Indication device

Abstract

To provide a display device capable of improving display quality.SOLUTION: A display device according to one embodiment comprises a first substrate, a second substrate facing the first substrate, a seal material which bonds the first substrate and the second substrate together, and a liquid crystal layer between the first substrate and the second substrate. According to one point of view, the seal material includes a first seal material surrounding a display area which contains a plurality of pixels and a second seal material formed of the same material with the first seal material and placed in the display area.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] Embodiments of the present invention relate to a display device.

Background Art

[0002] A display device including a pair of substrates and a liquid crystal layer between these substrates is known. Generally, the pair of substrates are adhered by a sealing material surrounding a display area including pixels.

[0003] When vibration, impact or pressure is applied to this type of display device, displacement may occur in the pair of substrates. When the alignment of the liquid crystal molecules contained in the liquid crystal layer is disturbed due to such displacement of the substrates, the display quality of the display device deteriorates. [[ID=十七]]

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] One object of the present invention is to provide a display device capable of improving display quality.

Means for Solving the Problems

[0006] A display device according to an embodiment includes a first substrate, a second substrate facing the first substrate, a sealing material bonding the first substrate and the second substrate, and a liquid crystal layer between the first substrate and the second substrate.

[0007] From one perspective, the sealing material includes a first sealing material that surrounds a display area containing a plurality of pixels, and a second sealing material formed of the same material as the first sealing material and positioned within the display area. Furthermore, the first substrate comprises a first insulating layer that is positioned in a portion of the boundaries of the plurality of pixels that does not overlap with the second sealing material in a plan view and protrudes into the liquid crystal layer, and a second insulating layer that is formed of the same material as the first insulating layer, has a larger width than the first insulating layer, and overlaps with the second sealing material in a plan view. As another example, the first substrate comprises an insulating layer that protrudes into the liquid crystal layer, the insulating layer is positioned in a portion of the boundaries of the plurality of pixels that does not overlap with the second sealing material in a plan view, and the insulating layer is not positioned in a portion of the boundaries of the plurality of pixels that overlap with the second sealing material in a plan view.

[0008] From another perspective, the sealing material includes a first sealing material that surrounds a display area containing a plurality of pixels, and a second sealing material that has a width greater than the pixels and is positioned within the display area. Furthermore, the first substrate comprises a first insulating layer that is positioned in a portion of the boundaries of the plurality of pixels that does not overlap with the second sealing material in a plan view and protrudes into the liquid crystal layer, and a second insulating layer that is formed of the same material as the first insulating layer, has a larger width than the first insulating layer, and overlaps with the second sealing material in a plan view. As another example, the first substrate comprises an insulating layer that protrudes into the liquid crystal layer, the insulating layer is positioned in a portion of the boundaries of the plurality of pixels that does not overlap with the second sealing material in a plan view, and the insulating layer is not positioned in a portion of the boundaries of the plurality of pixels that overlap with the second sealing material in a plan view. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 shows an example of the configuration of a display device according to the first embodiment. [Figure 2] Figure 2 is a schematic cross-sectional view of the display device according to the first embodiment. [Figure 3] Figure 3 is a schematic cross-sectional view of the display panel according to the first embodiment. [Figure 4] Figure 4 is a schematic plan view of the display device according to the first embodiment. [Figure 5] Figure 5 is a schematic cross-sectional view of the display panel along line AB in Figure 4. [Figure 6] Figure 6 is a schematic cross-sectional view of the display device according to the second embodiment. [Figure 7] Figure 7 is a schematic cross-sectional view of the display device according to the third embodiment. [Figure 8] Figure 8 shows an example of the voltage applied to the scan line in the third embodiment. [Figure 9] Figure 9 shows an example of the voltage applied to the signal line in the third embodiment. [Figure 10] Figure 10 is a schematic plan view of the display device according to the fourth embodiment. [Figure 11] Figure 11 is a schematic plan view of the display device according to the fifth embodiment. [Figure 12] Figure 12 is a schematic cross-sectional view of the display panel along the CD line in Figure 11. [Figure 13] FIG. 13 is a schematic cross-sectional view of a display device according to the sixth embodiment. [Figure 14] FIG. 14 is a schematic plan view of a display device according to the seventh embodiment. [Figure 15] FIG. 15 is a schematic plan view of a display device according to the eighth embodiment. [Figure 16] FIG. 16 is a schematic plan view showing an enlarged part of a second sealing material according to the eighth embodiment. [Figure 17] FIG. 17 is a schematic cross-sectional view of a display panel along the E-F line in FIG. 16. [Figure 18] FIG. 18 is a schematic cross-sectional view of a display device according to the ninth embodiment. [Figure 19] FIG. 19 is a schematic cross-sectional view of a display device according to the tenth embodiment. [Figure 20] FIG. 20 is a plan view showing a first modification example of the second sealing material. [Figure 21] FIG. 21 is a plan view showing a second modification example of the second sealing material. [Figure 22] FIG. 22 is a plan view showing a third modification example of the second sealing material. [Figure 23] FIG. 23 is a plan view showing a fourth modification example of the second sealing material.

MODE FOR CARRYING OUT THE INVENTION

[0010] Some embodiments will be described with reference to the drawings. The disclosure is merely an example, and for those that can be easily conceived by those skilled in the art for appropriate changes while maintaining the gist of the invention, they are naturally included in the scope of the present invention. Also, the drawings may be schematically represented in terms of the width, thickness, shape, etc. of each part compared to the actual aspect in order to make the description clearer, but it is merely an example and does not limit the interpretation of the present invention. Further, in this specification and each drawing, components that exhibit the same or similar functions as those described above for the already shown drawings may be given the same reference numerals, and detailed descriptions that overlap may be omitted as appropriate.

[0011] Furthermore, the drawings will include mutually orthogonal X, Y, and Z axes as needed to facilitate understanding. The direction along the X axis is called the first direction, the direction along the Y axis is called the second direction, and the direction along the Z axis is called the third direction. Viewing the various elements parallel to the third direction Z is called a plan view.

[0012] In each embodiment, a highly translucent liquid crystal display device (a so-called transparent display) using polymer-dispersed liquid crystal is disclosed as an example of a display device. However, the configurations disclosed in each embodiment, particularly the configurations relating to the sealing material for bonding a pair of substrates, can also be applied to display devices that have a general liquid crystal layer other than polymer-dispersed liquid crystal.

[0013] [First Embodiment] Figure 1 shows an example configuration of a display device DSP according to the first embodiment. The display device DSP comprises a display panel PNL and a first light source unit LU1.

[0014] In the example shown in Figure 1, the display panel PNL1 has a rectangular shape in plan view, with the length being longer in the first direction X, and has a first side F11 along the first direction X, a second side F12 along the first direction X, a third side F13 along the second direction Y, and a fourth side F14 along the second direction Y. Note that the shape of the display panel PNL is not limited to a rectangle.

[0015] The display panel PNL has a display area DA for displaying images and a frame-shaped peripheral area SA surrounding the display area DA. The display area DA comprises multiple pixels PX arranged in a matrix in the first direction X and the second direction Y.

[0016] The display panel PNL includes a liquid crystal layer LC. As schematically shown in a magnified view below Figure 1, the liquid crystal layer LC is composed of a polymer-dispersed liquid crystal containing a polymer 31 and liquid crystal molecules 32. In one example, the polymer 31 is a liquid crystalline polymer. The polymer 31 is formed in streaks extending along a first direction X and aligned in a second direction Y. The liquid crystal molecules 32 are dispersed in the gaps of the polymer 31 and are oriented so that their long axes are aligned along the first direction X.

[0017] Each of the polymer 31 and the liquid crystal molecules 32 possesses optical anisotropy or refractive index anisotropy. The responsiveness of polymer 31 to an electric field is lower than that of liquid crystal molecules 32. In one example, the orientation direction of polymer 31 hardly changes regardless of the presence or absence of an electric field. On the other hand, the orientation direction of liquid crystal molecules 32 changes in response to the voltage applied to the liquid crystal layer LC.

[0018] When no voltage is applied to the liquid crystal layer LC, the optical axes of the polymer 31 and the liquid crystal molecules 32 are parallel to each other, and light incident on the liquid crystal layer LC is transmitted through with almost no scattering (transparent state).

[0019] When a voltage is applied to the liquid crystal layer LC, the optical axes of the polymer 31 and the liquid crystal molecules 32 intersect with each other, and the light incident on the liquid crystal layer LC is scattered within the liquid crystal layer LC (scattering state).

[0020] As shown in the enlarged view above Figure 1, the display area DA has multiple scan lines G and multiple signal lines S arranged within it. The multiple scan lines G extend in the first direction X and are aligned in the second direction Y. The multiple signal lines S extend in the second direction Y and are aligned in the first direction X.

[0021] Each pixel PX comprises a switching element SW, a pixel electrode PE, a common electrode CE, and a capacitor CS. The switching element SW is composed of, for example, a thin-film transistor (TFT) and is electrically connected to the scan line G and the signal line S. The pixel electrode PE is electrically connected to the switching element SW. The common electrode CE is, for example, opposite to multiple pixel electrodes PE.

[0022] The liquid crystal layer LC (particularly the liquid crystal molecules 32) is driven by the electric field generated between the pixel electrode PE and the common electrode CE. A capacitance CS is formed, for example, between an electrode at the same potential as the common electrode CE and an electrode at the same potential as the pixel electrode PE.

[0023] The first light source unit LU1 comprises a plurality of first light sources LS1 arranged in a first direction X. Each first light source LS1 faces a first side surface F11 and illuminates the first side surface F11 with light. Optical elements such as lenses may be placed between each first light source LS1 and the first side surface F11.

[0024] Figure 2 is a schematic cross-sectional view of a display device (DSP). In this figure, the structure of the display panel (PNL) is schematically shown, and elements such as scan lines (G), signal lines (S), and switching elements (SW) are omitted.

[0025] In the example shown in Figure 2, the first light source LS1 includes a light-emitting element LDR that emits red light, a light-emitting element LDG that emits green light, and a light-emitting element LDB that emits blue light. For example, light-emitting diodes can be used as these light-emitting elements LDR, LDG, and LDB.

[0026] The display panel PNL comprises a first substrate SUB1, a second substrate SUB2 facing the first substrate SUB1, and a sealing material SE that adheres the first substrate SUB1 and the second substrate SUB2. The sealing material SE includes a first sealing material SE1 shown in Figure 2 and a second sealing material SE2 described later. The liquid crystal layer LC is located between the first substrate SUB1 and the second substrate SUB2 and is sealed by the first sealing material SE1.

[0027] The first substrate SUB1 comprises a first transparent substrate 10, the aforementioned plurality of pixel electrodes PE, and a first alignment film AL1 in contact with the liquid crystal layer LC. The second substrate SUB2 comprises a second transparent substrate 20, the aforementioned common electrode CE, and a second alignment film AL2 in contact with the liquid crystal layer LC. The first transparent substrate 10 and the second transparent substrate 20 can be formed from, for example, glass or plastic.

[0028] As shown in Figure 2, the light L1 emitted by the first light source LS1 enters the display panel PNL from the first side surface F11. The first side surface F11 includes at least one side surface of the first substrate SUB1 and the second substrate SUB2. The light L1 that enters the display panel PNL is guided mainly in the second direction Y, while being repeatedly totally reflected at the interface between the first transparent substrate 10 and the air and the interface between the second transparent substrate 20 and the air.

[0029] In the vicinity of a transparent pixel PX, light L1 is hardly scattered by the liquid crystal layer LC. Therefore, light L1 hardly leaks out from the first substrate SUB1 and the second substrate SUB2.

[0030] On the other hand, near a pixel PX in a scattered state, light L1 is scattered by the liquid crystal layer LC. This scattered light SL is emitted from the first substrate SUB1 and the second substrate SUB2 and is visible as a displayed image. By gradually defining the voltage applied to the pixel electrode PE within a predetermined range, it is also possible to achieve gradation in the degree of scattering (brightness).

[0031] Furthermore, in the vicinity of a transparent pixel PX, ambient light incident on the first substrate SUB1 or the second substrate SUB2 is transmitted through these substrates with almost no scattering. That is, when viewing the display panel PNL from the second substrate SUB2 side, the background on the first substrate SUB1 side is visible, and when viewing the display panel PNL from the first substrate SUB1 side, the background on the second substrate SUB2 side is visible.

[0032] As an image display method, for example, a field sequential method can be used, which repeats a first subframe in which a red image is displayed by lighting up the light-emitting element LDR, a second subframe in which a green image is displayed by lighting up the light-emitting element LDG, and a third subframe in which a blue image is displayed by lighting up the light-emitting element LDB.

[0033] Figure 3 is a schematic cross-sectional view of the display panel PNL. The first substrate SUB1 includes the first transparent substrate 10, the first alignment film AL1, the scan lines G, the signal lines S, and the pixel electrodes PE described above, as well as insulating layers 11, 12, 13 and capacitive electrodes CN.

[0034] The insulating layer 11 is provided on the first transparent substrate 10. The insulating layer 11 may include a plurality of inorganic films separating the semiconductor layer of the switching element SW, the scan line G, and the signal line S. The signal line S is provided on the insulating layer 11.

[0035] The insulating layer 12 covers the signal lines S and protrudes into the liquid crystal layer LC. Although not shown in the cross-section of Figure 3, the insulating layer 12 is also provided above the scan lines G. That is, in a plan view, the insulating layer 12 has a grid shape with a portion extending in a first direction X together with the scan lines G and a portion extending in a second direction Y together with the signal lines S. In each pixel PX, an opening OP surrounded by the insulating layer 12 is formed.

[0036] The capacitive electrode CN is provided on insulating layers 11 and 12 and covered by insulating layer 13. The pixel electrode PE is provided on insulating layer 13 at the aperture OP and covered by the first alignment film AL1. The pixel electrode PE faces the capacitive electrode CN across insulating layer 13 and forms the capacitance CS of the pixel PX.

[0037] The second substrate SUB2 includes, in addition to the second transparent substrate 20, common electrode CE, and second orientation film AL2 described above, a black matrix BM (light-shielding layer) and an insulating layer 21. The black matrix BM is provided on the main surface of the second transparent substrate 20. For example, the black matrix BM is in a grid pattern that overlaps with the signal line S, scan line G, and switching element SW in the third direction Z.

[0038] The common electrode CE is provided on the main surface of the second transparent substrate 20 and covers the black matrix BM. The insulating layer 21 covers the common electrode CE. The second alignment film AL2 covers the insulating layer 21. The common electrode CE faces multiple pixel electrodes PE. The common electrode CE is at the same potential as the capacitive electrode CN.

[0039] The insulating layers 11, 13, and 21 are formed of transparent inorganic materials such as silicon oxide, silicon nitride, and silicon oxynitride. The insulating layer 12 is formed of a transparent organic material such as acrylic resin. The capacitive electrode CN, pixel electrode PE, and common electrode CE are formed of transparent conductive materials such as indium tin oxide (ITO) and indium zinc oxide (IZO). The black matrix BM is formed of a light-shielding material such as a metal or black resin with low visible light reflectivity.

[0040] The liquid crystal layer LC contains the aforementioned striated polymer 31 and liquid crystal molecules 32. The liquid crystal molecules 32 shown in Figure 3 correspond to a state where no potential difference is formed between the pixel electrode PE and the common electrode CE, and are oriented so that the director (long axis of the liquid crystal molecule 32) is approximately parallel to the stretching direction of the polymer 31. When a potential difference is formed between the pixel electrode PE and the common electrode CE, the liquid crystal molecules 32 rotate so that the director approaches the direction of the electric field.

[0041] Figure 4 is a schematic plan view of the display device DSP. The sealing material SE includes the first sealing material SE1 shown in Figure 2, as well as the second sealing material SE2. The first sealing material SE1 and the second sealing material SE2 are made of the same material with excellent light transmission properties.

[0042] The first sealing material SE1 is positioned in the peripheral area SA and surrounds the display area DA. That is, in a plan view, the first sealing material SE1 has a rectangular shape with a portion along the first side surface F11, a portion along the second side surface F12, a portion along the third side surface F13, and a portion along the fourth side surface F14.

[0043] The second seal material SE2 is mostly located in the display area DA. In the example in Figure 4, the second seal material SE2 has one first portion SE2x extending parallel to the first direction X and two second portions SE2y extending parallel to the second direction Y. The number of first portions SE2x and second portions SE2y in the second seal material SE2 is not limited to this example.

[0044] The first part SE2x and the second part SE2y intersect each other. Both ends of the first part SE2x and the second part SE2y are connected to the first seal material SE1. That is, the second seal material SE2 divides the inside of the first seal material SE1 into multiple regions. In the example in Figure 4, six rectangular first regions A1 are formed, enclosed by the first seal material SE1 and the second seal material SE2. Each first region A1 corresponds to a region that does not overlap with the second seal material SE2. In the example in Figure 4, each first region A1 has the same shape, but this is not the only example.

[0045] The first sealant SE1 has a width Ws1. The second sealant SE2 (first portion SE2x and second portion SE2y) has a width Ws2. For example, width Ws1 is the average width of the first sealant SE1, and width Ws2 is the average width of the second sealant SE2. As an example, widths Ws1 and Ws2 are substantially the same. However, widths Ws1 and Ws2 may be different.

[0046] Figure 5 is a schematic cross-sectional view of the display panel PNL along line AB in Figure 4. In this figure, the insulating layers 11, 13, 21 and the capacitive electrode CN shown in Figure 3 are omitted. In the following explanation, the region of the display area DA that overlaps with the second sealing material SE2 in a plan view will be referred to as the second region A2.

[0047] The second sealing material SE2 is in contact with both the first alignment film AL1 and the second alignment film AL2. The second sealing material SE2 has a pair of side surfaces SF. Both of these side surfaces SF are in contact with the liquid crystal layer LC.

[0048] A pixel PX has a width Wpx in the first direction X. For example, width Wpx is the distance between the centers of two signal lines S that sandwich a single pixel PX. Width Wpx can also be called the pitch of the pixel PX in the first direction X. The width Ws2 of the second seal material SE2 is greater than the width Wpx (Ws2 > Wpx). Similarly, the width of the pixel PX in the second direction Y (the distance between the centers of two adjacent scan lines G) is also greater than the width Ws2.

[0049] In this embodiment, pixels PX are arranged not only in the first region A1 but also in the second region A2. That is, the second sealing material SE2 overlaps with multiple pixels PX arranged in the width direction (first direction X in the example of Figure 5). Although Figure 5 shows an example in which the second sealing material SE2 overlaps with two pixels PX, the second sealing material SE2 may overlap with more pixels PX (for example, five or more pixels PX).

[0050] During the manufacturing of the display device DSP, the first sealing material SE1 and the second sealing material SE2 are drawn onto the first substrate SUB1 or the second substrate SUB2 using the same material, for example, by being dispensed from the same dispenser. Subsequently, the first substrate SUB1 and the second substrate SUB2 are bonded together.

[0051] As a method for introducing the liquid crystal layer LC between the first substrate SUB1 and the second substrate SUB2, an injection method may be employed in which the liquid crystal material is injected under vacuum conditions from an injection port provided in the first sealing material SE1 after the first substrate SUB1 and the second substrate SUB2 have been bonded together, or a drip method may be employed in which the liquid crystal material is dropped onto one of the substrates before the first substrate SUB1 and the second substrate SUB2 have been bonded together, and then the substrates are bonded together under vacuum conditions.

[0052] In this embodiment, the inside of the first seal material SE1 is divided into multiple first regions A1 by the second seal material SE2. In such a case, an injection method would require providing an injection port leading to each first region A1, so adopting a drip method is preferable from the viewpoint of simplifying the manufacturing process.

[0053] When the display panel PNL deforms due to stress caused by vibration, shock, or pressure, the first substrate SUB1 and the second substrate SUB2 shift, disrupting the orientation of the polymer 31 and liquid crystal molecules 32, resulting in unevenness in the displayed image. When such unevenness occurs, the uniformity of the display is impaired, and the contrast ratio may also decrease. If the size of the display panel PNL is small, the amount of deformation is reduced by the first sealant SE in the peripheral region SA, even if the second sealant SE2 is not provided. However, if the size is large, the amount of deformation increases, and the unevenness becomes more pronounced.

[0054] In contrast, in the display device DSP according to this embodiment, a second seal material SE2 is provided in the display area DA in addition to the first seal material SE1. This makes it less likely for the first substrate SUB1 and the second substrate SUB2 to shift even when stress is applied, and can suppress disorder in the orientation of the polymer 31 and liquid crystal molecules 32. As a result, the occurrence of the above-mentioned unevenness is suppressed, and the display quality of the display device DSP can be improved. This effect becomes more pronounced as the size of the display panel PNL increases.

[0055] In this embodiment, the first sealing material SE1 and the second sealing material SE2 are formed from the same material. In this case, these sealing materials SE1 and SE2 can be manufactured using the same manufacturing equipment.

[0056] In this embodiment, the width Ws2 of the second sealing material SE2 is greater than the width Wpx of the pixel PX. In this case, good adhesive strength can be expected from the second sealing material SE2, and the displacement between the first substrate SUB1 and the second substrate SUB2 can be effectively suppressed.

[0057] [Second Embodiment] A second embodiment will now be described. The configuration of the display device DSP, unless otherwise specified, can be the same as in the first embodiment.

[0058] Figure 6 is a schematic cross-sectional view of a display device DSP (display panel PNL) according to the second embodiment. In this embodiment, pixels PX are not arranged in the second region A2 that overlaps with the second sealing material SE2. That is, pixel electrodes PE and switching elements SW are not provided between the second sealing material SE2 and the first transparent substrate 10.

[0059] In the cross-section shown in Figure 6, the signal line S, insulating layer 12, and black matrix BM are not located in the second region A2. The signal line S intersects with the first portion SE2x shown in Figure 4 in a plan view. That is, the signal line S partially overlaps with the first portion SE2x in a plan view, but does not overlap with the second portion SE2y.

[0060] The relationship between the scan line G and the second seal material SE2 is the same as the relationship between the signal line S and the second seal material SE2. That is, the scan line G does not overlap with the first part SE2x in a plan view, but it partially overlaps with the second part SE2y.

[0061] As in this embodiment, if pixels PX are not placed in the second region A2 that overlaps with the second sealing material SE2, partial loss of the image displayed in the display region DA can be suppressed.

[0062] [Third Embodiment] A third embodiment will now be described. The configuration of the display device DSP, unless otherwise specified, can be the same as that of the first embodiment.

[0063] Figure 7 is a schematic cross-sectional view of a display device DSP (display panel PNL) according to the third embodiment. In this embodiment, dummy pixels DP are arranged in the second region A2 which overlaps with the second sealing material SE2.

[0064] A dummy pixel DP is a pixel that does not display an image (a pixel that does not form a potential difference between the pixel electrode PE and the common electrode CE). A dummy pixel DP may have a switching element SW and a pixel electrode PE, similar to a pixel PX, or it may not have at least one of the switching element SW and the pixel electrode PE. Also, a dummy pixel DP may have a switching element SW and a pixel electrode PE, similar to a pixel PX, but these do not have to be electrically connected.

[0065] As shown in Figure 7, the dummy pixels DP are positioned not only in the region overlapping with the second portion SE2y of the second sealing material SE2, but also in the region overlapping with the first portion SE2x. The size of the dummy pixels DP is, for example, the same as that of the pixels PX.

[0066] Dummy pixels DP are also provided with signal lines S, scan lines G, and a black matrix BM. That is, the multiple signal lines S of the display panel PNL are arranged at a constant pitch in both the first region A1 and the second region A2. Similarly, the multiple scan lines G of the display panel PNL are arranged at a constant pitch in both the first region A1 and the second region A2.

[0067] As in this embodiment, by placing dummy pixels DP in the second region A2, the aperture ratio of the display region DA can be made uniform overall. This also makes the transparency of the display region DA uniform overall.

[0068] Furthermore, compared to the case where pixels PX and dummy pixels DP are not placed in the second region A2, as in the second embodiment, changes in the capacitance and load of the scan lines G and signal lines S are suppressed. This makes it possible to obtain electrical stability for the display device DSP.

[0069] Figure 8 shows an example of a voltage applied to the scan line G. Figure 9 shows an example of a voltage applied to the signal line S. The multiple dummy pixels DP in Figure 8 overlap with the first portion SE2x, which is parallel to the scan line G, and are aligned in the first direction X. The multiple dummy pixels DP in Figure 9 overlap with the second portion SE2y, which is parallel to the signal line S, and are aligned in the second direction Y.

[0070] In the following explanation, the pixel electrode PE and switching element SW located in pixel PX will be referred to as the first pixel electrode PE1 and the first switching element SW1, respectively, and the pixel electrode PE and switching element SW located in dummy pixel DP will be referred to as the second pixel electrode PE2 and the second switching element SW2, respectively.

[0071] Furthermore, as shown in Figure 8, the scan line G connected to the first switching element SW1 of a pixel PX that does not overlap with the first portion SE2x is called the first scan line G1, and the scan line G connected to the second switching element SW2 of a dummy pixel DP that overlaps with the first portion SE2x is called the second scan line G2. In addition, as shown in Figure 9, the signal line S connected to the first switching element SW1 of a pixel PX that does not overlap with the second portion SE2y is called the first signal line S1, and the signal line S connected to the second switching element SW2 of a dummy pixel DP that overlaps with the second portion SE2y is called the second signal line S2.

[0072] Each scan line G1 and G2 is connected to the gate driver GD shown in Figure 8. The gate driver GD applies a gate voltage Vg1 to each first scan line G1, which has a waveform in which low potential VL and high potential VH alternate. The low potential VL is the potential to turn off the first switching element SW1. The high potential VH is the potential to turn on the first switching element SW1.

[0073] On the other hand, the gate driver GD applies a gate voltage Vg2 with a constant waveform at a low potential VL to each second scan line G2. Depending on the gate voltage Vg2, the second switching element SW2 may not be turned on.

[0074] Each signal line S1 and S2 is connected to the source driver SD shown in Figure 9. The source driver SD sequentially applies a display voltage Vsig to each first signal line S1, which should be supplied to the first pixel electrode PE1 of multiple pixels PX arranged in the second direction Y. The display voltage Vsig has a different potential from the common voltage Vcom applied to the common electrode CE.

[0075] Meanwhile, the source driver SD applies the same common voltage Vcom as the common electrode CE to each second signal line S2. The common voltage Vcom may be constant, as shown in Figure 9(a). Alternatively, it may be inverted frame by frame, as shown in Figure 9(b).

[0076] As shown in the example in Figure 8, when a constant gate voltage Vg2 is applied to each second scan line G2, it is not necessary to provide a circuit for driving the second scan line G2 in the gate driver GD. Therefore, the configuration of the gate driver GD can be simplified. Furthermore, by setting the gate voltage Vg2 to a low potential VL, the potential of each second scan line G2 becomes almost the same as that of the first scan line G1, enabling electrically stable driving.

[0077] As shown in the example in Figure 9, when a common voltage Vcom is applied to each second signal line S2, no potential difference is generated between the second signal line S2 and the common electrode CE or the capacitive electrode CN mentioned above. This also enables electrically stable driving and suppresses the unwanted electric field acting on the liquid crystal layer LC.

[0078] [Fourth Embodiment] A fourth embodiment will now be described. The configuration of the display device DSP, unless otherwise specified, can be the same as that of the embodiments described above.

[0079] Figure 10 is a schematic plan view of a display device DSP according to the fourth embodiment. In this embodiment, the display device DSP further comprises a second light source unit LU2. The second light source unit LU2 includes a plurality of second light sources LS2 arranged along the second side surface F12.

[0080] The second light source LS2 irradiates light onto the second side surface F12. The second side surface F12 includes at least one side surface of the first substrate SUB1 and the second substrate SUB2. Similar to the first light source LS1 shown in Figure 2, the second light source LS2 includes a light-emitting element LDR that emits red light, a light-emitting element LDG that emits green light, and a light-emitting element LDB that emits blue light.

[0081] A portion of the light L1 emitted by the first light source LS1 is absorbed and scattered by the first portion SE2x of the second sealing material SE2. As a result, the intensity of the light L1 changes before and after passing through the first portion SE2x. Consequently, in the configurations of the above embodiments, the uniformity of the brightness of the image displayed in the display area DA may be impaired.

[0082] In contrast, in this embodiment, the light L2 emitted by the second light source LS2 is guided from the second side surface F12 toward the first side surface F11. A portion of the light L2 is also absorbed and scattered by the first portion SE2x. As a result, the combined intensity of light L1 and light L2 becomes roughly uniform in the display area DA, and the brightness of the displayed image is made uniform.

[0083] [Fifth Embodiment] A fifth embodiment will now be described. The configuration of the display device DSP, unless otherwise specified, can be the same as that of the embodiments described above.

[0084] Figure 11 is a schematic plan view of a display device DSP according to the fifth embodiment. In this embodiment, the display device DSP includes wall portions PT arranged along the inner surface of each first region A1. The wall portions PT are formed of, for example, an organic material.

[0085] In the example shown in Figure 11, the wall portion PT is a rectangular frame that extends along both the first sealant SE1 and the second sealant SE2. In another example, the wall portion PT may be provided only along the second sealant SE2.

[0086] Figure 12 is a schematic cross-sectional view of the display panel PNL along the CD line in Figure 11. The wall portion PT covers the side surface SF of the second sealant SE2. Although not shown in the cross-section of Figure 12, the side surface of the first sealant SE1 is also covered by the wall portion PT.

[0087] In the example shown in Figure 12, the wall portion PT is provided on the second substrate SUB2, and its tip is in contact with the first orientation film AL1. In another example, the wall portion PT may be provided on the first substrate SUB1, and its tip may be in contact with the second orientation film AL2. Alternatively, the wall portion PT may be provided on both the first substrate SUB1 and the second substrate SUB2, and their tips, or the orientation films AL1 and AL2 formed on their tips, may be in contact. When the wall portion PT is provided on the first substrate SUB1, such a wall portion PT may be formed from the same material as the insulating layer 12.

[0088] When forming the liquid crystal layer LC using the above-described drop method, if the liquid crystal layer LC comes into contact with the uncured first sealant SE1 and second sealant SE2, these sealants SE1 and SE2 may dissolve into the liquid crystal layer LC. In contrast, if a wall portion PT is provided as in this embodiment, contact between the uncured first sealant SE1 and SE2 and the liquid crystal layer LC can be suppressed.

[0089] [Sixth Embodiment] A sixth embodiment will now be described. The configuration of the display device DSP, unless otherwise specified, can be the same as that of the embodiments described above.

[0090] Figure 13 is a schematic cross-sectional view of a display device DSP according to the sixth embodiment. In this embodiment, the first substrate SUB1 and the second substrate SUB2 are flexible. Such first substrate SUB1 and second substrate SUB2 can be realized, for example, by forming the first transparent substrate 10 and the second transparent substrate 20 from a flexible plastic such as polyimide.

[0091] In the example shown in Figure 13, the display panel PNL is curved in a cross-section along the XZ plane, which is parallel to the first direction X and the third direction Z. The display panel PNL may also be curved in a cross-section along the YZ plane, which is parallel to the second direction Y and the third direction Z.

[0092] The display panel PNL is flat and parallel to the first direction X and the second direction Y when no external force is applied, and may bend when an external force is applied. As another example, the display panel PNL may be fixed in a pre-bent state.

[0093] When the display panel PNL is bent, a misalignment may occur between the first substrate SUB1 and the second substrate SUB2. When such a misalignment occurs, forces such as shear stress parallel to each substrate and compressive stress perpendicular to each substrate disrupt the orientation of the polymer and liquid crystal molecules contained in the liquid crystal layer LC, resulting in unevenness in the displayed image.

[0094] In contrast, if the second sealing material SE2 is present, the misalignment of substrates SUB1 and SUB2 in the display area DA can be suppressed compared to the case where the first substrate SUB1 and the second substrate SUB2 are bonded together using only the first sealing material SE1. As a result, unevenness in the displayed image is suppressed, and the display quality of the display device DSP is improved.

[0095] [Seventh Embodiment] A seventh embodiment will now be described. The configuration of the display device DSP, unless otherwise specified, can be the same as that of the embodiments described above.

[0096] Figure 14 is a schematic plan view of the DSP display device according to the seventh embodiment. In this embodiment, the aperture ratio in the first region A1 and the aperture ratio in the second region A2 are equivalent.

[0097] Here, the aperture ratio corresponds to the proportion of the light-transmitting area per unit area. The light-transmitting area corresponds to the area that does not overlap with light-shielding parts such as the black matrix BM or wiring (scan lines G and signal lines S, etc.).

[0098] In the example shown in Figure 14, the shape of the black matrix BM is the same in both the first region A1 and the second region A2. Specifically, the aperture width Wbx1 in the first direction X of the black matrix BM in the first region A1 is the same as the aperture width Wbx2 in the first direction X of the black matrix BM in the second region A2. Furthermore, the aperture width Wby1 in the second direction Y of the black matrix BM in the first region A1 is the same as the aperture width Wby2 in the second direction Y of the black matrix BM in the second region A2. The wiring, such as the scan lines G and signal lines S, overlaps with the black matrix BM, and the aperture ratio of the first region A1 and the second region A2 is effectively determined by the shape of the black matrix BM.

[0099] If a light-shielding section such as a black matrix BM is not provided in the second region A2, the uniformity of transmittance between the first region A1 and the second region A2 may be compromised, potentially reducing the display quality. On the other hand, if the aperture ratio of the first region A1 and the aperture ratio of the second region A2 are the same, the transmittance of the display panel PNL will be uniform throughout the entire display region DA, improving the display quality.

[0100] [Eighth Embodiment] An eighth embodiment will now be described. The configuration of the display device DSP, unless otherwise specified, can be the same as that of the embodiments described above.

[0101] Figure 15 is a schematic plan view of the display device DSP according to the eighth embodiment. Figure 16 is a schematic plan view showing an enlarged portion of the second sealing material SE2. The display device DSP shown in Figure 15 comprises a display panel PNL and a first light source unit LU1. The display device DSP may further include a second light source unit LU2, as in the example in Figure 10.

[0102] The liquid crystal layer LC (polymer and liquid crystal molecules) and the second sealant SE2 have different refractive indices. Therefore, a portion of the light L1 from the first light source LS1 may be reflected at the interface between the liquid crystal layer LC and the second sealant SE2. When this reflected light L1a is emitted from the display panel PNL, unwanted light leakage occurs, degrading the display quality.

[0103] Therefore, in this embodiment, the light-shielding portion SLD is arranged as shown in Figure 16. The light-shielding portion SLD overlaps, in a plan view, with the interface between the liquid crystal layer LC and the second sealing material SE2, i.e., the side surfaces SF of the first portion SE2x and the second portion SE2y.

[0104] The light-shielding portion SLD has a portion extending in a first direction X along the side surface SF of the first portion SE2x, and a portion extending in a second direction Y along the side surface SF of the second portion SE2y. As an example, the light-shielding portion SLD is frame-shaped and surrounds the first region A1.

[0105] In the example shown in Figure 16, the width of the light-shielding portion SLD is smaller than the widths of the first portion SE2x and the second portion SE2y. Furthermore, the light-shielding portion SLD does not overlap with the central portion of the first portion SE2x in the second direction Y, nor with the central portion of the second portion SE2y in the first direction X.

[0106] Figure 17 is a schematic cross-sectional view of the display panel PNL along the EF line in Figure 16. For example, the light-shielding section SLD includes a first light-shielding section SLD1 located on the first substrate SUB1 and a second light-shielding section SLD2 located on the second substrate SUB2.

[0107] The first light-shielding section SLD1 is positioned, for example, between the first transparent substrate 10 and the insulating layer 11. The second light-shielding section SLD2 is positioned, for example, between the second transparent substrate 20 and the common electrode CE. The first light-shielding section SLD1 and the second light-shielding section SLD2 are made of a light-shielding material such as a metal or black resin with low visible light reflectivity. The second light-shielding section SLD2 may be made of the same material as the black matrix BM. In this case, the second light-shielding section SLD2 and the black matrix BM may be connected.

[0108] The first light-shielding portion SLD1 and the second light-shielding portion SLD2 face each other in the third direction Z. The side surface SF of the second sealing material SE2 is located between the first light-shielding portion SLD1 and the second light-shielding portion SLD2. The planar shapes of the first light-shielding portion SLD1 and the second light-shielding portion SLD2 coincide, for example. However, the planar shapes of these light-shielding portions SLD1 and SLD2 may differ in at least a part.

[0109] In the example shown in Figure 17, a portion of the light L1 is reflected by the side SF (the interface between the liquid crystal layer LC and the second sealing material SE2), generating reflected light L1a. This reflected light L1a is absorbed by the first light-shielding section SLD1 or the second light-shielding section SLD2. As a result, light leakage is suppressed.

[0110] Furthermore, the light-shielding section SLD does not necessarily have to include either the first light-shielding section SLD1 or the second light-shielding section SLD2. Even in this case, the effect of reducing light leakage to the side of the first substrate SUB1 and the second substrate SUB2 on which the light-shielding section is provided can be obtained.

[0111] [Ninth Embodiment] A ninth embodiment will now be described. The configuration of the display device DSP, unless otherwise specified, can be the same as that of the embodiments described above.

[0112] Figure 18 is a schematic cross-sectional view of a display device DSP according to the ninth embodiment. In this embodiment, the insulating layer 12 is not provided in the second region A2. That is, the insulating layer 12 is provided in the portion of the boundary between multiple pixels PX that does not overlap with the second sealing material SE2 in a plan view, and the insulating layer 12 is not provided in the portion of the boundary between multiple pixels PX that overlaps with the second sealing material SE2 in a plan view.

[0113] As a result, the surface of the first alignment film AL1 in the second region A2 becomes flatter than the surface of the first alignment film AL1 in the first region A1. The pixels placed in the second region A2 may be ordinary pixels PX, as in the first embodiment, or dummy pixels DP, as in the third embodiment.

[0114] Figure 18 shows a cross-section including the second portion SE2y, but the same configuration can be applied to a cross-section including the first portion SE2x. That is, in the second region A2, the insulating layer 12 that overlaps with the scan line G does not need to be provided.

[0115] In the configuration of this embodiment, the base surface of the second sealant SE2 is relatively flat, which makes it possible to stabilize the shape of the second sealant SE2.

[0116] [Tenth Embodiment] A tenth embodiment will now be described. The configuration of the display device DSP, unless otherwise specified, can be the same as that of the embodiments described above.

[0117] Figure 19 is a schematic cross-sectional view of a display device DSP according to the 10th embodiment. In this embodiment, the insulating layer 12 includes a first insulating layer 12a located in the first region A1 and a second insulating layer 12b located in the second region A2. The first insulating layer 12a and the second insulating layer 12b are formed of the same material and are both covered with a first orientation film AL1.

[0118] The first insulating layer 12a is provided above the scan lines G and signal lines S, just like the insulating layer 12 in each of the embodiments described above, and protrudes into the liquid crystal layer LC. That is, the first insulating layer 12a is positioned at the boundary of a plurality of pixels PX in a portion that does not overlap with the second sealing material SE2 in a plan view.

[0119] The second insulating layer 12b has a wider width than the first insulating layer 12a and is provided throughout the space between the second sealing material SE2 and the first transparent substrate 10. In the example shown in Figure 19, the width of the second insulating layer 12b is greater than the width of the second sealing material SE2.

[0120] Although Figure 19 shows a cross-section including the second portion SE2y, the same configuration can be applied to a cross-section including the first portion SE2x. The second insulating layer 12b may also be placed below the first sealing material SE1.

[0121] The pixels located in the second region A2 may be ordinary pixels PX, as in the first embodiment, or dummy pixels DP, as in the third embodiment. The second insulating layer 12b covers these pixels PX or dummy pixels DP.

[0122] With the configuration of this embodiment, the height of the second sealing material SE2 is stabilized. This makes it possible to equalize the cell gap between the first alignment film AL1 and the second alignment film AL2 at various points in the display area DA.

[0123] [Modified example of the second sealing material SE2] The shape of the second seal material SE2 is not limited to those disclosed in the first to tenth embodiments. Other configurations applicable to the second seal material SE2 are exemplified below.

[0124] Figure 20 is a plan view showing a first modified example of the second seal material SE2. In the example of Figure 20, two second seal materials SE2 are arranged in the display area DA. These second seal materials SE2 extend parallel to the second direction Y, just like the second portion SE2y described above. Note that the number of second seal materials SE2 is not limited to two; there may be one or three or more.

[0125] In the example shown in Figure 20, the second sealing material SE2 does not have a portion extending in the first direction X. In this case, the light guidance from the first light source LS1 is less likely to be obstructed by the second sealing material SE2.

[0126] Figure 21 is a plan view showing a second modified example of the second seal material SE2. In the example of Figure 21, one second seal material SE2 is placed in the display area DA. This second seal material SE2 extends parallel to the first direction X, just like the first portion SE2x described above. In the example of Figure 20, the second seal material SE2 does not have a portion extending in the second direction Y.

[0127] In the example shown in Figure 21, two first regions A1 aligned in the second direction Y are formed in the display region DA. In this case, a second light source unit LU2, similar to that in the example shown in Figure 10, may be arranged to equalize the brightness in each first region A1.

[0128] Figure 22 is a plan view showing a third modified example of the second seal material SE2. In the example in Figure 22, the second seal material SE2 has a plurality of island portions ILDs arranged inside the first seal material SE1. These island portions ILDs are spaced apart in the first direction X and the second direction Y. In the example in Figure 22, the island portions ILDs are cross-shaped, with portions extending in the first direction X and portions extending in the second direction Y.

[0129] Figure 23 is a plan view showing a fourth modified example of the second seal material SE2. In the example of Figure 23, the second seal material SE2 also has multiple island portions ILDs arranged at intervals in the first direction X and the second direction Y. However, in the example of Figure 23, the island portions ILDs are circular. The diameter of such island portions ILDs is larger than, for example, the width of the first seal material SE1 or the pixel PX.

[0130] In the examples shown in Figures 22 and 23, the inside of the first sealing material SE1 is not divided into multiple regions by the second sealing material SE2. Therefore, the formation of the liquid crystal layer LC is easy.

[0131] In other words, when using the above-described drop method, the spread of the dropped liquid crystal material is less likely to be hindered by the second seal material SE2. Also, when using the above-described injection method, if the liquid crystal material is injected from one injection port, the liquid crystal material will spread throughout the entire inside of the first seal material SE1.

[0132] In the examples shown in Figures 22 and 23, the liquid crystal material injection port 40 is provided in the portion of the first sealing material SE1 parallel to the second direction Y, and this injection port 40 is sealed with a sealing material 41. By providing the injection port 40 and sealing material 41 in such a portion, the light guidance from the first light source LS1 is less likely to be obstructed by the injection port 40 and sealing material 41.

[0133] The first alignment film AL1 and the second alignment film AL2 are subjected to an alignment restricting force, for example, by a rubbing process. The alignment process direction AD, in which such a rubbing process is applied, is preferably perpendicular to the light guide direction from the first light source LS1. That is, in the examples of Figures 22 and 23, the alignment process direction AD is parallel to the first direction X. In this case, when the injection port 40 is provided at the position shown in Figures 22 and 23, the injected liquid crystal material spreads well along the alignment process direction AD.

[0134] All display devices that a person skilled in the art can implement by appropriately modifying the design based on the display devices described above as embodiments of the present invention also fall within the scope of the present invention insofar as they encompass the gist of the present invention.

[0135] Within the scope of the spirit of the present invention, a person skilled in the art can conceive of various modifications, and such modifications are also understood to fall within the scope of the present invention. For example, modifications made by a person skilled in the art to the above-described embodiments, such as adding, deleting, or changing the design of components, or adding, omitting, or changing the conditions of processes, are also included within the scope of the present invention, as long as they retain the gist of the present invention.

[0136] Furthermore, any other effects and advantages brought about by the embodiments described above that are obvious from the description herein or that can be appropriately conceived by those skilled in the art are naturally considered to be brought about by the present invention. [Explanation of symbols]

[0137] DSP...Display device, PNL...Display panel, LU1...First light source unit, LS1...First light source, LU2...Second light source unit, LS2...Second light source, SUB1...First substrate, 10...First transparent substrate, PE...Pixel electrode, AL1...First alignment layer, SUB2...Second substrate, 20...Second transparent substrate, CE...Common electrode, AL2...Second alignment layer, LC...Liquid crystal layer, SE...Sealing material, SE1...First sealing material, SE2...Second sealing material.

Claims

1. First circuit board and A second substrate facing the first substrate, A sealing material for bonding the first substrate and the second substrate, The liquid crystal layer between the first substrate and the second substrate, Equipped with, The aforementioned sealing material is A first sealing material enclosing a display area containing multiple pixels, A second sealing material, formed from the same material as the first sealing material and positioned in the display area, Includes, The first substrate is A first insulating layer is provided, which is located in the portion of the boundaries of the plurality of pixels that does not overlap with the second sealing material in a plan view, and which protrudes into the liquid crystal layer. A second insulating layer is formed of the same material as the first insulating layer, has a wider width than the first insulating layer, and overlaps with the second sealing material in a plan view. A display device equipped with the following features.

2. First circuit board and A second substrate facing the first substrate, A sealing material for bonding the first substrate and the second substrate, The liquid crystal layer between the first substrate and the second substrate, Equipped with, The aforementioned sealing material is A first sealing material enclosing a display area containing multiple pixels, A second sealing material having a width larger than the aforementioned pixel and arranged in the display area, Includes, The first substrate is, A first insulating layer is provided, which is located in the portion of the boundaries of the plurality of pixels that does not overlap with the second sealing material in a plan view, and which protrudes into the liquid crystal layer. A second insulating layer is formed of the same material as the first insulating layer, has a wider width than the first insulating layer, and overlaps with the second sealing material in a plan view. A display device equipped with the following features.

3. The second sealing material overlaps with at least one of the pixels in a plan view. The display device according to claim 1 or 2.

4. In a plan view, the pixels are not located in the region that overlaps with the second sealing material. The display device according to claim 1 or 2.

5. The aforementioned display area includes dummy pixels that do not display images. The second sealing material overlaps with the dummy pixel, The display device according to claim 1 or 2.

6. The first substrate is, A first pixel electrode is arranged in the aforementioned pixel and overlaps with the liquid crystal layer in a plan view, A second pixel electrode is placed in the dummy pixel and overlaps with the second sealing material in a plan view, A first switching element connected to the first pixel electrode, A second switching element connected to the second pixel electrode, A first scan line connected to the first switching element, The second scanning line connected to the second switching element, A first signal line connected to the first switching element, The second signal line connected to the second switching element, Equipped with, The display device according to claim 5.

7. The system further comprises gate drivers connected to the first scan line and the second scan line, The gate driver applies a voltage with a waveform that alternates between low and high potentials to the first scan line, and applies a voltage with a constant waveform at the low potential to the second scan line. The display device according to claim 6.

8. A common electrode to which a common voltage is applied, A source driver connected to the first signal line and the second signal line, Furthermore, The source driver applies a display voltage different from the common voltage to the first signal line and applies the common voltage to the second signal line. The display device according to claim 6.

9. The system further comprises a first light source that irradiates light onto the first side surface of the first substrate or the second substrate, The aforementioned liquid crystal layer is composed of polymer-dispersed liquid crystal. The display device according to claim 1 or 2.

10. The system further comprises a second light source that irradiates light onto the second side surface of the first substrate or the second substrate. The display device according to claim 9.

11. The second sealing material further comprises a wall portion that covers the side surface, The display device according to claim 1 or 2.

12. The first substrate and the second substrate are flexible. The display device according to claim 1 or 2.

13. The display area has a first area that does not overlap with the second sealing material in a plan view, and a second area that overlaps with the second sealing material in a plan view. The aperture ratio in the first region and the aperture ratio in the second region are equivalent. The display device according to claim 1 or 2.

14. The material further comprises a light-shielding portion that overlaps with the side surface of the second sealing material in a plan view and extends along the side surface. The display device according to claim 1 or 2.

15. The second sealing material divides the inside of the first sealing material into multiple regions. The display device according to claim 1 or 2.

16. The second sealing material has a plurality of island portions arranged inside the first sealing material at intervals from each other. The display device according to claim 1 or 2.

17. A first substrate and A second substrate facing the first substrate, A sealing material for bonding the first substrate and the second substrate, The liquid crystal layer between the first substrate and the second substrate, Equipped with, The aforementioned sealing material is A first sealing material enclosing a display area containing multiple pixels, A second sealing material, formed from the same material as the first sealing material and positioned in the display area, Includes, The first substrate comprises an insulating layer that protrudes from the liquid crystal layer, The insulating layer is arranged in the portion of the boundary between the plurality of pixels that does not overlap with the second sealing material in a plan view. A display device in which the insulating layer is not disposed in the portion of the boundary between the plurality of pixels that overlaps with the second sealing material in a plan view.

18. A first substrate and A second substrate facing the first substrate, A sealing material for bonding the first substrate and the second substrate, The liquid crystal layer between the first substrate and the second substrate, Equipped with, The aforementioned sealing material is A first sealing material enclosing a display area containing multiple pixels, A second sealing material having a width larger than the aforementioned pixel and arranged in the display area, Includes, The first substrate comprises an insulating layer that protrudes from the liquid crystal layer, The insulating layer is arranged in the portion of the boundary between the plurality of pixels that does not overlap with the second sealing material in a plan view. A display device in which the insulating layer is not disposed in the portion of the boundary between the plurality of pixels that overlaps with the second sealing material in a plan view.

Images