The touch display panel according to claim 8, characterized in that, The fourth test circuit and the fifth test circuit each further include: n test pads are disposed between the first test pad and the second test pad and are electrically connected to the peripheral traces, where n is a positive integer.

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