CN112559262A - Display panel, detection method and display device thereof - Google Patents
Display panel, detection method and display device thereof Download PDFInfo
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- CN112559262A CN112559262A CN202011392223.9A CN202011392223A CN112559262A CN 112559262 A CN112559262 A CN 112559262A CN 202011392223 A CN202011392223 A CN 202011392223A CN 112559262 A CN112559262 A CN 112559262A
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- display panel
- layer
- circuit board
- touch
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
- G06F11/2205—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing using arrangements specific to the hardware being tested
- G06F11/2221—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing using arrangements specific to the hardware being tested to test input/output devices or peripheral units
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
- G06F11/2273—Test methods
Abstract
The invention provides a display panel, a detection method and a display device, wherein the display panel comprises a substrate, and the display panel also comprises: the touch control film layer is arranged on one side of the substrate and comprises a touch control electrode positioned in a display area of the substrate and at least one resistor positioned in a non-display area of the substrate, and each resistor comprises a first connecting end and a second connecting end; the flexible circuit board comprises a chip and at least one group of conducting pads, the chip comprises a signal input pin and at least one signal output pin, each group of conducting pads comprises a first conducting pad and a second conducting pad, the first conducting pads are connected with the corresponding signal output pins through first wires, and the second conducting pads are connected with the signal input pins through second wires; the flexible circuit board is laminated on the portion of the touch control film layer located in the non-display area, the first conductive pad is electrically connected with the first connecting end, and the second connecting end is electrically connected with the second connecting end.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to a display panel, a detection method and a display device thereof.
Background
In recent years, with the gradual development of touch technologies, display panels of devices such as smart phones, smart tablets, smart wearable devices and the like generally have a touch function, and the touch panels can be classified into four types, namely resistive type, capacitive type, optical type and sound wave type, according to different sensing technologies, wherein the capacitive type touch panel determines a touch point through a reference capacitance change caused by sensing capacitance generated between a detection electrode and a human body from the capacitive type touch technology or the mutual capacitive type touch technology. When the human body does not touch the touch panel, the state of each electrode is taken as a reference value. When a human body contacts the touch panel, a parasitic capacitance is generated between the human body and the touch panel, which causes a change in the total capacitance of the touch panel, and thus a change in the current or voltage in the touch panel. And detecting the voltage or current variation of the electrodes at different positions of the touch panel so as to calculate the contact position.
With the rise of the full-screen of the mobile phone, the demand for a large-size full-screen touch display panel is increasing. In the trend of full-screen design, the design space of peripheral devices on an FPC (flexible circuit board) for transmitting signals with a touch film layer of a display panel is getting smaller. In addition, taking a peripheral device as an example, the peripheral device includes a signal output pin and a signal input pin, and in order to ensure the level stability between the signal output pin and the signal input pin, a resistance element is often required to be additionally arranged between the signal output pin and the signal input pin. At present, the resistance of the stable level is limited by the space of the main circuit board of the display panel, and if the resistance is arranged on the FPC, the area of the FPC is increased and the cost is increased.
In view of the above, a new display panel is needed, which can stabilize the level between the signal output pin and the signal input pin without increasing the area and cost of the FPC.
Disclosure of Invention
The invention aims to provide a display panel and a display device thereof, which solve the problems of increased peripheral devices, enlarged area and increased cost on an FPC (flexible printed circuit) caused by the arrangement of the conventional resistor element on the FPC by arranging the resistor element for stabilizing the level between a signal output pin and a signal input pin on a touch film layer.
In order to solve the above problems, a technical solution of the present invention provides a display panel, including a substrate, where the substrate includes a display area and a non-display area, and the display panel further includes: the touch control film layer is arranged on one side of the substrate and comprises a touch control electrode positioned in the display area and at least one resistor positioned in the non-display area, and each resistor comprises a first connecting end and a second connecting end; the flexible circuit board comprises a chip and at least one group of conducting pads, the chip comprises a signal input pin and at least one signal output pin, each group of conducting pads comprises a first conducting pad and a second conducting pad, the first conducting pad is connected with the corresponding signal output pin through a first lead, and the second conducting pad is connected with the signal input pin through a second lead; the flexible circuit board is laminated on the portion of the touch film layer located in the non-display area, the first conductive pad is electrically connected with the first connection end, and the second conductive pad is electrically connected with the second connection end.
As an optional technical solution, the touch panel further includes a capping layer, and the touch film layer is disposed on a surface of the capping layer, the surface being far away from the substrate.
As an optional technical solution, the touch panel further includes a flat layer, the capping layer is an organic thin film encapsulation layer, the flat layer is disposed on a surface of the organic thin film encapsulation layer on a side far away from the substrate, and the touch film layer is disposed on a surface of the flat layer on a side far away from the substrate.
As an optional technical solution, the electronic device further includes a conductive adhesive layer, where the conductive adhesive layer is disposed between each group of the conductive pads and the corresponding resistor, so that the first conductive pad and the first connection terminal are electrically conducted, and the second conductive pad and the second connection terminal are electrically conducted.
As an optional technical solution, the conductive adhesive layer is an anisotropic conductive adhesive.
As an optional technical solution, the resistor includes a conductive wire bent back and forth, and the first connection end and the second connection end are respectively located at two ends of the conductive wire.
As an optional technical solution, the first connection end and the second connection end are arranged side by side.
As an optional technical solution, the material of the conductive wire is one or a combination of at least one selected from indium tin oxide, molybdenum, titanium, aluminum, silver, and nano silver wires.
A detection method of a display panel, the detection method comprising:
providing a display panel as described above;
pressing each group of conducting pads of the flexible circuit board to the first connecting end and the second connecting end of the corresponding resistor of the touch control film layer in the non-display area; and
detecting whether the corresponding resistor is in a conducting state;
if the touch screen is in a conducting state, the flexible circuit board and the touch film layer are effectively pressed; and if the flexible circuit board is in a non-conduction state, the flexible circuit board and the touch control film layer are abnormally pressed.
The invention also provides a display device which comprises the display panel.
Compared with the prior art, the invention provides a display panel, a detection method and a display device thereof, wherein the display panel comprises a substrate with a display area and a non-display area and a touch control film layer formed on one side of the substrate, resistors for stabilizing a signal output pin and a signal input pin of a chip are arranged on the part of the touch control film layer positioned in the non-display area, on the premise of not influencing the touch control film layer, the resistors are prevented from being arranged on a flexible circuit board or a main circuit board, the design space of the flexible circuit board and the main circuit board is saved, and the manufacturing cost of the display panel is reduced. In addition, the pressing effectiveness of the flexible circuit board is judged by detecting the on-off of the resistor, so that the design of a detection conducting pad additionally arranged on the existing circuit board is replaced, and a similar detection effect is realized.
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic view of a display panel according to an embodiment of the invention.
Fig. 2 is a partially enlarged schematic view of the display panel in fig. 1.
Fig. 3 is a partially enlarged schematic view of the flexible circuit board of fig. 2 attached with the conductive adhesive layer.
Fig. 4 is a schematic structural diagram of a resistor on a touch film layer according to another embodiment of the invention.
Fig. 5 is a schematic structural diagram of a resistor on a touch film layer according to another embodiment of the invention.
Fig. 6 is a flowchart illustrating a method for detecting a display panel according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 and fig. 2, the present invention provides a display panel 100, which includes a substrate 10, the substrate 10 includes a display area and a non-display area, wherein the display panel 100 further includes a touch film layer and a flexible circuit board 20, the touch film layer includes a touch electrode located in the display area and at least one resistor 13 located in the non-display area, each resistor 13 includes a first connection end 131 and a second connection end 132; the flexible circuit board 20 comprises a chip 30 and at least one set of conductive pads, wherein the chip 30 comprises a signal input pin 31 and at least one signal output pin 32, each set of conductive pads comprises a first conductive pad 21 and a second conductive pad 22, the first conductive pad 21 is connected with the corresponding signal output pin 32 through a first wire 41, and the second conductive pad 22 is connected with the signal input pin 31 through a second wire 42; when the flexible circuit board 20 is laminated on the portion of the touch film layer located in the non-display region, the first conductive pad 21 is electrically connected to the first connection terminal 131, and the second conductive pad 22 is electrically connected to the second connection terminal 132.
In the invention, the resistor 13 for balancing the level between the signal output pin 32 and the signal input pin 31 is formed in the touch film layer, so that the resistor is prevented from being arranged on a main circuit board or an FPC of the display panel, the space of the main circuit board or the FPC is saved, and the manufacturing cost of the display panel is not increased.
In a preferred embodiment, the resistors can be formed simultaneously with the process of routing the touch electrodes and/or the electrodes, and the process cost is not increased.
In addition, the flexible circuit board 20 includes a plurality of other conductive pads (not shown), the portion of the touch film layer located in the non-display region includes a plurality of corresponding connection terminals, the other ends of the connection terminals are connected to the signal lines led out from the touch electrodes, and when the flexible circuit board 20 is pressed on the portion of the touch film layer located in the non-display region, the plurality of other conductive pads on the flexible circuit board 20 are electrically connected to the plurality of corresponding connection terminals.
In a preferred embodiment, the display panel 100 is, for example, an OLED touch display panel, and further includes an array control layer (not shown) and an OLED device layer (not shown) stacked one above the other, where the array control layer is disposed near a surface of one side of the substrate 10, and the OLED device layer is stacked above the array control circuit layer.
The array control layer comprises a plurality of inorganic insulating layers, a plurality of organic layers arranged on the plurality of inorganic insulating layers, a plurality of metal layers arranged between the organic layers and the inorganic insulating layers, a semiconductor layer arranged between the plurality of inorganic insulating layers and a pixel electrode layer arranged between the plurality of organic layers. The multi-layer inorganic insulating layer includes, for example, a buffer layer, a gate insulating layer, and an interlayer insulating layer; the multi-layer organic layer comprises an organic planarization layer, a pixel definition layer and a spacer layer; the multilayer metal layer comprises a grid metal layer and a source drain metal layer; the multiple metal layers and the semiconductor layer jointly form a plurality of TFT devices and metal wiring.
In addition, the pixel electrode layer is arranged on the organic flat layer, and the pixel definition layer is arranged on the pixel electrode layer and the flat layer and encloses a plurality of pixel openings on the pixel electrode layer. The spacer layer is arranged on the pixel definition layer and used for supporting the mask plate when the OLED device layer is formed through evaporation. The OLED device layer comprises a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer and a cathode layer.
The capping layer is, for example, a thin film encapsulation layer, and includes a first inorganic barrier layer, an organic buffer layer, and a second inorganic barrier layer, which are stacked.
The touch film layer is disposed on the surface of the capping layer away from the substrate 10, and preferably, a planarization layer such as SiN is formed on the surface of the capping layer away from the substrate 103A flat layer, and then SiN3And manufacturing a touch control film layer on the flat layer.
In this embodiment, the touch film layer includes a touch electrode, a peripheral trace (not shown) and a resistor 13, the touch electrode includes a first electrode 11 and a second electrode 12, the first electrode 11 and the second electrode 12 are respectively formed in the display region of the substrate 10, and the peripheral trace and the resistor 13 are respectively located in the non-display region of the substrate 10.
In a preferred embodiment, the substrate 10 may be a rigid substrate or a flexible substrate.
As shown in fig. 3, the display panel 100 further includes a conductive adhesive layer 50, and after the flexible circuit board 20 and the portion of the touch film layer located in the display area are laminated, the conductive adhesive layer 50 can conduct two connection terminals of each group of conductive pads and the corresponding resistor 13. That is, the conductive paste layer 50 makes the first conductive pad 21 and the first connection terminal 131 electrically communicated and the second conductive pad 22 and the second connection terminal 132 electrically communicated.
At this time, the electric signal output from one signal output pin 32 of the chip 30 is stabilized by the resistor 13, and then enters the chip 30 through the signal input pin 31, so as to ensure the stability of the signal entering the chip 30.
In a preferred embodiment, the signal input pin 31 is a voltage input pin; the at least one signal output PIN 32 includes a RESET PIN (RESET PIN), an interrupt PIN (INT PIN), a data line PIN (SDA PIN), and a clock signal line PIN (SCL PIN), etc.
It should be noted that, when the signal output PIN 32 is a RESET PIN (RESET PIN), the first conductive pad electrically connected to the RESET PIN is electrically connected to the first connection end of the corresponding resistor, and the signal output by the RESET PIN is transmitted from the first conductive pad to the first connection end of the corresponding resistor, and then transmitted from the second connection end of the corresponding resistor to the voltage input PIN 31 of the chip 30.
Whether the pressing between the resistor and the conducting pad is effective pressing or not can be judged by detecting the on-off of the corresponding resistor. The effective pressing means that good electrical conduction is formed between the reset pin and the signal input pin, and the resistor can pull up and stabilize the voltage output from the reset pin and then input the voltage into the signal input pin.
Specifically, the method comprises the following steps:
pressing a group of conducting pads electrically connected with the reset pin and the voltage signal input end on the flexible circuit board 20 to the first connecting end and the second connecting end of the corresponding resistor on the touch control film layer;
detecting whether the corresponding resistor is conducted;
if the corresponding resistor is detected to be conducted, the pressing state between the conductive pad and the first connecting end and the second connecting end of the resistor is effective pressing, the resistor inputs a signal output from the reset pin into the voltage input pin after the signal is pulled up and stabilized, and at the moment, the touch control film layer can normally detect the generated touch control operation.
If the corresponding resistor is detected to be non-conductive, the pressing state between the conductive pad and the first connection end and the second connection end of the resistor is abnormal pressing, the resistor cannot pull up and stabilize the signal output from the reset pin, and at this time, the program of the chip 30 is reported to be wrong.
In this embodiment, whether the resistor arranged in the non-display area of the touch film layer is turned on or not can be used for detecting whether the lamination between the flexible printed circuit board and the touch film layer is effective or not, so that the current extra detection conductive pad specially used for detecting whether the lamination between the touch film layer and the flexible printed circuit board is effective or not can be replaced, and the same detection effect can be realized.
In a preferred embodiment, the conductive adhesive layer 50 is, for example, an anisotropic conductive adhesive, and can be pre-attached to one side of the flexible circuit board 20 to cover at least one set of conductive pads. In other embodiments of the present invention, the conductive adhesive layer is, for example, an anisotropic conductive adhesive, and may also be pre-attached to the touch control film layer to cover the first connection terminal and the second connection terminal of the at least one resistor. In other words, when the conductive adhesive layer is an anisotropic conductive adhesive, the conductive adhesive layer can be pre-attached to cover at least one of the group of conductive pads on the flexible circuit board and the at least one resistor on the touch control film layer.
As shown in fig. 2, the resistor 13 includes a conductive wire bent back and forth, and the first connection 131 and the second connection 132 are respectively located at two ends of the conductive wire. Preferably, the first connecting end 131 and the second connecting end 132 are arranged side by side, and the side by side arrangement may be a horizontal side by side arrangement. In other embodiments of the present invention, the two or more than two of the above-mentioned components may be arranged vertically side by side.
When a plurality of resistors are disposed on the touch control film layer, the first connection terminal 131 and the second connection terminal 132 are disposed side by side, which is convenient for the arrangement design of the corresponding conductive pads on the flexible circuit board 20, and on the other hand, can save the space occupied by the first connection terminal 131 and the second connection terminal 132 on the touch control film layer.
As shown in fig. 2, the conductive line is bent substantially in a U-shape at a portion between the first connection terminal 131 and the second connection terminal 132, and the conductive line is bent and arranged to obtain a resistance of a desired resistance value by extending the length of the conductive line.
In a preferred embodiment, the resistance of the resistor 13 is, for example, 10k Ω.
As shown in fig. 4, in another embodiment of the present invention, the conductive line of the resistor 14 is bent in a zigzag shape at a middle portion between the first connection terminal 141 and the second connection terminal 142.
In a further embodiment of the invention, as shown in fig. 5, the conductive line of the resistor 15 is bent in a wave shape in the middle between the first connection terminal 151 and the second connection terminal 152.
That is, the invention is not particularly limited to the specific shape of the conductive line forming the resistor bent at the middle between the first connection end and the second connection end, and the conductive line can be designed according to the actual free area of the touch film layer in the non-display area and the target resistance of the resistor.
In a preferred embodiment of the present invention, the conductive line is made of a material selected from one or a combination of at least one of indium tin oxide, molybdenum, titanium, aluminum, silver, and silver nanowires.
As shown in fig. 6, the present invention further provides a method for detecting a display panel.
The above-described detection method will be described below in conjunction with the display panel 100 shown in fig. 1 to 2.
S1, providing the display panel 100 as described above;
s2, pressing the first conductive pad 21 and the second conductive pad 22 of each set of conductive pads of the flexible circuit board 20 to the first connection end 131 and the second connection end 132 of the corresponding resistor 13 in the non-display region;
s3, detecting whether the corresponding one of the resistors 13 is in a conducting state;
if the touch screen is in the on state, the flexible circuit board 20 and the touch film layer are effectively pressed together S4; s5, if the flexible printed circuit board 20 and the touch film are not in the conductive state, the chip 30 is pressed abnormally and the program is reported incorrectly.
The present invention also provides a display device including the display panel 100 as described above.
In summary, the present invention provides a display panel, a detection method and a display device thereof, wherein the display panel includes a substrate having a display area and a non-display area, and a touch film layer formed on one side of the substrate, and resistors for stabilizing signal output pins and signal input pins of a chip are disposed on a portion of the touch film layer located in the non-display area, so as to avoid disposing the resistors on a flexible circuit board or a main circuit board without affecting the touch film layer, thereby saving design space of the flexible circuit board and the main circuit board, and reducing manufacturing cost of the display panel. In addition, the pressing effectiveness of the flexible circuit board is judged by detecting the on-off of the resistor, so that the design of a detection conducting pad additionally arranged on the existing circuit board is replaced, and a similar detection effect is realized.
The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. Furthermore, the technical features mentioned in the different embodiments of the present invention described above may be combined with each other as long as they do not conflict with each other. It is to be noted that the present invention may take various other embodiments, and that various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A display panel comprising a substrate including a display region and a non-display region, the display panel further comprising:
the touch control film layer is arranged on one side of the substrate and comprises a touch control electrode positioned in the display area and at least one resistor positioned in the non-display area, and each resistor comprises a first connecting end and a second connecting end; and
the flexible circuit board comprises a chip and at least one group of conducting pads, the chip comprises a signal input pin and at least one signal output pin, each group of conducting pads comprises a first conducting pad and a second conducting pad, the first conducting pad is connected with the corresponding signal output pin through a first lead, and the second conducting pad is connected with the signal input pin through a second lead;
the flexible circuit board is laminated on the portion, located in the non-display area, of the touch film layer, the first conductive pad is electrically connected with the first connection end, and the second connection end is electrically connected with the second connection end.
2. The display panel of claim 1, further comprising a capping layer, wherein the touch film layer is disposed on a surface of the capping layer away from the substrate.
3. The display panel according to claim 2, further comprising a planarization layer, wherein the capping layer is a thin film encapsulation layer, the planarization layer is disposed on a surface of the thin film encapsulation layer on a side away from the substrate, and the touch film layer is disposed on a surface of the planarization layer on a side away from the substrate.
4. The display panel according to claim 1, further comprising a conductive adhesive layer disposed between each group of the conductive pads and the corresponding resistor, such that the first conductive pad is electrically connected to the first connection terminal, and the second conductive pad is electrically connected to the second connection terminal.
5. The display panel according to claim 1, wherein the conductive adhesive layer is an anisotropic conductive adhesive.
6. The display panel according to claim 1, wherein the resistor comprises a conductive wire bent back and forth, and the first connection terminal and the second connection terminal are respectively located at two ends of the conductive wire.
7. The display panel of claim 6, wherein the first connection end and the second connection end are arranged side by side.
8. The display panel according to claim 6, wherein the conductive line is made of one or a combination of at least one selected from indium tin oxide, molybdenum, titanium, aluminum, silver, and silver nanowires.
9. A detection method of a display panel is characterized by comprising the following steps:
providing a display panel according to any one of claims 1-8;
pressing each group of conducting pads of the flexible circuit board to the first connecting end and the second connecting end of the corresponding resistor of the touch control film layer in the non-display area;
detecting whether the corresponding resistor is in a conducting state;
if the touch screen is in a conducting state, the flexible circuit board and the touch film layer are effectively pressed; and if the flexible circuit board is in a non-conduction state, the flexible circuit board and the touch control film layer are abnormally pressed.
10. A display device characterized in that it comprises a display panel according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011392223.9A CN112559262B (en) | 2020-12-03 | 2020-12-03 | Display panel, detection method and display device thereof |
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|---|---|---|---|
| CN202011392223.9A CN112559262B (en) | 2020-12-03 | 2020-12-03 | Display panel, detection method and display device thereof |
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| CN112559262A true CN112559262A (en) | 2021-03-26 |
| CN112559262B CN112559262B (en) | 2022-09-20 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170153757A1 (en) * | 2015-08-19 | 2017-06-01 | Shenzhen China Star Optoelectronics Technology Co. Ltd. | Touch Panel Display Device And Array Substrate |
| CN110288929A (en) * | 2018-03-19 | 2019-09-27 | 三星显示有限公司 | Flat-panel monitor |
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2020
- 2020-12-03 CN CN202011392223.9A patent/CN112559262B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170153757A1 (en) * | 2015-08-19 | 2017-06-01 | Shenzhen China Star Optoelectronics Technology Co. Ltd. | Touch Panel Display Device And Array Substrate |
| CN110288929A (en) * | 2018-03-19 | 2019-09-27 | 三星显示有限公司 | Flat-panel monitor |
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| CN112559262B (en) | 2022-09-20 |
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