TW201120844A - Touch-control display capable of removing touch-control impact on display. - Google Patents

Abstract

The present invention discloses a touch-control display capable of removing touch-control impact on display, which includes: an active display, a display driving circuit, a touch-control circuit and a display/touch-control signal strobe output circuit or a display/touch-control signal load circuit. One substrate of the display is provided with a row and column electrode set, and another substrate of the display is provided with a common electrode. There is a frame blanking time period between each two display scanning time periods of the electrode of the display. During this time period, the display does not execute the display driving by stopping scanning the row electrode, the column electrode and common electrode remain in an original outputting state or a certain preset outputting signal, and some or all of the active elements in the display are on a cut-off state. During the period of transmitting the touch-control signal by the display electrode, the transient potential difference of the applied touch-control signal between each electrode enables the active elements to remain in the cut-off state, thereby removing the touch-control signal impact on display.

Description

201120844 VI. Description of the invention: [Technology of the invention] _] The present invention relates to a touch panel (four) 11, in particular to a touch. Display. [Prior Art] _2] Touch screen development has been widely used in personal computers' smart phones, public information, smart home appliances, industrial control and other fields. In the current touch field, there are mainly resistive touch screens, photoelectric touch screens, ultrasonic touch power lines, and flat capacitive touch screens. In recent years, the projected capacitive touch screen has been insulted quickly. However, these touch screens have their own technical shortcomings, which have been widely used in some special occasions - a ; r δ s s-gi: i: ig. : 3⁄4 - 3⁄43⁄4, but difficult to use on ordinary displays Promotion should be '^ β [0003] display and touch screen is a twin product, in the current technology, usually the display and touch screen independently bear the display and touch task 8 currently this discrete touch function The flat panel display is composed of a display, a display driver, a touch screen, a touch signal (S i gna 1) detector, a backlight Q, and the like. The touch screen has a resistive, capacitive, and electromagnetic type using different game test principles. , ultrasonic and photoelectric, etc., displays have passive liquid crystal display (TN/STN-LCD), active liquid crystal display (TFT-LCD), organic light-emitting diode display (OLED, AM-0LED), plasma display (PDP) ), carbon nanotube display, electronic paper (e_paper), etc. A flat panel display with a touch screen is to position the cursor on the display to follow the touch point by splitting the touch screen and the display layer to the position of the touch point detected by the touch screen. The cascading of the touch screen and the display makes the touch panel display thicker and heavier and the cost increases 098142156 Form No. A0101 Page 3 / Total 77 Page 0993125345-0 201120844 : Touch screen feeling when the touch screen is placed in front of the display The reflection generated by the measuring electrode causes the display to be uneven and the display contrast to decrease in a strong external light environment, which affects the display effect. Integrating the touchpad and the display to make the flat-panel display with touch function lighter and thinner is the direction of people's efforts. [0004] Finding a solution to the above-mentioned structural complexity problem, improving the reliability of the flat panel display with touch control function, improving the display effect, compressing the thickness, and reducing the cost, and implementing the touch function of the flat panel display in a simple manner is necessary. [0005] The application form is CN20061 00948141, the name is "touch type flat panel display" and the application number is CN20061 0 1 065583, the name is "flat display with touch function" Chinese invention patent specification, respectively revealing a touch The connection between the detecting circuit and the display electrode, the display electrode transmits the display driving signal through the analog switch or the loading circuit, and transmits and senses the touch signal, and the display driving and the touch detecting time-multiplexed or simultaneously share the display The electrodes and display electrodes are used for both display driving and touch detection, thus innovatively introducing the concept of a "touch type flat panel display". [0006] The application number is CN20091 02035358, the Chinese invention patent specification entitled "Drive Implementation of a Touch Panel Display", the application number is CN20091 01 399060, and the name is "Drive Implementation of a Touch Panel Display" The invention patent specification, the application number of CN20081 013341 7X, the Chinese invention patent specification entitled "One Touch Panel Display", further improves the touch panel display. 098142156 Form No. A0101 Page 4 / 77 Page 0993125345-0 201120844 [0007] The basic working principle of the touch panel display disclosed in the above Chinese patent is to use two sets of intersecting electrodes on the display as touch The sensing electrode, each electrode line of the electrode group is connected to the touch excitation source, and the touch excitation source applies an alternating current or direct current touch excitation signal to the electrode line. When a person's finger or other touch object approaches or touches an electrode line, the touch circuit detects the change of the touch signal of each electrode line to find the position of the finger or other touch object on the display. This is a new touch detection technology that combines display and touch. It has a significant cost advantage and has broad development prospects. SUMMARY OF THE INVENTION [0008] An object of the present invention is to provide a touch display capable of eliminating a touch-sensitive display, and to solve the problem of how to eliminate the influence of a touch signal on a display. To this end, the touch display provided by the present invention includes an active display, a display driving circuit, a touch circuit, and a display/touch signal strobe output for the display electrode to be used for both display driving and touch detection. The circuit or the display/touch signal loading circuit; the touch circuit has a touch excitation source and a touch signal detection circuit; and the display/touch signal strobe output circuit connects the display electrode or the display drive circuit Transmitting a display driving signal, or communicating with the touch circuit to transmit a touch signal, the display driving and the touch detecting time-division display electrode; the display/touch signal loading circuit enables the display electrode to simultaneously transmit the display driving signal and the touch signal The display driver and the touch detection share the display electrode at the same time; the active device array and the column (R 〇w ) electrode group and the column electrode group connected to the active device array are arranged on one substrate of the display, and the display electrode is further 098142156 on a piece of substrate Form No. A0101 Page 5 / Total 77 Page 0993125345-0 201120844 - There is an electrode, passed on the display electrode During the time period in which the display signal is transmitted: the display drive circuit performs sequential scanning on the column electrodes on the display, and the row electrodes and the shared ((10)) electrodes on the display are combined to output corresponding display signals; between each display scan period There is - (4) hidden time period, in which the display does not perform display driving, and the column electrode scanning stops. The display driving circuit outputs a non-selection signal to all the column electrodes, and the D electrode and the COM electrode maintain the original output state or A preset output signal 'some or all of the active devices on the display are in an off state; during the period in which the display electrodes transmit the touch signals, the applied touch signals have a transient potential difference between the electrodes. Keep the active device on the display in a worn state, eliminating the effect of the touch signal on the display. [0014] [0014] Further, in a preferred embodiment of the present invention: wherein the active device of the upper portion of the display is in an off state, the display is displayed on the display Active devices with directly connected pixels remain off. ..... .. : where the influence of the touch signal on the display is excluded, and the transient potential difference of the touch signal applied to the electrode lines of the column electrode group and the row electrode group connected to the active device array is Keep all or part of the active device on the display off. The effect of eliminating the touch signal on the display is the transient potential difference of the touch signal applied to the partial electrode line and the common electrode in the column electrode group or the row electrode group connected to the active device array, so that the partial electrode is connected. The active device of the line remains off. The active device array on the display substrate is a thin film field effect transistor 098142156 Form No. A0101 Page 6 / 77 pages 0993125345-0 201120844 Crystal circular array, the column electrode lines are respectively connected to the gate of the thin film field effect transistor (TFT) a gate and a drain connected to a thin film field effect transistor (TFT), respectively, and a touch signal applied to each of the electrode lines of the column electrode group and the row electrode group of the (4) array. The transient potential difference' causes all or part of the thin film field effect transistor (TFT) on the display to remain in a loaded state. The active device array on the display substrate is a thin film field effect transistor (TFTW train, column row) The electrode wires are respectively connected to the gate and source of the thin film field effect transistor (TFT) or to the gate and drain of the thin film field effect transistor (TFT), respectively, and the connection film % effect in the row electrode or row electrode line The transient potential difference of the touch signal applied to the electrode line of the electric BB body (TFT) gate and the common electrode keeps all or part of the active device on the display off. 6] The touch signal relationship between the electrodes to which the touch signal is applied is to keep the average value of the potential difference between the electrodes unchanged, so that the display effect does not change appreciably. - . . . - [0017 Wherein, during a period in which the display electrode transmits the touch signal, the potential difference of the touch signals between the different electrode groups has a period of constant. [0018] wherein, during each period of the display electrode transmitting the touch signal, different electrodes The potential difference of the touch signals between the groups remains unchanged. [0019] The touch signals applied on the column electrode groups or on the common electrodes are mixed signals of AC signals or AC signals and DC signals. The waveform of the AC signal component in the touch signal is one of an AC waveform such as a square wave, a sine wave, a triangle wave, and a sawtooth wave. 098142156 Form No. A0101 Page 7 of 77 0993125345-0 201120844 [0021] The frequency of the AC signal component in the touch signal is above 10 kHz or 10 k Η z. [0022] wherein the active display is a thin film field effect transistor liquid crystal display (TFT) -LCD) or one of other active liquid crystal displays, active organic light emitting diode displays, and active carbon nanotube displays. [0023] As described above, the touch display of the present invention can eliminate the touch influence display The method disclosed in the present invention ensures that the thin film field effect transistor (TFT) is in the touch detection state by selecting a reasonable touch excitation signal scheme. The cut-off state allows the display effect to be unaffected by the touch excitation signal, and at least the effect is controlled to a negligible degree, effectively realizing the time division multiplexing (TDM) of the display electrodes. [Embodiment] The present invention is applicable to a liquid crystal display (LCD) including an anode electrode and a row electrode, an organic light emitting diode display (0LED, AM 0LED), and a plasma display ( Flat panel displays such as PDP), carbon nanotube displays, and e-paper. The content of the present specification is described by a typical representative thin film transistor LCD (TFT-LCD) of an active liquid crystal display. [0027] A thin film field effect transistor liquid crystal display screen display is a typical representative of an active matrix liquid crystal display (AM LCD), which uses a thin film field effect transistor (TFT) on a substrate as a switching device. A typical structure of a thin film field effect transistor display (TFT-LCD) is shown in Fig. 1: 110 is a film field 098142156 Form No. A0101 Page 8 / Total 77 Page 0993125345-0 201120844 Effect transistor (ΤρΤ) LCD screen ; 12 () trace electrode, 121 199 疋 liquid screen horizontally sweep the electrode line); u 〇 is the liquid crystal screen vertical square 2 2m is the scan electrode line ( ..., Ι 3η Η I machine up the direction of the shell material line Electrode, 131, data electrode line (row electrode line

The electrode '', 140 is the common electrode (COM reference potential.1ςηβ 疋 for the reading of the pixel, and the gate of the liquid crystal screen is connected to the water mi ^tmtaa|tTFT, connected to the ... (4) Riding, source line, (Drai·connected to display image

=: 1 pixel pixel corresponding to the liquid crystal molecule box, placed in a capacitor, this capacitor is generally defined as CLC; 170 疋 storage capacitor (Capacitance St〇ratt

Cs), used to store information on pixels that are not pixelated; 180 is the common electrode voltage source responsible for generating the common electrode reference voltage (VReference); i8i is the gate electrode of the thin film field effect transistor display (TFT-LCD) The column electrode driver is used to drive the horizontal scanning line; the 182 is the source field electrode driver of the thin film field effect transistor display (TFT-LCD) for driving the vertical direction data. Line; 183疋 timing controller (Timing uContrro 11 er) is responsible for receiving RGB data from the signal processing chip, clock signal Clock, horizontal sync Hsync and vertical sync signal vsync, and converting these signals to control source Pole (row electrode) driver (S〇urce

Driver) and gate (gate electrode) driver (Gate Driver) work together 0 [〇〇28] A display pixel is generally composed of three sub-pixels displaying three primary colors of red, green and blue. A schematic diagram of a display sub-pixel is shown in Figure 2: 098142156 Form nickname A0101 Page 9 of 77 0993125345-0 201120844

Gi represents a horizontal direction column scan electrode line, also referred to as a column drive electrode line or a gate drive electrode line, and the potential on Gi is Vg; Sj represents a vertical direction data electrode line, also called a row drive electrode line or a source drive electrode line. The above potential is Vs; Dij represents the terminal of the TFT connected display pixel, called the drain, and the potential on Dij is Vd 'also called the pixel potential; each display pixel is configured with a semiconductor switching device - field effect on the thin film substrate A crystal (TFT) can be directly controlled by a pulse to perform a display scan, so each pixel is relatively independent. The voltage between the gate and the source of the thin film field effect transistor (TFT) is Vgs, and the voltage between the gate (ce) and the drain of the thin film field effect transistor (TFT) is ........ .... .... ::.

Vgd. The thin film field effect transistor (TFT.) has two types of NM0S type and PM0S type. At present, most of the thin film field effect transistor used in the thin film field effect transistor (TFT-LCD) adopts an amorphous silicon (a-Si) process, and the gate insulating layer is nitrogen. Silicon germanium (SiNx), which easily draws a positive charge, forms a channel in the amorphous germanium semiconductor layer, just using a positively charged germanium in tantalum nitride to help attract electrons to form a channel. Therefore, an amorphous germanium film is used. Field effect transistors (TFTs) are mostly of the NM0S type. The content of this specification is mainly described by the NM0S thin film field effect transistor. The PM0S type thin film field effect transistor can follow the principle of communication, and the description is not listed separately. [0029] The timing of the conventional display driving of the TFT-LCD liquid crystal display is as shown in FIG. 3: In the display #Display Time, the display driving circuit performs sequential scanning display on the column electrodes, row electrodes, sharing (COM) The electrode cooperates with the output of the corresponding display signal to put the display in a display state; there is a blanking period between every two display scan periods (V ertica 1 098142156 Form No. A0101 Page 10 / Total 77 Page 0993125345-0 201120844 g Time) 'In this period of time, the display does not control the display circuit to stop the column electrode scanning, and the non-selected signal of the dynamic output film field effect transistor (TFT) = (10) electrode maintains the original rounded state or some pre- Set the round signal ^ (4) The effect crystal (TFT) is off. In the present invention, the time-sharing and per-electrode technique is to use the de-emphasis time period as the time period in which the re-existing electrode is the detecting electrode. Work display

[0030] The touch circuit cooperates with (4) the display circuit and the touch circuit, so that the display electrode is connected to the display circuit, or the touch circuit is connected to the touch circuit to display the display. Drive and touch detection time-division multiplexer display electrodes. During the display period, the display electrode communicates with the display drive circuit to transmit the display drive signal. The display is in the display 痞. During the touch detection period, the display electrode is connected to the touch circuit to transmit the touch signal, and respectively detects the change of the touch signal flowing through each of the column electrode lines and each of the row electrode lines, so that the touch signal changes to a certain set condition. The column electrode line and the row electrode line are the touched electrode lines. The position of the contact is determined by the detected intersection of the touched electrode line and the touched electrode line. Embodiments 16 to 19 of the embodiments of the present invention disclose the structure of the related touch signal detecting circuit. [0031] In addition, the specific implementation manners of the first embodiment to the sixth embodiment of the present invention are examples of selecting a reasonable touch excitation signal scheme to avoid the influence of the touch excitation signal on the display effect. The tenth method proposes to avoid the display of several solutions that affect the touch. The specific embodiments 11 to 13 disclose the selection requirements of the touch excitation signal frequency. The specific implementation manners 14 and 15 disclose the touch detection. , 098142156 Form No. A0101 Page 11 / Total 77 Page 0993125345-0 201120844 Touch nickname to detect the synchronization relationship with the applied touch excitation signal Specific Besch method _ ten to twenty-three reveals a variety of single channel And multi-channel touch detection sweeping and ordering. These embodiments are improvements to the rest of the touch control path, and the use thereof does not affect the implementation of the technical solution of the present invention' without affecting the scope of protection of the present invention. [0032] The electrical connection relationship of the touch display paste using the TFT LCD as a display is as shown in FIG. The TFT-LCD display 41〇 includes a scanning column electrode 42〇 in the horizontal direction of the TFT-LCD display, and has column electrode lines 421.....42m; and a data row electrode 43〇 in the vertical direction of the TFT-LCD display, having . ...... row electrode lines 431, ..., 43n; TFT-L · common electrode layer (COM electrode) 440; thin film field effect transistor TFT 450 on TFT-LCD display Gate) is connected to the horizontal scanning column electrode line 'Source' is connected to the vertical data line electrode line, Drain is connected to the pixel electrode; the display pixel corresponding to the liquid crystal cell 460' is electrically equivalent For a capacitor, this capacitor is generally defined as CTp; storage capacitor (Capacitance Storage, Cs) ^ 470, used to store pixel display information; COM display driver circuit 480, touch excitation source for COM when touch detection state 481, COM COM signal strobe output circuit 482; column electrode display scan drive circuit 483, column electrode touch circuit (with touch excitation source and touch signal detection circuit) 484, column electrode column signal strobe output Circuit 485; display of row electrodes Feed driving circuit 486, the row electrodes of the touch control circuit (having a touch excitation source and a touch signal detection circuit) 487, column signal electrodes of the row strobe output circuit 488; a timing controller (Timing Controller) 489 and the like. The display scan driving circuit 483 and the touch control circuit 484 are connected through the column signal strobe output circuit 485. 098142156 Form No. A0101 Page 12/77 pages 0993125345-0 201120844 to the column electrode 420; the display data driving circuit 486 and the touch circuit 487 pass The line signal strobe output circuit 488 is connected to the row electrode 430; the COM display driver circuit 480 and the touch excitation source 481 are connected to the COM electrode 440 via the COM signal strobe output circuit 482. [0033] 时序 The timing controller 489 receives the RGB data, the clock signal Clock, the horizontal sync Hsync, and the vertical sync signal from the image signal processing chip to control the column display driving circuit 483 and the source connecting the gate. The display driving circuit 486 and the COM display driving circuit 480 connected to the common electrode cooperate; the column touch circuit 484 for connecting the source, the line touch circuit 487 for connecting the gate, and the COM touch excitation source 481 for connecting the common electrode cooperate. Working; and let the column strobe circuit 485, the row strobe circuit 488 and the COM signal strobe output circuit 482 in the touch display enable the display electrode or the display medium circuit to transmit the display driving signal or communicate with the touch circuit. Touch signal, display drive and touch detection time-division multiplexer display electrodes. [0034] 列 During the display period, the column strobe circuit 485, the row strobe circuit 488, and the COM signal strobe output circuit 482 in the touch display 400 respectively connect the display column electrode 420, the row electrode 430, and the COM electrode 440' The column display driving circuit 483, the row display driving circuit 486, and the COM display driving circuit 480 transmit display driving signals, and the display 410 is in a display state. [0035] During the touch detection period, the column strobe circuit 485, the row strobe circuit 488, and the COM signal strobe output circuit 482 in the touch display 400 respectively connect the display column electrode 420, the row electrode 430, and the COM electrode 440. The column touch circuit 484, the line touch circuit 487, and the COM touch excitation source 481 transmit the touch signals, and respectively detect the contacts 098142156 flowing through the column electrode lines and the respective row electrode lines. Form No. A0101 Page 13 / Total 77 pages 0993125345-0 201120844 The ''shower rides the electric (four) for the touch sensing electrode for the touch sensor 4 8 4 and the line touch circuit 4 8 7 detects the change of the touch machine number that reaches a certain The column electrode line and the row electrode line of the set condition are the touched electrode lines. The position of the touch point on the display 410 is determined by the detected touched f-polar line and the parent point of the touched electrode line. [0039] [0039] FIG. 4 illustrates the structure of a typical touch display, and the following description of specific embodiments is based on this structure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the touch display shown in Fig. 4, the timing of the display electrode time division multiplexing scheme is as shown in Fig. 5. The display time between each display is used, and the hidden time is used as the touch detection period. During this time period, the display electrode is switched to the touch sensing f pole, and the display touch excitation signal is used to detect the display electrode. Changes in touch signals. The touch excitation source is a square wave signal source having a DC bottom value or no DC bottom value. In the touch detection, the three electrodes of the Gi ' Sj and COM electrodes of the thin film field effect transistor (TFT) shown in Fig. 2 are respectively applied with the touch excitation signals as shown in Fig. 6, and the three touches are applied. The control excitation signals are square waves with a DC bottom value or no DC bottom value, and the frequencies are the same and the phases are the same. When the display electrode is switched from the display state to the touch detection state, first, the transient potential of the touch excitation signal applied by the counter electrode Gi and the electrode Sj is lower than Vgs=Vg-Vs, which is lower than the load voltage for the TFT to be in the wearing state. A is to apply a suitable touch excitation to the COM electrode and the electrode Gi. The image sensor Vd and the COM electrode potential vcom are both kept at an average value and the pixel potential Vd is in compliance with the transient state of Vgd = Vg-Vd. The potential difference is 彳 ;; = 098142156 Form No. A0101 Page 14 of 77 〇 993125345~〇201120844 [0040] ^ is in the cut-off _ cutoff „this—requires to ensure that the heart and... are lower than the film field effect transistor ( TFT) is in the off-state cut-off voltage', so that the thin-film field-effect transistor (tft) can remain effectively cut off in the touch detection state, and the display pixel voltage is maintained, so that the display effect is not affected by the touch detection. The touch excitation is selected as a square wave signal source with a DC bottom value or no money, and the frequency and phase of these square wave signal sources are the same, and the amplitude of the jump is also the same 'making the thin film field effect transistor (TFT) Gi, Sj The difference between the excitation signals applied by the three electrodes of COM is the determined DC potential. In fact, the touch detection can use a simple detection circuit to obtain a good detection effect, and the signal source is very convenient to generate. [0041] The second embodiment differs from the first embodiment in that the three touch excitation signals (as shown in FIG. 7) are applied. The frequency is different. Q [〇〇43] Embodiment 3 [0044] The difference between this embodiment and Embodiment 1 and Embodiment 2 is that the three touch excitation signals are all having a DC bottom value. Or a square wave without a DC bottom value is the same but the phases are inconsistent, as shown in Fig. 8. - [0045] DETAILED DESCRIPTION OF THE INVENTION [0046] This embodiment differs from the first embodiment to the third embodiment in that: In the touch detection, as shown in Figure 2, the three electrodes of Gi, Sj, and COM of tft are respectively applied with the touch excitation signals as shown in Fig. 9, and the three touch excitation signals applied are 098142156. Form No. A0101 No. 15 Page / Total 77 Pages 0993125345-0 20112084 No. 4 is a sine wave having a DC bottom value or no DC bottom value (note that Embodiments 1 to 3 are square waves instead of sine waves) 'the frequency is the same and the phase is the same. [0048] Embodiment 5 [0048] This embodiment The difference from the first embodiment to the fourth embodiment is that, in the touch detection, the three electrodes of the Gi ' Sj ' COM of the TFT shown in FIG. 2 are respectively applied with the touch excitation signals as shown in FIG. 10 . The three touch excitation signals are sinusoidal waves with a DC bottom value or no DC bottom value, and the frequency and phase are the same, but the amplitude of the waveform AC portion is different. .... ....... :.. .. ... ... ..........

[0049] Embodiment 6 [0050] This embodiment differs from Embodiment 1 to Embodiment 5 in that, in the touch detection, the three electrodes of Gi ' Sj ' com of the TFT shown in FIG. 2 are respectively applied as follows. In the touch excitation signal shown in Fig. 11, the combination of the excitation signals does not protect the average value of the pixel electrode potential Vd and the COM electrode potential Vcom. V , : : . '; :::: remains unchanged, but can Keeping the average value of the potential difference Vd~Vcom between the two remains unchanged, and the display effect is not affected by the touch detection. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0052] The touch display 400' display shown in FIG. 4 employs a TFT-LCD, and the TFT-LCD uses a positive liquid crystal material. The anisotropy of the dielectric constant of the liquid crystal material causes the distributed capacitance in the liquid crystal cell to vary with the arrangement of the liquid crystal molecules. The arrangement of liquid crystal molecules in the TFT-LCD depends on the effective value accumulated by the driving voltage at the same place. The effective values of the driving voltages accumulated at different positions at different times are different, the liquid crystal molecules are arranged differently, and the distributed capacitance is also different. The measurement environment is different. a TFT-LCD application drive 098142156 Form No. A0101 Page 16 of 77 201120844 [0053] When the voltage is applied, the alignment state of the liquid crystal molecules is driven by the action of the electric field ^ Tnj tends to be parallel to the direction of the electric field. A further timing of the display electrode time division multiplexing scheme is shown in FIG. , kg Display the frame blanking period between frames twice as the touch detection time & 1 In this period of time, first apply a saturated preset drive (pre-drive, Pl«e~ 〇〇driving) to all the column electrode line Sj of the display, and signal on the three electrodes of Gi, Sj and COM. As shown in Figure ι3, the touch excitation signal is a sine wave with a DC bottom value or no DC bottom value. The potential difference Vgs between Gi-Sj is in the range of -10. 5V to -l7v is lower than the cut-off voltage for letting the TFT in the cut-off cold; avoiding the influence. The potential difference Vgc between the Gi-COM is between -10. 5V and -12V, The potential difference Vsc between sj c(10) is 5V, both exceeding the saturation voltage of the liquid crystal molecules. Under the action of the applied saturation driving voltage, the liquid crystal displays the liquid crystal molecules, the row electrodes and the c〇M between the inner electrode and the COM electrode. The liquid crystal molecules of the gate of the electric core are arranged in a direction that is rapidly turned toward a direction parallel to the electric field. As shown in Fig. 14, when the electric field e is applied to the positive liquid crystal material, the alignment of the liquid crystal molecules is parallel to the alignment of the electric field direction. And applying a touch excitation signal to the display column electrode line Gi and the row electrode line Sj, respectively, and detecting changes of the touch signals flowing through the column electrode lines and the respective row electrode lines; the previous saturated pre-drive voltage makes the liquid crystal The molecular arrangement is consistent, and the variation of the distributed capacitance caused by the dielectric anisotropy of the liquid crystal material is excluded, and when the change of the touch signal on each column electrode line and each row electrode line is detected, the measurement environment at different positions at different times tends to Consistent, it is conducive to the stability and consistency of the touch detection results. [0054] When an electric field is applied to the liquid crystal, since the liquid crystal molecules are non-polar molecules, such as No. 098142156, the nickname A0101, page 17 / page 77, 0993125345-0, 201120844 14 The arrangement of the liquid crystal molecules is not affected by the positive and negative directions of the electric field. Therefore, the transient voltage on the electrode in the pre-driver phase can be positive or negative, as long as the saturation drive of the liquid crystal is maintained. Therefore, the waveform or frequency and amplitude of the pre-drive signal and the touch excitation signal applied to the display/electrode of the display can be the same. Even the pre-drive signal and the touch excitation signal are the same signal. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0056] Unlike Embodiment 7, the TFT-LCD in this example employs a negative wave material, as shown in FIG. . . . ...... .... ......

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0058] [0058] [0058] The touch display 400 shown in FIG. 4, the display adopts TFT-LCD' because the response speed of the liquid crystal display is relatively low, and it is easy to exist when displaying a high-speed screen. Image remnant, smearing, in order to solve this problem, the current solution is to increase the frame rate of the display, insert a "black frame," after the display of each black frame, and let the black frame, before blocking The residual image of the content of the display. The so-called black frame is in this frame, in the state that the TFT is on, a saturated driving electric history is applied to the display pixel electrode through the row electrode Sj, so that the alignment of the liquid crystal molecules in the display pixel is consistent with the electric field or the parallel The direction. In the case where the alignment of the liquid crystal molecules in the display pixel is uniform, the arrangement of the liquid crystal molecules between the row electrode and the COM electrode in the liquid crystal display will also be uniform. Since the column electrodes are scan electrodes, the voltage effective value on each column electrode is the same. When the liquid crystal molecules are aligned in the row between the row electrode and the COM electrode, the distributed capacitances on the column electrodes are substantially uniform. 098142156 Form No. A0101 Page 18 of 77 0993125345-0 201120844 [0059] The timing of the display electrode time division multiplexing scheme is as shown in Fig. 16. The touch excitation signal is applied to the display column electrode line Gi and the row electrode line Sj of the black building, and the change of the touch signal flowing through each of the column electrode lines and the respective row electrode lines is respectively detected. Using black ray to make the alignment of the liquid crystal molecules in a uniform 'excluding the variation of the distributed capacitance caused by the anisotropy of the dielectric constant of the liquid crystal material', when detecting the change of the touch signals on each column electrode line and each row electrode line, different positions at different times The measurement environment on the trend tends to be consistent, which is beneficial to the stability and consistency of the touch detection results. [0060] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 10 [雠] The touch display 400' display shown in FIG. 4 employs a TFT-LCD, which is the same as the embodiment IX in that 'there is also inserted after each one. A "black frame" that allows the "black frame" to block the image after the content. [0062] Unlike the ninth embodiment, the further timing of the display electrode time division multiplexing scheme is as shown in Fig. 17. Applying a touch excitation signal ' to the display column electrode line Gi and the row electrode line Sj after the normal display frame and after the black frame respectively, and detecting the touch signals flowing through the column electrode lines and the respective row electrode lines respectively The change. In this way, the t贞 blanking time between display frames is fully utilized, and the display electrodes are switched to the touch sensing electrodes in each frame blanking time; and the liquid crystal molecules are aligned in the black frame. The variation of the distributed capacitance caused by the coefficient anisotropy; comprehensive judgment - to eliminate the influence of the inconsistent alignment of liquid crystal molecules on the detection environment. 3mm。 The thickness of the glass substrate is 0. 3mm. The thickness of the glass substrate is 0. 3mm. When a person's finger touches the surface of the display, 'hand 0993125345-0 098142156 Form No. A0101 Page 19 of 77. The excitation is the sampling resistance of the touch excitation source circuit of Ms. ,, M2 卜 "Touch circuit internal touch The equivalent electric power of the display electrode of the control signal is 'four' is the display electrode of the touch sensing electrode. The second electrode is used as the touch sensing power, and the 1831 is the hand-in-disk. The light-combining capacitor 183^ of the distributed capacitance plant is the capacitance between the display electrode of the touch sensing electrode and the (10) electrode group used as the touch sensing electrode. [0065] : 9 through the substrate glass sheet and display • circuit as shown in Figure 18, forming a coupling capacitor between the jade, the n ° 181 0 county aunt & ____

Pk Μ and (4) use the discreet display electrode for the singular control electrode, the overlap visibility is below 5mm, the thickness of the substrate glass is Q. 3 coffee, the surface is > 1831 is about 10pF; for the usual TFT-LCD sampling resistor 1820 and The sum of the equivalent resistors 1821 is about 3 〇ΚΩ, and the touch signals on the display electrodes used as the touch sensing electrodes are partially from the coupling capacitors.

1831 leaks out to the finger; when the touch excitation source outputs a sine wave with vrms=5V, the relationship between the leakage current A i caused by the coupling capacitor 1831 and the frequency of the touch excitation source is as shown in Fig. 19. The frequency of the touch excitation signal has a major influence on the capacitive reactance of the coupling capacitor 1831, and the magnitude of the touch signal that the leakage current leaks from the finger is different. The frequency is too low, the coupling capacitance of the coupling capacitor 1831 is too small, and the touch display 400 is insensitive to the touch control of the touch object, and the touch leakage judgment is easily generated. The frequency selection of the touch excitation signal has a greater impact on the reliability of the touch detection, especially in the case where a protective cover is added in front of the display. It can be seen from Fig. 19 that in the actual experimental results, when the frequency of the touch excitation source is lower than ΙΟΚΗζ, the leakage current Δί is small, and the environmental noise ratio is 098142156. Form number Α0101 20th buy/total 77 pages 0993125345- 0 [0066] 201120844 is not obvious enough to distinguish, when the touch excitation source frequency is set to ΙΟΚΗζ or above, it is the reasonable circuit parameter used by the display electrode as the touch sensing electrode. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0068] The touch display 400 shown in FIG. 4 has a TFT-LCD display and a glass substrate having a thickness of 0.3 mm. When the COM electrode of the liquid crystal screen is disposed on the upper substrate glass facing the operator, the COM electrode forms a certain masking effect between the column electrode and the row electrode and the operator. A coupling capacitor is formed between the finger and the display COM, and a coupling capacitor is formed between the COM electrode and a set of display electrodes used as the touch sensing electrode. The equivalent circuit is shown in FIG. 2010 is a touch excitation source for providing a touch excitation signal to the display electrode, 2020 is a sampling resistor of the touch signal detection circuit in the touch circuit, and 2021 is a set of equivalent resistance of the display electrode used as the touch sensing electrode, 2030 It is a distributed capacitance of a set of display electrodes used as touch sensing electrodes with respect to other electrodes in the display. 2031 is a coupling capacitance between a COM electrode and a set of display electrodes used as a touch sensing electrode, and 2032 is a finger and a display COM electrode. The coupling capacitor, 2040, is the equivalent resistance between the excitation source and the COM electrode. [0069] Generally, the overlap width between the finger and a set of display electrodes used as the touch sensing electrodes is less than 5 mm, the thickness of the substrate glass is 0.3 mm, and the capacitance 2032 is approximately 10 pF; for the usual TFT-LCD The sum of the sampling resistor 2020 and the equivalent resistance 2021 is about 30 ΚΩ. When a human finger touches the surface of the touch display, due to the presence of the coupling capacitors 2031 and 2032, the touch signal on the display electrode used as the touch sensing electrode partially flows from the coupling capacitor 2031 to the COM electrode, and then from the COM electrode to the finger. Coupling 098142156 Form No. A0101 Page 21 of 77 Page 99993125345-0 201120844. The 2032 part of the electricity leaked out to the fingers. The high-frequency touch excitation signal is used to make the leakage current Δί from the coupling capacitors 2031 and 2〇32 larger, and the touch signal «(10)€ is very fresh (force) (four), which can obtain better touch detection capability. [0072] DETAILED DESCRIPTION OF THE INVENTION [13] The touch display 400' display shown in FIG. 4 employs a TFT-LCD. The anisotropy of the dielectric constant of the liquid helium material causes the distribution of electric valleys in m to vary with the arrangement of liquid crystal molecules. The arrangement of liquid crystal molecules in the TFT LCD takes the driving voltage at the same place. (IV) The effective value of the driving voltage is different at different times and at different times. The liquid crystal molecules are arranged differently. The distribution capacitance is also different. The measurement environment for touch detection is different. However, the anisotropy of the dielectric material of the liquid crystal material has a dispersion effect with frequency, and the anisotropy of the dielectric constant is generally not reflected by the electric signal of 5 〇〇 KHz or above. A touch excitation signal having a frequency of 1 MHz or more is applied to the display column electrode line Gi and the row electrode line S j , and changes in the touch signals flowing through the respective column electrode lines and the respective row electrode lines are respectively detected. Although the arrangement of liquid a/s is not uniform at different positions of the TFT_LCD, due to the anisotropic dispersion effect of the dielectric constant of the liquid crystal material, the liquid crystal material dielectric is excluded for the touch excitation signal of 1 MHz or more. When the variation of the distributed capacitance caused by the coefficient anisotropy is detected, when the change of the touch signal on each column electrode line and each row electrode line is detected, the measurement environments at different positions at different times tend to be uniform, which is favorable for the stability of the touch detection result. Sex and consistency. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Fourteen 098142156 Form No. A0101 Page 22 of 77 0993125345-0 [0073] 201120844 [0074] ❹

G The touch display 400 shown in Fig. 4 uses a TFT-LCD. In actual touch detection, the voltage signal is usually used as the detection object to measure. The equivalent circuit of the measurement is shown in Figure 18. The 1810 is a touch excitation source for providing a touch excitation signal to the display electrode, the 1820 is a sampling resistor of the touch signal detection circuit in the touch circuit, and the 1821 is an equivalent resistance of the display electrode used as the touch sensing electrode, 1830 It is a distributed capacitance of a set of display electrodes used as touch sensing electrodes with respect to other electrodes in the display. 1831 is a coupling capacitance between a finger and a set of display electrodes used as a touch sensing electrode, and 1832 is a set of touch sensing electrodes. The capacitance between the display electrode and the COM electrode is used. The 1841 is a touch signal sampling point for measuring the change of the touch signal voltage, and the 1840 is a detection reference point for measuring the change of the touch signal voltage. Here, the touch excitation source 1810 is selected. The output terminal serves as a reference point. In fact, other potential points can be selected as reference points, such as the ground of the touch circuit, the positive power terminal of the touch circuit, or the negative power terminal of the touch circuit, or the comparison circuit. A little, or another set of electrode lines on the touch screen can have a good detection effect. The touch excitation source 1810 is a square wave signal. Since the 1 830 and the 1831 are capacitive loads, the square wave signal of the touch excitation generates a charge and discharge waveform on the two capacitors. The output waveform of the touch excitation source 1810 and the touch signal waveform of the touch signal sampling point 1841 are as shown in FIG. [0075] In the embodiment, the method for detecting a touch signal uses an instantaneous value measurement method to measure the potential of the touch signal sampling point 1841 at a specific phase point, and compare the detected ones in different frame blanking periods. The change of the potential of the specific phase point is used to obtain the touch information; the specific phase point refers to a specific phase point of the waveform of the output end of the touch excitation source 1810. 098142156 Form No. A0101 Page 23 / Total 77 Page 0993125345-0 201120844 The circuit shown in Figure 18 uses the excitation source signal as the circuit source. The branch where the sampling resistor is located is 183〇 and 1831. The two capacitors are connected in parallel with 182〇 and 1821. Two resistors in series with the RC loop. During the touch detection period, a touch excitation signal is applied to the circuit shown in Fig. 18, and the circuit generates and charges a capacitor. In the 21st picture, the phase (1) is suitable for sampling. The phase interval at the touch signal sampling point is 1 and the phase interval of T1 is the time period from the start of charging to the completion of charging. The phase interval of T2 is the discharge of the capacitor to the discharge element. period. [Remuneration for each button---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Composition: display _ step, touch excitation pulse number synchronization, touch excitation waveform 4 synchronous display frame synchronization: each time the touch actuation signal is applied is $1 in the depreciation period between the two displays Fixed time: the number of excitation pulses is synchronized: from the start of applying the touch excitation signal to the display electrode used as the touch sensing electrode, the number of touch excitation signal pulses is calculated, and the time of each sampling data is in the same serial number. The number of touch excitation signal pulses; phase synchronization of the excitation waveform: each time the sample data is acquired is at a specific phase point of the waveform of the output end of the touch excitation source, and the position of the specific phase point is selected at T1 or T2. Within the phase interval. A complete synchronization process is shown in Figure 22, Figure 22, and Figure 22c. Figure 22a is a timing diagram of time division multiplexing of the display. The column electrode, the row electrode and the COM electrode of the display are in the display scanning period, and the corresponding display signals are outputted, and the display scanning is performed sequentially, and the column electrodes of the display are The row electrode and the COM electrode are in the frame blanking period ( 098142156 Form No. A0101 Page 24 / Total 77 Page 0993125345-0 201120844 Ο [0077] [0078] 〇 [0079] 098142156 0993125345-0 Η Κ and Κ ) When used in the touch detection state, the square wave touch excitation signal is applied and detected according to the detection requirement; FIG. 22b is an enlarged schematic view of the Η segment and the Κ segment (frame blanking period) in FIG. 22a, such as 22 The display electrode shown in FIG. b starts to apply the square wave touch excitation signal at the same fixed time in the frame blanking period to realize frame synchronization; FIG. 22c is the X segment in FIG. 22b (loading the excitation signal and detecting The enlarged schematic diagram of the time period) starts to apply the touch excitation signal after the frame synchronization in the display frame blanking period, and also starts counting the number of excitation signal pulses, and each sampling detection is controlled by the same serial number. Controlling the number of excitation signal pulses to achieve synchronization of the number of touch excitation pulses; in the touch excitation signal pulse, each time the sample data is acquired is at a specific phase of the waveform of the touch excitation output end, to achieve Synchronize with the touch excitation and waveform phase. The fifteenth embodiment is different from the fourteenth embodiment. The touch excitation source 1810 is a sinusoidal signal. Since the 1830 and 1831 are capacitive loads, the sinusoidal touch excitation source is charged with a capacitive load, and the touch signal is sampled. The waveform on the point is still a sine wave.....f, but the amplitude and phase change occur. The output waveform of the touch excitation source 181〇 and the touch signal waveform of the touch signal sampling point are as shown in Fig. 23. In the method for detecting a touch signal, the phase shift measurement method is used to compare the phase shift of a specific phase point of the touch signal sampling point 18 41 on different frame blanking periods to obtain touch information; A particular phase point refers to a particular phase point relative to the output of the touch excitation source 181〇. In Fig. 18, the touch excitation source signal is used as the circuit source, and the branch circuit where the sampling resistor is located is a parallel circuit in which two capacitors of 1 830 and 1831 are connected in parallel and then connected with two resistors of 182 〇 and 1821. During the touch detection period, the touch excitation signal is applied to the circuit shown in the figure No. A0101, No. 25/2011, page 201120844, and the sine wave will have a decrease in amplitude and a phase delay through the RC loop; when the finger touches the display, The coupling capacitor 1831 causes a change in C in the RC loop, and measures the change of the time difference between the zero-crossing point of the sine wave and the zero-crossing point of the output end of the touch excitation source 1810 at the touch signal sampling point to determine whether the touch occurs. Measuring the phase shift of the touch signal waveform on the touch signal sampling point can also be measured at the peak point of the sine wave or at other phase points. [0080] Again, to ensure that each detection of the touch signal is at a particular phase point relative to the waveform of the output of the touch excitation source 1810, a series of synchronization relationships need to be maintained. The synchronization relationship here consists of three synchronization relationships: display frame synchronization, touch excitation pulse number synchronization, and touch excitation waveform phase synchronization. Display frame synchronization: each time the touch actuation signal is applied is a fixed time in the frame blanking period between two display frames; the number of excitation pulses is synchronized: from the start of applying the touch excitation signal to the touch The display electrode used to control the sensing electrode starts to calculate the number of touch excitation signal pulses. Each time the sampling data is acquired, the number of touch excitation signal pulses of the same serial number is used; the excitation waveform phase synchronization: the measurement of the touch signal is measured. The specific phase point of the touch signal waveform is compared with the waveform of the output end of the touch excitation source for time comparison; the phase shift information of the sine wave is all phase, so that each time the same specific phase point is seen Just move. A complete synchronization process is shown in Figures 24 & 24, Figure 24 and Figure 24c. Figure 24 & is a timing diagram of the display time division multiplexing, the column electrode, the row electrode, and the c〇M electrode of the display are in the display scanning time period, and the corresponding display signals are outputted, and the display scanning is performed sequentially, while in the display The column electrode, the row electrode, and the c〇M electrode are multiplexed in the touch detection state during the frame blanking period (Η and K segments) of 098142156 Form No. A0101 Page 26/77 pages 0993125345-0 201120844' The sine wave excitation signal is loaded and detected according to the detection requirement, and the enlarged view of the Η segment and the K segment (the displayed frame blanking period) in Fig. 24, Fig. 24, Fig. 24, the display shown in Fig. 24b The electrode starts to apply a sine wave touch excitation signal at the same fixed time in the displayed frame blanking period to realize the synchronization of the building; FIG. 24c is the X segment in the 24th figure b (applying the touch excitation signal and detecting the time period) The enlarged schematic diagram 'after the frame synchronization in the displayed frame blanking period, the sine wave touch excitation signal is applied, and the number of touch excitation signal pulses is also calculated. Each sampling detection is controlled by the phase. The number of the excitation signal pulses of the same serial number is used to realize the synchronization of the number of excitation pulses; in this sinusoidal touch excitation signal pulse, each time the sampling data is acquired, the waveform of the touch excitation output is the same. At a certain phase point to achieve synchronization with the phase of the touch excitation waveform - 〇 [0081] Embodiment 16 [0082] The fourteenth embodiment and the fifteenth method are all using the instantaneous value measurement method The touch monitor 400 of FIG. 4 performs touch detection. This instantaneous value measurement method detects the touch signal in a very short period of time at a specific phase point, and its main feature is that the detection speed is fast. Realizing instantaneous value measurement The three circuit configurations of touch signal detection are shown in Figure 25, Figure 26 and Figure 27. The structure of the touch signal detection circuit is composed of a signal detection channel, a data sampling channel, and a data processing and timing control circuit. The signal detection channel has a buffer, a first-stage differential amplifying circuit and a second-stage differential amplifying circuit; the data sampling channel has an analog-to-digital conversion circuit; the data processing and timing control circuit has a data computing capability, a data output input interface 098142156, a form number A0101 Page 27 of 77 Page 0993125345-0 201120844 The 'Central Processing Unit (CPU, MCU)' central processing unit has control software and data processing software. [0083] FIG. 25 is a structural diagram of a touch signal detecting circuit of an instantaneous value measuring method, 2510 is a signal of a touch signal sampling point, 2511 is a signal for detecting a reference point, a signal 2510 of a touch signal sampling point, and The signal 2511 for detecting the reference point is buffered by the buffer 2520 and the buffer 2521, respectively, as an input signal of the first stage differential amplifier 2522; the output of the first stage differential amplifier 2522 is used as one of the inputs of the second stage differential amplifier 252 3 , 2524 is the regulated voltage output, which is used as the pseudo potential, and is connected to the second stage differential amplifier 2523. The other input ' is used to subtract the bottom value of the output signal of the first stage differential amplifying circuit; the second stage differential amplifier 2523 outputs to The analog digital converters 2525, 2525 are synchronously sampled under the control of the synchronous control signal 2530 outputted by the central processing unit (CPU, MPU) 2526, and the sampled conversion result is sent to the central processing unit (CPU, MPU) 2526, and then processed by the central processing. Data processing and touch judgment. [0084] FIG. 26 is a structural diagram of a touch signal detecting circuit of an instantaneous value sensing method, 2610 is a signal dance of a touch signal sampling point, 2611 is a signal for detecting a reference point, and a signal 2610 of a touch signal sampling point and The signal 2611 of the detection reference point is buffered by the buffer 2620 and the buffer 2621, respectively, as the input signal of the first stage differential amplifier 2622; the output of the first stage differential amplifier 2622 is used as one of the inputs of the second stage differential amplifier 2623. The feedback adjustment analog circuit 2624 uses the output of the second stage differential amplifier 2623 as a feedback input signal and automatically adjusts the output voltage, which serves as a reference potential and is connected to the other input of the second stage differential amplifier 2623 for subtracting the first stage difference. The bottom value of the output signal of the amplifying circuit; the second stage 098142156 Form No. A0101 Page 28 of 77 0993125345-0 201120844 The output of the differential amplifier 2623 is output to the analog converter 2625, 2625 at the central processing unit (CPU, MPU) 2626 Simultaneous sampling under the control of the synchronization control signal 2630 'Sampling conversion result is sent to the central processing unit (CPU ' MP U) 2626, and then the central processing unit for data processing and touch judgment. [0085] ο ο Figure 27 is a structure of the touch signal detection circuit of the instantaneous value measurement method. 2710 is the signal of the touch signal sampling point, and 2711 is the signal for detecting the reference point signal of the touch signal sampling point. 2710 and the detection reference point signal 2711 are buffered by the buffer 2720 and the buffer 2721, respectively, as the input signal of the first stage differential amplifier 2722; the output of the first stage differential amplifier 2722 is used as one of the second stage differential amplifiers 2723. Input 'Central Processing Unit (CPU, MPU) 27:26 board according to the touch operation result to send the adjustment data to the analog converter of the digital analog converter 2724, 2724 as the reference potential, connected to the other input of the second stage differential amplifier 2723, The bottom value of the output signal of the first stage differential amplifying circuit is subtracted; the second stage differential amplifier 2723 is output to the analog digital converter 2725, 2725 under the control of the synchronous control signal 2730 outputted by the central processing unit (CPU, MPU) 2726. Simultaneous sampling, the sampling conversion result is sent to the central processing unit (CPU, MPU) 2726, and then the central processing unit performs data processing and touch Off. [0086] The difference between the three kinds of instantaneous value measurement touch signal detecting circuits shown in FIG. 25, FIG. 26, and FIG. 27 is that the scheme shown in FIG. 25 is a manual method for setting a reference potential to the second differential circuit. The basic differential regulation circuit has the basic adjustment capability; the scheme shown in Fig. 26 is that the output signal of the secondary differential circuit is fed back to the secondary differential circuit via the analog circuit as the base 098142156. Form No. A0101 Page 29 of 77 Page 0993125345-0 201120844

The quasi-potential has the ability to adjust the automatic tracking of the two-way I-eight I-knife circuit; the scheme shown in Figure 27 is the feedback of the spleen towel hanging circuit. The result of the processor operation is converted by digital-to-analog to the circuit as the reference potential. 'The ability to adjust the secondary differential electric /, has #慧化. The 5-inch and resolution display, the resistance of the electrode is generally on the connection point between the 2Κα detection circuit and the electrode line on the touch wire, and the touch signal is shunted due to the detected wheel-in impedance. The input impedance of the detection circuit is larger. 'The smaller the shunting effect on the touch signal. When the detection circuit has a wheel impedance of 2.5 times or more, the touch signal can reflect the touch action

Therefore, the input impedance of the signal detection channel to the electrode line is required to be 5 κ Ω or more. As shown in Fig. 25, 26, 2, a buffer is added between the connection point of the differential amplifier circuit and the touch screen electrode line. It is to increase the input impedance of the detection circuit. 098 098 098 098 098 098 098 098 098 098 098 098 098 具体 具体 具体 具体 具体 具体 具体 具体 具体 具体 具体 具体 具体 十四 具体 具体 十四 十四 十四 十四 十四 十四 十四 十四 十四 十四 十四 十四 十四 十四 十四 十四 平均值 平均值 平均值 平均值 平均值 平均值The detection of the touch signal is performed within a predetermined time period. The average value of the touch signal is obtained as the measurement result I. The average measurement method is slower than the instantaneous value measurement method, but its main feature is that it can eliminate some of the high-frequency interference' measurement data is more stable and favorable for touch judgment. The effective knives are the two circuit configurations of the average value of the average value of the shaft control signal = as shown in Fig. 28, Fig. 29, and Fig. The structure of the control signal detection circuit is composed of a signal detection channel, a data shirt, a track, a data processing and a timing control circuit. The detection detection pass = buffer, the first stage differential amplification circuit, the RMS measurement circuit and the first form No. 1010101 Page 30/77 pages 0993125345-0 201120844 Class differential amplifier circuit; data sampling channel has analog-to-digital conversion circuit; data processing and timing control circuit is a central processing unit (CPU, data processing input interface) MCU), the central processing unit has control software and data processing software. [0089] ❹ ❹ Figure 28 shows a structure of the touch signal detection circuit of the average value measurement method. '2810 is the signal of the touch signal sampling point' 2811 is the signal for detecting the reference point 'touch signal sampling point The signal 2810 and the signal 2811 for detecting the reference point are buffered by the buffer 282 and the buffer 2821, respectively, as the input signal of the first stage differential differential amplifying circuit unit 2822; the first stage differential differential amplifying unit 2022 contains the frequency The strobe circuit, the strobe frequency of the strobe circuit is the frequency of the excitation source touch signal, and the output of the differential amplification is strobed and the strobed output is used as the input of the RMS converter 2823, and the effective value of the 2823 is output. As an input of the second stage differential amplifier 2824; 2825 is a regulated voltage output 'which serves as a reference potential and is connected to the other input A terminal of the second stage differential amplifier 2824 for subtracting the bottom value of the effective value output signal of 2823; The second stage differential amplifier 2824 outputs to the analog digital converter '2826, 2826 which is controlled by the synchronous control signal 2830 outputted by the central processing unit (CPU, MPU) 2827. Conversion result of the sampling, the sample is sent to a central processing unit (CPU, MPU) 2827 'further data processing and touch determination by the central processor. [0090] FIG. 29 is a structural diagram of a touch signal detecting circuit of an average value measuring method, 2910 is a signal of a touch signal sampling point, and 2911 is a signal for detecting a reference point of a touch signal sampling point 2 91 〇 and the detection reference point signal 2911 is buffered by the buffer 2920 and the buffer 2921, respectively, as the first stage differential differential amplifying circuit unit 2922 rounding signal; first 098142156 form number A0101 page 31 / a total of 77 pages 0993125345 -0 201120844 differential differential amplifier circuit unit 2922 contains a frequency strobe circuit. The strobe frequency of the strobe circuit is the frequency of the excitation source touch signal, which strobes the output of the differential amplification, and the output after strobing is used as The input of the rms converter 2923, the rms output of 2923 is the input of the second stage differential amplifier 2924; the feedback adjustment analog circuit 2925 uses the output of the second stage differential amplifier 2924 as the feedback input signal and automatically adjusts the output voltage as a reference. a potential connected to the other input of the second stage differential amplifier 2924 for subtracting the bottom value of the effective value output signal of 2923; The stage differential amplifier 2924 outputs to the analog-to-digital converter 2926, and the 2926 performs synchronous sampling under the control of the synchronous control signal 2930 outputted by the central processing unit (CPU, MPU) 2927, and the sampled conversion result is sent to the central processing unit (CPU, MPU). 2927, then the central processing unit for data processing and touch judgment. [0091] FIG. 30 is a structural diagram of a touch signal detecting circuit of an average value measuring method, 3010 is a signal of a touch signal sampling point, 3011 is a signal for detecting a reference point, and a signal 3010 of a touch signal sampling point is The signal 3011 of the detection reference point is buffered by the buffer 3020 and the buffer 3021, respectively, as an input signal of the first-stage differential differential amplifying circuit unit 3022; the first-stage differential differential amplifying circuit unit 3022 includes a frequency strobing circuit, and the strobe The strobe frequency of the circuit is the frequency of the excitation source touch signal, and the output of the differential amplification is gated, the strobed output is used as the input of the rms converter 3023, and the RMS output of 3023 is used as the second stage differential amplifier. 3024 input; central processing unit (CPU, MPU) 3027 sends the adjustment data to the digital analog converter 3025, 3025 according to the touch operation result as the reference potential, connected to the second stage differential amplifier 3024 098142156 Form No. A0101 32 pages / a total of 77 pages 0993125345-0 201120844 Another input, used to subtract the effective value of 3023 output signal bottom value 'first level The differential amplifier 3024 outputs to the analog-to-digital converters 3026, 3026 for simultaneous sampling under the control of the synchronous control signal 3030 outputted by the central processing unit (CPU, MPU) 3027, and the sampled conversion result is sent to the central processing unit (CPU, MPU) 3027. Then, the central processor performs data processing and touch judgment, [0092] Ο The difference between the three average measurement touch signal detection circuits shown in Figs. 28, 29, and 30 is: Figure 28 The scheme is a manual method to set a reference potential for the secondary differential circuit, and has basic adjustment capability for the second differential circuit; the scheme shown in FIG. 29 is that the output signal of the secondary differential circuit is fed back to the second by the analog circuit. The differential circuit as the reference potential 'has the ability to adjust the automatic tracking of the second differential circuit; the scheme shown in Fig. 30 is to return the result of the central processor operation to the second differential circuit as the reference potential through the digital-to-analog conversion circuit. The sub-differential circuit has intelligent adjustment capabilities. [0093] 豸 Display of different sizes and resolutions: the resistance of the electrodes is generally 2Κ

:s : Mu 4.. I on the connection point between the detection circuit and the touch screen electrode line, the touch signal is shunted due to the input impedance of the detection circuit, and the input impedance of the detection circuit is larger, the shunt of the touch signal The smaller the effect is, "When the input impedance of the detection circuit is 2.5 times or more, the touch signal can reflect the touch action information." Therefore, the input impedance of the signal detection channel to the electrode line is required to be 5K Ω or more. 28, 29, 30 add a buffer between the differential amplifier circuit and the connection point of the electrode line on the touch screen to increase the input impedance of the detection circuit. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 18 098142156 Form No. A0101 Page 33 / Total 77 True 0993125345-0 [0094] 201120844 [0096] [0097] In the introduction of the fourteenth embodiment, we are obsessed with four cabinet secrets _ X ] 杈To the touch display 400 in Fig. 4, the display adopts TFT~LCD, and the equivalent circuit of the shift is shown in Fig. 18. The touch excitation source 1810 is a square wave signal. Since the 183 〇 and 1831 are valley loads, the touch-activated square wave signal has a charge and discharge waveform on the two capacitors. The touch signal waveform of the touch excitation ray 1G and the touch signal waveform of the touch signal sampling point 1841 are as shown in Fig. 21. For the purpose of explaining the present embodiment, the 21st icon number is now re-displayed as shown in Fig. 31. In this embodiment, the time characteristic measurement method is adopted for the detection method of the touch signal, and the change of the time interval between two predetermined potentials during the charging and discharging of the touch signal sampling point 1 8 41 is measured to obtain the touch information. As shown in Fig. 31, the time τ4 2 3 between two predetermined potentials V 4 2 2 and V 4 21 during charging of the touch signal sampling point 1 841 is measured, and two predetermined potentials V421 and V422 during discharge. The time between time T424 can reflect this change in capacitive load. When the finger touches the display, the coupling capacitor 1831 of the equivalent circuit of Fig. 18 produces a change in the capacitive load of the circuit and the time constant, and the time intervals T423 and T424 between the two predetermined potentials also change. The information of the touch can be obtained by measuring the change of the time interval T 4 2 3 4 g 4 , and the predetermined potentials V421 and V422 select two potentials of the sampling point 1841 during the charging and discharging process. The circuit structure for realizing the time characteristic measurement touch signal detection is as shown in Figs. 32 and 33. The structure of the touch signal detection circuit is composed of signal detection and data sampling channels, data processing and timing control circuits. The signal detection and data sampling channel has a buffer, a digital-to-analog conversion circuit or a voltage-regulating output unit, a comparator, and a counter; the data processing and timing control circuit is a central processing unit having a data computing capability and a data output input interface. 098142156 Form No. A0101 34 pages / a total of 77 pages 0993125345-0 201120844 processor (CPU, MCU), the central processing unit with control software, data processing software. [0098] FIG. 3 is a structural diagram of a touch signal detecting circuit of a time characteristic measuring method, 3210 is a signal of a touch signal sampling point, and 3211 is a predetermined potential (V421), which is generated by a voltage adjusting output unit 3220, 3212 is a predetermined potential (V422) generated by the voltage adjustment output unit 3221; the signal 3210 of the touch signal sampling point is buffered and outputted through the buffer 3230, and compared with the predetermined potential of 3211 to enter the comparator 3232; the touch signal sampling is performed. The signal 3210 of the point is buffered and outputted through the buffer 3231, and is compared with the predetermined potential of 3212 into the comparator 3233; the central processing unit (CPU, MC103235 generates the counting pulse signal 3240 of the counter 3234, and the output of the comparator 3233 is also made; The start signal of the counter 3234, the output potential of the comparator 3232 is used as the stop count signal of the counter 3234, and the counter 3234 stops reading after counting. The number is read by the central processing unit (CPU, MCU) 3235. After the central processor (cpu, MCU) 3235 sends a clear signal 3., 241 clears the counter 3234, ready for the next reading and: by The central processing unit (cpu, MCU) 3235 performs data processing and touch judgment. [0099] FIG. 3 is a structural diagram of the touch signal detecting circuit of the time characteristic measuring method, and the 3310疋 touch signal sampling point The signal, the central processing unit (cpu, MCU) 3327 outputs the corresponding data to the digital analog converter 3320 through a program preset or history detection to output a predetermined potential mu (M21), and also outputs the data to the digital analog converter 3321 to output an established signal. Potential 3312 (V422); the signal 331 of the touch signal sampling point is buffered and outputted through the buffer 3322, and enters the comparator 3324 with the predetermined potential of 3311; 098142156 Form No. A0101 Page 35 / Total 77 Page 0993125345-0 201120844 Touch The signal 3310 of the signal sampling point is buffered by the buffer 3323, and enters the comparator 3325 with the predetermined potential of 3312. The central processing unit (CPU, MCU) 3327 generates the counting pulse signal 3330 of the counter 3326, and the output potential of the comparator 3325. As the start count signal of the counter 3326, the output potential of the comparator 3324 is used as the stop count signal of the counter 3326; the counter 3326 stops the reading after the count It is read by the central processing unit (cpu, MCU) 332 7. After the reading is completed, the central processing unit (cpu, MCU) 3327 sends the clearing signal 3331 to clear the counter 3326, ready for the next reading, and is damaged by the central central Processor (CPU, MCU) 3327 .... : : . Data processing and touch judgment, [0100] The difference between the two types of daytime feature measurement touch signal detection shown in Fig. 32 and Fig. 33 is The scheme shown in Figure 3 is a manual method to set two preset potentials V421 and V422 to the comparator; the scheme shown in Figure 33 is to set the two predetermined potentials V421 and V422 to the comparator by the central processing unit, the central processing unit. After the program is preset or the previous measurement result is calculated, the corresponding data is output to the digital-to-analog conversion circuit, and the output is made to "go to the comparison potential, and the adjustment of the predetermined comparison potentials V421 and V422 is intelligent." [0101] Embodiment 19 [0102] Unlike Embodiment 18, in this example, the touch excitation source 1810 is a sinusoidal signal 'Because the 1830 and 1831 are capacitive loads' sinusoidal touch excitation source with capacitive load After that, the waveform on the touch signal sampling point is still a sine wave 'but the amplitude and phase change occur'. The output waveform of the touch excitation source 181〇 and the touch signal waveform of the touch signal sampling point 1841 are as shown in FIG. Show. 098142156 Form No. A0101 Page 36 / Total 77 Page 0993125345-0 201120844 [0103] This embodiment uses a phase shift measurement method for the touch signal detection method to compare touch signal sampling points on different frame blanking periods 丨8 4 The phase shift of a specific phase point is used to obtain touch information. It can be seen that the influence of the touch capacitance can be reflected by the change of the measured phase, and the phase change can also be reflected from the measurement time interval. The detection diagram of this time interval is also shown in Fig. 23, and the display has no finger touch. When the distributed capacitance 1830 in FIG. 18 exists, the touch signal waveform on the touch signal sampling point 1841 is detected to have a phase delay relative to the waveform of the touch excitation source output terminal 184〇; when the finger touches the display, the 18th The coupling capacitor 1831 of the equivalent circuit shown in the figure will be generated, and the capacitance load of the circuit will increase. The time T500 between the zero-crossing point on the touch signal sampling point 1841 and the zero-crossing point between the excitation sources will become larger, that is, Produce a phase shift of the step. Touch information can be obtained by measuring the change in time T5G0. Depending on the touch excitation - source waveform difference, the potential corresponding to a particular phase point can be zero or other potential point. I L , 1 [0104] The circuit structure for realizing the phase shift measurement touch signal detection is as shown in FIG. 34 and FIG. The _ signal system structure is composed of signal detection and data sampling channels, data processing and timing control circuits. The signal detection and data sampling channel has a buffer, a digital-to-analog conversion circuit or a voltage-regulating output unit, a comparator, and a counter; the data processing and timing control circuit is a central processing unit with data computing capability and data wheel-in interface ( CPU ' MCU ), the central processing unit has control software and data processing software. [0105] FIG. 4 is a structural diagram of a touch signal detecting circuit of a phase shift characteristic measuring method, 3410 is a signal of a touch signal sampling point, and 3411 is a signal of a detecting reference point 098142156 form nickname A0101 0993125345-0 201120844' 341 2 is a potential corresponding to a specific phase point generated by the voltage adjustment output unit 342 ;; the signal 341 触控 of the touch signal sampling point is buffered and outputted through the buffer 3430, and the potential corresponding to the specific phase point of 3412 enters the comparator. 3432 compares; the signal 3411 of the touch signal sampling point is buffered and outputted through the buffer 3431, and the potential corresponding to the specific phase point of 3412 enters the comparator 3433 for comparison; the central processing unit (CPU, MCU) 3435 generates the count of the counter 3434. The pulse signal 3440, the output potential of the comparator 3433 is used as the start count signal of the counter 3434, the output potential of the comparator 3432 is used as the stop count signal of the counter 3434; the counter 3434 counts the stop reading by the central processing unit (CPU, MCU) ) 3435 read, after the reading is completed, the central processor (CPU, MCU) 3435 sends out the clear signal 3441, please zero counter 3434 Ready for the next readings by the central central processor (CPlJ, MCU) 3435 perform data processing and touch determination. [0106] FIG. 3 is a structure diagram of a touch signal detecting circuit of a phase shift characteristic measuring method, '3510 is a signal of a touch signal sampling point, and 3511 is a signal for detecting a reference point 'CPU (CPU, MCU) 3526 The corresponding data is output to the digital analog converter 3520 according to the program preset or the history detection judgment, and the potential 3512 corresponding to the specific phase point is the output potential of the digital analog converter 3520; the signal 3510 of the touch signal sampling point is buffered by the buffer 3521 The output 'the potential corresponding to the specific phase point of 3512 enters the comparator 3523 for comparison; the signal 3511 of the touch signal sampling point is buffered and outputted through the buffer 3522, and the potential corresponding to the specific phase point of 3512 enters the comparator 3524 for comparison; The processor (CPU, MCU) 3526 generates the counter pulse signal 3530 of the counter 3525, the input of the comparator 3524 098142156, the form number A0101, the 38th page, the total 77 page, the 0993125345-0 201120844, the potential as the counter 3525, the start count signal, compare The output potential of the device 3523 is used as the stop count signal of the count benefit 3525; the counter 3525 counts the read after the stop The central processing unit (cpu, MCU) 3526 reads, after the reading is completed, the central processing unit (CPU, Mcu) 3526 sends a clear signal 3531 clearing counter 3525, ready for the next reading, and is controlled by the central processing unit ( CPU, MCU) 3526 for data processing and touch determination 〇 [0107] The difference between the two phase shift measurement touch signal detections shown in Figures 34 and 35 is that the scheme shown in Figure 34 is manual. The method sets the potential corresponding to a specific phase point; the solution shown in FIG. 5 is that the central processor sets the potential corresponding to the specific phase point through the digital analog converter, and the central processor calculates the previous measurement result or calculates the previous measurement result. The digital analog converter feeds back the potential corresponding to the specific phase point, and has intelligent adjustment capability for the setting of the specific phase point. [0108] The touch signal phase-sliding feature measured in this embodiment is also a kind of time characteristic. [0109] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT [0110] The touch display 4 shown in FIG. 4, the time division multiplexed display electrode to complete the touch function. The touch display device 4 uses a part or all of the N display electrode lines to divide and operate the touch sensing electrode lines, and performs touch detection in a single channel sequential scanning detection mode: the touch signal detecting circuit has a touch signal Detecting a channel or a data sampling channel, sequentially detecting the first one and the second one of the N touch sensing electrode lines in a scanning manner, until the last Nth touch sensing electrode line, thereby completing A 098142156 Form No. A0101 Page 39 / 77 Page 0993125345-0 201120844 The entire detection process of the probe frame, as shown in Figure 36. [0111] This is also the most common and natural touch detection method. [0112] Embodiment 21 [0113] Different from Embodiment 20, in this example, the first electrode of the N touch sensing electrodes is detected by scanning at a predetermined interval i, i + Ι, 2i + l..... until the last Nth touch sensing electrode line, thus completing the entire detection process of a sounding frame. [0114] When i=2, a schematic diagram of the detection scan of a touch sensing electrode line is shown in FIG. [0115] Embodiment 22 [0116] Different from Embodiments 21 and 22, this example uses a single channel coarse sweep and fine sweep detection method for touch detection: touch signal detection circuit Having a detection channel or a data sampling channel, the touch sensing electrode line is divided into several zones according to each i-zone, and one or more touch sensing electrode lines are selected as the zone touch sensing electrode wire for each zone The touch sensing represents the touch detection together with the electrodes. The best method is to connect all the touch sensing electrodes in each partition in parallel as a touch sensing representative electrode; firstly, the touch sensing representative electrodes are detected by the area to determine The area where the touch action occurs; then the subdivision scan detection is performed in the area where the touch action occurs, thereby obtaining more specific touch information. The purpose of this method is to save time in touch detection. [0117] When i=3, the detection scan of the single-channel coarse sweep plus fine sweep is as shown in FIG. 38. 0993125345-0 098142156 Form No. A0101 Page 40 of 77 201120844 [0118] Embodiment 23 [0119] This example performs touch detection by using a multi-channel sequential scanning detection method: the touch signal detecting circuit has multiple The touch signal detecting channel and the plurality of data sampling channels divide the touch sensing electrode line of the whole Zou into the same number of groups as the touch signal detecting channel, and each touch signal detecting channel is responsible for one touch sensing electrode group Detection. [0120] One solution is that each touch signal detection channel simultaneously performs a sequential scan detection in the respective groups to "detect the detection results of all the touch signal detection channels" to obtain a full-screen touch thief. Figure 39 is a schematic diagram of the scanning sequence when three touch signal detection channels are used. [0121] Another scheme is to perform interval scan detection in the respective groups of the imaginary signals and to separate the detection results of all the touch signal detection channels, and obtain the touch information of the full screen. Figure 40 Wins a touch signal Schematic diagram of the scanning sequence when detecting channels. [0122] In another embodiment, each of the touch signal transduction channels is simultaneously subjected to coarse scanning and fine scanning in each group, and the detection results of all the touch signal detection channels are integrated to obtain the full secret control information. Figure 41 is a schematic diagram of the scanning sequence when three touch signal detection channels are used. The above description is by way of example only and not as a limitation. Any equivalents or modifications made without departing from the spirit and scope of the present invention should be included in the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a typical structural view of a W-LCD display of the present invention; FIG. 2 is a schematic structural view of a display sub-pixel of m-(10) of the present invention 098142156 Form number surface 41 77 M 〇 993125345-0 201120844 FIG. 3 is a timing diagram of a conventional display driving of the TFT-LCD liquid crystal display of the present invention; FIG. 4 is a structural diagram of a touch display of the TFT-LCD display of the present invention; The timing diagram of the time-division multiplexed display electrode of the present invention; FIG. 6 is a waveform diagram of the touch excitation signal according to the first embodiment of the present invention; FIG. 7 is a touch diagram of the second embodiment of the present invention. FIG. 8 is a waveform diagram of a touch excitation signal according to a third embodiment of the present invention; FIG. 9 is a waveform diagram of a touch excitation signal according to a fourth embodiment of the present invention, and FIG. 10 is a waveform diagram of The touch excitation signal waveform diagram of the fifth embodiment of the present invention; FIG. 11 is a waveform diagram of the touch excitation signal according to the sixth embodiment of the present invention; FIG. 12 is a seventh embodiment of the present invention. of FIG. 13 is a waveform diagram of a touch excitation signal according to a seventh embodiment of the present invention; FIG. 14 is a molecular arrangement of a positive liquid crystal material in an external field according to the present invention; Figure 15 is a sequence diagram of the molecular arrangement of the negative liquid crystal material in the external field of the present invention; 098142156 Form No. A0101 Page 42 of 77 0993125345-0 201120844 Figure 16 is a specific embodiment of the present invention FIG. 17 is a timing diagram of a time-division multiplexed display electrode according to a tenth embodiment of the present invention; FIG. 18 is an equivalent circuit diagram of the finger touch display of the present invention; Figure 19 is a graph showing the leakage current Δi of the touch signal generated by the touch of the present invention as a function of frequency; Figure 20 is the equivalent of the finger when the COM electrode of the present invention is placed on the upper substrate glass when the finger touches the display Figure 21 is a touch signal waveform diagram of the touch excitation source and the touch signal sampling point when the touch excitation signal of the present invention is a square wave; the 22a, 22b, 22c diagrams are The schematic diagram of the complete synchronization process of the touch detection when the touch excitation signal of the invention is a square wave; and the touch of the touch excitation source and the touch signal sampling point when the touch excitation signal of the invention is a sine wave Signal waveform diagram; 24a, 24b, and 24c are schematic diagrams of a complete synchronization process of touch detection when the touch excitation signal of the present invention is a sine wave; FIG. 25 is a touch signal of the instantaneous value measurement method of the present invention. FIG. 26 is a structural diagram of a touch signal detecting circuit of the instantaneous value measuring method of the present invention; FIG. 27 is a structural diagram of a touch signal detecting circuit of the instantaneous value measuring method of the present invention; The figure is a structural diagram of the touch signal detecting circuit of the rms measuring method of the present invention; FIG. 29 is a touch signal detecting circuit 098142156 of the rms measuring method of the present invention. Form No. A0101 Page 43 of 77 0993125345- 0 201120844 structure diagram; FIG. 30 is a structural diagram of the touch signal detection circuit of the rms measurement method of the present invention; FIG. 31 is a square wave of the touch excitation signal of the present invention, and the touch signal sampling point is The time characteristic of the touch signal; FIG. 3 is a structural diagram of the touch signal detecting circuit of the time feature measuring method of the present invention; and FIG. 33 is a structural diagram of the touch signal detecting circuit of the time characteristic measuring method of the present invention; Figure 34 is a structural diagram of a touch signal detecting circuit of the phase shift measuring method of the present invention; Figure 35 is a structural diagram of a touch signal detecting circuit of the phase shift measuring method of the present invention; A schematic diagram of the detection sequence of the touch detection mode of the single channel sequential scanning; FIG. 37 is a schematic diagram of the detection sequence of the touch detection mode of the single channel interval scanning of the present invention; FIG. 38 is a single channel coarse sweep and fine sweep of the present invention. The touch detection mode detection sequence is not intended, and the third figure is a schematic diagram of the detection sequence of the touch detection mode of the multi-channel sequential scan of the present invention; FIG. 40 is the touch detection mode detection of the multi-channel interval scan of the present invention. The sequence diagram is shown in FIG. 41; and FIG. 41 is a schematic diagram of the detection sequence of the multi-channel coarse sweep and fine sweep touch detection method of the present invention. [Description of main component symbols] Form No. A0101 098142156 Page 44 of 77 0993125345-0 201120844 [0125] 1, 2, 3, 4, N-1, N, i + 1, 2i + l, N+1, N + 2, N + 3, N + Q, N + Ql, N + Q-2, 3N, 3N-1, 3N-2: detection scan number f. 100 : TFT-LCD display; 110 : TFT liquid crystal screen; 120: The liquid crystal screen scans the column electrodes horizontally; 121, 122, 12m-1, and 12m: scan electrode lines (column electrode lines); 130: liquid crystal screen vertical direction data row electrodes; 131 and 13n: data electrode lines (row electrode lines) 〇140: common electrode (COM electrode); 150: thin film transistor TFT on liquid crystal screen; 160: liquid crystal molecular box corresponding to display pixel; 170: storage capacitor; 180: common electrode voltage source; 181: TFT-LCD Gate electrode; 182: TFT-LCD source electrode (row electrode) driver; 183: timing controller; 〇^400: touch display; 410: TFT-LCD display; 420: TFT-LCD display horizontally Scanning column electrode; 421 42m: row electrode line; 430: data line electrode of vertical direction of TFT-LCD display; 431 and 43η: line Electrode wire; 440: common electrode layer of TFT-LCD display (COM electrode); 450: thin film field effect transistor TFT on TFT-LCD display; 460: liquid crystal cell corresponding to display pixel; 098142156 Form No. A0101 Page 45/ 77 pages 0993125345-0 201120844 470: storage capacitor; 480: COM drive display drive circuit; 481: touch excitation source; 482: COM signal strobe output circuit; 483: column electrode display scan drive circuit; 484: column Touch circuit of electrode; 485: column signal strobe output circuit of column electrode; 486: display data drive circuit of row electrode; 487: touch circuit of row electrode; 488: line signal strobe output circuit of row electrode; 489 : timing controller; 1810: touch excitation source; 1 820: sampling resistance; 1821: equivalent resistance; 1830: distributed capacitance; 1831: coupling capacitance; 1 832: capacitance between display electrode and COM electrode; 1840: detection Reference point; 1841: signal sampling point; 2020: sampling resistance; 2 0 21 : equivalent resistance; 2030: distributed capacitance; 2031: coupling capacitor; 2032: coupling capacitor; 2040: equivalent resistance; 2510: touch Signal number of the sampling point; 098142156 Form number A0101 Page 46/77 pages 0993125345-0 201120844 2511: Signal for detecting the reference point; 2520 and 2521: Buffer; 2522: First stage differential amplifier; 2523: Second stage difference Amplifier; 2524: regulated voltage output; 2525: analog digital converter; 2526: central processing unit; 2530: synchronous control signal; 2610: touch signal sampling point signal; 2611: detection reference point signal; 2620 and 2621: buffer 2622: first stage differential amplifier; lying 2623: second stage differential amplifier; 1 2624: analog circuit; 2625: analog digital converter; 2626 · · central processing unit; 2630: control signal; 2710: touch signal sampling Point signal; 2711: signal for detecting reference point; 2720 and 2721: buffer; 2722: first stage differential amplifier; 2723: second stage differential amplifier; 2724 and 2725: analog digital converter; 2726: central processing unit; 2730: synchronous control signal; 2810: signal of touch signal sampling point; 098142156 form number A0101 page 47/77 page 0993125345-0 201120844 2811: detection reference point 2820 and 2821: buffer; 2822: first stage differential differential amplifier unit; 2823: converter; 2824: second stage differential amplifier; 2825: regulated voltage output; 2826: analog digital converter; 2827: central Processor; 2830: synchronous control signal; 2910: signal for touch signal sampling point; 2911: signal for detecting reference point; 2920 and 2921: buffer; 2922: first stage differential differential amplifier unit; 2923: RMS conversion 2924: second stage differential amplifier; 2925: feedback adjustment analog circuit; '2926: analog digital converter; 2927: central processing unit; 2930: synchronous control signal; 3010: touch signal sampling point signal; 3011: detection Reference point signal; 3020 and 3021: buffer; 3022: first stage differential differential amplifier unit; 3023: rms converter; 3024: second stage differential amplifier; 3025: digital analog converter; 098142156 form number A0101 48 pages/total 77 pages 0993125345-0 201120844 3026: analog to digital converter; 3027: central processing unit; 3030: synchronous control signal; 3210: touch signal The signal samples; 3211: given potential (V421); 3212: given potential (V422); 3220 and 3221: the voltage regulator output unit; 3231: a buffer; 3232 and 3233: comparator;

3234: counter; 3235: central processing unit; 3241: clear signal; 3310: signal of touch signal sampling point; 3311: set potential (V421); 3312: set potential (V422); 3320 and 3321: digital analog converter Plants 3322 and 3323: buffers; 3324 and 3325: comparators; 3326: counters; 3327: central processing unit; and 3331: clearing signals. 0993125345-0 098142156 Form No. A0101 Page 49 of 77

Claims (1)

201120844 VII. Patent application scope: 1. A touch display capable of eliminating touch-sensitive display, comprising an active display, a display driving circuit, a touch circuit, and a display electrode for display driving and touch a display/touch signal strobe output circuit or a display/touch signal loading circuit; the touch circuit has a touch excitation source and a touch signal detection circuit; the display/touch signal strobe output The circuit connects a display electrode or a display driving circuit to transmit a display driving signal, or communicates with a touch circuit to transmit a touch signal, a display driving and a touch detecting time-division multiplex display electrode; the display/touch signal carries The input circuit causes the display electrode to simultaneously transmit a display driving signal and a touch signal, and the display driving and the touch detecting share the display electrode at the same time; having an active device array and connecting the active on a substrate of the active display a row of electrode sets and a row of electrode sets of the device array having a common on another substrate of the active display a common electrode; during the period in which the display electrode transmits a display signal, the driving circuit is configured to perform sequential scanning on a column of electrodes on the active display, and a row of electrodes and a common electrode on the active display cooperate to output corresponding Displaying a signal; there is a frame blanking period between every two display scanning periods, in which the active display does not perform display driving, the column electrode scanning stops, and the display driving circuit applies to all The column electrodes each output a non-selection signal, the row electrode, the common electrode maintains an original output state or a predetermined output signal, and some or all of the active devices on the active display are in an off state; wherein, the active During the period in which the electrode of the display transmits the touch signal, the applied touch signal has a transient potential difference between the electrodes 098142156. Form No. A0101 Page 50 / Total 77 Page 0993125345-0 201120844 'Make the initiative The active device on the display remains off, excluding the touch signal for display ring. The touch display capable of eliminating the touch influence display according to the first aspect of the patent application, wherein the active device in the upper portion of the active display is in an off state means that the active display is directly connected to a display unit The active device connected is kept in an off state. Ο 5 The touch display device capable of eliminating the touch-sensitive display according to the first aspect of the patent application, wherein excluding the influence of the touch signal on the display is connecting the column electrode group of the active device array and the row The transient potential difference of the touch signal applied to each electrode line of the electrode group causes all or part of the active device on the display to remain off. According to the fifth aspect of the patent application, the touch display of the touch-sensitive display is excluded, wherein the influence of the touch signal on the display is excluded, and the column electrode group or the row of electricity connected to the active device array is connected. The transient potential difference of the touch signal applied to the partial electrode line in the & group and the common electrode is such that the active body connected to the partial electrode line is in an off state. The touch-sensitive display capable of eliminating the touch-sensitive display according to the first aspect of the patent application, wherein the active device array on the substrate of the active display is a thin film field effect transistor array, and the column electrode lines are respectively Connecting a gate and a source of the thin film field effect transistor, or respectively connecting a gate and a drain of the thin film field effect transistor, and connecting the column electrode group and the row electrode group of the thin field effect transistor array Transient potential differences of the touch signals applied to the respective electrode lines maintain all or part of the thin film field effect transistors on the active display in an off state. 098142156 The touch display capable of eliminating the touch influence display according to the first aspect of the patent application, wherein the active device array on the display substrate is a film form number A0101 page 51 / page 77 0993125345-0 6 . 201120844 Field effect transistor array 5, the column electrode lines are respectively connected to the gate and source of the thin film field effect transistor, or respectively connected to the gate and the drain of the thin film field effect transistor, in the column electrode line or the The transient potential difference of the touch signal applied to the electrode line connecting the gate of the thin film field effect transistor and the common electrode in the row electrode line keeps all or part of the active device on the display in an off state. 7. The touch display capable of eliminating the touch-sensitive display according to the first or sixth aspect of the patent application, wherein the relationship between the touch signals between the electrodes applying the touch signal is maintained. The average value of the potential difference between the electrodes does not change, so that the display effect does not change appreciably. The touch display capable of eliminating the touch-sensitive display according to the first aspect of the patent application, wherein the touch signal is between the different electrode groups during a period in which the active display electrode transmits the touch signal The potential difference has a period of time that remains fixed. The touch display capable of eliminating the touch-sensitive display according to the first aspect of the patent application, wherein the touch signal is between different electrode groups during each period of the active display electrode transmitting the touch signal The touch display can be excluded from the touch-sensitive display, wherein the touch signal is applied to the column electrode, the row electrode group or the common electrode, as described in claim 1 of the patent application. It is an alternating signal, or a mixed signal of alternating signal and direct current signal. 11. The touch display capable of eliminating the touch influence display according to claim 10, wherein the waveform of the alternating signal component in the touch signal is a square wave, a sine wave, a triangle wave, a sawtooth wave, and the like. One kind. 12. Touch 098142156 which can eliminate the touch influence display as described in the scope of patent application No. 10 Form No. A0101 Page 52 / Total 77 Page 0993125345-0 201120844 Display, wherein the frequency of the AC signal component in the touch signal It is above 10kHz or 10kHz. 13. The touch display capable of eliminating a touch influence display according to the first aspect of the patent application, wherein the active display is a thin film field effect transistor liquid crystal display or other active liquid crystal display, an active organic light emitting diode One of a display, an active carbon nanotube display. ❹ 0993125345-0 098142156 Form No. A0101 Page 53 of 77