JP2019152695A - Display device and cover panel - Google Patents

Abstract

To provide a display device and cover panel capable of inhibiting degradation in visibility of an image.SOLUTION: A display device DSP includes a display panel PNL on which an image is displayed, and a cover panel CO. The cover panel CO includes a cover member ME opposed to the display panel PNL, a polarizer POL1 disposed along the cover member and bonded to the cover member, and a pigmented layer DE interposed between the display panel and polarizer and disposed on the polarizer.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a display device and a cover panel.

  In recent years, display devices such as liquid crystal panels and organic electroluminescence (EL) panels have been adopted as display devices from the viewpoints of space saving and power saving. In particular, in various electronic devices such as a smartphone, a tablet, an electronic book, and a mobile phone, a translucent cover panel such as a cover glass covers a display area and a non-display area of the display panel. In order to bond the display panel and the cover panel together, the polarizing plate of the display panel is adhered to the cover panel using an adhesive sheet.

  Incidentally, there may be a step in the peripheral area on the surface of the cover panel. The step is formed by, for example, a frame-shaped light shielding layer provided in the peripheral area of the cover panel. Since the light shielding layer is formed using a printing method, the step is sometimes referred to as a printing step. Even in the case of forming the light shielding layer as described above, there is a demand for a technique capable of suppressing a reduction in image visibility.

JP 2014-35493 A JP 2012-73726 A

  The present embodiment provides a display device and a cover panel that can suppress a reduction in image visibility.

A display device according to an embodiment includes:
A display panel for displaying an image; a cover member disposed opposite to the display panel; a polarizing plate provided along the cover member and adhered to the cover member; and positioned between the display panel and the polarizing plate And a cover panel having a colored layer provided on the polarizing plate.

FIG. 1 is a cross-sectional view illustrating the display device according to the first embodiment. FIG. 2 is a plan view showing the display device of FIG. FIG. 3 is a cross-sectional view showing the display panel of FIGS. 1 and 2. FIG. 4 is a view for explaining the manufacturing method of the display device according to the first embodiment, and is a cross-sectional view showing a state before the display panel is adhered to the cover panel. FIG. 5 is a cross-sectional view showing a display device according to Modification 1 of the first embodiment. FIG. 6 is an exploded perspective view showing the display device according to the first modification, and shows a state before the display panel is adhered to the cover panel. FIG. 7 is a cross-sectional view showing a display device according to Modification 2 of the first embodiment. FIG. 8 is a plan view showing the sensor panel of FIG. FIG. 9 is an enlarged plan view showing a part of the sensor panel, and shows a sensor module. 10 is a cross-sectional view of the sensor panel of FIG. 9 taken along line XX. FIG. 11 is a diagram for explaining a method of manufacturing the display device according to the second modification, and shows a state before the sensor panel is adhered to the cover panel and a state before the display panel is adhered to the sensor panel. FIG. FIG. 12 is a cross-sectional view showing a display device according to the second embodiment. FIG. 13 is a cross-sectional view showing a display device according to a comparative example.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the disclosure is merely an example, and those skilled in the art can easily conceive of appropriate modifications while maintaining the gist of the invention are naturally included in the scope of the present invention. In addition, the drawings may be schematically represented with respect to the width, thickness, shape, and the like of each part in comparison with actual aspects for the sake of clarity of explanation, but are merely examples, and the interpretation of the present invention is not limited. It is not limited. In addition, in the present specification and each drawing, elements similar to those described above with reference to the previous drawings are denoted by the same reference numerals, and detailed description may be omitted as appropriate.

(First embodiment)
First, the display device DSP according to the first embodiment will be described. FIG. 1 is a cross-sectional view showing a display device DSP according to the first embodiment. FIG. 2 is a plan view showing the display device DSP of FIG. In the present embodiment, the display device DSP is described using an organic electroluminescence (EL) display device, but may be a liquid crystal display device.

As shown in FIGS. 1 and 2, the first direction X and the second direction Y are orthogonal to each other. The third direction Z is orthogonal to the first direction X and the second direction Y, respectively. Unlike the present embodiment, the first direction X and the second direction Y may intersect at an angle other than 90 °.
In the present embodiment, the direction toward the tip of the arrow in the third direction Z is defined as up, and the direction opposite to the direction toward the tip of the arrow in the third direction Z is defined as down. Further, when “the second member above the first member” and “the second member below the first member” are used, the second member may be in contact with the first member or separated from the first member. May be located.

The display device DSP includes a display panel PNL that displays an image, a cover panel CO, and an adhesive sheet AD1.
The display panel PNL has a display area DA for displaying an image and a non-display area NDA located outside the display area DA. In the present embodiment, the display area DA has a rectangular shape, and the non-display area NDA has a frame shape and surrounds the display area DA.

  The cover panel CO has a transmission area TA and a coloring area EA. The transmissive area TA faces at least the display area DA. The transmission area TA is located inside the coloring area EA. The colored area EA is located outside the transmission area TA and faces at least the non-display area NDA. In the present embodiment, the transmissive area TA has a rectangular shape and faces the entire display area DA and a part of the non-display area NDA. The colored area EA has a frame shape, surrounds the transmission area TA, and faces a part of the non-display area NDA.

Further, the cover panel CO has a cover member ME, a polarizing plate POL1, and a colored layer DE. In FIG. 2, the colored layer DE is provided with a dot pattern.
The cover member ME is disposed to face the display panel PNL. The cover member ME is a flat type and is formed of a transparent insulating material such as glass or acrylic resin. In the present embodiment, the cover member ME is a glass substrate as a transparent insulating substrate.

  The cover member ME is located throughout the transmission area TA and the coloring area EA. In plan view, the cover member ME has a rectangular shape. For example, the cover member ME has a width and length larger than the dimensions (width and length) of the display panel PNL, and has a larger area than the display panel PNL in plan view. The cover member ME covers the entire surface of the display panel PNL. The cover member ME has a first main surface SF1 facing the display panel PNL, and a second main surface SF2 opposite to the first main surface SF1.

  The polarizing plate POL1 is located between the display panel PNL and the cover member ME, and is provided along the cover member ME. The polarizing plate POL1 is bonded to the cover member ME. The polarizing plate POL1 is located in the transmission area TA and the colored area EA. In the present embodiment, the polarizing plate POL1 is located in the entire transmission area TA and coloring area EA. Regarding the position in plan view, the outline of the cover member ME and the outline of the polarizing plate POL1 are aligned in the third direction Z.

  The colored layer DE is located between the display panel PNL and the polarizing plate POL1. The colored layer DE is provided on the polarizing plate POL1. The colored layer DE is formed on the surface of the polarizing plate POL1 facing the display panel PNL. The colored layer DE is located in the colored area EA and faces the polarizing plate POL1. The colored area EA is formed by the colored layer DE. In the present embodiment, the colored layer DE has a frame-like shape, is located in the entire colored area EA, and is not located in the transmissive area TA. The entire colored layer DE is opposed to the polarizing plate POL1.

  The colored layer DE is formed by using a black resin as a light-shielding material and using a printing method, for example. For this reason, on the side of the cover panel CO facing the display panel PNL, the colored layer DE forms a step (printing step) along the boundary between the transmissive area TA and the colored area EA. The colored layer DE is not limited to the light shielding layer, and can be variously modified. For example, the colored layer DE may be formed using a white resin. The colored layer DE may be a layer of a color other than black and white. And the colored layer DE should just color the colored area EA of the cover panel CO.

  The adhesive sheet AD1 is located between the display panel PNL and the cover panel CO. The adhesive sheet AD1 adheres the display panel PNL to the cover panel CO. In the present embodiment, the adhesive sheet AD1 is formed of OCA (Optical Clear Adhesive) as a solid adhesive material. The adhesive sheet AD1 has a uniform thickness TAD1 over the entire area. The adhesive sheet AD1 has a size smaller than the dimensions (width, length) of the display panel PNL, and the entire adhesive sheet AD1 overlaps the display panel PNL. An end AD1E of the adhesive sheet AD1 overlaps with the colored area EA. However, unlike the present embodiment, the adhesive sheet AD1 may have a size larger than the size of the display panel PNL. Further, the adhesive sheet AD1 may overlap the display panel PNL so as to protrude outside the display panel PNL in plan view.

Here, the adhesive sheet AD1 is formed thicker than the colored layer DE. The thickness TAD1 of the adhesive sheet AD1 exceeds the thickness TDE of the colored layer DE. Illustratively, the thickness TAD1 is 100 μm and the thickness TDE is 10 to 15 μm. In addition, in order to exhibit sufficient adhesive force to adhesive sheet AD1, it is desirable that thickness TAD1 is 3 times or more of thickness TDE. From the viewpoint of suppressing the overall thickness of the display device DSP, the thickness TAD1 is desirably 10 times or less than the thickness TDE.
Moreover, the refractive index of adhesive sheet AD1 may be adjusted. When the display device DSP is formed without the adhesive sheet AD1, that is, compared with the case where an air layer is present between the display panel PNL and the cover panel CO, light reflection at each interface can be reduced. Contrast can be achieved.

  The display panel PNL is a sheet type display panel and is a flexible panel. For this reason, the display panel PNL is distorted according to the level difference caused by the colored layer DE. On the other hand, the polarizing plate POL1 is not affected by the step due to the colored layer DE. The polarizing plate POL1 is not distorted and is provided along the cover member ME.

  The display panel PNL has a third main surface SF3 facing the cover panel CO, and a fourth main surface SF4 opposite to the third main surface SF3. The distance from the third main surface SF3 to the first main surface SF1 in the third direction Z includes a first distance DI1 and a second distance DI2. The first distance DI1 is a distance of a region outside the colored layer DE such as the display region DA. The second distance DI2 is the distance of the region where the colored layer DE exists. Therefore, the second distance DI2 is longer than the first distance DI1.

FIG. 3 is a cross-sectional view showing the display panel PNL of FIGS. 1 and 2. The display panel PNL is an organic EL display panel.
As shown in FIG. 3, the display panel PNL includes a first substrate SUB1, a support member 5, and a sealing layer 41. The support member 5 is located below the first substrate SUB1, and is attached to the first substrate SUB1 using the adhesive sheet AD2. The support member 5 has a fourth main surface SF4. Further, the support member 5 has flexibility. The support member 5 is made of, for example, polyethylene terephthalate.

  The first substrate SUB1 includes a first insulating substrate 10, switching elements SW1, SW2, and SW3, a light reflection layer 4, organic EL elements OLED1, OLED2, and OLED3. The first insulating substrate 10 is formed using an organic insulating material, for example, using polyimide. For this reason, it may be appropriate to refer to the first insulating substrate 10 as an organic insulating substrate (resin substrate). Or it may be appropriate to refer to the first insulating substrate 10 as an insulating layer, an organic insulating layer, or a resin layer. The first insulating substrate 10 has a first surface 10A and a second surface 10B opposite to the first surface 10A. The first insulating substrate 10 is covered with a first insulating layer 11.

  The switching elements SW1, SW2, SW3 are formed on the first insulating layer 11. In the illustrated example, the switching elements SW1, SW2, and SW3 are formed of top gate type thin film transistors, but may be formed of bottom gate type thin film transistors. Since the switching elements SW1, SW2, and SW3 have the same configuration, the structure thereof will be described in detail below with a focus on the switching element SW1. The switching element SW1 includes a semiconductor layer SC formed on the first insulating layer 11. The semiconductor layer SC is covered with the second insulating layer 12. The second insulating layer 12 is also disposed on the first insulating layer 11.

The gate electrode WG of the switching element SW1 is formed on the second insulating layer 12 and is located immediately above the semiconductor layer SC. The gate electrode WG is covered with the third insulating layer 13. The third insulating layer 13 is also disposed on the second insulating layer 12.
The first insulating layer 11, the second insulating layer 12, and the third insulating layer 13 are formed of an inorganic material such as silicon oxide or silicon nitride, for example.

  The source electrode WS and the drain electrode WD of the switching element SW1 are formed on the third insulating layer 13. The source electrode WS and the drain electrode WD are electrically connected to the semiconductor layer SC through contact holes that penetrate the second insulating layer 12 and the third insulating layer 13, respectively. The switching element SW1 is covered with the fourth insulating layer 14. The fourth insulating layer 14 is also disposed on the third insulating layer 13. For example, the fourth insulating layer 14 is formed of an organic material such as a transparent resin.

  The light reflecting layer 4 is disposed on the fourth insulating layer 14. The light reflecting layer 4 is formed of a metal material having a high light reflectance such as aluminum or silver. The surface of the light reflecting layer 4 (that is, the surface on the sealing layer 41 side) may be a flat surface or an uneven surface for imparting light scattering properties.

  The organic EL elements OLED1 to OLED3 are formed on the fourth insulating layer 14. In the illustrated example, the organic EL element OLED1 is electrically connected to the switching element SW1, the organic EL element OLED2 is electrically connected to the switching element SW2, and the organic EL element OLED3 is electrically connected to the switching element SW3. Yes. Each of the organic EL elements OLED1 to OLED3 is configured as a so-called top emission type that emits light toward the sealing layer 41 side.

For example, the organic EL element OLED1 emits red light, the organic EL element OLED2 emits green light, and the organic EL element OLED3 emits blue light. However, the color of light emitted from the organic EL elements OLED1 to OLED3 is not limited to the present embodiment, and various modifications can be made.
For example, unlike the present embodiment, the organic EL elements OLED1 to OLED3 may be configured to emit white light. In this case, the display panel PNL only needs to include a color filter.

  The organic EL element OLED1 includes a pixel electrode PE1 formed on the light reflecting layer 4. The pixel electrode PE1 is in contact with the drain electrode WD of the switching element SW1, and is electrically connected to the switching element SW1. Similarly, the organic EL element OLED2 includes a pixel electrode PE2 electrically connected to the switching element SW2, and the organic EL element OLED3 includes a pixel electrode PE3 electrically connected to the switching element SW3. The pixel electrodes PE1, PE2, and PE3 are made of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO).

  A partition insulating layer 15 is provided on the fourth insulating layer 14 and the pixel electrode PE. In the partition insulating layer 15, a through hole is provided at a position corresponding to the pixel electrode PE, or a slit is provided at a position corresponding to a column or row formed by the pixel electrode PE. Here, as an example, the partition insulating layer 15 has a through hole at a position corresponding to the pixel electrode PE.

  The organic EL elements OLED1 to OLED3 further include an organic light emitting layer ORG and a common electrode CE. One of the pixel electrode PE and the common electrode CE is an anode, and the other is a cathode. The organic light emitting layer ORG is located on each of the pixel electrodes PE1 to PE3. The organic light emitting layer ORG of the organic EL element OLED1 emits red light. The organic light emitting layer ORG of the organic EL element OLED2 emits green light. The organic light emitting layer ORG of the organic EL element OLED3 emits blue light.

The common electrode CE is located on the organic light emitting layer ORG and the partition insulating layer 15. The common electrode CE is made of, for example, a transparent conductive material such as ITO or IZO. In the illustrated example, the organic EL elements OLED1 to OLED3 are each partitioned by a partition insulating layer 15. Although not shown, it is preferable that the organic EL elements OLED1 to OLED3 are sealed with a transparent sealing film.
Unlike the present embodiment, the organic EL element may be configured as a so-called bottom emission type that emits light toward the first insulating substrate 10 side. In this case, various adjustments such as the position of the light reflecting layer 4 are made.

  The sealing layer 41 covers the organic EL elements OLED1, OLED2, and OLED3. The sealing layer 41 has a third main surface SF3. The sealing layer 41 is formed so as to seal a member disposed between the first insulating substrate 10 and the sealing layer 41. The sealing layer 41 suppresses intrusion of oxygen and moisture into the organic EL elements OLED1, OLED2, and OLED3, and suppresses deterioration of the organic EL elements OLED1, OLED2, and OLED3. The sealing layer 41 may be composed of a laminate of an inorganic film and an organic film. The above-described adhesive sheet AD1 is adhered to the sealing layer 41.

  In such a display panel PNL, when each of the organic EL elements OLED1 to OLED3 emits light, each radiated light is emitted to the cover panel CO. Thereby, color display is realized. Each pixel PX includes a single switching element SW, a single organic EL element OLED, and the like. In the display area DA, the plurality of pixels PX are arranged in a matrix in the first direction X and the second direction Y.

  The display panel PNL of the present embodiment does not incorporate a sensor. However, the display panel PNL may include a sensor for detecting input information input from the outside of the cover panel CO. For example, the display panel PNL may be a display panel capable of touch input that includes a touch sensor (not shown). Further, the sensor can detect contact or approach of an object to be detected to the second main surface SF2.

  Next, a method for manufacturing the display device DSP of this embodiment will be described. Here, a process of adhering the display panel PNL to the cover panel CO will be described. FIG. 4 is a view for explaining the manufacturing method of the display device DSP according to the first embodiment, and is a cross-sectional view showing a state before the display panel PNL is adhered to the cover panel CO.

  As shown in FIG. 4, when the display panel PNL is adhered to the cover panel CO, the adhesive sheet AD1 is adhered to one of the display panel PNL and the cover panel CO. Here, the adhesive sheet AD1 is adhered to the display panel PNL. Thereafter, the display panel PNL and the cover panel CO are arranged to face each other. In a state before the display panel PNL is adhered to the cover panel CO, the display panel PNL is not distorted. Thereafter, the display panel PNL is pressed against the cover panel CO, and the display panel PNL is adhered to the cover panel CO. Thereby, the display panel PNL is distorted according to the level difference caused by the colored layer DE.

  According to the display device DSP according to the first embodiment configured as described above, the colored layer DE is located between the display panel PNL and the polarizing plate POL1. Therefore, compared with the case where the colored layer DE is located between the polarizing plate POL1 and the cover member ME, it is possible to make the polarizing plate POL1 less likely to be distorted. Since the polarizing plate POL1 without distortion does not impair the light reflection preventing effect, it is possible to suppress a decrease in image visibility.

The entire coloring layer DE is opposed to the polarizing plate POL1. The colored layer DE may function as a light shielding layer. The thickness TDE of the colored layer DE can be reduced as compared with the case where the entire colored layer DE is not opposed to the polarizing plate POL1. This is because the effect of blackening by the polarizing plate POL1 can be obtained, so that black can be expressed by a laminate of the polarizing plate POL1 and the colored layer DE.
Further, by reducing the thickness TDE, the thickness TAD1 of the adhesive sheet AD1 can be reduced. This is because even if the thickness TAD1 is reduced, the steps of the cover panel CO caused by the colored layer DE can be absorbed. Further, by reducing the thickness TAD1, the cost of the pressure-sensitive adhesive sheet AD1 can be reduced, which can contribute to the thinning of the display device DSP.

  From the above, it is possible to obtain a display device DSP that can suppress a reduction in image visibility.

(Modification 1 of the first embodiment)
Next, a display device DSP according to Modification 1 of the first embodiment will be described. FIG. 5 is a cross-sectional view showing a display device DSP according to the first modification.
As shown in FIG. 5, the cover member ME is formed to be curved so that the second main surface SF2 side is convex. In the example shown in the drawing, both ends of the cover member ME in the first direction X are curved. According to the curved end of the cover member ME, the polarizing plate POL1, the colored layer DE, the display panel PNL, and the like may be partially curved.

  Note that unlike the first modification, only one end of the cover member ME in the first direction X may be curved. Alternatively, only one end portion or both end portions in the second direction Y of the cover member ME may be curved. Alternatively, the cover member ME may be formed to be curved so that the second main surface SF2 side is concave.

  Next, a process of adhering the display panel PNL to the cover panel CO in the method for manufacturing the display device DSP of the first modification will be described. FIG. 6 is an exploded perspective view showing the display device DSP according to the first modification, and shows a state before the display panel PNL is adhered to the cover panel CO.

As shown in FIG. 6, when the display panel PNL is adhered to the cover panel CO, the adhesive sheet AD1 is adhered to one of the display panel PNL and the cover panel CO. Here, the adhesive sheet AD1 is adhered to the display panel PNL. Thereafter, the display panel PNL and the cover panel CO are arranged to face each other. The cover member ME is formed to be partially curved before the display panel PNL is adhered to the cover panel CO. The display panel PNL is not curved. Thereafter, the display panel PNL is pressed against the cover panel CO, and the display panel PNL is adhered to the cover panel CO. Thereby, the display panel PNL is partially curved according to the cover panel CO. Further, the display panel PNL is distorted in accordance with the level difference caused by the colored layer DE.
Also in Modification 1 of the first embodiment configured as described above, the same effects as those of the first embodiment can be obtained.

(Modification 2 of the first embodiment)
Next, a display device DSP according to Modification 2 of the first embodiment will be described. FIG. 7 is a cross-sectional view showing a display device DSP according to the second modification of the first embodiment. The display device DSP may further include a sensor panel SE. Also in the second modification, the display panel PNL is a sheet-type display panel and a flexible panel. The sensor panel SE is also a flexible panel.

  As shown in FIG. 7, the display device DSP further includes a sensor panel SE. The sensor panel SE is located between the display panel PNL and the colored layer DE. The sensor panel SE is configured to detect input information input from the outside of the cover panel CO. The sensor panel SE is distorted according to the level difference of the cover panel CO caused by the colored layer DE. Similarly, the display panel PNL is distorted according to the level difference. The sensor panel SE includes a third main surface SF3 that faces the cover panel CO, and a fourth main surface SF4 that is opposite to the third main surface SF3.

  The adhesive sheet AD1 is located between the sensor panel SE and the cover panel CO. The adhesive sheet AD1 adheres the sensor panel SE to the cover panel CO. In the second modification, the adhesive sheet AD1 is formed of OCA as a solid adhesive material. The adhesive sheet AD1 has a uniform thickness TAD1 over the entire area. The adhesive sheet AD1 has a size smaller than the dimensions (width and length) of the sensor panel SE, and the entire adhesive sheet AD1 overlaps the sensor panel SE. However, unlike the second modification, the adhesive sheet AD1 may have a size larger than the size of the sensor panel SE. Further, the adhesive sheet AD1 may overlap the sensor panel SE so as to protrude outside the sensor panel SE in plan view. Also in the second modification, the thickness TAD1 of the adhesive sheet AD1 exceeds the thickness TDE of the colored layer DE.

  The adhesive sheet AD3 is located between the display panel PNL and the sensor panel SE. The adhesive sheet AD3 adheres the display panel PNL to the sensor panel SE. In the present embodiment, the adhesive sheet AD3 is formed of OCA as a solid adhesive material. The adhesive sheet AD3 has a uniform thickness TAD3 over the entire area. The adhesive sheet AD3 has a size smaller than the dimensions (width and length) of the display panel PNL, and the entire adhesive sheet AD3 overlaps the display panel PNL. However, unlike the present embodiment, the adhesive sheet AD3 may have a size larger than the size of the display panel PNL. Further, the adhesive sheet AD3 may overlap the display panel PNL so as to protrude outside the display panel PNL in plan view.

  Here, the thickness TAD3 of the adhesive sheet AD3 exceeds the thickness TDE of the colored layer DE. Further, the thickness TAD3 is preferably not less than 3 times the thickness TDE and not more than 10 times the thickness TDE. The refractive index of the adhesive sheet AD3 may be adjusted. When the display device DSP is formed without the adhesive sheet AD3, that is, compared with the case where an air layer exists between the display panel PNL and the sensor panel SE, light reflection at each interface can be reduced. Contrast can be achieved.

Next, the configuration of the sensor panel SE will be exemplarily described. FIG. 8 is a plan view showing the sensor panel SE of FIG.
As shown in FIG. 8, the sensor panel SE has an insulating substrate 106, a sensor module 110, a pad group PG, and the sensor panel SE has an input area IA. Here, the input area IA overlaps the display area DA.
The insulating substrate 106 faces the display panel PNL. The insulating substrate 106 is a flat type and is formed in a rectangular shape. The insulating substrate 106 is formed using an organic insulating material such as polyimide or acrylic resin.

FIG. 9 is an enlarged plan view showing a part of the sensor panel SE and showing the sensor module 110. FIG. 10 is a cross-sectional view showing the sensor panel SE of FIG. 9 along the line XX.
As shown in FIGS. 8 to 10, the sensor module 110 is formed on the insulating substrate 106 and is positioned to face the cover panel CO. The sensor module 110 uses a capacitance method as a position detection method.

  The sensor module 110 includes a plurality of first detection electrodes 111 as detection electrodes whose capacitance changes due to input by an input means such as an operator's finger (contact or approach of the input means to the second main surface SF2). A plurality of second detection electrodes 112. The electrode pattern of the sensor module 110 includes a plurality of connection wires 116 and a plurality of connection wires 117 in addition to the plurality of first detection electrodes 111 and the plurality of second detection electrodes 112.

  The first detection electrode 111, the second detection electrode 112, the connection wiring 116, and the connection wiring 117 are disposed on the insulating substrate 106, are located in the input area IA, and are formed of a transparent conductive material such as ITO. . The plurality of first detection electrodes 111 are arranged in the first direction X and the second direction Y. The first detection electrodes 111 are squares having diagonal lines along the first direction X and the second direction Y, respectively. The first detection electrode 111 has first corners that face each other along the first direction X. In the first direction X, adjacent first corners are connected to each other.

  In this embodiment, the square first corner of the first detection electrode 111 is crushed and has a first short side 113. Therefore, the first detection electrode 111 is a hexagon having the first short side 113. The adjacent first short sides 113 are connected to each other through a connection wiring 116. The connection wiring 116 is arranged in an island shape on the insulating substrate 106.

  The plurality of first detection electrodes 111 and the plurality of connection wirings 116 connected to each other form a first wiring W <b> 1 extending in the first direction X. The plurality of first wirings W1 are arranged in the second direction Y. For example, the X coordinate of the input position by the input means can be detected by detecting a change in capacitance using the first wiring W1.

  The plurality of second detection electrodes 112 are arranged in the first direction X and the second direction Y with a gap between the plurality of first detection electrodes 111. The second detection electrodes 112 are squares having diagonal lines along the first direction X and the second direction Y, respectively. The second detection electrode 112 has second corners facing each other along the second direction Y. In the second direction Y, adjacent second corners are connected to each other.

  In this embodiment, the square second corner of the second detection electrode 112 is crushed and has a second short side 114. For this reason, the second detection electrode 112 has a hexagonal shape having the second short side 114. The adjacent second short sides 114 are connected to each other through a connection wiring 117. The connection wiring 117 is arranged in an island shape on the insulating substrate 106.

  The plurality of second detection electrodes 112 and the plurality of connection wirings 117 connected to each other form a second wiring W <b> 2 extending in the second direction Y. The plurality of second wirings W2 are arranged in the first direction X. The plurality of second detection electrodes 112 and the plurality of connection wirings 117 of the second wiring W2 are integrally formed in the same manufacturing process. For example, the Y coordinate of the input position by the input means can be detected by detecting a change in capacitance using the second wiring W2.

A lattice-shaped slit SL is formed between the first detection electrode 111 and the second detection electrode 112 to ensure an electrical insulation distance between the first detection electrode 111 and the second detection electrode 112.
On the insulating substrate 106, a plurality of insulating layers 118a are arranged in an island shape. The plurality of insulating layers 118a are arranged at a plurality of intersections of the plurality of first wirings W1 and the plurality of second wirings W2 on the insulating substrate 106, and are interposed between the plurality of first wirings W1 and the plurality of second wirings W2. Has been. The insulating layer 118a prevents a short circuit between the first wiring W1 and the second wiring W2. In this embodiment, the insulating layer 118a is formed of an organic insulating material. The connection wiring 116 and the connection wiring 117 are opposed to each other with the insulating layer 118a interposed therebetween.

  A plurality of wirings 111 a and a plurality of wirings 112 a are provided on the insulating substrate 106 outside the input area IA. In the plurality of wirings 111a, one end is connected to the first wiring W1 (first detection electrode 111) located outside the input area IA, and the other end is connected to the pad P of the pad group PG. In the plurality of wirings 112a, one end is connected to the second wiring W2 (second detection electrode 112) located outside the input area IA, and the other end is connected to the pad P of the pad group PG. For this reason, information on the X coordinate and the Y coordinate of the input position detected by the input means detected by the sensor module 110 is output to the plurality of pads P via the plurality of wirings 111a and 112a.

  Next, in the method for manufacturing the display device DSP according to the second modification, a process of adhering the sensor panel SE to the cover panel CO and adhering the display panel PNL to the sensor panel SE will be described. FIG. 11 is a diagram for explaining a method of manufacturing the display device DSP according to the second modification, in a state before the sensor panel SE is adhered to the cover panel CO, and the display panel PNL is adhered to the sensor panel SE. It is a figure which shows the state before performing.

  As shown in FIG. 11, when the sensor panel SE is adhered to the cover panel CO, the adhesive sheet AD1 is adhered to one of the sensor panel SE and the cover panel CO. Here, the adhesive sheet AD1 is adhered to the sensor panel SE. Further, when the display panel PNL is adhered to the sensor panel SE, the adhesive sheet AD3 is adhered to one of the display panel PNL and the sensor panel SE. Here, the adhesive sheet AD3 is adhered to the display panel PNL.

Thereafter, the display panel PNL, the sensor panel SE, and the cover panel CO are arranged to face each other. In this state, neither the display panel PNL nor the sensor panel SE is distorted. Thereafter, the sensor panel SE is pressed against the cover panel CO to adhere the sensor panel SE to the cover panel CO, and the display panel PNL is pressed to the sensor panel SE to adhere the display panel PNL to the sensor panel SE. Thereby, the sensor panel SE and the display panel PNL are distorted according to the level difference caused by the colored layer DE.
Also in the second modification of the first embodiment configured as described above, the same effect as in the first embodiment can be obtained.

(Second Embodiment)
Next, a display device DSP according to the second embodiment will be described. FIG. 12 is a cross-sectional view showing a display device DSP according to the second embodiment.
As shown in FIG. 12, the cover panel CO further includes a transparent base material BA. The base material BA is located between the polarizing plate POL1 and the colored layer DE. The base material BA has flexibility. The base material BA is formed of, for example, polyethylene terephthalate as an organic insulating material.

  The base material BA is located in the transmission area TA and the coloring area EA. In the present embodiment, the base material BA is located throughout the transmission area TA and the colored area EA. Regarding the position in plan view, the contour of the cover member ME, the contour of the polarizing plate POL1, and the contour of the base material BA are aligned in the third direction Z.

  The colored layer DE is located between the display panel PNL and the base material BA. The colored layer DE is located in the colored area EA and faces the polarizing plate POL1. In the present embodiment, the colored layer DE has a rectangular frame shape, is located in the entire colored area EA, and is not located in the transmissive area TA. The entire colored layer DE is opposed to the polarizing plate POL1. For example, the colored layer DE is formed on the base material BA by using a black resin as a light-shielding material and using a printing method. For this reason, also in this embodiment, the colored layer DE forms a step along the boundary between the transmissive area TA and the colored area EA.

  The colored layer DE is formed not on the polarizing plate POL1 but on the base material BA. The base material BA and the colored layer DE form a colored film FI. When the cover panel CO is formed, the polarizing plate POL1 is adhered to the cover member ME using an adhesive sheet (not shown), and then is adhered to the polarizing plate POL1 using a colored film FI (not shown).

According to the display device DSP according to the second embodiment configured as described above, similarly to the first embodiment described above, it is possible to make the polarizing plate POL1 less likely to be distorted. Therefore, also in 2nd Embodiment, the effect similar to 1st Embodiment mentioned above can be acquired.
From the above, it is possible to obtain a display device DSP that can suppress a reduction in image visibility.

(Comparative example)
Next, a display device DSP according to a comparative example will be described. FIG. 13 is a cross-sectional view showing a display device DSP according to a comparative example.
As shown in FIG. 13, in the comparative example, the polarizing plate POL1 is located between the display panel PNL and the colored layer DE. When combined with the display device DSP, the laminate of the display panel PNL and the polarizing plate POL1 is adhered to the cover panel CO using the adhesive sheet AD1. Thereby, the polarizing plate POL1 and the display panel PNL are distorted according to the level difference caused by the colored layer DE.

  According to the display device DSP according to the comparative example configured as described above, the colored layer DE is located between the polarizing plate POL1 and the cover member ME. Since distortion occurs in the polarizing plate POL1, the light reflection preventing effect by the polarizing plate POL1 is hindered, leading to a reduction in image visibility.

The entire colored layer DE does not face the polarizing plate POL1. When the colored layer DE functions as a light-shielding layer, it is difficult to express black in the laminate of the polarizing plate POL1 and the colored layer DE. It is necessary to express black only by the colored layer DE. Therefore, in the comparative example, it is difficult to reduce the thickness TDE of the colored layer DE. And it is also difficult to reduce thickness TAD1 of adhesive sheet AD1.
From the above, in the comparative example, it is difficult to obtain a display device DSP that can suppress a reduction in image visibility.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

For example, Modifications 1 and 2 of the first embodiment may be applied to the second embodiment.
When a printing method is used for forming the colored layer DE, the colored layer DE may be formed by performing so-called laser trimming following the printing method. In laser trimming, unnecessary portions of the colored layer DE can be removed by laser scanning to obtain an ideal inner edge of the colored layer DE.
In addition, a method other than the printing method such as a photolithography method may be employed for forming the colored layer DE.

  In the above-described embodiment, the organic EL display device and the liquid crystal display device are disclosed as examples of the display device. However, the above-described embodiment can be applied to any flat panel display device such as a self-luminous display device other than an organic EL display device, or an electronic paper display device having an electrophoretic element. In addition, it goes without saying that the above-described embodiment can be applied without any particular limitation from a small-sized display device to a large-sized display device.

DSP ... display device, PNL ... display panel, CO ... cover panel, ME ... cover member,
POL1 ... Polarizing plate, BA ... Base material, DE ... Colored layer, SE ... Sensor panel,
AD1, AD3 ... adhesive sheet, SF1 ... first main surface, SF2 ... second main surface,
SF3 ... third main surface, SF4 ... fourth main surface, DA ... display area, NDA ... non-display area,
TA: transmission region, EA: coloring region, TAD1, TAD3, TDE ... thickness,
DI1 ... 1st distance, DI2 ... 2nd distance.

Claims (12)

A display panel for displaying images,
A cover member disposed opposite to the display panel; a polarizing plate provided along the cover member and bonded to the cover member; and provided between the display panel and the polarizing plate and provided on the polarizing plate A cover layer having a colored layer,
Display device. The display panel has a display area for displaying an image, and a non-display area located outside the display area,
The cover panel includes at least a transmissive region facing the display region, and a colored region located outside the transmissive region and opposed to at least the non-display region,
The colored region is formed by the colored layer,
The display device according to claim 1. The colored layer is a light shielding layer,
The display device according to claim 1. An adhesive sheet that is located between the display panel and the cover panel and adheres the display panel to the cover panel;
The display device according to claim 1. An adhesive sheet that is located between the display panel and the cover panel and that adheres the display panel to the cover panel,
The display device according to claim 2, wherein an end portion of the pressure-sensitive adhesive sheet overlaps the colored region. A sensor panel that is positioned between the display panel and the colored layer and detects input information input from the outside of the cover panel;
The display device according to claim 1. It further comprises an adhesive sheet that is located between the sensor panel and the cover panel and adheres the sensor panel to the cover panel.
The display device according to claim 6. The pressure-sensitive adhesive sheet is formed thicker than the colored layer.
The display device according to claim 4 or 7. The cover member has a first main surface facing the display panel, and a second main surface opposite to the first main surface,
The cover member is formed to be curved so that the second main surface side is convex.
The display device according to claim 1. A cover member;
A polarizing plate that adheres to the cover member;
A colored layer formed on the polarizing plate,
A colored region formed by the colored layer, and a transmissive region located inside the colored region,
Cover panel. The colored layer is a light shielding layer,
The cover panel according to claim 10. The cover member has a first main surface on which the polarizing plate is provided, and a second main surface opposite to the first main surface,
The cover member is formed to be curved so that the second main surface side is convex.
The cover panel according to claim 10 or 11.

Images