CN101587401A - Touch panel and display device - Google Patents
Touch panel and display device Download PDFInfo
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- CN101587401A CN101587401A CNA200910149904XA CN200910149904A CN101587401A CN 101587401 A CN101587401 A CN 101587401A CN A200910149904X A CNA200910149904X A CN A200910149904XA CN 200910149904 A CN200910149904 A CN 200910149904A CN 101587401 A CN101587401 A CN 101587401A
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Abstract
The invention provides a kind of touch panel; it comprises a parallel upper substrate that is oppositely arranged and an infrabasal plate, a touch-control sensing element and caution sensing element; when external force reaches predetermined strength; can open the caution sensing element; can remind the user to reduce external force, so that the function of protection touch panel to be provided.In addition, the present invention also discloses a kind of display device that comprises this touch panel.
Description
Technical field
The present invention relates to a kind of touch panel, refer to a kind of touch panel especially with external force caution sensing element (warningsensor).
Background technology
In various consumption electronic products market now, personal digital assistant (personal digitalassistant, PDA), mobile phone (mobile Phone) and notebook computer portable electronic products such as (notebook) be extensive use of touch panel (touch panel) all and linked up the interface instrument as the data between user and electronic installation.Since the design of electronic product at present all with light, thin, short, little be direction, therefore in product design, wish to save the space that is provided with as traditional input medias such as button, keyboard, mouses, especially under the drive of the panel computer demand of stressing human oriented design, the display device of collocation touch panel becomes one of key part and component of various electronic product gradually.
The principle of operation of general touch panel is through finger press surface plate surface, makes press points generation change in voltage, can calculate the position of press points by the variable quantity of voltage, and will represent the input signal of this position to pass by conductive material.Yet, if the user has applied excessive external force when pushing touch panel, may cause the destruction of the inner sensing element of touch panel, cause touch controllable function to make a mistake, even may damage touch panel.Therefore, how effectively to avoid the user operation during touch panel because of applying damage or the sensing mistake that excessive external force causes touch panel, the still problem that need endeavour to solve for industry.
Summary of the invention
One of fundamental purpose of the present invention is to provide a kind of touch panel with external force caution sensing element, influences the problems such as operation usefulness of touch panel to improve above-mentioned known user to apply excessive pressure.
According to claim of the present invention, the invention provides a kind of touch panel, it comprises the upper substrate that is oppositely arranged parallel to each other and infrabasal plate, at least one touch-control sensing element and at least one caution sensing element.The touch-control sensing element comprises touch-control sensing top electrode and touch-control sensing bottom electrode, be located at the lower surface of upper substrate and the upper surface of infrabasal plate respectively, and the touch-control sensing bottom electrode is corresponding to the touch-control sensing top electrode.Has first sensing gap between touch-control sensing top electrode and the touch-control sensing bottom electrode.The caution sensing element comprises caution sensing top electrode and caution sensing bottom electrode, divide and be located at the lower surface of upper substrate and the upper surface of infrabasal plate in addition, and caution sensing bottom electrode is corresponding to caution sensing top electrode.Have second sensing gap between caution sensing top electrode and the caution sensing bottom electrode, and second sensing gap is greater than first sensing gap.When the external force that puts on touch panel of the present invention reached a predetermined strength, caution sensing top electrode can contact with caution sensing bottom electrode, made caution sensing element output one read signal, represented that this external force is excessive.
According to the claim of the present patent application, the present invention provides a kind of display device in addition, and it comprises touch control display panel, reads circuit unit and warning circuit unit.Touch control display panel comprises the upper substrate that is oppositely arranged parallel to each other and infrabasal plate, at least one touch-control sensing element and at least one caution sensing element.The touch-control sensing element comprises that the touch-control sensing top electrode is located at the lower surface and the touch-control sensing bottom electrode of upper substrate, is located at the upper surface of infrabasal plate corresponding to the touch-control sensing top electrode.Has first sensing gap between touch-control sensing top electrode and the touch-control sensing bottom electrode.The caution sensing element comprises warns lower surface and the caution sensing bottom electrode that the sensing top electrode is located at upper substrate, is located at the upper surface of infrabasal plate corresponding to caution sensing top electrode.Have second sensing gap between caution sensing top electrode and the caution sensing bottom electrode, and second sensing gap is greater than first sensing gap.When the external force that puts on touch panel reached a predetermined strength, caution sensing top electrode can contact with caution sensing bottom electrode, made caution sensing element output one read signal.In addition, read circuit unit and be used for receiving and read signal, and export a feedback signal, and the warning circuit unit can be controlled touch control display panel and send the excessive alarm signal of this external force of prompting behind receiving feedback signals.
According to claim of the present invention, a kind of embedded (in-cell) is provided again contact panel in addition, and it comprises upper substrate that is oppositely arranged parallel to each other and infrabasal plate, is located at the display material layer between the upper and lower substrate, a plurality of dot structure, at least one touch-control sensing element and at least one caution sensing element.Wherein, infrabasal plate comprises a viewing area, and dot structure is located in the viewing area.Each dot structure comprises that respectively (thin film transistor, TFT), gate line and data line are located at the infrabasal plate surface, and thin film transistor (TFT) is electrically connected at gate line and data line for gate line, data line and thin film transistor (TFT).The touch-control sensing element comprises touch-control sensing top electrode and touch-control sensing bottom electrode, wherein the touch-control sensing top electrode is located at the lower surface of upper substrate, and the touch-control sensing bottom electrode is located at the upper surface of infrabasal plate corresponding to the touch-control sensing top electrode, and has first sensing gap between touch-control sensing top electrode and the touch-control sensing bottom electrode.The caution sensing element comprises caution sensing top electrode and caution sensing bottom electrode, wherein warn the sensing top electrode and be located at the lower surface of upper substrate, and caution sensing bottom electrode is located at the upper surface of infrabasal plate corresponding to caution sensing top electrode, have second sensing gap between caution sensing top electrode and the caution sensing bottom electrode, and second sensing gap is greater than first sensing gap.When the external force that puts on this embedded touch panel reached a predetermined strength, caution sensing top electrode can contact with caution sensing bottom electrode, made caution sensing element output one read signal, represented that this external force is excessive.
Because touch panel of the present invention includes the caution sensing element, this caution sensing element can be unlocked when excessive and export and read signal pushing external force, need reduce to apply external force with further prompting user, and then avoid touch panel to damage because of external force is excessive.
Description of drawings
Fig. 1 is the schematic top plan view of first embodiment of display device of the present invention;
Fig. 2 is the cut-away section structural representation of touch panel shown in Figure 1;
Fig. 3 is the schematic top plan view of second embodiment of display device of the present invention;
Fig. 4 is the schematic equivalent circuit of a pixel region shown in Figure 3;
Fig. 5 is the component placement synoptic diagram of the 3rd embodiment of display device of the present invention;
Fig. 6 is the cut-away section structural representation of touch panel shown in Figure 5;
Fig. 7 shows the synoptic diagram of an embodiment of alarm signal for display device of the present invention;
Fig. 8 is the component placement synoptic diagram of the 4th embodiment of display device of the present invention;
Fig. 9 is the dot structure schematic equivalent circuit of the 5th embodiment of display device of the present invention;
Figure 10 is the dot structure schematic equivalent circuit of the 6th embodiment of display device of the present invention.
Wherein, Reference numeral
10 display device, 12 touch panels
14 upper substrates, 16 infrabasal plates
18 touch areas, 20 peripheral circuit areas
22 display material layer, 24 caution sensing elements
26 touch-control sensing elements 28 are selected circuit unit
30 read circuit unit 32 signal read lines
The 32a first signal read line 32b secondary signal read line
34 signal selection wires, 36 touch-control sensing top electrodes
38 touch-control sensing bottom electrodes, 40 touch-control electrode supporting portions
42 caution sensing top electrodes, 44 caution electrode supporting portions
46 caution sensing bottom electrodes, 48 first photoresistance septs
50 second photoresistance septs, 52 gate line circuit units
54 data line circuit unit, 56 gate lines
58 data lines, 60 viewing areas
62 pixel regions, 64 pixel transistors
66 signals read transistor 68 liquid crystal capacitances
Order line is pushed in 70 warning circuit unit 72,72 '
74 pixel electrodes, 76 panel support elements
76a supporting construction 76b lower support structure
78 supplemental support element 78a go up auxiliary support structure
Auxiliary support structure 80 common electrodes under the 78b
82 sensing signal read lines, 84 touch-controls read circuit unit
Circuit unit is read in 88 cautions of 86 alarm signal read lines
90 patterned transparent conductive layer
The thickness of H1, H2 photoresistance sept or support portion
The P1 first sensing gap P2 second sensing gap
P3 supports gap Sc control signal
The Sf feedback signal
Embodiment
According to spirit of the present invention, the caution sensing element is set in touch panel, when the external force that puts on the touch panel surface is excessive, can open the caution sensing element, thereby produce one and read signal or alarm signal, cooperate other control modules to carry out a caution mechanism again, send alert news, just can avoid the user to continue to apply excessive external force and the damage that causes touch panel to the user.
Please refer to Fig. 1, Fig. 1 is the schematic top plan view of first embodiment of display device 10 of the present invention.Display device 10 of the present invention comprises touch panel 12, and it can be the outer panel that is affixed on panel surface, and in other embodiments, touch panel 12 also can be embedded (in-cell) contact panel, also is touch control display panel.The touch panel 12 of present embodiment comprises upper substrate 14 and infrabasal plate 16, both are parallel to each other relatively, and upper substrate 14 is defined as touch area 18 with the overlapping region of infrabasal plate 16, and the zone definitions that infrabasal plate 16 is not covered by upper substrate 14 is a peripheral circuit area 20.Touch panel 12 comprises at least one touch-control sensing element 26 and at least one caution sensing element 24 in addition, and touch-control sensing element 26 is with caution sensing element 24 structure proximates.In preferred embodiment, touch panel 12 comprises a plurality of touch-control sensing elements 26 and a plurality of caution sensing elements 24, divides to be laid in the touch area 18.Touch panel 12 comprises many barss read line (readout line) 32 and many barss selection wire (selecting line) 34 in addition, interwoven, and each touch-control sensing element 26 is electrically connected at a signal read line 32 and a signal selection wire 34 respectively with each caution sensing element 24.
Moreover display device 10 of the present invention comprises in addition to be selected circuit unit 28 and reads circuit unit 30, and preferable being located on the touch panel 12 for example is located in the peripheral circuit area 20.Yet, in other embodiments, select circuit unit 28 and read circuit unit 30 and can be located at other external circuit boards, be electrically connected at touch-control sensing element 26 and caution sensing element 24 on the touch panel 12 by this circuit board again.Because signal read line 32 is electrically connected at respectively with signal selection wire 34 and reads circuit unit 30 and select circuit unit 28, therefore be subjected to the external force touch-control or exert pressure and during the conducting unlatching when touch-control sensing element 26 or caution sensing element 24, can produce one respectively and read signal, a direct current voltage signal for example transfers to by signal read line 32 and to read circuit unit 30.Different is, the signal that reads that touch-control sensing element 24 is produced is used as the touch-control instruction, is read signal and is used for making and reads circuit unit 30 or other control modules produce alarm signal and caution sensing element 26 produces.In the present embodiment, touch-control sensing element 26 is arranged in the touch panel 12 with caution sensing element 24 is interspersed mutually, and be positioned at the touch-control sensing element 26 and all shared same signal read line 32 of caution sensing element 24 of same craspedodrome, be positioned at the touch-control sensing element 26 and the then shared identical signal selection wire 34 of caution sensing element 24 of same line.Yet, in other embodiments, touch-control sensing element 24 is not limited to that shown in Figure 1 with the arrangement mode of caution sensing element 26, for example touch-control sensing element 26 can be arranged in many craspedodrome or the lines that only comprise single kind of sensing element individually with caution sensing element 24, side by side adjacent each other, therefore, touch-control sensing element 26 and caution may not can shared identical signal read line 32 of sensing element 24 or signal selection wire 34.Moreover the quantity of caution sensing element 24 also can be less than touch-control sensing element 26, and for example every plural touch-control sensing element 26 caution sensing element 24 of just arranging in pairs or groups is located at its contiguous locating.
Please refer to Fig. 2, Fig. 2 is the cut-away section synoptic diagram of touch panel 12 shown in Figure 1.Touch-control sensing element 26 and caution sensing element 24 are located between the upper and lower substrate 14,16, wherein touch-control sensing element 26 comprises touch-control sensing top electrode 36 and touch-control sensing bottom electrode 38, be located at the lower surface of upper substrate 14 and the upper surface of infrabasal plate 16 respectively, and orthogonal correspondence is relative.In addition, the lower surface of upper substrate 14 comprises touch-control electrode supporting portion 40 in addition, is located between touch-control sensing top electrode 36 and the upper substrate 14, and it has the first thickness H1, and has the first sensing gap P1 between touch-control sensing top electrode 36 and the touch-control sensing bottom electrode 38.On the other hand, caution sensing element 24 comprises caution sensing top electrode 42 and caution sensing bottom electrode 46, is located at the lower surface of upper substrate 12 and the upper surface of infrabasal plate 14 respectively, and both are also orthogonal relatively.Be provided with caution electrode supporting portion 44 between caution sensing top electrode 42 and upper substrate 14, it has the second thickness H2.In addition, has the second sensing gap P2 between caution sensing top electrode 42 and the caution sensing bottom electrode 46.In preferred embodiment, touch-control electrode supporting portion 40 and caution electrode supporting portion 44 can be respectively be made of the photoresistance sept (photoresist spacer) of patterning.As shown in Figure 2, the first thickness H1 is obviously greater than the second thickness H2, so touch-control sensing top electrode 36 warns sensing top electrode 42 more near infrabasal plate 16, that is the first sensing gap P1 is less than the second sensing gap P2.In preferred embodiment, the second sensing gap P2 is between about 1.1 to about 10 times of the first sensing gap P1, and is preferably between about 1.2 to about 5 times.Under this design, when external force is applied to touch panel 12 surface, can makes touch-control sensing top electrode 36 be easier to be pressed down and touch touch-control sensing bottom electrode 38, thereby produce touch sense signals.On the other hand, when the external force that is applied to touch panel 12 reaches a predetermined strength and makes upper substrate 14 be pressed down to be out of shape more severely, the caution sensing element 24 that the second sensing gap P2 is bigger still can be unlocked, that is caution sensing top electrode 44 still can contact caution sensing bottom electrode 46 and produce and read signal because of pressing down, and is sent to by signal read line 32 and reads circuit unit 30.Therefore, the second sensing gap P2 that warns sensing element 24 by design just can reach the function that excessive external force is provided sensing and caution than the first sensing gap P1 greater than touch-control sensing element 26.
Please refer to Fig. 3, Fig. 3 is simplified illustration for the schematic top plan view of second embodiment of display device of the present invention, and the element that repeats with last embodiment is with the components identical symbolic representation.Display device 10 of the present invention comprises a touch panel 12, and it is preferably the embedded touch panel, also is the touch control display panel of having integrated the touch function.Touch panel 12 comprises upper substrate 14 and infrabasal plate 16, and both are parallel to each other relatively, and the overlapping region of upper substrate 14 and infrabasal plate 16 is defined as viewing area 60, and the zone definitions that infrabasal plate 16 edges are not covered by upper substrate 14 is a peripheral circuit area 20.Because touch panel 12 is the embedded touch panel, so it can be two-d display panels such as display panels, organic electroluminescence display panel, Plasmia indicating panel and electrophoretic display panel, but is not limited thereto.Therefore, upper substrate 14 and infrabasal plate 16 can be used as colored filter glass substrate and the array glass substrate in the general display panels respectively, and the display material layer of being located between upper substrate 14 and the infrabasal plate 16 (figure does not show) is liquid crystal layer.Display device 10 comprises in addition and reads circuit unit 30, gate line circuit unit 52 and data line circuit unit 54, the preferable peripheral circuit area 20 of being located at.In addition, infrabasal plate 16 surfaces are provided with many barss read line 32, gate line 56 and data line 58, are electrically connected at respectively to read circuit unit 30, gate line circuit unit 52 and data line circuit unit 54.Wherein, gate line 56 is perpendicular to signal read line 32 and data line 58, and defines a plurality of pixel regions 62 that are arranged with data line 58.In the present embodiment, each is warned sensing element 24 and is electrically connected at gate line 56 and signal read line 32 respectively, so gate line 56 has replaced the signal selection wire 34 among first embodiment.
Please refer to Fig. 4, Fig. 4 is the schematic equivalent circuit of the dot structure of a pixel region 62 shown in Figure 3.Touch panel 12 surfaces include a plurality of dot structures, are located at each pixel region 62, and each dot structure comprises a gate line 56, a data line 58, at least one liquid crystal capacitance 68 and a pixel transistor 64, and it is preferably thin film transistor (TFT).Wherein the grid of pixel transistor 64, source electrode and drain electrode are electrically connected at the top electrode of gate line 56, data line 58 and liquid crystal capacitance 68 respectively, and the bottom electrode of liquid crystal capacitance 68 then is electrically connected at the common electrode CE of touch panel 12.In addition, caution sensing element 24 and touch-control sensing element 26 also alternative be located in the pixel region 62.Therefore, when caution sensing element 24 is located at a pixel region 62, this pixel region 62 comprises that in addition signal reads transistor 66, its source electrode is electrically connected at the caution sensing bottom electrode of caution sensing element 24, grid is electrically connected at gate line 56 and signal read line 32 respectively with drain electrode, and the caution sensing top electrode of caution sensing element 24 then is electrically connected at common electrode CE.
It should be noted that, though demonstrating each pixel region 62, Fig. 3 can be provided with a caution sensing element 24 or a touch-control sensing element 26, yet touch-control sensing element 26 is not limited to that shown in Figure 3 with the distribution situation of caution sensing element 24, for example can a caution sensing element 24 just be set every the pixel region more than three 62.In addition, data line circuit unit 54, gate line circuit unit 52 also is not limited to configuration among Fig. 3 be provided with position and to each other the relative position that read circuit unit 30, for example data line circuit unit 54 with read the same side that circuit unit 30 can be located at viewing area 60, perhaps by integrating setting with driving circuit chip.
Please refer to Fig. 5, Fig. 5 is the component placement synoptic diagram of the 3rd embodiment of display device of the present invention, the gate line 56 of present embodiment also replaces the signal selection wire and is electrically connected at caution sensing element 24 and touch-control sensing element 26, and caution sensing element 24 is arranged in different craspedodromes with touch-control sensing element 26, therefore can the shared signal read line.As shown in the figure, be provided with gate line 56 and data line 58 in each pixel region 62, be electrically connected at pixel transistor 64, and be provided with pixel electrode 74 in addition in the pixel region 62, be electrically connected at pixel transistor 64.Part touch-control sensing element 26 is arranged in same craspedodrome, and be electrically connected at the first signal read line 32a, but be not that each pixel region 62 in this craspedodrome all is provided with touch-control sensing element 26, for example among Fig. 5 in the craspedodrome of the rightmost side, three to five pixel regions 62 in meeting interval between the part touch-control sensing element 26, and may be provided with panel support element 76 and supplemental support element 78 in the different pixels district 62 in addition, intert and be located between the touch-control sensing element 26.24 of sensing elements of caution are located in the same craspedodrome with a plurality of supplemental support elements 78, and respectively warn sensing element 24 and be electrically connected at secondary signal read line 32b.Because the main effect of caution sensing element 24 is sensing external force and whether surpasses a predetermined value, therefore the caution sensing element 24 in the present embodiment is far fewer than the quantity of touch-control sensing element 26, and caution sensing element 24 can cooperate panel support component 76 to do configuration, for example be separated by three pixel regions 62 and be provided with, as shown by arrows with panel support element 76.
Please refer to Fig. 6, Fig. 6 is the cross-sectional view of touch panel 12 shown in Figure 5, it mainly demonstrates the cross-section structure of caution sensing element 24, touch-control sensing element 26, panel support element 76 and supplemental support element 78, has therefore omitted pixel electrode 74 and pixel transistor 64.Is example with touch panel 12 for embedded touch control LCD (Liquid Crystal Display) panel, is provided with display material layer 22 between upper substrate 14 and the infrabasal plate 16, for example is liquid crystal layer.Moreover, touch panel 12 comprises the first photoresistance sept 48 and the second photoresistance sept 50, be located between upper substrate 14 and the touch-control sensing top electrode 36 respectively and upper substrate 14 and caution sensing top electrode 42 between, be used as the described touch-control electrode supporting of first embodiment portion and caution electrode supporting portion respectively.The thickness H1 of the first photoresistance sept 48 is greater than the thickness H2 of the second photoresistance sept 50, therefore the first sensing gap P1 between touch-control sensing top electrode 36 and the touch-control sensing bottom electrode 38 is smaller than the second sensing gap P2 between caution sensing top electrode 42 and the caution sensing bottom electrode 46, and wherein the second sensing gap P2 is preferably about 1.1 to the first about 10 times sensing gap P1.It should be noted that, the lower surface of upper substrate 14 is provided with common electrode 80, it is preferably a transparent conductive layer, comprises the surface that is covered in first and second photoresistance sept 48,50, so touch-control sensing top electrode 36 comprises common electrode 80 partly with caution sensing top electrode 42.Moreover, the upper surface of infrabasal plate 16 comprises and is provided with a patterned transparent conductive layer 90, and touch-control sensing bottom electrode 38 comprises patterned transparent conductive layer 90 partly respectively with caution sensing bottom electrode 46, wherein patterned transparent conductive layer 90 can be made with same technology with pixel electrode 74, and is also can identical materials made.On the other hand, panel support element 76 is located between upper substrate 14 and the infrabasal plate 16.In the present embodiment, panel support element 76 comprises upper support structure 76a and lower support structure 76b, is located at the surface of upper substrate 14 and infrabasal plate 16 respectively, contacts each other and defines panel gap (cell gap) CG of touch panel 12.Yet in other embodiments, panel support element 76 can only comprise a supporting construction, for example is a photoresistance sept, is arranged at the lower surface of upper substrate 14 and extends downwards and contact with infrabasal plate 16 lip-deep elements.Supplemental support element 78 comprises auxiliary support structure 78a and following auxiliary support structure 78b, be located at the surface of upper substrate 14 and infrabasal plate 16 respectively, have one between the two and support gap P3, wherein go up the photoresistance sept that auxiliary support structure 78a can comprise a partial common electrode 80 and a patterning, and support gap P3 less than the second sensing gap P2, but be a bit larger tham the first sensing gap P1.Therefore, when the user made upper substrate 14 distortion downwards with pressed by external force touch panel 12, touch-control sensing top electrode 36 can move down earlier and contact with touch-control sensing bottom electrode 38, opened touch-control sensing element 26 to produce touching signals; When external force was big, the last auxiliary support structure 78a of supplemental support element 78 then can further contact because of moving down with following auxiliary support structure 78b, to provide touch panel 12 1 anchorage forces, avoided it influencing normal operation by depressing than external force greatly; And when external force bigger and when reaching predetermined strength, caution sensing top electrode 42 is also contacted with caution sensing bottom electrode 46, open caution sensing element 24, and then the external force of reminding the user to reduce to push by display device 10, otherwise cause the damage of touch panel 12 easily.
About reminding the user to reduce the method for external force, refer again to Fig. 3 with display device 10.Display device 10 of the present invention comprises warning circuit unit 70 in addition, and it can be located on the touch panel 12 or be used as an external circuit, is electrically connected to read circuit unit 30 or data line circuit unit 54 and gate line circuit unit 52.When caution sensing element 24 is unlocked and exports and read signal when reading circuit unit 30, read circuit unit 30 meeting output feedback signal Sf to warning circuit unit 70, and warning circuit unit 70 can be controlled touch panel 12 and send the excessive alarm signal of prompting user's external force behind receiving feedback signals Sf.For example warning circuit unit 70 can send control signal Sc to gate line circuit unit 52 or data line circuit unit 54, demonstrates above-mentioned alarm signal with control touch panel 12 in viewing area 60.
Please refer to Fig. 7, Fig. 7 demonstrates display device 10 of the present invention is sent an embodiment of alarm signal when external force is excessive synoptic diagram.Shown in left figure, under normal operation, when the user pushes touch panel 12, can demonstrate in the viewing area 60 color more shallow or be represented by dotted lines push order line 72, allow the user know that touch panel 12 has read its touch point and instruction.Right figure then demonstrates when user's externally applied forces is excessive, can open caution sensing element 24, so that warning circuit unit 70 can send alarm signal by control touch panel 12 as previously mentioned, for example make touch panel 12 demonstrate thick, color is dark or solid versions push order line 72 ', with the power of reminding the user to reduce to push.Yet the present invention points out the excessive alarm signal of user's external force to be not limited to that shown in Figure 7, and for example this alarm signal can show by literal, perhaps shows with an auditory tone cues signal.
Please refer to Fig. 8, Fig. 8 is the component placement synoptic diagram of the 4th embodiment of display device of the present invention.According to spirit of the present invention, quantity and the spacing of caution sensing element need size, Pixel Dimensions, the contact area of touching media, the structure and the practical application of caution sensing element according to this touch panel to carry out optimized design and adjustment in the panel, and be machine-processed and take into account each aperture ratio of pixels so that effective caution to be provided.Touch panel of the present invention 12 shown in Figure 8 is an embedded touch panel, it is located in the display device 10, comprise a plurality of touch-control sensing elements 26 and caution sensing element 24, both are arranged in a plurality of lines and craspedodrome separately, therefore touch-control sensing element 26 and caution sensing element 24 can shared signal selection wire 32 and signal read lines, the touch-control sensing element 26 of for example being located at same craspedodrome is electrically connected on the sensing signal read line 82 that extends in vertical direction, and being electrically connected at touch-control, sensing signal read line 82 reads circuit unit 84, and the caution sensing element 24 in the same craspedodrome is electrically connected on the alarm signal read line 86 that is parallel to sensing signal read line 82 substantially, 86 of alarm signal read lines are electrically connected at caution and read circuit unit 88, and therefore caution is read circuit unit 88 and touch-control and read circuit unit 84 and can handle respectively by what caution sensing element 24 and touch-control sensing element 26 were transmitted and read signal.Yet in other embodiments, sensing signal read line 82 can all be electrically connected at the same circuit unit that reads with alarm signal read line 86.
Generally speaking; if a side of each touch-control sensing element 26 all is provided with caution sensing element 24; then can provide touch panel 12 best susceptibility and defencive function; yet; in order to take into account aperture opening ratio, the adjacent side that in the present embodiment is not each touch-control sensing element 26 all is provided with caution sensing element 24.For example, if consider that the nib size with the general standard pointer is to control the scope of pushing of touch panel 12, and the distance of 26 of adjacent touch sense elements is d, and the preferable distance of then warning between the touch-control sensing element 26 that sensing element 24 is adjacent is (d √ 2)/2.
Please refer to Fig. 9, Fig. 9 is the schematic equivalent circuit of touch panel one dot structure of fifth embodiment of the invention.The touch panel of present embodiment is the embedded touch panel, comprise a plurality of pixel regions 62, defined by gate line 56 and data line 58 and to be formed, wherein touch-control sensing element (figure does not show) is distributed in different pixel region 62 with caution sensing element 24, and general display panel electronic component common gate polar curve 56 and data line 58 with this pixel region 62, and control by same pixel transistor 64, the caution sensing bottom electrode 46 of for example warning sensing element 24 and the bottom electrode of liquid crystal capacitance 68 all are electrically connected at the drain electrode of pixel transistor 64, and the top electrode of caution sensing top electrode 42 and liquid crystal capacitance 68 all is electrically connected at common electrode CE.Be provided with in the pixel region 62 of touch-control sensing element at other, the circuit connecting mode of touch-control sensing element is similar to caution sensing element 24 shown in Figure 9.That is, each pixel region 62 comprises that a pixel transistor 64, a liquid crystal capacitance 68 and alternative comprise a caution sensing element 24 or a touch-control sensing element, the touch panel that tradition only can be had the touch-control sensing element is improved, touch-control sensing element in the partial pixel district 62 is replaced to caution sensing element 24, and different is the sensing gap of the sensing gap of caution sensing element 24 greater than the touch-control sensing element.
Please refer to Figure 10, Figure 10 is the schematic equivalent circuit of touch panel one dot structure of sixth embodiment of the invention.In the present embodiment, each pixel region 62 also only comprises a caution sensing element 24 or a touch-control sensing element (figure does not show), and caution sensing element 24 or touch-control sensing element are electrically connected at corresponding signal read line 32 and signal selection wire 34, not with pixel transistor 64 shared data lines 58 and gate line 56.Therefore, be provided with the pixel region 62 of warning sensing element 24 and can comprise gate line parallel to each other 56 and signal selection wire 34 and data line 58 and signal read line 32 parallel to each other simultaneously.
Compared to known technology, display device of the present invention or touch panel comprise the caution sensing element, when the external force that puts on the touch panel surface reaches a predetermined strength, can make caution sensing top electrode and warn the sensing bottom electrode and contact and open the caution sensing element, signal is read in output, and then make display device can export the excessive alarm signal of prompting user's external force, cause damage to avoid touch panel because of excessive external force.According to spirit of the present invention, the sensing gap of utilizing the sensing electrode that is located between the substrate to have different section differences designs the caution sensing element so that caution sensing mechanism to be provided.When touch panel comprises a plurality of caution sensing element, do not limit and respectively warn sensing element and all have identical sensing gap, for example can design when the caution sensing element with different sensing gap is unlocked, can produce different alarm signals with the prompting user.In addition, caution sensing element, touch-control sensing element, pixel transistor, liquid crystal capacitance, signal read line, signal selection wire, gate line, data line and the circuit design that is used between the circuit unit of received signal are not limited to aforesaid embodiment, the different sensing gap of all utilizations design the touch panel or the display device of caution sensing element, should all belong to category of the present invention.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (22)
1. touch panel is characterized in that it comprises:
One upper substrate and an infrabasal plate, both are parallel to be oppositely arranged;
At least one touch-control sensing element, it comprises:
One touch-control sensing top electrode is located at the lower surface of this upper substrate; And
One touch-control sensing bottom electrode is located at the upper surface of this infrabasal plate, and is had one first sensing gap between this touch-control sensing top electrode and this touch-control sensing bottom electrode corresponding to this touch-control sensing top electrode; And
At least one caution sensing element, it comprises:
One warns the sensing top electrode, is located at the lower surface of this upper substrate; And
One warns the sensing bottom electrode, is located at the upper surface of this infrabasal plate corresponding to this caution sensing top electrode, have one second sensing gap between this caution sensing top electrode and this caution sensing bottom electrode, and this second sensing gap is greater than this first sensing gap;
Wherein, when an external force that puts on this touch panel reached a predetermined strength, this caution sensing top electrode can be warned the sensing bottom electrode with this and contact, and made this caution sensing element output one read signal, represented that this external force is excessive.
2. touch panel according to claim 1 is characterized in that, this second sensing gap is about 1.1 to this about 10 times first sensing gap.
3. touch panel according to claim 1, it is characterized in that, it comprises at least one first sept and at least one second sept in addition, be located between this upper substrate and this touch-control sensing top electrode respectively and this upper substrate and this caution sensing top electrode between, and the thickness of this first sept is greater than the thickness of this second sept.
4. touch panel according to claim 1 is characterized in that it comprises the lower surface of being located at this upper substrate altogether with electrode in addition, and this touch-control sensing top electrode and this caution sensing top electrode comprise this common electrode of part respectively.
5. touch panel according to claim 1 is characterized in that it comprises a patterned transparent conductive layer in addition, is located at the upper surface of this infrabasal plate, and this touch-control sensing bottom electrode and this caution sensing bottom electrode comprise this patterned transparent conductive layer of part respectively.
6. touch panel according to claim 1 is characterized in that, it comprises at least one signal selection wire in addition, and this touch-control sensing element and this caution sensing element all are electrically connected at this signal selection wire.
7. touch panel according to claim 1 is characterized in that it comprises at least one signal read line in addition, and this touch-control sensing element and this caution sensing element all are electrically connected at this signal read line.
8. touch panel according to claim 1 is characterized in that, it comprises a plurality of panel support elements in addition, be located between this upper substrate and this infrabasal plate, and described panel support element defines a panel gap of this touch panel.
9. touch panel according to claim 1, it is characterized in that, it comprises at least one supplemental support element in addition, it comprises on one auxiliary support structure and auxiliary support structure once, be located at the lower surface of this upper substrate and the upper surface of this infrabasal plate respectively, should go up between auxiliary support structure and this time auxiliary support structure and has a support gap, and this first sensing gap supports the gap less than this, and this second sensing gap supports the gap greater than this.
10. display device is characterized in that it comprises:
One touch control display panel, it comprises:
One upper substrate and an infrabasal plate, both are parallel to be oppositely arranged;
At least one touch-control sensing element, it comprises:
One touch-control sensing top electrode is located at the lower surface of this upper substrate; And
One touch-control sensing bottom electrode is located at the upper surface of this infrabasal plate, and is had one first sensing gap between this touch-control sensing top electrode and this touch-control sensing bottom electrode corresponding to this touch-control sensing top electrode; And
At least one caution sensing element, it comprises:
One warns the sensing top electrode, is located at the lower surface of this upper substrate; And
One caution sensing bottom electrode, be located at the upper surface of this infrabasal plate corresponding to this caution sensing top electrode, has one second sensing gap between this caution sensing top electrode and this caution sensing bottom electrode, and this second sensing gap is greater than this first sensing gap, wherein when an external force that puts on this touch control display panel reaches a predetermined strength, this caution sensing top electrode can be warned the sensing bottom electrode with this and contact, and makes this caution sensing element output one read signal;
One reads circuit unit, is used to receive this and reads signal, and export a feedback signal; And
One warning circuit unit, after receiving this feedback signal, this warning circuit unit can be controlled this touch control display panel and send the excessive alarm signal of this external force of prompting.
11. display device according to claim 10 is characterized in that, this touch control display panel comprises a viewing area in addition, and this warning circuit unit comprises that this touch control display panel of control demonstrates this alarm signal.
12. display device according to claim 10 is characterized in that, this alarm signal comprises an auditory tone cues signal.
13. display device according to claim 10 is characterized in that, this second sensing gap is about 1.1 to this about 10 times first sensing gap.
14. display device according to claim 10, it is characterized in that, it comprises at least one first sept and at least one second sept in addition, be located between this upper substrate and this touch-control sensing top electrode respectively and this upper substrate and this caution sensing top electrode between, and the thickness of this first sept is greater than the thickness of this second sept.
15. display device according to claim 10 is characterized in that, it comprises the lower surface of being located at this upper substrate altogether with electrode in addition, and this touch-control sensing top electrode and this caution sensing top electrode comprise this common electrode of part respectively.
16. display device according to claim 10 is characterized in that, it comprises a patterned transparent conductive layer in addition, is located at the upper surface of this infrabasal plate, and this touch-control sensing bottom electrode and this caution sensing bottom electrode comprise this patterned transparent conductive layer of part respectively.
17. display device according to claim 10 is characterized in that, it comprises at least one signal selection wire in addition, and this touch-control sensing element and this caution sensing element all are electrically connected at this signal selection wire.
18. display device according to claim 10 is characterized in that, it comprises at least one signal read line in addition, and this touch-control sensing element and this caution sensing element all are electrically connected at this signal read line.
19. display device according to claim 10 is characterized in that, it comprises a plurality of panel support elements in addition, be located between this upper substrate and this infrabasal plate, and described panel support element defines a panel gap of this touch control display panel.
20. display device according to claim 10, it is characterized in that, it comprises at least one supplemental support element in addition, it comprises on one auxiliary support structure and auxiliary support structure once, be located at the lower surface of this upper substrate and the upper surface of this infrabasal plate respectively, should go up between auxiliary support structure and this time auxiliary support structure and has a support gap, and this first sensing gap supports the gap less than this, and this second sensing gap supports the gap greater than this.
21. an embedded touch panel is characterized in that it comprises:
One upper substrate and an infrabasal plate, both are parallel to be oppositely arranged, and this infrabasal plate comprises a viewing area;
One display material layer is located between this upper substrate and this infrabasal plate;
A plurality of dot structures are located in this viewing area, and respectively this dot structure comprises respectively:
One gate line and a data line are located at this infrabasal plate surface; And
One thin film transistor (TFT) is electrically connected at this gate line and this data line;
At least one touch-control sensing element, it comprises:
One touch-control sensing top electrode is located at the lower surface of this upper substrate; And
One touch-control sensing bottom electrode is located at the upper surface of this infrabasal plate, and is had one first sensing gap between this touch-control sensing top electrode and this touch-control sensing bottom electrode corresponding to this touch-control sensing top electrode; And
At least one caution sensing element, it comprises:
One warns the sensing top electrode, is located at the lower surface of this upper substrate; And
One warns the sensing bottom electrode, is located at the upper surface of this infrabasal plate corresponding to this caution sensing top electrode, have one second sensing gap between this caution sensing top electrode and this caution sensing bottom electrode, and this second sensing gap is greater than this first sensing gap;
Wherein, when an external force that puts on this embedded touch panel reached a predetermined strength, this caution sensing top electrode can be warned the sensing bottom electrode with this and contact, and made this caution sensing element output one read signal, represented that this external force is excessive.
22. embedded touch panel according to claim 21 is characterized in that, when this caution sensing element is exported this and read signal, can make this viewing area of this embedded touch panel demonstrate an alarm signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910149904XA CN101587401B (en) | 2009-06-22 | 2009-06-22 | Touch-control panel and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910149904XA CN101587401B (en) | 2009-06-22 | 2009-06-22 | Touch-control panel and display device |
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| CN101587401A true CN101587401A (en) | 2009-11-25 |
| CN101587401B CN101587401B (en) | 2011-01-19 |
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| CN200910149904XA Expired - Fee Related CN101587401B (en) | 2009-06-22 | 2009-06-22 | Touch-control panel and display device |
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| CN102222475A (en) * | 2010-04-14 | 2011-10-19 | 联咏科技股份有限公司 | Display apparatus with touch function and two-dimension sensing method of touch panel |
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| CN106557196B (en) * | 2015-09-30 | 2019-10-18 | 乐金显示有限公司 | Electronic device with pressure touch function |
| CN106154651A (en) * | 2016-09-14 | 2016-11-23 | 厦门天马微电子有限公司 | A kind of touch-control display panel |
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| CN101587401B (en) | 2011-01-19 |
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