Display device

Abstract

To provide a display device in which the possibility of breakage of a TFT substrate is reduced.SOLUTION: In a display device (1), a CF substrate (20) and a TFT substrate (10) are laminated, the TFT substrate has a first side (11), the CF substrate has a second side (21) that is a side partially overlapping the first side, the CF substrate has a notch (22) between both end portions of the second side, and an FPC (52) that controls a TFT is mounted in a region on the TFT substrate corresponding to the notch.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a display device. [Background technology]

[0002] Patent Document 1 discloses a liquid crystal display device including a liquid crystal display element having liquid crystal sandwiched between a pair of substrates and a semiconductor integrated circuit device provided on the peripheral surface of one of the pair of substrates facing the liquid crystal, a frame member covering the liquid crystal display element, and a spacer provided between the frame member and the peripheral surface of the one substrate facing the liquid crystal. The spacer has a concave-convex shape on one side facing the liquid crystal display element, the semiconductor integrated circuit device is fitted into the concave portion, and an adhesive is provided on the convex portion on the surface facing the liquid crystal side of the one substrate. This configuration prevents cracks in the substrate of the liquid crystal display element during the device assembly process, thereby improving product quality. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-209054 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the display device of Patent Document 1 has a problem in that the possibility of substrate cracking is not sufficiently reduced.

[0005] An object of one embodiment of the present disclosure is to realize a display device in which the possibility of the TFT substrate being damaged is further reduced. [Means for solving the problem]

[0006] In order to solve the above problem, a display device according to one embodiment of the present disclosure includes a CF (Color Filter) substrate and a TFT (Thin Film Transistor) substrate stacked together, the TFT substrate having a first side, the CF substrate having a second side that partially overlaps the first side, the CF substrate overlapping the first side at both end portions of the second side and having a cutout between the both end portions, and an FPC (Flexible Printed Circuit) that controls the TFT is mounted in an area on the TFT substrate corresponding to the cutout. [Effects of the Invention]

[0007] According to one aspect of the present disclosure, a display device can be realized in which the possibility of the TFT substrate being damaged is reduced. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a cross-sectional view illustrating the configuration of a main part of a display device according to a first embodiment. [Figure 2] 1 is a perspective view showing an example of a CF substrate and a TFT substrate in the display device according to Embodiment 1, viewed from the CF substrate side. [Figure 3] 10 is a cross-sectional view illustrating the configuration of a main part of a display device according to a second embodiment. FIG. [Figure 4] 10 is a cross-sectional view illustrating the configuration of a main part of a display device according to a third embodiment. FIG. [Figure 5] 10 is a perspective view showing an example of a CF substrate and a TFT substrate in a display device according to Embodiment 3, viewed from the CF substrate side. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Embodiment 1] An embodiment of the present disclosure will be described in detail below.

[0010] Fig. 1 is a cross-sectional view illustrating the configuration of a main part of a display device 1 according to embodiment 1. As shown in Fig. 1, the display device 1 includes a CF (Color Filter) substrate 20 and a TFT (Thin Film Transistor) substrate 10. The CF substrate 20 and the TFT substrate 10 are stacked on top of each other.

[0011] The CF substrate 20 has a plurality of color filters (not shown) that transmit only light of a specific wavelength, including, for example, a red color filter, a green color filter, and a blue color filter.

[0012] The TFT substrate 10 has a plurality of TFTs (not shown). The TFT substrate 10 has a structure in which a plurality of TFTs are arranged on a glass substrate, for example. The plurality of TFTs are arranged corresponding to the plurality of color filters of the CF substrate 20, respectively.

[0013] The display device 1 further includes a backlight unit 40. The backlight unit 40 includes a light source 41, a bezel 42, and a fixing tape 43.

[0014] The light source 41 emits light into the CF substrate 20. The light source 41 includes a light-emitting element 41a that emits light, and a light guide plate 41b that guides the light emitted by the light-emitting element 41a and deflects it toward the CF substrate 20. Therefore, the light source 41 functions as a surface light source that emits light in a planar form toward the CF substrate 20. As the light-emitting element 41a and the light guide plate 41b, known light-emitting elements and light guide plates can be used, respectively, without any particular restrictions.

[0015] The bezel 42 is a housing that houses the light source 41. The bezel 42 is made of, for example, resin. The bezel 42 has an opening 42a through which light from the light source 41 exits. The CF substrate 20 is layered on the bezel 42 so as to cover at least a portion of the opening 42a. In the display device 1, the TFT substrate 10 is layered on the CF substrate 20 on the side opposite to the bezel 42. A method of arranging the CF substrate 20 and the TFT substrate 10 in this manner is called a flip panel method.

[0016] The fixing tape 43 fixes the CF substrate 20 to the bezel 42. As the fixing tape 43, any known fixing tape can be used without any particular restrictions.

[0017] The display device 1 further includes a PWB (Printed Wired Board) 45 on the side of the bezel 42 opposite to the TFT substrate 10 and the CF substrate 20. The PWB 45 is a circuit board that controls the overall operation of the display device 1.

[0018] The display device 1 further includes a CF polarizer 31. The CF polarizer 31 polarizes light incident on the CF substrate 20 from the backlight unit 40. The CF polarizer 31 is located on the opposite side of the CF substrate 20 from the TFT substrate 10.

[0019] The display device 1 further includes a COG (Chip On Glass) 51 and an FPC (Flexible Printed Circuit) 52. The COG 51 is a control board that controls the TFTs included in the TFT substrate 10. The FPC 52 is a flexible wiring board that connects the PWB 45 and the TFTs on the TFT substrate 10.

[0020] 2 is a perspective view showing an example of the CF substrate 20 and the TFT substrate 10 in the display device 1, viewed from the CF substrate 20 side. As shown in FIG. 2, the TFT substrate 10 has a first side 11. The CF substrate 20 has a second side 21 that partially overlaps the first side 11. The CF substrate 20 has a notch 22 between both end portions of the second side 21.

[0021] The CF substrate 20 overlaps with the TFT substrate 10 in areas other than the cutout portion 22, including both end portions of the second side 21. On the other hand, the CF substrate 20 does not overlap with the TFT substrate 10 in the cutout portion 22.

[0022] The FPC 52 is mounted in a region on the TFT substrate 10 that corresponds to the cutout portion 22. This allows the area of ​​the region where the TFT substrate 10 does not overlap with the CF substrate 20 to be smaller than when, for example, the entire first side 11 of the TFT substrate 10 does not overlap with the CF substrate 20.

[0023] When an impact is applied to the TFT substrate 10, the TFT substrate 10 may be damaged. In particular, the region of the TFT substrate 10 where the CF substrate 20 is not superimposed is more likely to be damaged by an impact than the region where the CF substrate 20 is superimposed. In other words, the region of the TFT substrate 10 where the CF substrate 20 is not superimposed is a region where the TFT substrate 10 is not reinforced by the CF substrate 20.

[0024] As described above, in the display device 1, the area where the TFT substrate 10 does not overlap with the CF substrate 20 is smaller than when the entire first side 11 of the TFT substrate 10 does not overlap with the CF substrate 20. In other words, the area of ​​the area where the TFT substrate 10 is not reinforced by the CF substrate 20 is smaller. This reduces the possibility that the TFT substrate 10 in the display device 1 will be damaged by an impact.

[0025] In the display device 1, the COG 51 is mounted on the TFT substrate 10 at a position corresponding to the cutout 22, on the side facing the bezel 42. By mounting the COG 51 in this manner in the above-described flip panel system, the display device 1 can achieve a so-called full flat structure in which the CF substrate 20 and the COG 51 do not protrude from the side opposite the bezel 42 of the TFT substrate 10.

[0026] 1, the CF substrate 20 does not cover the area of ​​the opening 42a that corresponds to the notch 22, but covers the other areas. However, the CF substrate 20 may cover the entire opening 42a.

[0027] [Embodiment 2] Other embodiments of the present disclosure will be described below. For ease of explanation, the same reference numerals will be used to designate components having the same functions as those described in the above embodiment, and the description thereof will not be repeated.

[0028] 3 is a cross-sectional view illustrating the configuration of a main part of a display device 2 according to embodiment 2. As shown in FIG. 3, the display device 2 differs from the display device 1 in the positional relationship between the TFT substrate 10 and the CF substrate 20. As described above, in the display device 1, the TFT substrate 10 is stacked on the CF substrate 20 on the side opposite to the bezel 42. In contrast, in the display device 2, the CF substrate 20 is stacked on the TFT substrate 10 on the side opposite to the bezel 42.

[0029] The display device 1 further includes a CF polarizing plate 32. The CF polarizing plate 32 polarizes the light emitted from the CF substrate 20. The CF polarizing plate 32 is located on the opposite side of the CF substrate 20 from the TFT substrate 10.

[0030] Furthermore, in the display device 2, the COG 51 is mounted on the opposite side of the bezel 42 in the area on the TFT substrate 10 corresponding to the cutout portion 22. Therefore, in the display device 2, unlike the display device 1, the CF substrate 20 and the COG 51 protrude from the surface of the TFT substrate 10 opposite the bezel 42. In other words, the structure of the display device 2 is not a so-called fully flat structure.

[0031] In the display device 2, the edges of the TFT substrate 10 are supported by a bezel 42. However, if a localized impact is applied to the COG 51 that protrudes from the TFT substrate 10, the COG 51 may be damaged. In addition, at this time, the impact may be transmitted to the TFT substrate 10 via the COG 51, potentially damaging the TFT substrate 10 as well. The larger the area around the COG 51 where the CF substrate 20 is not superimposed on the TFT substrate 10, the greater the possibility that the COG 51 and the TFT substrate 10 will be damaged by an impact to the COG 51.

[0032] In the display device 2, the COG 51 is mounted in an area on the TFT substrate 10 that corresponds to the cutout 22. That is, the CF substrate 20 overlaps the TFT substrate 10 in areas other than the cutout 22. Therefore, the area around the COG 51 where the CF substrate 20 does not overlap the TFT substrate 10 is smaller than when, for example, the entire first side 11 of the TFT substrate 10 does not overlap the CF substrate 20. This reduces the possibility of damage to the COG 51 and the TFT substrate 10 due to an impact to the COG 51.

[0033] 3, the TFT substrate 10 covers the entire opening 42a. However, it is sufficient that the TFT substrate 10 covers at least a part of the opening 42a, and it is not necessarily required that the TFT substrate 10 cover the entire opening 42a.

[0034] [Embodiment 3] Further embodiments of the present disclosure are described below.

[0035] 4 is a cross-sectional view illustrating the configuration of a main part of a display device 3 according to embodiment 3. As shown in FIG. 4, the display device 3 differs from the display device 1 in that the display device 3 includes a COF (Chip On Film) 53 instead of the COG 51 and an FPC 52A instead of the FPC 52.

[0036] The COF 53 is a control substrate that controls the TFTs included in the TFT substrate 10. That is, the function of the COF 53 is the same as that of the COG 51. However, while the COG 51 is mounted on the TFT substrate 10, the COF 53 is mounted on the FPC 52A. Specifically, the COF 53 may be mounted on the FPC 52A so as to be located on the opposite side of the bezel 42 from the TFT substrate 10.

[0037] Like the FPC 52, the FPC 52A is a flexible wiring board that connects the PWB 45 and the TFTs on the TFT substrate 10. Furthermore, as described above, in the display device 3, the COF 53 is mounted on the FPC 52A. Therefore, the FPC 52A connects the COF 53 and the TFTs on the TFT substrate 10.

[0038] The display device 3 also differs from the display device 1 in that it includes a CF substrate 20A instead of the CF substrate 20. The CF substrate 20A differs from the CF substrate 20 in that it includes a cutout portion 22A instead of the cutout portion 22.

[0039] 5 is a perspective view showing an example of the CF substrate 20A and the TFT substrate 10 in the display device 3, viewed from the CF substrate 20A side. As described above, the display device 3 does not include the COG 51. That is, the display device 3 does not require an area on the TFT substrate 10 for mounting the COG 51. Therefore, in the display device 3, as shown in FIG. 5, the cutout portion 22A can be made smaller than the cutout portion 22 in the display device 1.

[0040] By making the cutout portion 22A smaller than the cutout portion 22, the area of ​​the region where the TFT substrate 10 does not overlap with the CF substrate 20A in the display device 3 becomes smaller than the area of ​​the region where the TFT substrate 10 does not overlap with the CF substrate 20 in the display device 1. Therefore, the display device 3 further reduces the possibility that the TFT substrate 10 will be damaged by impact compared to the display device 1.

[0041] Furthermore, in the display device 3, the CF substrate 20A may overlap the TFT substrate 10 over the entire second side 21. In this case, panel terminals electrically connected to the TFTs of the TFT substrate 10 may be provided so as to penetrate the CF substrate 20A. In this case, the FPC 52A may be mounted on the CF substrate 20A so as to be connected to the panel terminals. This further reduces the possibility of the TFT substrate 10 being damaged by an impact in the display device 3.

[0042] The present disclosure is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present disclosure. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment. [Explanation of symbols]

[0043] 1, 2, 3 display device 10 TFT substrate 11 Side 1 20, 20A CF board 21 Side 2 22 Notch 40 Backlight unit 41 Light source 42 bezel 42a aperture 51 COG 52 FPC 53 COF

Claims

1. a CF (Color Filter) substrate; A TFT substrate having a TFT (Thin Film Transistor) is laminated on the substrate. the TFT substrate has a first side; the CF substrate has a second side that is a side that partially overlaps with the first side, the CF substrate overlaps the TFT substrate at both end portions of the second side and has a notch between the both end portions; A display device, wherein an FPC (Flexible Printed Circuit) for controlling the TFT is mounted in an area on the TFT substrate corresponding to the notch.

2. a backlight unit including a light source that causes light to be incident on the CF substrate and a bezel that houses the light source; the bezel has an opening through which the light exits; the CF substrate is laminated on the bezel so as to cover at least a portion of the opening; the TFT substrate is laminated on the CF substrate on the opposite side to the bezel, 2. The display device according to claim 1, further comprising a COG (Chip On Glass) for controlling the TFTs mounted on a side of the TFT substrate facing the bezel in an area corresponding to the cutout area of ​​the CF substrate.

3. a light source that causes light to be incident on the CF substrate; a bezel that houses the light source; and a backlight unit including the bezel. the bezel has an opening through which the light exits; the TFT substrate is laminated on the bezel so as to cover at least a portion of the opening; the CF substrate is laminated on the opposite side of the TFT substrate from the bezel, 2. The display device according to claim 1, wherein a COG for controlling the TFTs of the TFT substrate is further mounted on the opposite side of the bezel in an area on the TFT substrate corresponding to the area where the CF substrate is cut out.

4. a light source that causes light to be incident on the CF substrate; a bezel that houses the light source; and a backlight unit including the bezel. the bezel has an opening through which the light exits; the CF substrate is laminated on the bezel so as to cover at least a part of the opening, and the TFT substrate is laminated on the CF substrate; 2. The display device according to claim 1, wherein a COF (Chip On Film) for controlling the TFTs of the TFT substrate is mounted on the FPC.

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