CN102999219B - A kind of Transflective in-cell touch panel, its driving method and display device - Google Patents
A kind of Transflective in-cell touch panel, its driving method and display device Download PDFInfo
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- CN102999219B CN102999219B CN201210507244.XA CN201210507244A CN102999219B CN 102999219 B CN102999219 B CN 102999219B CN 201210507244 A CN201210507244 A CN 201210507244A CN 102999219 B CN102999219 B CN 102999219B
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Abstract
The invention discloses a kind of Transflective in-cell touch panel, its driving method and display device, transmission area and echo area are set in each pixel cell, the thickness of the liquid crystal layer of transmission area is greater than the thickness of the liquid crystal layer of echo area, and tft array substrate arranges optical retarder and reflection horizon in the region that echo area is corresponding; The liquid crystal layer different due to thickness can have different delayed-actions to light after powered up, optical retarder can compensate the light delay difference caused thus, make the echo area in a pixel cell and transmission area electric field open with the state of closing under GTG can be kept consistent, reach Transflective display effect.Color membrane substrates arranges touch-control sensing electrode, touch-control drive wire is set between the pixel cell of the adjacent column on tft array substrate, realize touch controllable function, and adopt timesharing type of drive at touch-control and display stage, to reduce the mutual interference of display and touch-control, improve picture quality and touch-control accuracy.
Description
Technical field
The present invention relates to display technique field, particularly relate to a kind of Transflective in-cell touch panel, its driving method and display device.
Background technology
Along with the develop rapidly of display technique, touch-screen (TouchScreenPanel) is gradually in the life of people.At present, touch-screen can be divided into according to composition structure: external hanging type touch-screen (AddonModeTouchPanel), covering surfaces formula touch-screen (OnCellTouchPanel) and In-cell touch panel (InCellTouchPanel).Wherein, external hanging type touch-screen is by touch-screen and LCDs (LiquidCrystalDisplay, LCD) separately produce, then fitting to the LCDs becoming together and have touch function, there is the shortcomings such as cost of manufacture is higher, light transmission rate is lower, module is thicker in external hanging type touch-screen.And the touch control electrode of touch-screen is embedded in LCDs inside by In-cell touch panel, can the thickness of thinning module entirety, greatly can reduce again the cost of manufacture of touch-screen, be subject to the favor of Ge great panel producer.
Liquid crystal panel is passive luminescent device, and it can be divided into according to lighting source: reflective, transmission-type and Transflective.Wherein, reflection type liquid crystal panel utilizes the surround lighting around liquid crystal panel to be used as lighting source, the reflecting surface for reflect ambient light is provided with in reflection type liquid crystal panel, reflection type liquid crystal panel does not have backlight due to self, its power consumption is relatively low, but when surround lighting is around partially dark, picture is not easily watched, with the many restrictions used.Transmissive liquid crystal panel arranges backlight at the back side of thin-film transistor array base-plate, the debugging of the bias light permeate crystal panel utilizing backlight to send, and display needs picture, owing to needing the electric energy providing backlight, makes its power consumption relatively high.
And transflective liquid crystal panel combines the feature of transmission-type and reflection type liquid crystal panel, possess backlight and reflection horizon simultaneously, both the backlight of self can have been utilized in use also can to utilize surround lighting, have both advantages concurrently, no matter under high light or under dim environment, good viewing quality can be provided to user.
At present, the design based on the In-cell touch panel of transflective liquid crystal display technique is not also had in prior art.
Summary of the invention
Embodiments provide a kind of Transflective in-cell touch panel, its driving method and display device, in order to realize the in-cell touch panel under semi-transparent semi-reflecting display mode.
Embodiments provide a kind of Transflective in-cell touch panel, comprising: color membrane substrates, thin film transistor (TFT) tft array substrate, and the liquid crystal layer between described color membrane substrates and described tft array substrate; Be formed with multiple pixel cells of the arrangement in matrix in described Transflective in-cell touch panel, each pixel cell is provided with transmission area and echo area;
The thickness of the liquid crystal layer of described transmission area is greater than the thickness of the liquid crystal layer of described echo area; And described tft array substrate is provided with optical retarder and metallic reflector in echo area; Described optical retarder is for compensating the light delay caused by the thickness difference of the liquid crystal layer of the liquid crystal layer of described transmission area and described echo area;
Described color membrane substrates has many touch-control sensing electrodes that the line direction along pixel cell extends;
Described tft array substrate has many touch-control drive wires of the gap location between the pixel cell of adjacent column, the data signal line mutually insulated in each described touch-control drive wire and tft array substrate.
Embodiments provide a kind of display device, comprise the Transflective in-cell touch panel that the embodiment of the present invention provides.
Embodiments provide a kind of driving method of above-mentioned Transflective in-cell touch panel, comprising:
Time touch-screen being shown each frame is divided into displaying time section and touch-control time period;
In displaying time section, successively scanning gate signal is applied to the every bar signal line in described touch-screen, grayscale signal is applied to data signal line, control liquid crystal molecule upset; Meanwhile, touch-control sensing electrode ground connection, touch-control drive wire no signal inputs;
In the touch-control time period, apply touch scanning signals to touch-control drive wire, the voltage signal of touch scanning signals described in touch-control sensing electrode coupling also exports, meanwhile, and the every bar signal line in described touch-screen and the input of data signal line no signal.
The beneficial effect of the embodiment of the present invention comprises:
A kind of Transflective in-cell touch panel, its driving method and display device that the embodiment of the present invention provides, transmission area and echo area are set in each pixel cell, the thickness of the liquid crystal layer of transmission area is greater than the thickness of the liquid crystal layer of echo area, tft array substrate arranges optical retarder and reflection horizon in the region that echo area is corresponding, and optical retarder is for compensating the light delay caused by the thickness difference of the liquid crystal layer of transmission area and the liquid crystal layer of echo area; In procedure for displaying, because transmission area is different with the thickness of the liquid crystal layer of echo area, after energising, the liquid crystal layer of different-thickness can have different delayed-actions to light, optical retarder is set in echo area and can compensates the light delay difference caused thus, the light transmission rate of the echo area in a pixel cell and transmission area is mated mutually, further, electric field open with the state of closing under GTG in a pixel cell can be kept consistent, thus reach Transflective display effect.Color membrane substrates arranges touch-control sensing electrode, on tft array substrate adjacent column pixel cell between gap location the touch-control drive wire insulated with data signal line is set, timesharing driving is carried out, with compatible touch controllable function and display effect to touch-control drive wire and touch-control sensing electrode.Further, owing to adopting timesharing type of drive at touch-control and display stage, the mutual interference of display and touch-control can be reduced, improve picture quality and touch-control accuracy.
Accompanying drawing explanation
The structural representation of Transflective in-cell touch panel when not being energized that Fig. 1 a provides for the embodiment of the present invention;
The light simulation drawing of Transflective in-cell touch panel when not being energized that Fig. 1 b provides for the embodiment of the present invention;
Structural representation after the Transflective in-cell touch panel energising that Fig. 2 a provides for the embodiment of the present invention;
Light simulation drawing after the Transflective in-cell touch panel energising that Fig. 2 b provides for the embodiment of the present invention;
The schematic top plan view of tft array substrate in the Transflective in-cell touch panel that Fig. 3 provides for the embodiment of the present invention;
The working timing figure of the Transflective in-cell touch panel that Fig. 4 provides for the embodiment of the present invention;
The schematic top plan view of public electrode pattern in the Transflective in-cell touch panel that Fig. 5 provides for the embodiment of the present invention;
Color membrane substrates in the Transflective in-cell touch panel that Fig. 6 provides for the embodiment of the present invention and tft array substrate are to one of structural representation after box;
Color membrane substrates in the Transflective in-cell touch panel that Fig. 7 provides for the embodiment of the present invention and tft array substrate are to the structural representation two after box.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of Transflective in-cell touch panel, its driving method and display device that the embodiment of the present invention provides is described in detail.
In accompanying drawing, the thickness of each layer film and shape do not reflect the actual proportions of array base palte and color membrane substrates, and object just signal illustrates content of the present invention.
The schematic top plan view of tft array substrate in the horizontal section schematic diagram of the capacitance type in-cell touch panel that the embodiment of the present invention provides and touch-screen is respectively shown in Fig. 1 a and Fig. 3.As shown in Fig. 1 a and Fig. 3, the Transflective in-cell touch panel that the embodiment of the present invention provides specifically comprises: color membrane substrates 1, thin film transistor (TFT) tft array substrate 2, and the liquid crystal layer 3 between color membrane substrates 1 and tft array substrate 2, be formed with multiple pixel cells 4 of the arrangement in matrix in Transflective in-cell touch panel, each pixel cell is provided with transmission area and echo area;
The thickness of the liquid crystal layer 3 of transmission area is greater than the thickness of the liquid crystal layer 3 of echo area; And tft array substrate 2 is provided with optical retarder 5 and metallic reflector 6 in echo area; Optical retarder 5 is for compensating the light delay caused with the thickness difference of the liquid crystal layer 3 of echo area by the liquid crystal layer 3 of transmission area;
Color membrane substrates 1 has many touch-control sensing electrodes 7 that the line direction along pixel cell 4 extends;
Tft array substrate 2 has many touch-control drive wires 8 of the gap location between the pixel cell 4 of adjacent column, each touch-control drive wire 8 and data signal line 9 mutually insulated in tft array substrate 1.
A kind of Transflective in-cell touch panel that the embodiment of the present invention provides, transmission area and echo area are set in each pixel cell, the thickness of the liquid crystal layer of transmission area is greater than the thickness of the liquid crystal layer of echo area, tft array substrate arranges optical retarder and reflection horizon in the region that echo area is corresponding, and optical retarder is for compensating the light delay caused by the thickness difference of the liquid crystal layer of transmission area and the liquid crystal layer of echo area; In procedure for displaying, because transmission area is different with the thickness of the liquid crystal layer of echo area, after energising, the liquid crystal layer of different-thickness can have different delayed-actions to light, optical retarder is set in echo area and can compensates the light delay difference caused thus, the light transmission rate of the echo area in a pixel cell and transmission area is mated mutually, further, electric field open with the state of closing under GTG in a pixel cell can be kept consistent, thus reach Transflective display effect.
In the specific implementation, the thickness of liquid crystal layer of transmission area is generally the twice of the thickness of liquid crystal layer of echo area; Optical retarder is generally quarter-wave optical retarder; In each pixel cell, the area of metallic reflector generally accounts for the half of open areas.
Brief description is carried out to the semi-transparent semi-reflecting principle of work of above-mentioned Transflective touch-screen below, particularly, the twice of the thickness of liquid crystal layer of echo area that is all that to take optical retarder as the thickness of liquid crystal layer of quarter-wave (λ/4) optical retarder and transmission area be below is that example is described.
As shown in Figure 1a; in the one side of color membrane substrates 1 liquid crystal layer 3 dorsad, the first polaroid 10 can be set usually; in the one side of tft array substrate 2 liquid crystal layer 3 dorsad, the second polaroid 11 can be set usually; be set to along the horizontal plane by the light transmission direction of principal axis of the first polaroid 10, it is inside that the light transmission direction of principal axis of the second polaroid 11 is set to vertical paper.At color membrane substrates 1, first alignment films 12 can be set usually towards the one side of liquid crystal layer, at tft array substrate 2, second alignment films 13 can be set usually towards the one side of liquid crystal layer 3, the frictional direction of the first alignment films 12 and the second alignment films 13 is set to along the horizontal plane.
As shown in Figure 1a, when the non-making alive of touch-screen, transmission area and echo area (in Fig. 1 a shown in wire frame) are all in details in a play not acted out on stage, but told through dialogues, its concrete light simulation drawing is as shown in Figure 1 b: in echo area, due to the first polaroid 10 light transmission direction of principal axis along the horizontal plane, surround lighting is by generating horizontal direction linearly polarized light after the first polaroid 10; Due to liquid crystal molecules parallel orientation in the liquid crystal layer 3 of echo area, horizontal direction linearly polarized light after liquid crystal layer 3 without delayed-action; Horizontal direction linearly polarized light becomes left circularly polarized light after the phase delay of λ/4 optical retarder 5; Left circularly polarized light reflects to form right-circularly polarized light through metallic reflector 6; After λ/4 optical retarder 5, right-circularly polarized light forms vertical direction linearly polarized light; Vertical direction linearly polarized light after the liquid crystal layer 3 of echo area without delayed-action, now the polarization direction of vertical direction linearly polarized light is mutually vertical with the light transmission direction of principal axis of the first polaroid 10, thus echo area formed details in a play not acted out on stage, but told through dialogues.In transmission area, because the vertical paper of light transmission direction of principal axis of the second polaroid 11 is inside, the backlight that backlight sends acts on through the second polaroid 11 and generates vertical direction linearly polarized light; Due to liquid crystal molecules parallel orientation in the liquid crystal layer 3 of transmission area, vertical direction linearly polarized light after liquid crystal layer without delayed-action, now the polarization direction of vertical direction linearly polarized light is mutually vertical with the light transmission direction of principal axis of the first polaroid 10, thus forms details in a play not acted out on stage, but told through dialogues in transmission area.
When liquid crystal panel making alive, liquid crystal molecule in the liquid crystal layer 3 of transmission area and echo area deflects arrangement under the effect of field effect, phase delay is there is in polarized light when the liquid crystal molecule by deflecting, as shown in Figure 2 a, because transmission area is different with liquid crystal layer 3 thickness of echo area, they are also different to the carryover effects of polarized light, play λ/2 light delay effect at the liquid crystal layer 3 of transmission area, play λ/4 light delay effect at the liquid crystal layer 3 of echo area.
After liquid crystal panel making alive, transmission area and echo area are all in bright field, its concrete light simulation drawing is as shown in Figure 2 b: in echo area, due to the first polaroid 10 light transmission direction of principal axis along the horizontal plane, surround lighting is by generating horizontal direction linearly polarized light after the first polaroid 10; Liquid crystal layer 3 due to echo area plays λ/4 light delay effect, and horizontal direction linearly polarized light becomes left circularly polarized light after the phase delay of the liquid crystal layer 3 of echo area; Left circularly polarized light becomes horizontal direction linearly polarized light after the phase delay of λ/4 optical retarder 5; Horizontal direction linearly polarized light, through the reflection of metallic reflector 6 and after λ/4 optical retarder 5, forms left circularly polarized light; Left circularly polarized light becomes horizontal direction linearly polarized light after the phase delay of the liquid crystal layer 3 of echo area, and now the polarization direction of horizontal direction linearly polarized light is parallel with the light transmission direction of principal axis of the first polaroid 10, thus forms bright field in echo area.In transmission area, because the vertical paper of light transmission direction of principal axis of the second polaroid 11 is inside, the backlight that backlight sends acts on through the second polaroid 11 and generates vertical direction linearly polarized light; Liquid crystal layer 3 due to transmission area plays λ/2 light delay effect, vertical direction linearly polarized light becomes horizontal direction linearly polarized light after the phase delay of the liquid crystal layer 3 of transmission area, now the polarization direction of horizontal direction linearly polarized light is parallel with the light transmission direction of principal axis of the first polaroid 10, thus forms bright field in transmission area.
The above-mentioned touch-screen that the embodiment of the present invention provides is on the basis realizing semi-transparent semi-reflecting display effect, color membrane substrates arranges touch-control sensing electrode, on tft array substrate adjacent column pixel cell between gap location the touch-control drive wire insulated with data signal line is set, timesharing driving is carried out, with compatible touch controllable function and display effect to touch-control drive wire and touch-control sensing electrode.Further, owing to adopting timesharing type of drive at touch-control and display stage, the mutual interference of display and touch-control can be reduced, improve picture quality and touch-control accuracy.
Particularly, the driving method of the above-mentioned Transflective in-cell touch panel that the embodiment of the present invention provides, sequential chart as shown in Figure 4, specifically comprises:
First, time touch-screen being shown each frame (Vsync) is divided into displaying time section (Display) and touch-control time period (Touch), in driver' s timing figure such as shown in Fig. 4, the time of display one frame of touch-screen is 16.67ms, choose wherein 4ms as the touch-control time period, other 12.67ms is as displaying time section, according to the duration of suitable both the adjustment of the processing power of IC chip, can certainly be not specifically limited at this.
At displaying time section (Display), to every bar signal line G1, G2 in touch-screen ... Gn applies scanning gate signal successively, applies grayscale signal to data signal line Data, controls liquid crystal molecule upset; Be as good as with normal ADS type liquid crystal panel principle of work during this period of time.In displaying time section, touch-control sensing electrode Rx ground connection, namely loads 0V voltage, and touch-control drive wire Tx no signal inputs.
At touch-control time period (Touch), to touch-control drive electrode Tx apply touch scanning signals, touch-control sensing electrode Rx be coupled touch scanning signals voltage signal and export.By the touch of finger, change the inductance capacitance between the electrode of position, touch point two, thus change the size of the end receiver voltage signal of touch-control sensing electrode Rx, realize touch controllable function.In the touch-control time period, the every bar signal line in touch-screen and the input of data signal line no signal.
The above-mentioned touch-screen that the embodiment of the present invention provides goes for the lcd technology of various pattern, such as go for the plane internal switch (IPS that can realize wide viewing angle, and senior super dimension field switch (ADS In-PlaneSwitch), AdvancedSuperDimensionSwitch) type lcd technology, also traditional twisted-nematic (TN is gone for, TwistedNematic) type lcd technology, does not limit at this.
Below the concrete structure of the touch-control drive wire realizing touch controllable function in above-mentioned touch-screen is described in detail.
In the specific implementation, data signal line in touch-control drive wire and tft array substrate can be arranged with layer, like this, do not need when preparing tft array substrate to increase extra preparation section, only need the figure that can be formed data signal line and touch-control drive electrode by patterning processes, preparation cost can be saved, improving product added value.And, in order to avoid the crosstalk between signal, when data signal line and touching signals line are arranged with layer, as shown in Figure 3, generally touch-control drive wire 8 and data signal line 9 are separately positioned on the both sides of pixel cell 4, to avoid touch-control drive wire 8 and data signal line 9, signal disturbing occur.
Usually, the precision of touch-screen is usually at grade, the density of touch-control drive wire and touch-control sensing electrode and width can be selected to ensure required touch accuracy according to required touch accuracy, usually during design touch-control drive wire, can the spacing between each touch-control drive wire is set to identical.
Particularly, because touch-control drive wire and data signal line are all arranged between the pixel cell of adjacent column, and the gap usually between pixel cell generally only has 5 microns, therefore, the width of each bar touch-control drive wire is also very thin, and this will cause the coupling capacitance between touch-control drive wire and touch-control sensing electrode relatively little.In order to ensure that the coupling capacitance between touch-control drive wire and touch-control sensing electrode reaches required numerical value, general at about 3pF, touch-control drive wire can be electrical connected by via hole by the metallic reflector in the pixel cell adjacent with at least one, as shown in Figure 3, in the touch-control time period, the metallic reflector 6 be electrical connected with touch-control drive wire 8 can increase the area of touch-control sensing, ensures the coupling capacitance needed for touch-control.In the specific implementation, generally according to required coupling capacitance, the quantity of the metallic reflector selecting concrete touch-control drive wire to connect, does not limit at this.
Usually, on the array base palte of tradition ADS type liquid crystal panel, public electrode is positioned at lower floor's (closer to underlay substrate) as plate electrode, and pixel electrode is positioned at upper strata (closer to liquid crystal layer) as gap electrode, between pixel electrode and public electrode, be provided with insulation course.And on the array base palte of HADS type liquid crystal panel, pixel electrode is positioned at lower floor's (closer to underlay substrate) as plate electrode, public electrode is positioned at upper strata (closer to liquid crystal layer) as gap electrode, between pixel electrode and public electrode, be provided with insulation course.
Particularly, in order to ensure the normal display of touch-screen, according to the pattern of the display panels of above-mentioned touch-screen embody rule, the particular location of metallic reflector can be set.
Such as: in the touch-screen of HADS pattern, as shown in Figure 1a, namely tft array substrate has the public electrode 15 be positioned at above pixel electrode 14, and public electrode 15 has slit-shaped transparent electrode structure in the position corresponding with the open area of pixel cell; In each pixel cell, metallic reflector 6 can be positioned at the below of public electrode 15 and be electrical connected with pixel electrode 14.In the specific implementation, metallic reflector 6 can be set directly at (as shown in Figure 1a) or below above pixel electrode 14, does not limit at this.In displaying time section, the metallic reflector be electrical connected with pixel electrode, as a part for pixel electrode, produces multi-dimensional electric field with the public electrode of top, controls liquid crystal upset.
Further, in HADS pattern, when touch-control drive wire and data signal line are arranged with layer, can be blocked by the public electrode closer to liquid crystal layer, be unfavorable for the touch-control sensing electrode detector touch scanning signals be arranged on color membrane substrates.Therefore, in order to ensure touch scanning signals that touch-control drive wire applies more easily by touch-control sensing electrode detector to, public electrode can be set to engraved structure in the position corresponding with touch-control drive wire, namely public electrode arranges the pattern without public electrode in the position corresponding with touch-control drive wire, as shown in the B region in Fig. 5.
In the touch-screen of ADS pattern, namely tft array substrate has the public electrode be positioned at below pixel electrode, the pixel cell adjacent with touch-control drive wire arranges the public electrode that has and other pixel cells arrange the public electrode mutually insulated had, and pixel electrode has slit-shaped transparent electrode structure in the position corresponding with the open area of pixel cell; In each pixel cell, metallic reflector is positioned at the below of pixel electrode and is electrical connected with public electrode.In the specific implementation, metallic reflector can be set directly at above or below public electrode, does not limit at this.In displaying time section, the metallic reflector be electrical connected with public electrode, as a part for public electrode, produces multi-dimensional electric field with the pixel electrode of top, controls liquid crystal upset.Further, in the touch-control time period, mutually insulated between the public electrode be connected with each touch-control drive wire by metallic reflector and other public electrodes, can not produce the crosstalk of touching signals.
Below the concrete structure of the touch-control sensing electrode realizing touch controllable function in above-mentioned touch-screen is described in detail.
In the specific implementation, touch-control sensing electrode between the substrate of color membrane substrates and black matrix area, also can be positioned at the one side of black matrix area towards liquid crystal layer of color membrane substrates, can also be positioned at the one side of color membrane substrates liquid crystal layer dorsad.
At present, in display panels, in procedure for displaying, outer signals is to the interference of display, and generally all can arrange shielding electrode layer in the one side of color membrane substrates liquid crystal layer dorsad, this shielding electrode layer is whole setting.The above-mentioned touch-screen that the embodiment of the present invention provides in the specific implementation, can according to required touch accuracy, as shown in Figure 6, shielding electrode layer (shieldingITO) on color membrane substrates is divided into the touch-control sensing electrode Rx of suitable width, generally, the width of every bar touch-control sensing electrode Rx is good at 5 ~ 6mm.Further, the precision of touch-screen is usually at grade, and the precision of LCDs is usually at micron order, and the precision can finding out needed for display is far longer than the precision needed for touch-control, and therefore, general every bar touch-control sensing electrode all can corresponding multirow pixel cell.
Within the touch-control time period of a frame, touch-control drive electrode Tx transmits touch scanning signals, each touch-control sensing electrode Rx be coupled touch scanning signals voltage signal and export, in displaying time section, each touch-control sensing electrode Rx can ground connection, shielding outer signals, to the interference of display, plays the effect of guarded electrode.
Further, in order to reduction processing can be carried out to box body after color membrane substrates and tft array substrate are to box, namely the exposed underlay substrate in outside of particular liquid etching is used, shielding electrode layer can be produced on the one side of color membrane substrates towards liquid crystal layer, particularly, each touch-control sensing electrode Rx of composition shielding electrode layer can be arranged between the substrate of color membrane substrates and black matrix area, also can be positioned at the one side of black matrix towards liquid crystal layer.When touch-control sensing electrode Rx is arranged between the substrate of color membrane substrates and black matrix area, be more conducive to the interference shielding outer signals.
When touch-control sensing electrode is positioned at the one side of color membrane substrates liquid crystal layer dorsad, because the spacing between touch-control sensing electrode and touch-control drive electrode is larger, therefore, as shown in Figure 6, directly each bar touch-control sensing electrode Rx can be prepared into planar structure and can ensure that coupling capacitance is in suitable scope.
When each touch-control sensing electrode is positioned at color membrane substrates towards the one side of liquid crystal layer, because the spacing between touch-control sensing electrode and touch-control drive electrode is less, in order to ensure that coupling capacitance improves the feasibility of touch-control in suitable scope, as shown in Figure 7, each bar touch-control sensing electrode Rx can be designed to have grid electrode structure, and the pattern of each touch-control sensing electrode is covered by black matrix area, black matrix so just can be utilized to hide the fenestral fabric of touch-control sensing electrode, can not have an impact to the aperture opening ratio of display, also can not affect the light transmission rate of display.
Particularly, because the touch-control sensing electrode of fenestral fabric that arranges on color membrane substrates can not occluded pixels unit, therefore, the material of touch-control sensing electrode can be specially transparent conductive oxide such as ITO or IZO, also can being metal, its resistance can being effectively reduced when adopting metal to make touch-control sensing electrode.
In addition, when arranging touch-control drive wire and touch-control sensing electrode, in order to reduce connected IC chip cost, by adjacent multiple touch-control drive wires to be passed through the mode of wire conducting in either end, the quantity that each driving touch-control line provides the driving passage (channel) of electric signal can be reduced to; Meanwhile, by adjacent multiple touch-control sensing electrodes to be passed through the mode of wire conducting in either end, the quantity with the induction channels (channel) of each touch-control sensing Electrode connection can be reduced.Such as, resolution is the touch-screen of 1280*800, can consider that the touch-control drive wire every 120 pixels comprised is by wire conducting, as a touch-control drive wire, using the touch-control sensing electrode of 100 length in pixels as a touch-control sensing electrode, therefore, the channel interface of 10 touch-control drive wires is altogether only needed, the channel interface of 8 touch-control sensing electrodes, reduces the requirement to IC chip.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of display device, comprise the above-mentioned Transflective in-cell touch panel that the embodiment of the present invention provides, the enforcement of this display device see the embodiment of above-mentioned Transflective in-cell touch panel, can repeat part and repeats no more.
A kind of Transflective in-cell touch panel, its driving method and display device that the embodiment of the present invention provides, transmission area and echo area are set in each pixel cell, the thickness of the liquid crystal layer of transmission area is greater than the thickness of the liquid crystal layer of echo area, tft array substrate arranges optical retarder and reflection horizon in the region that echo area is corresponding, and optical retarder is for compensating the light delay caused by the thickness difference of the liquid crystal layer of transmission area and the liquid crystal layer of echo area; In procedure for displaying, because transmission area is different with the thickness of the liquid crystal layer of echo area, after energising, the liquid crystal layer of different-thickness can have different delayed-actions to light, optical retarder is set in echo area and can compensates the light delay difference caused thus, the light transmission rate of the echo area in a pixel cell and transmission area is mated mutually, further, electric field open with the state of closing under GTG in a pixel cell can be kept consistent, thus reach Transflective display effect.Color membrane substrates arranges touch-control sensing electrode, on tft array substrate adjacent column pixel cell between gap location the touch-control drive wire insulated with data signal line is set, timesharing driving is carried out, with compatible touch controllable function and display effect to touch-control drive wire and touch-control sensing electrode.Further, owing to adopting timesharing type of drive at touch-control and display stage, the mutual interference of display and touch-control can be reduced, improve picture quality and touch-control accuracy.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (13)
1. a Transflective in-cell touch panel, comprising: color membrane substrates, thin film transistor (TFT) tft array substrate, and the liquid crystal layer between described color membrane substrates and described tft array substrate; Be formed with multiple pixel cells of the arrangement in matrix in described Transflective in-cell touch panel, each pixel cell is provided with transmission area and echo area; It is characterized in that,
The thickness of the liquid crystal layer of described transmission area is greater than the thickness of the liquid crystal layer of described echo area; And described tft array substrate is provided with optical retarder and metallic reflector in echo area; Described optical retarder is for compensating the light delay caused by the thickness difference of the liquid crystal layer of the liquid crystal layer of described transmission area and described echo area;
Described color membrane substrates has many touch-control sensing electrodes that the line direction along pixel cell extends;
Described tft array substrate has many touch-control drive wires of the gap location between the pixel cell of adjacent column, the data signal line mutually insulated in each described touch-control drive wire and tft array substrate.
2. touch-screen as claimed in claim 1, it is characterized in that, described touch-control drive wire and described data signal line are arranged with layer, and spacing between each described touch-control drive wire is identical.
3. touch-screen as claimed in claim 2, it is characterized in that, the metallic reflector in the pixel cell that described touch-control drive wire is adjacent with at least one is electrical connected by via hole.
4. touch-screen as claimed in claim 3, it is characterized in that, described tft array substrate has the public electrode be positioned at above pixel electrode, and described public electrode has slit-shaped transparent electrode structure in the position corresponding with the open area of described pixel cell;
In each pixel cell, described metallic reflector is positioned at the below of described public electrode and is electrical connected with pixel electrode.
5. touch-screen as claimed in claim 4, it is characterized in that, described public electrode has engraved structure in the position corresponding with described touch-control drive wire.
6. touch-screen as claimed in claim 3, it is characterized in that, described tft array substrate has the public electrode be positioned at below pixel electrode, the pixel cell adjacent with touch-control drive wire arranges the public electrode that has and other pixel cells arrange the public electrode mutually insulated had, and described pixel electrode has slit-shaped transparent electrode structure in the position corresponding with the open area of described pixel cell;
In each pixel cell, described metallic reflector is positioned at the below of described pixel electrode and is electrical connected with public electrode.
7. touch-screen as claimed in claim 1, is characterized in that, touch-control sensing electrode described in each bar between the substrate and black matrix area of described color membrane substrates, or is positioned at the one side of described color membrane substrates described liquid crystal layer dorsad.
8. touch-screen as claimed in claim 7, it is characterized in that, when touch-control sensing electrode described in each bar is between the substrate and black matrix area of described color membrane substrates, each described touch-control sensing electrode has grid electrode structure, and the pattern of each touch-control sensing electrode is covered by described black matrix area.
9. touch-screen as claimed in claim 8, it is characterized in that, the material of described touch-control sensing electrode is transparent conductive oxide or metal.
10. the touch-screen as described in any one of claim 1-9, is characterized in that, adjacent multiple described touch-control sensing electrode is in either end by wire conducting, and adjacent multiple described touch-control drive wire passes through wire conducting in either end.
11. touch-screens as described in any one of claim 1-9, it is characterized in that, the thickness of liquid crystal layer of described transmission area is the twice of the thickness of liquid crystal layer of described echo area; Described optical retarder is quarter-wave optical retarder; In each pixel cell, the area of described metallic reflector accounts for the half of open areas.
12. 1 kinds of display device, is characterized in that, comprise the Transflective in-cell touch panel as described in any one of claim 1-11.
The driving method of 13. 1 kinds of Transflective in-cell touch panel as claimed in claim 1, is characterized in that, comprising:
Time touch-screen being shown each frame is divided into displaying time section and touch-control time period;
In displaying time section, successively scanning gate signal is applied to the every bar signal line in described touch-screen, grayscale signal is applied to data signal line, control liquid crystal molecule upset; Meanwhile, touch-control sensing electrode ground connection, touch-control drive wire no signal inputs;
In the touch-control time period, apply touch scanning signals to touch-control drive wire, the voltage signal of touch scanning signals described in touch-control sensing electrode coupling also exports, meanwhile, and the every bar signal line in described touch-screen and the input of data signal line no signal.
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| CN201210507244.XA CN102999219B (en) | 2012-11-30 | 2012-11-30 | A kind of Transflective in-cell touch panel, its driving method and display device |
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| CN201210507244.XA CN102999219B (en) | 2012-11-30 | 2012-11-30 | A kind of Transflective in-cell touch panel, its driving method and display device |
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| US10474299B2 (en) | 2014-02-24 | 2019-11-12 | Lg Innotek Co., Ltd. | Touch window and display with the same |
| CN103995634B (en) * | 2014-05-12 | 2017-01-18 | 京东方科技集团股份有限公司 | Touch screen and display device |
| CN104484070B (en) | 2014-12-19 | 2017-11-24 | 京东方科技集团股份有限公司 | Drive circuit, driving method, touching device and the display device of touching device |
| CN105511707B (en) * | 2016-01-29 | 2018-06-22 | 上海中航光电子有限公司 | Touch-control display panel |
| CN106293212B (en) | 2016-08-02 | 2023-12-12 | 厦门天马微电子有限公司 | Array substrate, display panel, driving method of display panel and display device |
| CN106354335B (en) * | 2016-10-14 | 2019-08-23 | 京东方科技集团股份有限公司 | Grid voltage supply circuit and driving method, gate driving circuit and display device |
| CN106855762B (en) * | 2017-03-10 | 2019-11-19 | 上海中航光电子有限公司 | A kind of array substrate, touch-control display panel and touch control display apparatus |
| CN107329625B (en) * | 2017-07-12 | 2020-07-14 | 上海天马微电子有限公司 | Touch control display device |
| CN108561762B (en) * | 2018-01-04 | 2021-10-29 | 京东方科技集团股份有限公司 | Lighting panel, method for manufacturing lighting panel, lighting device and method for controlling lighting device |
| CN108762571B (en) * | 2018-05-31 | 2021-10-29 | 上海天马微电子有限公司 | Touch display panel and touch display device |
| CN108920031B (en) * | 2018-07-25 | 2021-05-18 | 京东方科技集团股份有限公司 | Reflective touch substrate and display device |
| CN109991772B (en) * | 2019-03-29 | 2023-03-14 | 广州国显科技有限公司 | Display panel film structure and preparation process thereof |
| CN109884828B (en) * | 2019-04-17 | 2022-01-11 | 京东方科技集团股份有限公司 | Display panel and mobile terminal |
| CN110072329B (en) * | 2019-04-29 | 2020-09-08 | 深圳市华星光电技术有限公司 | Printed circuit board and display device |
| CN112925440A (en) * | 2021-02-09 | 2021-06-08 | 捷开通讯(深圳)有限公司 | Touch control display device |
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