JP5058018B2 - Liquid crystal display - Google Patents

Description

  The present invention relates to a liquid crystal display device in which a translucent front substrate and a liquid crystal panel are integrally bonded to each other with a translucent adhesive.

  Liquid crystal display devices are widely used in display units of electronic devices such as notebook personal computers, mobile phones, PDAs, and electronic dictionaries. A liquid crystal display device includes a liquid crystal panel composed of two glass substrates, a liquid crystal layer sandwiched between the glass substrates, a polarizing plate attached to the outer surface of the two glass substrates, and the liquid crystal panel. The front substrate is provided to protect the surface of the LCD, and a backlight for irradiating the liquid crystal panel with light. 2. Description of the Related Art In recent years, two glass substrates constituting a liquid crystal panel have been made thinner due to demands for making portable devices thinner. On the other hand, there is also a demand for enhanced impact resistance against dropping of portable devices and falling balls on portable devices.

  In view of this, a liquid crystal display device in which a liquid crystal panel and a front substrate are integrally bonded with a translucent adhesive has been proposed (see, for example, Patent Document 1 and Patent Document 2). When the glass substrate constituting the liquid crystal panel is thin and impact resistance is reduced, the liquid crystal panel is attached to the front substrate through a light-transmitting adhesive to form a thin and hard-to-break liquid crystal display device. That's it.

  FIG. 6 is a schematic longitudinal sectional view of the liquid crystal display device 50 in which the liquid crystal panel 53 and the front substrate 54 are attached with a translucent adhesive 59. The liquid crystal panel 53 includes an upper glass substrate 51a and a lower glass substrate 51b that are bonded together, and an upper polarizing plate 52a and a lower polarizing plate 52b that are bonded to the outer surfaces of the two glass substrates. A liquid crystal layer (not shown) is formed between the two glass substrates. A large number of pixel electrodes (not shown) are formed on the inner surfaces of the two glass substrates, and a drive signal can be supplied to the large number of pixel electrodes from a driver IC 63 mounted on the inner surface side of the lower glass substrate 51b. Has been.

  A front substrate 54 made of glass is bonded and fixed to the upper surface of the liquid crystal panel 53 with a translucent adhesive 59 interposed therebetween. The front substrate 54 has a size protruding outward from the end of the liquid crystal panel 53. A light-shielding printing film 58 is printed on the outer peripheral region of the front substrate 54 on the liquid crystal panel 53 side. The printed film 58 divides the display area of the liquid crystal panel 53 to form a display parting line 62. The print film 58 is printed by extending from the outer peripheral end of the front substrate 54 to the inner side of the outer peripheral end of the liquid crystal panel 53. An optical substrate 55 made of a lens film, a light diffusing plate, or the like is installed on the back side of the liquid crystal panel 53, and a surface-emitting backlight made up of a light guide plate 56 and LEDs 64 installed on the side thereof is installed below the optical substrate 55. Yes. Furthermore, a case 57 for housing the liquid crystal panel 53 and the backlight is installed on the outer periphery of the bottom.

When the LED 64 is turned on, light is introduced into the light guide plate 56, and the light is scattered toward the upper liquid crystal panel 53 by a reflection element (not shown) installed on the lower surface of the light guide plate 56. In this case, the leakage light 65 is applied to the printing film 58 from between the end of the liquid crystal panel 53 and the case 57. When the leakage light 65 passes through the printing film 58 formed on the back surface of the front substrate 54 and becomes visible from the upper surface of the front substrate 54, the design of the liquid crystal display device 50 is impaired. Therefore, the printing film 58 further improves the light shielding property by printing the printing film 58b on the printing film 58a. In particular, recently, a backlight having a high luminance due to an improvement in emission intensity of the LED 64 has been used. Therefore, it is necessary to improve the light shielding property of the printing film 58.
WO2007 / 063751 Japanese Patent Laid-Open No. 9-274536

  FIG. 6 is a schematic diagram showing a state in which a UV curable translucent adhesive 59 is filled between the front substrate 54 and the liquid crystal panel 53 and the translucent adhesive 59 is cured by UV light. It is sectional drawing. First, UV light is irradiated from above to the UV curable translucent adhesive 59 filled between the upper glass substrate 51a of the liquid crystal panel 53 and the upper polarizing plate 52a attached thereon and the front substrate 54. To do. In this case, although the translucent adhesive 59 in the region inside the parting line 62 of the printing film 58 is solidified, the printing film 58 has low light transmittance, so that UV light hardly reaches the lower region. The translucent adhesive 59 is difficult to solidify. Therefore, UV light is irradiated from the lateral direction of the liquid crystal panel 53 to cure the translucent adhesive 59 in the lower region of the printing film 58.

  However, the gap between the front substrate 54 and the liquid crystal panel 53 is very narrow. Therefore, it is difficult for UV light to enter inside from the outer peripheral end portion of the liquid crystal panel 53. For example, an uncured region 60 of the translucent adhesive 59 is generated from the outer peripheral end of the liquid crystal panel 53 to the inner side. In FIG. 7, a liquid crystal layer 66 sandwiched between the upper glass substrate 51a and the lower glass substrate 51b and a sealing material 67 for forming a substrate gap are illustrated.

  FIG. 8 is a schematic top view of the liquid crystal display device 50 in which the uncured region 60 shown in FIG. 7 is generated. When the uncured region 60 is generated in the translucent adhesive 59, an imbalance occurs in the stress applied from the translucent adhesive 59 to the upper glass substrate 51a between the uncured region 60 and other regions, and the parting line is obtained. Color unevenness 61 occurred in the liquid crystal panel 53 in the vicinity of 62. This is because the layer thickness of the liquid crystal layer 66 is not uniform in the outer peripheral region of the liquid crystal panel 53. Therefore, it is necessary to prevent the uncured region from occurring in the translucent adhesive 59.

  In the present invention, the following configuration is adopted in order to solve the above problems.

  (1) A liquid crystal display which is integrally formed by bonding a light-transmitting front substrate and a liquid crystal panel having a liquid crystal layer sandwiched between two light-transmitting substrates with a light-curable light-transmitting adhesive. In the apparatus, the front substrate is configured to protrude outward in plan view from the outer peripheral edge of one or both of the translucent substrates constituting the liquid crystal panel, and on the surface outer peripheral region of the front substrate on the liquid crystal panel side. Is formed with a light-shielding film that partitions the display area of the liquid crystal panel, and the light-shielding film protrudes outward in plan view from the outer peripheral edge of one or both light-transmitting substrates constituting the liquid crystal panel. An outer peripheral light-shielding film formed in a region, and an inner peripheral light-shielding film formed in an inner region in a plan view from the outer peripheral edge, the inner peripheral light-shielding film being more than the outer peripheral light-shielding film Liquid crystal characterized by high light transmittance It was shown measures.

  (2) In the liquid crystal display device of the above (1), the transmittance of the inner peripheral light-shielding film with respect to visible light is in the range of 0.1% to 10%.

  (3) In the liquid crystal display device according to the above (1) or (2), a black color filter is formed along the outer periphery of one of the translucent substrates constituting the liquid crystal panel.

  (4) In the liquid crystal display device according to any one of the above (1) to (3), a surface of the translucent substrate that constitutes the liquid crystal panel on the front substrate side is more than an outer peripheral end of the translucent substrate. Also, a polarizing plate is attached to the inner side in a plan view, and a light shielding sheet is attached to the surface of the light transmitting substrate between the outer peripheral end of the polarizing plate and the outer peripheral end of the light transmitting substrate. I did it.

  (5) In the liquid crystal display device according to any one of (1) to (4), a metal frame is inserted between the light-shielding film of the front substrate and the liquid crystal panel, and the metal frame, The front substrate and the liquid crystal panel are integrally formed by bonding with the light-transmitting adhesive.

  (6) In the liquid crystal display device according to (5), a transparent conductive film is formed on a surface of the translucent substrate located on the front substrate side, and is located in a plan view inner side than an outer peripheral end of the translucent substrate. A polarizing plate is affixed on the transparent conductive film, and a conductive light-shielding sheet is provided on the surface of the transparent conductive film between the outer peripheral end of the polarizing plate and the outer peripheral end of the translucent substrate. Is attached, and the metal frame and the transparent conductive film are electrically connected via the conductive light-shielding sheet.

  (7) In the liquid crystal display device of (4) or (6), the light shielding sheet includes a light shielding printing film.

  The present invention is a liquid crystal display device that is integrally formed by bonding a translucent front substrate and a liquid crystal panel with a photocurable translucent adhesive, and the front substrate constitutes the liquid crystal panel. A light-shielding film is formed so as to protrude outward in plan view from the outer peripheral edge of one or both light-transmitting substrates. ing. The light-shielding film includes an outer peripheral light-shielding film formed in a region protruding outward in plan view from the outer peripheral end of one or both light-transmitting substrates constituting the liquid crystal panel, and an inner region in plan view from the outer peripheral end. The inner peripheral light-shielding film is divided into the inner peripheral light-shielding film, and the inner peripheral light-shielding film has a higher light transmittance than the outer peripheral light-shielding film. Thereby, the photocuring reaction of the translucent adhesive can be promoted over the entire lower region of the light-shielding film provided on the outer peripheral surface of the front substrate on the liquid crystal panel side, and color unevenness of the liquid crystal panel can be prevented.

  FIG. 1 is a diagram for explaining a liquid crystal display device 10 of the present invention. FIG. 1A is a schematic longitudinal sectional view of the liquid crystal display device 10, and FIG. 1B is a schematic top view of the liquid crystal display device 10. The liquid crystal display device 10 is integrally configured by bonding a liquid crystal panel 3 and a translucent front substrate 4 with a photo-curing translucent adhesive 5. In the liquid crystal panel 3, an upper light-transmitting substrate 1 and a lower light-transmitting substrate 2 are bonded with a liquid crystal layer (not shown) interposed therebetween. The front substrate 4 protrudes in plan view as viewed from above the outer peripheral edge of the upper light transmitting substrate 1 constituting the liquid crystal panel 3. A light shielding film 6 is formed on the outer peripheral surface of the front substrate 4 on the liquid crystal panel 3 side. The light-shielding film 6 includes an outer peripheral light-shielding film 6b formed in the outer peripheral region of the front substrate 4 and an inner peripheral light-shielding film 6a formed inside thereof. The outer peripheral light-shielding film 6 b is formed in the outer peripheral region of the front substrate 4 that protrudes outward in plan view from the outer peripheral end of the upper light-transmitting substrate 1. The inner peripheral light-shielding film 6 a is formed in a region on the inner side in a plan view from the outer peripheral end of the upper light transmitting substrate 1. A parting line 7 is formed on the inner side of the inner peripheral light-shielding film 6a in plan view. That is, the inside of the parting line 7 constitutes the display area 8.

  The visible light transmittance of the inner peripheral light-shielding film 6a is set higher than the transmittance of the outer peripheral light-shielding film 6b. For example, the visible light transmittance of the inner peripheral light-shielding film 6a is set in a range of 0.1% to 10%. Further, it is preferably set in the range of 0.5% to 10%. More preferably, it is set to about 5%. On the other hand, the outer peripheral light-shielding film 6b is set to have a lower transmittance than the inner peripheral light-shielding film 6a. Thereby, when light is irradiated from the upper part of the front substrate 4, the translucent adhesive 5 filled in the lower region of the inner peripheral light-shielding film 6a promotes the curing reaction. The translucent adhesive 5 filled in the lower region of the outer periphery light-shielding film 6b accelerates the curing reaction by irradiating light from the lateral direction. That is, the translucent adhesive 5 can be caused to undergo a curing reaction over the entire lower region of the light-shielding film 6. As a result, the stress applied to the surface of the upper translucent substrate 1 of the liquid crystal panel 3 is made uniform, and the occurrence of color unevenness in the liquid crystal panel 3 can be suppressed. At the same time, since the outer peripheral light-shielding film 6b has a low transmittance, leakage light irradiated from the lower end portion of the liquid crystal panel 3 can be prevented from being transmitted to the upper surface side of the front substrate 4.

  Here, a glass plate is used as the front substrate 4. Moreover, it can replace with a glass plate and can use the touch panel which can input information from a transparent plastic plate or a display surface. As the light curable translucent adhesive 5, a UV curable or visible light curable adhesive can be used. As the liquid crystal panel 3, a TN liquid crystal panel, an STN liquid crystal panel, or a TFT liquid crystal panel can be used. Further, the liquid crystal panel 3 can be used in an IPS (In-Place-Switching) method or an FFS (Fringe-Field-Switching) method. As the light shielding film 6, a printed film formed by printing, a metal film formed by vapor deposition, or a light shielding tape can be used. In short, the outer periphery light-shielding film 6b prevents light entering from below from being transmitted upward, and the inner periphery light-shielding film 6a is light-transmitting located below when irradiated with light energy from above. It is only necessary to cause a curing reaction in the adhesive 5.

  Note that the front substrate 4 does not need to protrude from the outer peripheral edge of the liquid crystal panel 3 in plan view around the entire periphery of the liquid crystal panel 3, and one side may protrude or two opposite sides may protrude. Moreover, you may protrude in the planar view outer side from either one edge part of the upper translucent board | substrate 1 and the lower translucent board | substrate 2 which comprises the liquid crystal panel 3. FIG. For example, in the case shown in FIG. 1A, the right end portion of the front substrate 4 protrudes outward in plan view at the right end portion of the upper light-transmitting substrate 1, but the right end portion of the lower light-transmitting substrate 2 is the front end. Projecting outward from the right end of the substrate 4.

  Hereinafter, the Example which concerns on this invention is described concretely using FIGS.

  (Embodiment 1) FIG. 2 is a schematic longitudinal sectional view showing a liquid crystal display device 10 according to Embodiment 1 of the present invention. The same portions or portions having the same function are denoted by the same reference numerals. In FIG. 2, a UV light curable translucent adhesive 5 is filled between the front substrate 4 made of a glass plate and the liquid crystal panel 3, and the front substrate 4 and the liquid crystal panel 3 are integrally formed. Yes. In the liquid crystal panel 3, an upper light-transmitting substrate 1 and a lower light-transmitting substrate 2 made of a glass plate are bonded together by forming a gap with a sealing material 14, and the liquid crystal is filled in the gap to form a liquid crystal layer 11. Has been. An upper polarizing plate 12 is attached to the upper surface of the upper light transmitting substrate 1, and a lower polarizing plate 13 is attached to the lower surface of the lower light transmitting substrate 2. A driver IC 15 for driving the liquid crystal layer is mounted on the upper surface of the right end portion of the lower light transmitting substrate 2. The liquid crystal molecules of the liquid crystal layer 11 change the alignment direction according to the drive signal supplied from the driver IC 15, and the change in the alignment direction is visualized by the upper polarizing plate 12 and the lower polarizing plate 13.

  The outer peripheral edge of the front substrate 4 protrudes outward in plan view from the outer peripheral edge of the upper transparent substrate 1 of the liquid crystal panel 3. That is, the front substrate 4 is larger than the outer shape of the upper translucent substrate 1. A first light-shielding film 9a containing carbon black is printed on the outer peripheral surface of the front substrate 4 on the liquid crystal panel 3 side, and a second light-shielding film 9b containing carbon black is further laminated and printed. The first light-shielding film 9 a extends from the outer peripheral end of the front substrate 4 to the end of the upper polarizing plate 12 on the inner side in a plan view than the outer peripheral end of the upper light-transmitting substrate 1. The second light-shielding film 9 b that is laminated and printed on the first light-shielding film 9 a extends from the outer peripheral edge of the front substrate 4 to the inner side of the outer peripheral edge of the upper light-transmitting substrate 1. Therefore, the outer periphery light-shielding film 6b is a region where the first light-shielding film 9a and the second light-shielding film 9b are laminated, and the inner periphery light-shielding film 6a is a region of the single-layer first light-shielding film 9a. The inner peripheral edge of the first light-shielding film 9 a becomes a parting line 7, and the inner side becomes a display area 8.

  The visible light transmittance of each of the first light-shielding film 9a and the second light-shielding film 9b is set in a range of 0.1% to 10%. Therefore, the inner peripheral light-shielding film 6a has a higher transmittance than the outer peripheral light-shielding film 6b having a two-layer structure. A light-transmitting adhesive 5 is filled between the front substrate 4 and the liquid crystal panel 3 and irradiated with UV light of, for example, 6000 mJ from above the front substrate 4. The UV light is irradiated to the area below the inner peripheral light-shielding film 6 a together with the display area 8. Thereby, the translucent adhesive 5 in the region is cured. Then, UV light is irradiated from the lateral direction of the front substrate 4 to cure the translucent adhesive 5 in the region below the outer light shielding film 6b. As a result, the light-transmitting adhesive 5 in the entire lower region of the inner peripheral light-shielding film 6a and the outer peripheral light-shielding film 6b is cured, so that a uniform stress is applied to the upper light-transmitting substrate 1 and the color unevenness of the liquid crystal panel 3 Occurrence can be suppressed. In particular, color unevenness can be prevented from appearing in the display area 8. Further, since the outer periphery light-shielding film 6b has a two-layer structure of the first light-shielding film 9a and the second light-shielding film 9b, the light transmittance is reduced, and the back leaks from the vicinity of the outer periphery of the upper light-transmitting substrate 1. It is possible to prevent the light leakage light from being transmitted above the front substrate 4. The visible light transmittance of the first light-shielding film 9a is preferably set in the range of 0.5% to 10%, more preferably approximately 5%. Thereby, the uncured region of the translucent adhesive 5 can be eliminated.

  Here, the first light-shielding film 9a and the second light-shielding film 9b are formed by printing. Alternatively, the first light-shielding film 9a may be a metal film and the second light-shielding film 9b may be a printing film. Alternatively, both films may be metal films. Further, both the first light-shielding film 9a and the second light-shielding film 9b do not have to be homogeneous semi-permeable films, and may have, for example, a mesh structure. That is, the fine structure may have a structure in which the transmittance is determined by the area ratio of the area that transmits light and the area that does not transmit light.

  (Embodiment 2) FIG. 3 is a schematic longitudinal sectional view of a liquid crystal display device 10 according to Embodiment 2 of the present invention. 3 is different from FIG. 2 in that a black color filter layer is formed on the inner surface of the upper transparent substrate 1 of the liquid crystal panel 3 on the outer peripheral side of the parting line 7. Since the other configuration has already been described with reference to FIG. The same reference numerals are assigned to the same parts or parts having the same function.

  When the liquid crystal display device 10 is a color display panel, a color filter film is formed on each pixel. A black color filter layer 16 was formed on the inner surface of the upper light-transmitting substrate 1 outside the parting line 7, that is, outside the display region 8. Thereby, when the display surface is viewed from above the front substrate 4, the inner peripheral light-shielding film 6a and the outer peripheral light-shielding film 6b can be separated and cannot be seen. Further, when leakage light from the lower backlight is incident on the outer peripheral portion of the liquid crystal panel 3, the leakage light is prevented from reaching the inner light shielding film 6a.

  Since the inner peripheral light-shielding film 6a and the outer peripheral light-shielding film 6b having different transmittances are formed on the outer peripheral part of the front substrate 4, the outer peripheral part of the liquid crystal panel 3 below the light-shielding film 6 is a white surface. In this case, the boundary between the inner light-shielding film 6a region and the outer light-shielding film 6b region can be seen, and the design is deteriorated. Further, in the case where leakage light from the lower backlight leaks from the outer peripheral end portion of the liquid crystal panel 3, the inner peripheral light shielding film 6a is translucent and leaks to the outside of the front substrate 4 to display the display surface. The design of is degraded. The black color filter layer 16 is installed to prevent such a phenomenon.

  (Embodiment 3) FIG. 4 is a schematic longitudinal sectional view of a liquid crystal display device 10 according to Embodiment 3 of the present invention. The same reference numerals are assigned to the same parts or parts having the same function. In FIG. 4, a different part from FIG. 2 is a light-shielding sheet 17 in a region from the outer peripheral edge of the upper polarizing plate 12 attached to the upper light-transmitting substrate 1 of the liquid crystal panel 3 to the outer peripheral edge of the upper light-transmitting substrate 1. Is the point that formed. The light shielding sheet 17 has adhesiveness and was formed by being attached to the upper light transmitting substrate 1. Moreover, the reflection of light on the surface can be reduced by mixing carbon black into the light shielding sheet 17 or printing the ink containing carbon black on the surface thereof. The other configuration has already been described with reference to FIG.

  The light shielding sheet 17 is not formed on the upper or lower part of the upper polarizing plate 12 outside the parting line 7, but may be formed so that the light shielding sheet 17 and the end of the upper polarizing plate 12 overlap each other. . By forming the light-shielding sheet 17, reflection from the outer peripheral surface of the upper light-transmitting substrate 1 is reduced. Therefore, even when the inner light-shielding film 6a transmits light, the display surface is viewed from above the front substrate 4. The inner peripheral light-shielding film 6a and the outer peripheral light-shielding film 6b do not appear to be separated from each other. Further, since the light leaking from the lower backlight can be blocked by the light shielding sheet 17, it is possible to prevent the display surface from being deteriorated due to the light leakage.

  (Embodiment 4) FIG. 5 is an explanatory view of a liquid crystal display device 10 according to Embodiment 4 of the present invention. FIG. 5A is a schematic longitudinal sectional view of the liquid crystal display device 10, and FIGS. 5B and 5C are schematic longitudinal sectional views of the conductive adhesive sheet. The same portions or portions having the same function are denoted by the same reference numerals.

  As shown in FIG. 5A, a metal frame 18 was inserted in the outer peripheral region between the front substrate 4 and the liquid crystal panel 3. The front substrate 4, the liquid crystal panel 3, and the metal frame 18 are integrally formed by being bonded with a light-transmitting adhesive 5. A glass substrate was used as the front substrate 4. The translucent adhesive 5 is a UV curable adhesive. In the liquid crystal panel 3, an upper translucent substrate 1 made of a glass substrate and a lower translucent substrate 2 made of a glass substrate are bonded with a sealing material 14 so as to form a gap. A liquid crystal layer 11 is sandwiched between the gaps. A transparent conductive film 23 made of antistatic ITO is formed on the entire surface of the upper light-transmitting substrate 1 over the entire surface. An upper polarizing plate 12 is attached on the transparent conductive film 23, and a lower polarizing plate 13 is attached on the lower surface of the lower light-transmitting substrate 2. A driver IC 15 for driving the liquid crystal layer is mounted on the upper surface of the right end portion of the lower light transmitting substrate 2.

  The outer peripheral edge of the front substrate 4 protrudes outward in plan view from the outer peripheral edge of the upper transparent substrate 1 of the liquid crystal panel 3. That is, the front substrate 4 is larger than the outer shape of the upper translucent substrate 1. An outer peripheral light-shielding film 6b and an inner peripheral light-shielding film 6a are formed on the outer peripheral surface of the front substrate 4 on the liquid crystal panel 3 side. The inner peripheral light-shielding film 6a has a higher visible light transmittance than the outer peripheral light-shielding film 6b. The inner peripheral light-shielding film 6 a extends from the inner side in plan view to the outer peripheral end of the upper polarizing plate 12 from the outer peripheral end of the upper translucent substrate 1. The outer peripheral light-shielding film 6 b extends from the outer peripheral edge of the front substrate 4 to the inner peripheral light-shielding film 6 a inside the outer peripheral edge of the upper light transmitting substrate 1. A conductive adhesive sheet 19 is attached to the surface from the outer peripheral edge of the upper translucent substrate 1 to the outer peripheral edge of the upper polarizing plate 12, and the transparent conductive film 23 and the metal frame 18 are electrically connected. Yes.

  Thus, in the case where the metal frame 18 having a certain thickness is inserted between the front substrate 4 and the liquid crystal panel 3, the region 24 at the tip of the metal frame 18 is irradiated from the lateral direction. It becomes a shadow of UV light. Therefore, the translucent adhesive 5 in the region 24 is difficult to be cured. Therefore, as in the present invention, the inner peripheral light-shielding film 6a is made more transparent than the outer peripheral light-shielding film 6b, and the light transmitted through the region 24 is irradiated with UV light irradiated from above the front substrate 4. The adhesive 5 is cured. As a result, the stress applied to the surface of the upper light-transmitting substrate 1 can be made uniform, color unevenness generated in the liquid crystal panel 3 can be reduced, and color unevenness can be prevented from occurring in the display region.

  As shown in FIG. 5B, the conductive adhesive sheet 19 has a structure in which the conductor 21 is sandwiched by the adhesive material 20. The adhesive 20 is made conductive by mixing Ni powder. The conductor 21 is a copper foil or an aluminum thin film. That is, a conductive pressure-sensitive adhesive sheet having a light shielding property is formed. Since it has light shielding properties, it is possible to block light leaked from the backlight below. Moreover, as shown in FIG.5 (c), the black printing film | membrane 22 is inserted between the adhesive material 20 and the conductor 21, and surface reflection is reduced with light-shielding property. Thereby, when the display surface is viewed from above the front substrate 4, it is possible to prevent the design from being deteriorated due to the boundary between the inner peripheral light-shielding film 6a and the outer peripheral light-shielding film 6b being visible.

It is a figure for demonstrating the liquid crystal display device based on the Example of this invention. It is a typical longitudinal cross-sectional view of the liquid crystal display device based on the Example of this invention. It is a typical longitudinal cross-sectional view of the liquid crystal display device based on the Example of this invention. It is a typical longitudinal cross-sectional view of the liquid crystal display device based on the Example of this invention. It is a typical longitudinal cross-sectional view of the liquid crystal display device based on the Example of this invention. It is a typical longitudinal cross-sectional view of a conventionally well-known liquid crystal display device. It is a typical longitudinal cross-sectional view of a conventionally well-known liquid crystal display device. It is a typical top view of a conventionally well-known liquid crystal display device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper light-transmitting substrate 2 Lower light-transmitting substrate 3 Liquid crystal panel 4 Front substrate 5 Light-transmitting adhesive 6 Light-shielding film 7 Parting line 8 Display area 9a First light-shielding film 9b Second light-shielding film 10 Liquid crystal display device

Claims (7)

In a liquid crystal display device integrally formed by bonding a light-transmitting front substrate and a liquid crystal panel having a liquid crystal layer sandwiched between two light-transmitting substrates with a light-curable light-transmitting adhesive,
The front substrate is configured to protrude outward in plan view from the outer peripheral edge of one or both of the translucent substrates constituting the liquid crystal panel, and the liquid crystal panel side surface outer peripheral region of the front substrate has the liquid crystal A light-shielding film that partitions the display area of the panel is formed,
The light-shielding film includes an outer peripheral light-shielding film formed in a region protruding outward in plan view from the outer peripheral end of one or both light-transmitting substrates constituting the liquid crystal panel, and inner in plan view than the outer peripheral end. The inner periphery light shielding film formed in the area of
The liquid crystal display measure, wherein the inner peripheral light-shielding film has higher light transmittance than the outer peripheral light-shielding film.   2. The liquid crystal display device according to claim 1, wherein the inner peripheral light-shielding film has a visible light transmittance of 0.1% to 10%.   The liquid crystal display device according to claim 1, wherein a black color filter is formed along an outer periphery of one of the translucent substrates constituting the liquid crystal panel. A polarizing plate is attached to the surface of the translucent substrate constituting the liquid crystal panel on the front substrate side on the inner side in a plan view than the outer peripheral end of the translucent substrate,
The light-shielding sheet is affixed on the surface of the said translucent board | substrate between the outer peripheral edge of the said polarizing plate, and the outer peripheral edge of the said translucent board | substrate. 2. A liquid crystal display device according to item 1.   A metal frame is inserted between the light-shielding film of the front substrate and the liquid crystal panel, and the metal frame, the front substrate, and the liquid crystal panel are bonded and integrated with the light-transmitting adhesive. The liquid crystal display device according to claim 1, wherein the liquid crystal display device is a liquid crystal display device. A transparent conductive film is formed on the surface of the translucent substrate located on the front substrate side, and a polarizing plate is pasted on the transparent conductive film on the inner side in a plan view from the outer peripheral edge of the translucent substrate. And
A conductive light shielding sheet is attached to the surface of the transparent conductive film between the outer peripheral edge of the polarizing plate and the outer peripheral edge of the translucent substrate,
The liquid crystal display device according to claim 5, wherein the metal frame and the transparent conductive film are electrically connected via the conductive light shielding sheet.   The liquid crystal display device according to claim 4, wherein the light shielding sheet includes a light shielding printing film.

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