CN1410875A - Flat panel display with touch controls - Google Patents

Abstract

A flat panel display with touch control function comprises a flat panel display body and a touch sensing layer, wherein the output of the touch sensing layer is connected with an identification circuit. Wherein the touch sensing layer is arranged behind the flat panel display. The electromagnetic induction antenna layer of the touch induction layer is an electromagnetic induction antenna array with a U-shaped antenna cross arrangement structure distributed along an axis X, Y respectively, and can be an electromagnetic induction circuit formed by printing and corroding a printed circuit board, and can also be an electromagnetic induction circuit printed by silver paste or a mixture of the silver paste and carbon paste. The electromagnetic induction circuit is a structure of a single-sided or double-sided printed circuit, and can also be a structure of superposing more than one single-sided printed circuit. An insulation shielding isolation layer is arranged behind the touch sensing layer, and an identification circuit layer is arranged behind the insulation shielding isolation layer. The invention has the advantages of simple manufacturing process, low cost, high precision and long service life.

Description

Flat panel display with touch controls

technical field

The invention relates to a touch screen, in particular to a flat panel display with an electromagnetic induction touch control function. It belongs to the technical field of electronic appliances.

Background technique

With the wide popularization and application of computer technology, the electronic and digital channels of information are becoming more and more abundant. People use various peripherals of computers to invent various methods to complete the initial digitization process of information processing. For example: various keyboard input methods, voice input, image acquisition, etc., among which the most effective and convenient one is to directly input information and command by touching and clicking on the display. Such as, when utilizing computer drawing drawing, because utilize mouse operation can't really be as flexible as the operation that people use pen to draw on paper, and hinder people to complete exquisite pattern making skillfully all the time. Using a touch screen, using the touch control pen to directly operate on the display, the action is like drawing on paper, so the whole work is very easy to complete and the effect is good. Moreover, with the continuous release of portable products, various peripherals such as keyboards and mice are omitted one by one. For example, PDA basically does not have the control of buttons, but all use the touch control pen to operate the touch screen to complete various operations.

Today's touch panels mainly use resistive methods. Its specific structure is that a transparent touch film is provided on the outside of the display, and a resistive layer is coated on the surface of the touch film. When the operation clicks on a specific position of the touch film, the subsequent identification control circuit can know the change of the potential of the position through calculation. Determine the location coordinates of the click, so as to perform the corresponding operation. Due to the problems of high cost, complicated process, and unsuitable for handwriting input in the precision of the existing resistive touch panel when realizing a large-size touch panel, as well as physical damage such as wear and tear due to repeated external operations, the service life of the touch film is relatively long. Problems such as short, greatly limit the application of the touch screen.

Contents of the invention

The object of the present invention is to overcome various disadvantages of the above technologies, and provide a flat panel display with touch control function, which has simple manufacturing process, low cost, high precision and long service life.

The object of the present invention is achieved as follows: a flat panel display with touch control function, which includes a flat panel display body and a touch sensing layer, and the output of the touch sensing layer is connected with an identification circuit. Wherein the touch sensing layer is arranged behind the flat panel display. The display is a flat-panel display such as a plasma display or a liquid crystal display.

The area of the touch sensing layer and the area of the flat panel display. According to different needs, for example, when the display is partially used as a touch input or touch operation area, the area of the touch sensing layer can be smaller than the area of the flat panel display, and it can be arranged on the side behind the flat panel display, or on both sides or around the display. . Of course, the area of the touch sensing layer can also be larger than the area of the flat panel display, so that the entire display and the periphery of the display can have touch capability.

Specifically, the touch sensing layer is an electromagnetic induction antenna layer, and the display isolates the manipulation pen from the sensing layer without affecting the generation and transmission of sensing signals.

The electromagnetic induction antenna layer is an electromagnetic induction antenna array that is distributed along the X and Y axes and has a "U"-shaped antenna cross-arrangement structure.

The electromagnetic induction antenna array of the electromagnetic induction antenna layer is an electromagnetic induction circuit formed by printing and corroding a printed circuit board. In order to reduce costs, the electromagnetic induction antenna array is an electromagnetic induction circuit printed with silver paste or a mixture of silver paste and carbon paste.

The electromagnetic induction circuit is a single-sided or double-sided printed circuit structure, and can also be stacked with more than one single-sided printed circuit.

In order to centrally arrange the overall sensing device, an insulating shielding isolation layer is arranged behind the touch sensing layer, and an identification circuit layer is arranged behind the insulating shielding isolation.

A space gap is provided between the insulation shield isolation and the identification circuit layer, which can further ensure the shielding effect.

Furthermore, in order to improve the anti-abrasion capabilities of the display surface, a transparent protective layer or protective film is provided on the front of the display.

According to the foregoing technical scheme, the present invention has the following advantages:

1. Since the electromagnetic induction layer is arranged behind the display, it is easy to manufacture and the cost is low.

And the larger the area, the more prominent the cost advantage over existing technologies.

2. Since the electromagnetic induction array antenna is used as the identification induction device, its identification accuracy is high,

Ability to accurately input mouse information or handwriting information through strokes or hand touches.

3. The signal is generated through the electromagnetic induction layer located behind the display. As a touch screen, the display

The surface of the display is equipped with a protective film, which is not easy to cause physical damage, and therefore has a long service life.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the present invention;

Fig. 2 is a structural schematic diagram of another embodiment of the present invention;

Fig. 3 is the structural representation of identification circuit of the present invention;

Fig. 4 is a schematic diagram of the structure of the electromagnetic induction layer of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to FIG. 1 , the present invention is a flat-panel display with touch control function, which includes a flat-panel display body and a touch sensing layer. The output of the touch sensing layer is connected to an identification circuit. Any one of the existing writing board identification circuits can be used for the identification circuit, so the present invention will not repeat the identification circuit here. The display is a flat-panel display such as a plasma display or a liquid crystal display.

The flat panel display body includes a front case 1 , a back case 7 and a display 3 . The feature of the present invention is that the touch sensing layer 4 is arranged behind the display 3, and after the electromagnetic handwriting control pen touches the display 3, the touch sensing layer 4 can still sense the position touched by the handwriting pad through the display.

In specific structural design, the area of the touch sensing layer 4 is the same size as the area of the display 3 . An insulating shielding isolation layer 5 is provided behind the touch sensing layer 4 , and an identification circuit layer 6 is provided behind the insulating shielding isolation layer 5 . The insulating and shielding isolation layer 5 is insulated and shielded from the touch sensing layer 4 and the identification circuit layer 6 respectively. Of course, the insulation shielding isolation layer 5 and the identification circuit layer 6 can be additionally arranged in other spaces of the display or the host. The insulating and shielding isolation layer 55 , the identification circuit layer 6 and the touch sensing layer 4 are bonded together so that the whole device can be sensed intensively. In order to further ensure the shielding effect, a space gap is provided between the insulating shielding isolation layer 5 and the identification circuit layer 6 . Of course, if there is a gap between the shielding layer 5 and the touch sensing layer 6 , the insulating effect is already achieved, and the body of the shielding layer 5 may not have an insulating layer.

Furthermore, in order to improve the ability of the wear resistance of the display 3 surface, a transparent protective layer or protective film 2 is provided on the front of the display 3 .

As shown in Figure 2, according to different needs, for example, when the display 3 is partially used as a touch input or touch operation area, the area of the touch sensing layer 4 can be smaller than the area of the display 3, and it can also be arranged on the side behind the display 3. It is arranged on both sides or surroundings of the display 3 . Of course, the area of the touch sensing layer 4 can also be larger than the area of the display 3 , so that the entire display 3 and the periphery of the display 3 can have touch capability.

The touch sensing layer 4 of the present invention is an electromagnetic induction antenna layer, and the display isolates the control pen from the sensing layer without affecting the generation and transmission of sensing signals. Just as the insulating protective film of the tablet separates the stylus from the sensing layer, the working mechanism is the same as the signal generation of the tablet. In use, the electromagnetic signal source of the induction is the electromagnetic control pen. The electromagnetic handwriting control pen continuously emits fixed frequency or data electromagnetic signals when the pen tip is pressed. The electromagnetic signal is sensed by the horizontal antenna on the bottom layer and the vertical antenna on the top layer nearby, and transmitted to the CPU through the identification circuit interface. The CPU calculates and compares the position, voltage intensity, and frequency signal changes of the sensing antenna, and determines the position and various working states of the electromagnetic signal source. Then transfer the result to the PC, so as to control the PC to complete various action instructions. Such as text or shape recognition, drawing and shortcut key calling, etc.

Specifically, as shown in FIG. 4 , the electromagnetic induction antenna layer is an electromagnetic induction antenna array that is distributed along the X and Y axes and has a "U"-shaped antenna cross-arranged structure.

The electromagnetic induction antenna array of the electromagnetic induction antenna layer 4 is an electromagnetic induction circuit formed by printing and corroding a printed circuit board. In order to reduce costs, the electromagnetic induction antenna array is an electromagnetic induction circuit printed with silver paste or a mixture of silver paste and carbon paste.

The electromagnetic induction circuit is a single-sided or double-sided printed circuit structure, and can also be stacked with more than one single-sided printed circuit.

The present invention can be widely applied to various touch control devices. Simultaneously, the idea of the present invention is not limited to the combination of the electromagnetic induction layer and the display of the flat panel. The rear parts of non-CRT displays such as plasma displays and liquid crystal displays with various shapes that are not flat can be combined with the electromagnetic induction layer to realize low-cost touch screen structure.

Claims (19)

1, a kind of flat-panel monitor with touch control function, it comprises flat-panel monitor body and touch-control sensing layer, and the output of touch-control sensing layer is connected to identification circuit, and it is characterized in that: described touch-control sensing layer is arranged on the back of flat-panel monitor.

2, the flat-panel monitor with touch control function according to claim 1 is characterized in that: the area of described touch-control sensing layer and the area of flat-panel monitor.

3, the flat-panel monitor with touch control function according to claim 1, it is characterized in that: the area of described touch-control sensing layer is less than the area of flat-panel monitor.

4, the flat-panel monitor with touch control function according to claim 3 is characterized in that: described touch-control sensing layer is arranged on a side of flat-panel monitor back.

5, the flat-panel monitor with touch control function according to claim 3 is characterized in that: described touch-control sensing layer is arranged on many sides of flat-panel monitor back.

6, the flat-panel monitor with touch control function according to claim 1, it is characterized in that: the area of described touch-control sensing layer is greater than the area of flat-panel monitor.

7, according to the described flat-panel monitor with touch control function of claim 1-6, it is characterized in that: described touch-control sensing layer is the electromagnetic induction antenna stack.

8, the flat-panel monitor with touch control function according to claim 7 is characterized in that: the electromagnetic induction aerial array of described electromagnetic induction antenna stack for distributing along X, Y-axis respectively.

9, the flat-panel monitor with touch control function according to claim 8 is characterized in that: described electromagnetic induction aerial array is " U " shape sky wire antenna intersection layout structure.

10, according to claim 7 or 8 or 9 described flat-panel monitors, it is characterized in that: the electromagnetic induction circuit that the electromagnetic induction aerial array of described electromagnetic induction antenna stack forms for the printing etch for printed circuits bord with touch control function.

11, the flat-panel monitor with touch control function according to claim 10 is characterized in that: described electromagnetic induction circuit is the structure of single or double printed wire.

12, the flat-panel monitor with touch control function according to claim 10 is characterized in that: the printed wire that described electromagnetic induction circuit is the above single face of a slice is stacked.

13, according to claim 7 or 8 or 9 described flat-panel monitors with touch control function, it is characterized in that: described electromagnetic induction aerial array is silver-colored slurry or the silver-colored electromagnetic induction circuit that prints with the carbon pulp mixture of starching.

14, the flat-panel monitor with touch control function according to claim 13 is characterized in that: described electromagnetic induction circuit is a single or double printed wire structure.

15, the flat-panel monitor with touch control function according to claim 13 is characterized in that: the printed wire that described electromagnetic induction circuit is the above single face of a slice is stacked.

16, according to the described flat-panel monitor with touch control function of claim 1-6, it is characterized in that: the back of described touch-control sensing layer is provided with the insulation shielding separation layer, and insulation shielding is provided with the identification circuit layer after isolating.

17, the flat-panel monitor with touch control function according to claim 16 is characterized in that: be provided with a spatial joint clearance between described insulation shielding isolation and the identification circuit layer.

18, the flat-panel monitor with touch control function according to claim 1 is characterized in that: described display is plasma display or LCD.

19, according to claim 1-6,18 described flat-panel monitors with touch control function, it is characterized in that: the front of described display is provided with protective layer.

Images