CN101833184A - Integration structure of capacitance type touch control panel and liquid crystal display panel - Google Patents

Abstract

Provided is an integrated structure of a capacitive touch panel and a liquid crystal display panel. The integrated structure of the capacitive touch panel and the liquid crystal display panel is that a first touch sensing electrode layer is formed on an upper polarizing plate of the liquid crystal display panel, and a second touch sensing electrode layer is formed under the upper polarizing plate of the liquid crystal display panel. A touch object senses the first touch sensing electrode layer and the second touch sensing electrode layer to generate a capacitive coupling corresponding relationship, thereby achieving a touch effect.

Description

Integrated structure of capacitive touch panel and liquid crystal display panel

technical field

The present invention relates to a design combining a touch panel and a liquid crystal display panel, in particular to an integrated structure of a capacitive touch panel and a liquid crystal display panel.

Background technique

Liquid crystal display panels (LCD) have been widely used by people at present, and there are various structural designs related to the liquid crystal display panels. Referring to FIG. 1 and FIG. 2 at the same time, it is a schematic cross-sectional view showing a structure of a known liquid crystal display panel and a schematic cross-sectional structure of a liquid crystal display module. As shown in the figure, the liquid crystal display panel 1 includes a liquid crystal display module 10 and a protective plate 11 .

The LCD module 10 includes a lower polarizer 12 , a lower substrate 101 , a lower conductive layer 102 , a liquid crystal layer 103 , an upper conductive layer 104 , a color filter layer 13 , an upper substrate 105 and an upper polarizer 14 .

Regarding the combination of the liquid crystal display panel and the touch panel, there is currently a technology for combining the liquid crystal display panel with the touch panel, which makes the operation easier. In the early touch design with resistive film circuit, the pressure caused by the touch body and the display element at the contact position made the two layers of resistive film contact, thus closing a switch and sending a touch signal to a controller for further processing, and the contact position was thus was detected. However, after long-term pressing, the resistive film of the touch panel is damaged due to continuous pressing deformation, which causes a problem of reliability of the touch panel.

There is a capacitive touch panel as an improvement to the shortcomings of the resistive film line touch design. The structure of the capacitive touch panel is composed of a touch-sensing pattern layer on the top and a bottom layer, and a dielectric layer between the two touch-sensing pattern layers. When the liquid crystal display panel and the capacitive touch panel are combined, they are usually produced separately first, and then stacked sequentially to form a whole. In this way, the user can use a conductive object such as a finger or a stylus to click according to the patterns and characters displayed on the surface of the touch panel for input and operation.

Contents of the invention

The technical problem to be solved by the present invention:

Both the touch panel and the liquid crystal display panel need to have a protective plate on the surface, and the protective plate is usually made of the same glass material, which consumes a lot of production materials repeatedly during manufacture. In addition, the touch panel and the liquid crystal display panel are usually produced separately first, and then stacked and laminated sequentially. This assembly method is more complicated, wastes man-hours, and easily produces defective products. In addition, the method of separate production and stacking will result in a thicker product after completion, which will increase the difficulty of thinner product design.

Therefore, the object of the present invention is to provide an integrated structure of a capacitive touch panel and a liquid crystal display panel. change.

The technical means of the present invention to solve the problem:

The technical means adopted by the present invention to solve the problems of the known technology include a liquid crystal display panel, a first touch sensing electrode layer and a second touch sensing electrode layer. The liquid crystal display panel includes a liquid crystal display module, and the liquid crystal display module includes a lower polarizer and an upper polarizer. The first touch sensing electrode layer has a predetermined electrode pattern and is formed on the upper polarizer; the second touch sensing electrode layer has a predetermined electrode pattern and is formed under the upper polarizer.

In an embodiment of the present invention, it may also only include a liquid crystal display panel and a capacitive touch-sensing pattern layer, and the capacitive touch-sensing pattern layer is formed on or under the upper polarizer.

The present invention contrasts the effect of known technology:

Through the technical means adopted in the present invention, the capacitive touch panel and the liquid crystal display panel are integrated into one, and the integration method does not need to add additional substrates, so that the overall thickness will not increase, which is helpful for the thinning of the product and reduces the product weight. Furthermore, the capacitive touch panel is not produced separately from the liquid crystal display panel and then assembled, but is directly integrated into the liquid crystal display panel, so it has the advantages of simple process, high yield and low production cost when it is used in the industry. Thereby improving processability and benefiting output yield. Furthermore, since the touch sensing electrode layer in the present invention is combined with the upper polarizer of the liquid crystal display panel, which is closer to the user's finger or the operating surface of the touch object, the touch sensing electrode layer has higher sensitivity.

Description of drawings

FIG. 1 is a schematic cross-sectional view showing a structure of a known liquid crystal display panel;

2 is a schematic cross-sectional view showing a structure of a known liquid crystal display module;

Fig. 3 is a schematic cross-sectional view showing the structure of the first embodiment of the present invention;

Fig. 4 is a perspective exploded view showing the first embodiment of the present invention;

FIG. 5 is an exploded perspective view showing a second embodiment of the present invention;

FIG. 6 is an exploded perspective view showing a third embodiment of the present invention;

7 is a partial cross-sectional schematic diagram showing a capacitive touch sensing pattern layer;

FIG. 8 is an exploded perspective view showing a fourth embodiment of the present invention.

Reference number

100, 100a, 100b, 100c Integrated structure

1 LCD display panel

10 LCD display module

101 Lower substrate

102 Lower conductive layer

103 Liquid crystal layer

104 upper conductive layer

105 Upper substrate

11 Protection board

12 Lower polarizer

13 Color filter layer

14 Upper polarizer

2 The first touch sensing electrode layer

20, 20a Electrode pattern

21, 22 Electrodes

3 The second touch sensing electrode layer

30, 30a electrode pattern

31, 32 Electrodes

4 Touch Sensitive Pattern Layer

40 Electrode pattern

41 first electrode

411 Electrodes

42 Second electrode

421 Electrodes

43 Insulation layer

X, Y axis

Detailed ways

The specific embodiments adopted by the present invention will be further described through the following embodiments and the accompanying drawings.

Referring to FIG. 3 , it is a schematic cross-sectional view showing the structure of the first embodiment of the present invention. As shown in the figure, the integrated structure 100 of a capacitive touch panel and a liquid crystal display panel according to the first embodiment of the present invention includes a liquid crystal display panel 1, a first touch sensing electrode layer 2 and a second touch sensing electrode layer 3 .

The liquid crystal display panel 1 is a known structure, which is the same as the aforementioned FIG. 1 and FIG. The color filter layer 13 , the upper substrate 105 , the upper polarizer 14 and the protection plate 11 . The color filter layer 13 mainly includes known black matrix (Black Matrix) and color photoresist (Color Resist).

The first touch sensing electrode layer 2 is formed on the upper polarizer 14 ; the second touch sensing electrode layer 3 is formed under the upper polarizer 14 .

Referring to FIG. 4 , it is a three-dimensional exploded view showing the first embodiment of the present invention. As shown in the figure, the first touch sensing electrode layer 2 has a predetermined electrode pattern 20, the electrode pattern 20 includes a plurality of strip-shaped electrodes 21, and each electrode 21 is parallel to each other but not in contact with each other. The second touch sensing electrode layer 3 has a predetermined electrode pattern 30. The electrode pattern 30 includes a plurality of strip-shaped electrodes 31, and each electrode 31 is parallel to each other but not in contact with each other. Each electrode 21 of the first touch sensing electrode layer 2 and each electrode 31 of the second touch sensing electrode layer 3 are electrically connected to a controller (not shown in the figure).

In this embodiment, the arrangement direction of each strip-shaped electrode 21 of the first touch-sensing electrode layer 2 and the arrangement direction of each strip-shaped electrode 31 of the second touch-sensing electrode layer 3 are mutually compatible. vertical. The electrodes 21 of the first touch-sensing electrode layer 2 are responsible for touch sensing along a predetermined axis Y, and the electrodes 31 of the second touch-sensing electrode layer 3 are responsible for touch sensing along a predetermined axis X. In practice, the electrodes 21 of the first touch-sensing electrode layer 2 can also be set to be responsible for the touch sensing of the axis X, and the electrodes 31 of the second touch-sensing electrode layer 3 can be set to be responsible for the touch sensing of the axis Y. induction.

The electrodes 22, 32 of the strip-shaped electrodes 21, 31 in the electrode pattern can be implemented differently, and can be rhombus, square, regular hexagon, etc., as shown in the integrated structure 100a in Fig. 5, the first Each strip-shaped electrode 21 in the electrode pattern 20a of the touch-sensing electrode layer 2 is formed by connecting a plurality of electrodes 22 in a hexagonal geometric outline shape. The electrode pattern of the second touch-sensing electrode layer 3 Each elongated electrode 31 in 30a is formed by connecting a plurality of electrodes 32 with a hexagonal geometric outline.

When the user uses a touch object (such as a finger or other conductive object) to touch, since the first touch-sensing electrode layer 2 and the second touch-sensing electrode layer 3 combined in the liquid crystal display panel 1 are connected to the control device (not shown in the figure), so when a touch occurs, because the touch object respectively induces capacitive coupling with the first touch-sensing electrode layer 2 and the second touch-sensing electrode layer 3, the corresponding axes X, Y The position of the touch is further processed by sending a touch signal of potential change to the controller, and the touch position is detected to achieve the touch effect.

Referring to FIG. 6 and FIG. 7 at the same time, it is a three-dimensional exploded schematic diagram showing a third embodiment of the present invention and a partial cross-sectional schematic diagram of a capacitive touch sensing pattern layer. The structural design of the integrated structure 100b of this embodiment is substantially the same as that of the aforementioned first embodiment, so the same components are marked with the same element numbers for correspondence. The difference is that the integrated structure 100b includes a capacitive touch sensing pattern layer 4 formed on the upper polarizer 14 .

The capacitive touch sensing pattern layer 4 has a predetermined electrode pattern 40 , and the electrode pattern 40 includes a plurality of strip-shaped first electrodes 41 and a plurality of strip-shaped second electrodes 42 . The alignment directions of the first electrodes 41 and the second electrodes 42 are not parallel to each other and intersect, but an insulating layer 43 (as shown in FIG. 7 ) is formed at the intersection between the first electrodes 41 and the second electrodes 42, so that the second electrodes 42 across the first electrode 41 without contacting each other. Each of the first electrode 41 and the second electrode 42 is formed by connecting a plurality of electrodes 411 , 421 each having a hexagonal geometric outline shape. The use of the electrodes 22 and 32 with hexagonal geometric outlines can achieve the advantage of effectively improving the sensitivity of touch sensing.

When the user touches with a touch object (such as a finger or other conductive object), there will be a gap between the first electrode 41 and the second electrode 42 corresponding to the touched area due to the contact between the touch object and the first electrode. Capacitive coupling is induced between the electrode 41 and the second electrode 42, and according to the size and position of the touched area, a touch signal corresponding to a change in potential is sent to the controller, so that the first electrode 41 and the second electrode The touch signal transmitted by the axes X and Y corresponding to the two electrodes 42 and the size of the touched area determines the touch position of the touch object (not shown in the figure).

Referring to FIG. 8 , it is an exploded perspective view showing a fourth embodiment of the present invention. The structural design of the integrated structure 100c of this embodiment is substantially the same as that of the aforementioned third embodiment, so the same components are marked with the same element numbers for correspondence. The difference is that the capacitive touch sensing pattern layer 4 of the integrated structure 100 c is formed under the upper polarizer 14 . Similarly, the effect of touch is achieved through the corresponding relationship between the touch objects and the capacitive coupling between the first electrode 41 and the second electrode 42 .

From the above embodiments, it can be seen that the integrated structure of the capacitive touch panel and the liquid crystal display panel provided by the present invention has industrial application value, so the present invention already meets the requirements of the patent. The above descriptions are only descriptions of preferred embodiments of the present invention, and those skilled in the art can make other various improvements based on the above descriptions, and these changes still belong to the inventive spirit of the present invention and the scope defined by the claims.

Claims (11)

1. an integrated structure of a capacitive touch panel and a liquid crystal display panel, characterized in that, the integrated structure of the capacitive touch panel and a liquid crystal display panel comprises: A liquid crystal display panel, including a liquid crystal display module, and the liquid crystal display module includes a lower polarizer and an upper polarizer; A first touch sensing electrode layer, having a predetermined electrode pattern, formed on the upper polarizer; A second touch-sensing electrode layer, having a predetermined electrode pattern, formed under the upper polarizer, passing through the electrode pattern of the second touch-sensing electrode layer and the first touch-sensing electrode layer , causing a touch object to induce a corresponding capacitive coupling relationship with the first touch sensing electrode layer and the second touch sensing electrode layer respectively. 2. The integrated structure of a capacitive touch panel and a liquid crystal display panel according to claim 1, wherein the electrode patterns of the first touch sensing electrode layer and the second touch sensing electrode layer are respectively It includes a plurality of strip-shaped electrodes. 3. The integrated structure of a capacitive touch panel and a liquid crystal display panel as claimed in claim 2, wherein each strip of the first touch sensing electrode layer and the second touch sensing electrode layer Shaped electrodes are respectively formed by connecting a plurality of electrodes with a hexagonal geometric outline shape. 4. An integrated structure of a capacitive touch panel and a liquid crystal display panel, characterized in that, the integrated structure of the capacitive touch panel and a liquid crystal display panel comprises: A liquid crystal display panel, including a liquid crystal display module, and the liquid crystal display module includes a lower polarizer and an upper polarizer; A capacitive touch sensing pattern layer is formed on the upper polarizer. 5. The integrated structure of a capacitive touch panel and a liquid crystal display panel as claimed in claim 4, wherein the capacitive touch sensing pattern layer has a predetermined electrode pattern. 6. The integrated structure of a capacitive touch panel and a liquid crystal display panel as claimed in claim 5, wherein the electrode pattern of the capacitive touch sensing pattern layer comprises a plurality of elongated first electrodes and a plurality of elongated second electrodes, the arrangement directions of the first electrodes and the second electrodes are not parallel to each other and intersect each other, but the first electrodes and the second electrodes are not in contact. 7. The integrated structure of a capacitive touch panel and a liquid crystal display panel as claimed in claim 6, wherein each elongated first electrode and second electrode of the capacitive touch sensing pattern layer It is formed by connecting a plurality of electrodes in a hexagonal geometric outline shape. 8. An integrated structure of a capacitive touch panel and a liquid crystal display panel, characterized in that, the integrated structure of the capacitive touch panel and a liquid crystal display panel comprises: A liquid crystal display panel, including a liquid crystal display module, and the liquid crystal display module includes a lower polarizer and an upper polarizer; A capacitive touch sensing pattern layer is formed under the upper polarizer. 9. The integrated structure of a capacitive touch panel and a liquid crystal display panel as claimed in claim 8, wherein the capacitive touch sensing pattern layer has a predetermined electrode pattern. 10. The integrated structure of a capacitive touch panel and a liquid crystal display panel as claimed in claim 9, wherein the electrode pattern of the capacitive touch sensing pattern layer comprises a plurality of strip-shaped first electrodes and a plurality of elongated second electrodes, the arrangement directions of the first electrodes and the second electrodes are not parallel to each other and intersect each other, but the first electrodes and the second electrodes are not in contact. 11. The integrated structure of a capacitive touch panel and a liquid crystal display panel as claimed in claim 10, wherein each elongated first electrode and second electrode of the capacitive touch sensing pattern layer It is formed by connecting a plurality of electrodes in a hexagonal geometric outline shape.

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