Liquid crystal display panel and liquid crystal display device

Abstract

The embodiment of the present application provides a liquid crystal display panel and a liquid crystal display device; the liquid crystal display panel is provided with invalid pixels in a non-display area, the touch wire in the display pixel is connected with the source electrode of the transistor in the invalid pixel, and the reflection pattern is arranged in the invalid pixel, so that the projection of the reflection pattern on the substrate is overlapped with the projection of the pixel electrode in the invalid pixel on the substrate; in the panel test stage, the signal can be input to the touch wire, the light is input to the liquid crystal display panel, whether the liquid crystal deflects or not is determined by observing whether the reflection pattern reflects the light, whether the touch wire and the touch signal line input the electric signal to the transistor in the invalid pixel is determined by the deflection result of the liquid crystal, so that whether the touch wire and the touch signal line exist defects can be determined, the touch unit is tested in the panel test stage, and the technical problem that the yield of the display device is low due to the fact that the touch unit cannot be detected in the panel test stage is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a liquid crystal display panel and a liquid crystal display device. BACKGROUND

[0002] In order to reduce the thickness of the display device, an In-cell (touch control layer is made in the panel) technology is used to design the touch control unit. In the In-cell design, the touch control unit is built in the display device. When the display device is tested by celltest (panel test) lighting test, since the touch control function cannot be realized, the touch control unit cannot be detected, and the detection of the touch control unit can only be performed after the preparation of the display device is completed. However, when the touch control unit fails, the display device can only be repaired by removing other film layers or scrapped, resulting in low yield and high cost of the display device.

[0003] Therefore, the existing display device has the technical problem of low yield of the display device due to the inability to detect the touch control unit in the panel test stage. SUMMARY

[0004] The embodiments of the present application provide a liquid crystal display panel and a liquid crystal display device to alleviate the technical problem of low yield of the display device due to the inability to detect the touch control unit in the panel test stage.

[0005] The embodiments of the present application provide a liquid crystal display panel, which comprises a display area and a non-display area surrounding the display area, and the liquid crystal display panel comprises:

[0006] a substrate;

[0007] a first metal layer disposed on one side of the substrate, the first metal layer comprising a gate electrode and a touch control electrode;

[0008] an active layer disposed on a side of the first metal layer away from the substrate;

[0009] a second metal layer disposed on a side of the active layer away from the first metal layer, the second metal layer comprising a source electrode, a drain electrode and a touch control trace;

[0010] a pixel electrode layer disposed on a side of the second metal layer away from the active layer, the pixel electrode layer comprising a pixel electrode and a touch control signal line;

[0011] The display region is provided with display pixels, and the non-display region is provided with invalid pixels. The display pixel includes a touch electrode, a touch trace and a touch signal line. The invalid pixel includes a gate, a source, a drain and a pixel electrode. One end of the touch signal line is connected with the touch electrode, the other end of the touch signal line is connected with one end of the touch trace, the other end of the touch trace is connected with the source in the invalid pixel, the drain in the invalid pixel is connected with the pixel electrode in the invalid pixel. The liquid crystal display panel further includes a reflection pattern. The reflection pattern is arranged on the side of the pixel electrode layer close to the second metal layer. The projection of the reflection pattern on the substrate overlaps with the projection of the pixel electrode in the invalid pixel on the substrate.

[0012] In some embodiments, the non-display region includes a first non-display region and a second non-display region. The first non-display region and the second non-display region are oppositely arranged with respect to the display region. The first non-display region is provided with a binding terminal. The invalid pixel is arranged in the second non-display region.

[0013] In some embodiments, the display pixel includes a red sub-pixel, a green sub-pixel and a blue sub-pixel. The touch trace of at least one of the red sub-pixel, the green sub-pixel and the blue sub-pixel is connected with the source in the invalid pixel.

[0014] In some embodiments, the invalid pixel includes a first invalid sub-pixel, a second invalid sub-pixel and a third invalid sub-pixel. The touch trace in the red sub-pixel is connected with the source in the first invalid sub-pixel. The touch trace in the green sub-pixel is connected with the source in the second invalid sub-pixel. The touch trace in the blue sub-pixel is connected with the source in the third invalid sub-pixel.

[0015] In some embodiments, the pixel electrode includes a main electrode and a branch electrode. The projection of the touch trace on the substrate overlaps with the projection of the main electrode in the display pixel on the substrate. The projection of the main electrode in the invalid pixel on the substrate is located between the projections of the touch traces on the substrate.

[0016] In some embodiments, the second metal layer further includes a data line. The projection of the data line on the substrate is located on the same straight line as the projection of the main electrode of the invalid pixel on the substrate.

[0017] In some embodiments, the reflection pattern includes a substrate layer, a first reflection layer and a second reflection layer. The first reflection layer is arranged between the substrate layer and the pixel electrode layer. The second reflection layer is arranged between the substrate layer and the substrate.

[0018] In some embodiments, the reflective pattern is disposed on the first metal layer, and the reflective pattern is insulated from the gate.

[0019] In some embodiments, an area of a projection of the reflective pattern on the substrate is greater than an area of a projection of the pixel electrode in the inactive pixel on the substrate.

[0020] Meanwhile, the embodiments of the present application provide a liquid crystal display device, which comprises the liquid crystal display panel and the backlight module according to any one of the above embodiments.

[0021] Beneficial effects: the embodiments of the present application provide a liquid crystal display panel and a liquid crystal display device; the liquid crystal display panel comprises a display area and a non-display area arranged around the display area, and the liquid crystal display panel comprises a substrate, a first metal layer, an active layer, a second metal layer and a pixel electrode layer, the first metal layer is arranged on one side of the substrate, the first metal layer comprises a gate and a touch electrode, the active layer is arranged on a side of the first metal layer away from the substrate, the second metal layer is arranged on a side of the active layer away from the first metal layer, the second metal layer comprises a source, a drain and a touch trace, the pixel electrode layer is arranged on a side of the second metal layer away from the active layer, and the pixel electrode layer comprises a pixel electrode and a touch signal line, wherein the display area is provided with a display pixel, the non-display area is provided with an inactive pixel, the display pixel comprises the touch electrode, the touch trace and the touch signal line, the inactive pixel comprises the gate, the source, the drain and the pixel electrode, one end of the touch signal line is connected with the touch electrode, the other end of the touch signal line is connected with one end of the touch trace, the other end of the touch trace is connected with the source in the inactive pixel, the drain in the inactive pixel is connected with the pixel electrode in the inactive pixel, and the liquid crystal display panel further comprises a reflective pattern, the reflective pattern is arranged on a side of the pixel electrode close to the second metal layer, a side of the reflective pattern close to the pixel electrode layer is used for reflecting light, and a projection of the reflective pattern on the substrate overlaps with a projection of the pixel electrode in the inactive pixel on the substrate. According to the present application, the inactive pixel is arranged in the non-display area, the touch trace in the display pixel is connected with the source of the transistor in the inactive pixel, and the reflective pattern is arranged in the inactive pixel, so that the projection of the reflective pattern on the substrate overlaps with the projection of the pixel electrode in the inactive pixel on the substrate. In the panel test stage, a signal can be input to the touch trace, and light can be input to the liquid crystal display panel, whether the light is reflected by the reflective pattern is observed to determine whether the liquid crystal deflects, whether the touch trace and the touch signal line input the electric signal to the transistor in the inactive pixel is determined according to the deflection result of the liquid crystal, whether the touch trace and the touch signal line have defects can be determined, the touch unit is tested in the panel test stage, and the technical problem that a display device has a low yield due to the failure to detect the touch unit in the panel test stage is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0022] The technical solutions and other beneficial effects of the present application will be apparent from the following detailed description of the embodiments of the present application, taken in conjunction with the accompanying drawings.

[0023] Figure 1 A first schematic diagram of a liquid crystal display panel provided by an embodiment of the present application.

[0024] Figure 2 A second schematic diagram of a liquid crystal display panel provided by an embodiment of the present application.

[0025] Figure 3 A first schematic diagram of a display pixel provided by an embodiment of the present application.

[0026] Figure 4 A second schematic diagram of a display pixel provided by an embodiment of the present application.

[0027] Figure 5 A first schematic diagram of an invalid pixel provided by an embodiment of the present application.

[0028] Figure 6 A second schematic diagram of an invalid pixel provided by an embodiment of the present application.

[0029] Figure 7 A schematic diagram of a liquid crystal display device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0030] The technical solutions and other beneficial effects of the present application will be apparent from the following detailed description of the embodiments of the present application, taken in conjunction with the accompanying drawings.

[0031] In the description of the application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0032] In the description of the application, it needs to be explained that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0033] In this application, unless otherwise explicitly specified and limited, the first feature "on" the second feature

[0034] Or "below" can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature

[0035] "on", "above" and "above" include that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0036] The following disclosure provides many different implementations or examples for carrying out different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or reference letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself imply...

[0037] This indicates the relationship between the various implementation methods and / or arrangements discussed. Furthermore, this application provides examples of various specific processes and materials, but those skilled in the art will recognize the application of other processes.

[0038] The use of and / or other materials.

[0039] This application addresses the technical problem of low yield rates in existing display devices due to the inability to detect the touch layer during panel testing. It provides a liquid crystal display panel and a liquid crystal display device to alleviate the aforementioned technical problem.

[0040] 0 Figure 1 This is a first schematic diagram of a liquid crystal display panel provided in an embodiment of this application; Figure 2 This is a second schematic diagram of a liquid crystal display panel provided in an embodiment of this application; Figure 3 A first schematic diagram of display pixels provided in an embodiment of this application; Figure 4 A second schematic diagram of display pixels provided in an embodiment of this application; Figure 5 A first schematic diagram of invalid pixels provided in an embodiment of this application; Figure 6 A second schematic diagram of invalid pixels provided in an embodiment of this application.

[0041] 5 such as Figures 1 to 6 As shown, this application embodiment provides a liquid crystal display panel 1, which includes a display area 11 and a non-display area 12 surrounding the display area 11. The liquid crystal display panel 1 includes:

[0042] Substrate 21;

[0043] A first metal layer 22 is disposed on one side of the substrate 21, and the first metal layer 22 includes a gate 221 and a touch electrode 222.

[0044] An active layer 24 is disposed on the side of the first metal layer 22 away from the substrate 21;

[0045] The second metal layer 25 is disposed on the side of the active layer 24 away from the first metal layer 22. The second metal layer 25 includes a source 251, a drain 252 and a touch trace 253.

[0046] A pixel electrode layer 27 is disposed on the side of the second metal layer 25 away from the active layer 24, and includes a pixel electrode 271 and a touch signal line 272.

[0047] The display area 11 is provided with display pixels 14, and the non-display area 12 is provided with invalid pixels 15. The display pixels 14 include a touch electrode 222, a touch trace 253, and a touch signal line 272. The invalid pixels 15 include a gate 221, a source 251, a drain 252, and a pixel electrode 271. One end of the touch signal line 272 is connected to the touch electrode 222, and the other end of the touch signal line 272 is connected to one end of the touch trace 253. The other end of the touch trace 253 is connected to the source 251 in the invalid pixel 15. The drain 252 in the invalid pixel 15 is connected to the pixel electrode 271 in the invalid pixel 15. The liquid crystal display panel 1 further includes a reflection pattern 224 disposed on the side of the pixel electrode layer 27 close to the second metal layer 25, and the projection of the reflection pattern 224 on the substrate 21 overlaps the projection of the pixel electrode 271 in the invalid pixel 15 on the substrate 21.

[0048] The liquid crystal display panel provided by the embodiment of the present application sets invalid pixels in the non-display area, connects the touch trace in the display pixel to the source of the transistor in the invalid pixel, and sets a reflection pattern in the invalid pixel, so that the projection of the reflection pattern on the substrate overlaps the projection of the pixel electrode in the invalid pixel on the substrate. In the panel testing stage, a signal can be input to the touch trace, and light can be input to the liquid crystal display panel. Whether the reflection pattern reflects the light is observed to determine whether the liquid crystal deflects. The deflection result of the liquid crystal is used to determine whether the touch trace and the touch signal line input the electrical signal to the transistor in the invalid pixel, so that whether the touch trace and the touch signal line have defects can be determined. The technical problem that the yield of the display device is low because the touch unit cannot be detected in the panel testing stage is solved.

[0049] It should be noted that, Figure 3 and Figure 5 In order to facilitate viewing the positions of the structures of each film layer in the liquid crystal display panel, the sizes of the structures are adjusted, and the design of each film layer is schematically shown by perspective, for example, in Figure 3 In the above embodiment, the touch electrode 222 is schematically shown in the slit of the pixel electrode 271, but it can be understood that, in the actual design, there are multiple film layers between the pixel electrode and the touch electrode, and the touch electrode cannot be seen from the slit of the pixel electrode. For the relative positions of each film layer, refer to Figure 4 andFigure 6 .

[0050] In an embodiment, as shown in Figure 1 , the non-display area 12 includes a first non-display area 121 and a second non-display area 122, the first non-display area 121 and the second non-display area 122 are oppositely arranged with respect to the display area 11, the first non-display area 121 is provided with a binding terminal 13, and the invalid pixel 15 is arranged in the second non-display area 122. By arranging the invalid pixel in the second non-display area, the entire touch control line in the touch control unit can be detected when the touch control unit is detected, avoiding the problem that the touch control unit cannot be detected.

[0051] Specifically, the signal (including the test signal and the touch signal) of the touch control unit is input from one end provided with the binding terminal. In the embodiment of the present application, the invalid pixel is arranged on the side opposite to the binding terminal. Therefore, when the touch control unit is detected, the entire touch control line on the touch control unit is detected, thereby preventing the touch control line in the touch control unit from being missed, and reducing the yield of the liquid crystal display panel.

[0052] Specifically, the present application only limits that the first non-display area is provided with the binding terminal, but it can be understood that the test terminal is generally arranged on one side of the binding terminal.

[0053] Specifically, the junction of the invalid pixel and the display pixel is located at the junction of the display area and the non-display area. By arranging the invalid pixel in the region where the non-display area and the display area meet, the space occupied by the invalid pixel in the non-display area is smaller, thereby avoiding that the non-display area is too large, resulting in that the frame of the liquid crystal display panel is too large.

[0054] In an embodiment, as shown in Figure 1 , the display pixel 14 includes red sub-pixels 141, green sub-pixels 142 and blue sub-pixels 143 arranged in an array, and the touch control line of at least one of the red sub-pixels 141, the green sub-pixels 142 and the blue sub-pixels 143 is connected to the source electrode in the invalid pixel 15. By connecting the touch control line of at least one of the red sub-pixel, the green sub-pixel and the blue sub-pixel to the source electrode in the invalid pixel, the touch control unit of at least one of the red sub-pixel, the green sub-pixel and the blue sub-pixel can be detected through the source electrode in the invalid pixel, thereby avoiding the technical problem that the yield of the display device is low due to the failure to detect the touch control unit in the panel test stage.

[0055] Specifically, for the design that each sub-pixel is provided with a touch unit, the touch unit in each sub-pixel can be connected with the source electrode of the invalid pixel, so that the touch unit in each sub-pixel can be detected in the panel test stage, thereby avoiding the technical problem that the yield of the display device is low due to the failure to detect the touch unit in the panel test stage.

[0056] In an embodiment, as shown in Figure 1 The invalid pixel 15 includes a first invalid sub-pixel 151, a second invalid sub-pixel 152, and a third invalid sub-pixel 153. The touch wire in the red sub-pixel 141 is connected with the source electrode in the first invalid sub-pixel 151, the touch wire in the green sub-pixel 142 is connected with the source electrode in the second invalid sub-pixel 152, and the touch wire in the blue sub-pixel 143 is connected with the source electrode in the third invalid sub-pixel 153. By connecting the touch wire in the red sub-pixel, the touch wire in the green sub-pixel, and the touch wire in the blue sub-pixel with the source electrode in the first invalid sub-pixel, the second invalid sub-pixel, and the third invalid sub-pixel respectively, the touch unit can be detected in the panel test stage by inputting a signal to the touch wire of the red sub-pixel, the green sub-pixel, and the blue sub-pixel respectively, and observing whether the first invalid sub-pixel, the second invalid sub-pixel, and the third invalid sub-pixel reflect light. Whether the touch wire of each sub-pixel is invalid can be determined according to whether the invalid sub-pixel reflects light, thereby avoiding the technical problem that the yield of the display device is low due to the failure to detect the touch unit in the panel test stage.

[0057] Specifically, for the design that one touch unit is arranged in each pixel, the touch unit in each pixel can be connected with the source electrode of the invalid pixel, so that the touch unit in each pixel can be detected in the panel test stage, thereby avoiding the technical problem that the yield of the display device is low due to the failure to detect the touch unit in the panel test stage.

[0058] The technical problem of low aperture ratio of the pixel caused by the separate arrangement of the touch unit. In an embodiment, as shown in Figures 2 to 6As shown, the pixel electrode 271 includes a main electrode 271a and a branch electrode 271b. The projection of the touch trace 253 on the substrate 21 coincides with the projection of the main electrode 271a in the display pixel 14 on the substrate 21. The projection of the main electrode 271a in the invalid pixel 15 on the substrate 21 is located between the projections of the touch trace 253 on the substrate 21. By setting the touch trace in the corresponding area of ​​the main electrode, the touch trace is avoided from occupying the space of the opening area, thus improving the aperture ratio of the liquid crystal display panel. By setting the main electrode in the invalid pixel between the touch traces, when setting the touch trace, the touch trace can be directly extended and connected to the source electrode in the invalid pixel, so that the space occupied by each invalid pixel is small, eliminating the need to set multiple columns of invalid pixels and avoiding excessive space occupied by invalid pixels, which would lead to an excessively large bezel of the display panel.

[0059] Specifically, such as Figure 2 , Figure 3 As shown, the touch trace 253 is located below the main electrode 271a, so that the touch trace 253 does not need to occupy the space of the opening area, thereby increasing the aperture ratio of the liquid crystal display panel.

[0060] Specifically, from Figures 2 to 5 As can be seen, when setting up touch traces, the touch traces located in the display pixels can be extended directly to the non-display area. Correspondingly, invalid pixels use the touch traces as the input lines for data signals and design other structures to make the space occupied by invalid pixels smaller. To avoid invalid pixels occupying too much space, multiple rows of invalid pixels can be set to test the touch units in the display pixels, resulting in an excessively large bezel of the LCD panel.

[0061] The above embodiments are illustrated by taking the example of the touch trace extending directly into the non-display area. However, the embodiments of this application are not limited to this. For example, the part of the touch trace located in the non-display area can be bent to the left so that the main electrode of the invalid pixel and the main electrode of the display pixel are on the same straight line.

[0062] In one embodiment, such as Figures 2 to 5 As shown, the second metal layer 25 also includes a data line 254. The projection of the data line 254 onto the substrate 21 is on the same straight line as the projection of the main electrode 271a of the invalid pixel 15 onto the substrate 21. By aligning the projection of the data line onto the substrate with the projection of the main electrode of the invalid trace onto the substrate, the invalid pixels can be designed according to the positions of the data line and touch trace when setting display pixels and invalid pixels, thereby reducing the space occupied by invalid pixels and reducing the bezel of the display panel.

[0063] The above embodiments are described by taking the projection of the data line on the substrate and the projection of the main body electrode of the invalid trace on the substrate being located on the same straight line as an example, but the embodiments of the present application are not limited thereto, for example, the interval between the projection of the data line on the substrate and the projection of the touch trace on the substrate, the interval between the projection of the main body electrode of the invalid trace on the substrate and the projection of the touch trace on the substrate.

[0064] In an embodiment, the reflection pattern comprises a substrate layer, a first reflection layer and a second reflection layer, the first reflection layer is arranged between the substrate layer and the pixel electrode layer, and the second reflection layer is arranged between the substrate layer and the substrate. By arranging the reflection layer to comprise the substrate layer, the first reflection layer and the second reflection layer, and arranging the first reflection layer between the substrate layer and the pixel electrode layer, the first reflection layer can reflect the light when the light irradiates the first reflection layer, thereby detecting whether the touch unit is defective. By arranging the second reflection layer between the substrate layer and the substrate, the second reflection layer can reflect the light emitted by the backlight module back when the liquid crystal display panel displays, thereby avoiding light loss.

[0065] Specifically, the materials of the first reflection layer and the second reflection layer can be the same, thereby making the process of preparing the first reflection layer and the second reflection layer simpler.

[0066] In an embodiment, as shown in FIG. 22, the reflection pattern 224 is arranged on the first metal layer 22, and the reflection pattern 224 is arranged to be insulated from the gate 221. By arranging the reflection pattern on the first metal layer, the thickness of the liquid crystal display panel is not increased due to the arrangement of the reflection pattern, and the reflection pattern is arranged to be insulated from the gate, thereby avoiding the influence of the reflection pattern on the transmission signal of the gate. Figure 5 、 Figure 6 Specifically, by arranging the reflection pattern on the first metal layer, the side of the reflection pattern close to the pixel electrode layer can reflect the light, thereby achieving the detection of the touch unit, and the side of the reflection pattern close to the substrate can also reflect the light, thereby avoiding light leakage and light loss.

[0067] Specifically, by arranging the reflection pattern on the first metal layer, the side of the reflection pattern close to the pixel electrode layer can reflect the light, thereby achieving the detection of the touch unit, and the side of the reflection pattern close to the substrate can also reflect the light, thereby avoiding light leakage and light loss.

[0068] The above embodiments are described by taking the reflection pattern arranged on the first metal layer as an example, but the embodiments of the present application are not limited thereto, for example, the liquid crystal display panel also comprises a light shielding layer or a third metal layer forming a capacitor plate, and the reflection pattern can be arranged on the third metal layer or the light shielding layer, thereby avoiding the increase of the thickness of the liquid crystal display panel. For the liquid crystal display panel with free space on the second metal layer, the reflection pattern can also be arranged on the second metal layer.

[0069] In an embodiment, the liquid crystal display panel further comprises a reflective layer, the reflective layer is arranged between the substrate and the first metal layer, and the reflective layer comprises a reflective pattern. By adding the reflective layer in the liquid crystal display panel, the design of the gate layer is not changed, the reflective pattern is formed by the reflective layer, light is reflected, and the touch wire is detected.

[0070] In an embodiment, the projection of the reflective pattern on the substrate has an area greater than the projection of the pixel electrode in the invalid pixel on the substrate. By making the projection of the reflective pattern on the substrate have an area greater than the projection of the pixel electrode in the invalid pixel on the substrate, the reflective pattern can receive light passing through the pixel electrode, and light loss can be avoided to cause errors in the detection result.

[0071] Specifically, when the light passes through the pixel electrode, the light has a certain angle, and part of the light can not be irradiated onto the reflective pattern. In the embodiment of the present application, the projection of the reflective pattern on the substrate has an area greater than the projection of the pixel electrode in the invalid pixel on the substrate. Therefore, after the light passes through the film layers, the light can still be irradiated onto the reflective pattern, and light loss can be avoided to cause errors in the detection result.

[0072] Specifically, the projection of the reflective pattern on the substrate has a width greater than the projection of the pixel electrode in the invalid pixel on the substrate, and the projection of the reflective pattern on the substrate has a length greater than the projection of the pixel electrode in the invalid pixel on the substrate. By making the length and width of the reflective pattern greater than the length and width of the pixel electrode in the invalid pixel, after the light passes through the film layers, the light can still be irradiated onto the reflective pattern, and the reflective pattern can not receive the light to cause errors in the detection result.

[0073] In an embodiment, as shown in Figure 3 , the first metal layer 22 further comprises a scan line 223.

[0074] In an embodiment, as shown in Figure 3 , the liquid crystal display panel further comprises a gate insulating layer 23 and a passivation layer 26. The gate insulating layer 23 is arranged between the first metal layer 22 and the active layer 24, and the passivation layer 26 is arranged between the second metal layer 25 and the pixel electrode layer 27.

[0075] It should be noted that, Figure 3 and Figure 5 the position of the via is shown by a reference numeral 28. The via can be a via of the gate insulating layer, a via of the passivation layer, or a via passing through the gate insulating layer and the passivation layer.

[0076] In an embodiment, as shown in Figure 6As shown, the liquid crystal display panel further comprises a liquid crystal layer 31, a common electrode layer 32, a black matrix layer 33, a color resistance layer 34 and a substrate 35.

[0077] Specifically, the process of detecting the touch unit in the embodiment of the present application is described. In the preparation process of the liquid crystal display panel, the liquid crystal display panel is tested by lighting, but at this time the touch function has not been realized, so the touch unit cannot be detected. The present application sets invalid pixels, so that the touch wires in the touch unit are connected to the source of the invalid pixels, and a reflective pattern is set in the area corresponding to the pixel electrode of the invalid pixel. Then, in the panel test stage, the liquid crystal display panel can be irradiated by introducing an external light source. When the touch unit is normal, the touch wires will input an electrical signal to the source of the invalid pixel, so as to control the deflection of the liquid crystal. The external light will pass through the pixel electrode layer and irradiate the reflective pattern, and the reflective pattern will reflect the light to the outside of the liquid crystal display panel, so as to determine that the touch unit is normal. When the liquid crystal display panel is irradiated and no reflected light is received, it indicates that the touch unit is abnormal, so that each touch unit is detected in the panel test stage.

[0078] Specifically, when the liquid crystal display panel displays normally, since the light source will not be used to irradiate the liquid crystal display panel, the reflective pattern will not reflect the light, and the light emitted by the backlight module will be blocked or reflected back to the backlight module when irradiating the reflective pattern, thereby avoiding light leakage at the invalid pixel and avoiding light loss.

[0079] The above embodiment takes the liquid crystal display panel emitting light from the side of the pixel electrode layer away from the substrate as an example for description, so the reflective pattern close to the side of the pixel electrode can reflect the light for detecting whether the touch unit is normal, and the reflective pattern close to the side of the substrate can reflect the light emitted by the backlight module. For the liquid crystal display panel emitting light from the side of the substrate away from the pixel electrode layer, the reflective pattern can be set on the color film substrate side, the reflective pattern close to the substrate side can reflect the light emitted by the backlight module, and the reflective pattern close to the pixel electrode side can reflect the light for detecting whether the touch unit is normal. Therefore, for the liquid crystal display panel with different light emitting directions, the embodiment of the present application can detect the touch unit in the panel test stage, reflect the light in the display stage, and avoid light leakage.

[0080] Meanwhile, the present application provides a liquid crystal display device, as shown in the figure. Figure 7 The liquid crystal display device comprises the liquid crystal display panel and the backlight module 41 as described in any of the above embodiments.

[0081] According to the above embodiments, it can be known that:

[0082] The embodiment of the present application provides a liquid crystal display panel and a liquid crystal display device; the liquid crystal display panel comprises a display area and a non-display area arranged around the display area, and the liquid crystal display panel comprises a substrate, a first metal layer, an active layer, a second metal layer and a pixel electrode layer, the first metal layer is arranged on one side of the substrate, the first metal layer comprises a gate and a touch electrode, the active layer is arranged on a side of the first metal layer away from the substrate, the second metal layer is arranged on a side of the active layer away from the first metal layer, the second metal layer comprises a source, a drain and a touch trace, the pixel electrode layer is arranged on a side of the second metal layer away from the active layer, and the pixel electrode layer comprises a pixel electrode and a touch signal line, wherein the display area is provided with a display pixel, the non-display area is provided with an invalid pixel, the display pixel comprises the touch electrode, the touch trace and the touch signal line, the invalid pixel comprises the gate, the source, the drain and the pixel electrode, one end of the touch signal line is connected with the touch electrode, the other end of the touch signal line is connected with one end of the touch trace, the other end of the touch trace is connected with the source in the invalid pixel, and the drain in the invalid pixel is connected with the pixel electrode in the invalid pixel; the liquid crystal display panel further comprises a reflection pattern, the reflection pattern is arranged on a side of the pixel electrode close to the second metal layer, a side of the reflection pattern close to the pixel electrode layer is used for reflecting light, and a projection of the reflection pattern on the substrate overlaps with a projection of the pixel electrode in the invalid pixel on the substrate. According to the present application, the invalid pixel is arranged in the non-display area, the touch trace in the display pixel is connected with the source of the transistor in the invalid pixel, and the reflection pattern is arranged in the invalid pixel, so that the projection of the reflection pattern on the substrate overlaps with the projection of the pixel electrode in the invalid pixel on the substrate. Therefore, in the panel test stage, the signal can be input to the touch trace, and the light is input to the liquid crystal display panel, and whether the liquid crystal deflects or not is determined by observing whether the reflection pattern reflects the light, whether the touch trace and the touch signal line input the electric signal to the transistor in the invalid pixel is determined by the deflection result of the liquid crystal, so that whether the touch trace and the touch signal line have defects can be determined, the touch unit is tested in the panel test stage, and the technical problem that the yield of the display device is low due to the failure to detect the touch unit in the panel test stage is avoided.

[0083] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0084] The above has carried on the detailed introduction to the liquid crystal display panel and the liquid crystal display device provided by the embodiment of the application, the principle and implementation of the application are described in the text by applying specific examples, the above embodiment is only used to help understanding the technical scheme of the application and its core idea; The ordinary skilled in the art should understand that: it can still modify the technical scheme recorded by the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the scope of the technical scheme of the embodiments of the application.

Claims

1. A liquid crystal display panel, characterized by comprising: The liquid crystal display panel comprises a display area and a non-display area surrounding the display area, and comprises: a substrate; a first metal layer arranged on one side of the substrate, the first metal layer comprising a gate and a touch electrode; an active layer arranged on a side of the first metal layer away from the substrate; a second metal layer arranged on a side of the active layer away from the first metal layer, the second metal layer comprising a source, a drain and a touch trace; a pixel electrode layer arranged on a side of the second metal layer away from the active layer, the pixel electrode layer comprising a pixel electrode and a touch signal line; wherein the display area is provided with display pixels, the non-display area is provided with invalid pixels, the display pixels comprise the touch electrode, the touch trace and the touch signal line, the invalid pixels comprise the gate, the source, the drain and the pixel electrode, one end of the touch signal line is connected to the touch electrode, the other end of the touch signal line is connected to one end of the touch trace, the other end of the touch trace is connected to the source in the invalid pixel, the drain in the invalid pixel is connected to the pixel electrode in the invalid pixel, the liquid crystal display panel further comprises a reflection pattern, the reflection pattern is arranged on a side of the pixel electrode layer close to the second metal layer, and a projection of the reflection pattern on the substrate overlaps with a projection of the pixel electrode in the invalid pixel on the substrate; the non-display area comprises a first non-display area and a second non-display area, the first non-display area and the second non-display area are arranged opposite to each other with respect to the display area, the first non-display area is provided with a binding terminal, and the invalid pixels are arranged in the second non-display area.

2. The liquid crystal display panel according to claim 1, wherein The display pixels comprise red sub-pixels, green sub-pixels and blue sub-pixels, and the touch trace of at least one of the red sub-pixels, the green sub-pixels and the blue sub-pixels is connected to the source in the invalid pixel.

3. The liquid crystal display panel according to claim 2, wherein The invalid pixels comprise first invalid sub-pixels, second invalid sub-pixels and third invalid sub-pixels, the touch trace in the red sub-pixel is connected to the source in the first invalid sub-pixel, the touch trace in the green sub-pixel is connected to the source in the second invalid sub-pixel, and the touch trace in the blue sub-pixel is connected to the source in the third invalid sub-pixel.

4. The liquid crystal display panel of claim 1, wherein, The pixel electrode comprises a main electrode and a branch electrode, a projection of the touch trace on the substrate overlaps with a projection of the main electrode in the display pixel on the substrate, and a projection of the main electrode in the invalid pixel on the substrate is located between the projections of the touch traces on the substrate.

5. The liquid crystal display panel according to claim 4, wherein The second metal layer further comprises a data line, and a projection of the data line on the substrate is located on the same straight line as a projection of the main electrode of the invalid pixel on the substrate.

6. The liquid crystal display panel of claim 1, wherein, The reflection pattern comprises a substrate layer, a first reflection layer and a second reflection layer, the first reflection layer is arranged between the substrate layer and the pixel electrode layer, and the second reflection layer is arranged between the substrate layer and the substrate.

7. The liquid crystal display panel according to claim 1, wherein The reflection pattern is arranged on the first metal layer, and the reflection pattern is arranged to be insulated from the gate.

8. The liquid crystal display panel of claim 1, wherein, The area of the projection of the reflection pattern on the substrate is greater than the area of the projection of the pixel electrode of the non-effective pixel on the substrate.

9. A liquid crystal display device, characterized by comprising: The liquid crystal display panel and the backlight module comprising the liquid crystal display panel as claimed in any one of claims 1 to 8.

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