CN112783374A - Touch display panel with ultra-thick cover plate and test method thereof - Google Patents
Touch display panel with ultra-thick cover plate and test method thereof Download PDFInfo
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- CN112783374A CN112783374A CN202110176001.1A CN202110176001A CN112783374A CN 112783374 A CN112783374 A CN 112783374A CN 202110176001 A CN202110176001 A CN 202110176001A CN 112783374 A CN112783374 A CN 112783374A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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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
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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Abstract
The utility model relates to a capacitive touch screen's field especially relates to super thick apron touch-control display panel and test method thereof, a super thick apron touch-control display panel, including glass apron and LCD display screen, glass apron thickness range is 4 ~ 5mm, and one side fixedly connected with cover the brilliant film that glass apron is close to the LCD display screen for sensing user's touch screen action and producing the analog signal of touch screen action, cover the brilliant film and link to each other with the LCD display screen, be provided with first connector on the brilliant film, first connector is connected with cover the brilliant film electricity, the printing has control circuit on the first connector, and control circuit is including the touch control chip who is used for gathering the analog signal of touch screen action, and the touch control chip is connected with the touch-sensitive circuit who is used for increasing super thick apron touch-control display panel sensitivity. The method and the device have the effect that the CTP can keep corresponding touch sensitivity under the condition of reaching the steel ball free falling body experiment standard.
Description
Technical Field
The application relates to the field of capacitive touch screens, in particular to a touch display panel with an ultra-thick cover plate and a test method thereof.
Background
The touch panel CTP is a touch display screen that works by using human body current induction. At present, when the CTP is applied to a part of special environments, the protection capability of the CTP needs to reach the experimental standard of the steel ball free falling body experiment, and the content of the steel ball free falling body experiment is as follows: the 5kg steel ball falls freely at a height of 20cm, and the CTP should not crack or be functionally damaged. The thickness of a common touch screen is 1mm or less, and the common touch screen cannot meet the experimental standard of a steel ball free fall experiment, so that a thicker cover plate needs to be added on a CTP in the using process of the CTP to improve the protection capability of the CTP, the protective capability reaches the experimental standard of the steel ball free fall experiment, and the sensitivity of the CTP is influenced when the cover plate is too thick.
Disclosure of Invention
In order to enable CTP to keep corresponding touch sensitivity under the condition that CTP reaches the experimental standard of steel ball free falling body, the application provides a touch display panel with an ultra-thick cover plate and a test method thereof.
In a first aspect, the present application provides a touch display panel with an ultra-thick cover plate, which adopts the following technical scheme:
the utility model provides a touch-control display panel of super thick apron, includes glass apron and LCD display screen, glass apron thickness range is 4 ~ 5mm, and one side fixedly connected with cover the brilliant film that glass apron is close to the LCD display screen for sensing user's touch screen action and producing the analog signal of touch screen action, cover the brilliant film and link to each other with the LCD display screen, be provided with first connector on the cover brilliant film, first connector is connected with cover the brilliant film electricity, the printing has control circuit on the first connector, and control circuit is including the touch control chip who is used for gathering the analog signal of touch screen action, and touch control chip is connected with the touch-sensitive circuit that is used for increasing touch-control display panel sensitivity of super thick apron.
By adopting the technical scheme, when a user operates on the touch display panel with the ultra-thick cover plate, the analog signal of the touch action of the user is generated on the chip-on-film, the analog signal is acquired through the high-precision touch control chip, the analog signal of the touch action of the user is acquired, meanwhile, the sensitivity of the touch display panel with the ultra-thick cover plate can be adjusted through the touch sensing circuit, and the touch display panel with the ultra-thick cover plate can keep corresponding touch sensitivity under the condition that the touch display panel with the ultra-thick cover plate meets the experimental standard of free falling bodies of steel balls.
Optionally, the model of the touch control chip is MXT 336U.
By adopting the technical scheme, the touch control chip with the model of MXT336U has the characteristic of high precision, mutual capacitance measurement can be realized through self capacitance, and then the precision of touch induction is improved.
Optionally, the touch control chip includes an internal register module, configured to set a response threshold of an analog signal of a touch screen action.
By adopting the technical scheme, the response threshold value of the analog signal of the touch screen action is set by using the internal register module, and the analog signal is processed when the analog signal of the touch screen action exceeds the threshold value range, so that the interference on the touch display panel with the ultra-thick cover plate caused by other abnormal touches such as air disturbance is reduced.
Optionally, one surface of the chip on film, which is far away from the glass cover plate, is fixedly connected with transparent ITO glass, and one surface of the transparent ITO glass, which is far away from the chip on film, is connected with the LCD display screen.
By adopting the technical scheme, the transparent ITO glass layer is additionally arranged between the flip chip film and the LCD display screen, so that the noise blocking function is realized, and the radiation interference from the LCD display screen is reduced.
Optionally, one side of the first connector, on which the control circuit is not printed, is fixedly connected with a reinforcing sheet for increasing the thickness of the first connector, and the position of the reinforcing sheet corresponds to the position of the control circuit on the first connector.
Through adopting above-mentioned technical scheme, set up the reinforcement piece on the connector with the corresponding one side of weld part, increased the thickness of weld part position connector, when the condition of buckling appeared in the connector, the degree of buckling of connector can be alleviated to the reinforcement piece, reduces the possibility that components and parts drop on the weld part.
Optionally, the optimal thickness of the glass cover plate is 4 mm.
In a second aspect, the present application provides a method for testing a touch display panel with an ultra-thick cover plate, which adopts the following technical scheme:
a test method of a touch display panel with an ultra-thick cover plate comprises the following steps:
connecting the touch display panel with the ultra-thick cover plate with a computer and opening a test program on the computer;
testing whether the touch function of the touch display panel of the ultra-thick cover plate is normal or not by using a test program;
if not, detecting a connection error;
if so, testing the sensitivity of the touch display panel with the ultra-thick cover plate, and judging whether the sensitivity is normal or not;
if the sensitivity is lower than the standard value in the test program, increasing the capacitance value of the matching capacitor in the touch sensing circuit;
if the sensitivity is higher than the standard value in the test program, the threshold value set in the internal register module is increased;
and if the sensitivity is normal, completing the test.
By adopting the technical scheme, the touch display panel with the ultra-thick cover plate is connected with a computer, the touch function and the touch sensitivity of the touch display panel with the ultra-thick cover plate are tested by using the test program on the computer, and the display interface of the test program can directly display the sensitivity state of the current touch display panel with the ultra-thick cover plate, so that the touch display panel with the ultra-thick cover plate has the characteristic of simple operation.
Optionally, the detecting the connection error specifically includes:
and detecting whether the first connector and the test board have poor contact or wrong connection line sequence.
In summary, the present application includes at least one of the following beneficial technical effects:
1. when a user operates on the touch display panel with the ultra-thick cover plate, an analog signal of a touch action of the user is generated on the chip-on-film, the analog signal is collected through the high-precision touch control chip to obtain the touch action of the user, and meanwhile, the sensitivity of the touch display panel with the ultra-thick cover plate can be adjusted through the touch sensing circuit, so that the touch display panel with the ultra-thick cover plate can keep corresponding touch sensitivity under the condition that the touch display panel with the ultra-thick cover plate meets the experimental standard of free falling bodies of steel balls;
2. the touch control chip with the model of MXT336U has the characteristic of high precision, and mutual capacitance measurement can be realized through self-capacitance, so that the precision of touch induction is improved;
3. the touch display panel with the ultra-thick cover plate is connected with a computer, a test program on the computer is used for testing the touch function and the touch sensitivity of the touch display panel with the ultra-thick cover plate, and the display interface of the test program can directly display the sensitivity state of the touch display panel with the ultra-thick cover plate at present, so that the touch display panel with the ultra-thick cover plate has the characteristic of simplicity in operation.
Drawings
Fig. 1 is a front view of a touch display panel with an ultra-thick cover plate according to an embodiment of the present disclosure.
Fig. 2 is a side view of an ultra-thick cover touch display panel according to an embodiment of the present disclosure.
Fig. 3 is an enlarged view at a in fig. 2.
Fig. 4 is an enlarged view at B in fig. 2.
Fig. 5 is a block diagram of a circuit structure of a touch display panel with an ultra-thick cover plate according to an embodiment of the present disclosure.
Fig. 6 is a flowchart illustrating a method for testing a touch display panel with an ultra-thick cover plate according to an embodiment of the present disclosure.
Description of reference numerals: 1. a glass cover plate; 2. a chip on film; 21. a first connector; 211. welding the part; 212. a reinforcing sheet; 3. transparent ITO glass; 4. an LCD display screen; 41. a second connector; 5. a control circuit; 51. a touch control chip; 52. a touch sensing circuit; 511. an internal register module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below with reference to fig. 1-5 and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The embodiment of the application discloses a touch display panel with an ultra-thick cover plate. Referring to fig. 1, the ultra-thick cover plate touch display panel includes a glass cover plate 1, and the thickness of the glass cover plate 1 is 4 mm. In the related art, the thickness of the glass cover plate 1 is generally 1mm or less, and the glass cover plate 1 with the thickness of 4-5 mm is adopted in the embodiment of the application, so that the protection strength of the touch display panel with the ultra-thick cover plate can be increased, the touch display panel with the ultra-thick cover plate can reach the experimental standard of the steel ball free fall experiment, and the optimal thickness value of the glass cover plate is 4 mm.
Referring to fig. 2 and 3, a cover glass 2 is fixedly connected to one surface of the glass cover plate 1, and a plurality of sensing electrode units are disposed on the cover glass 2 and used for sensing touch screen actions of a user. The one side of the chip on film 2, which is far away from the glass cover plate 1, is fixedly connected with transparent ITO glass 3, and the transparent ITO glass 3 is used for blocking noise interference and improving the anti-interference capability of the touch display panel with the ultra-thick cover plate. And an LCD display screen 4 is bonded on one surface of the transparent ITO glass 3 far away from the chip on film 2 through a foam adhesive tape.
The chip on film 2 is provided with a first connector 21, the LCD 4 is provided with a second connector 41, and the first connector 21 is electrically connected with the second connector 41. The first connector 21 and the second connector 41 are both FPC connectors.
Referring to fig. 4 and 5, a control circuit 5 is printed on a surface of the first connector 21, and the control circuit 5 includes a touch control chip 51. The touch control chip 51 is configured to collect a touch screen action of a user, convert an analog signal of the touch screen action of the user into a digital signal, and transmit the digital signal to the LCD display screen 4, so as to display the touch screen action of the user on the LCD display screen 4, such as point touch, line drawing, or respond to the touch screen action of the user. The touch control chip 51 adopts a high-precision touch screen controller with a signal of MXT336U, so that the touch display panel with an ultra-thick cover plate can maintain high sensitivity even under the condition of having a high-thickness cover plate.
Referring to fig. 5, the control circuit 5 includes a touch sensing circuit 52, and the touch sensing circuit 52 is connected to the touch control chip 51. The touch sensing circuit 52 includes a matching capacitor, and the sensitivity of the touch display panel with the ultra-thick cover plate can be adjusted by adjusting the capacitance of the matching capacitor. For example, when the sensitivity of the touch display panel with the ultra-thick cover plate is low, the touch operation of the user cannot normally respond on the LCD display screen 4, and at this time, the sensitivity can be improved by increasing the capacitance value of the matching capacitor, so that the touch operation of the user can be displayed on the display screen in time.
The touch control chip 51 comprises an internal register module 511, the internal register module 511 is used for setting a response threshold value, when a user touches the touch screen, the touch control chip 51 collects an analog quantity signal of a touch action of the user, the analog quantity signal exceeding the threshold value is converted into a digital signal, the analog quantity signal lower than the threshold value is not processed, and the setting of the threshold value in the internal register module 511 can reduce the interference of signals generated by abnormal touch such as air disturbance and the like on the screen.
Referring to fig. 2 and 4, a portion of the first connector 21 on which the main control circuit is printed is referred to as a soldering portion 211, the soldering portion 211 is located on an upper surface of the first connector 21, a reinforcing plate 212 is fixedly connected to a lower surface of the first connector 21, and the reinforcing plate 212 is disposed at a position corresponding to the soldering portion 211 to protect components on the soldering portion 211 and reduce the possibility that the components on the soldering portion 211 fall off due to bending of the first connector 21.
The implementation principle of the touch display panel with the ultra-thick cover plate in the embodiment of the application is as follows: when a user touches the touch screen, when the user touches the glass cover plate 1 with a finger, a coupling capacitance is formed between the user's finger and the sensing electrode unit, and then an action current flows to the user's finger at a contact point, the touch control chip 51 collects the action current and transmits the action current to the internal register module 511 as an analog quantity signal in a voltage form, the analog quantity signal is compared with a threshold value in the internal register module 511, when the analog quantity signal exceeds the threshold value set in the register circuit, the register circuit converts the analog quantity signal into a digital quantity signal and transmits the digital quantity signal to the control chip, and the control chip processes and transmits the digital quantity signal to the LCD display screen 4 to display the user's touch screen action or respond to the user's touch screen action.
Referring to fig. 6, fig. 6 is a block flow diagram of a testing method of a touch display panel with an ultra-thick cover plate according to an embodiment of the present disclosure. A test method of a touch display panel with an ultra-thick cover plate comprises the following steps:
step S100, connecting the touch display panel with the ultra-thick cover plate with a computer and opening a test program on the computer;
specifically, the first connector 21 on the touch display panel with the ultra-thick cover plate is connected with the test board, then the test board is connected with the computer through the USB interface on the test board, and the test program on the computer is opened. The test board is an Atmel _80753_ A2 test board, and the test program is TP-MaxTouch _ Analyzer _ V2.19.
Step S200, testing whether the touch function of the touch display panel of the ultra-thick cover plate is normal by using a test program;
if yes, go to step S300;
if not, the step S201 is executed;
step S201, detecting connection errors;
specifically, whether the touch function of the touch display panel with the ultra-thick cover plate is normal is detected through a test program, when the test program detects that the current touch function is abnormal, error prompt information of 'connection failure' or 'No device' characters is prompted on a program interface, and a tester is prompted to check whether the first connector 21 and the test plate have poor contact conditions or the connection line sequence is incorrect; when the test program detects that the current touch function is normal, a 'connection success' or a connected chip model, such as the model MXT336U of the touch control chip 51 in the embodiment of the present application, is presented on the test program.
Step S300, testing the sensitivity of the touch display panel with the ultra-thick cover plate, and judging whether the sensitivity is normal or not;
if the sensitivity is low, the process goes to step S301;
if the sensitivity is high, the step S302 is carried out;
if the result is normal, the step S303 is executed;
step S301, increasing the capacitance value of the matching capacitor in the touch sensing circuit 52, and returning to the step S300;
step S302, increasing the threshold value set in the internal register module 511, and returning to step S300;
step S303, the test is completed.
Specifically, a 'start Test' or 'Execute Test' button on a Test program interface is clicked, the Test program automatically detects the sensitivity of the touch display panel with the ultra-thick cover plate, the detected sensitivity parameters are compared with a standard value built in the Test program, and higher, lower or normal characters of the sensitivity of the touch display panel with the current ultra-thick cover plate are displayed on the Test program interface.
When the sensitivity of the touch display panel with the ultra-thick cover plate is high, the software program in the touch control chip 51 is modified to improve the threshold value in the internal register module 511, so that the sensitivity of the touch display panel with the ultra-thick cover plate is reduced, and the sensitivity test is performed again after adjustment.
When the sensitivity of the touch display panel with the ultra-thick cover plate is low, the sensitivity of the touch display panel with the ultra-thick cover plate is improved by increasing the capacitance value of the matching capacitor in the touch sensing circuit 52, 2.2nF is added each time when the capacitance value of the matching capacitor is increased, and the sensitivity test is carried out again after the capacitance value is adjusted.
And when the sensitivity of the touch display panel with the ultra-thick cover plate is normal, testing the touch display panel with the ultra-thick cover plate is completed.
The foregoing is a preferred embodiment of the present application and is not intended to limit the scope of the application in any way, and any features disclosed in this specification (including the abstract and drawings) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
Claims (8)
1. The utility model provides a super thick apron touch-control display panel which characterized in that: including glass apron (1) and LCD display screen (4), glass apron (1) thickness scope is 4 ~ 5mm, and one side fixedly connected with cover glass film (2) that glass apron (1) is close to the LCD display screen for sensing user's touch screen action produces the analog signal of touch screen action, cover glass film (2) and LCD display screen (4) link to each other, be provided with first connector (21) on cover glass film (2), first connector (21) are connected with cover glass film (2) electricity, the printing has control circuit (5) on first connector (21), and control circuit (5) are including touch control chip (51) that are used for gathering the analog signal of touch screen action, and touch control chip (51) are connected with touch-sensitive circuit (52) that are used for increasing super thick apron touch-sensitive display panel sensitivity.
2. The touch display panel with ultra-thick cover plate of claim 1, wherein: the model of the touch control chip (51) is MXT 336U.
3. The touch display panel with ultra-thick cover plate of claim 2, wherein: the touch control chip (51) comprises an internal register module (511) for setting a response threshold of an analog signal of a touch screen action.
4. The touch display panel with ultra-thick cover plate of claim 3, wherein: one surface, far away from the glass cover plate (1), of the chip on film (2) is fixedly connected with transparent ITO glass (3), and one surface, far away from the chip on film (2), of the transparent ITO glass (3) is connected with an LCD display screen (4).
5. The touch display panel with ultra-thick cover plate of claim 1, wherein: one surface of the first connector (21) which is not printed with the control circuit (5) is fixedly connected with a reinforcing sheet (212) for increasing the thickness of the first connector (21), and the position of the reinforcing sheet (212) corresponds to the position of the control circuit (5) on the first connector (21).
6. The touch display panel with ultra-thick cover plate of claim 1, wherein: the optimal thickness of the glass cover plate (1) is 4 mm.
7. The method for testing the touch display panel with the ultra-thick cover plate according to any one of claims 1 to 6, comprising:
connecting the touch display panel with the ultra-thick cover plate with a computer and opening a test program on the computer;
testing whether the touch function of the touch display panel of the ultra-thick cover plate is normal or not by using a test program;
if not, detecting a connection error;
if so, testing the sensitivity of the touch display panel with the ultra-thick cover plate, and judging whether the sensitivity is normal or not;
if the sensitivity is lower than the standard value in the test program, increasing the capacitance value of the matching capacitor in the touch sensing circuit (52);
if the sensitivity is higher than the standard value in the test program, the threshold value set in the internal register module (511) is increased;
and if the sensitivity is normal, completing the test.
8. The method for testing the touch display panel with the ultra-thick cover plate according to claim 6, wherein the detecting the connection error specifically comprises:
whether the first connector (21) and the test board have poor contact or wrong connection line sequence is detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110176001.1A CN112783374B (en) | 2021-02-06 | 2021-02-06 | Touch display panel with ultra-thick cover plate and test method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110176001.1A CN112783374B (en) | 2021-02-06 | 2021-02-06 | Touch display panel with ultra-thick cover plate and test method thereof |
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| CN112783374B CN112783374B (en) | 2023-03-28 |
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| CN112783374B (en) | 2023-03-28 |
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