TWI500999B - Touch panel - Google Patents
Touch panel Download PDFInfo
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- TWI500999B TWI500999B TW098140545A TW98140545A TWI500999B TW I500999 B TWI500999 B TW I500999B TW 098140545 A TW098140545 A TW 098140545A TW 98140545 A TW98140545 A TW 98140545A TW I500999 B TWI500999 B TW I500999B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Position Input By Displaying (AREA)
Description
本發明係關於一種觸控面板，及更特別是關於一種能夠藉由辨別人類身體接觸或未接觸在基板不彎曲的情況下產生觸控信號，及能夠感知多點觸控，及可提供做為裝設於顯示裝置的單一基板之觸控面板。The present invention relates to a touch panel, and more particularly to a touch signal that can be generated by recognizing a body contact or non-contact when the substrate is not bent, and capable of sensing multi-touch, and can be provided as A touch panel mounted on a single substrate of a display device.
一般，觸控面板為一種接附於顯示面板，例如LCD、PDP、OLED、AMOLED上的輸入裝置，且藉由手指或筆產生對應於觸控點的位置偵測信號。觸控面板廣泛用於個人裝置、工業裝置、及DID(數位資訊裝置)等。Generally, the touch panel is an input device attached to a display panel, such as an LCD, a PDP, an OLED, or an AMOLED, and generates a position detection signal corresponding to the touch point by a finger or a pen. Touch panels are widely used in personal devices, industrial devices, and DIDs (Digital Information Devices).
習知觸控面板係分類為電阻型、光學型等等，但電阻型觸控面板因為製程簡單及成本低而被廣泛使用。第1圖顯示電阻型觸控面板。在第1圖，觸控面板包含在顯示裝置1上彼此面對的第一基板3及第二基板5。將例如ITO(氧化銦錫)的透明導電層7及9分別應用於第一基板3的上表面及第二基板5的下表面，複數個電阻點11係提供於第一基板3的上表面，及雖然未示出，複數個電阻點亦對應地提供於第二基板5的下表面。Conventional touch panels are classified into a resistive type, an optical type, and the like, but the resistive touch panel is widely used because of its simple process and low cost. Figure 1 shows a resistive touch panel. In FIG. 1, the touch panel includes a first substrate 3 and a second substrate 5 that face each other on the display device 1. Transparent conductive layers 7 and 9 such as ITO (indium tin oxide) are applied to the upper surface of the first substrate 3 and the lower surface of the second substrate 5, respectively, and a plurality of resistance points 11 are provided on the upper surface of the first substrate 3. And although not shown, a plurality of resistance points are correspondingly provided on the lower surface of the second substrate 5.
若筆17接觸第二基板5，則第二基板5彎曲，及第二基板5的導電層9接觸第一基板3的導電層7，接著施用於導電層7、9的電壓值根據相對應電阻點11的電阻值降低，及所偵測電壓值於AD轉換器13轉換為數位值，數位值被送至CPU 15且得到觸控點的座標值。此電阻型觸控面板因為其製程簡單及成本低而為廣泛使用。If the pen 17 contacts the second substrate 5, the second substrate 5 is bent, and the conductive layer 9 of the second substrate 5 contacts the conductive layer 7 of the first substrate 3, and then the voltage values applied to the conductive layers 7, 9 are according to the corresponding resistance. The resistance value of the point 11 is lowered, and the detected voltage value is converted to a digital value by the AD converter 13, and the digital value is sent to the CPU 15 and the coordinate value of the touch point is obtained. This resistive touch panel is widely used because of its simple process and low cost.
然而，電阻型觸控面板具有一些缺點，其藉由使用第二基板5的彎曲偵測接觸，故第二基板5的變形是無法避 免的。若第二基板5由膜製造，基板的彎曲會造成其表面上的刮傷。若第二基板5由玻璃製造，應磨製或蝕刻玻璃至0.2至0.3毫米以具有足夠彈性，其會造成結構弱化，且其可能會在變長前裂開。及因為彎曲基板的接觸按壓相當弱，若彎曲量小，則無法辨識接觸，及有時會失去接觸信號。However, the resistive touch panel has some disadvantages in that the deformation of the second substrate 5 is inevitable by detecting the contact using the curvature of the second substrate 5. Free. If the second substrate 5 is made of a film, the bending of the substrate causes scratches on the surface thereof. If the second substrate 5 is made of glass, the glass should be ground or etched to 0.2 to 0.3 mm to have sufficient elasticity, which causes structural weakening, and which may crack before becoming longer. And because the contact pressing of the curved substrate is rather weak, if the amount of bending is small, the contact cannot be recognized, and the contact signal may be lost.
因為其使用兩個基板3、5且例如ITO的導電層7、9係施用於第一基板3及第二基板5的所有區域，故電阻型觸控面板具有相對低的透光率。低透射率必然造成低品質的顯示裝置1。及因為其使用兩個基板，無可避免地必須裝設間隔物以使兩個基板分開，其造成複雜的製程、高成本及低產率。Since the two substrates 3, 5 are used and the conductive layers 7, 9 of, for example, ITO are applied to all regions of the first substrate 3 and the second substrate 5, the resistive touch panel has a relatively low light transmittance. Low transmittance necessarily results in a low quality display device 1. And because it uses two substrates, it is inevitable that spacers must be provided to separate the two substrates, which results in complicated processes, high cost, and low yield.
電阻型觸控面板無法辨識多個觸控，此表示同時發生的複數個接觸。例如，若許多人同時寫電子黑板，會發生多個觸控，則習知電阻型觸控面板無法辨識多個觸控，或是其會錯誤地操作。A resistive touch panel cannot recognize multiple touches, which means multiple contacts that occur simultaneously. For example, if many people write an electronic blackboard at the same time and multiple touches occur, the conventional resistive touch panel cannot recognize multiple touches, or it may operate incorrectly.
及當觸控由類比信號偵測時，轉換類比信號為數位信號將招致時間延遲。再者，不可忽視可靠AD轉換器的成本。此外，電阻型觸控面板的關鍵問題為其需要校正以固定電阻點的參考點，若此校正不精準，偵測位置的錯誤會增加。且該面板無法用於大尺寸顯示面板。And when the touch is detected by the analog signal, converting the analog signal to a digital signal will cause a time delay. Furthermore, the cost of a reliable AD converter cannot be ignored. In addition, the key problem of the resistive touch panel is that it needs to be corrected to fix the reference point of the resistance point. If the correction is not accurate, the error of detecting the position will increase. And this panel cannot be used for large display panels.
本發明係解決上文所提及問題，及本發明目的係提供一種觸控面板，其中觸控室係由三向切換裝置(具三個端子的切換裝置)及導電墊所構成，且多點觸控可藉由使用單一 基板而由偵測身體的軟接觸或是接近而辨識，所以因為基板彎曲而造成產品使用年限減少的問題可被避免，且可增加透光率，因而可改善顯示裝置的品質。且觸控面板於顯示裝置的裝設為簡單的。The present invention solves the above mentioned problems, and an object of the present invention is to provide a touch panel, wherein the touch chamber is composed of a three-way switching device (switching device with three terminals) and a conductive pad, and is multi-touch Control can be achieved by using a single The substrate is recognized by detecting soft contact or proximity of the body, so that the problem of reduced product life due to the bending of the substrate can be avoided, and the light transmittance can be increased, thereby improving the quality of the display device. Moreover, the mounting of the touch panel on the display device is simple.
本發明目的係提供一種觸控面板，其可利用已建立及證實的顯示裝置製造方法以達到大量製造及品質可靠性及低成本。SUMMARY OF THE INVENTION An object of the present invention is to provide a touch panel that can utilize established and proven display device manufacturing methods to achieve mass production and quality reliability and low cost.
本發明目的係在顯示裝置及觸控面板之間提供一種擴散片來防止莫瑞效應。The purpose of the present invention is to provide a diffusion sheet between the display device and the touch panel to prevent the Murray effect.
本發明目的係藉由提供一種儲存觸控信號的記憶體，以防止失去觸控信號，其可在失去觸控信號時叫出及處理儲存於記憶體中的觸控信號。The object of the present invention is to provide a memory for storing a touch signal to prevent loss of a touch signal, which can call out and process a touch signal stored in the memory when the touch signal is lost.
本發明目的係提供一種觸控面板，其中切換裝置的閘極端為浮動的，且觸控信號可藉由使用本體的靜電得到。The object of the present invention is to provide a touch panel in which the gate terminal of the switching device is floating, and the touch signal can be obtained by using static electricity of the body.
本發明目的係提供一種觸控面板，其中接觸墊藉由形成為彼此嚙合的齒狀導電墊及利用本體導電性而彼此可靠地電接觸。SUMMARY OF THE INVENTION An object of the present invention is to provide a touch panel in which contact pads are reliably electrically contacted to each other by a toothed conductive pad formed to be engaged with each other and by electrical conductivity of the body.
本發明目的係藉由使用本體的靜電電容提供一種新穎的非接觸型多點觸控可辨識觸控面板。The object of the present invention is to provide a novel non-contact multi-touch identifiable touch panel by using the electrostatic capacitance of the body.
根據本發明一方面，提供一種觸控面板，其可偵測包含人類身體的接觸方式之接觸或接近以產生一相對應位置偵測信號的，該觸控面板包含；由透光物質製造的基板30；形成於該基板30的一表面上的複數第一信號線路32及第二信號線路34，且該位置偵測信號係經由該複數第一 信號線路32及第二信號線路34輸入或輸出；複數觸控室60，其形成於該基板30的經分割主動區域上，且該複數觸控室60包含三向切換裝置40及連接至該切換裝置40的閘極端的一導電墊50，在該基板30的每一經分割區域中，該三向切換裝置40放置於該第一信號線路32及該第二信號線路34之間；一種觸控位置偵測器70，當以該接觸方式接觸或接近該導電墊50時，該觸控位置偵測器70依據該切換裝置40的狀態變化施用一位置偵測信號至該第一信號線路32，並自該第二信號線路34接收一位置偵測信號，以得到所接觸觸控室50的一座標值。According to an aspect of the present invention, a touch panel is provided that can detect a contact or proximity of a contact mode including a human body to generate a corresponding position detection signal, the touch panel including: a substrate made of a light transmissive substance a plurality of first signal lines 32 and second signal lines 34 formed on a surface of the substrate 30, and the position detection signal is first through the plurality The signal line 32 and the second signal line 34 are input or output; the plurality of touch chambers 60 are formed on the divided active area of the substrate 30, and the plurality of touch chambers 60 include a three-way switching device 40 and are connected to the switching device 40. a conductive pad 50 of the gate terminal, in each divided region of the substrate 30, the three-way switching device 40 is placed between the first signal line 32 and the second signal line 34; a touch position detection When the contact pad 70 is in contact with or close to the conductive pad 50, the touch position detector 70 applies a position detection signal to the first signal line 32 according to the state change of the switching device 40, and The second signal line 34 receives a position detection signal to obtain a target value of the touch chamber 50 that is touched.
根據本發明另一方面，進一步提供一種擴散片90於基板30下方。According to another aspect of the present invention, a diffusion sheet 90 is further provided under the substrate 30.
根據本發明另一方面，觸控位置偵測器70進一步包含記憶體74，其儲存對應於觸控室60的該座標值的位址，故若該位置偵測信號是從該第二信號線路34接收，該相對應觸控室60的該座標值則儲存於該記憶體74的相對應位址。According to another aspect of the present invention, the touch position detector 70 further includes a memory 74 that stores an address corresponding to the coordinate value of the touch room 60, so if the position detection signal is from the second signal line 34 Receiving, the coordinate value of the corresponding touch chamber 60 is stored in a corresponding address of the memory 74.
根據本發明另一方面，複數個閘極信號線路36係進一步放置於基板30的一個表面，及每一個觸控室60係包含連接於導電墊50及閘極信號線路36之間的電容器54，及觸控位置偵測器70施用閘極信號至閘極信號線路36。According to another aspect of the present invention, a plurality of gate signal lines 36 are further disposed on one surface of the substrate 30, and each of the touch chambers 60 includes a capacitor 54 connected between the conductive pads 50 and the gate signal lines 36, and The touch position detector 70 applies a gate signal to the gate signal line 36.
根據本發明另一方面，複數個閘極信號線路36及子信號線路37係進一步放置於基板30的一個表面，觸控室60係包含其輸入端連接至第一信號線路32的第一切換裝置42，連接至第一切換裝置42的閘極端的導電墊50，輸入 端連接至第一切換裝置42的輸出端的第二切換裝置44，及連接在第一切換裝置42的輸出端與子信號線路37之間的電容器54，第二切換裝置44的輸入端係連接至第二信號線路34且其閘極端係連接至閘極信號線路36，及觸控位置偵測器70施用閘極信號至每一個閘極信號線路36。According to another aspect of the present invention, a plurality of gate signal lines 36 and sub-signal lines 37 are further disposed on one surface of the substrate 30, and the touch chamber 60 includes a first switching device 42 whose input terminal is connected to the first signal line 32. Connected to the conductive pad 50 of the gate terminal of the first switching device 42, input a second switching device 44 connected to the output of the first switching device 42 and a capacitor 54 connected between the output of the first switching device 42 and the sub-signal line 37. The input of the second switching device 44 is connected to The second signal line 34 and its gate terminal are connected to the gate signal line 36, and the touch position detector 70 applies a gate signal to each of the gate signal lines 36.
根據本發明另一方面，複數個閘極信號線路36係進一步放置於基板30的一個表面，觸控室60的導電墊50係包含連接至切換裝置40的閘極端的第一導電墊50a及與第一導電墊50a隔開且連接至閘極信號線路36的第二導電墊50b，及觸控位置偵測器70施用閘極信號至閘極信號線路36。According to another aspect of the present invention, a plurality of gate signal lines 36 are further disposed on one surface of the substrate 30. The conductive pads 50 of the touch chamber 60 include first conductive pads 50a connected to the gate terminals of the switching device 40 and A conductive pad 50a is spaced apart and connected to the second conductive pad 50b of the gate signal line 36, and the touch position detector 70 applies a gate signal to the gate signal line 36.
根據本發明另一方面，每一個觸控室60的第一導電墊50a及第二導電墊50b具有交替的凹處51及凸出53，凹處52及凸出54彼此嚙合。According to another aspect of the present invention, the first conductive pad 50a and the second conductive pad 50b of each touch chamber 60 have alternating recesses 51 and protrusions 53, and the recesses 52 and the protrusions 54 are engaged with each other.
根據本發明另一方面，複數個子信號線路37係進一步放置於基板30的一個表面，每一個觸控室60係包含一種切換裝置及連接至切換裝置40閘極端的導電墊50，其中切換裝置的閘極端係連接至第一信號線路32，且其輸入端及輸出端係分別連接至子信號線路37及第二信號線路34。According to another aspect of the present invention, a plurality of sub-signal lines 37 are further disposed on one surface of the substrate 30. Each of the touch chambers 60 includes a switching device and a conductive pad 50 connected to the gate terminal of the switching device 40, wherein the gate of the switching device The extremes are connected to the first signal line 32, and the input and output terminals thereof are connected to the sub-signal line 37 and the second signal line 34, respectively.
根據本發明另一方面，複數個閘極信號線路36及子信號線路37係進一步放置於基板30的一個表面，觸控室60係包含第一切換裝置42(其輸入端係連接至第一信號線路32及其閘極端係連接至閘極信號線路36)，連接至第一切換裝置42的輸出端的導電墊50，第二切換裝置44(其閘極端係連接至第一切換裝置42的輸出端及其輸入端與輸出端係分別連接至子信號線路37及第二信號線路34)，及觸 控位置偵測器70施用閘極信號至每一個閘極信號線路36。According to another aspect of the present invention, a plurality of gate signal lines 36 and sub-signal lines 37 are further disposed on one surface of the substrate 30, and the touch chamber 60 includes a first switching device 42 (the input end of which is connected to the first signal line) 32 and its gate terminal are connected to the gate signal line 36), the conductive pad 50 connected to the output end of the first switching device 42, and the second switching device 44 (the gate terminal of which is connected to the output of the first switching device 42 and The input end and the output end are respectively connected to the sub signal line 37 and the second signal line 34), and touch The position detector 70 applies a gate signal to each of the gate signal lines 36.
根據本發明另一方面，電容器54係連接於第一切換裝置42的輸出端與子信號線路37之間。According to another aspect of the invention, capacitor 54 is coupled between the output of first switching device 42 and sub-signal line 37.
根據本發明另一方面，子信號線路37係分別由第一子信號線路37a及第二子信號線路37b提供，及第二切換裝置44的輸入端係連接至第一子信號線路37a，及電容器54的一端係連接至第二子信號線路37b。According to another aspect of the present invention, the sub-signal lines 37 are respectively provided by the first sub-signal line 37a and the second sub-signal line 37b, and the input terminal of the second switching device 44 is connected to the first sub-signal line 37a, and the capacitor One end of 54 is connected to the second sub-signal line 37b.
根據本發明另一方面，透明絕緣層係塗覆於基板30的一個表面以保護觸控室60。According to another aspect of the present invention, a transparent insulating layer is applied to one surface of the substrate 30 to protect the touch chamber 60.
根據本發明，信號線路係放置於單一基板上，且觸控室包含一種三向切換裝置，該三向切換裝置連接至在基板的經分割主動區域的信號線路，及導電墊，及當身體或具類似導電性質的其他物體接觸或接近導電墊時觸控室的座標值可依據切換裝置的狀態變化得到，所以，不需基板彎曲即可產生位置偵測信號，及可防止因為於基板上的輕微觸壓而造成的信號遺失，及與彎曲型觸控面板相較，可延長本發明觸控面板的使用年限。且因為僅使用單一基板，可加強透光率及改善顯示裝置的品質，且因為其不使用任何間隔物去隔開基板，面板可製造為薄及簡單的，製造觸控面板的製程亦為簡單的。According to the present invention, the signal line is placed on a single substrate, and the touch chamber includes a three-way switching device connected to the signal line of the divided active area of the substrate, and the conductive pad, and when the body or When other objects with conductive properties contact or approach the conductive pad, the coordinate value of the touch chamber can be changed according to the state of the switching device, so that the position detection signal can be generated without bending the substrate, and the slight touch on the substrate can be prevented. The signal loss caused by the pressing and the use of the touch panel of the present invention can be extended compared with the curved touch panel. Moreover, since only a single substrate is used, the light transmittance can be enhanced and the quality of the display device can be improved, and since the spacer is not used to separate the substrate, the panel can be made thin and simple, and the manufacturing process of the touch panel is also simple. of.
且根據本發明，因為本發明藉由使用三向切換裝置獨立地辨識來自觸控室的信號，故可偵測多點碰觸。此外，其可經由良好發展的LCD或AMOLED製造方法製造以達到具低缺陷比的可靠量產。且因為位置偵測信號可由數位格式得到，響應速度非常快速，且可有效防止因為噪音或 其他環境因素造成的功能故障。且其可於日光下使用而無任何功能故障。且不需固定參考點的任何校正，及其可適當地用於大尺寸顯示面板。Moreover, according to the present invention, since the present invention independently recognizes a signal from a touch room by using a three-way switching device, multi-point touch can be detected. Furthermore, it can be manufactured via well-developed LCD or AMOLED manufacturing methods to achieve reliable mass production with low defect ratios. And because the position detection signal can be obtained in digital format, the response speed is very fast and can effectively prevent noise or Functional failure caused by other environmental factors. And it can be used in daylight without any malfunction. There is no need to fix any correction of the reference point, and it can be suitably used for a large-sized display panel.
根據本發明，藉由在基板下提供一種擴散片，可防止因為信號線路干擾的莫瑞效應。According to the present invention, by providing a diffusion sheet under the substrate, the Murray effect due to signal line interference can be prevented.
再者，根據本發明，位置偵測信號可暫時地儲存於記憶體，故當觸控信號的量增加及無法即時處理時可藉由呼叫及處理所儲存數據而防止所偵測的位置偵測信號的遺失。Furthermore, according to the present invention, the position detection signal can be temporarily stored in the memory, so that when the amount of the touch signal is increased and the processing cannot be processed immediately, the detected position detection can be prevented by calling and processing the stored data. The loss of the signal.
根據本發明，切換裝置的閘極端為浮動的，且切換裝置可由本體的靜電開或關，其可產生非常簡單的觸控面板結構。According to the present invention, the gate terminal of the switching device is floating, and the switching device can be turned on or off by the static of the body, which can produce a very simple touch panel structure.
根據本發明，在觸控室的導電墊對係以嚙合齒的型式製造，且導電墊係由本體的導電性質電連接，故接觸點可在觸控面板主動區域的任何點被辨識。According to the present invention, the conductive pad pairs of the touch chamber are fabricated in the form of meshing teeth, and the conductive pads are electrically connected by the conductive properties of the body, so that the contact points can be recognized at any point of the active area of the touch panel.
根據本發明，因為藉由使用本體的靜電電容可辨識非接觸觸控，導電墊可由保護塗層保護，或是可藉由放置於基板的下方表面上而將其隱蔽；其可防止例如ITO的透明傳導層的剝離，以達到長的產品壽命。According to the present invention, since the non-contact touch can be recognized by using the electrostatic capacitance of the body, the conductive pad can be protected by the protective coating or can be concealed by being placed on the lower surface of the substrate; it can prevent, for example, ITO. Peeling of the transparent conductive layer to achieve long product life.
此外，因為本發明的驅動IC僅傳送及接收資料且不操作負荷，其與LCD顯示裝置的閘極IC或源極IC，或是習知觸控面板的AD轉換器不同，它們需要最少的電力。特別是，接收驅動IC僅接收高阻抗信號，故幾乎不消耗電力，於是，若本發明觸控面板用於例如手機的移動裝置，可大幅增加電池的使用時間。In addition, since the driving IC of the present invention transmits and receives data only and does not operate the load, it is different from the gate IC or the source IC of the LCD display device, or the AD converter of the conventional touch panel, which requires a minimum of power. . In particular, the receiving driver IC receives only the high-impedance signal, so that almost no power is consumed. Therefore, if the touch panel of the present invention is used for a mobile device such as a mobile phone, the battery life can be greatly increased.
下文，敘述本發明較佳具體實施例。首先，本發明係關於要置於顯示面板，例如LCD、PDP、OLED及AMOLED頂部，或是要獨立使用的觸控面板，其與習知觸控面板不同。習知觸控面板中使用兩個基板，且當該兩個基板因彎曲基板而彼此接觸時產生觸控信號。根據本發明，包含例如TFT的三向切換裝置及導電墊的觸控室係形成於單一基板上，且若身體接觸或接近，其會感知TFT狀態的變化以得到觸控信號。Hereinafter, preferred embodiments of the present invention are described. First of all, the present invention relates to a touch panel to be placed on top of a display panel such as an LCD, a PDP, an OLED, and an AMOLED, or to be used independently, which is different from a conventional touch panel. Two substrates are used in the conventional touch panel, and a touch signal is generated when the two substrates are in contact with each other due to the curved substrate. According to the present invention, a touch chamber including a three-way switching device such as a TFT and a conductive pad is formed on a single substrate, and if the body is in contact or close, it senses a change in the state of the TFT to obtain a touch signal.
本發明觸控面板具一種結構，其中基板係由複數個區域分開，且包含切換裝置及連接至切換裝置閘極端的導電墊的觸控室係形成於每一個經分割區域。切換裝置的源極端(之後，稱為輸入端)及汲極端(之後，稱為輸出端)係連接至信號線路或子信號線路，且切換裝置的閘極端係連接至導電墊。閘極端為浮動狀態，由本體的靜電或靜電電容開或關，或是其可藉由自閘極信號線路接收閘極信號而開或關。當切換裝置的狀態依據施用於閘極端的電壓變化時，位置偵測信號經由信號線路接收，以得到觸控信號。The touch panel of the present invention has a structure in which a substrate is separated by a plurality of regions, and a touch chamber including a switching device and a conductive pad connected to the gate of the switching device is formed in each of the divided regions. The source terminal (hereinafter referred to as the input terminal) and the 汲 terminal (hereinafter referred to as the output terminal) of the switching device are connected to the signal line or the sub-signal line, and the gate terminal of the switching device is connected to the conductive pad. The gate is in a floating state, which is turned on or off by static or electrostatic capacitance of the body, or it can be turned on or off by receiving a gate signal from the gate signal line. When the state of the switching device changes according to the voltage applied to the gate terminal, the position detection signal is received via the signal line to obtain a touch signal.
本發明可提供各種具上文所敘述基本結構之修改，及包含如下變更：增加切換裝置至每一個觸控室，提供一對導電墊，或是加入電容器。下文所敘述具體實施例包含切換裝置的狀態係由本體的靜電所變更之具體實施例，及切換裝置的狀態係藉由導因於身體接觸而於彼此間隔的一對導電墊電連接所變更之具體實施例，及切換裝置的狀態係由本體的靜電電容所變更之具體實施例。雖然未敘述，本發明涵蓋位置偵測信號由兩個信號線路所傳送或接收，或是切換裝置與導電墊提供於每一個觸控室，使得當身體接 觸或接近導電墊時可依據切換裝置的狀態變化而得到觸控信號之具體實施例。The present invention provides various modifications of the basic structure described above, and includes the following modifications: adding a switching device to each of the touch chambers, providing a pair of conductive pads, or adding a capacitor. The specific embodiments described below include a specific embodiment in which the state of the switching device is changed by the static electricity of the body, and the state of the switching device is changed by electrically connecting a pair of conductive pads spaced apart from each other due to physical contact. The specific embodiment and the state of the switching device are specific embodiments in which the electrostatic capacitance of the body is changed. Although not described, the present invention covers that the position detection signal is transmitted or received by two signal lines, or that the switching device and the conductive pad are provided in each of the touch chambers, so that when the body is connected A specific embodiment of the touch signal can be obtained according to the state change of the switching device when the conductive pad is touched or approached.
及，本發明觸控面板可與顯示面板分開安裝，但是其可由使用類似於LCD或AMOLED顯示面板製造方法的已發展及可靠TFT製造方法製造之。之後，切換裝置可由’TFT’取代且相同數字可應用於切換裝置及TFT。Also, the touch panel of the present invention can be mounted separately from the display panel, but it can be fabricated by a developed and reliable TFT manufacturing method using a method similar to LCD or AMOLED display panel manufacturing. Thereafter, the switching means can be replaced by 'TFT' and the same number can be applied to the switching means and the TFT.
參考第2圖，單一基板30係放置於顯示裝置20頂部上，基板30係由玻璃、薄膜或是其他適當光透射物質製造。驅動ICs 71係安裝於基板30邊緣，如下文所敘述其施用位置偵測信號或閘極信號於信號線路。驅動ICs 71可分佈於邊緣，或是它們可集中或整合於邊緣的一些部分。及，驅動ICs 71可以COF(覆晶薄膜)或COG(玻璃覆晶)的形式安裝於基板30邊緣。Referring to Figure 2, a single substrate 30 is placed on top of the display device 20, which is fabricated from glass, film or other suitable light transmissive material. The driver ICs 71 are mounted on the edge of the substrate 30, as described below, applying a position detection signal or a gate signal to the signal line. The driver ICs 71 can be distributed at the edges, or they can be concentrated or integrated into portions of the edges. Further, the driver ICs 71 may be mounted on the edge of the substrate 30 in the form of a COF (Crystalline Film) or COG (Crystal Overlay).
雖然在第2圖示出本發明觸控面板為放置於顯示裝置20頂部上，本發明觸控面板包含單一基板，故其可嵌於顯示裝置20中而不損及顯示裝置的微薄及小型尺寸。例如，在LCD面板的情況，本發明的單一觸控面板可組裝於液晶面板上，其中TFT基板及彩色濾光片結合，接著偏光板置於其上，及此結合面板可裝設於BLU室。Although the touch panel of the present invention is placed on the top of the display device 20 in FIG. 2, the touch panel of the present invention includes a single substrate, so that it can be embedded in the display device 20 without damaging the slim and small size of the display device. . For example, in the case of an LCD panel, the single touch panel of the present invention can be assembled on a liquid crystal panel in which a TFT substrate and a color filter are combined, and then a polarizing plate is placed thereon, and the combined panel can be installed in the BLU chamber. .
第3圖顯示根據本發明具體實施例觸控面板的示意圖。複數個第一信號線路32及第二信號線路34係放置於基板30的一個表面。第一信號線路32要傳送位置偵測信號，及第二信號線路34要接收位置偵測信號，在第3圖顯示信號線路32、34為彼此交叉，但是它們可以平行配置，或是它們可以傾斜放置。FIG. 3 is a schematic view showing a touch panel according to an embodiment of the present invention. A plurality of first signal lines 32 and second signal lines 34 are placed on one surface of the substrate 30. The first signal line 32 is to transmit the position detection signal, and the second signal line 34 is to receive the position detection signal. In the third figure, the signal lines 32, 34 are crossed to each other, but they may be arranged in parallel or they may be tilted. Place.
三向切換裝置40係連接於第一信號線路32及第二信 號線路34之間，及三向切換裝置40的閘極端係連接至導電墊50以形成觸控室60。較佳為，三向切換裝置40為TFT。如圖所示，TFT 40的輸入端係連接至第一信號線路32，及TFT 40的輸出端係連接至第二信號線路34。所以，若施用Off電壓於閘極端，則第一信號線路32及第二信號線路34係彼此不連接。若施用On電壓於閘極端，則第一信號線路32及第二信號線路34係彼此連接，故位置偵測信號可自第一信號線路32傳送至第二信號線路34。The three-way switching device 40 is connected to the first signal line 32 and the second signal The gate terminals 34 and the gate terminals of the three-way switching device 40 are connected to the conductive pads 50 to form the touch chamber 60. Preferably, the three-way switching device 40 is a TFT. As shown, the input of TFT 40 is coupled to first signal line 32, and the output of TFT 40 is coupled to second signal line 34. Therefore, if the Off voltage is applied to the gate terminal, the first signal line 32 and the second signal line 34 are not connected to each other. If the On voltage is applied to the gate terminal, the first signal line 32 and the second signal line 34 are connected to each other, so that the position detection signal can be transmitted from the first signal line 32 to the second signal line 34.
導電墊50係藉由施用例如ITO的透明導電物質於基板30的頂部而形成。可放置導電墊50以覆蓋觸控室60所有區域，但是，較佳為，其可置於觸控室60部份區域上，例如，碰觸基板30的手指末端寬度為約數毫米，若觸控室60的寬度小於手指末端寬度，則即使導電墊50僅覆蓋觸控室60的部份區域，觸控室仍可接觸手指。較佳為，導電墊50係放置以與信號線路32、34其中一個對準。若導電墊50僅覆蓋觸控室60的部份區域或是其放置以與信號線路32、34對準，則觸控面板的透光率可大幅增加。The conductive pad 50 is formed on the top of the substrate 30 by applying a transparent conductive material such as ITO. The conductive pad 50 may be placed to cover all areas of the touch chamber 60, but preferably, it may be placed on a partial area of the touch room 60. For example, the width of the finger end of the touch substrate 30 is about several millimeters, if the touch chamber 60 is The width is smaller than the width of the end of the finger, and even if the conductive pad 50 covers only a part of the area of the touch chamber 60, the touch room can still contact the finger. Preferably, the conductive pads 50 are placed to align with one of the signal lines 32, 34. If the conductive pad 50 covers only a portion of the touch chamber 60 or is placed to align with the signal lines 32, 34, the light transmittance of the touch panel can be greatly increased.
觸控室60係藉由分割面板的主動區域形成，於此進行實際接觸，且觸控室60以類似於LCD面板的像素陣列的矩陣格式配置，本發明的觸控室60較佳為具有較顯示裝置20解晰度成整數比減少的解晰度，因為較佳為導電墊50的尺寸較顯示裝置20的像素尺寸大，以確保可靠的接觸信號。但是，觸控室60的解晰度可與顯示裝置20的像素的解晰度相同或較之為大。The touch chamber 60 is formed by the active area of the split panel, where the actual contact is made, and the touch chamber 60 is arranged in a matrix format similar to the pixel array of the LCD panel. The touch chamber 60 of the present invention preferably has a display device 20 The resolution is reduced to an integer ratio reduction because the size of the conductive pad 50 is preferably larger than the pixel size of the display device 20 to ensure a reliable contact signal. However, the resolution of the touch chamber 60 may be the same as or larger than the resolution of the pixels of the display device 20.
若觸控室60的解晰度與顯示裝置20的解晰度相同或是成整數比減少，觸控面板的第一信號線路32與第二信號 線路34的線路型式可與顯示裝置的閘極線路與資料線路的線路型式對準，其會增強觸控面板的透射率及顯示裝置20的品質，及防止因信號線路之間的干擾而顯示波形的莫瑞效應。If the resolution of the touch chamber 60 is the same as the resolution of the display device 20 or decreases in an integer ratio, the first signal line 32 and the second signal of the touch panel The line type of the line 34 can be aligned with the line pattern of the gate line and the data line of the display device, which enhances the transmittance of the touch panel and the quality of the display device 20, and prevents the waveform from being displayed due to interference between the signal lines. The Murray effect.
第4圖顯示防止莫瑞效應的另一種方法，在此方法擴散片90係額外放置於基板30下方，即使觸控面板的線路圖樣未與顯示面板20的線路圖樣對準，其仍可預防莫瑞現象。回到第3圖，觸控面板具3*3解晰度的範例僅用於說明，且下列實例亦以具3*3解晰度敘述之。FIG. 4 shows another method of preventing the Murray effect. In this method, the diffusion sheet 90 is additionally placed under the substrate 30, and even if the line pattern of the touch panel is not aligned with the line pattern of the display panel 20, it can prevent Mo. Rui phenomenon. Returning to Figure 3, the touch panel has a 3*3 resolution example for illustration only, and the following examples are also described with 3*3 resolution.
第5圖顯示本發明的系統，其包含一種觸控位置偵測器70，觸控位置偵測器70包含驅動IC71、時脈控制器72、信號處理器73及記憶體74。在觸控位置偵測器70所得到的觸控信號傳送至CPU 75以產生對應於觸控位置座標值的輸入信號。FIG. 5 shows a system of the present invention including a touch position detector 70. The touch position detector 70 includes a drive IC 71, a clock controller 72, a signal processor 73, and a memory 74. The touch signal obtained by the touch position detector 70 is transmitted to the CPU 75 to generate an input signal corresponding to the touch position coordinate value.
驅動ICs71施用位置偵測信號至第一信號線路32及自第二信號線路34接收信號，驅動IC 71係以COG或COF的形式裝設於基板30邊緣。且於下文所敘述具體實施例中，驅動ICs 71可分別施用閘極信號及子信號至閘極信號線路36及子信號線路37。The driving ICs 71 apply a position detection signal to the first signal line 32 and receive signals from the second signal line 34. The driving IC 71 is mounted on the edge of the substrate 30 in the form of COG or COF. In the specific embodiments described below, the driver ICs 71 can apply gate signals and sub-signals to the gate signal line 36 and the sub-signal line 37, respectively.
較佳為，驅動IC71循序施用掃描脈衝至每一個第一信號線路32，為進行此，時脈控制器72產生數十毫秒或更低的時間分割信號，信號處理器73根據來自時脈控制器72的時脈提供第6圖的脈衝至驅動IC71。參考第6圖，驅動IC71分別施用時間分割位置偵測信號D1、D2及D3至每一個第一信號線路32。每一個脈衝的週期為T。Preferably, the driving IC 71 sequentially applies the scan pulse to each of the first signal lines 32. To do this, the clock controller 72 generates a time division signal of several tens of milliseconds or less, and the signal processor 73 is based on the slave clock controller. The clock of 72 provides the pulse of Fig. 6 to the driver IC 71. Referring to FIG. 6, the drive IC 71 applies time division position detecting signals D1, D2, and D3 to each of the first signal lines 32, respectively. The period of each pulse is T.
若身體接觸發生於第3圖的右下方觸控室60，則因為 身體靜電的On電壓施用於在相對應觸控室60的TFT40，且TFT40將會被電連接。據此，在位置偵測信號被施用於第一信號線路32的當時，位置偵測信號可自觸控室60的相對應第二信號線路34得到。參考第6圖，示出位置偵測信號S3係在時間t3~t4經由最右方第二信號線路34得到，所得到觸控信號傳送至信號處理器73，且觸控位置偵測器70得到對應於座標值D3、S3的觸控信號。亦即，若脈衝信號D3產生及得到信號S3，則其表示接觸發生於座標D3、S3。If physical contact occurs in the right lower touch chamber 60 of Figure 3, The On voltage of the body static electricity is applied to the TFT 40 in the corresponding touch chamber 60, and the TFT 40 will be electrically connected. Accordingly, the position detection signal can be obtained from the corresponding second signal line 34 of the touch chamber 60 when the position detection signal is applied to the first signal line 32. Referring to FIG. 6, the position detection signal S3 is obtained through the rightmost second signal line 34 at time t3~t4, the obtained touch signal is transmitted to the signal processor 73, and the touch position detector 70 is obtained. Touch signals corresponding to coordinate values D3, S3. That is, if the pulse signal D3 is generated and the signal S3 is obtained, it indicates that the contact occurs at the coordinates D3, S3.
但是，在資料處理期間，觸控位置偵測器70可能為"忙碌的"且無法捕獲位置偵測信號，接著遺失信號無法恢復且觸控面板的可靠性減少。為避免此情況，觸控位置偵測器70具有記憶體74，該記憶體74具有較觸控室60數目為多的位元。如第7圖所示，記憶體75具有對應於觸控室60座標值的絕對位址。在此具體實施例中，記憶體74具有至少9位元的容量，由觸控位置偵測器70所接收的位置偵測信號可以座標值"D3,S3"儲存於位址"m9"。所儲存信號資料可由信號處理器73叫出及使用。例如，每一次觸控位置偵測器70掃瞄施用於施用於第一信號線路32的所有位置偵測信號之後，其讀取記憶體74以檢查所遺失信號是否存在。若觸控室60的解晰度為1366*768，則記憶體74的容量需要至少1049088位元，故約132千位元組要被掃描。However, during data processing, the touch position detector 70 may be "busy" and cannot capture the position detection signal, and then the lost signal cannot be recovered and the reliability of the touch panel is reduced. To avoid this, the touch position detector 70 has a memory 74 having a larger number of bits than the touch chamber 60. As shown in FIG. 7, the memory 75 has an absolute address corresponding to the coordinate value of the touch room 60. In this embodiment, the memory 74 has a capacity of at least 9 bits, and the position detection signal received by the touch position detector 70 can be stored in the address "m9" with the coordinate value "D3, S3". The stored signal data can be called and used by the signal processor 73. For example, each time the touch position detector 70 scans all of the position detection signals applied to the first signal line 32, it reads the memory 74 to check for the presence of the missing signal. If the resolution of the touch chamber 60 is 1366*768, the capacity of the memory 74 needs to be at least 1049088 bits, so about 132 kilobytes are to be scanned.
根據本發明，基本上例如TFT 40的三向切換裝置裝設於每一個觸控室60，TFT40具有許多優點，其在LCD或AMOLED領域為已建立及認證的裝置。例如，本發明的觸控面板可藉由使用習知LCD製程製造，這使得具可靠品質 及低成本的量產為可行。In accordance with the present invention, a three-way switching device such as TFT 40 is mounted in each of the touch chambers 60. The TFT 40 has a number of advantages in that it is an established and certified device in the field of LCD or AMOLED. For example, the touch panel of the present invention can be manufactured by using a conventional LCD process, which makes reliable quality And low-cost mass production is feasible.
提供例如TFT40的三向切換裝置於每一個觸控室60的主要優點為多點接觸可藉由使用TFT40分隔在每一個觸控室60的信號而辨識。The main advantage of providing a three-way switching device such as TFT 40 to each of the touch chambers 60 is that multi-point contact can be identified by using the TFT 40 to separate the signals in each of the touch chambers 60.
第8及9圖顯示另一具體實施例，其中TFT40的狀態係藉由使用身體靜電而變化。與第3圖不同的是第一信號線路32及第二信號線路34係平行放置，但它們可以交叉或傾斜陣列放置。一般而言，TFT40閘極端的阻抗非常高，例如數十百萬歐姆，所以若閘極端為浮動的，當手指25或身體其他部份接觸閘極端時，TFT40可藉由使用本體的靜電被開或關。此具體實施例提供新的觸控面板以藉由使用身體靜電變更TFT40的狀態。Figures 8 and 9 show another embodiment in which the state of the TFT 40 is varied by using body static electricity. Different from FIG. 3, the first signal line 32 and the second signal line 34 are placed in parallel, but they may be placed in a crossed or oblique array. In general, the impedance of the TFT40 gate terminal is very high, such as tens of millions of ohms, so if the gate terminal is floating, when the finger 25 or other parts of the body contact the gate terminal, the TFT 40 can be opened by using the static electricity of the body. Or off. This embodiment provides a new touch panel to change the state of the TFT 40 by using body static electricity.
參考第8圖，除了第3圖的基本結構之外，複數個閘極信號線路36進一步提供於基板30上，且觸控室60進一步包含連接於導電墊50及閘極信號線路36之間的電容器54。觸控位置偵測器70循序施用掃描脈衝至每一個閘極信號線路36，與第6圖的波不同，施用於第一信號線路32的位置偵測信號不需為時間分割信號，但當施用閘極信號時其應僅維持在On狀態。亦即，若閘極信號G1、G2與G3其中一個為On時，則Dn為On，且在G1、G2與G3之間的休眠期期間Dn亦具休眠期。Dn亦可連續施用。在該具體實施例中，閘極信號的閘極Off電壓是負的，且閘極On電壓是零或正的，且閘極電壓可依據施用於第一信號線路32的電壓決定之。Referring to FIG. 8, in addition to the basic structure of FIG. 3, a plurality of gate signal lines 36 are further provided on the substrate 30, and the touch chamber 60 further includes a capacitor connected between the conductive pad 50 and the gate signal line 36. 54. The touch position detector 70 sequentially applies a scan pulse to each of the gate signal lines 36. Unlike the wave of FIG. 6, the position detection signal applied to the first signal line 32 does not need to be a time division signal, but when applied The gate signal should only remain in the On state. That is, if one of the gate signals G1, G2, and G3 is On, Dn is On, and Dn also has a sleep period during the sleep period between G1, G2, and G3. Dn can also be administered continuously. In this particular embodiment, the gate Off voltage of the gate signal is negative, and the gate On voltage is zero or positive, and the gate voltage can be determined in accordance with the voltage applied to the first signal line 32.
在第8圖中若接觸發生於觸控室60的其中一個，電容器儲存由身體靜電所產生的電荷，接著，若相對應觸控室 60的閘極端是在被施用閘極Off電壓的狀態，即使電容器54是在充電步驟或是在全充電狀態，但是電容器54的基極電壓為低的，故無法電連接TFT40。若施用閘極On電壓於相對應觸控室60的閘極端，閘極電壓上升至較未充電觸控室的閘極電壓高，故可電連接TFT40。所以，偵測到從第二信號線路34接收的信號，並得到觸控信號。In FIG. 8, if the contact occurs in one of the touch chambers 60, the capacitor stores the electric charge generated by the static electricity of the body, and then, if corresponding to the touch chamber The gate terminal of 60 is in a state in which the gate off voltage is applied. Even if the capacitor 54 is in the charging step or in the fully charged state, the base voltage of the capacitor 54 is low, so that the TFT 40 cannot be electrically connected. If the gate On voltage is applied to the gate terminal of the corresponding touch chamber 60, the gate voltage rises to a higher gate voltage than the uncharged touch chamber, so that the TFT 40 can be electrically connected. Therefore, the signal received from the second signal line 34 is detected and the touch signal is obtained.
為藉由充電電容器54達到電連接，閘極On電壓應選擇為零或正電壓，且位置偵測信號Dn的電壓較佳為較閘極電壓低3伏特或更多。已知由身體產生的電壓為約3伏特，所以，若電容器的電壓為3或4伏特，且此電壓全都施用於閘極端，當施用5伏特Dn電壓時，TFT40不會電連接。若Dn電壓為1伏特，則藉由由身體產生的3伏特相對低電壓可確保TFT40的可靠電連接。In order to achieve electrical connection by the charging capacitor 54, the gate On voltage should be selected to be zero or a positive voltage, and the voltage of the position detecting signal Dn is preferably 3 volts or more lower than the gate voltage. It is known that the voltage generated by the body is about 3 volts, so if the voltage of the capacitor is 3 or 4 volts, and this voltage is all applied to the gate terminal, the TFT 40 is not electrically connected when a voltage of 5 volts Dn is applied. If the Dn voltage is 1 volt, a reliable electrical connection of the TFT 40 can be ensured by a relatively low voltage of 3 volts generated by the body.
參考第9圖，除了第3圖的基本結構之外，複數個閘極信號線路36及子信號線路37進一步放置於基板30上，且觸控室60進一步包含第一切換裝置42、連接至第一切換裝置42閘極端的導電墊50、第二切換裝置44及連接於第一切換裝置42的輸出端與子信號線路37之間的電容器54。第一切換裝置42的輸入端係連接至第一信號線路32。第二切換裝置44的輸入端係連接至第一切換裝置42的輸出端，其輸出端係連接至第二信號線路34，及其閘極端係連接至閘極信號線路36。Referring to FIG. 9, in addition to the basic structure of FIG. 3, a plurality of gate signal lines 36 and sub-signal lines 37 are further disposed on the substrate 30, and the touch chamber 60 further includes a first switching device 42 connected to the first The conductive pad 50 of the gate terminal of the switching device 42, the second switching device 44, and the capacitor 54 connected between the output of the first switching device 42 and the sub-signal line 37. The input of the first switching device 42 is connected to the first signal line 32. The input of the second switching device 44 is connected to the output of the first switching device 42, the output of which is connected to the second signal line 34, and its gate terminal is connected to the gate signal line 36.
在此具體實施例中，觸控位置偵測器70循序施用掃描脈衝至每一個閘極信號線路36，施用與閘極信號Gn同步的信號至子信號線路37，或是可不斷地施用接地電壓。位置偵測信號Dn係由固定的Hi脈衝施用，或是其可由與 Gn同步的脈衝施用。In this embodiment, the touch position detector 70 sequentially applies scan pulses to each of the gate signal lines 36, applies a signal synchronized with the gate signal Gn to the sub-signal line 37, or continuously applies the ground voltage. . The position detection signal Dn is applied by a fixed Hi pulse, or it can be Pulsed application of Gn synchronization.
在此具體實施例中，閘極Off電壓為-7伏特，而On電壓為15伏特。經由子信號線路施用的子信號與閘極信號同步，故若閘極信號為Hi，則施用Hi位準信號，而若閘極信號為low，則施用Low位準信號。較佳為，Hi位準子信號為0伏特，及Low位準子信號為-15伏特。In this embodiment, the gate Off voltage is -7 volts and the On voltage is 15 volts. The sub-signal applied via the sub-signal line is synchronized with the gate signal, so if the gate signal is Hi, the Hi level signal is applied, and if the gate signal is low, the Low level signal is applied. Preferably, the Hi level signal is 0 volts and the Low level signal is -15 volts.
若身體接觸任何觸控室60，第一TFT 42藉由施用於相對應觸控室60的導電墊50的身體靜電而電連接，接著電容器54充電。若閘極信號經由閘極信號線路36施用，則Hi位準子信號經由子信號線路37同步地施用於電容器54另一端。所以，電容器54中充電的電壓由第二切換裝置44電連接，故位置偵測信號可經由第二信號線路34得到，且觸控位置偵測器70讀取所輸入位置偵測信號以得到觸控信號。If the body contacts any of the touch chambers 60, the first TFTs 42 are electrically connected by static electricity applied to the body of the conductive pads 50 corresponding to the touch chamber 60, and then the capacitors 54 are charged. If the gate signal is applied via the gate signal line 36, the Hi level signal is applied synchronously to the other end of the capacitor 54 via the sub-signal line 37. Therefore, the voltage charged in the capacitor 54 is electrically connected by the second switching device 44, so that the position detection signal can be obtained via the second signal line 34, and the touch position detector 70 reads the input position detection signal to obtain the touch. Control signal.
在一個循環讀取完成後，第9圖的具體實施例必須放電電容器54以進行下一個循環讀取。為達此目的，施用15伏特至所有閘極信號線路36以使所有第二TFT44電連接，並施用零電壓於第二信號線路34。此放電作用可在下一個循環讀取的短暫等待時間期間進行。After a cyclic read is completed, the particular embodiment of Figure 9 must discharge capacitor 54 for the next cycle of reading. To this end, 15 volts are applied to all of the gate signal lines 36 to electrically connect all of the second TFTs 44 and apply zero voltage to the second signal line 34. This discharge can be performed during the short waiting time of the next cycle read.
第10圖顯示一種具體實施例，其中TFT40的狀態係藉由使用身體導電度變更。因為身體具導電性質，若身體接觸具不同電壓位準的兩個導電墊，則可電連接導電墊。因為身體的阻抗高，故在訊號間隔大時電連接該兩個導電墊很困難，但若訊號間隔為約數微秒，則可藉由身體接觸電連接導電墊。Figure 10 shows a specific embodiment in which the state of the TFT 40 is changed by using body conductivity. Because the body has conductive properties, if the body contacts two conductive pads with different voltage levels, the conductive pads can be electrically connected. Because the impedance of the body is high, it is difficult to electrically connect the two conductive pads when the signal interval is large, but if the signal interval is about several microseconds, the conductive pads can be electrically connected by body contact.
參考第10圖，除了第3圖的基本結構之外，複數個閘 極信號線路36進一步放置於基板30上，且觸控室60的導電墊50包含連接至TFT40閘極端的第一導電墊50a及與該第一導電墊50a分開並連接至閘極信號線路36的第二導電墊50b。觸控位置偵測器70循序施用掃描脈衝至每一個閘極信號線路36，施用於第一信號線路32的位置偵測信號為固定的Hi脈衝，或是其可為一種當閘極信號Gn的其中一個為On時維持在On狀態的信號。Referring to Figure 10, in addition to the basic structure of Figure 3, a plurality of gates The pole signal line 36 is further disposed on the substrate 30, and the conductive pad 50 of the touch chamber 60 includes a first conductive pad 50a connected to the gate terminal of the TFT 40 and a portion separated from the first conductive pad 50a and connected to the gate signal line 36. Two conductive pads 50b. The touch position detector 70 sequentially applies a scan pulse to each of the gate signal lines 36, and the position detection signal applied to the first signal line 32 is a fixed Hi pulse, or it may be a gate signal Gn. One of them is a signal that remains in the On state when On.
第11圖為一種第10圖具體實施例的配置圖，其顯示觸控室60於基板30上的形成，第一信號線路32係縱向地放置，及第二信號線路34與閘極信號線路36係橫向地放置。第一導電墊50a及第二導電墊50b係為交替具有凹處51及凸出53的齒狀，且凹處51及凸出53以具有間隙的方式彼此嚙合。根據此結構，第一導電墊50a及第二導電墊50b保持非常小的間隙，即使身體接觸觸控室60的任何部份，該兩個導電墊50a、50b可電連接。且例如鋼筆的任何其他導電物體可電連接導電墊50a、50b。11 is a configuration diagram of a specific embodiment of FIG. 10, showing the formation of the touch chamber 60 on the substrate 30, the first signal line 32 is placed longitudinally, and the second signal line 34 and the gate signal line 36 are Place it horizontally. The first conductive pad 50a and the second conductive pad 50b are in a tooth shape alternately having a recess 51 and a protrusion 53, and the recess 51 and the protrusion 53 are engaged with each other with a gap. According to this configuration, the first conductive pad 50a and the second conductive pad 50b maintain a very small gap, and the two conductive pads 50a, 50b can be electrically connected even if the body contacts any portion of the touch chamber 60. And any other electrically conductive object such as a pen can electrically connect the conductive pads 50a, 50b.
如在第11圖所示，TFT40的閘極端56係連接至第一導電墊50a，TFT40的源極端57係連接至第一信號線路32，及汲極端52係連接至第二信號線路34。信號線路包含放置於基板30上的經絕緣閘極金屬與源極金屬，且TFT40的端子包含多層結構的經絕緣閘極金屬、源極金屬及非晶形矽。為連接導電墊50及TFT40至信號線路，使用由ITO接點方法所形成的接點59。As shown in Fig. 11, the gate terminal 56 of the TFT 40 is connected to the first conductive pad 50a, the source terminal 57 of the TFT 40 is connected to the first signal line 32, and the 汲 terminal 52 is connected to the second signal line 34. The signal line includes an insulated gate metal and a source metal disposed on the substrate 30, and the terminals of the TFT 40 include an insulated gate metal, a source metal, and an amorphous germanium of a multilayer structure. To connect the conductive pad 50 and the TFT 40 to the signal line, a contact 59 formed by the ITO contact method is used.
若身體接觸任何觸控室60，則導電墊50a、50b對會彼此電連接，而當閘極信號經由閘極信號線路36施用時，會電連接TFT40。接著，觸控位置偵測器70可自第二信號 線路34接收位置偵測信號及得到觸控信號。若，在第10圖，施用信號G3及接收信號S3，觸控位置偵測器70可得到座標值D3、S3。If the body contacts any of the touch chambers 60, the pairs of conductive pads 50a, 50b are electrically connected to each other, and when the gate signals are applied via the gate signal lines 36, the TFTs 40 are electrically connected. Then, the touch position detector 70 can be from the second signal. Line 34 receives the position detection signal and obtains a touch signal. If, in FIG. 10, the signal G3 and the received signal S3 are applied, the touch position detector 70 can obtain the coordinate values D3, S3.
第12至18圖顯示一種具體實施例，其中TFT40的狀態係根據身體相關於導電墊50的接觸或接近而藉由使用在導電墊50與身體之間所產生的電容變更。參考第12圖，手指25以間隔’d’接近導電墊50，如在相效電路圖所示，則電容C可存在於手指25與導電墊50之間。地球做為虛擬接地。例如，當身體接觸導電墊且地球做為虛擬接地，電容為10~20pF，而當身體無接觸地接近導電層時靜電電容為約2~5pF。本發明利用導電墊50與身體之間的電容特性得到接觸式或非接觸式可辨識多點接觸的觸控面板。Figures 12 through 18 show a specific embodiment in which the state of the TFT 40 is altered by the use of capacitance between the conductive pad 50 and the body in accordance with the body's contact or proximity to the conductive pad 50. Referring to Fig. 12, the finger 25 approaches the conductive pad 50 at an interval 'd', as shown in the phase effect circuit diagram, the capacitance C may be present between the finger 25 and the conductive pad 50. The earth is used as a virtual ground. For example, when the body touches the conductive pad and the earth is used as a virtual ground, the capacitance is 10-20 pF, and the electrostatic capacitance is about 2~5 pF when the body approaches the conductive layer without contact. The invention utilizes the capacitive characteristics between the conductive pad 50 and the body to obtain a touch panel with contact or non-contact identifiable multi-point contact.
此具體實施例可藉由非接觸方法辨識觸控信號，此方法具許多優點。上文所提及的具體實施例為一種感知軟接觸的結構，故導電墊50應放置於基板30外，但導電墊50應由透明物質(例如TNO)塗佈以防止導電墊50被刮傷，其會增加製程成本。但是，在此具體實施例中，包含導電墊50的觸控室60可由例如薄膜、塑膠、有機絕緣層及穿透式黏合劑的透明絕緣層塗佈，或是放置導電墊50於基板30後方，可不施用任何塗層於觸控室60上。藉此，可避免保護導電墊50的製程之高成本，及可更穩固地放置導電墊50以增加顯示面板的耐久性。This particular embodiment can identify touch signals by a non-contact method, which has many advantages. The specific embodiment mentioned above is a structure that senses soft contact, so the conductive pad 50 should be placed outside the substrate 30, but the conductive pad 50 should be coated with a transparent substance (for example, TNO) to prevent the conductive pad 50 from being scratched. It will increase the cost of the process. However, in this embodiment, the touch chamber 60 including the conductive pad 50 may be coated with a transparent insulating layer such as a film, a plastic, an organic insulating layer, and a transmissive adhesive, or a conductive pad 50 may be placed behind the substrate 30. No coating may be applied to the touch chamber 60. Thereby, the high cost of the process of protecting the conductive pad 50 can be avoided, and the conductive pad 50 can be placed more stably to increase the durability of the display panel.
參考第13圖，除了第3圖的基本結構之外，複數個子信號線路37進一步放置於基板30上，且觸控室60包含TFT40及導電墊50。TFT40的閘極端係連接至第一信號線路32，其輸入端係連接至子信號線路37，及其輸出端係連 接至第二信號線路34。導電墊50係連接至TFT40的閘極端。觸控位置偵測器70循序施用掃描脈衝至子信號線路37以藉由TFT40的電連接得到觸控信號。在此具體實施例中，施用於第一信號線路32的信號應使TFT40在高阻抗。例如，驅動IC71輸出必要信號至第一信號線路32，及接著保持第一信號線路32在高阻抗狀態。Referring to FIG. 13, in addition to the basic structure of FIG. 3, a plurality of sub-signal lines 37 are further placed on the substrate 30, and the touch chamber 60 includes the TFT 40 and the conductive pads 50. The gate terminal of the TFT 40 is connected to the first signal line 32, the input end thereof is connected to the sub-signal line 37, and its output terminal is connected Connected to the second signal line 34. The conductive pad 50 is connected to the gate terminal of the TFT 40. The touch position detector 70 sequentially applies scan pulses to the sub-signal lines 37 to obtain touch signals by electrical connection of the TFTs 40. In this particular embodiment, the signal applied to the first signal line 32 should be such that the TFT 40 is at a high impedance. For example, the driver IC 71 outputs the necessary signal to the first signal line 32, and then maintains the first signal line 32 in a high impedance state.
第14圖顯示一種具體實施例，其中使用兩個切換裝置42、44以偵測接觸位置。第14圖的具體實施例的觸控室60包含兩個切換裝置42、44時，即使自驅動IC71至第一信號線路32的輸出不在高阻抗，在導電墊50的信號可藉由第一TFT42保持在高阻抗。所以，此具體實施例會有較第13圖為低的透射率之問題，但是其可提供每一個信號都被處理的非常可靠的觸控偵測方法。Figure 14 shows a specific embodiment in which two switching devices 42, 44 are used to detect the contact position. When the touch chamber 60 of the specific embodiment of FIG. 14 includes two switching devices 42, 44, even if the output from the driving IC 71 to the first signal line 32 is not high impedance, the signal on the conductive pad 50 can be held by the first TFT 42. At high impedance. Therefore, this embodiment will have a lower transmittance than that of Fig. 13, but it can provide a very reliable touch detection method in which each signal is processed.
參考第14圖，除了第3圖的基本結構之外，複數個閘極信號線路36及子信號線路37進一步放置於基板30上，且觸控室60包含第一TFT42、導電墊50及第二TFT44。第一TFT42的輸出端係連接至第一信號線路32，而其閘極端係連接至閘極信號線路36。導電墊50係連接至第一TFT 42的輸出端。第二TFT44的閘極端係連接至第一TFT42的輸出端，其輸入端係連接至子信號線路37，及其輸出端係連接至第二信號線路34。觸控位置偵測器70循序施用掃描脈衝至每一個閘極信號線路36以循序電連接第一TFT42，或是藉由同時開啟閘極信號Gn，並以身體誘發電荷，接著循序電連接子信號線路37，如此可偵測接觸位置。Referring to FIG. 14, in addition to the basic structure of FIG. 3, a plurality of gate signal lines 36 and sub-signal lines 37 are further disposed on the substrate 30, and the touch chamber 60 includes a first TFT 42, a conductive pad 50, and a second TFT 44. . The output of the first TFT 42 is connected to the first signal line 32, and its gate terminal is connected to the gate signal line 36. The conductive pad 50 is connected to the output end of the first TFT 42. The gate terminal of the second TFT 44 is connected to the output terminal of the first TFT 42, the input terminal thereof is connected to the sub-signal line 37, and the output terminal thereof is connected to the second signal line 34. The touch position detector 70 sequentially applies scan pulses to each of the gate signal lines 36 to sequentially electrically connect the first TFTs 42, or simultaneously turns on the gate signals Gn, and induces charges by the body, and then sequentially connects the sub-signals. Line 37, which detects the contact position.
第15圖為第14圖的具體實施例的觸控室單元60之平面視圖。第一信號線路32及第二信號線路34係縱向地放 置於基板30上，而閘極信號線路36及子信號線路37係橫向地放置。導電墊50係以足夠大的面積形成於觸控室60上。導電墊50可與信號線路32、34重疊，或是可延伸通過由信號線路32、34分隔的區域。第一TFT42的閘極端56係連接至閘極信號線路36，及第一TFT42的源極端57係連接至第一信號線路32，及第一TFT42的汲極端58係連接至導電墊50。第二TFT44的閘極端56係連接至第一TFT42的汲極端58，源極端57係連接至子信號線路37，及汲極端58係連接至第二信號線路34。信號線路係以源極金屬或閘極金屬以多層形成於基板30上，TFT 42、44的端點係以由絕緣層絕緣的多層結構的閘極金屬、源極金屬及非晶形矽形成。為連接導電墊50或TFT40至信號線路，使用由ITO接點方法所形成的接點59。光阻擋層可放置於每一個TFT42、44最上方表面，以防止因為最外面的光所造成的TFT功能故障。Figure 15 is a plan view of the touch chamber unit 60 of the embodiment of Figure 14. The first signal line 32 and the second signal line 34 are placed longitudinally Placed on the substrate 30, and the gate signal line 36 and the sub-signal line 37 are placed laterally. The conductive pad 50 is formed on the touch chamber 60 with a sufficiently large area. The conductive pads 50 may overlap the signal lines 32, 34 or may extend through regions separated by signal lines 32, 34. The gate terminal 56 of the first TFT 42 is connected to the gate signal line 36, and the source terminal 57 of the first TFT 42 is connected to the first signal line 32, and the drain terminal 58 of the first TFT 42 is connected to the conductive pad 50. The gate terminal 56 of the second TFT 44 is connected to the 汲 terminal 58 of the first TFT 42, the source terminal 57 is connected to the sub signal line 37, and the 汲 terminal 58 is connected to the second signal line 34. The signal lines are formed on the substrate 30 in a plurality of layers by source metal or gate metal. The terminals of the TFTs 42 and 44 are formed of a gate metal, a source metal, and an amorphous germanium of a multilayer structure insulated by an insulating layer. To connect the conductive pad 50 or the TFT 40 to the signal line, a contact 59 formed by the ITO contact method is used. A light blocking layer can be placed on the uppermost surface of each of the TFTs 42, 44 to prevent malfunction of the TFT due to the outermost light.
第16圖為第14圖的具體實施例的脈波圖。觸控位置偵測器70循序施用掃描脈衝至每一個閘極信號線路36，由觸控位置偵測器70施用的閘極信號Gn具有足以使第一TFT 42的閘極端成為主動狀態的足夠電壓位準。例如，閘極信號Gn的電壓位準設定為較自第一信號線路32的位置偵測信號Dn高3伏特。較佳為，Dn的Hi位準電壓為13伏特，及Gn的Hi位準電壓為18伏特。將第一TFT 43穩定地關閉的閘極Off電壓為-5~-7伏特。Figure 16 is a pulse diagram of a specific embodiment of Figure 14. The touch position detector 70 sequentially applies a scan pulse to each of the gate signal lines 36, and the gate signal Gn applied by the touch position detector 70 has a sufficient voltage sufficient to make the gate terminal of the first TFT 42 active. Level. For example, the voltage level of the gate signal Gn is set to be 3 volts higher than the position detection signal Dn from the first signal line 32. Preferably, the Hi level voltage of Dn is 13 volts, and the Hi level voltage of Gn is 18 volts. The gate Off voltage for stably turning off the first TFT 43 is -5 to -7 volts.
閘極信號Gn在每一個信號之間具有足夠的監測期，以獲得在手指25及導電墊50之間形成的虛擬電容器的足夠充電時間。如圖所示，足夠的監看時間1的休眠期係提 供於G1與G2之間。來自第一信號線路32的位置偵測信號Dn係以一種方式施用使得若Gn的任何一個在Hi狀態，則Hi位準信號應保持為必要，且較佳為若Gn具有關斷(off)狀態，Dn亦可些微具有關斷狀態。The gate signal Gn has a sufficient period of monitoring between each signal to obtain sufficient charging time for the dummy capacitor formed between the finger 25 and the conductive pad 50. As shown in the figure, sufficient monitoring time 1 sleep period For between G1 and G2. The position detecting signal Dn from the first signal line 32 is applied in such a manner that if any one of Gn is in the Hi state, the Hi level signal should be kept necessary, and preferably if Gn has an off state , Dn can also have a slight off state.
觸控位置偵測器70經由子信號線路37施用監控電壓，來自子信號線路37的信號Auxn係以一種方式提供使得若Gn係在Hi位準期間，則其應為Hi位準，或是其可以固定的Hi位準提供。在Hi位準，子信號Auxn經由Dn在手指25及導電墊50之間提供一種較充電電壓的13伏特低3伏特或更多的監控電壓。此處，3伏特為第二TFT44的臨界電壓。例如，若監控電壓為5伏特，其將是足夠的。The touch position detector 70 applies the monitor voltage via the sub-signal line 37, and the signal Auxn from the sub-signal line 37 is provided in such a manner that if the Gn is in the Hi level period, it should be the Hi level, or It can be provided by a fixed Hi level. At the Hi level, the sub-signal Auxn provides a monitored voltage of 13 volts lower than the 13 volts of the charging voltage between the finger 25 and the conductive pad 50 via Dn. Here, 3 volts is the threshold voltage of the second TFT 44. For example, if the monitored voltage is 5 volts, it will be sufficient.
通過第二信號線路34的波形，及藉由此得到觸控信號的方法將參考第16圖敘述。如同施用閘極信號G1及G2的情況，若施用閘極信號及經過監看時間，但是身體未接近，經由第二信號線路34所得到的信號Sn具有如圖所示的波形。此是因為身體未接近故電容未形成於導電墊50及身體之間。具體言之，當施用閘極信號G1時，第一TFT42電開啟，則施用於第二TFT44閘極端的電壓位準較經由子信號線路37施用於第二TFT44輸入端的電壓位準高，故第二TFT44亦電開啟。但是因為第二信號線路的線路阻抗及寄生電容器，如圖所示，所得到信號Sn具有在至Hi位準的上升區間及至Low位準的下降區間之曲線。如在第16圖所示，假設T1為從第一TFT42由G1關斷及監看時間開始之時間至第二TFT44的閘極電壓快速降低及所得到信號Sn下降至完全Low位準之時間的間隔，但是忽略在輸出信號Sn產生的時間延遲。The waveform of the second signal line 34 and the method by which the touch signal is obtained will be described with reference to FIG. As in the case of applying the gate signals G1 and G2, if the gate signal is applied and the monitoring time is passed, but the body is not close, the signal Sn obtained via the second signal line 34 has a waveform as shown. This is because the body is not close to the capacitor and is not formed between the conductive pad 50 and the body. Specifically, when the gate signal G1 is applied, the first TFT 42 is electrically turned on, and the voltage level applied to the gate terminal of the second TFT 44 is higher than the voltage level applied to the input terminal of the second TFT 44 via the sub-signal line 37. The second TFT44 is also electrically turned on. However, because of the line impedance of the second signal line and the parasitic capacitor, as shown, the obtained signal Sn has a curve in the rising interval to the Hi level and the falling interval to the Low level. As shown in Fig. 16, it is assumed that T1 is the time from when the first TFT 42 is turned off by G1 and the monitoring time to when the gate voltage of the second TFT 44 is rapidly lowered and the obtained signal Sn falls to the full Low level. Interval, but ignores the time delay produced by the output signal Sn.
若身體在任何時間接近在第14圖右下方的觸控室60，則電容器可在相對應觸控室60於導電墊50及身體手指25之間形成。如在第16圖所示，若觸控在當G3為Hi位準的間隔產生，一旦手指25近距離接近，則虛擬電容器形成，接著，如在第16圖所示，當Sn的波形在接觸產生的瞬間扭曲，充電電壓可在初始充電階段波動，但是充電會快速完成且Sn上升至Hi位準。If the body approaches the touch chamber 60 at the lower right of FIG. 14 at any time, a capacitor can be formed between the conductive pad 50 and the body finger 25 in the corresponding touch chamber 60. As shown in Fig. 16, if the touch is generated at an interval when G3 is Hi level, the virtual capacitor is formed once the finger 25 is close to each other, and then, as shown in Fig. 16, when the waveform of Sn is in contact The resulting momentary distortion, the charging voltage can fluctuate during the initial charging phase, but charging will complete quickly and Sn will rise to the Hi level.
若信號G3變為監看時間模式，亦即，G3為關斷的，在虛擬電容器中的經充電電壓被放出，且第二TFT44的閘極電壓緩慢降低，且第二TFT44的輸出波形顯示如S3波形所示的特徵性質，則，假設T2為Sn降低至低於50%的區間。If the signal G3 changes to the watch time mode, that is, G3 is off, the charged voltage in the dummy capacitor is discharged, and the gate voltage of the second TFT 44 is slowly lowered, and the output waveform of the second TFT 44 is displayed as For the characteristic properties shown by the S3 waveform, it is assumed that T2 is a range in which Sn is reduced to less than 50%.
參考第16圖，T1與T2差異極大，觸控位置偵測器70讀取自Gn關斷的時間至當自第二信號線路34的信號Sn下降的時間之間隔，或是其讀取在預定時間的下降電壓，則得到觸控信號。在此具體實施例中，當S3於閘極信號G3關斷後的監控時間得到，觸控信號為座標值‘D3,S3’。Referring to FIG. 16, T1 and T2 are extremely different, and the touch position detector 70 reads the time from when the Gn is turned off to when the signal Sn from the second signal line 34 falls, or is read at a predetermined time. When the voltage drops, the touch signal is obtained. In this embodiment, when S3 is obtained after the gate signal G3 is turned off, the touch signal is the coordinate value 'D3, S3'.
第16圖為得到觸控信號的一個實例，但是其他方式亦可得到觸控信號。例如，可藉由在相同時間開啟所有閘極信號Gn以誘發在身體及導電墊50之間的虛擬電容器的充電，接著施用順序信號至子信號線路37，並監看輸出波形。Figure 16 is an example of obtaining a touch signal, but other methods can also obtain a touch signal. For example, all of the gate signals Gn can be turned on at the same time to induce charging of the dummy capacitor between the body and the conductive pad 50, followed by applying a sequence signal to the sub-signal line 37, and monitoring the output waveform.
第14圖為一種具體實施例，其中觸控信號係由身體接近所產生的電容器而得到。假設的身體手指25接觸導電墊50。在此情況，會產生數pF的電容器，且觸控信號可由其得到。但是，若額外連接實際電容器於導電墊50，則藉由 身體接近所形成的虛擬電容器會進行電荷分享，故第二TFT44閘極的電壓位準會降低，或是充電時間會加長，所以，藉由身體接觸可得到更可靠的觸控信號。Figure 14 is a specific embodiment in which the touch signal is obtained by the body approaching the generated capacitor. The assumed body finger 25 contacts the conductive pad 50. In this case, a capacitor of several pF is generated, and the touch signal can be obtained therefrom. However, if the actual capacitor is additionally connected to the conductive pad 50, The body is close to the formed virtual capacitor for charge sharing, so the voltage level of the gate of the second TFT 44 is lowered, or the charging time is lengthened, so that a more reliable touch signal can be obtained by body contact.
第17及18圖顯示一種具體實施例，其中在身體接觸的情況可得到更可靠的觸控信號，但是，在身體不接觸的情況這些具體實施例亦可得到可靠的觸控信號。參考第17圖，除了第14圖具體實施例的結構之外，電容器54額外連接於第一TFT42輸出端與子信號線路37之間。在此具體實施例中，觸控位置偵測器70循序施用掃描脈衝至每一個閘極信號線路36，或是其可施用相同閘極信號至所有閘極信號線路36。在此具體實施例中，閘極信號Gn及用於監看的子信號Auxn不必要彼此伴隨且它們可獨立施用。但是，若在電容器54由Gn充電長時間後，會在電容器54產生自由放電，故可能無法監看。因此，子信號Auxn較佳為在電容器54由Gn充電後馬上施用。Figures 17 and 18 show a specific embodiment in which a more reliable touch signal can be obtained in the case of physical contact, but these embodiments can also obtain a reliable touch signal in the case where the body is not in contact. Referring to Fig. 17, in addition to the structure of the embodiment of Fig. 14, the capacitor 54 is additionally connected between the output of the first TFT 42 and the sub-signal line 37. In this embodiment, the touch position detector 70 sequentially applies scan pulses to each of the gate signal lines 36, or it can apply the same gate signal to all of the gate signal lines 36. In this particular embodiment, the gate signal Gn and the sub-signal Auxn for monitoring are not necessarily accompanied by each other and they can be applied independently. However, if the capacitor 54 is charged by Gn for a long time, the capacitor 54 is freely discharged, so that it may not be monitored. Therefore, the sub-signal Auxn is preferably applied immediately after the capacitor 54 is charged by Gn.
例如，Gn On電壓為15伏特。當施用Gn時，亦施用Dn並充電連接至第二TFT44閘極端的電容器54。Dn Hi位準電壓將開啟第二TFT44，且考慮Gn的情況下其較佳為10伏特。Dn在足夠時間期間供應以充電電容器54。For example, the Gn On voltage is 15 volts. When Gn is applied, Dn is also applied and charged to the capacitor 54 of the gate terminal of the second TFT 44. The Dn Hi level voltage will turn on the second TFT 44, which is preferably 10 volts considering Gn. Dn is supplied with a charging capacitor 54 for a sufficient period of time.
第二TFT44閘極端的電壓較輸入端Auxn的電壓高3伏特或更多，故第二TFT44總是在開啟狀態。若在施用子信號Auxn以監看的當時身體同時接觸右下方觸控室60，則儲存在電容器54的電荷會放出且移至由身體所形成的虛擬電容器54直到兩個電容器的電壓位準變為彼此相等。若電容器54的充電容量充分地小於由身體所形成的虛擬電容器之充電容量，上述電荷分享產生，且施用於第二 TFT44閘極端的電壓可能不會開啟第二TFT44或是相關於子信號Auxn的輸出信號Sn可降低，則其可被偵測且可得到觸控信號。在此具體實施例中所得到觸控信號為座標值D3,S3。The voltage at the gate terminal of the second TFT 44 is 3 volts or more higher than the voltage at the input terminal Auxn, so the second TFT 44 is always in an on state. If the body simultaneously contacts the lower right touch chamber 60 while the sub-signal Auxn is being administered, the charge stored in the capacitor 54 is discharged and moved to the virtual capacitor 54 formed by the body until the voltage levels of the two capacitors become Equal to each other. If the charging capacity of the capacitor 54 is sufficiently smaller than the charging capacity of the virtual capacitor formed by the body, the above-described charge sharing is generated and applied to the second The voltage at the gate terminal of the TFT 44 may not turn on the second TFT 44 or the output signal Sn associated with the sub-signal Auxn may be lowered, and it may be detected and a touch signal may be obtained. The touch signals obtained in this embodiment are coordinate values D3, S3.
參考第18圖，子信號線路37包含第一子信號線路37a及第二子信號線路37b，且電容器54的其中一端係連接至第一子信號線路37a及第二TFT44輸入端係連接至第二子信號線路37b。除了用於監看的子信號及監控該狀態的子信號為分開的以外，此具體實施例與第17圖相同。子信號Aux1-n係施用於第一子信號線路37a以用於監看，而子信號Aux2-n係施用於第二子信號線路37b以用於監控。Referring to FIG. 18, the sub-signal line 37 includes a first sub-signal line 37a and a second sub-signal line 37b, and one end of the capacitor 54 is connected to the first sub-signal line 37a and the second TFT 44 is connected to the second end. Sub-signal line 37b. This embodiment is identical to Fig. 17 except that the sub-signals for monitoring and the sub-signals for monitoring the state are separate. The sub-signals Aux1-n are applied to the first sub-signal line 37a for monitoring, and the sub-signals Aux2-n are applied to the second sub-signal line 37b for monitoring.
在此具體實施例中，Gn On電壓為18伏特。Dn Hi位準電壓將開啟第二TFT44，及適當為12伏特。監看用的子信號Aux1-n在低位準可為-18伏特及Hi位準可為0伏特。例如，當子信號Aux1-n為低位準且電容器54已充電，則第二TFT44的閘極電壓為-6伏特，且對較高電壓的第二子信號線路37b，第二TFT44未電連接。而當Aux1-n為Hi位準(零伏特)，Dn Hi位準電壓為12伏特，且對較之低3伏特的子信號Aux2-n，確定第二TFT 44將電連接。較佳為，子信號Aux2-n與子信號Aux1-n同步，且Aux2-n的Hi位準電壓及Low位準電壓較佳為等於Aux1-n的Hi位準電壓及Low位準電壓。In this embodiment, the Gn On voltage is 18 volts. The Dn Hi level voltage will turn on the second TFT 44, and suitably 12 volts. The sub-signal Aux1-n for monitoring can be -18 volts at the low level and 0 volts at the Hi level. For example, when the sub-signal Aux1-n is low and the capacitor 54 is charged, the gate voltage of the second TFT 44 is -6 volts, and for the second sub-signal line 37b of higher voltage, the second TFT 44 is not electrically connected. When Aux1-n is Hi level (zero volt), the Dn Hi level voltage is 12 volts, and for the sub-signal Aux2-n which is 3 volts lower, it is determined that the second TFT 44 is electrically connected. Preferably, the sub-signal Aux2-n is synchronized with the sub-signal Aux1-n, and the Hi level voltage and the Low level voltage of Aux2-n are preferably equal to the Hi level voltage and the Low level voltage of Aux1-n.
第17及18圖的具體實施例可選擇各種電容的電容器54，使得在電荷分享後施用於第二TFT44閘極的電壓被調整，其為當接觸時Sn信號波的向下傾斜角度的決定因素。亦即，藉由加入電容器54，擴充了每一個信號的電壓位準 的選擇範圍，且Sn信號的向下傾斜可更平緩，故更確信可得到觸控信號。The specific embodiments of Figures 17 and 18 can select capacitors 54 of various capacitances such that the voltage applied to the gate of the second TFT 44 after charge sharing is adjusted, which is a determining factor for the downward tilt angle of the Sn signal wave upon contact. . That is, by adding a capacitor 54, the voltage level of each signal is expanded. The range of selection, and the downward tilt of the Sn signal can be more gradual, so it is more sure that the touch signal can be obtained.
如上文所敘述，第12至18圖的具體實施例顯示藉由使用形成於身體及導電墊50之間的電容器來偵測觸控位置之方法，且這些具體實施例的導電墊50不需要露出。所以透明絕緣層可塗佈於基板30的一側以保護觸控室60的元件(未示出)。此種透明絕緣層的塗佈方法較導電層的塗佈方法容易，且可增強面板的耐久性。藉由透明絕緣層，身體可更靠近地接近導電墊50，當虛擬電容器由身體接近而形成時，其會藉由減少距離值(其構成電容方程式的分母)而增加虛擬電容。As described above, the specific embodiments of FIGS. 12 to 18 show a method of detecting a touch position by using a capacitor formed between the body and the conductive pad 50, and the conductive pads 50 of these embodiments are not required to be exposed. . Therefore, a transparent insulating layer can be coated on one side of the substrate 30 to protect elements (not shown) of the touch chamber 60. The coating method of such a transparent insulating layer is easier than the coating method of the conductive layer, and the durability of the panel can be enhanced. With the transparent insulating layer, the body can approach the conductive pad 50 closer, and when the virtual capacitor is formed by the body approaching, it increases the virtual capacitance by reducing the distance value which constitutes the denominator of the capacitance equation.
上述具體實施例係敘述藉由身體接觸或接近得到觸控信號，但是顯然亦可使用其他方式，例如高電壓輻射的觸控筆等接觸或接近觸控面板以得到觸控信號。The above specific embodiments describe that the touch signal is obtained by physical contact or proximity, but it is obvious that other methods, such as a high-voltage radiation stylus or the like, may be used to contact or approach the touch panel to obtain a touch signal.
本發明已相關於較佳具體實施例敘述，然而，本發明並不限於上述具體實施例，及普通知曉該技藝者可進行各種修改及變化且不偏離由申請專利範圍所定義的本發明精神。The present invention has been described in connection with the preferred embodiments thereof. However, the invention is not limited to the specific embodiments described above, and various modifications and changes can be made without departing from the scope of the invention as defined by the appended claims.
1、20‧‧‧顯示裝置1, 20‧‧‧ display devices
3‧‧‧第一基板3‧‧‧First substrate
5‧‧‧第二基板5‧‧‧second substrate
7、9‧‧‧透明導電層7, 9‧‧‧ transparent conductive layer
11‧‧‧電阻點11‧‧‧Resistance point
13‧‧‧轉換器13‧‧‧ converter
17‧‧‧筆17‧‧‧ pen
25‧‧‧手指25‧‧‧ fingers
30‧‧‧基板30‧‧‧Substrate
D1、D2、D3‧‧‧時間分割位置偵測信號D1, D2, D3‧‧‧ time division position detection signal
32‧‧‧複數第一信號線路32‧‧‧ plural first signal line
34‧‧‧複數第二信號線路34‧‧‧ plural second signal line
36‧‧‧閘極信號線路36‧‧‧gate signal line
37‧‧‧子信號線路37‧‧‧Sub Signal Line
37a‧‧‧第一子信號線路37a‧‧‧First sub-signal line
37b‧‧‧第二子信號線路37b‧‧‧Second sub-signal line
40‧‧‧切換裝置40‧‧‧Switching device
42‧‧‧第一切換裝置42‧‧‧First switching device
44‧‧‧第二切換裝置44‧‧‧Second switching device
50‧‧‧導電墊50‧‧‧Electrical mat
50a‧‧‧第一導電墊50a‧‧‧First conductive pad
50b‧‧‧第二導電墊50b‧‧‧Second conductive pad
51‧‧‧凹處51‧‧‧ recess
53‧‧‧凸出53‧‧‧ protruding
54‧‧‧電容器54‧‧‧ capacitor
56‧‧‧閘極端56‧‧‧ gate extreme
57‧‧‧源極端57‧‧‧ source extreme
58‧‧‧汲極端58‧‧‧汲 Extreme
59‧‧‧接點59‧‧‧Contacts
60‧‧‧複數觸控室60‧‧‧Multiple touch room
70‧‧‧觸控位置偵測器70‧‧‧Touch position detector
71‧‧‧驅動ICs71‧‧‧Drive ICs
72‧‧‧時脈控制器72‧‧‧clock controller
73‧‧‧信號處理器73‧‧‧Signal Processor
74‧‧‧記憶體74‧‧‧ memory
90‧‧‧擴散片90‧‧‧Diffuser
G1、G2、G3‧‧‧閘極信號G1, G2, G3‧‧‧ gate signal
Aux1-n、Aux2-n、Auxn‧‧‧子信號Aux1-n, Aux2-n, Auxn‧‧‧ sub-signals
Dn‧‧‧位置偵測信號Dn‧‧‧ position detection signal
本發明上述及其他目的及優點可由敘述較佳具體實施例並參考相關圖式而變得更清楚，圖式中：第1圖為習知電阻型觸控面板的斷面圖；第2圖為根據本發明具體實施例觸控面板的立體分解透視圖；第3圖為根據本發明具體實施例觸控面板的示意圖；第4圖為具擴散片的一個具體實施例的立體分解透視 圖；第5圖為根據本發明系統的方塊圖；第6圖為根據本發明具體實施例的脈波圖；第7圖為根據本發明記憶體的示意圖；第8圖為使用本體靜電的具體實施例的方塊圖；第9圖為使用本體靜電的另一具體實施例的方塊圖；第10圖為使用本體導電度的具體實施例的方塊圖；第11圖為第9圖具體實施例的導電墊之配置圖；第12圖為使用本體靜電電容的具體實施例的示意圖；第13圖為使用本體靜電電容的具體實施例的方塊圖；第14圖為使用本體靜電電容的另一具體實施例的方塊圖；第15圖為第14圖具體實施例的觸控室單元之配置圖；第16圖為第14圖具體實施例的脈波圖；第17圖為使用本體靜電電容的另一具體實施例的方塊圖；及第18圖為使用本體靜電電容的另一具體實施例的方塊圖。The above and other objects and advantages of the present invention will become more apparent from the detailed description of the preferred embodiments of the invention. FIG. 1 is a cross-sectional view of a conventional resistive touch panel; 3 is an exploded perspective view of a touch panel according to an embodiment of the present invention; FIG. 3 is a schematic view of a touch panel according to an embodiment of the present invention; and FIG. 4 is a perspective exploded perspective view of a specific embodiment with a diffusion sheet. Figure 5 is a block diagram of a system in accordance with the present invention; Figure 6 is a pulse diagram in accordance with an embodiment of the present invention; Figure 7 is a schematic diagram of a memory according to the present invention; and Figure 8 is a diagram showing the use of bulk static electricity. FIG. 9 is a block diagram of another embodiment using bulk static electricity; FIG. 10 is a block diagram of a specific embodiment using bulk conductivity; and FIG. 11 is a view of a specific embodiment of FIG. FIG. 12 is a block diagram showing a specific embodiment using a bulk electrostatic capacitance; FIG. 13 is a block diagram showing a specific embodiment using a bulk electrostatic capacitance; and FIG. 14 is another specific implementation using a bulk electrostatic capacitance. FIG. 15 is a configuration diagram of a touch chamber unit of a specific embodiment of FIG. 14; FIG. 16 is a pulse wave diagram of a specific embodiment of FIG. 14; and FIG. 17 is another specific example of using a bulk electrostatic capacitance. A block diagram of an embodiment; and an 18th block is a block diagram of another embodiment using bulk electrostatic capacitance.
D1、D2、D3‧‧‧時間分割位置偵測信號D1, D2, D3‧‧‧ time division position detection signal
30‧‧‧基板30‧‧‧Substrate
32‧‧‧複數第一信號線路32‧‧‧ plural first signal line
34‧‧‧複數第二信號線路34‧‧‧ plural second signal line
40‧‧‧切換裝置40‧‧‧Switching device
50‧‧‧導電墊50‧‧‧Electrical mat
60‧‧‧複數觸控室60‧‧‧Multiple touch room
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| JP5250135B1 (en) * | 2012-04-26 | 2013-07-31 | シャープ株式会社 | Touch panel system, electronic information device, and indicator position detection method |
| TWI489335B (en) * | 2012-08-09 | 2015-06-21 | Wistron Corp | Conductive substrate and touch panel |
| JP6980567B2 (en) * | 2018-03-07 | 2021-12-15 | 株式会社ジャパンディスプレイ | Detection device |
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| US20070146282A1 (en) * | 2005-12-28 | 2007-06-28 | Lg. Philips Lcd Co., Ltd. | Liquid crystal device displaying and sensing images and method of driving the same |
| WO2008126768A1 (en) * | 2007-04-09 | 2008-10-23 | Sharp Kabushiki Kaisha | Display device |
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| NZ554621A (en) * | 2004-09-24 | 2011-01-28 | Touchsensor Tech Llc | Contactless multiposition switches using capacitive touch sensors |
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| CN1916712A (en) * | 2006-09-14 | 2007-02-21 | 友达光电股份有限公司 | Touch controlled type liquid crystal display |
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