JP2018106093A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device in which a circuit component mounted on a flexible wiring member is less likely to be damaged. A display panel 10 displays an image. The case body 30 accommodates the display panel 10. The flexible wiring member 40 is connected to the display panel 10. The circuit component 50 is mounted on the flexible wiring member 40. The case body 30 has a recess 32c that prevents the circuit component 50 from coming into contact with the case body 30. The circuit component 50 is located in the recess 32c of the case body 30. The flexible wiring member 40 has a ground wiring portion that covers the recess 32c. The flexible wiring member 40 is provided at least at a location corresponding to the circuit component 50, and has a shield plate 60 that is wider than the recess 32c. [Selection diagram] Fig. 1

Description

  The present invention relates to a display device in which a flexible wiring member is connected to a display panel.

  Conventionally, various display devices including a liquid crystal display panel for displaying an image have been proposed. For example, Patent Document 1 discloses the display device. The display device disclosed in Patent Document 1 includes a liquid crystal display panel and a backlight that transmits and illuminates the liquid crystal display panel in a case body. A flexible wiring member is connected to the liquid crystal display panel, and various circuit members are mounted on the flexible wiring member.

JP 2006-38900 A

  However, a part of the flexible wiring member is arranged along the rear surface of the case body, and the circuit components mounted on the flexible wiring member are exposed from the case body. There was a risk of damage to the circuit components when touched. Further, since the circuit component mounted on the flexible wiring member is exposed from the case body, electromagnetic noise generated by the circuit component may adversely affect other devices around the display device.

The present invention is mounted on a display panel 10 for displaying an image, a case body 30 for housing the display panel 10, a flexible wiring member 40 connected to the display panel 10, and the flexible wiring member 40. Circuit component 50, and
The case body 30 has a recess 32c that prevents the circuit component 50 from coming into contact with the case body 30, and the circuit component 50 is located in the recess 32c of the case body 30. .

  The present invention includes a display panel 10 that displays an image, a light emitting element 21 that emits illumination light that illuminates the display panel 10, a case body 30 that houses the display panel 10, and a light emitting element 21 that can be connected to the light emitting element 21. The case body 30 includes a flexible wiring member 28 and a circuit component 50 mounted on the flexible wiring member 28, and the case body 30 prevents the circuit component 50 from coming into contact with the case body 30. And the circuit component 50 is located in the recess 32c of the case body 30.

  Further, the present invention is characterized in that the flexible wiring members 40 and 28 include ground wiring portions 44 and 28d that cover the concave portion 32c.

  Further, the present invention is characterized in that the flexible wiring members 40 and 28 are provided at least at locations corresponding to the circuit components 50 and have a shield plate 60 that is wider than the concave portion 32c.

  Since the circuit component mounted on the flexible wiring member is located in the concave portion of the case body, there is little risk of damage to the circuit component.

Sectional drawing which shows 1st embodiment of this invention. The block diagram which shows embodiment same as the above. The principal part expanded sectional view which shows embodiment same as the above. The principal part enlarged view which shows embodiment same as the above. Sectional drawing which shows 2nd embodiment of this invention. The principal part expanded sectional view which shows embodiment same as the above. The principal part expanded sectional view which shows other embodiment of this invention.

  An embodiment in which the present invention is applied to a liquid crystal display device will be described below with reference to the accompanying drawings. 1 to 4 show a first embodiment. The liquid crystal display device includes a liquid crystal display panel (display panel) 10, a backlight 20, a case body 30, a flexible wiring member 40, and the like.

  The liquid crystal display panel 10 has a polarizing plate (not shown) attached to both front and rear surfaces of a TFT type liquid crystal panel in which liquid crystal is sealed in a pair of glass substrates 11 on which transparent electrodes are formed. Such vehicle information is displayed as an image. A flexible wiring member 40 is connected to the liquid crystal display panel 10.

  The backlight 20 includes a light emitting element 21, a wiring board 22, a light guide plate 23, a light reflection sheet 24, and a light diffusion sheet 25. The backlight 20 is disposed on the rear side of the liquid crystal display panel 10 and illuminates and transmits the liquid crystal display panel 10. The light emitting element 21 is formed of a light emitting diode that emits white light and is mounted on the wiring board 22. The light emitting element 21 irradiates the side end surface 23 a of the light guide plate 23 with illumination light, and the illumination light is guided to the rear side of the liquid crystal display panel 10 by the light guide plate 23.

  The light guide plate 23 is made of a translucent resin such as acrylic and has a flat plate shape. The light guide plate 23 is disposed on the rear side of the liquid crystal display panel 10 and is parallel to the liquid crystal display panel 10. The light reflecting sheet 24 is disposed on the rear surface of the light guide plate 23 and reflects the illumination light emitted from the light emitting element 21 forward. The light diffusion sheet 25 is disposed on the front surface of the light guide plate 23 and diffuses illumination light emitted from the front surface of the light guide plate 23.

  The case body 30 is made of a metal such as aluminum or stainless steel, and has a front case 31 and a rear case 32. The front case 31 includes a front surface portion 31b and a side surface portion 31c, and an opening 31a for visually recognizing the screen of the liquid crystal display panel 10 is formed in the front surface portion 31b. The rear case 32 is a bottomed casing having a side wall portion 32a and a bottom wall portion 32b. A recess 32c is formed in the rear surface 32d of the rear case 32, and a circuit component 50 described later is located in the recess 32c. The bottom wall portion 32b of the rear case 32 has a predetermined thickness T1, but the recessed portion 32c is thinner than the predetermined thickness T1.

  The flexible wiring member 40 is connected to the liquid crystal display panel 10. A part of the flexible wiring member 40 is adhered by a double-sided adhesive tape so as to follow the rear surface 32d of the bottom wall portion 32b of the rear case 32. Various circuit components 50 are mounted on the flexible wiring member 40. One end 40a of the flexible wiring member 40 is connected to the liquid crystal display panel 10, and the other end 40b of the flexible wiring member 40 is connected to a circuit board (not shown). A shield plate 60 made of metal is attached to the flexible wiring member 40.

  FIG. 2 is a block diagram showing an electrical configuration of the liquid crystal display device. The microcomputer 80 has a CPU 81, a nonvolatile memory 82, and a volatile memory 83. The nonvolatile memory 82 is composed of, for example, a flash memory, and the volatile memory 83 is composed of, for example, an SDRAM (Synchronous Dynamic Random Access Memory).

  The speed sensor 101 detects the vehicle speed and outputs speed data to the microcomputer 80. The rotation sensor 102 detects the rotation speed of the engine and outputs rotation speed data to the microcomputer 80. The microcomputer 80 controls the display controller 70 and drives the light emitting element 21 based on a predetermined program stored in the nonvolatile memory 82. The display controller 70 displays an image on the liquid crystal display panel 10 based on the control signal output from the microcomputer 80.

  FIG. 3 is an enlarged view of a main part in the vicinity of the recess 32c. The flexible wiring member 40 includes a base material 41, a wiring part 42, an insulating layer 43, a ground wiring part 44, and an insulating layer 45. The base material 41 of the flexible wiring member 40 is a base film made of an insulating material such as polyimide. The wiring portion 42 of the flexible wiring member 40 is made of a conductive material such as a copper foil and is formed on the front surface of the base material 41.

  The insulating layer 43 of the flexible wiring member 40 is made of an insulating material such as polyimide and is formed on the front surface of the wiring portion 42. The ground wiring portion 44 of the flexible wiring member 40 is made of a conductive material such as copper foil and is formed on the rear surface of the base material 41. The insulating layer 45 of the flexible wiring member 40 is made of an insulating material such as polyimide and is formed on the rear surface of the ground wiring portion 44.

  The circuit component 50 is a component such as a diode, resistor, capacitor, transistor, or inductor, and is mounted on the flexible wiring member 40. The circuit component 50 is electrically connected to the wiring portion 42 of the flexible wiring member 40. The circuit component 50 is located in the recess 32c of the bottom wall portion 32b, and the circuit component 50 does not contact the bottom wall portion 32b.

  The shield plate 60 is made of a metal such as aluminum and has a rectangular flat plate shape. The shield plate 60 is affixed to the flexible wiring member 40 and also acts as a reinforcing member that reinforces the flexible wiring member 40. The horizontal width W1 of the shield plate 60 is larger than the horizontal width W2 of the concave portion 32c, and the vertical width W3 of the shield plate 60 is larger than the vertical width W4 of the concave portion 32c (see FIG. 4).

  In the first embodiment, a liquid crystal display panel (display panel) 10 that displays an image, a case body 30 that houses the liquid crystal display panel (display panel) 10, and a flexible connection that is connected to the liquid crystal display panel (display panel) 10. The case body 30 includes a recess 32c that prevents the circuit component 50 from coming into contact with the case body 30, and a circuit component 50 mounted on the flexible wiring member 40. The component 50 is located in the recess 32c of the case body 30, and there is little possibility that the circuit component 50 is damaged.

  Further, the flexible wiring member 40 has a ground wiring portion 44 that covers the concave portion 32c, and can block a part of the electromagnetic noise generated by the circuit component 50, and can be used for other devices around the display device. There is little possibility of giving electromagnetic noise.

  5 and 6 show a second embodiment. The liquid crystal display device includes a liquid crystal display panel (display panel) 10, a backlight 20, a case body 30, a flexible wiring member 40, and the like.

  The liquid crystal display panel 10 has a polarizing plate (not shown) attached to both front and rear surfaces of a TFT type liquid crystal panel in which liquid crystal is sealed in a pair of glass substrates 11 on which transparent electrodes are formed. Such vehicle information is displayed as an image. A flexible wiring member 40 is connected to the liquid crystal display panel 10.

  The backlight 20 includes a light emitting element 21, a flexible wiring member 28, a light guide plate 23, a light reflection sheet 24, and a light diffusion sheet 25. The backlight 20 is disposed on the rear side of the liquid crystal display panel 10 and illuminates and transmits the liquid crystal display panel 10. The light emitting element 21 is formed of a light emitting diode that emits white light, and is mounted on the flexible wiring member 28. The light emitting element 21 irradiates the side end surface 23 a of the light guide plate 23 with illumination light, and the illumination light is guided to the rear side of the liquid crystal display panel 10 by the light guide plate 23.

  The light guide plate 23 is made of a translucent resin such as acrylic and has a flat plate shape. The light guide plate 23 is disposed on the rear side of the liquid crystal display panel 10 and is parallel to the liquid crystal display panel 10. The light reflecting sheet 24 is disposed on the rear surface of the light guide plate 23 and reflects the illumination light emitted from the light emitting element 21 forward. The light diffusion sheet 25 is disposed on the front surface of the light guide plate 23 and diffuses illumination light emitted from the front surface of the light guide plate 23.

  A part of the flexible wiring member 28 is adhered by a double-sided adhesive tape so as to follow the rear surface 32d of the bottom wall portion 32b of the rear case 32. Various circuit components 50 are mounted on the flexible wiring member 28. A shield plate 60 made of metal is attached to the flexible wiring member 28.

  The case body 30 is made of a metal such as aluminum or stainless steel, and has a front case 31 and a rear case 32. The front case 31 includes a front surface portion 31b and a side surface portion 31c, and an opening 31a for visually recognizing the screen of the liquid crystal display panel 10 is formed in the front surface portion 31b. The rear case 32 is a bottomed casing having a side wall portion 32a and a bottom wall portion 32b. A recess 32c is formed in the rear surface 32d of the rear case 32, and a circuit component 50 described later is located in the recess 32c. The flexible wiring member 40 is connected to the liquid crystal display panel 10.

  FIG. 6 is an enlarged view of a main part in the vicinity of the recess 32c. The flexible wiring member 28 includes a base material 28a, a wiring portion 28b, an insulating layer 28c, a ground wiring portion 28d, and an insulating layer 28e. The base material 28a of the flexible wiring member 28 is a base film made of an insulating material such as polyimide. The wiring portion 28b of the flexible wiring member 28 is made of a conductive material such as a copper foil, and is formed on the front surface of the base material 28a.

  The insulating layer 28c of the flexible wiring member 28 is made of an insulating material such as polyimide, and is formed on the front surface of the wiring portion 28b. The ground wiring portion 28d of the flexible wiring member 28 is made of a conductive material such as copper foil, and is formed on the rear surface of the base material 28a. The insulating layer 28e of the flexible wiring member 28 is made of an insulating material such as polyimide, and is formed on the rear surface of the ground wiring portion 28d.

  The circuit component 50 is a component such as a diode, a resistor, a capacitor, a transistor, or an inductor, and is mounted on the flexible wiring member 28. The circuit component 50 is electrically connected to the wiring portion 28 b of the flexible wiring member 28. The circuit component 50 is located in the recess 32c of the bottom wall portion 32b, and the circuit component 50 does not contact the bottom wall portion 32b.

  The shield plate 60 is made of a metal such as aluminum and has a rectangular flat plate shape. The shield plate 60 is affixed to the flexible wiring member 28 and also acts as a reinforcing member that reinforces the flexible wiring member 28.

  The second embodiment accommodates a liquid crystal display panel (display panel) 10 that displays an image, a light emitting element 21 that emits illumination light that illuminates the liquid crystal display panel (display panel), and a liquid crystal display panel (display panel) 10. A case body 30, a flexible wiring member 28 connected to the light emitting element 21, and a circuit component 50 mounted on the flexible wiring member 28 are provided. The circuit component 50 is located in the recess 32c of the case body 30, and the circuit component 50 is less likely to be damaged.

  Further, the flexible wiring member 28 has a ground wiring portion 28d that covers the concave portion 32c, and can block a part of the electromagnetic noise generated by the circuit component 50, and can be used for other devices around the display device. There is little possibility of giving electromagnetic noise.

  The present invention is not limited to the first and second embodiments, and various modifications can be made. For example, in the first embodiment, the shield plate 60 is adhered to the flexible wiring member 40. However, as in the other embodiments shown in FIG. 7, the caulking portion 32k is provided on the bottom wall portion 32b. By forming and crimping the shield plate 60 to the bottom wall portion 32b, the shield plate 60 may be electrically connected to the case body 30, and a further electromagnetic shielding effect can be obtained.

  Further, in the first embodiment, the thickness of the bottom wall portion 32b in the concave portion 32c is thinner than the predetermined thickness T1, but the bottom wall portion 32b of the bottom wall portion 32b is different from the other embodiment shown in FIG. The thickness may be constant at a predetermined thickness H2. In the first embodiment, the display panel is the liquid crystal display panel 10, but may be, for example, an organic EL display panel.

10 Liquid crystal display panel (display panel)
DESCRIPTION OF SYMBOLS 20 Backlight 21 Light emitting element 28 Flexible wiring member 28d Ground wiring part 30 Case body 32c Recessed part 40 Flexible wiring member 44 Ground wiring part 50 Circuit component 60 Shield board

Claims (4)

A display panel for displaying an image, a case body for housing the display panel, a flexible wiring member connected to the display panel, and a circuit component mounted on the flexible wiring member,
The display device according to claim 1, wherein the case body has a recess that prevents the circuit component from coming into contact with the case body, and the circuit component is located in the recess of the case body. A display panel that displays an image, a light emitting element that emits illumination light that illuminates the display panel, a case body that houses the display panel, a flexible wiring member connected to the light emitting element, and the flexible Circuit components mounted on wiring members,
The display device according to claim 1, wherein the case body has a recess that prevents the circuit component from coming into contact with the case body, and the circuit component is located in the recess of the case body.   The display device according to claim 1, wherein the flexible wiring member includes a ground wiring portion that covers the concave portion.   3. The display device according to claim 1, wherein the flexible wiring member is provided at least at a position corresponding to the circuit component, and has a shield plate that is wider than the concave portion.

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