JP5121412B2 - Display device - Google Patents

Description

  The present invention relates to a display device that can be used in various environments.

  Display devices for outdoor installations such as marine radar equipped with a liquid crystal display device are designed to protect the liquid crystal display device from the impact of external impacts, rain, flooding and dust, etc. It is often covered with a transparent protective plate made of glass or glass and waterproofed at the periphery of the transparent protective plate. Further, by making the transparent protective plate larger than the display surface of the liquid crystal display device, the waterproof processing area around the transparent plate can be widened, so that a higher waterproof effect can be obtained.

  However, when a transparent protective plate is arranged on the surface of the liquid crystal display device, an air layer (space) is formed between the display surface and the transparent protective plate, and light incident on the display surface from the outside is reflected on the front and back surfaces of the transparent protective plate. There is a problem that the visibility is reduced due to reflection on the surface of the liquid crystal panel, and there is also a problem that condensation occurs between the display surface and the transparent protective plate due to a temperature difference between the display surface of the liquid crystal display device and the air layer or the transparent protective plate. . As a countermeasure, there is one that prevents the occurrence of condensation by providing a transparent resin or transparent adhesive material between the display surface of the liquid crystal display device and the transparent protective plate (for example, see Patent Document 1).

  In addition, for example, when fixing the liquid crystal display device after fixing the transparent protective plate to the housing, due to the pressing force of the liquid crystal display device to the transparent protective plate at the fixed position, the variation of the fixed position due to the screw tightening procedure, etc. It is considered that display unevenness is caused by a partial change in the contact pressure applied to the transparent resin or the transparent adhesive material. As a countermeasure, the transparent protective plate is made larger than the liquid crystal display device, and an elastic body such as an O-ring represented by rubber is sandwiched between the enlarged portion and the external housing. Some are held on a transparent protective plate via a transparent adhesive material or the like (see, for example, Patent Document 2).

JP 2005-316042 A JP 2006-58753 A

  In Patent Document 1, when a transparent resin or the like is provided between the display surface of the liquid crystal display device and the transparent protective plate, the contact pressure is changed between the liquid crystal display device and the transparent protective plate, so When a uniform external force is applied, there is a problem that display on the display surface is uneven.

  In Patent Document 2, since the liquid crystal device is held only on the transparent protective plate via a transparent resin or a transparent adhesive material, when the impact is applied, the transparent resin or the transparent adhesive material is peeled off or the liquid crystal panel is damaged. There is a problem with impact.

  The present invention has been made to solve these problems, and an object thereof is to provide a display device having high waterproofness, visibility, and impact resistance in various environments.

In order to solve the above problems, a display device according to the present invention includes a liquid crystal panel and a planar light source device, which are sandwiched between frames, and a transparent elastic material on the front side of the liquid crystal display device. A transparent protective plate disposed through the body, a liquid crystal display device, an external housing for storing the transparent protective plate, and a fixing part for fixing the frame of the liquid crystal display device and the transparent protective plate together to the external housing. The frame has a liquid crystal display device fixing portion fixed by a fixing component, and the liquid crystal display device fixing portion is provided in contact with the transparent protective plate, and the liquid crystal display device fixing portion and the transparent protective plate are connected to the fixing component and the outside. is sandwiched between the housing are fixed and said Rukoto.

According to the present invention, a liquid crystal display device including a liquid crystal panel and a planar light source device and sandwiching them between frames, a transparent protective plate disposed on the front side of the liquid crystal display device via a transparent elastic body, A liquid crystal display device, an external housing for storing the transparent protective plate, and a fixing component for fixing the frame of the liquid crystal display device and the transparent protective plate to the external housing together, and the frame is fixed by the fixing component a liquid crystal display device fixing unit, a liquid crystal display device fixing portion provided to be in contact with the transparent protective plate, the liquid crystal display device fixing portion and the transparent protective plate is sandwiched and fixed parts and the outer casing is fixed because, In various environments, a display device with high waterproofness, visibility, and impact resistance can be provided.

  Embodiments of the present invention will be described below with reference to the drawings.

<Embodiment 1>
FIG. 1 is a cross-sectional view showing a configuration of a display device according to Embodiment 1 of the present invention. As shown in FIG. 1, the liquid crystal panel 1 includes an upper substrate 1a and a lower substrate 1b, and a liquid crystal is sandwiched between the upper substrate 1a and the lower substrate 1b. An upper polarizing plate 2a is provided on the surface of the upper substrate 1a opposite to the liquid crystal side, and a lower polarizing plate 2b is provided on the surface of the lower substrate 1b opposite to the liquid crystal. Further, the electrode terminal portion of the liquid crystal panel 1 includes a TCP (Tape Carrier Package) 5 and a printed circuit board 6 which are flexible wiring boards electrically connected to drive the liquid crystal.

  The planar light source device includes a lamp 7, a reflector 8, a light guide plate 9, a reflection sheet 10, and an optical sheet group 11. The lamp 7 is a light source that irradiates the liquid crystal panel 1 with light. The reflector 8 is provided on the side surface of the light guide plate 9, and reflects the light emitted from the lamp 7 so as to be concentrated in one direction and radiated to the light guide plate 9. A reflection sheet 10 is provided on the back surface of the light guide plate 9, and light incident on the light guide plate 9 is irradiated to the liquid crystal panel 1 through the optical sheet group 11. The middle frame 12 positions the lamp 7, the reflector 8, the light guide plate 9, and the optical sheet group 11, and the rear frame 13 fits and holds the lamp 7, the reflector 8, the light guide plate 9, and the optical sheet group 11 with the middle frame 12. doing. The front frame 14 fits and holds the liquid crystal panel 1 disposed on the middle frame 12 with the rear frame 13. Here, the middle frame 12, the rear frame 13, and the front frame 14 are collectively referred to as a frame of the liquid crystal display device.

  The liquid crystal panel 1 is bonded to the transparent protective plate 4 by the transparent elastic body 3, and is used for waterproofing processing represented by an O-ring between the fixed component 17 and the external housing 15 via the transparent protective plate 4. The elastic body 16 is sandwiched and disposed so as to be crushed. Therefore, it is possible to prevent water droplets or dust from the outside from entering the liquid crystal display device.

  The liquid crystal display device fixing portion 18 is formed in a frame of the liquid crystal display device and has a hole. The fixing component 17 is fixed to the external housing 15 with screws 19 or the like, and has a liquid crystal display device fixing component 17a (protrusion) for fitting and fixing with the liquid crystal display device fixing portion 18. The hole provided in the liquid crystal display device fixing portion 18 and the liquid crystal display device fixing component 17a are fitted with a predetermined clearance. Therefore, the transparent protective plate 4 is fixed to the external housing 15 by the fixing component 17, and the liquid crystal display device fixing component 17a and the liquid crystal display device fixing portion 18 are fitted and held.

  From the above, the frame of the liquid crystal display device and the transparent protective plate 4 are fixed to the external housing 15 together by the fixing component 17. Therefore, even when an impact is applied due to dropping or the like, it is possible to prevent the transparent elastic body 3 from peeling off or the liquid crystal panel 1 from being damaged. In addition, since the liquid crystal display device fixing component 17a and the liquid crystal display device fixing portion 18 are held with a predetermined clearance, it is possible to alleviate stress due to misalignment when each component is attached.

<Embodiment 2>
FIG. 2 is a cross-sectional view showing a configuration of a display device according to Embodiment 2 of the present invention. As shown in FIG. 2, the liquid crystal display device fixing portion 18 is provided so as to contact the transparent protective plate 4, and the liquid crystal display device fixing portion 18 and the transparent protective plate 4 are sandwiched between the fixing component 17 and the external housing 15. Yes. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

  From the above, the liquid crystal display device fixing portion 18 and the transparent protective plate 4 can be sandwiched simultaneously by the fixing component 17.

<Embodiment 3>
The third embodiment of the present invention is characterized in that in the display device shown in FIG. 1 of the first embodiment and FIG. 2 of the second embodiment, a circuit board for operating the liquid crystal display device is installed on the fixed component 17. To do. Since other configurations are the same as those in the first and second embodiments, the description thereof is omitted.

<Embodiment 4>
FIG. 3 is a cross-sectional view showing a configuration of a display device according to Embodiment 4 of the present invention. The fourth embodiment is characterized in that the transparent protective plate 4 and the liquid crystal display device are fixed to the external housing 15 by separate components. As shown in FIG. 3, the transparent protective plate 4 is sandwiched between the fixed component 17 and the external housing 15 via the elastic body 16.

  The external frame 20 holds the liquid crystal display device by a liquid crystal display device fixing portion 18 formed on the frame of the liquid crystal display device. The external frame 20 has a liquid crystal display device fixing component 17a (projection), and the liquid crystal display device fixing portion 18 has a hole. The hole provided in the liquid crystal display device fixing portion 18 and the liquid crystal display device fixing component 17a provided in the external frame 20 are fitted with a predetermined clearance. The external frame 20 is fixed to the external housing 15 at a place not shown.

  From the above, the transparent protective plate 4 is fixed to the external housing 15 by the fixing component 17, and the liquid crystal display device is held by the external frame 20 fixed to the external housing 15. Further, since the liquid crystal display device fixing component 17a and the liquid crystal display device fixing portion 18 are held with a predetermined clearance, it is possible to alleviate stress due to misalignment when each component is attached.

<Embodiment 5>
Embodiment 5 of the present invention is characterized in that in the display device shown in FIG. 3 of Embodiment 4, a circuit board for operating the liquid crystal display device is installed on the external frame 20. Since other configurations are the same as those in the fourth embodiment, the description thereof is omitted.

It is sectional drawing which shows the structure of the display apparatus by Embodiment 1 of this invention. It is sectional drawing which shows the structure of the display apparatus by Embodiment 2 of this invention. It is sectional drawing which shows the structure of the display apparatus by Embodiment 4 of this invention.

Explanation of symbols

  1 liquid crystal panel, 1a upper substrate, 1b lower substrate, 2a upper polarizing plate, 2b lower polarizing plate, 3 transparent elastic body, 4 transparent protective plate, 5 TCP, 6 printed circuit board, 7 lamp, 8 reflector, 9 light guide plate, 10 Reflective sheet, 11 Optical sheet group, 12 Mold frame, 13 Rear frame, 14 Front frame, 15 External housing, 16 Elastic body, 17 Fixed part, 17a Liquid crystal display device fixing part, 18 Liquid crystal display device fixing part, 19 Screw, 20 External frame.

Claims (11)

LCD panel,
A planar light source device,
A liquid crystal display device in which these are sandwiched between frames;
A transparent protective plate disposed on the front side of the liquid crystal display device via a transparent elastic body;
An external housing for storing the liquid crystal display device and the transparent protective plate;
A fixing component for fixing the frame of the liquid crystal display device and the transparent protective plate together to the external housing;
Equipped with a,
The frame has a liquid crystal display device fixing portion fixed by the fixing component,
The liquid crystal display device fixing portion provided so as to be in contact with the transparent protective plate, the liquid crystal display device fixing portion and the transparent protective plate is characterized Rukoto fixed is held between the outer housing and the fixed part , Display equipment. The display device according to claim 1, wherein a circuit board for driving the liquid crystal display device is disposed on the fixed component. LCD panel,
  A planar light source device,
  A liquid crystal display device in which these are sandwiched between frames;
  A transparent protective plate disposed on the front side of the liquid crystal display device via a transparent elastic body;
  An external housing for storing the liquid crystal display device and the transparent protective plate;
  A fixing component for fixing the frame of the liquid crystal display device and the transparent protective plate together to the external housing;
With
  The frame has a liquid crystal display device fixing portion fixed by the fixing component,
  The display device according to claim 1, wherein the fixing part has a protrusion, and the liquid crystal display device fixing portion has a hole into which the protrusion is fitted. The display device according to claim 3, wherein the hole provided in the liquid crystal display device fixing portion and the protrusion provided in the fixing component are fitted with a predetermined clearance. The display device according to claim 3, wherein a circuit board for driving the liquid crystal display device is disposed on the fixed component. LCD panel,
  A planar light source device,
  A liquid crystal display device in which these are sandwiched between frames;
  A transparent protective plate disposed on the front side of the liquid crystal display device via a transparent elastic body;
  An external housing for storing the liquid crystal display device and the transparent protective plate;
  A fixing part for fixing the transparent protective plate to the external housing;
  An external frame fixed to the external casing and fixing the frame of the liquid crystal display device;
With
  The frame has a liquid crystal display device fixing portion fixed by the fixing component,
  The display device according to claim 1, wherein the external frame has a protrusion, and the liquid crystal display device fixing portion has a hole into which the protrusion is fitted. The display device according to claim 6, wherein the hole provided in the liquid crystal display device fixing portion and the protrusion provided in the external frame are fitted with a predetermined clearance. 8. The display device according to claim 6, wherein a circuit board for driving the liquid crystal display device is disposed on the external frame. LCD panel,
  A planar light source device,
  A liquid crystal display device in which these are sandwiched between frames;
  A transparent protective plate disposed on the front side of the liquid crystal display device via a transparent elastic body;
  An external housing for storing the liquid crystal display device and the transparent protective plate;
  A fixing component for fixing the frame of the liquid crystal display device and the transparent protective plate together to the external housing;
With
  The frame has a liquid crystal display device fixing portion fixed by the fixing component,
  The display device according to claim 1, wherein the fixing component is fixed to the liquid crystal display device fixing portion formed on the frame, and the transparent protective plate is fixed to the external casing. In the fixing part,
  The fixing part for fixing the liquid crystal display device fixing part formed on the frame and the fixing part for fixing the transparent protective plate to the external housing are different from each other. Display equipment. The fixed part is
  11. The display device according to claim 9, wherein the display device is fitted to the liquid crystal display device fixing portion formed on the frame with a predetermined clearance.

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