CN103336598B - Touch control display device - Google Patents

Abstract

A touch display device, comprising: the touch control display device comprises a touch control panel, a liquid crystal display panel and a noise shielding layer positioned between the touch control panel and the liquid crystal display panel, wherein the noise shielding layer is used for transmitting noise generated by the liquid crystal display panel to a grounding end through grounding setting so as to prevent the noise from generating interference on the touch control panel. The method is used for detecting the grounding condition of the noise shielding layer after the touch panel is attached to the liquid crystal display panel.

Description

touch display device

technical field

The invention relates to a touch display device.

Background technique

In order to overcome the interference of the noise generated by the liquid crystal display panel (OpenCell) on the touch panel (TouchPanel), touch display devices based on IPS (In-Plane Switching) technology are mostly installed between the liquid crystal display panel and the touch panel. A noise shielding layer is directly connected to the ground terminal of the circuit, so that the noise will be directly transmitted to the ground terminal. The noise shielding layer can be made of transparent conductive materials such as indium tin oxide (ITO). At present, the methods of grounding the noise shielding layer are generally divided into the following two types:

(1) Lap the frame (Frame) of the touch display device by pasting conductive materials, such as conductive aluminum foil;

(2) Ground by dotting silver glue or attaching a small piece of conductive material between the color filter (CF) and the thin film transistor (TFT).

However, if the above two grounding methods are used, when the ADB (Advance Direct Bonding) process is used, since the OpenCell has been bonded to the TouchPanel first, the overlap between the noise shielding layer and the ground terminal has been covered by the TouchPanel, and it is impossible to confirm the conductive material such as conductive aluminum foil. Or whether the overlap between the silver glue noise shielding layers is in good condition. At the same time, after the ADB process, it is impossible to confirm whether the conductive material is separated from the ground terminal, resulting in a product with poor grounding of the shielding layer.

Contents of the invention

In order to solve the above problems, it is necessary to provide a touch display device that can quickly detect whether the noise shielding layer is well grounded after the touch panel is attached to the liquid crystal display panel.

The touch display device provided by the present invention includes: a touch panel, a liquid crystal display panel, and a noise shielding layer located between the touch panel and the liquid crystal display panel, and the noise shielding layer is used to ground the liquid crystal display panel to generate The noise is transmitted to the ground terminal to prevent the noise from interfering with the touch panel. The touch display device also includes at least two conductive strips arranged on the liquid crystal display panel and respectively connected to the noise shielding layer at different positions. Each conductive strip includes a protruding portion protruding from one side of the liquid crystal display panel to the outside of the liquid crystal display panel for measuring whether the noise shielding layer is well grounded after the touch panel and the liquid crystal display panel are bonded together.

Compared with the prior art, the touch display device of the present invention is connected to the noise shielding layer by arranging at least two conductive strips at different positions, and after the touch panel and the liquid crystal display panel are bonded, the measuring device can Measuring the potential of the portion where the conductive strip protrudes from the liquid crystal display panel is used to conveniently detect whether the noise shielding layer is well grounded, thereby avoiding products with poor grounding of the noise shielding layer.

Description of drawings

FIG. 1 is a schematic diagram of a touch display device provided by the present invention.

FIG. 2 is a front view of a liquid crystal display panel of the touch display device in an embodiment.

FIG. 3 is a front view of a liquid crystal display panel of the touch display device in another embodiment.

Fig. 4 is a rear view of the touch panel and the liquid crystal display panel of the touch display device bonded together.

Fig. 5 is a cross-sectional view along line V-V in Fig. 4 .

Description of main component symbols

touch display device 100 touch panel 10 noise masking layer 11 LCD panel 20 Glass base board twenty one color filter twenty two liquid crystal layer twenty three TFT substrate twenty four first conductive band 30 second conductive band 31 first protrusion 301 second protrusion 311 Conductive material 40

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

detailed description

Please refer to FIG. 1 , which is a schematic diagram of a touch display device 100 provided by the present invention. For the convenience of description, only some elements related to the present invention are shown in the figure, and not all elements of the touch display device 100 are listed one by one. The touch display device 100 includes a touch panel 10 , a liquid crystal display panel (OpenCell) 20 , and a noise shielding layer 11 between the touch panel 10 and the liquid crystal display panel 20 . The liquid crystal display panel 20 includes a glass substrate 21 , a color filter 22 , a liquid crystal layer 23 and a thin film transistor (TFT) substrate 24 which are stacked. The color filter 22 and the liquid crystal layer 23 are located between the glass substrate 21 and the TFT substrate 24 . It should be understood that the touch display device 100 of the present invention also includes other components other than the above components, such as polarizers and a backlight module.

The noise shielding layer 11 is located directly below the touch panel 10 and directly above the liquid crystal display panel 20, and is directly connected to the ground terminal, so as to transmit the noise generated by the liquid crystal display panel 20 to the ground terminal to avoid damage to the touch panel. interference. In this embodiment, the noise shielding layer 11 can be made of transparent conductive material such as indium tin oxide (ITO). The noise shielding layer 11 is connected to the frame (Frame) of the touch display device 100 by pasting a conductive material (such as conductive aluminum foil, etc.) Dot silver glue or stick a small piece of conductive material in between for grounding. It should be understood that, in other embodiments, the noise shielding layer 11 may also be grounded in other feasible ways.

As shown in FIG. 2 , the touch display device 100 further includes at least two conductive strips, such as a first conductive strip 30 and a second conductive strip 31 . The at least two conductive strips are arranged on the liquid crystal display panel 20 and are respectively connected to the noise shielding layer 11 at different positions, and each conductive strip includes one side of the liquid crystal display panel 20 protruding from the liquid crystal display panel 20 The protruding part outside is used to measure whether the noise shielding layer 11 is well grounded. Preferably, each conductive strip is made of a transparent conductive material, such as the same material as the noise shielding layer 11 .

Preferably, as shown in FIG. 2, the at least two conductive strips are arranged on the TFT substrate 24 of the liquid crystal display panel 20, and the protruding part of each conductive strip protrudes from one side of the TFT substrate 24, and then protrudes from the entire liquid crystal display panel. 20, in order to measure whether the noise shielding layer 11 is well grounded.

In this embodiment, the touch display device 100 only includes the first conductive strip 30 and the second conductive strip 31 as an example for illustration.

As shown in FIG. 2, the first conductive strip 30 and the second conductive strip 31 are respectively located on different sides of the TFT substrate 24, for example, respectively located on the side (gate side) where the scan signal is generated for the TFT substrate 24 and the side where the data signal is input. side (source side). The first conductive strip 30 and the second conductive strip 31 cover the top of the TFT substrate 24 and can be overlapped with the noise shielding layer 11 by dispensing silver glue or pasting conductive material. The first conductive strip 30 includes a first protruding portion 301 protruding from the TFT substrate 24 at the gate side of the TFT substrate 24 . The second conductive strip 31 includes a second protruding portion 311 , and the second protruding portion 311 protrudes outside the TFT substrate 24 from the other side of the TFT substrate 24 opposite to the gate side.

In one embodiment, the first conductive strip 30 and the second conductive strip 31 are spaced apart from each other. In another embodiment, as shown in FIG. 3, an insulator 32 is arranged between the first conductive strip 30 and the second conductive strip 31, so that the first conductive strip 30 and the second conductive strip 31 are physically connected through the insulator 32 . And the first conductive strip 30 , the insulator 32 and the second conductive strip 31 are integrally formed.

Referring to FIG. 4 , it is a rear view of the touch display device 100 after the touch panel 10 and the liquid crystal display panel 20 are attached. After the touch panel 10 is bonded to the liquid crystal display panel 20, since the first protruding portion 301 of the first conductive strip 30 and the second protruding portion 311 of the second conductive strip 31 protrude from one side of the TFT substrate 24 Except for the liquid crystal display panel 20 , the first conductive strip 30 and the second conductive strip 31 are not completely covered by the touch panel 10 and the liquid crystal display panel 20 . Therefore, a measuring device, such as a multimeter, can be used to measure the potentials at the first protruding portion 301 and the second protruding portion 311 respectively, and the noise shielding layer 11 can be quickly judged by comparing whether the two measured potentials are equal. Is it well grounded.

Participate in Figure 5, which is a cross-sectional view along the V-V line in Figure 4. The first conductive strip 30 is disposed on the side of the TFT substrate 24 close to the liquid crystal layer 23, and the first protrusion 301 of the first conductive strip 30 protrudes from the side of the TFT substrate 24 outside the TFT substrate 24, And further protrudes beyond the entire liquid crystal display panel 20 . The first conductive strip 30 is connected to the noise shielding layer 11 through the conductive material 40 . Preferably, the conductive material 40 is conductive glue, such as silver glue. The connection between the second conductive strip 31 and the noise shielding layer 11 is similar to the connection between the first conductive strip 30 and the noise shielding layer 11 , and will not be repeated here.

In addition, when two or more conductive strips are respectively connected to the noise shielding layer 11 at different positions, any two of the two or more conductive strips are spaced apart or physically connected through an insulator, and each conductive strip The tape can be connected to the noise shielding layer 11 through the conductive material 40 .

In the present invention, the size of the protruding portion of each conductive strip can be predetermined according to the actual product. At the same time, in the subsequent process of the touch display device 100, the protruding part of the conductive strip protruding from the liquid crystal display panel 20 can be cut off or bent in a direction away from the touch panel 10, so as to prevent the protruding part from affecting the subsequent The impact of the process.

To sum up, the present invention connects to the noise shielding layer 11 by setting at least two conductive strips at different positions respectively. After the touch panel 10 and the liquid crystal display panel 20 are bonded together, the conductive strips can be measured respectively by using a measuring device. With the potential at the portion protruding from the liquid crystal display panel 20 , it is convenient to detect whether the noise shielding layer 11 is well grounded, thereby avoiding products with poor grounding of the noise shielding layer 11 .

The above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced. Without departing from the spirit and scope of the technical solution of the present invention.

Claims (10)

1. a touch control display apparatus, comprise: contact panel, display panels and the assorted news shielding layer between contact panel and display panels, this assorted news shielding layer is used for arranging the assorted news by display panels produces by ground connection and passes to ground terminal, prevent assorted news from contact panel is produced interference, it is characterized in that, this touch control display apparatus also comprises at least two conduction bands being arranged on display panels and be connected with assorted news shielding layer respectively in different positions place, every bar conduction bands comprise the protuberance outside protruding from this display panels from this display panels side, for measuring assorted news shielding layer after contact panel and display panels laminating, whether ground connection is good.

2. touch control display apparatus as claimed in claim 1, it is characterized in that, described display panels comprises glass substrate, colored filter, liquid crystal layer and the TFT substrate that stacking is arranged, described at least two conduction bands are arranged in this TFT substrate, and the protuberance of every bar conduction bands is outstanding from the side of TFT substrate, and then outside protruding from whole display panels.

3. touch control display apparatus as claimed in claim 2, it is characterized in that, described at least two articles of conduction bands comprise the first conduction bands and the 2nd conduction bands that lay respectively at the different side of TFT substrate, these first conduction bands comprise the first protuberance, 2nd conduction bands comprise the 2nd protuberance, and this first protuberance and the 2nd protuberance are outside the both sides of TFT substrate protrude from this TFT substrate.

4. touch control display apparatus as claimed in claim 3, it is characterized in that, described first conduction bands and the 2nd conduction bands are separately positioned in TFT substrate near the both sides of liquid crystal layer, these first conduction bands and the 2nd conduction bands, and by conductive material, news shielding layer is connected with mixing.

5. touch control display apparatus as claimed in claim 3, it is characterized in that, described first conduction bands are positioned in TFT substrate to produce the side of sweep signal, the side that described 2nd conduction bands are positioned in TFT substrate input data signal, outside described first protuberance protrudes from TFT substrate from the side of this generation sweep signal, outside described 2nd protuberance protrudes from this TFT substrate from another side relative with this generation sweep signal side.

6. touch control display apparatus as claimed in claim 3, it is characterised in that, described first conduction bands and the 2nd conduction bands are arranged at interval each other.

7. touch control display apparatus as claimed in claim 3, it is characterised in that, between described first conduction bands and described 2nd conduction bands, an isolator is set, these first conduction bands and the 2nd conduction bands are by this isolator physical connection.

8. touch control display apparatus as claimed in claim 1, it is characterised in that, any interval therebetween of described at least two conduction bands arranges or passes through an isolator physical connection.

9. touch control display apparatus as claimed in claim 1, it is characterised in that, described conduction bands are made up of transparent conductive material.

10. touch control display apparatus as claimed in claim 9, it is characterised in that, described conduction bands are made up of tin indium oxide.