JP2017004474A - Display with low-reflection capacitive touch panel function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display with a low-reflection capacitive touch panel function that can suppress reflection of light compared with a prior art even when a liquid crystal panel and a touch panel are bonded to each other by using an air gap method.SOLUTION: A display with a low-reflection capacitive touch panel function comprises a liquid crystal panel 2, a curved touch panel 5, and an air layer 6 provided between the panels, and includes a first low-reflection layer 3 provided on a front face of the liquid crystal panel 2, and a second low-reflection layer 4 provided on a back face of the curved touch panel 5. The first low-reflection layer 3 and second low-reflection layer 4 are arranged opposite to each other across the air layer 6.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a low reflection type capacitance type display device with a touch panel function.

  Conventionally, as a method of bonding a touch panel on a liquid crystal panel, there are a so-called air gap method and a direct bonding method (also referred to as an optical carving method or a full lamination method).

  The air gap method is a bonding method in which the liquid crystal panel and the touch panel are bonded only at the peripheral portion, and an air layer is formed between the bonded liquid crystal panel and the touch panel. On the other hand, the direct bonding method is a bonding method in which the entire surface of the liquid crystal panel and the touch panel is bonded, and no air layer is formed between them.

  In the past, the air gap method was mainly used from the viewpoint of ease of reattachment, cost, yield, etc., but in the air gap method, the interface between the touch panel and the air layer, the display panel, and the air There is a problem that light is reflected at the interface with the layer and visibility is lowered.

  By the way, in recent years, since the development of a capacitive touch panel having a curved surface has been desired in the market, the applicant has developed a curved touch panel as described in Patent Document 1. In order to bond this curved touch panel to a liquid crystal panel, the entire surface is bonded to the liquid crystal panel using a base glass 2 having a curved surface 21 as shown in FIG. In this way, a curved capacitive display device with a touch panel function in which contrast is improved by suppressing reflection and refraction of light at each interface can be obtained.

Japanese Patent Laying-Open No. 2015-092422

  However, according to the bonding method as described above, since the liquid crystal panel and the base glass, and the base glass and the touch panel are respectively bonded to the entire surface, if you fail to align and want to reattach, Have difficulty. In particular, since the applicant employs thin glass that bends on the touch panel, the glass breaks when peeled off, so that it cannot be practically reattached, leading to a decrease in yield. .

  The present invention has been made to solve such problems, and is a low-reflection capacitive touch panel that can suppress light reflection, can be easily re-attached, and can improve yield. An object is to provide a display device with a function.

  In order to achieve the above object, a display device with a touch panel function of a low reflection capacitance type of the present invention is a low reflection type capacitance touch panel in which a display panel and a curved front panel are bonded. A display device with a function, comprising an air layer between the display panel and the curved front panel, a first low reflection layer provided on a surface of the display panel, and the curved A second low-reflection layer provided on the back surface of the mold front panel, wherein the first low-reflection layer and the second low-reflection layer are opposed to each other with the air layer interposed therebetween. Features.

  Moreover, you may comprise so that the said 1st low reflection layer and both of the said 2nd low reflection layer, or any one may have the fine concavo-convex structure which consists of a transparent material.

  The front panel may be a thin glass plate with a touch sensor.

  According to the present invention, there is an air layer between the display panel and the curved front panel, the first low-reflection layer provided on the surface of the display panel, and the back surface of the curved front panel. The second low reflection layer is provided, and the first low reflection layer and the second low reflection layer are opposed to each other with an air layer interposed therebetween. For this reason, reflection of light can be suppressed, reattachment can be easily performed, and the yield can be improved.

1 is a cross-sectional view of a display device with a touch panel function of a low reflection capacitance type according to the present invention. The perspective view of FIG. The fragmentary sectional view for demonstrating the structure of a 1st low reflection layer. Sectional drawing of the touch panel shown in FIG. The schematic diagram for demonstrating the structure of the touch sensor part shown in FIG.

  Hereinafter, a mode for carrying out a display device 1 with a touch panel function of a low reflection capacitance type according to an embodiment of the present invention (hereinafter referred to as “display device 1”) will be described with reference to the drawings. 1 is a cross-sectional view taken along the line AA in FIG. 2, and FIG. 3 is a cross-sectional view of the touch panel shown in FIG. 1, but the first low-reflection layer 3, the second low-reflection layer 4, Only the adhesive layer 52 is hatched, and the other portions are not hatched.

  As shown in FIG. 1, the display device 1 includes a liquid crystal panel 2, a first low reflection layer 3, a second low reflection layer 4, and a touch panel 5. Device. The first low reflection layer 3 and the second low reflection layer 4 are opposed to each other through the air layer 6.

  The first low reflection layer 3 is affixed on the surface of the liquid crystal panel 2 by an adhesive such as OCR (UV curable resin) or OCA (optical transparent adhesive sheet), and the second low reflection layer 4 is Attached to the back surface of the touch panel 5 by OCR or OCA.

  As shown in the partial cross-sectional view of FIG. 3, the first low reflection layer 3 is a low reflection type film (sheet) including a base film 31 and a cured resin layer 32.

  The base film 31 is made of a transparent film, and examples of the material include acrylic resins, polycarbonates, styrene resins, polyesters, cellulose resins (such as triacetyl cellulose), polyolefins, and alicyclic polyolefins.

  The cured resin layer 32 is a transparent film made of a cured product of the active energy ray curable resin composition, and has a fine concavo-convex structure formed of a plurality of convex portions 320 on the surface. The active energy ray-curable resin composition contains a polymerizable compound and a polymerization initiator. Examples of the polymerizable compound include monomers, oligomers, and reactive polymers having a radical polymerizable bond and / or a cationic polymerizable bond in the molecule. The active energy ray-curable resin composition may contain a non-reactive polymer and an active energy ray sol-gel reactive composition.

  That is, the first low-reflection layer 3 has a structure in which protrusions (convex portions 320) smaller than the wavelength of visible light 380 to 780 nm are forested, and from the air layer 6 toward the first low-reflection layer 3. A resin film (sheet) having a so-called moth-eye structure that suppresses reflection of light by continuously changing the refractive index.

  In the present embodiment, a film (sheet) having the same structure as that of the first low reflection layer 3 is also used for the second low reflection layer 4, but the first low reflection layer 3 and the second low reflection layer 4 are the same. An AR (Anti Reflection) coat (film) may be used for both or either of the reflective layers 4.

  As shown in FIG. 4, the touch panel 5 is a capacitive touch panel, and includes a touch sensor unit 51 made of bendable glass and a curved cover glass 53, and the touch sensor unit 51 is made of the cover glass 53. The adhesive layer 52 made of OCA or OCR is attached on the back surface.

  As shown in FIG. 5, the touch sensor unit 51 includes a Y electrode glass unit 510 and an X electrode glass unit 520 bonded together by an adhesive layer 530 made of OCA or OCR. (Not shown). Since the thicknesses of the Y electrode glass portion 510 and the X electrode portion 520 are 0.05 mm to 0.2 mm, the Y electrode glass portion 510 and the X electrode portion 520 can be attached in a curved state on the back surface of the curved cover glass 53.

  In addition, the capacitive touch panel has been thinned in recent years, and there are three types according to the position of the touch sensor: an out-cell type, an on-cell type, and an in-cell type, and there is also a form in which the touch sensor is formed on a cover glass. Therefore, the touch panel 5 can be a cover glass on which a touch sensor is formed. In addition, as the structure of the capacitive touch panel, there are various forms if classified in terms of the material, structure, etc., but in the present invention, between the front panel and the front panel, As long as the capacitive touch panel function can be realized, various forms can be applied.

  Moreover, in the said embodiment, although the display panel was demonstrated as a liquid crystal panel, a display panel may be a plasma panel, an organic electroluminescent panel, etc., for example.

  As described above, even if the first low reflection layer 3 and the second low reflection layer 4 are configured to face each other through the air layer 6, even if a display device is manufactured by an air gap method, It becomes possible to suppress reflection of light more than before.

1: Display device (low reflection type capacitance type display device with touch panel function)
2: Liquid crystal panel (display panel)
3: 1st low reflection layer 31: Base film 32: Cured resin layer 320: Convex part 4: 2nd low reflection layer 5: Touch panel 51: Touch sensor part 52: Adhesion layer 510: Y electrode glass part 520: X electrode glass part 530: Adhesive layer 540: FPC
6: Air layer

Claims (3)

It is a display device with a touch panel function of a low reflection type capacitive system formed by laminating a display panel and a curved front panel,
An air layer is provided between the display panel and the curved front panel,
A first low reflection layer provided on the surface of the display panel, and a second low reflection layer provided on the back surface of the curved front panel,
The display device with a touch panel function of a low reflection type capacitive type, wherein the first low reflection layer and the second low reflection layer are opposed to each other through the air layer.   2. The low-reflection type static electricity according to claim 1, wherein either or both of the first low-reflection layer and the second low-reflection layer have a fine concavo-convex structure made of a transparent material. A display device with a capacitive touch panel function. The display device with a touch panel function of the low reflection type capacitive system according to claim 1, wherein the front panel is a thin glass plate with a touch sensor.