KR20170133740A - Touch display apparatus and display unit for vehicle including the apparatus - Google Patents

Abstract

The present invention comprises a touch display apparatus having excellent visibility. The touch display apparatus comprises: a display panel; a touch panel disposed on the display panel and sensing touch; and a plurality of light transmitting adhesive layers disposed between the display panel and the touch panel, wherein the plurality of light transmitting adhesive layers have different refractive indices.

Description

[0001] The present invention relates to a touch display apparatus and a vehicle display unit including the touch display apparatus.

Embodiments relate to a touch display device and a vehicle display unit including the touch display device.

The touch display device refers to a device including a display panel and a touch panel. Here, the display panel serves to provide a screen, such as a liquid crystal display (LCD), and the touch panel is a finger, a stylus pen (or a touch pen) And so on.

Such a touch display device is applied to various electronic display products such as a mobile phone, a notebook or a navigation system, and the demand for its outdoor visibility and image quality characteristics is continuously increasing.

The embodiment provides a touch display device having excellent visibility and a vehicle display unit including the touch display device.

A touch display device according to an embodiment includes a display panel; A touch panel disposed on the display panel and sensing a touch; And a plurality of light-transmitting adhesive layers disposed between the display panel and the touch panel, wherein the plurality of light-transmitting adhesive layers have different refractive indices.

For example, each of the plurality of light-transmitting adhesive layers may include a silicon-based material or an acrylic material.

For example, each of the plurality of light-transmitting adhesive layers may include at least one of an optical transparent resin (OCR), an optical transparent adhesive (OCA), or a liquid optical transparent adhesive (LOCA).

For example, the display panel may include a liquid crystal display (LCD) panel, an organic light emitting diode (OLED) panel, a plasma display panel (PDP) panel, an electroluminescence (EL) panel, or a cathode ray tube have.

For example, the display panel may include a backlight unit; And a liquid crystal panel disposed between the backlight unit and the plurality of light-transmitting adhesive layers, for receiving light emitted from the backlight unit and implementing an image.

For example, the liquid crystal panel may include a thin film transistor array substrate disposed on the backlight unit; A color filter array substrate disposed on the thin film transistor array substrate; And a liquid crystal layer filled between the thin film transistor substrate and the color filter array substrate. The liquid crystal panel may further include: a lower polarizer disposed between the backlight unit and the thin film transistor array substrate to polarize light incident from the backlight unit to the liquid crystal layer; And an upper polarizer disposed on the color filter array substrate for polarizing light transmitted from the liquid crystal layer.

For example, the touch display device may further include a substrate disposed on the touch panel. The substrate may comprise at least one of a tempered glass, a reinforced coating film, an LCD glass or a plastic substrate for a flexible panel.

For example, the touch panel may include first and second electrode patterns disposed between the plurality of light-transmitting adhesive layers and the substrate and electrically spaced from each other. The touch panel may further include a space in which the first and second electrode patterns are spaced apart from each other and a high-refraction oxide layer disposed under the first and second electrode patterns. Wherein the touch panel comprises: an insulating layer disposed between the first and second electrode patterns and the substrate; And a pattern cover layer disposed between the insulating layer and the substrate.

For example, the touch display apparatus may further include a function plate disposed on the substrate.

For example, the functional plate may include a anti-glare layer disposed on the substrate; An antireflection layer disposed on the anti-glare layer; Or an anti-finger layer disposed on the anti-reflection layer.

The vehicle display unit according to another embodiment includes the touch display device; And a controller for controlling the operation of the touch display device.

The touch display device according to the embodiment and the vehicle display unit including the touch display device have lower reflectance than the touch display device according to the comparative example to provide high visibility and have a low brightness index, Can be improved.

1 is a cross-sectional view of a touch display device according to an embodiment.
Fig. 2 shows a cross-sectional view of one embodiment of the display panel shown in Fig.
FIG. 3 is a cross-sectional view of the touch panel shown in FIG. 1 according to an embodiment of the present invention.
Fig. 4 shows a cross-sectional view of one embodiment of the plurality of light-transmitting adhesive layers shown in Fig.
Fig. 5 shows a cross-sectional view of another embodiment of the plurality of light-transmitting adhesive layers shown in Fig.
6 is a cross-sectional view of another embodiment of the plurality of light-transmitting adhesive layers shown in Fig.
7 shows a cross-sectional view of one embodiment of the functional plate shown in Fig.
8 is a cross-sectional view of an embodiment of the touch display device shown in Fig.
9 is a view exemplarily showing an appearance of a display unit for a vehicle according to an embodiment including a touch display device.
Fig. 10 shows a schematic block diagram of a vehicle display unit according to the embodiment.
11 shows a block diagram according to an embodiment of the CID shown in FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to facilitate understanding of the present invention. However, the embodiments according to the present invention can be modified into various other forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. Embodiments of the invention are provided to more fully describe the present invention to those skilled in the art.

In the description of the present embodiment, in the case of being described as being formed "on or under" of each element, the upper (upper) or lower (lower) on or under includes both the two elements being directly in contact with each other or one or more other elements being indirectly formed between the two elements.

Also, when expressed as "on" or "on or under", it may include not only an upward direction but also a downward direction with respect to one element.

It is also to be understood that the terms "first" and "second," "upper / upper / upper," and "lower / lower / lower" But may be used to distinguish one entity or element from another entity or element, without necessarily requiring or implying an order.

The touch display devices 100 and 100A according to the embodiment include a display panel 110 and a touch panel 120. The display panel 110 and the touch panel 120 are connected to a plurality of transparent adhesive layers 130, As shown in FIG.

In addition, although the touch display apparatus 100 according to the embodiment is described using a Cartesian coordinate system, it is needless to say that the touch display apparatus 100 may be described using another coordinate system. In the Cartesian coordinate system, the x-axis, the y-axis and the z-axis shown in each figure are orthogonal to each other, but the embodiment is not limited thereto. The x-axis, the y-axis, and the z-axis may intersect with each other.

1 is a cross-sectional view of a touch display device 100 according to an embodiment.

Referring to FIG. 1, a touch display device 100 according to an embodiment includes a display panel 110, a touch panel 120, a plurality of light-blocking adhesive layers 130, a substrate 140, And may include a functional plate 150.

The display panel 110 serves to provide an image. For example, the display panel 110 includes a liquid crystal display (LCD) panel, an organic light emitting diode (OLED) panel, a plasma display panel (PDP) panel, an electroluminescence (EL) panel, or a cathode ray tube The embodiment is not limited to a specific form of the display panel 110. However,

Hereinafter, when the display panel 110 shown in FIG. 1 is an LCD panel, an embodiment 110A of the display panel 110 will be described as follows.

FIG. 2 shows a cross-sectional view of one embodiment 110A of the display panel 110 shown in FIG.

Referring to FIG. 2, the display panel 110A may include a backlight unit (BLU) 112 and a liquid crystal panel 114.

The backlight unit 112 may include a light source (not shown), a light guide plate (or air gap) (not shown), a reflective sheet (not shown), a diffusion sheet (not shown), and a prism sheet have. The light guide plate converts the light source coming from the light source into the surface light source. The reflective sheet is disposed downward in the backlight unit 112 and reflects upwardly emitted light. The diffusion sheet diffuses the light of the light guide plate. A prism sheet functions to gather light at a certain angle. Since the liquid crystal panel 114 can not emit light by itself, the display panel 110A as shown in FIG. 2 may include the backlight unit 112. FIG.

The liquid crystal panel 114 is disposed between the backlight unit 112 and a plurality of transparent adhesive layers 130 to receive light emitted from the backlight unit 112 and to implement an image. The liquid crystal panel 114 can display an image using a liquid crystal cell whose light transmittance is adjusted according to an electric field.

For example, the liquid crystal panel 114 includes a thin film transistor array (TFTA) substrate 114-1, a color filter array (CFA) substrate 114-2, a liquid crystal layer 114- 3, a lower polarization section 114-4, and an upper polarization section 114-5.

The TFTA substrate 114-1 is disposed on the backlight unit (BLU) 112, and the CFA substrate 114-2 is disposed on the TFTA substrate 114-1. The CFA substrate 114-2 and the TFTA substrate 114-1 can be disposed opposite to each other. The liquid crystal layer 114-3 is filled between the TFTA substrate 114-1 and the CFA substrate 114-2.

The lower polarized portion 114-4 is disposed between the backlight unit (BLU) 112 and the TFTA substrate 114-1. The lower polarizing section 114-4 serves to polarize light incident from the backlight unit (BLU) 112 to the liquid crystal layer 114-3. The upper polarizing section 114-5 is disposed between the CFA substrate 114-2 and the plurality of light-projecting bonding layers 130 and serves to polarize the light transmitted to the outside from the liquid crystal layer 114-3.

Each of the lower polarization section 114-4 and the upper polarization section 114-5 divides the light incident on the lower polarization section 114-4 and the upper polarization section 114-5 into two polarization components orthogonal to each other, And absorbs or disperses the light in the other direction, thereby making light that oscillates only in a specific direction.

For example, the material of each of the lower and upper polarizing portions 114-4 and 114-5 may be triacetylcellulose (TAC), but the embodiment is not limited thereto.

The liquid crystal panel 114 having the above-described structure determines whether or not the electric field of the liquid crystal layer 114-3 corresponding to each pixel is applied through the TFTA substrate 114-1 and controls the electric field applied to the liquid crystal layer 114-3 The brightness can be adjusted by adjusting the degree of transmission of the light incident from the backlight unit (BLU) The liquid crystal panel 114 may be driven by a TN (twisted nematic) method or a transverse electric field method, but the embodiment is not limited to the driving mode of the liquid crystal panel 114.

Referring again to FIG. 1, the touch panel 120 is disposed on the display panel 110 to sense the touch of the touch display device 100.

A personal computer, a portable communication device, or other personal-purpose information processing device generally has an interface with a user by using various input devices such as a keyboard, a mouse, and a digitizer. However, as the development of mobile communication equipments is expanded, it is difficult to improve the completeness of the product with an input device such as a keyboard and a mouse, so that it is simpler and can reduce a malfunction and a demand for a portable input device is increased have. In response to this demand, a touch panel has been proposed in which a user directly touches the screen with a hand or a pen to input information.

In this touch panel 120, a metal electrode is formed on a top plate or a bottom plate according to a method of sensing a touched portion, and a resistive film type (Resistive a capacitance type in which an equal potential is formed on the conductive film and a position where a voltage change of the upper and lower plates due to the contact is sensed, an LC value derived as the electronic pen touches the conductive film is read, And an electromagnetic induction type (an electro-magnetic type) for sensing the touch panel 120. However, the embodiment is not limited to the specific sensing method of the touch panel 120. [

3 illustrates a cross-sectional view of one embodiment 120A of the touch panel 120 shown in FIG.

Referring to FIG. 3, the touch panel 120A may include an electrode pattern 122, a high-refraction oxide layer 124, an insulating layer 126, and a pattern cover layer 128.

The electrode pattern 122 may include a first electrode pattern 122-1 and a second electrode pattern 122-2. The first electrode pattern 122-1 may include a plurality of laterally spaced x-axis electrodes and the second electrode pattern 122-2 may include a plurality of longitudinally spaced y-axis electrodes. have. The first electrode pattern 122-1 and the second electrode pattern 122-2 are arranged so as to intersect with each other. The first electrode pattern 122-1 and the second electrode pattern 122-2 are arranged to cross each other, A capacitance is generated at the intersection of the two electrodes. Accordingly, the touch panel 120A can sense the touched portion by sensing the position where the capacitance is changed by the contact with the outside.

Each of the first and second electrode patterns 122-1 and 122-2 may be formed of a material having a light-transmitting property and an electrical conductivity. For example, the first and second electrode patterns 122-1 and 122-2 may be implemented using ITO (Indium Tin Oxide), but the embodiment may include the first and second electrode patterns 122-1 and 122-2, 122-2. ≪ / RTI >

The first and second electrode patterns 122-1 and 122-2 are disposed between the plurality of light-blocking adhesive layers 130 and the substrate 140, and may be electrically separated from each other. Referring to FIGS. 1 and 3, although the first and second electrode patterns 122-1 and 122-2 are illustrated as being supported by the substrate 140, the embodiments are not limited thereto.

Alternatively, unlike FIG. 3, according to another embodiment, the first and second electrode patterns 122-1 and 122-2 may be formed of a separate transparent substrate (not shown) instead of being supported by the substrate 140 As shown in Fig. For example, the first and second electrode patterns 122-1 and 122-2 may be disposed on the upper and lower surfaces of the transparent substrate, respectively, and the first and second electrodes 122-1 and 122-2 may be disposed on the same surface of the transparent substrate, The patterns 122-1 and 122-2 may be disposed apart from each other. Alternatively, the transparent substrate supporting the first electrode pattern 122-1 and the transparent substrate supporting the second electrode pattern 122-2 may be provided separately.

The transparent substrate may include at least one of a transparent PI film, a polyethylene naphthalate (PEN) film, a polyethylene terephthalate film, a PC (Polycarbonate) film, or a PSS (Poly Styrene Sulfonate) A transparent film may be used, or a film capable of being reinforced by a synthetic resin film may be used.

The high refractive index oxide layer 124 may be disposed in a space where the first and second electrode patterns 122-1 and 122-2 are spaced apart from each other and below the first and second electrode patterns 122-1 and 122-2 have. The high refractive index oxide layer 124 is disposed in a space where the first and second electrode patterns 122-1 and 122-2 are spaced from each other so that the first and second electrode patterns 122-1 and 122-2 are electrically separated from each other Isolation). In addition, the high refractive index oxide layer 124 may also serve to lower the reflectivity.

For example, the high refractive index oxide layer 124 may comprise at least one of Al ₂ O ₃ , TiO _2, or ZrO ₂ , but embodiments are not limited to any particular material of the high refractive index oxide layer 124.

In some cases, the high refractive index oxide layer 124 may be omitted, in which case the insulating material instead of the high refractive index oxide layer 124 is formed by the first and second electrode patterns 122-1 and 122-2, They may be disposed in the space to electrically isolate these electrodes 122-1 and 122-2 from each other.

In addition, the insulating layer 126 may be disposed between the first and second electrode patterns 122 (122-1, 122-2) and the substrate 140. For example, the insulating layer 126 may comprise an insulating material, for example, SiO ₂ , although embodiments are not limited to any particular material of the insulating layer 126. In some cases, the insulating layer 126 may be omitted.

The pattern cover layer 128 may be disposed between the insulating layer 126 and the substrate 140 to hide the first and second electrode patterns 122-1 and 122-2 from being exposed to the outside have. As described above, the pattern cover layer 128 can be formed of any material as long as it has a light transmitting property and can hide the first and second electrode patterns 122-1 and 122-2 from being exposed to the outside. For example, the pattern cover layer 128 may comprise Nb ₂ O ₅ , but the embodiment is not limited to the particular material of the pattern cover layer 128.

The first and second electrode patterns 122-1 and 122-2 may have a fine width, for example, 15 mu m or less, but may be seen from the outside of the touch display device 100. [ Therefore, when the pattern cover layer 128 is disposed, the first and second electrode patterns 122-1 and 122-2 can be hidden from the outside. Optionally, the pattern cover layer 128 may be omitted.

1, the substrate 140 is disposed on the touch panel 120 and covers and protects the screen generated by the display panel 110. Referring to FIG. That is, the substrate 140 can prevent the touch panel 120 from being damaged due to collision with the outside. In addition, as described above, the substrate 140 can also support the first and second electrode patterns 122-1 and 122-2.

The substrate 140 may be implemented in the form of at least one of glass, plastic, or film.

For example, the substrate 140 may comprise at least one of a tempered glass, a reinforced coating film, an LCD glass, or a plastic substrate for a flexible panel, although embodiments are not limited to any particular type of substrate 140.

For example, the substrate 140 can be realized by tempered glass manufactured by heating the plate glass to a temperature close to the softening temperature, compressively deforming the glass surface portion by quenching with compressed cooling air, and tensile deforming the inside. Such a tempered glass has higher bending strength, impact resistance and heat resistance than ordinary glass.

In addition, the substrate 140 may be embodied as a reinforced coating film produced by forming a reinforcing coating layer that increases the hardness on the surface of the film substrate.

The plurality of light-transmitting adhesive layers 130 shown in FIG. 1 are disposed between the display panel 110 and the touch panel 120 to adhere the display panel 110 and the touch panel 120 to each other.

According to the embodiment, the plurality of light-transmitting adhesive layers 130 (130-1 to 130-k) may have different refractive indices. Here, k is a positive integer of 2 or more.

Each of the plurality of light-transmitting adhesive layers 130-1 to 130-k may have a refractive index between 1.3 and 1.7, but the embodiment is not limited to a specific refractive index of the plurality of light-transmitting adhesive layers 130-1 to 130-k.

If the total thickness T of the plurality of light-transmitting adhesive layers 130 is less than 300 μm, it may be difficult to bond the display panel 110 and the touch panel 120, and a plurality of light-transmitting adhesive layers 130-1 to 130-k ) May be difficult to realize in a laminated form. If the total thickness T of the plurality of light-transmitting adhesive layers 130 is larger than 400 占 퐉, air may be unnecessarily thick due to the plurality of light-transmitting adhesive layers 130, Light may be absorbed by the plurality of light-transmitting adhesive layers 130. [ Therefore, although the total thickness T of the plurality of light-transmitting adhesive layers 130 may be between 300 μm and 400 μm, preferably 350 μm, the embodiment is limited to the specific total thickness T of the plurality of light-transmitting adhesive layers 130 It does not.

The plurality of light-transmitting adhesive layers 130 may have a thickness of 300 to 400 占 퐉, irrespective of the number of the light-transmitting adhesive layers 130-1 to 130-k and the thickness of the light-transmitting adhesive layers 130-1 to 130- And may have a total thickness (T).

In addition, although the plurality of light-transmitting adhesive layers 130 may have a size of 330 mm x 140 mm, the embodiment is not limited to a specific size of the plurality of light-transmitting adhesive layers 130. Here, the thickness of the plurality of light-transmitting adhesive layers 130 means the thickness in the z-axis direction, and the size of the plurality of light-transmitting adhesive layers 130 can mean the size of the plane formed by the y-axis and the x-axis.

Each of the plurality of light-transmitting adhesive layers 130 (130-1 to 130-k) may be formed of a material having adhesive (or adhesive) properties and light-transmitting properties. For example, each of the light-transmitting adhesive layers 130-1 to 130-k may be formed of a silicon or acrylic material, and may be a one-pack type or a two-pack type.

Each of the plurality of light-transmitting adhesive layers 130 (130-1 to 130-k) may be formed by using an optical clear resin (OCR) as a double-sided adhesive, an optically clear adhesive (OCA) LOCA: Liquid Optically Clear Adhesive).

In particular, when a plurality of light-transmitting adhesive layers 130 are implemented with OCR, OCA, or LOCA, an air gap between the display panel 110 and the touch panel 120 can be reduced or eliminated, thereby improving visibility. Particularly, according to the embodiment, since a plurality of light-transmitting adhesive layers 130 are realized using a multilayer structure having different refractive indexes by using at least two of OCR, OCA and LOCA, brightness is improved and black feeling is improved, Lt; / RTI > Here, the black sense may mean a degree of blackness of the screen in a state where power is not supplied to the touch display device 100. [

The manufacturing process of each of the light-transmitting adhesive layers 130-1 to 130-k will be described below. However, the embodiment is not limited to a specific manufacturing process of each of the light-transmitting adhesive layers 130-1 to 130-k.

The material for forming the light-transmitting adhesive layer 130-1 can be coated on the display panel 110. [ Alternatively, a material for forming the light-transmitting adhesive layer 130-k may be applied on the touch panel 120. [ At this time, as a method of applying, dispensing, screen printing, or a slit die method may be used.

Thereafter, the applied material is primarily cured. Examples of the curing method include a thermosetting method and a UV curing method. Examples of the lamps used for curing include mercury lamps, metal lamps, gallium lamps, arc lamps, xenon lamps, UV-LED lamps have. At this time, the lamp may be in the form of a bar. For example, the light-transmitting adhesive layer 130-1 or 130-k can be formed by using an ultraviolet curing resin based on a material which is cured in response to ultraviolet rays. In this case, the light-transmitting adhesive layer 130-1 or 130- May have a refractive index between 1.3 and 1.7,

When the light-transmitting adhesive layer 130-1 or 130-k is formed by the UV curing method, the lifetime and the heat can be excellent.

Other light-transmitting adhesive layers 130-2 to 130-k (or 130-1 to 130-k-1) may be formed in the manner as described above.

Alternatively, a plurality of light-transmitting adhesive layers 130-1 to 130-k that are not completely cured may be manufactured in a vacuum state and then protected with a protective film or the like. After the protective film is peeled off, the display panel 110 (or the touch panel After the plurality of light-transmitting adhesive layers 130 applied to the display panel 110 (or the touch panel 120) are cured, the touch panel 120 (or the display panel 120) (Or the touch panel 120) to which the plurality of light-transmitting adhesive layers 130 are applied in a vacuum while facing the display panel 110. At this time, And various measures can be taken to prevent voids or voids.

On the other hand, light is reflected by the plurality of light-transmitting adhesive layers 130 in accordance with at least one of the refractive indices, the thicknesses, and the number k of the plurality of light-transmitting adhesive layers of the plurality of light-transmitting adhesive layers 130-1 to 130- The reflectance may be changed. This will be described later.

FIG. 4 shows a cross-sectional view of an embodiment 130A of the plurality of light-transmitting adhesive layers 130 shown in FIG.

The plurality of light-transmitting adhesive layers 130A shown in FIG. 4 may include first and second light-transmitting adhesive layers 132 and 134.

The first translucent adhesive layer 132 may be disposed on the display panel 110 and the second translucent adhesive layer 134 may be disposed on the first translucent adhesive layer 132. The first refractive index n1 of the first light-transmitting adhesive layer 132 and the second refractive index n2 of the second light-transmitting adhesive layer 134 may be different from each other.

According to one embodiment, the first light-transmitting adhesive layer 132 may have a first refractive index n1 of 1.51 and a first thickness T1 of 100 m. In this case, the second light-transmitting adhesive layer 134 has a second refractive index n2 of 1.41 and can have a second thickness T2 of 250 m.

According to another embodiment, the first light-transmitting adhesive layer 132 may have a first refractive index n1 of 1.57 and a first thickness T1 of 300 m. In this case, the second light-transmitting adhesive layer 134 has a second refractive index n1 of 1.47 and can have a second thickness T2 of 100 m.

Fig. 5 shows a cross-sectional view of another embodiment 130B of the plurality of light-transmitting adhesive layers 130 shown in Fig.

Referring to FIG. 5, the plurality of light-blocking adhesive layers 130B may include first, second, and third light-transmitting adhesive layers 132, 134, and 136. The number of the light-transmitting adhesive layers 130A: 130-1 to 130-k shown in FIG. 4 is two (that is, k = 2) while the number of the light-transmitting adhesive layers 130-1 to 130- -k) are three (i.e., k = 3). That is, the plurality of light-blocking adhesive layers 130B shown in FIG. 5 further includes a third light-blocking adhesive layer 136, unlike the plurality of light-blocking adhesive layers 130A shown in FIG.

5, the third light-transmitting adhesive layer 136 is disposed between the display panel 110 and the first light-transmitting adhesive layer 132. The first light-transmitting adhesive layer 132 is disposed between the third light-transmitting adhesive layer 136 and the second light-transmitting adhesive layer 134 and the second light-transmitting adhesive layer 134 is disposed between the first light-transmitting adhesive layer 132 and the touch panel 120 As shown in FIG.

For example, the first light-transmitting adhesive layer 132 has a first refractive index n1 of 1.51, the second light-transmitting adhesive layer 134 has a second refractive index n2 of 1.41, And a third refractive index n3 of 1.41. In this case, the reflectance may vary depending on the thickness of the first to third light-transmitting adhesive layers 132, 134, and 136. For example, the first to third light-transmitting adhesive layers 132 and 134 (first and second light-transmitting adhesive layers 132 and 134 and 136) may be fixed while the first to third refractive indexes n1, n2 and n3 of the first to third light- 136, 136 may vary as follows.

According to one embodiment, the first thickness T1 of the first light-transmitting adhesive layer 132 is 100 占 퐉, the second thickness T2 of the second light-transmitting adhesive layer 134 is 50 占 퐉, the third light-transmitting adhesive layer 136 ) May be 200 [mu] m.

According to another embodiment, the first thickness T1 of the first light-transmitting adhesive layer 132 is 50 m, the second thickness T2 of the second light-transmitting adhesive layer 134 is 50 m, the thickness of the third light-transmitting adhesive layer 136 ) May be 300 [mu] m.

As shown in FIGS. 4 and 5, the reflectance according to the refractive index and the thickness of the plurality of light-transmitting adhesive layers 130 will be described later.

6 shows a cross-sectional view of a plurality of light-transmitting adhesive layers 130 shown in Fig. 1 by another embodiment 130C.

Referring to Fig. 6, the plurality of light-transmitting adhesive layers 130C may have repeatedly laminated pair structures 138-1 to 138-M. Here, M is a positive integer of 2 or more.

Each of the pair structures 138-1 to 138-M may include a bottom layer 138B-1 to 138B-M and a top layer 138T-1 to 138T-M. That is, the first pair structure 138-1 includes a bottom layer 138B-1 and a top layer 138T-1, and the Mth pair structure 138-M includes a bottom layer 138B-M and a top layer 138T- 138T-M).

Referring again to FIG. 1, the functional plate 150 is disposed on the substrate 140 to perform various functions.

For example, the functional plate 150 may include at least one of an anti-glare (AG) layer, an anti-reflection (AR) layer, or an anti-finger .

The anti-glare (AG) layer serves to prevent glare, the anti-reflection (AR) layer serves to prevent reflection, and the finger protection (AF) 100 to prevent the touch display device 100 from being contaminated.

The touch display device 100 does not necessarily include the function plate 150 and the function plate 150 may be omitted in some cases.

FIG. 7 shows a cross-sectional view of one embodiment 150A of the functional plate 150 shown in FIG.

The substrate 140A shown in FIG. 7 corresponds to the embodiment of the substrate 140 shown in FIG. 1 and performs the same function.

7, functional plate 150A may include anti-glare layer 152, antireflection layer 154, and anti-finger layer 156.

Anti-glare layer 152 may be disposed between substrate 140A and anti-reflective layer 154. [ For example, the anti-glare layer 152 may be implemented by a separate layer disposed between the substrate 140A and the anti-reflective layer 154, although embodiments are not so limited. According to another embodiment, as shown in FIG. 7, the anti-glare layer 152 may be implemented by forming a wavy pattern on the substrate 140A.

The antireflection layer 154 may be disposed on the anti-glare layer 152. The antireflection layer 154 can maximally suppress the reflection of light incident from the outside to the touch display device 100 to enhance the sharpness of the touch display device 100. [ The light that is not prevented from being reflected by the antireflection layer 154 can be prevented from being reflected again by the members disposed below the antireflection layer 154. [

Referring to FIG. 7, the antireflection layer 154 may have a structure in which a plurality of pairs of structures 154-1 to 154-N are repeated. Here, N is a positive integer of 2 or more. Each pair structure 154-1 through 154-N may include a bottom layer 154B-1 through 154B-N and a top layer 154T-1 through 154T-N. Namely, the first pair structure 154-1 includes a bottom layer 154B-1 and a top layer 154T-1, and the Nth pair structure 154-N includes a bottom layer 154B-N and a top layer 154T- 154T-N).

For example, in each pair structure 154-1 through 154-N, the bottom layers 154B-1 through 154B-N are relatively high refractive index layers as compared to the top layers 154T-1 through 154T-N, -1 to 154T-N may be a relatively low refractive index layer as compared to the bottom layers 154B-1 to 154B-N, but the embodiments are not limited thereto. To this end, the server teomcheung (154B-1 to 154B-N) may comprise at least one of a high-refractive index layer as ATO (tin oxide layer doped with antimony), ZrO _2, TiO _2, or ZnS, tapcheung (154T- 1 to 154T-N) can contain SiO ₂ as the low refractive index layer, but embodiments are not limited in this respect.

The functional plate 150A shown in FIG. 7 is illustrated as including both the antiglare layer 152, the antireflection layer 154, and the antifade layer 156, but the embodiment is not limited thereto.

1 may include only the anti-glare layer 152, the anti-reflective layer 154, or the anti-finger layer 156, and may include the anti-glare layer 152 and the anti- Antireflection layer 154 and the finger prevention layer 156 or may include only the anti-glare layer 152 and the finger prevention layer 156. The anti-

The plurality of light-transmitting adhesive layers 130 may include a specific structure of the display panel 110, a specific structure of the touch panel 120, presence or absence of the substrate 140, existence of the function plate 150, But is not limited to a specific form. That is, FIGS. 2, 3, and 7 are merely examples for helping understanding of the plurality of light-transmitting adhesive layers 130. Accordingly, regardless of the structure of the display panel 110 and the touch panel 120, and whether or not at least one of the substrate 140 and the function plate 150 is present, the plurality of light- The touch display device 100 according to the embodiment can be applied.

Hereinafter, the reflection characteristics of the touch display device according to the comparative example and the exemplary embodiment will be described with reference to the accompanying drawings.

Fig. 8 shows a cross-sectional view of an embodiment 100A of the touch display device 100 shown in Fig.

The display panel 110A, the upper polarization section 114-5A, the touch panel 120B, the plurality of light-transparent adhesive layers 130, the substrate 140A, and the function plate 150A shown in Fig. The upper polarizer 114-5, the touch panel 120, the plurality of transparent adhesive layers 130, the substrate 140, and the function plate 150 shown in FIG.

The constituent materials and the refractive indexes of the respective parts shown in FIG. 8 are as follows.

The upper polarizing portion 114-5A of the display panel 110A has a refractive index of 1.5 and each of the plurality of light transmitting adhesive layers 130 is realized by OCR and the refractive index of one of the light transmitting adhesive layers 136 is 1.48 and the other 132 may have a refractive index of 1.41 and the refractive index of the other one 134 may be 1.48.

The refractive index of Al ₂ O ₃ that implements the high refractive index oxide layer 124 is 1.57, the refractive index of ITO that implements the first and second electrode patterns 122 (122-1 and 122-2) is 1.96, The refractive index of SiO ₂ implementing layer 126 is 1.47 and the refractive index of Nb ₂ O ₅ , which implements pattern cover layer 128, may be 2.25.

The substrate 140A is made of glass (glss) and the bottom layers 154B-1 and 154B-2 of the first and second pair structures 154-1 and 154-2 of the antireflection layer 154, , The refractive index of TiO ₂ implementing the top layer 154T-1, 154T-2 may be 1.45, and the refractive index of SiO ₂ implementing the top layer 154T-1, 154T-2 may be 1.45.

The first reflectance R1 on the substrate 140A may be 0.6% and the second reflectance R2 on the plurality of light-transmitting adhesive layers 130 may be 0.6% in the touch display device 100A implemented as shown in Fig. Is 0.4%, and the third reflectance R3 on the upper polarizing portion 114-5A may be 1.1%.

On the other hand, in the touch display device according to the comparative example, in the touch display device 100A according to the embodiment shown in FIG. 8, the light-shielding adhesive layer 130 is divided into a plurality of first to third light-transmitting adhesive layers 130-1 to 130-3, And is realized as a single light-transmitting adhesive layer having a refractive index of 1.41. The first and second reflectances R1 and R2 of the comparative touch display device are the same as those of the touch display device 100A according to the embodiment. The third reflectance R3 is 1.3%, which is 0.2% . As described above, according to the embodiment, the third reflectance R3 is reduced by 0.2% by implementing the light-transmitting adhesive layer 130 as a plurality of light-transmitting adhesive layers 130-1 to 130-3 having different refractive indices rather than a single layer .

That is, the total reflectance (RT) of the first to third reflectances (R1, R2, R3) is 2.3% for the touch display device according to the comparative example, while the touch display device 100A according to the embodiment is 2.1% And it is relatively smaller than the comparative example.

Generally, when the light incident through the first layer proceeds to the second layer, the reflectance at which light is reflected in the second layer can be expressed by the following equation (1).

Here, N1 represents the refractive index of the first layer, N2 represents the refractive index of the second layer, and? N represents the difference value between N1 and N2.

Referring to Equation (1), it can be seen that the reflectance R is reduced when the refractive index difference N between the first layer and the second layer is reduced.

Considering Equation (1), in the case of the touch display device according to the comparative example, light incident on the light-transmitting adhesive layer 130 (corresponding to the first layer of Equation 1) composed of a single layer is incident on the display panels 110 and 110A, (Corresponding to N1 in Equation 1) and the refractive indexes of the display panels 110 and 110A (corresponding to N2 in Equation 1) of the translucent bonding layer 130 (corresponding to the second layer of Equation 1) There is a limit in reducing the difference (? N).

On the other hand, in the case of the touch display device according to the embodiment, the refractive index difference N between the plurality of light-transmitting adhesive layers 130 having different refractive indexes and the display panels 110 and 110A is different from the refractive index By adjusting the car, it can be reduced compared to the comparative example.

For example, the first refractive index difference between the i-th refractive index of the i (where 1? I? K-1) light-transmissive adhesive layer and the refractive index of the display panel 110 among the plurality of light-transmitting adhesive layers 130-1 to 130- The second refractive index difference between the j-th refractive index of the jth light-transmitting adhesive layer (2? J? K) located farther from the display panel 110 than the i-th transparent adhesive layer and the refractive index of the display panel 110 may be smaller.

As described above, in the embodiment, since the plurality of light-transmitting adhesive layers having different refractive indexes are included, the reflectance R3 at which light is reflected by the display panels 110 and 110A can be further reduced compared with the comparative example.

As a result, the touch display devices 100 and 100A according to the embodiments can be realized by implementing the light blocking adhesive layer 130 for bonding the display panel 110 and the touch panel 120 to a plurality of layers having different refractive indexes , The reflectance and the brightness index are decreased. Since the reflectance and the brightness index are reduced as described above, the touch display devices 100 and 100A according to the embodiments can provide enhanced brightness and black feeling as compared with the touch display device according to the comparative example, and can provide high visibility.

The touch display devices 100 and 100A according to the above-described embodiments are applicable to various electronic display products such as mobile phones, portable small computers, portable game machines, handy terminals, PDAs, portable audio players, notebooks or navigators, .

Hereinafter, a vehicle display unit according to an embodiment including the above-described touch display device 100, 100A will be described with reference to the accompanying drawings as follows.

9 is a view exemplarily showing the appearance of the display unit for a vehicle according to the embodiment including the touch display device 100, 100A.

Referring to FIG. 9, the vehicle display unit according to the embodiment may include the touch display device 100, 100A according to the above-described embodiment. For example, the vehicle display unit according to the embodiment includes a center interface display (CID) 200 attached to a head unit of a vehicle, a display 300 for a rear seat entertainment (RSE) Or a cluster (or driver's instrument panel) 400. Here, each of the CID 200, the RSE display 300 and the cluster 400 may include the touch display devices 100 and 100A according to the above-described embodiments.

Fig. 10 shows a schematic block diagram of the vehicle display unit 1000 according to the embodiment.

The vehicle display unit 1000 shown in FIG. 10 may include a CID 200, a vehicle playback apparatus 500, and a cable 600.

The CID 200 corresponds to the CID 200 shown in FIG. 9 and can be electrically connected to the vehicle playback apparatus 500 by the cable 300.

The CID 200 may include a touch display device 100 and an operation button 210. The vehicle playback apparatus 500 may be an apparatus that can reproduce video and audio signals such as a DVD player, and may include an operation button 510 and a recording medium input port 520.

The CID 200 transmits a control signal for controlling the on-vehicle playback apparatus 500 to the on-vehicle playback apparatus 500 via the cable 600. The on-vehicle playback apparatus 500 reproduces the on- To the CID 200 via the cable 600. The CID 200 provides driving information to a user and performs a monitor function to reproduce video and audio signals transmitted from the vehicle-use playback apparatus 500.

The CID 200 includes a touch display device 100 and may further include an operation button 210. [ That is, a user's control command for controlling the CID 200 by operating at least one of the touch display device 100 or the operation button 210 or a user's control command for controlling the on-vehicle playback device 500 is provided .

FIG. 11 shows a block diagram of an embodiment 200A of the CID 200 shown in FIG.

The CID 200A according to the embodiment shown in Figure 11 includes a touch display device 100, a storage unit 220, a control unit 230, an interface 240, an audio processing unit 250, a speaker 260, (270) and a key input unit (280).

Referring to FIG. 11, the CID 200A may receive a control command of the user through the key input unit 280 connected to the touch display device 100 or the operation button 210. FIG. The storage unit 220 may store map data and graphic data so that a navigation function can be implemented, and may store a control code for controlling the vehicle playback apparatus 500. For example, the storage unit 220 may be in the form of at least one of a flash memory, an SDRAM, or a hard disk, but embodiments are not limited thereto.

The control code that can control the vehicle playback apparatus 500 may mean a code that can identify each manufacturer so that the vehicle playback apparatus 500 manufactured by a plurality of manufacturers can be controlled. For example, when all of the control codes used by various companies are stored, if the user provides a playback start command of the vehicle playback apparatus 500, the control unit 230 may use the control code stored in the storage unit 220 To the vehicle-use playback apparatus 500 via the interface 240. The control- At this time, the in-vehicle reproducing apparatus 500 manufactured by a certain company does not operate when a control code used by another company is input, and can be operated only when a control code used by the company is inputted.

Also, the GPS unit 270 can receive positioning information such as latitude, longitude, and altitude from the satellite. The audio processing unit 250 processes the audio signal to transmit the audio signal to the speaker 260 so that the audio signal can be reproduced. The speaker 260 may be an external speaker connected to the CID 200A.

Also, the display panel 110 of the touch display device 100 may display map information and position information so that a navigation function can be implemented, and reproduce a video signal input from the vehicle-use playback device 500.

The interface 240 may be connected to the on-vehicle playback apparatus 500 to transmit a control code for controlling the on-vehicle playback apparatus 500 and receive the video and audio signals transmitted from the on-vehicle playback apparatus 500.

In addition, the controller 230 controls all parts including the touch-display device 100 to perform a navigation function, and reproduces video and audio signals received from the vehicle-use playback device 500.

9 to 11 are only one example for facilitating understanding of the vehicle display unit according to the embodiment, and the embodiment is not limited to this.

The vehicle display unit including the touch display device 100, 100A according to the embodiment can provide high outdoor visibility.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

100, 100A: Touch display device 110, 110A: Display panel
112: backlight unit 114: liquid crystal panel
114-1: TFTA substrate 114-2: CFA substrate
114-3: liquid crystal layer 114-4: lower polarizing portion
114-5: Upper polarization section 120, 120A, 120B: Touch panel
122: electrode pattern 124: high refractive index oxide layer
126: insulating layer 128: pattern cover layer
122, 122-1, 122-2: electrode patterns 130, 130A, 130B, 130C:
132, 134, 136: a light-transmitting adhesive layer
138-1 to 138-M, 154-1 to 154-N: pair structure
138B-1 to 138B-M, 154B-1 to 154B-N:
138T-1 to 138T-M, 154T-1 to 154T-N:
140, 140A: substrate 150, 150A: function plate
152 anti-glare layer 154 anti-reflection layer
156: Finger barrier layer 200, 200A: CID
220: storage unit 230:
240: interface 250: audio processor
260: Speaker 270: GPS unit
280: key input unit 300: display for RSE
400: cluster 500: vehicle playback device

Claims (15)

A display panel;
A touch panel disposed on the display panel and sensing a touch; And
And a plurality of transparent adhesive layers disposed between the display panel and the touch panel,
Wherein the plurality of light-transmitting adhesive layers have different refractive indices. The touch display device according to claim 1, wherein each of the plurality of light-transmitting adhesive layers comprises a silicon-based or acrylic-based material. The touch display device according to claim 1, wherein each of the plurality of light-transmitting adhesive layers includes at least one of an optical transparent resin (OCR), an optical transparent adhesive (OCA), or a liquid optical transparent adhesive (LOCA). The display panel of claim 1, wherein the display panel includes a liquid crystal display (LCD) panel, an organic light emitting diode (OLED) panel, a plasma display panel (PDP) panel, an electroluminescence (EL) panel, or a cathode ray tube / RTI > The display device according to claim 1, wherein the display panel
Backlight unit; And
And a liquid crystal panel disposed between the backlight unit and the plurality of light-transmitting adhesive layers, for receiving light emitted from the backlight unit and implementing an image. The liquid crystal display device according to claim 5,
A thin film transistor array substrate disposed on the backlight unit;
A color filter array substrate disposed on the thin film transistor array substrate; And
And a liquid crystal layer filled between the thin film transistor substrate and the color filter array substrate. The liquid crystal display according to claim 6, wherein the liquid crystal panel
A lower polarizer arranged between the backlight unit and the thin film transistor array substrate for polarizing light incident from the backlight unit to the liquid crystal layer; And
And a top polarizer arranged on the color filter array substrate for polarizing light transmitted from the liquid crystal layer. The touch display device according to claim 1, further comprising a substrate disposed on the touch panel. The touch panel according to claim 8,
And a first electrode pattern and a second electrode pattern disposed between the plurality of light-transmitting adhesive layers and the substrate and electrically spaced from each other. The touch panel according to claim 9,
And a high refractive index oxide layer disposed below the first and second electrode patterns, wherein the first and second electrode patterns are spaced apart from each other. The touch panel according to claim 9,
An insulating layer disposed between the first and second electrode patterns and the substrate; And
And a pattern cover layer disposed between the insulating layer and the substrate. The touch display device according to claim 8, further comprising a function plate disposed on the substrate. 13. The apparatus of claim 12, wherein the functional plate
A glare prevention layer disposed on the substrate;
An antireflection layer disposed on the anti-glare layer; or
And an anti-finger layer disposed on the anti-reflection layer. 9. The touch display device of claim 8, wherein the substrate comprises at least one of tempered glass, reinforced coating film, LCD glass or a plastic substrate for a flexible panel. The touch display device according to any one of claims 1 to 14, And
And a control unit for controlling the operation of the touch display device.

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