CN201097040Y - Super-thin touch screen LCD - Google Patents

Abstract

The utility model relates to anultra-thin touch screen liquid crystal display device, which comprises a liquid crystal box enclosed by a first foundation plate, a second foundation plate, and edge frame adhesive, a touch screen device integrated at one side of the first foundation plate of the liquid crystal box for forming a touching point coordinate, and a controlling circuit for connecting the touch screen device and judging the touching point coordinate. The ultra-thin touch screen liquid crystal display device of the utility model reduces the thickness of the whole die assembly through integrating the touch screen device on the first foundation plate of the liquid crystal display device, realizes the ultra-thin development of the touch screen display device; simultaneously a double-faced adhesive layers of the traditional adhered touch screen and the device are eliminated, and therefore, the transmissibility of the overall touch screen display device is improved.

Description

Ultra-thin touch screen LCD monitor

technical field

The utility model relates to a display device, in particular to an ultrathin liquid crystal display with a touch screen.

Background technique

Along with increasing with each passing day of multimedia information inquiry, people use touch screen more and more. As the latest input device, the touch screen is currently the simplest, most convenient and natural way of human-computer interaction. It endows multimedia with a new look and is a very attractive new multimedia interactive device.

Touch-screen is boundless in the range of application of my country, mainly contains the inquiry of public information; As the service inquiry of departments such as telecommunication bureau, the tax bureau, bank, electric power; Electronic games, ordering songs and dishes, multimedia teaching, real estate pre-sales, etc.

With the penetration of touch screen products in mobile phones, more and more displays use touch screens as input devices. At present, most touch screen liquid crystal display modules use double-sided adhesive to glue the touch screen device and liquid crystal display device together. Such a module is relatively thick, and the light transmittance is not high enough, which is not suitable for the current requirements of thin and light modules.

Therefore, there is an urgent need for a new touch-screen liquid crystal display that can solve the above-mentioned problems in the traditional touch-screen liquid crystal display.

Contents of the invention

The purpose of the utility model is to overcome the defects of the above-mentioned prior art and provide an ultra-thin liquid crystal display with a touch screen.

Another object of the utility model is to provide a touch-screen liquid crystal display with high light transmittance.

In order to achieve the above purpose, the technical solution of the present utility model is: an ultra-thin touch-screen liquid crystal display, including a liquid crystal box surrounded by a first substrate, a second substrate and frame glue, and also includes a first integrated on the display side of the liquid crystal box A touch screen device on a substrate for forming touch point coordinates and a control circuit connected to the touch screen device for judging the touch point coordinates.

Preferably, the touch screen device adopts a capacitive touch screen device, including a touch screen working surface covering the surface of the first substrate and electrode lines drawn out from the working surface.

Preferably, the touch screen device adopts a resistive touch screen device, including an upper electrode layer, a lower electrode layer and a spacer separating the upper electrode layer and the lower electrode layer, and the lower electrode layer is integrated on the first substrate.

For the capacitive touch screen device, four electrode wires are respectively drawn from the four corners of the working surface, and the electrode wires are connected to the control circuit through a flexible circuit board, and the touch points on the working surface are connected to the electrode wires. The current is proportional to the relationship, and the control circuit judges the magnitude of the current and determines the coordinates of the touch point.

Preferably, the electrode lines are silk-screened silver paste electrodes, and the flexible circuit board is pressed on the silver paste electrodes.

Preferably, a layer of transparent insulating ink is provided on the working surface and the surface of the electrode wire.

Preferably, the surface of the insulating ink is covered with an upper polarizer.

Preferably, a transparent protective layer is provided on the surface of the upper polarizer.

Specifically, liquid crystals are contained in the liquid crystal cell, a touch screen device is integrated on the surface of the first substrate, and pixel electrodes are arranged on the inner side, and scanning electrodes are arranged on the side facing the pixel electrodes of the second substrate, and the pixel electrodes and the scanning electrodes are Image information is displayed under control of the processor.

The utility model adopts the technical solution, and its beneficial technical effects are: 1) the ultra-thin touch screen liquid crystal display of the present utility model integrates the touch screen device on the surface of the liquid crystal display, specifically the capacitive touch screen is integrated in the liquid crystal display On the first substrate of the LCD, so as to reduce the thickness of the entire module and achieve ultra-thin touch screen display; 2) The ultra-thin touch screen liquid crystal display of the utility model integrates the capacitive touch screen on the first substrate of the liquid crystal display , Eliminate the double-sided adhesive layer of the traditional bonded touch screen and display, thereby increasing the transmittance of the whole touch screen display; The conductivity of the silver paste is very good, so that the tiny current generated when touching can also be accurately transmitted to the control circuit for detection; 4) In the ultra-thin touch screen liquid crystal display of the present invention, a layer of transparent The insulating ink of protective electrode; 5) ultra-thin touch screen liquid crystal display of the present utility model, the surface of described upper polarizer is provided with a transparent protective layer, to improve the service life of touch screen.

Description of drawings

Fig. 1 is a structural schematic diagram of an ultra-thin touch-screen liquid crystal display of the present invention.

Fig. 2 is a circuit diagram of the silver paste of the capacitive touch screen of the ultra-thin touch screen liquid crystal display of the present invention.

Fig. 3 is a schematic diagram of the connection relationship of the capacitive touch screen of the ultra-thin touch screen liquid crystal display of the present invention.

Detailed ways

Below through specific embodiment and in conjunction with accompanying drawing, the utility model is further described.

Please refer to Figures 1 to 3, the utility model relates to an ultra-thin touch screen liquid crystal display, including a liquid crystal box surrounded by a first substrate 20, a second substrate 10, and a frame glue 30, and also includes a liquid crystal box integrated on the display side of the liquid crystal box The touch screen device used to form the coordinates of the touch point on the surface of the first substrate 20 is connected to the control circuit 70 of the touch screen device for judging the coordinates of the touch point. The touch screen device used in the utility model utilizes the upper surface of the first substrate 20 of the liquid crystal cell as the substrate of the touch screen device, thereby integrating the touch screen device on the liquid crystal display to reduce the thickness of the liquid crystal display module with a touch screen.

As the first embodiment of the touch screen device of the present invention, the touch screen device can adopt a resistive touch screen device, including an upper electrode layer, a lower electrode layer, and a spacer separating the upper electrode layer and the lower electrode layer, and the lower electrode layer integrated on the first substrate.

As a second embodiment of the touch screen device of the present utility model, the touch screen device may be a capacitive touch screen device, which includes a touch screen working surface covering the surface of the first substrate and electrode lines drawn from the working surface. The following specific embodiments are described in detail by taking a capacitive touch screen device as an example.

Specifically, liquid crystals 32 are accommodated in the liquid crystal cell. The surface of the first substrate 20 is integrated with a touch screen device, and a pixel electrode 22 is arranged inside.

The second substrate 10 is provided with a scanning electrode 12 on a side facing the pixel electrode 22, and the pixel electrode 22 and the scanning electrode 12 display image information under the control of the processor.

In this embodiment, the touch screen device includes a touch screen working surface 46 covering the upper surface of the first substrate 20 and several electrode lines 41 - 44 drawn out from the working surface 46 . Since the capacitive touch screen has a single-layer substrate structure, the present invention integrates the single-layer touch screen onto the surface of the first substrate 20 .

The principle of the capacitive touch screen is as follows: four electrode wires 41-44 are drawn from the four corners of the working surface 46. When the human body touches the working surface 46 of the touch screen, a coupling capacitance is generated between the human body and the working surface 46. When the AC signal is used, the capacitor conducts to the AC signal, so that the human body absorbs a small current from the touch screen. This current has current components on the electrode lines at the four corners. Since the current is proportional to the resistance, the resistance of the touch point It is proportional to the distance from the touch point to the four corners, so the current is proportional to the distance from the touch point to the four corners. The control circuit 70 judges the current of the four electrodes to determine the position of the touch point.

In this embodiment, four electrode wires 41 - 44 are respectively led out from the four corners of the working surface 46 , and the electrode wires 41 - 44 are connected to the control circuit 70 through the flexible circuit board 60 . The current of the working surface 46 is proportional to the touch position, and the control circuit 70 judges the magnitude of the current and determines the coordinates of the touch point.

In this embodiment, the electrode wires 41-44 are silk-screened silver paste electrodes, and the flexible circuit board 60 is pressed on the silver paste electrodes.

The first substrate 20 of the present utility model is coated with ITO (Indium Tin Oxide) layer on both sides, wherein the ITO on one side is used as the working surface of the capacitive touch screen, and the ITO on the other side is used as the pixel electrode of the liquid crystal display.

The specific process is as follows: First, a glass substrate with double-sided coated ITO is coated with a process protection film. The process protection mold is used to protect the ITO from scratches during the production process. The glass surface can protect the ITO after drying. When etching the ITO pattern on the bottom surface of the glass substrate, the top surface of the glass substrate is coated with a process protection film, and the bottom surface ITO is etched to form a graphic for LCD display, and then the process protection mold on the top surface is removed. Next, a process protection film is printed on the ITO surface on the bottom surface, and then the ITO on the top surface of the glass substrate is etched to form electrodes for the touch screen, and finally the process protection film on the bottom surface is removed to complete the ITO pattern making of the first substrate 20 .

After the pattern making of the first substrate 20 is completed, the conductive silver paste used as the electrode lines 41 - 44 is screen-printed on the side of the touch screen working surface 46 on the first substrate 20 .

A layer of transparent insulating ink 48 is provided on the surface of the silver paste electrode lines 41-44 and the working surface 46 of the capacitive touch screen, so as to protect the ITO working surface 46 and insulate the silver paste electrode lines 41-44 from the outside world. In this embodiment, the insulating ink needs to be transparent and have good uniformity, and the surface after silk screen printing should be smooth and even.

The surface of the insulating ink 48 is coated with an upper polarizer 52 , and the outer side of the second substrate 10 is coated with a lower polarizer 50 , through the polarization of the polarizers 50 and 52 on the first substrate 20 and the second substrate 10 Make the LCD display work properly. The upper polarizer 52 is directly pasted on the insulating ink 48 , and no air bubbles can exist between the polarizer 52 and the insulating ink 48 .

A transparent protective layer 54 is disposed on the surface of the upper polarizer 52 .

Although the preferred embodiment of the present invention has been described in detail above, it should be understood that many variations and modifications of the basic inventive concept that are obvious to those skilled in the art fall within the scope of the appended claims. within the spirit and scope of the invention.

Claims (9)

1. ultra-thin touch screen LCD, comprise the liquid crystal cell that surrounds by first substrate, second substrate and frame adhesive, it is characterized in that: comprise that also being incorporated into being used on first substrate that liquid crystal cell shows a side forms the touch panel device of touch point coordinate and the control circuit that connects the judgement touch point coordinate of touch panel device.

2. ultra-thin touch screen LCD according to claim 1 is characterized in that: described touch panel device adopts the capacitance touch screen device, comprises touch-screen workplace that covers first substrate surface and the electrode wires of drawing from workplace.

3. ultra-thin touch screen LCD according to claim 1, it is characterized in that: described touch panel device adopts the resistive touch screen device, comprise upper electrode layer, lower electrode layer and the interval body of separating upper electrode layer and lower electrode layer, described lower electrode layer is incorporated on described first substrate.

4. ultra-thin touch screen LCD according to claim 2, it is characterized in that: draw four electrode wires respectively from four jiaos of described workplace, described electrode wires connects described control circuit by soft-circuit board, touch point on the described workplace and the proportional relation of the electric current of electrode wires are judged size of current and definite touch point coordinate by control circuit.

5. ultra-thin touch screen LCD according to claim 4 is characterized in that: described electrode wires is the ag paste electrode of silk-screen, and described soft-circuit board is pressed together on the ag paste electrode.

6. ultra-thin touch screen LCD according to claim 5 is characterized in that: described workplace and electrode wires surface are provided with the dielectric ink of layer of transparent.

7. ultra-thin touch screen LCD according to claim 6 is characterized in that: described dielectric ink surface is covered with Polarizer.

8. ultra-thin touch screen LCD according to claim 7 is characterized in that: described surface of going up Polarizer is provided with a transparent protective seam.

9. according to any described ultra-thin touch screen LCD of claim 1-8, it is characterized in that: accommodate liquid crystal in the described liquid crystal cell, described first substrate surface is integrated touch panel device, the inboard is provided with pixel electrode, described second substrate is being provided with scan electrode in the face of pixel electrode one side, and described pixel electrode and scan electrode be displays image information under the control of processor.

Images