JP2008107450A - Display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display apparatus of which the glass plate is not easily damaged even if heat and pressure at ACF, and external force from outside a casing are applied thereto. <P>SOLUTION: The display apparatus includes: a display unit 6 comprising a first polarizing plate 12 provided on a first glass plate and a second polarizing plate 13 provided on a second glass plate 11 in an area where the first and second glass plates are faced back to back and lapping each other, and a spacer member 16 provided on the surface of the second glass 11 and adjacent to the second polarizing plate 13; a casing member 17 for holding the display unit 6; a transparent window 18 covering the display unit 6 and provided in the casing member 17; and an elastic member 19 provided in a space between the transparent window 18 and the display unit 6, wherein the spacer member 16 forms a range from an area where the first and second glass plates 10, 11 do not lap each other up to an area where the glass plates lap over the first polarizing plate 12, and the elastic member is located in an area on the second glass plate where the first and second glass plates do not lap each other. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a display device and a display device provided with the same, for example, holding a display device for displaying images, characters, maps, etc., such as a mobile phone, a PDA, a portable terminal such as a notebook computer, an in-vehicle monitor, etc. Concerning structure.

A conventional display mounting structure is shown in FIG. FIG. 6A is a plan view showing a conventional display mounting structure. FIG. 6B is a side view of FIG. In FIG. 6, the two glass plates 102 and 103 constituting the display (LCD) 101 have a region that overlaps each other (range of arrow P) and a region that does not overlap each other (range of arrow Q), A driver 104 for driving the LCD 101 is mounted in the non-overlapping area. In the holding structure of the LCD 101, the LCD 101 is held by bonding and fixing to an LCD backlight module 107 having a light source 105 and a light guide member 106 that guides light from the light source 105 to the LCD 101. Polarizers 108 and 109 are provided in the overlapping region P and the non-overlapping region Q of the back glass plate 103 on which the driver IC 104 is mounted, and the polarizing plate 109 in the non-overlapping region P is bonded and fixed. It was used as a surface. A flexible substrate 110 is attached to the back glass plate 103 by an ACF method, for example.
(For example, refer to Patent Document 1).
JP 2003-121815 A

  However, in the LCD 101 as described above, the back polarizing plate 109 is located on the back side of the flexible substrate 110 connected to the back glass plate 103. Therefore, since heat and pressure are also applied to the back polarizing plate 109 during ACF, the back polarizing plate 109 needs to have heat resistance and compressive strength. As a result, it is necessary to use an expensive polarizing plate, which may increase the cost.

  When the display is provided in a mobile phone or the like, a cushion or the like is usually disposed between the display and a transparent window disposed in front of the display.

  The mobile phone is carried in a trouser pocket, etc. so that when the user sits on a chair, external force may be applied to the display from the outside of the housing through the cushion. There has been a demand for an arrangement method that does not easily break even when an external force is applied.

  The present invention has been made to solve the conventional problems, and provides a display device in which a glass plate is not easily broken even when heat and pressure during the ACF and external force from the outside of the housing are applied. Objective.

  The display device according to claim 1 of the present invention is a region where the first glass plate, the second glass plate larger than the first glass plate, and the back surfaces of the first and second glass plates face each other and overlap each other. A second polarizing plate provided on the surface of the first glass plate; a second polarizing plate provided on the surface of the second glass plate; and the second polarizing plate. A spacer member provided on the surface of the glass plate, a display device, a housing member for housing the display device, a transparent window provided on the housing member and covering the display device, the transparent window, An elastic member provided in a space between the display devices, the spacer member forms a range from a region where the first and second glass plates do not overlap each other to a region where the first polarizing plate overlaps, The elastic member is disposed on the second glass plate. Characterized in that arranged in the region where the first and second glass plates do not overlap each other.

  According to this configuration, first, it is possible to make it difficult for heat during ACF to be transferred to the second polarizing plate. Second, even when an external force is applied to the display, it is possible to avoid stress concentration at the boundary between the area where the first and second glass plates overlap and the area where they do not overlap.

  That is, when an external force is applied to the transparent window surface, the external force is not transmitted to the first glass plate via the elastic member, but the first and second glass plates overlap by transmitting the external force to the second glass plate. Stress concentration at the boundary between the region and the region that does not overlap can be avoided.

  As described above, since heat at the time of ACF is not easily transferred to the second polarizing plate, an inexpensive material is used for the second polarizing plate, thereby avoiding an increase in the cost of the display device. In addition, when an external force is applied, stress concentration is avoided, so that damage to the second glass plate is avoided.

  That is, the spacer member forms a range from a region where the front glass plate and the back glass plate do not overlap each other to a region where the front polarizing plate overlaps, and the cushion is arranged so as to be adjacent to the front polarizing plate. is there. In this configuration, when an external force is applied from the outside of the housing in the vicinity of the area where the two glass plates do not overlap, the stress generated in the portion where there is no front glass plate and only the back glass plate can be reduced. Even when it is stored and carried, it is avoided that the glass plate is easily broken.

  Hereinafter, an embodiment of the present invention will be described as a mobile phone provided with a display. FIG. 1 is an external view of a mobile phone according to an embodiment of the present invention. 2A and 2B show a display according to an embodiment of the present invention, in which FIG. 2A is a front view and FIG. 2B is a side view. FIG. 3 is a local sectional view of the mobile phone according to the embodiment of the present invention. FIG. 4 is a local sectional view of a conventional display device. FIG. 5A is a partially enlarged view of E in FIG. FIG. 5B is an enlarged view of part F of FIG.

In FIG. 1, a mobile phone 1 includes an upper housing 2 and a lower housing 3 that are foldably connected via a hinge portion 4. The upper housing 2 has a receiver 5 and a display 6, and the lower housing 3 has an operation unit 7, a battery unit (not shown), and a transmitter 8. The user folds when carrying it, and opens it when using it. (State of Fig. 1)
Next, a description will be given with reference to FIG. As shown in FIG. 2, the display 6 includes a first glass plate 10 (front glass plate), a second glass plate 11 (back glass plate), and a front polarizing plate 12 provided on the surface of the front glass plate 10. And a back polarizing plate 13 provided on the back surface of the back glass plate 11, a driver IC 14, and an FPC 15 (flexible wiring member). The front glass plate 10 and the back glass plate 11 have a substantially rectangular shape, and the back glass plate 11 is larger than the front glass plate 10. The reason is that since the FPC 15 and the driver IC 14 are provided on the back glass 11, one glass must be enlarged to ensure a mounting area. Therefore, in this embodiment, the back glass 11 is enlarged. A liquid crystal is sealed between the two glass plates 10 and 11 and fixed in close contact therewith. The two glass plates 10 and 11 are arranged so that the three sides are substantially the same, and the back glass plate 11 protrudes from the front glass plate 10 on one side.

  A driver IC 14 is mounted on the side facing the front glass plate 10 in the protruding portion (range A) of the back glass plate 11. The driver IC 14 is for controlling an electric signal for applying a voltage to the liquid crystal in order to display characters and the like on the display 6. On the same surface of the back glass plate 11 on which the driver IC 14 is mounted, an FPC (flexible wiring member) 15 is used for an ACF (Activated Carbon Fiber) resin in order to transmit a signal for inputting an electric signal to the driver IC 14 (FIG. (Not shown), and is electrically and physically connected to the back glass plate 11 by heat and pressure bonding. A front polarizing plate 12 is provided on the surface of the front glass plate 10 for controlling light to be transmitted. A back polarizing plate 13 is provided on the back surface of the back glass plate 11 for controlling light entering from the surface of the back polarizing plate 13.

  From the overlapping region (range B) of the front glass plate 10 and the back glass plate 11 to the back surface of the back glass plate 11 mounted with the driver IC 14 (range A), the spacer member 16 having substantially the same thickness as the back polarizing plate 13 is back polarized. It is provided adjacent to the plate 13. The spacer member 16 is provided outside the display range (C range) of the display device 6.

  The display range C indicates a range in which characters, images, and the like are actually displayed on the display device 6.

  Since the spacer member 16 firstly reduces the level difference between the back polarizing plate 13 and the back glass plate 11, it is desirable that the spacer member 16 has the same thickness or a thin thickness. If it is thick, a space is formed between the backlight module 20 and the back polarizing plate 13 when the display 6 is mounted on the backlight module 20 described later. If dust enters this space, the image quality may be deteriorated (dust can be seen through the display). Moreover, since the back glass plate 11 will be supported at both ends, it will be easily damaged when a force is applied to the center of the glass portion.

  Secondly, the driver IC 14 is used as a light-shielding material because it may cause malfunction by external light or light (including ultraviolet rays) from the backlight module 20 described later.

  Next, it demonstrates using FIG. Description of the same reference numerals is omitted. As shown in FIG. 3, the mobile phone includes a display 6, a backlight module 20, a housing 17, a transparent window 18 (LCD panel), and an elastic member 19 (cushion).

  The backlight module 20 guides light emitted from a light source (not shown) such as an LED. A display 6 is mounted on the backlight module 20. The light guided to the backlight module 20 is guided into the display from the surface of the back polarizing plate 13 and illuminates the entire display from the back. The user can visually recognize characters, images, and the like displayed on the display 6 from the outer surface of the housing 17 through the transparent window 18 by the light transmitted through the display 6.

  The casing 17 is a part of a casing member that forms the appearance of a mobile phone, and houses the backlight module 20 and the display 6.

  The LCD panel 18 is attached to the housing 17 so as to be provided above the display device 6.

  The cushion 19 has a substantially rectangular frame shape, is provided on the three sides of the front polarizing plate 12 and the driver IC 14, and has a thickness that is slightly compressed when the LCD panel 18 is attached to the housing 17.

  The cushion 19 prevents dust from entering the space D (the gap between the transparent panel and the front polarizing plate) from the outside, and reduces the force transmitted to the glass plates 10 and 11 by the external force applied to the LCD panel 18. .

  Next, the force acting on the display 6 when the external force indicated by the arrow G is applied to the LCD panel 18 will be described with reference to FIG. FIG. 5B is a diagram in which the lengths of the back polarizing plate 13 and the spacer member 16 are changed for comparison with FIG.

  FIG. 5A shows a region where the boundary between the two glass plates 10 and 11 overlaps each other (range of B) between the spacer member (a) 16 (a) and the back polarizing plate (a) 13 (a) as described above. ). In this case, when the load G acts on the LCD panel 18, the LCD panel 18 is deformed so that the gap between the LCD panel 18 and the back glass plate 11 is reduced. When the load continues to be applied from the state in which the LCD panel 18 collides with the back glass plate 11, the back glass plate 11 is formed between the back polarizing plate (a) 13 (a) and the spacer member (a) 16 (a). Deformation is performed with the boundary as a fulcrum, but the fulcrum position is in a region where the two glass plates 10 and 11 overlap each other (range B), so the two glass plates 10 and 11 that are bonded together are bent at the same time. .

  On the other hand, in FIG. 5B, when the load G acts on the LCD panel 18, the LCD panel is deformed so that the gap between the LCD panel 18 and the back glass plate 11 is reduced. When the load continues to be applied from the state in which the LCD panel 18 collides with the back glass plate 11, the back glass plate 11 has a back polarizing plate (b) 13 (b) and a spacer member (b) 16 (b). Deform using the boundary as a fulcrum. Since the fulcrum position is in a region where the two glass plates 10 and 11 do not overlap each other (range A), only the back glass plate 11 is bent. When trying to bend the two bonded glass plates 10 and 11 as compared to the case where only the back glass plate 11 is bent, the two glass plates 10 and 11 are bonded together. Therefore, since the thickness is about twice and the section modulus is about four times, the stress acting on the fulcrum is about 1/4. Since the generated bending stress is inversely proportional to the section modulus, the bending stress shown in FIG. Therefore, it is understood that FIG. 5 (a) is less likely to be damaged by external force than FIG. 5 (b).

  In addition, since the distance from the front-end | tip of the back glass plate 11 to a fulcrum is L and L + ΔL in FIGS. 5B and 5A, the bending moment is larger in this embodiment, but ΔL is Since it is minute, the above-mentioned section modulus has a great influence on the strength of the glass plate.

  In the present embodiment, the cushion 19 is provided in order to realize a structure in which dust does not easily enter above the display 6. However, for example, a structure that prevents dust from entering above the display 6 in other parts. If so, the cushion 19 is not necessarily used. In this case, in FIG. 5, the cushion 19 is configured to press the driver IC 14, but when there is no cushion, the transparent window directly presses the front glass. At that time, since the spacer member 16 is in the region B as in this embodiment, the effect of the operation of this embodiment does not change.

  The present invention is useful for an electronic device having a display screen such as a mobile phone and a portable game machine.

External view of mobile phone of the present invention Front view Side view Local cross section Local sectional view of a conventional display device Partial enlarged view of E in FIG. F part enlarged view of FIG. Figure of conventional display mounting structure

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cellular phone 2 Upper housing | casing 3 Lower housing | casing 4 Hinge part 5 Earpiece part 6 Display 7 Operation part 8 Transmission part 9 Display apparatus 10 Front glass plate 11 Back glass plate 12 Front polarizing plate 13 Back polarizing plate 13 (a) Back polarizing plate (a)
13 (b) Back polarizing plate (b)
14 Driver IC
15 FPC (flexible substrate)
16 Spacer member 16 (a) Spacer member (a)
16 (b) Spacer member (b)
17 Housing 18 Transparent window (LCD panel)
19 Elastic member (cushion)
20 Backlight module 100 Display device 101 Display 102 Front glass plate 103 Back glass plate 104 Driver IC
105 Light source 106 Light guide member 107 Backlight module 108 Front polarizing plate 109 Back polarizing plate 110 Flexible substrate 111 Housing

Claims (1)

A first glass plate, a second glass plate larger than the first glass plate, and a region where the back surfaces of the first and second glass plates face each other and overlap each other, provided on the surface of the first glass plate The first polarizing plate, the second polarizing plate provided on the surface of the second glass plate, and a spacer member provided adjacent to the second polarizing plate and provided on the surface of the second glass. A display, a housing member that accommodates the display, a transparent window that is provided on the housing member and covers the display, and an elastic member that is provided in a space between the transparent window and the display Prepared,
The spacer member forms a range from a region where the first and second glass plates do not overlap each other to a region where the first polarizing plate overlaps,
The display device, wherein the elastic member is arranged in a region where the first and second glass plates of the second glass plate do not overlap each other.

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