CN201477560U

CN201477560U - Capacitive touch screen

Info

Publication number: CN201477560U
Application number: CN2009201341811U
Authority: CN
Inventors: 时翠平; 尹俊
Original assignee: BYD Co Ltd
Current assignee: Shenzhen Holitech Optoelectronics Co Ltd
Priority date: 2009-07-22
Filing date: 2009-07-22
Publication date: 2010-05-19
Anticipated expiration: 2019-07-22

Abstract

The utility model discloses a capacitive touch screen, comprising an upper electrode layer and a lower electrode layer; a shielding layer is insulatedly embedded into at least one layer of the upper electrode layer or the lower electrode layer whose surface pattern is complementary with the shielding layer and is matched with the shielding layer in parallel, in this way, the shielding role is played after hanging or grounding, therefore, the external electromagnetic interference can be avoided to a certain extent, and the touch point detection accuracy of the touch screen is increased.

Description

A kind of capacitive touch screen

[technical field]

The utility model relates to the touch screen technology field, relates in particular to a kind of capacitive touch screen.

[background technology]

The appearance of increasing high-end handheld equipment, promoted the develop rapidly of touch screen technology, existing resistive touch screen can't satisfy the needs of existing electronic equipment, so the development of capacitive touch screen has just had very large space owing to its life-span and application space is limited.

At present, its capacitive touch screen generally has such structure, according to last and generally comprise successively down top dielectric layer 1, on go between electrode layer 2, upper electrode layer 3, insulating medium layer 4, go between electrode layer 5, lower electrode layer 6 and layer dielectric layer 7 down, top dielectric layer 1 wherein, insulating medium layer 4 and layer dielectric layer can be respectively the materials of glass, insulation colloid and glass, also can be the materials of silicon dioxide, glass and silicon dioxide.The upward lead-in wire electrode layer wherein and the electrode layer that goes between down can be the silver slurries of silk-screen, also can be the metals that plates.Such capacitive touch screen exist the reaction time short, the life-span is long, transmittance is high, do not need in addition advantage such as writing pencil, the application on high-end handheld equipment is also more and more wider.But similarly, this capacitive touch screen ubiquity is the interference shielding poor performance to external world, thereby causes the lower shortcoming of its overall performance.

[utility model content]

The utility model provides a kind of shield effectiveness good, the capacitive touch screen that its touch point accuracy of detection is higher at the shortcoming of its shield effectiveness difference in the prior art.

The technical solution of the utility model is: a kind of capacitive touch screen comprises upper electrode layer and lower electrode layer, the screen layer of the embedding of insulation ground and its picture on surface complementation and parallel matched in one deck at least of described upper electrode layer or lower electrode layer.

The utility model is by the mode of insulation ground embedding in one deck at least of described upper electrode layer or lower electrode layer with the screen layer of its picture on surface complementation and parallel matched, after unsettled or ground connection, play the effect of shielding, thereby can avoid outside electromagnetic interference to a certain extent, thereby improve the touch point accuracy of detection of touch-screen.

Feature of the present utility model and advantage will be elaborated in conjunction with Figure of description by embodiment.

[description of drawings]

The structural representation of a kind of embodiment of capacitive touch screen that Fig. 1 provides for the utility model;

The lower electrode layer orthogonal projection synoptic diagram of a kind of embodiment of capacitive touch screen that Fig. 2 provides for the utility model;

The upper electrode layer orthogonal projection synoptic diagram of a kind of embodiment of capacitive touch screen that Fig. 3 provides for the utility model;

Fig. 4 makes up the orthogonal projection synoptic diagram for upper electrode layer and the lower electrode layer of a kind of embodiment of capacitive touch screen that the utility model provides;

The following screen layer orthogonal projection synoptic diagram of a kind of embodiment of capacitive touch screen that Fig. 5 provides for the utility model;

The following screen layer of a kind of embodiment of capacitive touch screen that Fig. 6 provides for the utility model and the combination orthogonal projection synoptic diagram of lower electrode layer;

The upper shielding layer orthogonal projection synoptic diagram of a kind of embodiment of capacitive touch screen that Fig. 7 provides for the utility model;

The upper shielding layer of a kind of embodiment of capacitive touch screen that Fig. 8 provides for the utility model and the combination orthogonal projection synoptic diagram of upper electrode layer.

[embodiment]

In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

As shown in Figure 1, a kind of capacitive touch screen that the utility model provides comprises upper electrode layer 3 and lower electrode layer 6, the screen layer of the embedding of insulation ground and its picture on surface complementation and parallel matched in one deck at least of described upper electrode layer 3 or lower electrode layer 6.More preferably, insulation ground embeds the upper shielding layer 8 of array pattern complementation surperficial with it and parallel matched in described upper electrode layer 3, embeds to insulation the following screen layer 9 with its picture on surface complementation and parallel matched in described lower electrode layer 6.

With reference to Fig. 2 and Fig. 3, the lower electrode layer 6 orthogonal projection synoptic diagram of a kind of embodiment of capacitive touch screen that Fig. 2 provides for the utility model, the upper electrode layer 3 orthogonal projection synoptic diagram of a kind of embodiment of capacitive touch screen that Fig. 3 provides for the utility model, the picture on surface of described upper electrode layer 3 and lower electrode layer 6 is the regular figure array.The picture on surface of described upper electrode layer 3 or lower electrode layer 6 can be octagon array, rhombus array, regular hexagon array or square array.In an embodiment of the present utility model, described upper electrode layer 3 and lower electrode layer 6, its single conductive electrode direction is complementary quadrature, promptly in described upper electrode layer 3, has vertical or horizontal conductive electrode 30, having laterally in described lower electrode layer 6 or conductive electrode 60 longitudinally, is orthogonality relation between its conductive electrode.And the single conductive electrode of upper electrode layer 3 or lower electrode layer 6 has been designed to have regular figure and has arranged the shape that forms, with reference to Fig. 2, the single conductive electrode 60 of for example described lower electrode layer 6 is by a plurality of octagon 61 transversely arranged forming, and has certain space, interval between two single conductive electrodes, and it also has the shape of a certain rule at interval, for example can be for arranging the shape that forms by a plurality of squares 62, in the case, the single conductive electrode 30 of described upper electrode layer 3 is longitudinally formed by a plurality of squares 31, and has certain space, interval between two single conductive electrodes 30, and it also has the shape of a certain rule at interval, for example can be for arranging the shape that forms by a plurality of regular hexagons 32, complementation coupling is carried out in the space, interval of the square 62 in the vertical single conductive electrode 30 of each bar of described upper electrode layer 3 and the lower electrode layer 6, and a plurality of regular hexagons 32 that are of described upper electrode layer 3 are arranged and formed carrying out complementation by a plurality of octagon 61 transversely arranged a plurality of single conductive electrodes 60 and mating of spaces and described lower electrode layers 6 at interval.For this partial content; this technical field those of ordinary skill is not difficult to learn by reading above said content; complementation and quadrature matching relationship for upper electrode layer 3 and lower electrode layer 6 also have many concrete embodiments; here point out one by one, but all be contained within the protection domain of the present utility model.

With reference to Fig. 2 and Fig. 3, according to a kind of preferred embodiment of the present utility model, described upper electrode layer 3 is last ITO electrod-array layer, and described lower electrode layer 6 is following ITO electrod-array layer.

With reference to Fig. 5, Fig. 6, Fig. 7 and Fig. 8, the following screen layer 9 orthogonal projection synoptic diagram of a kind of embodiment of capacitive touch screen that Fig. 5 provides for the utility model, the following screen layer 9 of a kind of embodiment of capacitive touch screen that Fig. 6 provides for the utility model and the combination orthogonal projection synoptic diagram of lower electrode layer 6, the upper shielding layer 8 of a kind of embodiment of capacitive touch screen that the upper shielding layer 8 orthogonal projection synoptic diagram of a kind of embodiment of capacitive touch screen that Fig. 7 provides for the utility model, Fig. 8 provide for the utility model and the combination orthogonal projection synoptic diagram of upper electrode layer 3.At first, contrast Fig. 5 and Fig. 2, narrate the matching relationship of described screen layer 9 down and described lower electrode layer 6.The described picture on surface of screen layer 9 down can be octagon array, rhombus array, regular hexagon array or square array.In an embodiment of the present utility model, described screen layer 9 down, the conductive electrode direction of its picture on surface array and described lower electrode layer 6 is the parallel complementary matching relationship, promptly in described down screen layer 9, have with described upper electrode layer 3 in arrange the single shielding strip 90 of the parallel and complementary coupling in the space, interval that forms by a plurality of squares 91, the shape that also has a certain rule between the described down single shielding strip 90 that screen layer 9 is adjacent in twos, for example can be to arrange the space, interval that forms, make the arranging the space, interval that forms by a plurality of octagons 92 and carry out complementation and mate by the transversely arranged a plurality of single conductive electrode 60 of a plurality of octagon 92 and described screen layer 9 down of described lower electrode layer 6 by a plurality of octagons 92.

Then, with reference to Fig. 3, Fig. 7 and Fig. 8, narrate the matching relationship of described upper shielding layer 8 and described upper electrode layer 3.Wherein, the upper electrode layer 3 orthogonal projection synoptic diagram of a kind of embodiment of capacitive touch screen that Fig. 3 provides for the utility model, the upper shielding layer 8 of a kind of embodiment of capacitive touch screen that the upper shielding layer 8 orthogonal projection synoptic diagram of a kind of embodiment of capacitive touch screen that Fig. 7 provides for the utility model, Fig. 8 provide for the utility model and the combination orthogonal projection synoptic diagram of upper electrode layer 3.Identical with the matching relationship of described screen layer 9 down and lower electrode layer 6 for upper shielding layer 8 with the complementary parallel matched relation of upper electrode layer 3, do not do repetition here and carefully state.

Described upper shielding layer 8 and following screen layer 9 are unsettled or ground connection on electric connection mode, are used for shielding outside electromagnetic interference, can make the transmitance of whole touch screen device more even simultaneously.More preferably, described upper shielding layer 8 is unsettled, and described screen layer 9 down is a ground connection.Under the preferable case, described screen layer is the ITO conductive layer.

In the process of design, generally the area design of described upper electrode layer 3 is become to be less than or equal to the area of lower electrode layer 6, the fundamental purpose of this way is to improve the sensitivity that detects, area size for described upper electrode layer 3 and lower electrode layer 6 can be provided with voluntarily according to the requirement in the specific design process, parameter, does not elaborate here.

The utility model is by the mode of insulation ground embedding in one deck at least of described upper electrode layer 3 or lower electrode layer 6 with the screen layer of its picture on surface complementation and parallel matched, after unsettled or ground connection, play the effect of shielding, thereby can avoid outside electromagnetic interference to a certain extent, thereby improve the touch point accuracy of detection of touch-screen.

The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. a capacitive touch screen comprises upper electrode layer and lower electrode layer, it is characterized in that the screen layer of the embedding of insulation ground and its picture on surface complementation and parallel matched in one deck at least of described upper electrode layer or lower electrode layer.

2. capacitive touch screen according to claim 1 is characterized in that, described upper electrode layer is last ITO electrod-array layer, and described lower electrode layer is following ITO electrod-array layer.

3. capacitive touch screen according to claim 1 is characterized in that, the unsettled or ground connection of described screen layer.

4. capacitive touch screen according to claim 1 is characterized in that, described picture on surface is the regular figure array.

5. capacitive touch screen according to claim 1 is characterized in that, described screen layer is the ITO conductive layer.

6. capacitive touch screen according to claim 1 is characterized in that, the area of described upper electrode layer is less than or equal to the area of lower electrode layer.

7. capacitive touch screen according to claim 1, it is characterized in that, insulation ground embeds the upper shielding layer of array pattern complementation surperficial with it and parallel matched in described upper electrode layer, embeds to insulation the following screen layer with its picture on surface complementation and parallel matched in described lower electrode layer.

8. capacitive touch screen according to claim 1 is characterized in that, the picture on surface complementation of the picture on surface of described upper electrode layer and described lower electrode layer and quadrature coupling.