CN114023187A - Touch-controlled segment code display screen - Google Patents
Touch-controlled segment code display screenDownload PDFInfo
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- CN114023187A CN114023187ACN202111250453.6ACN202111250453ACN114023187ACN 114023187 ACN114023187 ACN 114023187ACN 202111250453 ACN202111250453 ACN 202111250453ACN 114023187 ACN114023187 ACN 114023187A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- Human Computer Interaction (AREA)
- Position Input By Displaying (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
Description
Technical Field
The invention relates to the technical field of display screens, in particular to a display and touch integrated device for a segment code display screen.
Background
At present, although TFT-LCD has been widely used, the segment code display screen has low production cost, is simple and reliable, is convenient to use, and has a free format, and besides being widely used in various fields such as human-computer interfaces and handheld devices, the segment code display screen also has wide applications in the following fields, for example: instruments, instruments (gas meters, water meters, public transportation systems and oiling machine counting), office equipment (fax machines, card punches, attendance machines and access control systems), communication equipment (various IC card telephones, network telephones and IP telephones), bank systems (POS machines), tax systems (tax control machines), medical equipment (physiological monitors and various health care instruments), industrial control equipment (automatic control) and the like. In addition, with the technical development of segment code display screens, patterns and colors which can be displayed on the same segment code display screen are much richer than before, so that the application range is continuously expanded.
However, the existing segment code display screen does not have a touch function, and in order to be applied to occasions requiring touch control, a touch control module needs to be additionally added, so that the cost is increased, and the production and debugging are more troublesome.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a display and touch integrated device for a segment code display screen, wherein touch control and display driving are carried out on the same chip, and meanwhile, the segment code display screen is provided with touch sensing electrodes, an additional touch panel is not needed, and two functional modules work cooperatively, so that the touch effect can be improved, the cost is reduced, and the display effect is not influenced.
In order to achieve the purpose, the invention adopts the following specific technical scheme:
a touch-controllable segment code display screen comprises a segment code display screen and a display touch control chip, wherein the segment code display screen comprises a second type pin and a first type pin, and the touch display chip comprises a display driving circuit and a touch control circuit;
when the segment code display screen is in a display state, the second-class pins and the first-class pins are driven by the display driving circuit to drive the segment code display screen to display;
when the segment code display screen is in a touch scanning state, the second type pins and the first type pins are driven by the touch control circuit, so that the segment code display screen performs touch scanning detection.
In one embodiment, the touch display chip further includes a display touch switch, when the display chip is in a display state, the second type pins and the first type pins are driven by the display driving circuit through the display touch switch, and when the display chip is in a touch scanning state, the second type pins and the first type pins are driven by the touch control circuit through the display touch switch.
In one embodiment, the segment code display screen comprises an upper glass and a lower glass, wherein a first type of electrode for displaying characters is arranged on the upper glass, and a second type of electrode is arranged on the lower glass;
the first type electrode is connected with the first type pin, and the second type electrode is connected with the second type pin;
when the segment code display screen is in a touch scanning state, the first-class electrodes are used as touch sensing electrodes, a plurality of first-class pins corresponding to the same character are connected together, and then the first-class electrodes are connected with any one touch scanning detection circuit in the touch control circuit and the at least one touch scanning detection circuit, the first-class electrodes are driven by a second group of time sequences, the second-class electrodes are driven by a first group of time sequences, the first group of time sequences and the second group of time sequences have the same frequency, and the phase difference and the amplitude difference are respectively adjustable;
when the segment code display screen is in a display state, the first type electrodes and the second type electrodes are driven by a display driving circuit.
A touch-controllable segment code display screen comprises a segment code display screen and a display touch chip, wherein the segment code display screen comprises a second-class pin, a first-class pin and a touch driving pin, and the touch display chip comprises a display driving circuit and a touch control circuit;
when the segment code display screen is in a display state, the second-class pins and the first-class pins are driven by the display driving circuit to drive the segment code display screen to display;
when the segment code display screen is in a touch scanning state, the touch driving pin is driven by the touch control circuit, so that the segment code display screen is driven to perform touch scanning detection.
In one embodiment, the segment code display screen comprises an upper glass and a lower glass, wherein the upper glass is provided with a first type of electrode for displaying characters and a touch sensing electrode which is used for touch scanning and is not connected with the first type of electrode, and the lower glass is provided with a second type of electrode;
the first type of electrodes are connected with the first type of pins, the second type of electrodes are connected with the second type of pins, and the touch sensing electrodes are connected with the touch driving pins;
when the segment code display screen is in a touch scanning state, the touch control circuit drives the touch sensing electrodes through the touch driving pins, the first class pins connected with the first class electrodes and the second class pins connected with the second class electrodes are grounded, or the first class electrodes and the second class electrodes are driven at the same time sequence;
when the segment code display screen is in a display state, the touch sensing electrode is grounded, and the first type electrode and the second type electrode are driven by a display driving circuit through the second type pin and the first type pin.
In one embodiment, the segment code display screen comprises an upper glass and a lower glass, wherein the upper glass is provided with a first type of electrodes for displaying characters and touch sensing electrodes which are used for touch scanning and are not connected with the first type of electrodes, and the lower glass is provided with a second type of electrodes and sensing electrodes which correspond to the touch sensing electrodes and are not connected with the second type of electrodes;
the first type of electrodes are connected with the first type of pins, the second type of electrodes are connected with the second type of pins, the touch driving pins comprise first type of touch driving pins and second type of touch driving pins, the touch sensing electrodes are connected with the first type of touch driving pins, and the sensing electrodes are connected with the second type of touch driving pins;
when the segment code display screen is in a touch scanning state, the touch sensing electrodes are driven by a second group of time sequences of the touch control circuit through the first type of touch driving pins, the sensing electrodes are driven by a first group of time sequences of the touch control circuit through the second type of touch driving pins, the first group of time sequences and the second group of time sequences have the same frequency, the phase difference and the amplitude difference are respectively adjustable, the first type of electrodes and the second type of electrodes are both grounded, or the first type of electrodes and the second type of electrodes are both driven by the same time sequences;
when the segment code display screen is in a display state, the touch sensing electrodes and the sensing electrodes are grounded, and the first type electrodes and the second type electrodes are driven by a display driving circuit through the second type pins and the first type pins.
In one embodiment, the touch control circuit includes a VCOM _ PLS circuit and a touch scan detection circuit, wherein the VCOM _ PLS circuit includes a first switch and a second switch, a common terminal of the first switch and the second switch is connected to the second type pin through the display touch switch, the other terminal of the first switch is connected to ground, and the second switch is connected to a reference voltage VREF _TP 1; the touch scanning detection circuit comprises a touch detection channel, an ADC (analog to digital converter) and a digital processing circuit, the touch scanning detection channel comprises a third switch, a fourth switch and a charge processing circuit, the common end of the third switch and the fourth switch is connected with the first class pin through a display touch change-over switch, the other end of the third switch is grounded, the other end of the fourth switch is connected with one end of the charge processing circuit, the first to fourth switches of which the output voltage VREF _ TP from the charge processing circuit is controlled by the touch control timing, when the segment code display screen is in a touch scanning state, the first switch, the second switch are controlled by a first group of time sequence, the third switch and the fourth switch are driven by a second group of time sequence, the first group of time sequences and the second group of time sequences have the same frequency, and the phase difference and the amplitude difference of the first group of time sequences and the second group of time sequences are respectively adjustable.
In one embodiment, the first switch, the second switch, the third switch, and the fourth switch are placed in an open state when the segment code display screen is in a display state.
In one embodiment, the reference voltage VREF _ TP1 of the second switch connection is an adjustable voltage and the charge processing circuit output voltage VREF _ TP is an adjustable voltage.
In one embodiment, the touch control timing is used for touch detection, the display control timing is used for driving segment code screen display, and the touch control timing and the display control timing are alternately output, or always in the display control timing, or always in the touch control timing, or a plurality of display timings are inserted into one touch timing, or a plurality of touch timings are inserted into one display timing.
In one embodiment, when the segment code display screen is switched from the touch scanning state to the display state, the display driving circuit simultaneously grounds the second type pins and the first type pins or short-circuits the second type pins and the first type pins, and then performs display driving.
In one embodiment, the first electrode is an SEG electrode, the first pin connected with the first electrode is an SEG pin, the second electrode is a COM electrode, and the second pin connected with the second electrode is a COM pin; or, the first electrode is a COM electrode, the first pin connected to the first electrode is a COM pin, the second electrode is an SEG electrode, and the second pin connected to the second electrode is an SEG pin.
In one embodiment, the touch scan detection circuit is further connected with an automatic calibration unit, the automatic calibration unit is connected with the charge processing circuit and a common terminal of the fourth switch, and the unit to be detected including one or more electrodes can be calibrated independently to adapt to different patterns on the same screen.
The invention has the beneficial effects that: the touch control circuit and the display driving circuit are arranged on the same chip, the segment code display screen comprises a second type pin and a first type pin, and when the segment code display screen is in a display state, the second type pin and the first type pin are driven by the display driving circuit to drive the segment code display screen to display; when the segment code display screen is in a touch scanning state, the second type pins and the first type pins are driven by the touch control circuit, so that the segment code display screen performs touch scanning detection, and both display and touch scanning detection can be achieved.
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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a first embodiment of a touch display integrated device for segment code display screen according to the present invention;
FIG. 2 is a schematic diagram of a conventional segment code display panel and its driving sequence;
FIG. 3 is a segment code display screen showing a touch integrated device implementation;
FIG. 4 is a schematic circuit diagram of a touch chip;
FIG. 5 is a schematic diagram of a touch detection circuit and its driving timing sequence;
FIG. 6 is a touch detection circuit with calibration functionality;
FIG. 7 is a schematic diagram showing a touch-alternate operating state;
fig. 8 is a schematic diagram of a second embodiment of a touch display integrated device for a segment code display screen according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Other embodiments, which can be derived by one of ordinary skill in the art from the embodiments given herein without any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
At present, if the touch function is to be realized to the segment code display screen, need increase the touch module on the segment code display screen, the technology is realized comparatively complicatedly, and the cost is also higher, will make ordinary segment code display screen realize taking the touch function, need corresponding chip cooperation just can, this chip will realize showing drive function and touch detection function, and will make demonstration and touch can normal work in addition, also the touch does not influence the demonstration, shows and does not influence the touch, both will cooperate mutually.
Therefore, the application provides a touch-controllable segment code display screen with a simple structure, as shown in fig. 1 and fig. 2, specifically comprising a segmentcode display screen 10 and adisplay touch chip 20, wherein the segmentcode display screen 10 comprises a second type pin and a first type pin, thetouch display chip 20 comprises adisplay driving circuit 203 and atouch control circuit 202, and when the segmentcode display screen 10 is in a display state, the second type pin and the first type pin are driven by thedisplay driving circuit 203 to drive the segmentcode display screen 10 to display; when the segmentcode display screen 10 is in the touch scanning state, the second type pins and the first type pins are driven by thetouch control circuit 202, so that the segmentcode display screen 10 performs touch scanning detection.
The first type of pins in this embodiment may be COM pins, and the second type of pins may be SEG pins, but of course, in another embodiment, the first type of pins may also be SEG pins, and the second type of pins may also be COM pins.
In this embodiment, the circuit for driving display and the circuit for touch scanning are integrated in the chip, the circuit for driving display drives the segmentcode display screen 10 to display when display is needed, and the circuit for touch scanning drives the segment code screen to perform touch scanning when touch scanning detection is needed.
In a further embodiment, thedisplay touch chip 20 further includes adisplay touch switch 201, as shown in fig. 3, thedisplay touch switch 201 is integrated on thedisplay touch chip 20. The segmentcode display screen 10 comprises N +1 COM pins and M +1 SEG pins, thedisplay touch chip 20 comprises adisplay driving circuit 203 and atouch control circuit 202, when the segment code display screen is in a display state, the COM pins and the SEG pins are communicated with thedisplay driving circuit 203 through adisplay touch switch 201, and thedisplay driving circuit 203 drives the segmentcode display screen 10 to display; when the segment code display screen is in a touch scanning state, the COM pin and the SEG pin are communicated with thetouch control circuit 202 through thedisplay touch switch 201, so that thetouch control circuit 202 performs touch scanning detection on the segmentcode display screen 10. The N +1 COM pins and the M +1 SEG pins described above are the first-type pins and the second-type pins, respectively, or the second-type pins and the first-type pins, respectively.
In a specific embodiment, as shown in fig. 3, the segmentcode display screen 10 is connected to thedisplay touch chip 20 through N +1 first-type pins COM 0-COMN and second-type pins SEG 0-SEGM, thedisplay touch chip 20 includes adisplay touch switch 201, adisplay driving circuit 203, alogic circuit 204, and atouch control circuit 202, thedisplay touch switch 201 includes switches corresponding to the number of pins, the switches are respectively connected to thedisplay driving circuit 203 and thetouch control circuit 202, and thelogic circuit 204 is respectively connected to thedisplay driving circuit 203 and thetouch control circuit 202 in a bidirectional manner. Thedisplay touch chip 20 further includes apower generation circuit 205 and an interface circuit 206.
As shown in fig. 4, thetouch control circuit 202 includes a VCOM_ PLS circuit 2021, X touchscan detection circuits 2022, an ADC2023, and adigital control chip 2024, the touchscan detection circuit 2022 is connected to thedigital control chip 2024 through the ADC2023, and the VCOM _ PLS channel is connected to thedigital control chip 2024. If thedisplay touch chip 20 receives a display timing sequence for driving display, the first type pins COM 0-COMN and the second type pins SEG 0-SEGM are communicated with thedisplay driving circuit 203 through thedisplay touch switch 201, and if thedisplay touch chip 20 receives a touch timing sequence for driving touch scanning, all the first type pins COM 0-COMN are connected with the pin VCOM _ PLS of thetouch control circuit 202, and after a plurality of SEG pins corresponding to the same character are connected together, the first type pins COM 0-COMN are connected with the same touchscanning detection circuit 2022. According to the actual graph of the segmentcode display screen 10, it is possible that one SEG corresponds to one character, and at this time, only the corresponding SEG is connected to the touch scanning detection circuit; it is also possible that more than two SEGs correspond to a character, in which case multiple SEGs corresponding to a character need to be concatenated.
Further, the VCOM _PLS circuit 2021 includes afirst switch Φ 1A and a second switch Φ 2A, a common terminal connection pin COM 0-COMN of thefirst switch Φ 1A and the second switch Φ 2A, the other terminal of thefirst switch Φ 1A is grounded, and the other terminal of the second switch Φ 2A outputs a voltage VREF _ TP. As shown in fig. 5, the touchscan detection circuit 2022 includes athird switch Φ 1, afourth switch Φ 2, afifth switch Φ 3, a capacitor Cf, and an operational amplifier, a common end of thethird switch Φ 1 and thefourth switch Φ 2 is connected to the pin SEG, the other end of thethird switch Φ 1 is grounded, the other end of thefourth switch Φ 2 is connected to the positive input end of the operational amplifier, VREF _ TP is connected to the negative input end of the operational amplifier, one end of thefifth switch Φ 3 and the capacitor Cf is connected to the positive input end of the operational amplifier, and the other end is connected to the output end of the operational amplifier.
The displaytouch control chip 20 integrated with thetouch control circuit 202 and thedisplay driving circuit 203 is connected with the segmentcode display screen 10 through the display touch control change-over switch, and the touch control function of the segmentcode display screen 10 is realized without arranging a piece of touch sensing glass outside the upper surface of the segmentcode display screen 10.
In one embodiment, the segment code display screen 10 includes an upper glass and a lower glass, a first type of electrode for displaying characters is disposed on the upper glass, and a second type of electrode is disposed on the lower glass, in this embodiment, in order to not affect normal display of the segment code display screen 10 when the segment code display screen 10 performs touch detection, that is, when pins of the segment code display screen 10 are connected to the touch control circuit 202, normal display of the segment code display screen 10 is not affected, the first type of electrode for displaying characters of the upper glass is used as a touch sensing electrode, and the first type of electrode is connected to M +1 first type of pins; when the segment code display screen is in a touch scanning state, a plurality of first-class pins corresponding to the same character are connected together and then connected with the same touch scanning detection circuit, the first-class electrodes are driven by a second-group time sequence, the second-class electrodes are driven by a first-group time sequence, the first-group time sequence is the same as the second-group time sequence or the frequency of the first-group time sequence is the same as the frequency of the second-group time sequence, and the phase and amplitude of the first-group time sequence and the second-group time sequence are adjustable.
When the segmentcode display screen 10 is in the display state, the first type electrodes and the second type electrodes are driven by thedisplay driving circuit 203.
In this embodiment, the first electrode is an SEG electrode, the first pin connected to the first electrode is an SEG pin, the second electrode is a COM electrode, and the second pin connected to the second electrode is a COM pin; or, the first electrode is a COM electrode, the first pin connected to the first electrode is a COM pin, the second electrode is an SEG electrode, and the second pin connected to the second electrode is an SEG pin.
As shown in FIG. 7, the second-type electrodes are connected to N +1 second-type pins. In fig. 7, Display is a Display stage, TP is a touch scanning stage, in the touch scanning stage, the timings transmitted to the first class of pins and the second class of pins are the same or approximately the same, that is, when the segmentcode Display screen 10 is in a touch scanning state, thefirst switch Φ 1A and the second switch Φ 2A are controlled by a first group of timings, and thethird switch Φ 1 and thefourth switch Φ 2 are driven by a second group of timings, where the first group of timings is the same or approximately the same as the second group of timings.
That is, the touch sensing electrodes on the upper glass of the segmentcode display screen 10 can be directly driven by the first-class electrodes of the display characters, at this time, the lower glass has corresponding electrodes (COM), and during touch detection, the first-class electrodes are driven by the second-group timing sequence, and the second-class electrodes are driven by the first-group timing sequence. In another embodiment, it is also possible to fix thefirst switch Φ 1A and the second switch Φ 2A to be always in the off state (i.e., the floating state) at the time of touch detection.
In the Display stage (Display), the SEG and the COM control the voltage at two ends of the liquid crystal to change continuously and alternately, and ensure that the positive pressure difference and the negative pressure difference have the same value, when the positive pressure difference and the negative pressure difference are larger, the liquid crystal is in an open state, and when the positive pressure difference and the negative pressure difference are smaller, the liquid crystal is in a closed state, so that the segmentcode Display screen 10 can normally Display, in the touch detection stage (TP), the first type electrode of the upper glass is used as an induction electrode, and the voltage corresponding to the capacitance of the electrode can be detected according to the figure and the circuit of fig. 3; meanwhile, the second electrode is driven by a waveform similar to the first electrode, so that the voltage difference between two ends of the liquid crystal is 0, namely the liquid crystal is controlled to be always in a closed state in a TP scanning stage, and the display effect is not influenced.
In another embodiment, the segmentcode display screen 10 includes a second type pin, a first type pin, and a touch driving pin, and the touch display chip includes adisplay driving circuit 203 and atouch control circuit 202. When the segmentcode display screen 10 is in a display state, the second type pins and the first type pins are driven by thedisplay driving circuit 203 to drive the segmentcode display screen 10 to display; when the segmentcode display screen 10 is in a touch scanning state, the touch driving pins are driven by thetouch control circuit 202, so as to drive the segmentcode display screen 10 to perform touch scanning detection.
In this embodiment, the segmentcode display screen 10 includes an upper glass and a lower glass, the upper glass is provided with a first type of electrodes for displaying characters and touch sensing electrodes for touch scanning and not connected to the first type of electrodes, and the lower glass is provided with a second type of electrodes; the first type of electrodes are connected with the first type of pins, the second type of electrodes are connected with the second type of pins, and the touch sensing electrodes are connected with the touch driving pins.
When the segmentcode display screen 10 is in a touch scanning state, thetouch control circuit 202 drives the touch sensing electrodes through the touch driving pins, and the first type pins connected to the first type electrodes and the second type pins connected to the second type electrodes are both grounded, or the first type electrodes and the second type electrodes are both driven at the same time sequence.
When the segmentcode display screen 10 is in a display state, the touch sensing electrodes are grounded, and the first type electrodes and the second type electrodes are driven by the display driving circuit through the second type pins and the first type pins.
In another embodiment, the segmentcode display screen 10 includes an upper glass and a lower glass, the upper glass is provided with a first type of electrodes for displaying characters and a touch sensing electrode for touch scanning and not connected to the first type of electrodes, the lower glass is provided with a second type of electrodes and a sensing electrode corresponding to the touch sensing electrode and not connected to the second type of electrodes, the first type of electrodes are connected to the first type of pins, the second type of electrodes are connected to the second type of pins, the touch driving pins include a first type of touch driving pins and a second type of touch driving pins, the touch sensing electrode is connected to the first type of touch driving pins, and the sensing electrode is connected to the second type of touch driving pins.
When the segmentcode display screen 10 is in a touch scanning state, the touch sensing electrodes are driven by the second group of time sequences of thetouch control circuit 202 through the first type of touch driving pins, the sensing electrodes are driven by the first group of time sequences of the touch control circuit through the second type of touch driving pins, the first group of time sequences and the second group of time sequences have the same frequency, the phase difference and the amplitude difference are respectively adjustable, the first type of electrodes and the second type of electrodes are both grounded, or the first type of electrodes and the second type of electrodes are both driven by the same time sequences.
When the segmentcode display screen 10 is in a display state, the touch sensing electrodes and the sensing electrodes are both grounded, and the first type electrodes and the second type electrodes are driven by thedisplay driving circuit 203 through the second type pins and the first type pins.
In this embodiment, the first electrode is an SEG electrode, the first pin connected to the first electrode is an SEG pin, the second electrode is a COM electrode, and the second pin connected to the second electrode is a COM pin; or, the first electrode is a COM electrode, the first pin connected to the first electrode is a COM pin, the second electrode is an SEG electrode, and the second pin connected to the second electrode is an SEG pin.
That is, the touch sensing electrode can also be a sensing electrode on the upper glass of the segmentcode display screen 10 and connected with the first type of electrode, and at this time, the lower glass can also be an electrode with the same pattern as the upper glass, or not processed at all. If the same electrode is used, the touch electrode can be connected with the second type of electrode or not, meanwhile, during touch detection, the touch electrode and the touch sensing electrode of the upper glass are driven by the same or two similar driving time sequences, or the first switch and the second switch can be fixedly in an off state (namely, a floating state), wherein the two similar driving time sequences mean that the frequency of the first group of time sequences is the same as that of the second group of time sequences, and the phase and amplitude of the first group of time sequences and the second group of time sequences can be adjusted.
In one embodiment, the reference voltage VREF _ TP1 of the second switch connection is an adjustable voltage, as is the charge processing circuit output voltage VREF _ TP.
In one embodiment, the touch control timing and the display control timing are alternately output, or always in the display control timing, or always in the touch control timing, or a plurality of display timings are inserted into one touch timing, or a plurality of touch timings are inserted into one display timing.
In one embodiment, when the segmentcode display screen 10 is switched from the touch scanning state to the display state, thedisplay driving circuit 203 simultaneously grounds the second type pins and the first type pins or short-circuits the second type pins and the first type pins, and then starts normal display driving.
In one embodiment, as shown in fig. 6, the touchscan detection circuit 2022 is further connected to an auto-calibration unit, which is connected to a common terminal of the charge processing circuit and the fourth switch. Since there may be multiple display patterns on a screen, and the sizes of different patterns may be different, the sizes of the touch sensing electrodes may be different, and the touch detection circuit is designed to be automatically calibrated to accommodate sensing electrodes of different sizes.
In one embodiment, as shown in fig. 8, thedisplay touch chip 20 includes a main control module, and the touch segment code display screen including the main control module can be directly connected to a peripheral device.
In one embodiment, as shown in fig. 1, thedisplay touch chip 20 does not include a main control module, and at this time, the display touch chip is connected to an external main control module through an interface circuit and a power supply circuit.
In light of the foregoing description of the preferred embodiments of the present invention, those skilled in the art can now make various alterations and modifications without departing from the scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and must be determined according to the scope of the claims.
Claims (13)
1. A touch-control segment code display screen is characterized by comprising a segment code display screen and a display touch control chip, wherein the segment code display screen comprises a second type pin and a first type pin, and the touch display chip comprises a display driving circuit and a touch control circuit;
when the segment code display screen is in a display state, the second-class pins and the first-class pins are driven by the display driving circuit to drive the segment code display screen to display;
when the segment code display screen is in a touch scanning state, the second type pins and the first type pins are driven by the touch control circuit, so that the segment code display screen performs touch scanning detection.
2. The touch-sensitive segment code display screen of claim 1, wherein the touch display chip further comprises a display touch switch, and when the touch display chip is in a display state, the second type pins and the first type pins are driven by the display driving circuit through the display touch switch, and when the touch display chip is in a touch scanning state, the second type pins and the first type pins are driven by the touch control circuit through the display touch switch.
3. The touch-controllable segment code display screen according to claim 1 or 2, wherein the segment code display screen comprises an upper glass and a lower glass, wherein the upper glass is provided with a first type of electrode for displaying characters, and the lower glass is provided with a second type of electrode;
the first type electrode is connected with the first type pin, and the second type electrode is connected with the second type pin;
when the segment code display screen is in a touch scanning state, the first-class electrodes are used as touch sensing electrodes, a plurality of first-class pins corresponding to the same character are connected together, and then the first-class electrodes are connected with any one touch scanning detection circuit in the touch control circuit and the at least one touch scanning detection circuit, the first-class electrodes are driven by a second group of time sequences, the second-class electrodes are driven by a first group of time sequences, the first group of time sequences and the second group of time sequences have the same frequency, and the phase difference and the amplitude difference are respectively adjustable;
when the segment code display screen is in a display state, the first type electrodes and the second type electrodes are driven by a display driving circuit.
4. A touch-control segment code display screen is characterized by comprising a segment code display screen and a display touch control chip, wherein the segment code display screen comprises a second-class pin, a first-class pin and a touch driving pin, and the touch display chip comprises a display driving circuit and a touch control circuit;
when the segment code display screen is in a display state, the second-class pins and the first-class pins are driven by the display driving circuit to drive the segment code display screen to display;
when the segment code display screen is in a touch scanning state, the touch driving pin is driven by the touch control circuit, so that the segment code display screen is driven to perform touch scanning detection.
5. The touch-controllable segment code display screen according to claim 4, wherein the segment code display screen comprises an upper glass and a lower glass, the upper glass is provided with a first type of electrode for displaying characters and a touch-sensitive electrode for touch scanning and not connected with the first type of electrode, and the lower glass is provided with a second type of electrode;
the first type of electrodes are connected with the first type of pins, the second type of electrodes are connected with the second type of pins, and the touch sensing electrodes are connected with the touch driving pins;
when the segment code display screen is in a touch scanning state, the touch control circuit drives the touch sensing electrodes through the touch driving pins, the first type pins connected with the first type electrodes and the second type pins connected with the second type electrodes are both grounded, or the first type electrodes and the second type electrodes are both driven at the same time sequence;
when the segment code display screen is in a display state, the touch sensing electrode is grounded, and the first type electrode and the second type electrode are driven by a display driving circuit through the second type pin and the first type pin.
6. The touch-controllable segment code display screen according to claim 4, wherein the segment code display screen comprises an upper glass and a lower glass, the upper glass is provided with a first type of electrode for displaying characters and a touch-control sensing electrode for touch-control scanning and not connected with the first type of electrode, and the lower glass is provided with a second type of electrode and a sensing electrode corresponding to the touch-control sensing electrode and not connected with the second type of electrode;
the first type of electrodes are connected with the first type of pins, the second type of electrodes are connected with the second type of pins, the touch driving pins comprise first type of touch driving pins and second type of touch driving pins, the touch sensing electrodes are connected with the first type of touch driving pins, and the sensing electrodes are connected with the second type of touch driving pins;
when the segment code display screen is in a touch scanning state, the touch sensing electrodes are driven by a second group of time sequences of the touch control circuit through the first type of touch driving pins, the sensing electrodes are driven by a first group of time sequences of the touch control circuit through the second type of touch driving pins, the first group of time sequences and the second group of time sequences have the same frequency, the phase difference and the amplitude difference are respectively adjustable, the first type of electrodes and the second type of electrodes are both grounded, or the first type of electrodes and the second type of electrodes are both driven by the same time sequences;
when the segment code display screen is in a display state, the touch sensing electrodes and the sensing electrodes are grounded, and the first type electrodes and the second type electrodes are driven by a display driving circuit through the second type pins and the first type pins.
7. The touch-sensitive segment code display screen of claim 1 or 4, wherein the touch control circuit comprises a VCOM _ PLS circuit and a touch scan detection circuit, wherein the VCOM _ PLS circuit comprises a first switch and a second switch, a common terminal of the first switch and the second switch is connected to the second class pin through a display touch switch, the other terminal of the first switch is grounded, and the second switch is connected to a reference voltage VREF _ TP 1; the touch scanning detection circuit comprises a touch detection channel, an ADC (analog to digital converter) and a digital processing circuit, the touch scanning detection channel comprises a third switch, a fourth switch and a charge processing circuit, the common end of the third switch and the fourth switch is connected with the first class pin through a display touch change-over switch, the other end of the third switch is grounded, the other end of the fourth switch is connected with one end of the charge processing circuit, the first to fourth switches of which the output voltage VREF _ TP from the charge processing circuit is controlled by the touch control timing, when the segment code display screen is in a touch scanning state, the first switch, the second switch are controlled by a first group of time sequence, the third switch and the fourth switch are driven by a second group of time sequence, the first group of time sequences and the second group of time sequences have the same frequency, and the phase difference and the amplitude difference of the first group of time sequences and the second group of time sequences are respectively adjustable.
8. The touch-enabled segment code display screen of claim 7, wherein the first switch, the second switch, the third switch, and the fourth switch are in an off state when the segment code display screen is in a display state.
9. The touch-sensitive segment code display screen of claim 7, wherein the reference voltage VREF _ TP1 of the second switch connection is an adjustable voltage and the charge processing circuit output voltage VREF _ TP is an adjustable voltage.
10. The touch-enabled segment code display screen according to claim 1 or 4, wherein the touch control timing is used for touch detection, the display control timing is used for driving segment code display, and the touch control timing and the display control timing are alternately output, or always in the display control timing, or always in the touch control timing, or a plurality of display timings are inserted into one touch timing, or a plurality of touch timings are inserted into one display timing.
11. The touch-sensitive segment code display screen according to claim 1 or 4, wherein when the segment code display screen is switched from the touch scanning state to the display state, the display driving circuit simultaneously grounds the second type pins and the first type pins or short-circuits the second type pins and the first type pins, and then performs display driving.
12. The touch-sensitive segment code display screen of claim 3, 5 or 6, wherein the first electrodes are SEG electrodes, the first pins connected to the first electrodes are SEG pins, the second electrodes are COM electrodes, and the second pins connected to the second electrodes are COM pins; or, the first electrode is a COM electrode, the first pin connected to the first electrode is a COM pin, the second electrode is an SEG electrode, and the second pin connected to the second electrode is an SEG pin.
13. The touch-sensitive segment code display screen of claim 7, wherein the touch scan detection circuit is further connected to an auto-calibration unit, and the auto-calibration unit is connected to the charge processing circuit and a common terminal of the fourth switch, and can individually calibrate the to-be-detected unit including one or more electrodes to adapt to different patterns on the same screen.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111250453.6ACN114023187B (en) | 2021-10-26 | 2021-10-26 | Touch-controlled segment code display screen |
| PCT/CN2021/128849WO2023070722A1 (en) | 2021-10-26 | 2021-11-05 | Touch-controllable segment display screen |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111250453.6ACN114023187B (en) | 2021-10-26 | 2021-10-26 | Touch-controlled segment code display screen |
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| CN114023187B CN114023187B (en) | 2022-11-29 |
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| CN114023187B (en) | 2022-11-29 |
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