CN111414101A

CN111414101A - Touch screen and spliced display device

Info

Publication number: CN111414101A
Application number: CN202010376361.1A
Authority: CN
Inventors: 李漫铁; 余亮; 屠猛龙
Original assignee: Ledman Optoelectronic Co Ltd
Current assignee: Ledman Optoelectronic Co Ltd
Priority date: 2020-05-07
Filing date: 2020-05-07
Publication date: 2020-07-14

Abstract

The invention relates to a touch screen and a splicing type display device. The touch screen includes: a unit plate; the touch control piece is electrically connected to the unit plate and comprises a first touch control strip and a second touch control strip, and a plurality of first touch control strips and a plurality of second touch control strips are arranged in a mesh-shaped interweaving manner and form a plurality of grids; the pixel units are electrically connected to the unit plate and arranged in the grids; and the touch chip is electrically connected to the unit plate, the first touch strip and the second touch strip. The spliced display device comprises a touch screen, and a plurality of touch screens are electrically connected and spliced to form the spliced display device. The touch screen comprises a plurality of small touch screens, wherein the small touch screens are arranged in a mesh-shaped interweaving mode, the small touch screens are arranged on the two sides of the touch screen in a meshed interweaving mode, the small touch screens are.

Description

Touch screen and spliced display device

Technical Field

The invention relates to the technical field of display, in particular to a touch screen and a splicing type display device.

Background

With the development of mobile terminals such as computers and mobile phones as information sources, system designers increasingly feel that the touch screen has great superiority due to the advantages of easy use, firmness and durability, high response speed, space saving and the like of the touch screen.

With the success of capacitive touch screens, human-computer interaction has not been able to leave the touch function of the display. In order to achieve the touch of the display more conveniently and at lower cost, the industry is always seeking the best integration scheme of display and touch, and as the capacitive touch screen technology is developed more and more mature and has limited development space, the optical touch screen technology gradually becomes a hot spot in technical research.

When a traditional touch screen is produced, if the traditional touch screen meets the production requirement of cutting a large touch screen into a plurality of small touch screens, the original touch function is often disabled after cutting. Therefore, how to cut a large touch screen into a plurality of small touch screens and still maintain the touch function thereof is an urgent technical problem to be solved in the field.

Disclosure of Invention

In view of the above, it is necessary to provide a touch panel and a tiled display device.

A touch screen, comprising:

a unit plate;

the touch control piece is electrically connected to the unit plate and comprises a first touch control strip and a second touch control strip, and a plurality of first touch control strips and a plurality of second touch control strips are arranged in a mesh-shaped interweaving manner and form a plurality of grids;

a pixel unit electrically connected to the unit board and disposed in the grid; and

and the touch chip is electrically connected with the unit plate, the first touch strip and the second touch strip.

In one embodiment, a group of the pixel units is arranged in each grid.

In one embodiment, the pixel unit comprises a red L ED element, a green L ED element and a blue L ED element, and the red L ED element, the green L ED element and the blue L ED element are arranged in an RGB stripe.

In one embodiment, the cell plate is provided with a display area and a non-display area, the display area is arranged in a matrix, the pixel units are arranged in the display area, and the first touch-control strips and the second touch-control strips are arranged in the non-display area in a mesh-like interlaced manner.

In one embodiment, the extending directions of the first touch bars are parallel to each other.

In one embodiment, the extending directions of the second touch bars are parallel to each other.

In one embodiment, the first touch bar and the second touch bar are both transparent touch bars.

In one embodiment, the grid is square, rectangular or diamond shaped.

The spliced display device comprises a touch screen, wherein the touch screen is electrically connected and spliced to form the spliced display device.

In one embodiment, the touch screens spliced into the tiled display device are different in size.

Has the advantages that: when in production, a larger touch screen can be cut into a plurality of small touch screens with different sizes as required, each small touch screen comprises a plurality of first touch strips and second touch strips which are in mesh interweaving arrangement, and because the touch function in the touch screen is realized through the first touch strips and the second touch strips which are in mesh interweaving arrangement, the complete touch function of each cut small touch screen can be realized without damaging the touch function of the touch screen.

Drawings

FIG. 1 is a schematic diagram of a touch screen in an embodiment of the invention;

FIG. 2 is a schematic diagram illustrating an embodiment of the present invention in which a single touch screen is cut into a plurality of small touch screens;

FIG. 3 is a schematic diagram illustrating a plurality of small touch screens spliced into a tiled display device according to an embodiment of the present invention.

Reference numeral 10, a first direction, 20, a second direction, 100, a cell panel, 101, a grid, 110, a first touch bar, 120, a second touch bar, 130, a pixel unit, 131, a red L ED element, 132, a green L ED element, 133, a blue L ED element.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Referring to fig. 1, fig. 1 shows a schematic structural diagram of a touch screen in an embodiment of the present invention, the touch screen provided in the embodiment of the present invention includes a cell board 100, a pixel unit 130 and a touch control element, and both the pixel unit 130 and the touch control element are electrically connected to the cell board 100. The touch control member includes a first touch bar 110 and a second touch bar 120, the first touch bar 110 and the second touch bar 120 are arranged in a mesh-like interlaced manner and form a plurality of grids 101, and each grid 101 is provided with a group of pixel units 130.

The cell plate 100 may be a cob (chip On board) plate, that is, the pixel unit 130 is electrically connected to the cell plate 100. The unit board 100 may be a Printed Circuit Board (PCB). In some embodiments, the cell plate 100 is a transparent plate, which may be, for example, tempered glass, ordinary glass, or transparent plastic, etc.

The pixel unit 130 includes red L ED element 131, green L ED element 132 and blue L ED element 133, and the red L ED element 131, green L ED element 132 and blue L ED element 133 are arranged in RGB stripe, wherein R represents red, G represents green and B represents blue, the RGB color mode is a general color standard, and is a color standard obtained by changing three color channels of red (R), green (G) and blue (B) and superimposing them on each other to obtain various colors, namely, three primary colors of red, green and blue, and according to a spatial color mixing method, three primary colors simultaneously irradiate three adjacent pieces of the same surface to mix colors, thereby generating abundant colors.

The touch member may be a transparent conductive film. The transparent conductive film is a film which can conduct electricity and has high transparency in a visible light range, and mainly comprises a metal film system, an oxide film system, other compound film systems, a polymer film system, a composite film system and the like. Wherein, the metal film has good conductivity. For example, the metal film-based conductive film may be a titanium oxide conductive film. For example, the first touch bar 110 and the second touch bar 120 are both long titanium oxide conductive films.

The touch screen further includes a touch chip, the first touch bar 110 and the second touch bar 120 are electrically connected to the cell board 100, and the cell board 100 is electrically connected to the touch chip, for example, when a finger touches different positions of the touch control, capacitances with different sizes are formed between the first touch bar 110 and the second touch bar 120, and the capacitance is identified by the touch chip to obtain a touch position of the finger. Specifically, the first touch bar 110 and the second touch bar 120 intersect, and a capacitance is formed at the intersection. The first touch bar 110 and the second touch bar 120 respectively constitute two poles of a capacitor at the intersection. And touching the touch screen by a finger, wherein the contact position of the finger and the touch screen is a touch point. When a finger touches the touch screen, the coupling between the two electrodes near the touch point is affected, thereby changing the capacitance between the two electrodes. For example, all the first touch bars 110 send out the excitation signal, and all the second touch bars 120 receive the excitation signal, so that the capacitance value at the intersection of all the first touch bars 110 and the second touch bars 120 of the whole touch screen can be obtained. When a finger touches the touch screen, the coupling between the two electrodes near the touch point is influenced, so that the capacitance between the two electrodes is changed, and the coordinates of the touch point are calculated through the touch chip according to the change of the capacitance.

In one scenario, a large touch screen may be cut into multiple small touch screens of different sizes. As shown in fig. 2, a larger touch screen is cut along a cutting line a shown by a dotted line to form six small touch screens P1, P2, P3, P4, P5 and P6 with different sizes, and each of the small touch screens, i.e., P1, P2, P3, P4, P5 and P6, includes a plurality of first touch bars 110 and second touch bars 120 arranged in a mesh-like interlaced manner. Because the touch function in the touch screen is realized by the first touch bars 110 and the second touch bars 120 which are arranged in a mesh-like interlaced manner, each small cut touch screen can realize a complete touch function.

In contrast, a conventional touch screen, which may be an infrared touch screen, is provided, and an X, Y-directional dense infrared matrix is used to detect and locate the touch position of the user. The existing infrared touch screen is provided with a circuit board outer frame on a display screen, a circle of infrared emission tubes are arranged on the circuit board outer frame on four sides of the display screen, the infrared emission tubes on a group of opposite side edges are in one-to-one correspondence, and a crisscross infrared matrix is formed for the infrared emission tubes on two pairs of side edges of a square display screen. When a user touches the screen, the fingers can block two transverse and vertical infrared rays passing through the touch position, and then the position of a touch point on the screen is judged through the touch chip. Therefore, the touch function of the traditional touch screen is realized through the circuit board outer frame, if a larger touch screen is cut into a plurality of small touch screens, or the circuit board outer frame is damaged, so that the touch function is damaged, or a new circuit board outer frame needs to be redesigned, which wastes time and labor. Therefore, the touch screen in the embodiment of the application can be cut into small touch screens with any shape or size according to needs in theory, and the touch function of the touch screen is not damaged.

It should be further noted that the structural diagram of the touch screen shown in fig. 1 is a schematic diagram in principle, and does not represent a real size, for example, for the real size, the distance between adjacent pixel units 130 may be 0.2 mm. The first touch bar 110 is disposed between adjacent pixel units 130, and the second touch bar 120 is also disposed between adjacent pixel units 130. That is, the widths of the first and

second touch bars

110 and 120 may be less than 0.2 mm. As shown in fig. 2, the cut touch screen typically has a minimum size of 1 cm, so that the cut touch screen still contains a sufficient number of first touch bars 110 and second touch bars 120 to implement the touch function.

As shown in fig. 2, the touch screen in the embodiment of the present application not only can cut a larger touch screen into a plurality of small touch screens P1, P2, P3, P4, P5 and P6 with different sizes; as shown in FIG. 3, a plurality of small touch screens P11, P22, P33, P44, P55 and P66 with different sizes can be spliced into a large touch screen.

As shown in fig. 3, in a usage scenario, a plurality of small touch screens P11, P22, P33, P44, P55 and P66 with different sizes are spliced into a large-sized touch screen. The six small touch screens P11, P22, P33, P44, P55 and P66 with different sizes are spliced along a splicing line B shown by a dotted line to form a whole large touch screen. Each small touch screen P11, P22, P33, P44, P55 and P66 comprises a plurality of first touch bars 110 and second touch bars 120 which are arranged in a mesh-like interlaced manner, after splicing, the respective first touch bars 110 of the adjacent small touch screens can be electrically connected, and the respective second touch bars 120 of the adjacent small touch screens are electrically connected, so that the large touch screen formed after splicing can also realize a complete touch function.

With continued reference to fig. 1, since one group of pixel units 130 is disposed in each grid 101, each group of pixel units 130 can theoretically be touched. The distance between adjacent pixel units 130 may be 0.2mm according to the real size of the screen, that is, each pixel unit 130 can be touched theoretically. When the display screen is touched by a finger, the finger can usually contact tens or even hundreds of pixel units 130, and after the finger is analyzed and processed by the touch chip, an accurate touch position can be obtained.

As shown in fig. 1, the touch member includes a first touch bar 110 and a second touch bar 120 which are interlaced in a mesh shape. The first touch bar 110 extends along the first direction 10 and the plurality of first touch bars 110 are arranged along the second direction 20, for example, X1, X2, X3, X4 and X5 are all the first touch bars 110, and X1, X2, X3, X4 and X5 are parallel to each other; the second touch bar 120 extends along the second direction 20, and the plurality of second touch bars 120 are arranged along the first direction 10, for example, Y1, Y2, Y3, Y4, and Y5 are all the second touch bars 120, and Y1, Y2, Y3, Y4, and Y5 are parallel to each other. The extending direction refers to a length direction of the first touch bar 110 or the second touch bar 120, and the first direction 10 is perpendicular to the second direction 20. The first touch-control strips 110 and the second touch-control strips 120 are interlaced to form a plurality of grids 101, the grids 101 are arranged in a matrix, and each grid 101 is provided with a group of pixel units 130.

In some embodiments, the first touch bars 110 and the second touch bars 120 arranged in a mesh-like interlaced manner form a square grid 101, and the extending directions of the first touch bars 110 and the second touch bars 120 are perpendicular to each other. For another example, the first touch bars 110 and the second touch bars 120 arranged in a mesh-like interlaced manner may also form a rectangular grid 101. It should be understood that the shape of the grid 101 is not limiting to the present application, and may be, for example, a diamond shape or other shapes.

As shown in fig. 1, the unit panel 100 is provided with a display region and a non-display region, the display region is arranged in a matrix on the unit panel 100, and the pixel units 130 are arranged in the display region; the adjacent display areas are non-display areas, and the first touch bars 110 and the second touch bars 120 are arranged in the non-display areas in a mesh-like interlaced manner. In order to improve the display effect, the first touch bar 110 and the second touch bar 120 are made of transparent materials, and even if the first touch bar 110 and the second touch bar 120 are disposed in the non-display area, the first touch bar 110 and the second touch bar 120 made of transparent materials do not affect the imaging effect of the touch screen. For example, each of the first touch bar 110 and the second touch bar 120 includes a transparent film substrate, and further includes a conductive coating disposed on the transparent film substrate. The conductive coating includes, but is not limited to, platinum (Pt), palladium (Pd), iridium (Ir), gold (Au), tungsten (W), nickel (Ni), silver (Ag), aluminum (Al), Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), or titanium oxide (TIO).

The method for manufacturing the touch screen comprises the following steps:

and S11, providing the cell board 100. The unit panel 100 is a transparent unit panel 100, and preferably, the unit panel 100 may be a glass unit panel 100. The unit panel 100 is provided with a display area for providing a display function and a non-display area for providing a touch function.

The cell plate 100 may be a cob (chip On board) plate, that is, the pixel unit 130 is soldered On the cell plate 100. The unit board 100 may be a Printed Circuit Board (PCB). Preferably, the unit panel 100 may be a transparent panel. In some embodiments, the cell plate 100 may be a transparent plate, and may be tempered glass, ordinary glass, or transparent plastic, etc.

S12, forming a pixel unit 130 in each display region. The pixel unit 130 formed at each pixel region includes a first transistor, a second transistor, and a third transistor. The transistor is a solid semiconductor device, and includes a diode, a triode, a field effect transistor, a thyristor, and the like. Among them, the first transistor, the second transistor, and the third transistor are preferably thin film transistors. The thin film transistor can be a polycrystalline silicon thin film transistor, an amorphous silicon thin film transistor or an oxide thin film transistor.

For example, the first transistor may be a red L ED element 131, the second transistor may be a green L ED element 132, the third transistor may be a blue L ED element 133, the red L ED element 131, the green L ED element 132, and the blue L ED element 133 are RGB stripe arrangements.

S13, forming a touch control element in the non-display area, where the touch control element includes a first touch bar 110 and a second touch bar 120, and the first touch bars 110 and the second touch bars 120 are interlaced in a mesh shape and form a plurality of grids 101. In this step, a plurality of first touch bars 110 parallel to each other may be formed in the non-display area, and then a plurality of second touch bars 120 parallel to each other may be formed in the non-display area.

And S14, forming a protective layer on the touch control piece. The protective layer may be a glass layer for protecting the pixel unit 130 and the touch control member.

One embodiment of the present application provides a tiled display device. The spliced display device comprises a plurality of touch screens, and each touch screen can independently realize a display function and a touch function before splicing. The touch screens can be spliced to form a large-size spliced display device. The tiled display device can be applied to billboards and the like. And when the touch screens are spliced, the touch screens are electrically connected to form the spliced display device.

In contrast, after a plurality of touch screens are spliced, circuit board outer frames are arranged on four sides of the traditional spliced display device, and the circuit board outer frames are provided with infrared transmitting tubes and infrared receiving tubes, so that an infrared detection net is formed on the surface of the spliced display device, and any touch object can change the infrared rays on the contacts to realize the operation of the touch screens. The touch-operated object (such as a finger) can change the infrared ray of the touch point, and then the infrared ray is converted into the coordinate position of touch control to realize the response of operation. On infrared formula touch screen, the circuit board frame that concatenation formula display device's four sides were arranged has infrared transmitting tube and infrared receiving tube, corresponds and forms the infrared ray matrix of crossing anyhow to realize the touch-control function. In this application, need not set up the circuit board frame at concatenation formula display device four sides, consequently not be subject to the shape and the size of circuit board frame, consequently can splice the concatenation formula display device who forms various sizes or shape according to the demand.

In one embodiment, the size of each touch screen spliced into the tiled display device is different. That is to say, can allow the touch-sensitive screen of multiple different sizes to splice, improved the concatenation formula display device's after the concatenation variety greatly. In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A touch screen, comprising:

a cell plate (100);

the touch control piece is electrically connected to the unit board (100), the touch control piece comprises a first touch control strip (110) and a second touch control strip (120), and a plurality of first touch control strips (110) and a plurality of second touch control strips (120) are arranged in a mesh-shaped interweaving manner and form a plurality of grids (101);

a pixel unit (130) electrically connected to the unit board (100) and disposed in the grid (101); and

and the touch chip is electrically connected to the unit plate (100), the first touch strip (110) and the second touch strip (120).

2. A touch screen according to claim 1, wherein a group of said pixel cells (130) is arranged in each of said grids (101).

3. The touch screen of claim 2, wherein the pixel cells (130) comprise red L ED elements (131), green L ED elements (132), and blue L ED elements (133), and the red L ED elements (131), green L ED elements (132), and blue L ED elements (133) are in an RGB stripe arrangement.

4. The touch screen of claim 1, wherein the unit panel (100) is provided with a display area and a non-display area, the display area is arranged in a matrix, the pixel units (130) are arranged in the display area, and the first touch bars (110) and the second touch bars (120) are arranged in the non-display area in a mesh-like interlaced manner.

5. The touch screen of claim 1, wherein the first touch bars (110) extend in parallel.

6. The touch screen of claim 5, wherein the extending directions of the second touch bars (120) are parallel to each other.

7. The touch screen of claim 1, wherein the first touch bar (110) and the second touch bar (120) are both transparent touch bars.

8. A touch screen according to claim 1, wherein the grid (101) is square, rectangular or diamond shaped.

9. A tiled display comprising the touch screen of any of claims 1-8, wherein a plurality of the touch screens are electrically connected and tiled to form the tiled display.

10. The tiled display arrangement according to claim 9, wherein the individual touch screens tiled into a tiled display arrangement are different in size.