TW201122946A - In-cell touch panel - Google Patents

Abstract

An in-cell touch panel includes a first substrate, a second substrate and a plurality of sensing regions formed between the first substrate and the second substrate. Each sensing region includes a first region, a second region and a plurality of supporting structures distributed in the first region and the second region to maintain a distance between the first substrate and the second substrate; wherein a distribution density of the supporting structure in the first region is larger than that in the second region.

Description

201122946

[Technical Field] The present invention relates to a touch device, and more particularly to an in-cell touch panel having an uneven support structure and a sensing structure distribution. [Prior Art]

With the popularization of mobile devices, human-machine interface devices are also widely used in mobile devices such as mobile assistants (PDAs), mobile phones, and notebook computers to make their operations more user-friendly; Play an important role in the humanized operation. At present, touch screens can mainly use external or in-cell touch panels. The external touch panel generally includes four types of resistance type, capacitance type, infrared type and sound wave type, and is mainly used for the surface of the display device to set an additional touch surface. However, the additional control panel increases the overall thickness of the touch screen and reduces the light transmittance of the display device to affect its brightness performance. Therefore, the industry has proposed an internal touch panel to solve this problem. The internal I-type touch panel is a panel that includes both a touch function and a display function. Referring to Figure 1, _ , , shows a conventional in-line touch: partial cutaway view. The in-cell touch panel 90 includes a first and a second substrate 92. The first substrate 91 is hooked == the branch structure 911 and the sensing structure-; in the Γ, the sensing (4) 2 surface is formed with a conductive film 912

01441-TW/A09054-TW 201122946 The second substrate 92 is uniformly formed with a plurality of first stacked milk and a second stacked structure 922; wherein the second stacked structure 922 is formed with a conductive film 9221 on the surface. The in-cell touch panel: a support structure 911 is aligned and abuts against a first abundance structure 921 to maintain a distance between the first substrate 91 and the second substrate %—a sensing structure 912 The pair is located in a second stack structure 922; thereby, when an external force is applied to the outer surface s of the first substrate 91, the conductive thin surface of the sensing structure 912 is electrically connected to the surface of the second stack structure 922 The conductive film 9221' is used to sense the contact position of the external force. However, since the touch surface of the in-cell touch panel is located on a glass (ie, the first substrate 91), the touch surface of the external touch panel, such as a resistive touch panel, is generally a polyester film (ρΕτ film). Therefore, the external force required to touch an in-cell touch panel is larger than that of the touch two external touch panel, thereby reducing the touch sensitivity of the in-cell touch panel. In view of this, it is necessary to propose an in-cell touch panel with a low pressing load to increase its touch sensitivity. SUMMARY OF THE INVENTION The present invention provides a touch panel in which a touch area of each sensing area is configured with a lower density support structure to reduce the pressing load of the touch area and increase touch sensitivity. The present invention further provides a touch panel in which the sensing structure in each of the sensed 01141-TW / A09054-TW 4 201122946 regions is disposed only in the central portion and is not disposed at the periphery to avoid simultaneous pressing to the two sensing regions. Causes a malfunction.

The present invention provides an in-cell touch panel including a first substrate, a second substrate, and a plurality of sensing regions formed between the first substrate and the first substrate. Each of the sensing regions includes a first region, a second region, and a plurality of support structures disposed in the first region and the second region to maintain a distance between the first substrate and the second substrate, wherein the first region The distribution density of the support structure is greater than the distribution density of the support structure in the second region. The present invention further provides an in-cell touch panel, comprising a plurality of sensing regions, each sensing region comprising a first region and a second region, wherein the first region has a first pressing load, which is set by The distribution density of the plurality of support structures in the first region is determined, wherein the second region of the S-hai has a second pressing load, which is determined by the distribution density of the support structure disposed in the second region; wherein The pressing load is less than the first pressing load. The invention further provides an internal touch panel comprising a first substrate, a first substrate and a plurality of sensing regions arranged between the first substrate and the second substrate. Each of the sensing regions includes a third region, a fourth region, and a plurality of sensing structures to sense a contact pressure of an external force, wherein the sensing structures are formed only in the third region and are not formed in the fourth region . In the in-cell touch panel of the present invention, the support structure is disposed on one of the support pads of the first substrate and the abutment of one of the stacked structures of the second substrate by 01441-TW / A09054-TW 5 201122946 form. The sensing structure is formed by a sensing gap disposed on one of the first substrate and a stacked structure disposed on the second substrate. In the present invention, since the distribution density of the support structure in the first region is greater than the distribution density of the support structure in the second region, the pressing load of the second region can be effectively reduced; in addition, since the sensing structures are only set In the central part of each sensing area, ' ^ avoids simultaneous pressing to the two sensing areas and causing malfunction. [Embodiment] The above and other objects, features, and advantages of the present invention will become more apparent. In the description of the present invention, the same components are denoted by the same reference numerals. Moreover, only some of the components are shown in the various figures of the present invention and components that are not directly related to the description of the invention are omitted. Please refer to the second riding*, which shows a top view of the touch panel according to an embodiment of the present invention. The touch panel 1 is an in-cell touch panel, that is, the touch panel 1 has both a touch function and a display function. The touch panel 1 includes a first substrate u and a second plate 12 facing the first substrate U'. The first substrate and the substrate 12 are interposed with a liquid crystal layer (not shown). The first board 11 and the second board 12 can be formed, for example, by a material such as glass or quartz, 01041-TW / A09054-TW c 201122946; the first substrate 11 is, for example, a color filter substrate or a glass. The touch panel 1 includes a plurality of sensing regions 10 formed between the first substrate 11 and the second substrate 12 in an array. For example, FIG. 2a includes 32×30 sensing regions 1〇, wherein the number of the sensing regions 10 is It can be determined according to the panel size of the touch panel 1 and the required resolution, and is not limited to those disclosed in FIG. 2a.

Referring to Figure 2b, a partial enlarged view of one of the sensing regions 10 in Figure 2a is shown. A sensing area 1 〇 contains a plurality of pixel regions 100~1 〇〇'', such as, but not limited to, 32x20 pixel regions. Each pixel region includes a plurality of data lines 13, a gate line 14, a horizontal axis read line 15, a vertical axis read line 16, and a plurality of color sub-smectins for color mixing during display, such as red sub-pictures. , green scorpion and blue scorpion, but not limited to this. The data line 13 is used to transmit the gray scale value to be displayed in a halogen region to the halogen region through the -switching element. The gate line 14 serves as a scan line of the touch panel 1 to drive a column of pixels. The horizontal axis reading line 15 and the vertical axis reading line 16 take a signal "when an external force touches the pixel area" and determine the (four) point coordinates of the external force. The pixel region may comprise or may not comprise at least one support structure and/or may comprise at least one sense structure or a sense structure. For example, a first halogen region 1 - 色 昼 、 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - , the mouth structure 17 and the dice-colored element contains a horizontal light

01441-TW/A09054-TW 201122946 Sensing structure 18 and/or a longitudinal axis sensing structure 18'. a second pixel. In the region 100', the support structure is not included and the blue sub-tendin includes a horizontal axis sensing structure 18 and/or a vertical axis sensing structure 18, and a third pixel region 100 The sensing structure is not included and the green scorpion contains a support structure 17. A fourth pixel region 100" does not include any supporting structure and sensing structure. It can be understood that the latitude 17 of the building and the sensing structure 18 can be formed in other colors, not limited to The present invention discloses that the support structure 17 and the sensing structure 18 are distributed in a sensing area 10 in a predetermined manner to achieve the effect of reducing the pressing load and avoiding malfunctions. 2c is a partial cross-sectional view taken along line 2c-2V of Fig. 2b, wherein a member not directly related to the description of the invention of the present invention, such as data line 13, is omitted from Fig. 2c. The area 1 〇 includes a first substrate 丨丨, a second base 0 plate 12, a plurality of support structures 17 and a plurality of sensing structures 18. The support structure 17 includes an upper support structure 171 and a lower support structure 172 abutting each other to maintain The distance between the first substrate u and the second substrate 12. In one embodiment, the upper support structure 171 is formed by stacking a color filter 1711, a support spacer 1712 and a transparent electrode 1713. Where the color filter 1711 To below the surface on the first substrate 11 and the supporting spacer 1712

01441-TW/A09054-TW 8 201122946 is formed on the color filter nil; the transparent electrode 1713 is formed on the surface of the color filter 1711 and the support spacer 1712, wherein each layer of the upper support structure 171 The manner of formation can be achieved by conventional means. The transparent electrode 1713 can be a part of a common electrode of the touch panel 1. The lower structure 172 is stacked by a plurality of layers of materials, for example, a first metal layer 1721, an insulating layer 1722, a doped layer or a second metal layer 23 and a protective layer. Formed by 1724. It must be understood that the building structure 17 may also be formed by other stacking sequences or materials and is not limited to those disclosed in Figure 2c. In one embodiment, the sensing structure 18 includes an upper sensing structure 181 and a lower sensing structure 182 aligned and spaced apart from the sensing structure 181 - the sensing distance, wherein the sensing distance can be based on the touch

The sensitivity of the touch of 4 is determined. The upper sensing structure j g includes a sensing gap 1811 formed on the first substrate n. The transparent electrode 1812 is formed on the surface of the sensing spacer 1811. The transparent electrode 1812 can be the touch panel! A total: Part of it and the transparent electrode i7i3 simultaneously shaped her μ ΐ ί11. The lower sensing structure 182 is formed by a multi-layer material, a stacking structure, for example, a gold-made 1821, an insulating layer 1822, and a transparent thunder-polar private edge electrode 1823. Simultaneously with the insulating layer 1722, the first transparent electrode _ is in contact with the metal layer 18. Wrong, when the external force touches the value of the first substrate U

01441-TW / A09054-TW 201122946 The transparent electrode 1812 can be in electrical contact with the transparent electrode 1823 to transmit a sensing signal to the horizontal axis read line 15 and/or the vertical axis read line 16. It must be understood that the sensing structure 18

It may also be formed by other stacking sequences or materials, and is not limited to those disclosed in FIG. 2C. Further, the sensing region 1 of the present invention may additionally form a black matrix 19 on the inner side surface of the first substrate u, as shown in Fig. 2C. 4, which is shown in Fig. 3a, which shows a schematic diagram of a sensing region 10 according to a first embodiment of the present invention, wherein the sensing region 10 includes, for example, 32x20 pixel regions 1〇〇1 to 1〇〇. Figure 3a = The area marked with diagonal lines indicates the area of the pixel provided with the support structure 17, such as the pixel area 1 (9) or 1 〇〇 " (as shown in Figure 2b), 2 the area not marked with a slash indicates that it is not set A pixel region having a support structure 17 such as a pixel region 100, or 100, " (as in Fig. 2b =) In this embodiment, each sensing region i 0 includes a first region. 101 and - a second region 102, wherein the distribution density of the support structure 17 in the first region 101 is higher and the distribution density of the support structure 17 in the second region 102 is lower, and the first region 101 is surrounded by: - the periphery of area 102. Thereby, when the user touches the first region 1〇2, less external force can be applied, so the first region 1G2 has a lower pressing load. Here, the distribution is the ratio of the total cross-sectional area of the branch structure (" m /mm ) or the number of the branch structures 17 to the number of pixel areas per square millimeter. Support structure of area 101

01441-TW / A09054-TW 201122946 17 The distribution density is, for example, greater than or equal to 3〇〇#m2/mm2, and the distribution density of the support structure 17 of the second region 102 is, for example, less than 3〇〇" m2/mm2. It can be understood that the first The distribution density of the support structure 17 in a region 1〇1 and the second region 102 can be designed according to the actual required pressing load. Preferably, the first region 1〇1 and the support structure 17 in the second region 102 The average distribution density is greater than 200 #m2/mm2 to effectively support the first substrate u and avoid the Mura effect. Referring to FIG. 3b, it shows a sensing region 1 according to a second embodiment of the present invention. In this embodiment, in order to increase the area of the low-pressing load region in the sensing region 10, the first region 1〇1 of the support structure 17 having a higher distribution density is disposed in the sensing region 10 In the first region 1〇1, the distribution density of the support structure 17 is, for example, greater than or equal to 3〇〇 in m2/mm2; in the second region 102, the distribution density of the support structure 17 is, for example, less than 300"m2/ Mm2. It must be understood that the first area is not one To form a rectangular region, other specific shapes or non-specific shapes may be formed. Referring to Figure 3c, there is shown a schematic diagram of a sensing region 10 according to a third embodiment of the present invention. In Figure 3c, The area of the slashed line indicates that the sensing structure 18 and/or 18 is provided, such as the primed area 100 or 100' (as shown in Figure 2b), and the area not marked with a slashed line indicates The sensing junction is not provided 01441-TW/A09054-TW 11 201122946 Γ〇〇:, 8 (= or 18, the pixel region, for example, the pixel region 100〃 or the 2b diagram). In this embodiment, In order to prevent a user from simultaneously touching two adjacent sensing regions 10 while touching, the sensing region 4 10 is divided into a third region 03 and a fourth region 104, wherein the The sensing structures 18 and/or 18 are distributed in the fourth region 104, and the sensing structures 18 and/or 18 have a distribution density of, for example, 63 WW or more; and the third region 1〇3 is not provided with sensing at all. Structure 18 and / or 18 / one ^

In the embodiment, the fourth region 104 can be formed, but is not limited thereto. A, please refer to Fig. 3d, which shows a schematic diagram of a sensing region 10 according to a fourth embodiment of the present invention. In this embodiment, the third embodiment is implemented in combination with the first or second embodiment, that is, the first region 103 can overlap with the first region 101 or 1〇1, and the fourth region ισ4 can be associated with the first region. The two regions 102 or 1〇2 coincide, for example, in the 3d figure, the third region 103 is equal to the first region 1 and the fourth region 1G4 is equal to the second region 1G2. Therefore, the actual example can simultaneously reduce the pressing load of the actual touch area and the effect of pressing to the two sensing areas when the = is avoided. 5 Refer to Figure 4, which shows another schematic diagram of an in-cell touch panel. The touch panel 1 ′ includes a display area 〇8 and a plurality of button areas BA, wherein the sensing areas 1 〇 are only distributed in the button area BA and are not disposed on the touch panel 1 , and the area 01414-TW/ A09054-TW 12 201122946 • Domain. Therefore, the above embodiments of the present invention are only implemented in the key areas BA, thereby reducing the pressing load of the button area bA and/or avoiding simultaneous pressing to the two sensing areas to cause malfunction. In one embodiment, a button area BA may include only one sensing area 1〇. It should be understood that the distribution structure of the support structure 17 and the sensing structure 18 and/or 18' of the present invention can also be applied to the in-cell touch panel of other structures. FIG. 2b is merely illustrative and not used. The invention is defined by . As mentioned above, the conventional in-cell touch panel has a lower touch sensitivity than a plug-in touch panel that requires a larger pressing load. The invention provides a support structure (3a and 31?) having uneven distribution density to reduce the pressing load of the actual touch area, and the sensing structure is only disposed in the central area of each sensing area (Fig. 3c ) to avoid simultaneous pressing of the two sensing areas to cause φ malfunction. The present invention has been disclosed in the foregoing embodiments, and is not intended to limit the present invention. Any of the ordinary skill in the art to which the invention pertains can be modified and modified without departing from the spirit and scope of the invention. . Therefore, the scope of the invention is defined by the scope of the appended claims.

01441-TW / A09054-TW 13 201122946 [Simple description of the drawing] Fig. 1 shows a partial cross-sectional view of a conventional touch panel. Figure 2a shows a top view of a touch panel in accordance with an embodiment of the present invention, wherein the touch panel includes a plurality of sensing regions. Figure 2b shows a partial enlarged view of one of the sensing regions of Figure 2a. Figure 2c shows a cross-sectional view taken along line 2c-2c' in Figure 2b. Fig. 3a is a view showing the distribution of the support structure of the first embodiment of the present invention. Fig. 3b is a view showing the distribution of the support structure of the second embodiment of the present invention. Fig. 3c is a view showing the distribution of the sensing structure of the third embodiment of the present invention. Fig. 3d is a view showing the distribution of the support structure and the sensing structure of the fourth embodiment of the present invention. 4 is a top plan view of a touch panel according to another embodiment of the present invention, wherein the sensing area is only distributed in a button area of the touch panel. [Main component symbol description] 1 ' V touch panel 11 First substrate 13 Data line 15 Horizontal axis read line 17 Support structure 1711 Color filter 1713 Transparent electrode

01441-TW/A09054-TW 10 Sensing area 12 Second substrate 14 Gate line 16 Vertical axis reading line 171 Upper support structure 1712 Support spacer 172 Lower support structure 14 201122946 1721 First metal layer 1722 Insulation layer 1723 Layer 1724 protective layer 18, 18, sensing structure 181 on sensing structure 1811 sensing gap 1812 transparent electrode 182 lower sensing structure 1821 metal layer 1822 insulating layer 1823 transparent electrode 19 black matrix 100-100m halogen region 101, 101 'First region 102, 102' Second region 103 Third region 104 Fourth region DA Display region BA Button region 90 In-cell touch panel 91 Second substrate 911 Support structure 912 Sensing structure 9121 Conductive film S First substrate Outer surface 92 second substrate 921 first stacked structure 922 second stacked structure 9221 conductive film 01441 - TW / A09054-TW 15

Claims (1)

201122946 VII. Patent application scope: 1. An in-cell touch panel comprising: a first substrate; a second substrate 'facing the first substrate; and a plurality of sensing regions formed on the first substrate and the first The first mother-sensing region includes a first region, a second region, and a plurality of support structures distributed in the first region and the second region to maintain a distance between the first substrate and the second substrate; Wherein the distribution density of the support structure in the first region is greater than the distribution density of the structure of the branch in the second region. 2. The in-cell touch panel of claim 1, wherein the first area surrounds the periphery of the second area. 3. The in-cell touch panel of claim 1, wherein the first area is located at four corners of the sensing area. 4. The in-cell touch panel of claim 1, wherein the first substrate is a color filter substrate or a glass. 5. The in-cell touch panel of claim 1, wherein the support structure is formed by a support structure formed on one of the first substrate and a stack formed on the second substrate. 6. The in-cell touch panel of claim 1, wherein each of the sensing regions further comprises a plurality of sensing structures, wherein the sensing structures are disposed only in the first region and not in the second region. 01441-TW/A09054-TW 16 201122946 7. According to the scope of claim 6 and 々a, the smart touch panel, the 哕 哕 sensing structure is formed in the first base, μ ^ ^ One of the soil pull sensing sub-gap and the (four)-substrate-stacking structure are formed by mutual alignment. 8. The in-cell touch panel according to item 7 of the patent application scope, wherein the sensing gap and the surface of the stacking structure are respectively formed with a transparent pole. 9. The in-cell touch panel of claim 6 wherein the sensing structures are disposed only in a central portion of the sensing region and form a "rectangular region. 10. The in-cell touch panel of claim 1, wherein the average density of the support structures in the first region and the second region is greater than or equal to 200 square micrometers per square millimeter. 11. The root, the in-cell touch panel of the patent scope 帛i, wherein the sensing area such as 5 hai is formed only in a part of the in-cell touch panel. 12. The in-cell touch panel comprises: a plurality of sensing regions, each sensing region comprising a first region and a first region; wherein the first region has a first pressing load, which is The distribution density of the plurality of support structures disposed in the first region is determined; wherein the second region has a second pressing load determined by a distribution density of the support structure disposed in the second region; wherein the second pressing load It is less than the first pressing load. 01441-TW / A09054-TW 17 201122946 13. The in-cell touch panel of claim 12, wherein the first area of the 5H surrounds the periphery of the second area. 14. The in-cell touch panel of claim 12, wherein the first area is located at four corners of the sensing area. The in-cell touch panel of claim 12, wherein each of the sensing regions further comprises a plurality of sensing structures, wherein the sensing structures are disposed only in the first region and are not disposed in the first Two areas. 16. The in-cell touch panel of claim 15, wherein the sensing structures are disposed only in a central portion of the sensing region and form a rectangular region. 17. The in-cell touch panel of claim 12, wherein the sensing regions are formed only in a portion of the in-cell touch panel. 18. An in-cell touch panel, comprising: a first substrate; a second substrate facing the first substrate; and an array of the plurality of sensing regions being formed between the first substrate and the second substrate Each of the sensing regions includes a third region, a fourth region, and a plurality of sensing structures to sense a contact pressure of an external force, wherein the sensing structures are formed only in the third region and are not formed in the fourth region region. 19. The in-cell touch panel according to item a of the patent application, wherein the third area of the shai is located at a central portion of the sensing area. 20. The in-cell touch panel of claim 18, wherein the sensing structure is formed by one of the first substrate sensing gaps 01441 - TWIA09054-TW \ft 201122946 and formed in the second One of the stacking structures of the substrate is formed by aligning each other. The in-cell touch panel of claim 20, wherein the sensing gap and the surface of the stacked structure are respectively formed with an electrode. Bright 22. The in-cell touch panel of claim 18, wherein the first substrate is a color filter substrate or a glass. 23. The in-cell touch panel of claim 18, wherein each of the sensing regions further comprises a plurality of branch structures - the degrees are respectively distributed in the third region and the ton region; Ju. 24. The root shot is in the embedded range of the 23rd item of the patent scope. The fourth area is located at the four corners of the sensing area. - 25·=二:: In-line touch panel of item 23 of the profit range The I. structure is formed by the support spacer formed on the second and the second A stacking structure of one of the substrates is formed by abutting. 01441-TW / A09054-TW