TW201120845A - 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 liquid crystal 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. At least one substrate of the active liquid crystal display is provided with an active device array and a row and column electrode set connected with the active device array. Another substrate of the display is provided with a common electrode. After finishing a normal display period, a liquid crystal pre-driving signal is applied on some or all of row and column electrode lines and the common electrode of the display. The liquid crystal pre-driving signal enables the potential difference to be not less than a saturation driving voltage of the liquid crystal between the row and column electrode line applied with the liquid crystal pre-driving signal and the common electrode, and enables the liquid crystal molecule between the row and column electrode line applied with the liquid crystal pre-driving signal and the common electrode to be in a certain arrange state, and enables to remove the impact on the touch-control signal detection due to the change of the display content.

Description

201120845 π, the description of the goods: [Technical field of the invention] [0001] The present invention relates to a miscellaneous screen and a flat display (four), in particular, - display two [0002] [Prior Art] Touch screen development has been widely used for personal Computers, smart phones, public information, smart home appliances, health control and many other areas of the touch field's main areas are electric touch screens, photoelectric touch screens, ultrasonic touch screens, plane capacitors In recent years, the projected capacitive touch screen has developed rapidly. However, at present, these touch screens have their own technical deficiencies, which has led to the adoption of some of them. However, it is difficult to apply them in ordinary displays. ’ ’’, [0003] 1 _ The display and touch screen are for twin products. In the prior art, the display and touch screens are usually independently performed by the display and the touch screen. At present, the discrete flat panel display with touch function is composed of a display device, a display driver, a touch screen, a touch signal device, a backlight, and the like, and the touch screen has a different sense-measurement principle. J! Parallel, capacitive, electromagnetic, ultrasonic and photoelectric, etc., displays passive liquid crystal display (TN/STN-LCD), active liquid crystal display (TFT_LCD), organic light emitting diode display (〇LED, AM - OLED), plasma display (PDP), carbon nanotube display, electronic paper (e_paper), and the like. A flat panel display with a touch screen overlays the split touch screen with the display layer. The position of the touch point is detected by the touch screen, and the cursor on the display is followed by the touch point. The cascading of the touch screen and the display makes the touch-type flat panel display thicker and heavier and the cost increases; at the touch 098142369 Form No. 1010101 Page 3/77 Page 0993125395-0 201120845 Touch screen sensing when the control screen is placed in front of the display The reflection generated by the 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] Find a solution to solve the above-mentioned structural complexity problem, improve the reliability of the flat panel display with touch function, improve the display effect, compress the thickness, reduce the cost, and realize the touch function of the flat panel display in a simple manner. ^. [0005] The application number is CN20061 00948141, the name is "touch type flat panel display" and the application number is CN20061 0 1065583, the name is "flat-screen display with touch function" Chinese invention patent specification, respectively revealing a touch detection The connection between the circuit and the display electrode, through the analog switch or the loading circuit, the display electrode or the transmission display driving signal, or the transmission and sensing of the touch signal, the display driving and the touch detection time division multiplexing (TDM) or both The display electrodes are shared, and the display electrodes are used for both display driving and touch detection, thereby 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. 098142369 Form No. A0101 Page 4 / Total 77 Page 0993125395-0 201120845 -= This type of touch panel display disclosed in the national patent uses two sets of intersecting electrodes on the display as touch sensing electrodes to connect the touch excitation Source, touch source. The polar line applies an AC or DC touch excitation signal. When the finger of the person=other touch object# is near or makes an electrode line, the touch circuit passes and measures the size of the touch signal change of each electrode line, thereby finding the position of the finger or other touch object on the display. . This is a kind of __ touch two-in-one-style detection technology ‘has significant cost of money, and it has a broad development prospect. The present invention is a modification of the method for eliminating the change of the display content to the touch signal detection. ::,,, t - Vl ^, [Summary], 'y'; ςΛ _9] The purpose of the invention is to provide a touch display that can eliminate the display affecting touches. The problem of the impact of stupid signal detection. [0010] The present invention provides a touch display capable of eliminating display effects, including an active liquid crystal display, a display boat circuit, a touch circuit, and a display electrode for both display driving and touch detection. 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; and the display/touch signal strobe output circuit enables the display electrode Or communicating with the display driving circuit to transmit the display driving signal, or communicating with the touch detecting circuit to transmit the touch signal 'display driving and touch detecting time-division multiplexed display electrodes; the display/touch signal is implanted into the circuit to simultaneously display the electrodes Transmission display drive signal and touch signal, display drive and touch detection simultaneously display 098142369 Form No. A0101 Page 5 / Total T7 page 0993125395-0 201120845 Electrode; Active device on at least one substrate of active LCD The array and the column electrode group and the row electrode group connecting the active device array are on another substrate of the display Having a common electrode; after the end of the normal display period, a liquid crystal pre-drive signal is applied to some or all of the row and column electrode lines of the display and the common electrode, and the size of the liquid crystal pre-drive signal is such that the row and column electrode lines to which the liquid crystal pre-drive signal is applied are opposite to the common electrode The potential difference between the electrodes is not less than the saturation driving voltage of the liquid crystal, so that the liquid crystal molecules between the row electrode line and the common electrode to which the liquid crystal pre-driving signal is applied are in a certain arrangement state, thereby eliminating the influence of the display content change on the touch signal detection. . [0011] Further, in a preferred embodiment of the present invention, wherein the liquid crystal pre-drive signals applied on part or all of the row and column electrode lines and the common electrode are applied to different row and column electrode lines at the same time or at different times. During the period in which the liquid crystal pre-drive signal is applied to the row and column electrode lines, there is also a time at which the liquid crystal pre-drive signal is applied to the common electrode. [0012] wherein, the liquid crystal pre-drive signal applied on part or all of the row and column electrode lines of the display and the common electrode is applied after applying a liquid crystal pre-drive signal to part or all of the row and column electrode lines and the common electrode of the display. The row and electrode lines of the liquid crystal pre-drive signal apply a touch signal, and detect a change of the touch signal on the electrode line. [0013] wherein the liquid crystal pre-drive signal applied on part or all of the row and column electrode lines and the common electrode of the display is performed by applying a touch signal to the row and column electrode lines or after applying a touch signal to the row and column electrode lines. Applying liquid crystal 098142369 to part or all of the row and column electrode lines of the display. Form No. A0101 Page 6 of 77 0993125395-0 201120845 Pre-drive signal; after applying the liquid crystal pre-drive signal, it detects the application of the liquid crystal pre-drive signal. The change of the touch signal on the electrode line is 0 [0014] wherein the active device array on the display is a thin film field effect transistor (TFT) array, and the row and electrode lines are respectively connected to the gate and source of the thin film field effect transistor, or respectively Connecting the thin film field effect transistor gate and the immersion, the row electrode line connecting the source or the drain of the thin film field effect transistor has a period of simultaneously applying the liquid crystal pre-drive signal 〇 [0015] wherein some or all of the rows and columns of the display are Applying a liquid crystal pre-drive signal to the line and the common electrode, which is all or part of the row and column electrodes on the display Xi carrier locked state active period at the device connected to the significant pixel f.心一::V 夕 , [ooie] where the liquid crystal pre-drive signal is applied on the display during the on-state period of the active device connected to the pixel. [0017] wherein the liquid crystal pre-drive signal and the touch signal are simultaneously applied during the on-state period of the active device connected to the display pixel on the display. ;:t - 1 ^v A , \ - [〇〇18] where the active device on the display, the 'Array 芩 thin film field effect transistor array, in the thin film field effect transistor connected to the display pixel During the on-state period, a liquid crystal pre-drive signal is applied to the row and common electrodes of the source or drain of the thin film field effect transistor. [_]The liquid crystal pre-drive signal applied to the common electrode on the row electrode group, one of the alternating current signal, the direct current signal, the alternating current and the direct current mixed signal. [0_纟中] Liquid crystal pre-drive signal and touch applied to the same electrode of the display 098142369 Form No. A0101 Page 7 of 77 0993125395-0 201120845 The control signal is an AC signal with the same frequency or waveform. [0025] [0024] wherein the frequency of the liquid crystal pre-drive signal is 10 kHz or more. As described above, the touch display capable of eliminating the touch-sensitive display of the present invention may have one or more of the following advantages: (1) The method disclosed in the present invention allows the wave crystal display to be placed by setting a saturation pre-drive process. The arrangement of liquid crystal molecules between the column electrode and the common (COM) electrode and between the row electrode and the common electrode tends to be uniform, which provides a consistent measurement environment for touch detection, and avoids the influence of touch detection on the display content. . [Embodiment], gas ~_s 1 : The present invention is applicable to a liquid crystal display (LCD) including an array (R0W) electrode and a cblumn electrode, an organic light emitting diode display (〇LED, Ag OLED) , plasma display (pdp), carbon nanotubes, e-paper (e-paper) and other flat panel displays.

The content of this specification is described by a typical representative thin film field effect transistor liquid crystal display (Thin Fil-m Transist Qr_LCP, TFT-LCD) of an active liquid crystal display. The thin film field effect transistor liquid crystal (IV) is a typical representative of an active moment crystal display (AM LCD). It uses a thin film field effect transistor (TFT) on a substrate as a switching device. A typical structure of the TFT_LCD display 1 is as shown in Fig. 1: 11〇 is a TFT liquid crystal screen; 12〇 is a liquid crystal screen horizontal scanning column electrode, 121, 122.....12m-1, 12m is a scanning electrode Line (column electrode line); 13〇 is the liquid crystal screen vertical direction data row electrode, 131, ..., Un is the data electrode line (row electrode line); 140 is common 098142369 Form No. A0101 Page 8 / Total 77 Page 0993125395-0 201120845 Electrode ((10) electrode), the potential of the common electrode connection is used as the reference potential of the liquid crystal display pixel, 150 is the thin film transistor m on the liquid crystal screen, and the gate is connected to the horizontal scanning line, the source ( a) connected to the vertical direction of the data line 1 (Drain) is connected to the display pixel electrode; 16G is the liquid crystal molecule box corresponding to the display of the transilin, the equivalent of a capacitor on the money - this capacitance is generally defined as Clc; 17〇 is the storage capacitor (Csaccitance Storage, Cs), which is used to store the information of the display pixels; 18G is the common electrode voltage source, which is responsible for generating the common electrode reference voltage (Vcom Reference); 181 is the gate electrode of the TFT_LCD (column electrode) ) Driver (Gate Drivei〇, used; 182 is the source of the TFT-LCD 'electrode' electrode) s〇urce Dr i ver, used to drive the vertical direction:, credit line:; 4 The 83^ Timing Controller is responsible for receiving and receiving the RGB data from the volume signal processing chip, the clock signal Clock, the horizontal sync Hsync* vertical sync signal Vsync, and converting these signals for controlling the source ( The row electrode driver (Source DriverX and the gate electrode driver (Gate Driver) work together. [0026] A pixel is generally composed of two sub-pixels that display three primary colors of red, green, and blue. The structure of the sub-pixel is shown in Figure 2:

Gi represents the horizontal direction column scan electrode line 'also referred to as column drive electrode line or gate drive electrode line'. The potential on Gi is Vg; Sj represents the vertical direction line data electrode line 'also referred to as row drive electrode line or source drive electrode line The potential on Sj• is Vs; Dij represents the terminal of the TFT connected display pixel, called the drain, the potential on Dij is Vd, also called the pixel potential; each display pixel is equipped with a semiconductor switching device-film substrate Effect Transistor 098142369 Form Number A0101 0993125395-0 201120845 (TFT) 'The scan can be directly controlled by the pulse to gate the display, so each pixel is relatively independent. The electric grind between the gate and the source of the TFT is Vgs, and the voltage between the gate and the drain of the TFT is Vgd. Thin film field effect transistors (TFTs) are available in both NM0S and PM〇S types. At present, most of the film-effects of the TFT-LCD are made of amorphous silicon (a-Si) process, whose gate insulating layer is tantalum nitride (SiNx), which is easy to be used. Taking a positive charge 'to form a channel in the amorphous germanium semiconductor layer, just using the positive charge in the nitrite to help attract electrons to form a channel, so the TFT using the amorphous process is mostly of the NM0S type. The content of this manual is mainly based on the 00S type thin film field effect transistor as the 戥 进行 乂 乂 乂 乂 乂 乂 乂 乂 乂 乂 乂 乂 乂 场 场 场 场 场 场 场 场 场 场 场 场 场 场 场 场 场 场 场 场 场[0027] The timing of the conventional display driving of the TFT-LCD liquid crystal display is as shown in FIG. 3: In the display scanning time period, the display driving circuit performs sequential scanning display on the column electrodes, and the row electrode and the c〇M electrode cooperate. Output the corresponding display signal 'Let the display be in the display state; there will be a 帻, blank blanking period (Vertical Blanking Time) between each two display scanning time periods, in which the display does not perform display driving, the display drive circuit pairs The column electrode scanning stops, and the non-selection signal of the TFT is outputted to all the column electrodes, and the row electrode and the COM electrode maintain the original output state or a certain preset output signal, and the TFT is in an off state. The technical solution of the multiplexed display electrode in the present invention is to use the blanking time period of the building as the time period of the multiplexed display electrode as the detecting electrode. A touch circuit works by controlling a display driving circuit and a touch circuit to 'connect a display electrode or a display driving circuit to transmit a display driver 098142369 Form No. 1010101 Page 10/77 pages 0993125395-0 [0028] 201120845 [0029] [ 0030] [0031] 098142369 0993125395-0 Signal, or connected to the touch circuit with the transmission touch signal, display drive and touch detection time-division multiplex display electrode. During the display period, the display electrode communicates with the display driving circuit to transmit the display driving signal, and the display is in the display state. During the touch detection period, the display electrode is connected to the touch circuit driving touch signal, and respectively detects the change of the touch signal flowing through each column electrode line and each row electrode line, and the touch signal changes to reach a certain setting 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. In addition, the method of the present invention is based on the selection of a reasonable touch. The excitation signal: square, :, is intended to avoid the effect of the touch excitation signal affecting the display effect, the specific implementation method is seven Fang ^ ten proposed to avoid the impact of the impact of the touch (four) _ solution, the specific implementation of the ten - to the way thirteen reveals the selection requirements of the touch-transfer clearing rate 'specific implementation fourteen and ten: five materials & control During the detection, the synchronization of the touch signal is detected and the synchronization of the touch signal of the government machine. The specific implementation method 20 to 23 reveals various single-channel and multi-channel reduction methods and sequences. These embodiments are improvements to the rest of the touch circuit. The use thereof does not affect the implementation of the technical solution of the present invention, and does not affect the scope of protection of the present invention. The electrical connection relationship of the touch display with TFT-LCD as the display is as shown in Fig. 4. The TFT-LCD display 41Q is included; the scanning column electrode 420' of the horizontal direction of the Tn_L speaker has column electrode lines 421, ..., 42m; m_IXD (four) 14 square (four) data row electrode paste, having the form number A0101 first; [Page/total 77 pages 201120845 row electrode lines 431, ..., 43n, common electrode layer (COM electrode) 440 of TFT-LCD display; thin film field effect transistor TFT 450 on TFT-LCD display, gate connected to horizontal scanning column The electrode line 'source' is connected to the vertical data line electrode line, and the drain (Drain) is connected to the pixel electrode; the liquid crystal cell 4 corresponding to the display pixel is electrically equivalent to a capacitor, and the capacitance is generally defined. For C;

The LC storage capacitor (Capacitance Storage, Cs) 470 is used to store the display information of the pixel, the display driving circuit 48 of the COM electrode, the touch excitation source 481 for the COM electrode in the touch detection state, and the COM signal selection of the COM electrode. Through-output circuit 482; display scan drive circuit 483 of column electrode, touch circuit of column electrode (with touch excitation source and touch signal detection circuit) 484 'column of column electrode reaches ^ circuit 485 Ί. row electrode Display data drive circuit 486 'line electrode ^ touch electric sore: (纟 true touch excitation source and touch signal detection circuit) 487, row electrode line signal strobe circuit 488; timing controller (Timing Contr .oller) 489 and so on. The display scan driving circuit 483 and the touch control circuit 484 are connected to the column electrode 420. The display data driving circuit 486 and the touch circuit 487 are connected to the row electrode 430 through the line signal output circuit 488; The COM display driving circuit 480 and the touch excitation source 481 are connected to the COM electrode 440 through the COM signal strobe output circuit 482. [0032] The timing controller 489 receives the RGB data from the image signal processing chip, the clock signal Clock, the horizontal synchronization Hsync, and the vertical synchronization signal VSync, and controls the column display driving circuit 483 connecting the gates and the row display driving circuit connected to the source. 486 and COM display driving circuit 480 connected to the common electrode work together; also control column touch circuit 484 connecting the source, connection 098142369 Form No. A0101 Page 12 / 77 pages 0993125395-0 201120845 [0033] [0034] [0036] The gate touch circuit 487 of the gate and the c〇M touch excitation source 481 connected to the common electrode cooperate; and the column gate circuit 485, the row gate circuit 48 8 and the COM in the touch display The signal strobe output circuit 482 enables the display electrode to communicate with the display drive circuit to transmit a display drive signal, or to communicate with the touch circuit to transmit a touch signal, display drive and touch detection time-division multiplex display electrodes. During the display period, the column strobe circuit 485, the row strobe path 488, and the COM signal strobe output circuit 482 in the touch display 4A respectively connect the display column electrode 420, the row electrode 430, and the COM electrode 440 to the column display. The drive circuit 483, the line display drive circuit 486, and the COM display drive circuit 480 transmit display drive signals, and the display 41 is deducted. ',, during the touch detection period, the touch display & 4〇0 within the first sound pass circuit 485, the row gate circuit 488 and the COM signal gate output circuit 482 enable the display column electrode 420, the row electrode 43 and the (10) electrode 44〇, respectively, the connected column touch circuit 484, the line touch circuit and (3) the control excitation source 481 transmits the touch signal, and respectively detects the change of the touch signal flowing through each of the opposite line and each line electrode line. The row and column: Wei minus is used as the occupational sensing electrode; the column touch circuit 484 and the line touch circuit 487 detect that the column electrode line and the row electrode line of the limb condition of the change of the touch signal flowing through are the touched electrode line. The position of the touch point on the display 41q is determined by the intersection of the (four) electrode line and the touched electrode line. Fig. 4 is a view showing the structure of a typical touch display, and the following description of the specific embodiments is based on this structure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A 098142369 Form No. A0101 Page 13 of 77 0993125395-0 201120845 The touch display shown in Fig. 4 shows the timing of the display electrodes being time-divided as shown in Fig. 5. The frame blanking time slave between each frame of _ _ ^ ^ mother and child is used as the touch detection period, this time, the morning face is not the electrode switch ^ control induction coffee on the wire touch incentive message, and The change of the touch signal on the sensor electrode is detected. [0037] The touch excitation source is a square wave signal source having a DC bottom value or no DC bottom value. In the touch detection, 'for the TFT shown in FIG. 2 The three electrodes of Gl, Sj, and c〇M respectively apply the touch excitation signals as shown in FIG. 6, and the three touch excitations applied are “the same as the DC or the bottom of the money, and the frequency is the same. Phase H: When the display electrode is switched from the display state to the touch detection state, the transient potential of the touch excitation signal applied to the electrode _ electrode Sj is: the Vgs alarm Js is lower than the voltage at which the TFT is in the off state; It is necessary to apply a suitable touch excitation signal to the (10) electrode and the electrode Gi. The average value of the pixel electrode potential VCOM electrode potential vcom is not maintained, and the pixel potential yd is in accordance with Vgd Vg Vd. Tft at the cutoff voltage of the off state - this requires 'vehicle Vgs#, both lower than let m In the cut-off state, the cut-off is free to ensure that the Tft can effectively capture the jh in the touch detection state, maintaining the voltage of the display pixel, so that the display effect is not affected by the touch detection. [0038] The excitation choice is the square wave signal source with or without the DC bottom value. The frequency and phase of the two-way signal source are the same, so the amplitude of the jump is the same, so that the Gi, Sj of the TFT The excitation signal (4) applied by the three electrodes of COM is a constant DC potential 〇evei). In fact, the touch detection can be obtained by using a simple detection circuit to obtain good 098142369 Form No. A0101 Page 14/77 Page 0993125395-0 201120845 Good detection effect, and the generation of the signal source is very convenient and has high practical value. [0039] The second embodiment differs from the first embodiment in that the three touch excitation signals are applied ( The frequency of the present invention is different from that of the first embodiment and the second embodiment in that the three touch excitation signals are all provided with a DC bottom. Value or A square wave having a DC bottom value is the same in frequency but not in phase, as shown in Fig. 8. [0041] The fourth embodiment is different from the first embodiment to the third embodiment. In the touch detection, as shown in Fig. 2, the three electrodes of Gi, Sj, and COM of the TFT are respectively applied with the touch excitation signals as shown in Fig. 9, and the three touch excitation signals applied are DC bottom. A value or a sine wave without a DC bottom value (note that Embodiments 1 to 3 are square waves instead of sine waves) have the same frequency and phase. [0042] Embodiment 5 This embodiment is different from Embodiment 1 to Embodiment 4. In the touch detection, as shown in FIG. 2, the three electrodes of Gi, Sj, and COM of the TFT are respectively applied with the touch excitation signals as shown in FIG. 10, and the three touch excitation signals applied are The dc value or the sine wave without the DC bottom value is the same in frequency and phase, but the amplitude of the AC part of the waveform is different. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Sixth embodiment differs from the first embodiment to the fifth embodiment in that the touch test 098142369 form number A0101 page 15 / page 77 0993125395-0 201120845 is measured as shown in FIG. 2 The three electrodes of the Gi, Sj, and c〇M of the TFT are respectively applied with the touch excitation signals as shown in FIG. 11, and the combination of the excitation signals does not cause the pixel electrode potential V (the mc〇M electrode potential to be 〇1]1 average. The values remain unchanged, but the potential difference Vd_VeQ_ of the two can be kept constant, and the display effect can be prevented from being affected by the touch detection. [0044] The touch display shown in FIG. 4〇〇, the display uses tft-lcd, tft-lcd uses a positive liquid crystal material. The characteristic of the dielectric property anisotropy of the liquid crystal material changes the distribution of the electric crystals in the liquid crystal cell. The arrangement of liquid crystal molecules in the LCD depends on the cumulative effect value of the driving electromigration at that place, and the difference between the different positions of the driving and the accumulating driving «the effective value is different, the liquid crystal molecules are aged and the capacitance is different, and the touch is made. The measurement environment for controlled detection is different. When the driving voltage is applied to the TFT_LCD, the alignment state of the liquid crystal molecules tends to be parallel to the direction of the electric field due to the action of the driving electric field. [0045] Another time for displaying the electrode time-division multi-paint: The sequence is as shown in Fig. 12. The blanking time period between the display blocks is used as the touch detection period. In the time period, a saturated preset drive is applied to all the column electrode lines Gi and the row electrode lines Sj of the display (pre-drive, pre one)抒iving), the signal waveform on the three electrodes of Gi, Sj*c〇M is as shown in Fig. 13, and the touch excitation signal is a sine wave with a DC bottom value or no DC bottom value. [0046]

The potential difference Vgs between Gi~sj is lower than _10.5uM?v below the cut-off voltage that makes tft in the off state, avoiding the influence display; the 098142369 potential difference Vgc between Gi_c〇M is between _1〇5H, _12V form number A0101 Page 16 of 77 The potential difference between sj-COM is 0993125395-0. 201120845 /SC is 5V, both exceeding the saturation drive voltage of liquid crystal molecules. Under the action of the applied saturation driving voltage, the liquid crystal molecules between the liquid crystal molecules, the row electrodes and the COM electrodes between the column electrodes and the c〇M electrodes in the liquid crystal display are aligned in a direction to rapidly turn toward the electric field. direction. As shown in Fig. 14, when an electric field is applied to the molecules of the positive liquid crystal material, the arrangement 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 respectively; the previous saturated pre-drive voltage makes the liquid crystal The molecular arrangement is consistent, and the variation of the distribution capacitance caused by the anisotropy of the dielectric constant of the liquid crystal material is excluded. When the row electrode control lines of each row electrode line are detected, the measurement loops at different positions at different times are involved. Therefore, 'is conducive to the stability and consistency of the touch detection results. [0047] When the liquid crystal is applied with an electric field, since the liquid crystal molecules are non-selective molecules, the arrangement of the liquid crystal molecules in Fig. 14 does not cause the field to be positive or negative. Influence, so the cancer on the electrode of the pre-driver: the state is positive and negative, as long as the fly coffee w - 1 r %; }, the saturation drive of the liquid crystal can be. The waveform or frequency and amplitude of the pre-drive signal and the touch excitation signal k applied to the same electrode of the display can be the same, and even the pre-drive signal and the touch excitation signal can be the same signal. [0048] Embodiment 8 differs from Embodiment 7 in that the TFT-LCD in this example uses a negative liquid crystal material, as shown in FIG. 15 , and the touch display 400 shown in FIG. 4 is The display adopts TFT-LCD, and the form is edited by A0101. Page 17/77 pages 0993125395-0 [0049] 201120845 The response speed of the liquid crystal display is relatively low. When displaying the high-speed surface, it is easy to have residual image and tailing phenomenon. In order to solve this problem, a current solution is to increase the frame rate of the display, insert a "black frame" after each display frame, and let the "black frame" block the residual shirt of the previously displayed content. The so-called black frame is in this frame, in the state where the TFT is on, a saturation driving voltage is applied to the display pixel electrode through the row electrode Sj, so that the alignment of the liquid crystal molecules in the pixel is consistent or perpendicular to the applied electric field. The direction. In the case where the arrangement of the liquid crystal molecules in the display pixel is in the same state, the arrangement of the liquid crystal molecules between the row electrode and the c〇M electrode in the liquid crystal display will also be uniform. Since the column electrode is the scan electrode, the effective value of the voltage on each column electrode is the same _, and in the case where the alignment of the liquid crystal molecules between the electrodes of the line is known, the distribution capacitance on the Γ electrode is basically The timing of the electrode display time division multiplexing scheme is shown in Fig. 16. After the black building, the touch excitation signal is applied to the display column electrode line Gi and the row electrode line Sj, respectively. The change of the touch signal of each riding electrode line. The black matrix is used to make the liquid crystal molecules are aligned. The change of the distributed capacitance caused by the anisotropy of the dielectric constant of the liquid crystal material is detected to detect the line on each column electrode line and each row electrode line. When the control signal changes, the measurement environment at different positions tends to be consistent at different times, which is beneficial to the stability and consistency of the touch _ result. [0051] The fourth embodiment of the touch display 4QG The display uses a claw-LCD, which is the same as in the ninth embodiment, and also inserts a ... building black duck behind each patch to block the residual image of the displayed content. 098142369 Form No. A0101 Page 18 / Total Page 0993125395-0 201120845 Different from the ninth embodiment, the display electrode time division multi-engineering scheme is repeated.

The electrode is used; the black crystal molecules are arranged to eliminate the change of the distributed capacitance caused by the dielectric constant of the liquid crystal material; and the comprehensive judgment is made to eliminate the influence of the inconsistent alignment of the liquid crystal molecules on the detection environment. The thickness of the glass substrate is 0. 3mm. The thickness of the glass substrate is 0. 3mm. When a person squats: the finger 峩 峩 'shows the 蜀 surface, the finger forms a reciprocal capacitance between the substrate glass piece and the display electrode, and the equivalent circuit is as shown in Fig. 18: No. The 1810 is a touch excitation source for providing a touch excitation signal to the display electrode, and the 1-20 is the equivalent of the display electrode used for the touch sensing electrode by the sampling resistor of the touch-in-channel touch signal detecting circuit. The resistance 1 ^3 〇 is a set of capacitances as the touch sensing electric δ λ 3 « ·; £ ·-> - ' -*·;- ^ The display electrode of the pole is used with respect to the other electrodes in the display, and the 1831 is the finger and A set of coupling capacitors between display electrodes used as touch sensing electrodes, 1832 is a set of capacitance between the display electrodes and the COM electrodes used as touch sensing electrodes. [0053] Generally, the overlap width between the finger and a set of display electrodes used as the touch sensing electrodes is 5 mm or less, the substrate glass thickness is 〇3 mm, and the coupling capacitor 1831 is approximately 10 pF; for the usual sample resistor 1820 and the like The sum of the effective resistors 1821 is about 30 ΚΩ, as the touch sensing electric 098142369 Form No. 1010101 Page 19 / Total 77 Page 0993125395-0 201120845 The touch signal on the display electrode of the pole is partially leaked from the coupling capacitor 1831 to the finger When the touch excitation source outputs a sine wave with Vrms = 5V, the relationship between the leakage current Δ i caused by the coupling capacitor 1 831 and the frequency of the touch excitation source is as shown in FIG. The frequency of the touch excitation signal has a major influence on the capacitive reactance of the coupling capacitor 1831, and the capacitive reactance is different, and the magnitude of the touch signal that the 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 great influence on the reliability of the touch detection, especially when the protective cover is added in front of the display. [0054] As can be seen from FIG. 19, in actual experimental results, when the frequency of the touch excitation source is lower than ΙΟΚΗζ, the leakage current Δί is small, and it is not sufficiently distinguishable from the environmental noise, and the touch excitation is When the source frequency is set to ΙΟΚΗζ or above, it is a reasonable circuit parameter that uses the display electrode as the touch sensing electrode. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 12 The touch display 400 shown in Fig. 4 is a TFT-LCD 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 COM electrode of the display, and a coupling capacitor exists 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 display electrodes used as a touch sensing electrode 098142369 Form No. A0101 No. 20 Page / Total 77 pages 0993125395-0 201120845^ The special effect resistor '2G3G is the distribution capacitance of the display electrode used as the sensor electrode relative to the other electrodes in the display, (9) "Yes (3) the electrode and a group as the touch sensing electrode The coupling capacitance between the display electrodes used, 2032 is the light-combining capacitance between the finger and the COM electrode of the display, and 2〇40 is the equivalent resistance between the excitation source and the COM electrode. [_] Usually 'finger and one group as touch The overlap width between the display electrodes used for the sensing electrodes is 5 mm or less, the thickness of the substrate glass is 〇·3πιπ], and the coupling capacitance 2032 is approximately 10 pF. For the usual TFT_LCD sampling resistors (the sum of the 2 〇 20 and the equivalent resistance 2021 is approximately 3〇ΚΩ ^ When a human finger touches the surface of the touch display, the display is used as a touch sensing power due to the presence of the coupling capacitors 2031 and 2〇32. Part of the control signal - _ capacitor 2031 flows to (10) electroacoustic, young 〇 ^ electrode and finger face • Capacitor 2032 part, turn out to the finger. When using high frequency touch excitation signal, from the coupling capacitor 2031 and 2032 leakage current Δί is larger, the touch signal penetrates the COM electrode mask is more powerful, and can obtain better touch detection capability, .... -.. - ; ' :3⁄4 :.i ^ is ) / -- .: ;.;':;;;;::!, :· ·'· ^ ;j I \-f I [QQ57] Detailed implementation thirteen '^!·^ ί I il Figure 4 The touch display 400 is not used, and the display adopts TFT_LCD. The dielectric material anisotropy of the liquid crystal material changes the distributed capacitance of the liquid crystal cell with the arrangement of liquid crystal molecules everywhere. The arrangement of liquid crystal molecules in the TFT_LCD depends on At this point, the effective value of the electric fine accumulation is driven, and the driving voltages accumulated at different positions at different times have different values, and the liquid crystal molecules are arranged differently, and the measurement environment of the touch detection is different. However, the liquid crystal material is dielectric. The recorded anisotropy has a dispersion effect with frequency. Often under the action of 5G0KHZ or above, 098142369 Form No. A0101 Page 21 / Total 77 Page 0993125395-0 201120845 The anisotropy of the dielectric coefficient is basically not reflected. [0059] Gi and the row electrode line Sj apply touch excitation signals having a frequency of 1 MHz or more, and detect changes in touch signals flowing through the respective column electrode lines and the respective row electrode lines, respectively. Although the arrangement of liquid crystal molecules 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 dielectric constant of the liquid crystal material is excluded for the touch excitation signal of 1 MHz or more. When the change of the distributed capacitance caused by the opposite sex is detected, 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 be consistent, which is favorable for the stability of the touch detection result. consistency. DETAILED DESCRIPTION OF THE INVENTION Fourteenth ~ ^ / & - The touch display 4 〇〇 3 shown in Figure 4, the display type per TFT_LCD. In actual touch detection, the voltage signal is usually used as the detection object for measurement. The equivalent circuit of the measurement is shown in Fig. 18. 1 1810 is a touch-off excitation source for providing a touch excitation signal to the display electrode, and 182 is a sampling of the touch signal detection circuit in the touch circuit. As the touch sensing electrode, the equivalent resistance of the 甩_programmer electrode is 183〇 is the distributed capacitance of the display electrode used as the touch sensing electrode with respect to other electrodes in the display, and the 1831 is a finger and a group as the touch sensing. The coupling capacitance between the display electrodes used by the electrodes, 1832 is a set of capacitance between the display electrode and the COM electrode used as the touch sensing electrode, and 1841 is a touch signal sampling point for measuring the change of the touch signal voltage, and 1840 is a subtraction. The detection reference point of the touch signal voltage change, here is to select the output end of the touch excitation source 1810 as a reference point, in fact, other potential points can be selected as a reference point, such as the ground end of the touch circuit, or touch 098142369 of the circuit Form No. A0101 Page 22 of 77 0993125395-0 201120845 Positive power supply, or the negative power supply of the touch circuit, or a point in the comparison circuit, or touch Another set of electrode lines on the control screen can have good detection results. The touch excitation source 1810 is a square wave signal. Since the 1 830 and the 1831 are capacitive loads, the touch-activated square wave signal has 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. [0060] In the present embodiment, the method for detecting a touch signal uses an instantaneous value measurement method to measure the potential of the touch signal sampling point 18 41 at a specific phase point, and compares the detected time between different frame blanking periods. The change in potential of the particular phase point is used to obtain touch information; the specific phase point is a specific phase point relative to the waveform of the output of the touch excitation source 1810. The circuit shown in Figure 18 uses the excitation source signal as the circuit source, and the branch where the sampling resistor is located is an RC loop in which 1 830 and 1831 capacitors are connected in parallel and then connected to the 1 820 and 1821 resistors. 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 T1 and T2 segments are phase intervals suitable for sampling. At the touch (the signal sampling point 1841, the loose interval of T1 is the period from when the capacitor starts charging to the completion of charging, and the phase interval of T2 is the discharge of the capacitor to the discharge. The completed time period. [0061] To ensure that each detection of the touch signal is at a specific phase point relative to the waveform of the output of the touch excitation source 1810, a strict series of synchronization relationships needs to be maintained. The relationship 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, the frame is cancelled between the two display frames. A fixed time in the hidden time period 098142369 Form No. A0101 Page 23 / Total 77 Page 0993125395-0 201120845 'Stimulus pulse number synchronization. From the start of applying touch excitation signal to as touch sensing

The number of signal pulses, one...TM path, the time at which the sampling path excitation sampling data is started is on the number of touch excitation signal pulses of the same serial number; the phase excitation waveform phase synchronization: each time private The time of the sample data 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 in the two phase intervals of Τ1*Τ2. A complete synchronization process is shown in Figure 22a, Figure 22b, and Figure 22c. Figure 22a is a timing diagram of the time division multiplexing of the display. The column electrodes, row electrodes and electrodes 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 and the row electrodes in the display are performed. The meal nCQM bungee is multiplexed in the frame blanking time period (Η segment and K segment) in the touch Weng adjustment j, the state, according to the test requirements, Μ " / #1 square wave touch excitation signal and detection; g 22b is an enlarged view of the segment and segment (frame blanking period) in Figure 22a. As shown in Figure 22b, the display electrode begins to apply square wave touch excitation at the same fixed time in the frame blanking period. Signal, to achieve frame synchronization; Figure 22c is an enlarged view of the X segment (loading the excitation signal and the time period) in Figure 22b. After the frame synchronization in the display frame blanking period, the touch excitation signal is applied. At the same time, the number of excitation signal pulses is also calculated. Each sampling detection is controlled by the number of touch excitation signal pulses of the same serial number to realize the synchronization of the number of touch excitation pulses; in this touch excitation signal pulse Each time the sampled data is acquired, it is at a certain phase of the waveform of the touch excitation output to achieve synchronization with the phase of the touch excitation waveform. [0062] The specific embodiment fifteenth is different from the fourteenth embodiment, The touch excitation source 1810 is a sine wave signal 098142369 Form No. A0101 Page 24 / Total 77 Page 0993125395-0 201120845 'Because 1830 and 1831 are capacitive loads, the sine wave touch excitation source is charged with the valley load' in the touch The waveform on the signal sampling point is still a sine wave, but the amplitude and phase change occur, and the output waveform of the touch excitation source 181 和 and the touch waveform of the touch signal sampling point are as shown in FIG. 2 . In the method for detecting a touch signal, the phase shift measurement method is used to compare the phase shift of the touch signal sampling point 丨84丨 at a specific phase point in different frame blanking periods to obtain touch information. A specific phase point refers to a specific phase point of the waveform of the output end of the touch excitation source 1810. In the 18th figure, the touch excitation source signal is used as the circuit source, and the branch circuit where the sampling resistor is located is 1830. Connect two capacitors in parallel with 1831 and then connect the two RCs in series with 1820 and 1821 and return to RC. In the touch detection period, apply the touch excitation signal to the circuit shown in Figure 18, sine & $ over > The loop of the team will have a decrease in amplitude and a delay in phase; when the finger is touched, the turn-on capacitor 1831 causes a change in C in the RC loop. 'Measure the sine wave zero-crossing point at the touch signal sampling point relative to the touch excitation source 181 0 output The change of the time difference of the zero-crossing of the end waveform is used to determine whether the touch is not the same: the touch signal waveform on the touch signal sampling point can also be measured at the peak point of the sine wave .Wmwc or other phase points. [0064] 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 rigorous 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: the touch excitation signal is applied from the beginning to the 098142369 form.煸号A0101 Page 25 of 77 0993125395-0 201120845 As the touch-sensing electrode used on the display electrode, start to calculate the touch excitation 5 tiger pulse number 'mother times to obtain sampling and breeding time are all in the same serial number The number of touch excitation signal pulses; phase synchronization of the excitation waveform: the specific phase point of the touch signal waveform on the touch signal sampling point is measured, and the time phase of the same phase of the waveform of the output end of the touch excitation source is compared; the phase of the sine wave is compared The shift information is all-phase, so it is only necessary to look at the movement of the same specific phase point each time. A complete synchronization process is shown in Figure 24a, Figure 24b, and Figure 24c. Figure 24a is a timing diagram of the time division multiplexing of the display. * The column electrode, the row electrode, and the C 0 Μ electrode are displayed in the display period, and the corresponding display signals are outputted, and the display scan is performed sequentially. The column electrode, the row electrode, and the COM electrode of the display are multiplexed in the touch detection state during the frame blanking period (H segment and K segment) of the display, and the sine wave excitation signal is loaded and detected according to the detection requirement; The figure is an enlarged view of the Η segment and the K segment (the frame blanking period shown) in Figure 24a. As shown in Figure 24b, the display electrode begins to apply a sine wave at the same fixed time in the displayed frame blanking period. Controlling the excitation signal to achieve frame synchronization; Figure 24c is an enlarged schematic view of the X segment (applying the touch excitation signal and detecting the time period) in Figure 24b, after the frame synchronization is performed in the frame blanking period shown The sine wave touch excitation signal, and also begins to calculate the number of touch excitation signal pulses, each sampling detection is controlled on the same number of touch excitation signal pulses to achieve the excitation pulse number synchronization; In the sinusoidal touch excitation signal pulse, each time the sampled data is acquired, it is at the same specific phase point of the waveform of the touch excitation output end, so as to realize the phase synchronization with the touch excitation waveform 098142369 Form No. A0101 26 pages/total 77 pages 0993125395-0 201120845 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Sixteenth and fifteenth embodiments are touch detection of the touch display 400 of FIG. 4 by means of instantaneous value measurement. This instantaneous value measurement method 进行 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, and the data sampling channel has an analog digital conversion circuit; the data processing and the timing control circuit have a cold production: calculating the temporary force and the output of the material. The t-processor of the input interface has a control software and a data processing software. V: [0066] 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, and 2541 is a detecting reference.

... jr I point signal, touch signal sampling point function k number 25^0 and speculative reference point signal 2511 are buffered by buffer 2_&2|^ buffer fe2521 respectively, as the first stage difference The input signal of the amplifier 2522; the output of the first stage differential amplifier 2522 is used as one of the inputs of the second stage differential amplifier 2523, and the 2524 is the regulated voltage output, which serves as a reference potential and is connected to the other input of the second stage differential amplifier 2523. Used to subtract the bottom value of the output signal of the first stage differential amplifier circuit; the second stage differential amplifier 2523 outputs to the Analog-to-Digital Converter 2525, 2525 in the central processor (CPU, MPU) 2526 output Simultaneous sampling under the control of the synchronization control signal 2530, sampling conversion 098142369 Form number A0101 Page 27 / Total 77 page 0993125395-0 201120845 The result is sent to the central processing unit (CPU, MPU) 2526, and then by the central processing unit Data processing and touch judgment. [0067] FIG. 26 is a structural diagram of a touch signal detecting circuit of an instantaneous value measuring method. 2610 is a signal 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 is The signal 2611 of the detection reference point is buffered by the buffer 2620 and the buffer 2621, respectively, as an 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 as f ^ t 1 f , , the reference potential, and the other input connected to the second stage difference, Λ , Λ % - is used to subtract the flat value of the first stage differential amplifier; the second stage differential amplifier 2623 is output to the analog to digital converter 2625, 2625 under the control of the synchronous control signal 2630 output by the central processing unit (CPU, MPU) 2626 Simultaneous sampling is performed, and the sampling conversion result is sent to the central processing unit (CPU, MPU) 2626, and then the data processing and touch determination are performed by the central processing unit. ...: [0068] Figure 27 shows a structure of the touch signal detection circuit of the instantaneous value measurement method, 2710 is the signal of the touch signal sampling point, 2711 is the signal for detecting the reference point, and the signal of the touch signal sampling point The signal 2711 of the 2710 and the detection reference point is buffered by the buffer 2720 and the buffer 2721, respectively, as an input signal of the first stage differential amplifier 2722; the output of the first stage differential amplifier 2722 is again used as one of the second stage differential amplifiers 2723. Input, the central processing unit (CPU, MPU) 2726 sends the adjustment data to the digital-to-analog converter 2724 according to the result of the touch operation, and the output voltage of the 2724 is 098142369. Form number A0101 page 28/total T7 page 0993125395-0 201120845^ ... a quasi-potential connected to the other input of the second stage differential amplifier 2723 for subtracting the bottom value of the output signal of the first stage differential amplifying circuit; the second stage differential amplifier 2723 is output to the analog bit converter 2725, 2725 at the central processor (CPU, MPU) Synchronous sampling is performed under the control of the synchronous control signal 2730 outputted by the 2726, and the converted result of the sampling is sent to the central processing unit (CP). U, MPU) 2726, and then the central processing unit for data processing and touch judgment. [0069] The three kinds of instantaneous value measurement touches shown in FIG. 25, FIG. 26, and FIG. 27 (::: The difference of the signal detection circuit is that the scheme shown in FIG. 25 is a manual method to the second differential circuit. Set ~ reference potential, have basic adjustment ability for the secondary differential circuit; the first A® · go to the case ^ soil differential circuit 5 ' ? ξι , - the wheel-out signal 铨 analog circuit again, back # give ϋ difference, sub-station as the base, ν - 1 ^ - quasi-potential 'has the ability to adjust the automatic tracking of the second differential circuit; the scheme shown in Figure 27 is to feedback the result of the central processor operation through the digital-to-analog conversion circuit The secondary differential circuit is used as the reference potential, and the second differential circuit has an intelligent ability to be used. ' . r..... * ^ I > * »· / f V [0070] Different sizes and resolutions The resistance of the electrode of the display is generally 21 [above] at the connection point between the detection circuit and the electrode line on the touch screen. The touch signal is shunted due to the input impedance of the detection circuit, and the input impedance of the detection circuit is larger, and the touch is The smaller the shunting effect of the signal, the input impedance of the detection circuit is 2. When the touch signal is more than 5 times, the touch signal can reflect the touch action information, so the wheel-in impedance of the signal detection channel to the electrode line is required to be above π Q or 5 Κ Ω, as shown in Figures 25, 26 and 27, in the differential amplifier circuit and A buffer is added between the connection points of the electrode lines on the touch screen for the input impedance of the large detection circuit. 098142369 Form No. A0101 Page 29/77 Page 0993125395-0 201120845 [0071J Embodiment 17, $ The implementation of the ^ 14 and the fifteenth can also use the average to measure the touch display of the touch screen display of Figure 4. $ species = ^ method is, the axis (four) _ although "the average value of the touch signal Quantity result. Μ value measurement = material production method is slow, but 伽 就 就 除 除 除 除 除 , , , , 除 除 除 除 除 除 除 除 除 除 除 除 除 除 除 除 除 除 除 除 除 除 除 除 除 除 除 除A circuit structure for detection is shown in Figures 28, 29 and 30. The structure of the circuit is composed of a slap detection path, a turn signal, a control signal check channel, a data processing and a timing control circuit. Detecting ramps with buffer level-level differential placement The circuit, the effective acoustic measurement circuit and the second-order difference eight circuits; the data sampling channel has the emblem digital transfer path; the data processing and timing control circuit is a central processing unit (CPU, data processing capability, Becco output wheel input interface) MCU), the towel central processor has control software and data processing software. [0072] FIG. 28 is a structural diagram of a touch signal detecting circuit of a mean value measuring method, and 2810 is a signal of a touch signal sampling point. 2811 is a signal for detecting a reference point, and the signal 2810 of the touch signal sampling point and the signal 2811 of the detection reference point are buffered by the buffer 2820 and the buffer 2821, respectively, and are input signals of the first stage differential differential amplifying circuit unit 2822; The first-order differential differential amplifying circuit unit 2822 includes a frequency strobe circuit, and the strobe frequency of the strobe circuit is the frequency of the excitation source touch signal', and the strobe output is strobed, and the strobed output is used as an effective value. The input of converter 2823, the effective value of 2823 is output as the second stage differential amplifier 098142369 Form No. A0101 Page 30 / Total 77 Page 0993125395-0 201120845 2824 input; 2825 is the regulated voltage output, which is used as a reference potential, connected to the other input of the second stage differential amplifier 2824, used to subtract the bottom value of the 2823 rms output signal; the second stage differential amplifier 2824 output The analog to digital converters 2826, 2826 are synchronously sampled under the control of the synchronous control signal 2830 outputted by the central processing unit (CPU, MPU) 2827, and the sampled conversion result is sent to the central processing unit (CPU, MPU) 2827 'and then by the central The processor performs data processing and touch judgment. [0073] 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, 2911 is a signal for detecting a reference point, and a signal 2910 of a sampling point of the touch m is touched. And the signal 2911 for detecting the reference point is buffered by the buffer 39 of the buffer 39, and is used as the first-stage differential differential amplifying circuit, the military element 2 9 2 i_human signal; The differential differential amplifying circuit unit 2922 includes a frequency strobe circuit. The strobe frequency of the strobe circuit is the frequency of the excitation source touch signal, and the strobe output is strobed, and the strobe output is valid. The input value of the value converter 2923's input value '2923' is output as the input of the second-stage differential amplifier 2924; the feedback adjustment analogy|channel 2925 uses the output of the second-stage differential amplifier 2924 as a feedback input signal and automatically adjusts the output voltage. It is connected as a reference potential to the other input of the second stage differential amplifier 2924 for subtracting the bottom value of the 2923 rms output signal; the first stage differential amplifier 2924 outputs the analog to digital converter 2926, 2926 Simultaneous sampling under the control of the synchronous control signal 2930 outputted by the central processing unit (CPU, ΜΡϋ) 2927 'Sampling conversion result is sent to the central processing unit (CPU, MPU) 2927 'The data processing and touch by the central processing unit Judgment 098142369 Form No. A0101 Page 31 / Total 77 Page 0993125395-0 201120845 [0074] Figure 30 shows a structure of the touch signal detection circuit of the average value measurement method. 3010 is the signal of the touch signal sampling point. 3〇11 is the signal for detecting the reference point. The signal of the touch signal sampling point 3〇1〇 and the signal 3011 of the detection reference point are buffered by the buffer 3〇2〇 and the buffer 3〇21 respectively, as the first stage difference. The input signal of the differential amplifying circuit unit 3〇22; the first stage differential differential amplifying circuit unit 3022 includes a frequency strobe circuit, and the strobe frequency of the strobe circuit is the frequency of the excitation source touch signal, and the differential amplified output is performed. The strobe, the strobed output is then output as the rms value of the input ' 3023 of the rms converter 3023 as the input of the second stage differential amplifier 3024; the central processing unit (cpu, Μρϋ) 3〇27 According to the touch operation result, the adjustment data is sent to the digital-to-analog converter 3〇25, and the output voltage of the other 25 is used as the reference potential 'connected to the second-stage differential amplifier. The other input terminal of the 3024' is used to reduce The bottom value of the effective lean output signal of 3 〇 2 3; the second stage differential amplifier 3024 is rotated to the analog digital converter 3026, 3026 under the control of the synchronous control signal 3030 outputted by the central processing unit (CPU, MPU) 3027. Sampling with the same test, the sampling conversion result is sent to the central processing unit (CPU, ΜΡϋ) 302*7, and then the s central processing unit performs data processing and touch judgment. [0075] The difference between the three average measurement touch signal detection circuits shown in FIG. 28 'the 29th and 3rd is that the scheme shown in FIG. 28 is a manual method to set a reference for the secondary differential circuit. The potential has a basic adjustment capability for the second differential circuit; the scheme shown in Fig. 29 is that the output signal of the second differential circuit is fed back to the second differential circuit as a reference potential through the analog circuit, and the second differential circuit has automatic tracking. The adjustment scheme is shown in Figure 30. The result of the CPU operation is digital-to-analog conversion 098142369 Form No. A0101 Page 32 / Total 77 Page 0993125395-0 201120845 The circuit is fed back to the secondary differential circuit as the reference potential. The secondary differential circuit has intelligent adjustment capabilities. [0076] The display of different sizes and resolutions generally has an electrode resistance of more than two kilo ohms (2 Ω), and the touch signal is connected to the connection line of the detecting circuit and the electrode line on the touch screen due to the input impedance of the detecting circuit. The shunting, the larger the input impedance of the detection circuit, the smaller the shunting effect on the touch signal. When the input impedance of the detection circuit is 2.5 times or more, the touch signal can reflect the touch action information, so the input impedance of the signal detection channel to the electrode line is required to be 5 Κ or 5 Ω or more, such as 28, 29, and 30. In the figure, a buffer is added between the connection point of the differential amplifying circuit and the electrode line on the touch screen to increase the input impedance of the detecting circuit. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0077] In the fourteenth embodiment, we refer to the touch display 400 shown in FIG. 4, which uses a TFT-LCD, and the equivalent circuit of the measurement is shown in FIG. The touch excitation source 1810 is a square wave signal. Since the 1830 and 1831 are capacitive loads, the touch-activated square wave signal has 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. 21. To illustrate the present embodiment, the 21st icon number is now re-displayed as shown in Fig. 31. [0078] In the embodiment, the touch signal detection method uses a time characteristic measurement method to measure the time interval change between two predetermined potentials during charging and discharging of the touch signal sampling point 1841 to obtain touch information. As shown in FIG. 31, the time T423 between two predetermined potentials V422 and V421 during the charging process of the waveform of the touch signal sampling point 1841 is measured, and the time T424 between the two predetermined potentials V421 and V422 during the discharging process can be reflected. This capacitor is negative 098142369 Form No. A0101 Page 33 / Total 77 Page 0993125395-0 201120845 Changes in the load ° When the finger touches the display, the coupling capacitor 1831 of the equivalent circuit is generated, changing the capacitive load and time constant of the circuit. The time interval T423*T424 between the two established potentials has also changed. The measurement of the time interval Τ 423 and Τ 424 can obtain the touch signal. The predetermined potentials V421 and V422 select the two potentials of the sampling point 1841 during the charging and discharging process. [0079] 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-regulated output single-single, comparator, and smashing; the stipulation and the timing control circuit are central processing units with data computing capability and data wheel output interface ( CPU, MCU) 'The central processing unit has control software and data processing software. [0080] FIG. 3 is a structural diagram of a touch signal detecting circuit of a time characteristic halation method, wherein 3210 is a signal of a touch signal being sampled, and 3211 is a predetermined potential (V421), which is provided by a voltage regulating output unit 3220. The 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 is The signal 3210 of the sampling 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, MCU) 3235 generates the counting pulse signal 3240 of the counter 3234, and the output potential of the comparator 3233 is taken as The start signal of the counter 3234, the output potential of the comparator 3232 is used as the stop of the counter 3234 098142369 Form No. A0101 Page 34 / Total 77 page 0993125395-0 201120845 ϊ 数 ; 信号 ; (CPU, MCU) 3235 read, after the reading is completed by the central processor (cpu ', MCI03235 send clear signal 3241 clear The zero counter 3234 is prepared for the next reading and is processed by the central processing unit (CPU, MCU) 3235 for data processing and touch determination. [0081] Figure 33 is a touch signal detection method for time characteristic measurement. The circuit structure diagram, 3310 is the signal of the touch signal sampling point, and the central processing unit (cpu, MCU) 3327 outputs the corresponding data to the digital-to-analog converter 3320 through a program preset or history detection to output a predetermined potential 3311 (V421), Also rotate the data to the digital-to-analog converter 3321 to output a predetermined potential 3312 (V422); the touch point sample point 钧 number, 331 〇, 4 sounder 3322 buffer output 'with 3311 this set potential ratio, breaker 3324; the signal 3310 of the touch signal sampling point is buffered and outputted through 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 332β, and compares η2~ The output potential of the device 3325 is used as the start count signal of the counter '3326, and the output potential of the comparator 3324 is used as the stop count signal of the meter 3326; § after the timer 3326 stops counting The number is read by the central processing unit (cpu, MCU) 3327. After the reading is completed, the central processing unit (cpu, MCU) 3327 sends the clearing signal 3331 clearing counter 3326, which is ready for the next reading and is processed by the central processing center. (CPU, MCU) 3327 Data processing and touch judgment. The difference between the two types of time characteristic measurement touch signal detection shown in Fig. 32 and Fig. 33 is that the scheme shown in Fig. 32 is a manual method for setting two predetermined potentials V421*V422 to the comparator; Fig. 33 The program is composed of 098142369 Form No. A0101 Page 35 / Total 77 Page 0993125395-0 [0082] 201120845 The central processor sets two preset potentials V421 and V422 to the comparator, and the central processor presets by program or will measure the previous After the result is calculated, the corresponding data is output to the digital-to-analog conversion circuit, and the output is used as a predetermined comparison potential, and the setting of the predetermined comparison potentials V421 and V422 is intelligently adjusted. The nineteenth embodiment is different from the eighteenth embodiment. In this example, 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. 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 1810 and the touch signal waveform of the touch signal sampling point 1841 are as shown in FIG. [0084] In the embodiment, the touch signal detection method uses a phase shift measurement method to compare the phase movement of a specific phase point on the touch signal sampling point 1841 on different frame blanking periods to obtain touch information. It can be seen that the influence of the touch capacitance can be reflected by measuring the change of the 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, when the display has no finger touch. Because of the presence of the distributed capacitor 1830 in FIG. 18, 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 1840; when the finger touches the display, FIG. The coupling capacitor 1831 of the equivalent circuit shown is generated, which increases the capacitive load of the circuit, and the time T500 between the zero-crossing point on the touch signal sampling point 1841 and the zero-crossing point between the excitation sources becomes larger, that is, Further phase shift. Touch information can be obtained by measuring the change in time T500. According to the touch excitation 098142369 Form No. A0101 Page 36 of 77 0993125395-0 201120845 The potential of the specific phase point can be zero or other potential points. [0085] The circuit structure for realizing the phase shift measurement touch signal detection is as shown in FIGS. 34 and 35. 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 measurement 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 (CPU, which has a data computing capability and a data output input interface). MCU), the central processing unit has control software and data processing software. _] Figure 34 is a kind of phase shift feature detection and control control gas number detection, measurement circuit structure diagram, 3410 is touch signal sampling ^: 瓿号 ^ 3411 is a signal for detecting a reference point, 3412 is a potential corresponding to a specific phase point generated by the voltage adjustment output unit 342〇; a signal 3 4丨〇 of the touch signal sampling point is buffered and outputted through the buffer 3430, and 3412 The potential corresponding to the specific phase point enters the comparator 3432 to perform comparison; the signal 3411 of the touch signal sampling point is buffered by the buffer 3431, and the potential corresponding to the specific phase point of 34丨2 is entered into the comparator 3433 for comparison; The processor (cpu, MCU) 3435 generates a counter pulse signal 3440 of the counter 3434, and the output potential of the comparator 3433 is used as a start count signal of the counter 3434. The output potential of the device 3432 is used as the stop counting signal of the counter 3434; the reading of the counter 3434 is stopped by the central processing unit (cpu, MCU) 3435. After the reading is completed, it is sent out by the central processing unit (cpu, MCU) 3435. Zero signal 3441 clears the counter 3434 to prepare for the next reading and is processed and touched by the central processing unit (CPU, MCU) 3435 098142369 Form No. A0101 Page 37 of 77 0993125395-0 201120845 . [0087] 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, 3511 is a signal for detecting a reference point, and a central processing unit (CPU, MCU) The 3526 outputs the corresponding data to the digital-to-analog converter 3520 according to the program preset or the history detection judgment. The potential 3512 corresponding to the specific phase point is the output potential of the digital-to-analog converter 3520: the signal 3510 of the touch signal sampling point passes through the buffer 3521. The buffer 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 central processing _^CPU, MCU) 352, 6 generates the counter pulse signal 353 of the counter 3525, the output potential of the 0tb comparator 3524 is used as the start count signal of the counter 3525, and the output potential of the comparator 3523 is used as the stop count of the counter 3525. The signal is read by the central processing unit (CPU, MCU) 3526 after the stop of the counter 3525 count. After the reading is completed, the central processing unit (CPU, MCU) 3 526 sends the clear signal 3531 clear counter 3 5 25 for one reading.. Prepare, and the central processing unit (CPU, MCU) 3526 for data processing and touch judgment. [0088] The difference between the two phase shift measurement touch signal detections shown in FIG. 34 and FIG. 35 is that the scheme shown in FIG. 34 is to manually set the potential corresponding to a specific phase point; FIG. The display program is configured by the central processing unit to set a potential corresponding to a specific phase point through a digital-to-analog converter, and the central processing unit calculates the potential of the specific phase point by using a program preset or calculating the previous measurement result through a digital-to-analog converter. Intelligent adjustment of the setting of specific phase points. 098142369 Form No. A0101 Page 38 / Total 77 Page 0993125395-0 2Ό1 The phase characteristics of the touch signal measured in this embodiment are also substantially time [0090] r (one kind of feature. The specific embodiment is shown in Figure 4 The touch display 400 and the time-division multiplexed display electrodes complete the touch function. The touch display 400 uses a part or all of the N display electrode lines to divide and operate the touch sensing electrode lines in a single channel sequential scanning manner. Touch detection: The touch signal detection circuit has a touch signal detection channel or a data sampling channel, and sequentially scans the first and second of the N touch sensing electrode lines in a scanning manner. Until the last Nth touch sensing electrode line, complete the entire detection process of a detection frame, as shown in Figure 3. - [0091] This is also the most common and natural touch detection method. The twenty-first embodiment is different from the twenty-first embodiment. In this example, the first electrode of the N touch sensing electrodes and the i + Ι strip are detected by scanning at a predetermined interval i. , 2i + l ..... until the last Nth touch sensing electrode line, thus completing the entire detection process of a sounding frame. [0093] When i = 2, that is, a touch sensing electrode line is separated The schematic diagram of the detection scan is as shown in Fig. 37. [0094] The specific embodiment 22 is different from the twenty-first and twenty-second embodiments, and the example is touched by a single channel coarse sweep and fine sweep detection. Control detection: The touch signal detection circuit has a detection channel or a data sampling channel. The touch sensing electrode line is divided into several sections for each i-zone, and one partition is selected for each partition or 098142369 Form No. A0101 Page 39/ A total of 77 pages of 0993125395-0 201120845 multiple touch sensing electrode lines as the touch sensing electrode of the partition touch sensing electrode line for touch detection together, the best way is to put all the touch sensing electrodes in each partition The line is connected in parallel as a touch sensing representative electrode; the touch sensing representative electrode is detected by the area to determine the area where the touch action occurs; and then the subdivision is performed in the area where the touch action occurs. Trace detection 'gets more specific touch gongs. The purpose of this method is to save time for touch detection. [0095] When i = 3, the single-channel coarse sweep plus fine sweep detection scan is as shown in Figure 38. [0096] DETAILED DESCRIPTION OF THE INVENTION [Twenty-three] This example uses a multi-channel sequential scanning detection method for touch detection: the touch signal detection circuit has a plurality of touch signal detection channels and a plurality of data sampling channels, all of which are touched. The control sensing electrode line is divided into the same number of groups as the touch signal detecting channel, and each touch signal detecting channel is responsible for detecting in a touch sensing electrode group. [0097] In one solution, each touch signal detection channel simultaneously scans and scans in each group, and comprehensively detects the detection results of all the touch signal detection channels to obtain touch information of the full screen. Figure 39 is a schematic diagram of the scanning sequence when three touch signal detection channels are used. [0098] Another solution is that each touch signal detection channel simultaneously performs interval scan detection in each group, and comprehensively detects the detection results of all touch signal detection channels to obtain touch information of the full screen. Figure 40 is a schematic diagram of the scanning sequence when three touch signals are detected. [0099] Another solution is that each touch signal detection channel is simultaneously in the respective group 098142369 Form No. A0101 Page 40 / Total 77 Page 0993125395-0 201120845 Advance broadcast "a Advance rough knowledge plus detailed detection, comprehensive All the touch signals _ channel detection H get the full screen of the information. Figure 41 is the sweep sequence of the three touch signal detection channels. 举 ± 所述 所述 所述 所述 所述 所述 所述 举 举 ± ± ± The equivalent modifications and variations of the present invention are intended to be included in the scope of the appended claims. [FIG. 1] FIG. 1 is a TFT of the present invention. - a typical structural diagram of an LCD display;

2 is a schematic view showing the structure of a display sub-pixel of the TFT-LCD of the present invention. Fig. 3 is a timing diagram of the conventional display driving of the TFT-LCD liquid crystal display of the present invention; FIG. 4 is the present invention. The structure of the touch-axe display of the TFT-LCD display is Π5Π · group, the fifth figure is the timing diagram of the f-pole of the time-division multiplex display of the present invention; the sixth figure is the excitation of the clock S-transmission of the invention Signal waveform; "::/;:.. II 7 ta * > I 3 (@J , i'..I. 2 -, II H 1 ? Figure 7 is a 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; The touch excitation signal waveform diagram of the fifth embodiment of the present invention; 098142369 Form nickname A0101 Page 41 / Total 77 page 0993125395-0 201120845 The 11th figure is the touch excitation signal of the sixth embodiment of the present invention. Waveform diagram; Fig. 12 is a time-sharing method of the seventh embodiment and the eighth mode of the present invention. FIG. 13 is a waveform diagram of a touch excitation signal according to a seventh embodiment of the present invention; FIG. 14 is a sequence diagram of a molecular arrangement of a positive liquid crystal material in an external field according to the present invention; 15 is a sequence diagram of the molecular arrangement of the negative liquid crystal material in the external field of the present invention, and FIG. 16 is a timing chart of the time division multiplex display of the specific embodiment 9 of the present invention; FIG. 17 is a specific embodiment of the present invention. Embodiments of the time division multiplexed display electrode timing diagram of the embodiment; Figure 18 is an equivalent circuit diagram of the finger touch display of the present invention; Figure 19 is the touch signal leakage current Δi generated by the touch of the present invention Fig. 20 is an equivalent circuit diagram when the COM electrode of the present invention is placed on the upper substrate glass when the finger touches the display; and Fig. 21 is the square excitation of the touch excitation signal of the present invention. The touch signal waveform of the touch excitation source and the touch signal sampling point; the 22a, 22b, and 22c diagrams are the complete synchronization process of the touch detection when the touch excitation signal of the present invention is a square wave FIG. 23 is a touch signal waveform diagram of a touch excitation source and a touch signal sampling point when the touch excitation signal of the present invention is a sine wave; FIGS. 24a, 24b, and 24c are touches of the present invention. The excitation signal is sinusoidal 098142369 Form No. A0101 Page 42 / Total 77 Page 0993125395-0 201120845 Wave time, the schematic diagram of the complete synchronization process of touch detection; Figure 25 is the touch signal detection circuit structure of the instantaneous value measurement method of the present invention Figure 26 is a structural diagram of the touch signal detecting circuit of the instantaneous value measuring method of the present invention; Figure 27 is a structural diagram of the touch signal detecting circuit of the instantaneous value measuring method of the present invention; The structure of the touch signal detecting circuit of the rms measuring method of the invention; FIG. 29 is a structural diagram of the touch signal detecting circuit of the rms measuring method of the present invention; 'Into... FIG. 30 is the RMS measurement of the present invention. The structure of the touch signal detection circuit of the method; FIG. 31 is a time characteristic of the touch excitation signal of the present invention, which is a square wave and a touch signal sampling point; and FIG. 3 is a time characteristic of the present invention. The structure of the touch signal detecting circuit of the measuring method; the third drawing is the structure of the touch signal detecting circuit of the time characteristic measuring method of the present invention, and the 34th drawing is the touch signal detecting of the phase shift measuring method of the present invention. Circuit structure diagram; Figure 35 is a structural diagram of the touch signal detection circuit of the phase shift measurement method of the present invention; FIG. 36 is a schematic diagram of the detection order of the touch detection mode of the single channel sequential scan of the present invention, FIG. It is a touch detection method for single-channel interval scanning of the present invention. 098142369 Form No. A0101 Page 43/77 pages 0993125395-0 201120845 The order of measurement is not intended, and the 38th figure is a single-channel coarse sweep and fine sweep of the present invention. FIG. 39 is a schematic diagram of the detection sequence of the touch detection method for the multi-channel sequential scan of the present invention, and FIG. 40 is the detection sequence of the touch detection method for the multi-channel interval scan of the present invention. FIG. 41 is a schematic diagram showing the detection sequence of the multi-channel coarse sweep and fine sweep touch detection method according to the present invention. [Description of main component symbols] [0102] 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 100: TFT-LCD display; 110: TFT liquid crystal screen; 120: LCD screen horizontal scanning column electrode; 121, 122, 12m-l And 12m: scan electrode line (column electrode line); 130: liquid crystal screen vertical direction data row electrode; 131 and 13n: data electrode line (row electrode line); 140: common electrode (COM electrode); 150: on the liquid crystal screen Thin film transistor TFT; 160: liquid crystal molecular box corresponding to display pixel; 170: storage capacitor; 180: common electrode voltage source; 181: gate electrode of TFT-LCD; 098142369 182: source electrode of TFT-LCD (row electrode ) Driver; Form No. A0101 Page 44/77 Page 0993125395-0 201120845 183: Timing Controller; 400: Touch Display; 410: TFT-LCD Display 420: Sweeping Column Electrode in Horizontal Direction of TFT-LCD Display; 42m: column electrode line; 430: data line electrode in the vertical direction of the TFT-LCD display; 431 and 43n: row electrode line; 44G · · Common electrode layer of TFT-LCD display ((3) Μ electrode); 450. Thin film field effect transistor TFT on TFT-LCD display; 460: LCD cell corresponding to display pixel; 470: Storage enough; Taste, 48〇: COM The display drive of the electrode is dedicated to |r jx; 481: touch excitation source; two 482. COM signal gate rotation circuit; 483: column electrode display scan drive circuit; 484: column electrode touch circuit; First, 乂, 48δ: column electrode column zhentongtong 'out circuit; 486: row electrode display data drive ''circuit 487. row electrode touch circuit; 488: row electrode column signal strobe output circuit; 489: timing controller; 1810: touch excitation source; 1820: sampling resistor; 1821: equivalent resistance; 1830: distributed capacitance; 0993125395-0 1831: coupling capacitor; 098142369 form number A0101 page 45/77 page 201120845 1832 : Capacitance between display electrode and COM electrode 1 840 : detection reference point; 1841 : signal sampling point; 202 0 : sampling resistance; 2021 : equivalent resistance; 2030 : distributed capacitance; 2031 : coupling capacitance; 2032 : coupling capacitance; 2040: equivalent electricity Resistance; 2510: the signal of the touch signal sampling point;

2511: Signal to detect the reference point; — 'Zero-bubble, 2520 and 2521: Buffer; 2522: First-stage differential amplifier; 2523: Second-stage differential amplifier; 2524: Adjust voltage output; 2525: Analog-to-digital conversion 2526: central processing unit; 2530: synchronous control signal; 2610: signal for touch signal sampling point; 2611: signal for detecting reference point; 2620 and 2621: buffer; 2622: first stage differential amplifier; 2nd differential amplifier; 2624: analog circuit; 2625: analog to digital converter; 2626: central processing unit; 098142369 form number Α 0101 page 46 / total 77 page 0993125395-0 201120845" 630: 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 2730: synchronous control signal; '2810: signal of touch signal sampling point; .2811: signal for detecting reference point; 2820 and 2821: buffer; - 2822: first difference difference Amplifying circuit unit; • 2823: converter; 2824: second stage differential amplifier; 2825: regulating voltage output; 2826: analog digital converter; .--. ... p - j * :; -. = ... .., 2827: central processing unit; 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 amplifying circuit unit 2923: rms converter; 2924: second stage differential amplifier; 2925: feedback adjustment analog circuit; 098142369 form number A0101 page 47/total 77 page 0993125395-0 201120845 2926: analog to digital converter; 2927: central processing unit 2930: synchronous control signal; 3010: signal of touch signal sampling point; 3011: signal for detecting reference point; 3020 and 3021: buffer; 3022: first stage differential differential amplifying circuit unit; 3023: RMS converter; 3024: second stage differential amplifier; 3025: digital to analog converter; isilfc. fly_ί _ _ 3D26: analog digital converter; :; s_ 3027: central processing unit; '.: _s 3030: synchronous control signal ; 3210 : Touch Signal sampling point signal; 3211: set potential (V421); 3212: set potential (V422); 3220 and 3221: voltage regulation output unit; 3231: buffer; 3232 and 3233: comparator; 3234: counter; Processor; 3241: clear signal; 3310: touch signal sampling point signal; 3311: set potential (V421); 3312: set potential (V422); 3320 and 3321: digital-to-analog converter; 098142369 form number A0101 Page / Total 77 pages 0993125395-0 201120845^322^3323 : ; 3324 and 3325: comparator; 3326: counter; 3327: central processing unit; and 3331: clear signal.

098142369 Form No. A0101 Page 49 of 77 0993125395-0

Claims (1)

201120845 VII. Patent application scope: 1. A touch display capable of eliminating display affecting touch, comprising an active liquid crystal display, a display driving circuit, a touch circuit, and at least one display electrode for display driving a display/touch signal strobe output circuit or a display/touch signal loading circuit for touch detection; the touch circuit has a touch excitation source and a touch signal detection circuit; The signal strobe output circuit enables each display electrode or communicates with the display driving circuit to display a driving signal, or communicates with the touch circuit to transmit a touch signal, thereby applying the display electrodes to the display by using time division multiplexing method Driving and touch detection: the display/touch signal loading circuit causes the display electrode to simultaneously transmit the display driving signal and the touch signal, and the display driving and the touch detection share the display electrode simultaneously; and the active liquid crystal display An active device array and a column of electrode groups connecting the active device array on at least one substrate a row of electrode groups having a common electrode on the other substrate of the active liquid crystal display; wherein, after the normal display period is over, applying on some or all of the row and column electrode lines of the active liquid crystal display and the common electrode a liquid crystal pre-drive signal, the liquid crystal pre-drive signal is sized such that a potential difference between each of the row and column electrode lines to which the liquid crystal pre-drive signal is applied is opposite to a saturation drive voltage of the liquid crystal, so that The liquid crystal molecules between the row and column electrode lines of the liquid crystal pre-drive signal and the common electrode are in a certain arrangement state, and the influence of the display content change on the touch signal detection is excluded. 098142369 Form No. A0101 Page 50 of 77 0993125395-0 201120845 _ . If the display of the scope of the application for the patent item is covered by +, the touch is affected by the touch control, and the T is on the active liquid crystal _ pole line And a part or all of the two rows on the common electrode are applied to different two, crystal pre-drive signals, and the liquid crystal pre-drive line is applied on the same electrode line: each row of the column also has a knowledge 4 During the period of the motion, the public power is applied at the moment when the patent is applied to: the liquid crystal pre-drive signal. The display, wherein: the touch pole line on the touch-sensitive effect display and the part or all of the row of the 1=moving liquid crystal display are applied to the active _^, $ The signal is on some or all of the row and column electrodes of the 2 display and the male drive: Γ liquid crystal pre-drive, "the street passes the liquid crystal prognosis ^ the predetermined electrode line applies the touch and detects the change of the touch signal on the electrode line. 1 4 The touch display capable of eliminating the touch influence display according to the first aspect of the patent, wherein the liquid crystal pre-applied on part or all of the row electrode lines of the active liquid crystal display and the common electrode Driving the signal, when applying the touch signal to each of the row and column electrode lines; or after applying the touch signal to each of the pair of row and column electrode lines, and partially or completely arranging the electrode lines on the active liquid crystal display The liquid crystal pre-drive signal is applied to the common electrode, and after the liquid crystal pre-drive signal is applied, the change of the touch signal on the electrode line to which the liquid crystal pre-drive signal is applied is detected. 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 active liquid crystal display is a thin film field effect transistor array, and the column electrode lines are respectively connected The gate and the source of the thin film field effect transistor, or the gate and the drain of the thin film field effect transistor, respectively, are connected to the thin film field effect transistor source 098142369 Form No. A0101 Page 51 of 77 Page 0993125395-0 201120845 or the electrode line of the drain electrode has a period of simultaneous application of the liquid crystal pre-drive signal. 6. The touch display capable of eliminating the touch influence display according to the first aspect of the patent application, wherein The liquid crystal pre-driving signal is applied to some or all of the row electrode lines of the active liquid crystal display and the common electrode, and is an active device in which all or part of the row and column electrode lines are connected to the display pixels on the active liquid crystal display. The time period in the cut-off state. 7. The touch display capable of eliminating the touch influence display as described in the first application of the patent application scope, The liquid crystal pre-drive signal is applied during an on-state period of an active device connected to the display pixel on the active liquid crystal display. 8. The touch that can eliminate the touch-sensitive display according to the first application of the patent application scope The display, wherein the liquid crystal pre-drive signal and the touch signal are simultaneously applied to the display pixel in the active liquid crystal display - the active state of the active weapon is simultaneously applied. 9. The patent application scope 7 or 8 The touch display capable of eliminating the touch effect display, wherein the active device array on the active liquid crystal display is a thin film field effect transistor array, and the thin film field effect transistor connected to the display pixel During the on-state period, the liquid crystal pre-drive signal is applied to the row electrode line and the common electrode connecting the source/gate electrode of the thin film field effect transistor. 10. The touch display capable of eliminating a touch influence display according to the first, seventh or eighth aspect of the patent application, wherein the liquid crystal is applied on the column or the row electrode group or the common electrode The pre-drive signal is one of an AC signal, a DC signal, and an AC and DC mixed signal. 11. A touch display capable of eliminating a touch influence display according to the first, seventh or eighth aspect of the patent application, wherein the active liquid crystal display is applied to the active liquid crystal display 098142369 Form No. A0101 Page 52 of 77 0993125395-0 201120845, the liquid crystal pre-drive signal on the η electrode and the touch signal are alternating signals with the same frequency or waveform. Item 'Item 7 or Item 8 can exclude the touch 曰 ", the touch of the page is not 2', wherein the frequency of the liquid crystal signal is l 〇 kHz or more. 098142369 Form No. A0101 Page 53 of 7 Page 0993125395-0