Display module and display device

Abstract

According to the display module, a detection area is arranged on the periphery of a touch area, a detection part is arranged in the detection area and surrounds the touch area, the detection part comprises a plurality of detection units, the detection units are connected with a touch chip through a plurality of detection leads, the touch chip comprises a detection module, and the detection part comprises a plurality of detection units. And the detection module is used for identifying the detection units with abnormal capacitance change, recording the position information of the abnormal detection units and uploading the position information to the host system, so that dark spots which are small in size or not formed can be detected, and the detection precision of the dark spots is improved. The invention further provides a display device comprising the display module.

Description

Technical Field

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

[0002] As the size of display panels becomes larger and larger, edge collisions are more likely to occur during the manufacturing and assembly process, forming microcracks. Water vapor invades the display panel along the microcracks, forming growing dark spots (GDS).

[0003] Automated optical inspection (AOI) cameras can be used to take photos and identify these dark spots, but the size of the dark spots that can be identified is limited, and it is unable to intercept dark spots that are smaller or have not yet formed.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Summary of the Invention

[0005] The purpose of the present disclosure is to overcome the problem that the size of dark spots that an automatic optical inspection camera can identify is limited and it is unable to intercept dark spots that are smaller or have not yet formed, and to provide a display module and a display device.

[0006] According to one aspect of the present disclosure, a display module is provided, which has a touch area and a detection area, wherein the detection area is located outside the touch area. The display module also includes a detection part, multiple detection leads and a touch chip. The detection part is arranged in the detection area and is arranged around the touch area. The detection part includes multiple detection units; one end of each detection lead is respectively connected to the detection unit; the touch chip is connected to the other end of each detection lead. The touch chip includes a detection module, which is used to identify the detection unit with abnormal capacitance value change, record the location information of the abnormal detection unit, and upload the location information to the host system.

[0007] In one embodiment of the present disclosure, the display module also includes a touch portion and multiple touch leads. The touch portion is arranged in the touch area. The touch portion includes multiple touch units. One end of the touch lead is connected to the touch unit, and the other end is connected to the touch chip. The setting density of the touch unit is less than the setting density of the detection unit.

[0008] In one embodiment of the present disclosure, the display module further includes a blocking dam, and the blocking dam is disposed between the touch portion and the detection portion.

[0009] In one embodiment of the present disclosure, the blocking dam includes a main body blocking portion, and a material of the main body blocking portion includes an outer silicon oxide or silicon oxynitride insulating layer.

[0010] In one embodiment of the present disclosure, the blocking dam further includes a shielding blocking layer, and the shielding blocking layer is provided at least on one side of the main blocking portion close to the detection portion and the touch portion.

[0011] In one embodiment of the present disclosure, the display module further includes a display substrate, a first touch layer and a second touch layer. The first touch layer is disposed on one side of the display substrate, and the second touch layer is disposed on a side of the display substrate away from the first touch layer.

[0012] In one embodiment of the present disclosure, the detection unit includes a first detection electrode, a second detection electrode and a first bridging portion, the first detection electrode and the second detection electrode are located in the second touch layer, the first bridging portion is located in the first touch layer, the two first detection electrodes are connected to each other, the two second detection electrodes are bridged by the first bridging portion, the detection lead includes a first detection lead and a second detection lead, the first detection electrode is connected to the touch chip through the first detection lead, and the second detection electrode is connected to the touch chip through the second detection lead.

[0013] In one embodiment of the present disclosure, the detection unit includes a first touch electrode, a second touch electrode and a second bridging portion, the first touch electrode and the second touch electrode are located in the second touch layer, the second bridging portion is located in the first touch layer, the two first touch electrodes are connected to each other, and the two second touch electrodes are bridged by the second bridging portion, the touch lead includes a first touch lead and a second touch lead, the first touch electrode is connected to the touch chip through the first touch lead, and the second touch electrode is connected to the touch chip through the second touch lead.

[0014] In one embodiment of the present disclosure, the detection module includes a signal generating unit, a signal conditioning unit, an analog-to-digital conversion unit, a tolerance comparison unit and an abnormal position mapping unit. The signal generating unit is used to periodically generate a detection drive signal and send the detection drive signal to the detection unit through a detection lead; the signal conditioning unit is used to receive a detection sensing signal fed back by the detection unit and convert a coupling current corresponding to the detection sensing signal into an analog voltage signal; the analog-to-digital conversion unit is used to convert the analog voltage signal into a digital voltage signal; the tolerance comparison unit is used to determine whether the current capacitance exceeds the normal capacitance based on the digital voltage signal; the abnormal position mapping unit is used to map the position information of the abnormal detection unit when the current capacitance exceeds the normal capacitance, and upload it to the host system.

[0015] According to another aspect of the present disclosure, a display device is provided, including the display module provided by another aspect of the present disclosure.

[0016] The display module disclosed herein is provided with a detection area on the periphery of the touch area, and the detection area is provided with a detection part, which is arranged around the touch area. The detection part includes multiple detection units, and the detection units are connected to the touch chip through multiple detection leads. The touch chip includes a detection module, and the detection part includes multiple detection units. The detection module is used to identify the detection units with abnormal capacitance changes, and record the position information of the abnormal detection units, and upload the position information to the host system. It can detect dark spots that are small in size or have not yet formed, thereby improving the detection accuracy of dark spots.

[0017] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0019] Figure 1 It is a plan view of a display module involved in an embodiment of the present disclosure.

[0020] Figure 2 This is a schematic diagram of the connection between each detection lead and each detection unit and touch chip, and between each touch lead and each touch unit and touch chip according to the embodiment of the present disclosure.

[0021] Figure 3 This is a connection block diagram of the detection module involved in the embodiment of the present disclosure.

[0022] Figure 4 It is a plan view of a case where a barrier dam is provided between the detection portion and the touch portion according to an embodiment of the present disclosure.

[0023] Figure 5 Schematic diagram of a cross-section of a display panel according to an embodiment of the present disclosure.

[0024] Figure 6 It is a plan view of a case where a barrier dam is provided between the detection portion and the touch portion according to an embodiment of the present disclosure, when the first contour line and the second contour line are interdigitated, and the fourth contour line and the third contour line are interdigitated.

[0025] In the figure: 10-touch area, 20-detection area, 30-peripheral area, 1-display panel, 11-display substrate, 12-touch layer, 1201-touch barrier layer, 1202-first touch layer, 1203-touch isolation layer, 1204-second touch layer, 1205-touch protection layer, 121-detection part, 1211-detection unit, 1212-detection electrode, 1213-first detection electrode, 1214-second detection electrode, 1215-first bridge part, 122-touch part, 1221-touch unit, 1222-touch electrode, 1223-first touch electrode, 1224- Second touch electrode, 1225-second bridging portion, 123-detection lead, 1231-first detection lead, 1232-second detection lead, 124-touch lead, 1241-first touch lead, 1242-second touch lead, 17-blocking dam, 171-main body blocking portion, 172-shielding blocking layer, 2-chip-on-film, 3-control circuit board, 4-touch chip, 41-detection module, 411-signal generating unit, 412-signal conditioning unit, 413-analog-to-digital conversion unit, 414-tolerance comparison unit, 415-storage unit, 416-abnormal position mapping unit. DETAILED DESCRIPTION

[0026] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent identical or similar structures, and thus their detailed descriptions will be omitted. Furthermore, the figures are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0027] Although relative terms such as "upper" and "lower" are used in this specification to describe the relationship of one illustrated component to another, these terms are used herein for convenience only, such as in accordance with the orientation of the illustrations in the accompanying drawings. It will be understood that if the illustrated device were flipped upside down, the component described as "upper" would become the component "lower." When a structure is referred to as "on" another structure, this may mean that the structure is integrally formed with the other structure, that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via the other structure.

[0028] The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express open-ended inclusion and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used only as labels and are not intended to limit the quantity of their objects.

[0029] In recent years, with the continuous advancement of in-vehicle display technology and growing market demand, OLED display modules have become increasingly popular due to their advantages such as high contrast, fast response speed, and wide viewing angle. During the manufacturing and assembly of large-scale OLED display modules, the edges of the display panel 1 are easily damaged by bumps and bumps, resulting in microcracks. These microcracks serve as pathways for moisture to penetrate the internal structure of the display panel 1. Moisture enters the display panel 1 along these microcracks, forming expanding dark spots that seriously affect display quality.

[0030] Traditionally, manual spot checks combined with microscopic examinations are used to detect defects such as dark spots. However, this method is not only inefficient but also lacks accuracy. It can also cause secondary damage to samples during the spot check process, increasing the defect rate. To address these issues, automated optical inspection (AOI) cameras can be used to identify these dark spots. While AOI cameras can more efficiently detect obvious dark spots, they have limited detection capabilities for smaller dark spots or those in their early stages that haven't yet fully formed.

[0031] Based on this, the present disclosure provides a display module. Figures 1 to 6 As shown, the display module has a touch area 10 and a detection area 20, and the detection area 20 is located outside the touch area 10. The display module also includes a detection part 121, multiple detection leads 123 and a touch chip 4. The detection part 121 is arranged in the detection area 20 and is arranged around the touch area 10. The detection part 121 includes multiple detection units 1211; one end of each detection lead 123 is respectively connected to the detection unit 1211; the touch chip 4 is connected to the other end of each detection lead 123, and the touch chip 4 includes a detection module 41. The detection module 41 is used to identify the detection unit 1211 with abnormal capacitance change, record the position information of the abnormal detection unit 1211, and upload the position information to the host system.

[0032] The display module is provided with a detection area 20 on the periphery of the touch area 10, and the detection area 20 is provided with a detection part 121. The detection part 121 is arranged around the touch area 10. The detection part 121 includes multiple detection units 1211. Each detection unit 1211 is connected to the touch chip 4 through each detection lead 123. The touch chip 4 includes a detection module 41. The detection part 121 includes multiple detection units 1211. The detection module 41 is used to identify the detection unit 1211 with abnormal capacitance change, and record the position information of the abnormal detection unit 1211, and upload the position information to the host system. It can detect dark spots that are small in size or have not yet formed, thereby improving the detection accuracy of dark spots.

[0033] The display module involved in the embodiment of the present disclosure is described in detail below with reference to specific embodiments.

[0034] like Figure 1 As shown, the display module may include a display panel 1, a chip-on-film 2 and a control circuit board 3. The display panel 1 has a touch area 10, a blocking dam 17, a detection area 20 and a peripheral area 30. The blocking dam 17 surrounds the periphery of the touch area 10, the detection area 20 surrounds the periphery of the blocking dam 17, the detection area 20 is located on the periphery of the blocking dam 17, and the peripheral area 30 is located on the periphery of the detection area 20. The peripheral area 30 is provided with a binding portion, one end of the chip-on-film 2 is bound to the binding portion, and the other end is bound to the control circuit board 3. The control circuit board 3 is bound with a touch chip 4.

[0035] like Figure 2 and Figure 3 As shown, the touch area 10 is provided with a touch portion 122 and multiple touch leads 124. The touch portion 122 includes multiple touch units 1221 arranged in an array. The touch portion 122 is provided in the touch area 10 and includes multiple touch units 1221. One end of the touch lead 124 is connected to the touch unit 1221, and the other end is connected to the touch chip 4. The detection area 20 is provided with a detection portion 121 and multiple detection leads 123. The detection portion 121 is arranged around the touch area 10 and includes multiple detection units 1211. One end of each detection lead 123 is connected to a detection unit 1211, and the other end is connected to the touch chip 4.

[0036] The touch control chip 4 includes a detection module 41, which may include a signal generating unit 411, a signal conditioning unit 412, an analog-to-digital conversion unit 413, a tolerance comparison unit 414, a storage unit 415, and an abnormal position mapping unit 416. The signal generating unit 411 is used to periodically generate a detection drive signal and send the detection drive signal to the detection unit 1211 through the detection lead 123. The signal conditioning unit 412 is used to receive the detection sensing signal fed back by the detection unit 1211 and convert the coupling current corresponding to the detection sensing signal into an analog voltage signal; the analog-to-digital conversion unit 413 is used to convert the analog voltage signal into a digital voltage signal; the storage unit 415 is used to store the normal capacitance value; the tolerance comparison unit 414 is used to determine whether the current capacitance value exceeds the normal capacitance value based on the digital voltage signal; and the abnormal position mapping unit 416 maps the position information of the abnormal detection unit 1211 when the current capacitance value exceeds the normal capacitance value and uploads it to the host system.

[0037] The detection module 41 will automatically start and perform a capacitance test at a certain interval. The detection module 41 is used to identify the detection unit 1211 with abnormal capacitance changes, record the location information of the abnormal detection unit 1211, and upload the location information to the host system. This automated process reduces the need for manual intervention, improves detection efficiency, and can achieve real-time monitoring to ensure that any new problems can be quickly captured. The detection module 41 also records the location information of the abnormal detection unit 1211, providing accurate data support for subsequent manual re-judgment. Compared with traditional manual sampling methods, this method greatly reduces the possibility of false alarms, and also reduces missed detections due to visual fatigue or other human factors. The dark spot adopts a non-contact detection method, which does not exert additional physical pressure on the display module, thereby effectively avoiding the risk of secondary damage.

[0038] The arrangement density of touch units 1221 is less than the arrangement density of detection units 1211, so that the capacitance change accuracy that can be recognized by detection units 1211 is higher than that of touch units 1221, thereby ensuring higher detection resolution. As shown in the figure, the shape of detection units 1211 can be set to be the same as the shape of touch units 1221, the distance between two adjacent detection units 1211 in the first direction is equal to the distance between two adjacent touch units 1221 in the first direction, and the distance between two adjacent detection units 1211 in the second direction is equal to the distance between two adjacent touch units 1221 in the second direction, and the area of detection units 1211 is smaller than the area of touch units 1221, so that the arrangement density of detection units 1211 is greater than the arrangement density of touch units 1221. As shown in the figure, the shape of the detection unit 1211 can also be set to be the same as the shape and size of the touch unit 1221, the distance between two adjacent detection units 1211 in the first direction is smaller than the distance between two adjacent touch units 1221 in the first direction, and the distance between two adjacent detection units 1211 in the second direction is smaller than the distance between two adjacent touch units 1221 in the second direction.

[0039] like Figure 4 As shown, at least one barrier dam 17 is disposed between the detection portion 121 and the touch portion 122. The barrier dam 17 includes a main barrier portion 171 disposed between the touch portion 122 and the detection portion 121. The main barrier portion 171 prevents signal interference between the detection portion 121 and the touch portion 122, thereby ensuring the accuracy of the detection data. The barrier dam 17 also includes a shielding barrier layer 172, which is disposed at least on one side of the main barrier portion 171 near the detection portion 121 and the touch portion 122. The addition of the shielding barrier layer 172 allows the barrier dam 17 to achieve better shielding. The main barrier portion 171 is made of an outer silicon oxide or silicon oxynitride insulating layer, and the shielding barrier layer 172 is made of metal, which can be aluminum.

[0040] like Figure 5 As shown, the display panel 1 also includes a display substrate 11, a touch barrier layer 1201, a first touch layer 1202, a touch isolation layer 1203, a second touch layer 1204 and a touch protection layer 1205. The touch barrier layer 1201 is arranged on one side of the display substrate 11, the first touch layer 1202 is arranged on the side of the touch barrier layer 1201 away from the display substrate 11, the touch isolation layer 1203 is arranged on the side of the first touch layer 1202 away from the display substrate 11, the second touch layer 1204 is arranged on the side of the touch isolation layer 1203 away from the display substrate 11, and the touch protection layer 1205 is arranged on the side of the second touch layer 1204 away from the display substrate 11.

[0041] like Figures 4 to 6As shown, the detection unit 1211 includes a detection electrode 1212 and a first bridge portion 1215. The detection electrode 1212 includes a first detection electrode 1213 and a second detection electrode 1214. The first detection electrode 1213 and the second detection electrode 1214 are located on the second touch layer 1204. The first bridge portion 1215 is located on the first touch layer 1202. Multiple first detection electrodes 1213 are arranged along a first direction, and multiple second detection electrodes 1214 are arranged along a second direction. Two first detection electrodes 1213 are connected to each other, and two second detection electrodes 1214 are bridged by the first bridge portion 1215. The detection lead 123 includes a first detection lead 1231 and a second detection lead 1232. The first detection electrode 1213 is connected to the touch chip 4 via the first detection lead 1231, and the second detection electrode 1214 is connected to the touch chip 4 via the second detection lead 1232.

[0042] The detection unit 1211 includes a touch electrode 1222 and a second bridging portion 1225. The touch electrode 1222 includes a first touch electrode 1223 and a second touch electrode 1224. The first touch electrode 1223 and the second touch electrode 1224 are located in the second touch layer 1204. The second bridging portion 1225 is located in the first touch layer 1202. Multiple first touch electrodes 1223 are arranged along a first direction, and multiple second touch electrodes 1224 are arranged along a second direction. Two first touch electrodes 1223 are connected to each other, and two second touch electrodes 1224 are bridged by the second bridging portion 1225. The touch lead 124 includes a first touch lead 1241 and a second touch lead 1242. The first touch electrode 1223 is connected to the touch chip 4 through the first touch lead 1241, and the second touch electrode 1224 is connected to the touch chip 4 through the second touch lead 1242.

[0043] like Figure 6 As shown, to ensure the sensitivity of detection unit 1211, the first detection electrode 1213 has a first contour line with alternating concave and convex shapes, and the second detection electrode 1214 has a second contour line with alternating concave and convex shapes. The interdigital coordination between the first and second contour lines can increase the capacitance of detection unit 1211, thereby enhancing the detection accuracy of detection unit 1211. Similarly, the first touch electrode 1223 has a third contour line with alternating concave and convex shapes, and the second touch electrode 1224 has a fourth contour line with alternating concave and convex shapes. The interdigital coordination between the fourth and third contour lines can increase the touch sensing capacity of touch control unit 1221, thereby enhancing the touch sensitivity of touch control unit 1221.

[0044] It should be noted that the first direction is Figure 2 、 Figure 4 and Figure 6 The x direction is shown in the figure, and the second direction is Figure 2 、 Figure 4 and Figure 6 The y direction is shown in FIG.

[0045] The present disclosure also provides a display device, which may include the display module described above. The structure and benefits of the display device can be referenced to the display module, and the specific structure and benefits of the display module can be referenced to the stacked light-emitting device. Therefore, these details are not repeated here.

[0046] It should be noted that, in addition to the display module, the display device also includes other necessary components and components, such as a housing, a circuit board, a power cord, etc. Those skilled in the art can make corresponding supplements based on the specific usage requirements of the display device, which will not be repeated here.

[0047] The display device can be a traditional electronic device, such as a mobile phone, a computer, a television, and a camcorder, or it can be an emerging wearable device, such as a virtual reality device and an augmented reality device, which are not listed here one by one.

[0048] It should be noted that the above embodiments are interconnected and can be combined with each other to form other schemes, and the scheme of the present disclosure is not limited to the schemes described in the above embodiments. After considering the specification and practicing the invention disclosed herein, those skilled in the art will easily think of other embodiments of the present disclosure. This application is intended to cover any variations, uses or adaptive changes of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The description and examples are to be regarded as exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A display module, characterized in that: The display module has a touch area and a detection area, wherein the detection area is located outside the touch area. The display module further includes: a detection portion, disposed in the detection area and surrounding the touch area, the detection portion including a plurality of detection units; a plurality of detection leads, one end of each of the detection leads being connected to the detection unit respectively; A touch chip is connected to the other end of each of the detection leads. The touch chip includes a detection module, which is used to identify the detection unit with abnormal capacitance change, record the position information of the abnormal detection unit, and upload the position information to the host system.

2. The display module according to claim 1, wherein: The display module also includes a touch portion and multiple touch leads. The touch portion is arranged in the touch area. The touch portion includes multiple touch units. One end of the touch lead is connected to the touch unit, and the other end is connected to the touch chip. The setting density of the touch units is less than the setting density of the detection units.

3. The display module according to claim 2, wherein: The display module further includes a blocking dam, and the blocking dam is disposed between the touch portion and the detection portion.

4. The display module according to claim 3, wherein: The blocking dam includes a main body blocking portion, and a material of the main body blocking portion includes an outer silicon oxide or silicon oxynitride insulating layer.

5. The display module according to claim 4, wherein: The blocking dam further includes a shielding blocking layer, and the shielding blocking layer is at least respectively provided on one side of the main blocking portion close to the detection portion and the touch portion.

6. The display module according to claim 2, wherein: The display module further includes a display substrate, a first touch layer and a second touch layer. The first touch layer is disposed on one side of the display substrate, and the second touch layer is disposed on a side of the display substrate away from the first touch layer.

7. The display module according to claim 6, wherein: The detection unit includes a first detection electrode, a second detection electrode and a first bridge portion, the first detection electrode and the second detection electrode are located in the second touch layer, the first bridge portion is located in the first touch layer, the two first detection electrodes are connected to each other, and the two second detection electrodes are bridged by the first bridge portion. The detection lead includes a first detection lead and a second detection lead, the first detection electrode is connected to the touch chip through the first detection lead, and the second detection electrode is connected to the touch chip through the second detection lead.

8. The display module according to claim 7, wherein: The detection unit includes a first touch electrode, a second touch electrode and a second bridge portion, the first touch electrode and the second touch electrode are located in the second touch layer, the second bridge portion is located in the first touch layer, the two first touch electrodes are connected to each other, and the two second touch electrodes are bridged by the second bridge portion, the touch lead includes a first touch lead and a second touch lead, the first touch electrode is connected to the touch chip through the first touch lead, and the second touch electrode is connected to the touch chip through the second touch lead.

9. The display module according to claim 1, wherein: The detection module includes: A signal generating unit, configured to periodically generate a detection drive signal and send the detection drive signal to the detection unit via a detection lead; a signal conditioning unit, configured to receive the detection sensing signal fed back by the detection unit and convert the coupling current corresponding to the detection sensing signal into an analog voltage signal; an analog-to-digital conversion unit, configured to convert the analog voltage signal into a digital voltage signal; a tolerance comparison unit, configured to determine whether a current capacitance value exceeds a normal capacitance value based on the digital voltage signal; The abnormal position mapping unit is used to map the position information of the abnormal detection unit when the current capacity value exceeds the normal capacity value, and upload it to the host system.

10. A display device, characterized in that: A display module comprising any one of claims 1 to 9.

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