JP2014211599A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device capable of hardening the transparent resin of a portion overlapped with a non-transmission part in a relatively short time, and improving workability in the case of joining display means to a protection member.SOLUTION: A display device is configured such that display means 10 having a display part 11a for displaying predetermined information and a protection member 20 covering the display means 10 are joined with transparent resin 30 filling a space S formed between the display means 10 and the protection member 20, and that the protection member 20 includes: a translucent substrate 21 as the base material; and a non-transmission part 22 formed on the translucent substrate 21 so as to correspond to the non-display region of the display part 11a. The display device includes a casing 50 for storing the display means 10 and the protection member 20, and the casing 50 is formed with a reflection part 62b for reflecting UV light 82 to be emitted from a side opposite to the display side of the display part 11a to the display part 11a to the space S.

Description

  The present invention relates to a display device mounted on a vehicle such as an automobile.

  Conventionally, as this type of display device, for example, the one described in Patent Document 1 below is known. The display device described in Patent Document 1 includes a liquid crystal display panel (display means) having a display unit for displaying predetermined information, and a protective member that covers the liquid crystal display panel, between the liquid crystal display panel and the protective member. It is joined by a transparent resin filled in the gap formed.

  In this case, the protective member includes a light-transmitting substrate as a base material, and a light-shielding layer (non-transmitting portion) formed on the back surface of the light-transmitting substrate so as to correspond to the non-display area of the display portion. The transparent resin is filled not only in the see-through area of the translucent substrate where the light shielding layer is not formed, but also between the light shielding layer and the liquid crystal display panel. A viewer who visually recognizes the display device can see through the predetermined information through a transparent resin and a transparent area.

JP 2011-22523

  By the way, as the transparent resin, for example, an ultraviolet curable optical adhesive is used, and the transparent resin is cured by irradiating ultraviolet rays (UV light) from the front side of the protective member (that is, the front side of the display device). It has become.

However, as in the display device described in Patent Document 1, when a light shielding layer (non-transparent portion) is formed on the back surface of the protective member (translucent substrate), the transparent resin portion overlapping the fluoroscopic area is Although it can be cured, it is difficult for ultraviolet rays to reach the transparent resin part that overlaps the light shielding layer, so it takes a long time (long time) to cure the transparent resin in the part that overlaps the light shielding layer. There is a problem that workability at the time of joining the display panel (display means) and the protective member is lowered.
Therefore, in order to cope with the above-described problems, the present invention can cure the transparent resin in the portion overlapping the impermeable portion in a relatively short time, and improves the workability when joining the display means and the protective member. An object of the present invention is to provide a display device that can be improved.

  According to the present invention, a display unit having a display unit for displaying predetermined information and a protective member covering the display unit are joined by a transparent resin filled in a gap formed between the display unit and the protective member. In the display device, the protective member includes a translucent substrate serving as a base material, and a non-transparent portion formed on the translucent substrate so as to correspond to a non-display area of the display unit. A housing that houses the display means and the protective member, and the housing is irradiated with the light for curing the transparent resin that is irradiated toward the display unit from the side opposite to the display side of the display unit. A reflection portion that reflects toward the gap is formed.

  Further, the present invention provides a display unit having a display unit for displaying predetermined information and a protective member covering the display unit by a transparent resin filled in a gap formed between the display unit and the protective member. The bonded display device includes a housing that houses the display means and the protective member, and the housing includes a non-transparent portion provided to correspond to a non-display area of the display portion, and the display portion. A reflective portion is formed that reflects the light for curing the transparent resin irradiated toward the display portion from the side opposite to the display side toward the gap.

  According to the invention, the housing includes a side wall portion that surrounds the side of the display means and the protection member, and the reflection portion is configured by an inclined high reflection surface provided on the side wall portion. It is characterized by being.

  According to the present invention, the initial purpose can be achieved, the transparent resin in the portion overlapping the impermeable portion can be cured in a relatively short time, and workability when joining the display means and the protective member is improved. It is possible to provide a display device that can

1 is a front view of a display device according to a first embodiment of the present invention. AA sectional drawing of FIG. The figure which shows the state which irradiated the UV light to the components before UV irradiation of the state which removed the wiring board and 2nd case body by the said 1st Embodiment. The expanded sectional view which expands and shows the upper left part of the components before UV irradiation in FIG. Sectional drawing of the display apparatus by 2nd Embodiment of this invention. The figure which shows the state which irradiated the UV light to the components before UV irradiation of the state which removed the wiring board and 2nd case body by the said 2nd Embodiment.

(First Embodiment) A case where the display device of the present invention is applied to a vehicle instrument mounted on a vehicle will be described as an example with reference to FIGS.

  1 and 2, a vehicle meter D as a display device according to the present embodiment has a display means 10 capable of displaying various types of vehicle information and a translucent covering the surface side of the display means 10 serving as a viewer side. The protective member 20, the transparent resin 30 that joins the display means 10 and the protective member 20, the wiring board 40 located on the back side of the display means 10, the display means 10, the protective member 20, the wiring board 40, and the like are accommodated. A housing 50 is provided.

  The display means 10 includes a display element 11, a source line driving circuit (not shown) for driving the source line (signal line) of the display element 11, and a gate line for driving the gate line (scanning line) of the display element 11. A driving circuit (not shown), a light guide body 12a, a light source 12b, a first flexible wiring board 12c, and the like, are composed of an illuminating means 12 for guiding illumination light to the display element 11, the display element 11 and the light guide. A frame body 16 made of a conductive material which comprises a resin case 13 made of a substantially flat white resin for holding the body 12a, a front frame 14 and a back frame 15 and which constitutes an exterior case of the display means 10, and a wiring board Various timing signals for controlling the timings of the source line driving circuit and the gate line driving circuit are generated based on a command signal from a control means (not shown) mounted on 40. Lee timing controller (not shown) or the like and a circuit board 17 mounted.

  In this case, the frame body 16 composed of the front frame 14 and the rear frame 15 paired with the front frame 14 includes the display element 11, the light guide body 12a, the light source 12b, the resin case 13 and the like. The circuit board 17 is accommodated (accommodated), and is fixed to the back surface of the bottom surface portion (described later) of the back frame 15 using an appropriate fixing means.

  If necessary, one or more optical members (for example, a diffusion sheet or a prism sheet) for illuminating the display element 11 with substantially uniform backlight may be disposed between the display element 11 and the light guide 12a. Good.

  The display element 11 includes, for example, a TFT-type liquid crystal display element having a plurality of pixels, and vehicle information such as vehicle speed, engine speed, travel distance, fuel consumption, and the like based on detection signals from various sensors mounted on the vehicle. A display unit 11a for displaying (predetermined information) is provided. The display unit 11 a is displayed in a display area (not shown) of the display element 11.

  The light guide 12 a is made of a substantially flat transparent translucent resin and is disposed along the back surface of the display element 11. In other words, the light guide 12a is arranged in the illumination optical path from the light source 12b to the display element 11.

  The light source 12b is composed of a chip-type light emitting diode that emits an appropriate color, and is formed of a plurality of light emitters that are arranged in a line along the one side surface 12d of the light guide 12a and that supplies illumination light to the display element 11.

  The front frame 14 is made of a conductive material and is press-molded in a substantially frame shape. The front frame 14a is a main portion of the front frame 14 and the first peripheral wall 14b is formed to hang downward from the periphery of the front surface 14a. And are integrally formed. A display window portion 14c including a substantially rectangular opening window is formed at a substantially central portion of the front surface portion 14a so as to correspond to the display portion 11a.

  The back frame 15 is made of a conductive material like the front frame 14, and is formed in a substantially concave shape in cross section. The bottom surface 15a forms the main part of the back frame 15 and the first peripheral wall 14b side from the periphery of the bottom surface 15a. And a second peripheral wall portion 15b that protrudes toward the surface.

  Then, in FIG. 2, the first flexible wiring board 12c is fixed to the inner wall surface 15c of the second peripheral wall portion 15b located on the right side using an appropriate fixing means, and each light source 12b is connected to the light guide 12a. It is mounted on a conductive path (not shown) provided in the first flexible wiring board 12c so as to face one side surface 12d.

  In FIG. 2, reference numeral 17a denotes a first connector mounted on the circuit board 17, and the first connector 17a and the second connector 41 mounted on the wiring board 40 are the second flexible wiring board. Conductive connection is established by F.

  The protection member 20 includes a flat light-transmitting substrate 21 made of a light-transmitting resin material (for example, transparent polycarbonate) as a base material, and a black light-shielding layer printed on the back surface of the light-transmitting substrate 21. And an impermeable portion 22 made of

  The non-transmissive portion 22 is printed on the back surface of the translucent substrate 21 so as to correspond to the non-display region of the display portion 11a excluding the display region. In this case, the front surface portion 14a of the front surface portion 14 is viewed from the viewer side. Has a function as a concealing part for concealing the front surface part 14a so that it is not visually recognized. The viewer can visually recognize the vehicle information through 21 portions (transparent area) of the translucent substrate in which the non-opaque portion 22 is not formed. The non-transmissive portion 22 may be formed on the surface of the translucent substrate 21 so as to correspond to the non-display area.

  The transparent resin 30 is made of an optical adhesive (for example, a liquid silicon-based adhesive) filled in a gap S formed between the display means 10 and the protective member 20 and has a thickness of about 300 μm to 1000 μm. The refractive index is 1.45 to 1.55, which is set to a refractive index substantially equal to the refractive index of the translucent substrate 21 made of polycarbonate.

  In joining the display means 10 and the protection member 20, the transparent resin 30 is applied to at least one of the display means 10 and the protection member 20, and then the display means 10 and the protection member 20 are used using the transparent resin 30. Then, the display means 10 is bonded to the protective member 20 by curing the transparent resin 30 (UV curing).

  Then, after the transparent resin 30 is cured, the transparent resin 30 is a protective member 20 that is an adhesive portion that adheres (adheres) to the transparent resin 30 or a front polarizing member (not shown) provided on the front side of the display element 11. Adhesive strength (elastic adhesive strength) that absorbs expansion and contraction due to a difference in linear expansion coefficient and does not cause peeling at the adhesive portion (that is, the adhesive surface between the transparent resin 30 and the translucent substrate 21 or the front polarizing member). It becomes an adhesive that hardens into a gel. If necessary, a dam-like portion (not shown) made of a sealing material is embedded between the non-permeable portion 22 and the front surface portion 14a so as to surround the transparent resin 30, and the transparent resin 30 is displayed on the display means 10. You may make it not flow out around.

  The wiring board 40 is made of a hard circuit board in which a wiring pattern (not shown) is provided on a glass epoxy base material, for example. For example, the command signal for displaying the display element 11 and the light source 12b for lighting operation are used. The control means for outputting other command signals, the second connector 41, and circuit components (not shown) such as resistors and capacitors are conductively connected to the wiring pattern.

  The casing 50 is formed in a substantially box shape and constitutes an exterior case of the vehicle instrument D, and the display means 10, the protection member 20, the wiring board 40, and the like are accommodated therein.

  In this case, the casing 50 is installed (arranged) so as to close the first case body 60 made of a black resin material having a substantially inverted concave shape in cross section and the lower end side opening of the first case body 60. It is divided into a second case body 70 made of a substantially flat resin material, and the second case body 70 is fixed to the first case body 60 using an appropriate fixing means.

  The first case body 60 includes a front wall portion 61 that covers the periphery of the translucent substrate 21 (protective member 20), and a side wall portion 62 that surrounds the side of the display means 10 and the protective member 20, and the front wall portion. A substantially rectangular opening window 61 a is formed at a substantially central portion of 61 so as to correspond to the display portion 11 a of the display element 11.

  Further, the side wall portion 62 is provided with an inclined portion 62 a having an inclined wall shape at a position corresponding to the transparent resin 30 in the thickness direction Z (see FIG. 2) orthogonal to the plate surface direction of the protection member 20.

  Then, UV light (transparent) is irradiated on the surface of the inclined portion 62a in the first case body 60 (housing 50) from the opposite side to the display side of the display unit 11a toward the display unit 11a, as will be described later. A reflection portion 62b having a function of reflecting the light for curing the resin 30 toward the gap S is provided.

  The reflecting portion 62 b is configured by an inclined highly reflective surface provided on the surface of the inclined portion 62 a in the side wall portion 62. For example, the reflection part 62b may be obtained by sticking a reflective film (or a reflection sheet) of a metal such as aluminum or silver having a high light reflectance on the surface of the inclined part 62a, or may have a high light reflectance. It may be obtained by depositing a metal layer or a mirror layer on the surface of the inclined portion 62a using means such as hot stamping, or the side wall portion 62 provided with the front wall portion 61 and the inclined portion 62a. May be obtained by two-color molding of the black resin that constitutes and the white resin that constitutes the reflecting portion 62b.

  A vehicle meter D is configured by the above-described units. In such a configuration, a viewer who visually recognizes the vehicle meter D visually (sees) the vehicle information displayed in the display area of the display element 11 through the transparent resin 30 and the translucent substrate 21. Can do.

  Next, a means for curing the transparent resin 30 with UV when the display means 10 and the protective member 20 are bonded using the transparent resin 30 will be described. First, as shown in FIG. 3, a pre-UV irradiation component 90 in a state where the wiring board 40 and the second case body 70 are removed is prepared. At this time, the transparent resin present in the gap S is in an uncured state that is not cured.

  Then, a UV (ultraviolet light) lamp L1 disposed on the front side of the display means 10 (display surface side of the display section 11a) and a back surface side of the display means 10 (opposite side of the display surface side of the display section 11a). Using the UV (ultraviolet) lamp L2, the ultraviolet ray (UV light 80) is irradiated from the front side of the pre-UV irradiation component 90 and the back side of the pre-UV irradiation component 90. In the following description, of the UV light 80, the UV light irradiated from the UV lamp L1 is described as UV light 81, and the UV light irradiated from the UV lamp L2 is described as UV light 82.

  Here, the UV light 81 irradiated from the UV lamp L1 arranged on the front side of the display means 10 passes through the light-transmitting substrate 21 where the opaque portion 22 is not formed and overlaps with the opaque portion 22. By irradiating the first transparent resin portion 31 that is not the transparent resin 30 portion, the first transparent resin portion 31 is cured.

  On the other hand, a part of the UV light 82 emitted from the UV lamp L2 disposed on the back side of the display means 10 is efficiently reflected toward the transparent resin 30 side in which the gap S is filled by the reflecting portion 62b. (See FIG. 4). In other words, the reflecting portion 62b is irradiated toward the display portion 11a from the UV light 82 irradiated from the UV lamp L2 disposed on the back side of the display means 10 (that is, from the side opposite to the display side of the display portion 11a). As a highly reflective surface that actively reflects the UV light 82) from the side surface side of the display means 10 toward the gap S (that is, the second transparent resin portion 32 that is the transparent resin 30 portion overlapping the non-transmissive portion 22). It has the function of

  And, by partially irradiating the UV light 82 from the UV lamp L2 toward the second transparent resin part 32 using the reflection part 62b configured with the high reflection surface in this way, Both the first transparent resin portion 31 and the second transparent resin portion 32 are cured.

  Therefore, since the UV light 82 emitted from the UV lamp L2 can be efficiently (positively) guided to the second transparent resin portion 32 using the reflecting portion 62b, the UV light 82 is not reflected on the back surface of the translucent substrate 21. Even when the transmissive portion 22 is formed, the UV light 82 can easily reach the second transparent resin portion 32, and thereby, the portion of the transparent resin 30 that overlaps the non-transmissive portion 22 (that is, the second transparent resin portion 32). ) Can be cured in a relatively short time, and workability when the display means 10 and the protective member 20 are joined can be improved.

  As described above, in the present embodiment, the display unit 10 having the display unit 11 a for displaying the vehicle information and the protective member 20 covering the display unit 10 are formed between the display unit 10 and the protective member 20. The protective member 20 is bonded to the translucent substrate 21 so as to correspond to the non-display area of the display portion 11a and the translucent substrate 21 as a base material. The vehicle instrument D provided with the formed opaque portion 22 includes a housing 50 that houses the display means 10 and the protection member 20, and the first case body 60 (housing 50) includes a display portion. A reflecting portion 62b is formed that reflects the UV light (light for curing the transparent resin 30) 82 irradiated toward the display portion 11a from the side opposite to the display side of 11a toward the gap S. The first case body 60 (housing 50) includes a side wall portion 62 that surrounds the side of the display unit 10 and the protection member 20, and the reflection portion 62 b is an inclined high reflection provided on the side wall portion 62. It is composed of surfaces.

  Accordingly, the UV light 82 emitted from the UV lamp L2 disposed on the back side of the display means 10 is efficiently guided to the second transparent resin portion 32 by the reflecting portion 62b configured with a highly reflective surface. The portion of the transparent resin 30 (that is, the second transparent resin portion 32) that overlaps the opaque portion 22 can be cured in a relatively short time, and the workability when the display means 10 and the protective member 20 are joined is improved. It becomes possible.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS. 4 and 5. The same reference numerals are used for the same or corresponding parts as in the first embodiment, and the details thereof are used. The detailed explanation is omitted. In the second embodiment, the non-transparent portion 22 formed on the translucent substrate 21 is abolished, and a substantially frame-shaped non-transparent portion 63 that holds the peripheral edge on the back side of the translucent substrate 21 and the vicinity thereof. Is integrally formed with the first case body 60 of black resin.

  The opaque part 63 formed of a black resin material is provided so as to correspond to the non-display area of the display part 11a, and the front part 14a of the front part 14 is not visually recognized from the viewer side. It has a function as a concealing part that conceals the front surface part 14a. If necessary, the protection member 20 (translucent substrate 21) and the first case body 60 may be integrally formed by insert molding. In the case of the second embodiment, the inclined portion 62a and the reflecting portion 62b are configured to be provided on the rear side peripheral portion of the non-transmissive portion 63.

  Next, in the second embodiment, the means for UV curing the transparent resin 30 when the display means 10 and the protection member 20 are bonded using the transparent resin 30 will be described. First, as shown in FIG. 5, a pre-UV irradiation component 91 is prepared in a state in which the wiring board 40 and the second case body 70 are removed. At this time, the transparent resin present in the gap S is in an uncured state that is not cured.

  Then, using the UV lamp L1 disposed on the front side of the display unit 10 and the UV lamp L2 disposed on the back side of the display unit 10, the front side of the pre-UV irradiation component 91 and the pre-UV irradiation component 91 are arranged. Irradiate UV light from the back side.

  Here, the UV light 81 irradiated from the UV lamp L1 disposed on the front side of the display means 10 passes through the translucent substrate 21 and is a first transparent resin 30 portion that does not overlap the non-transmissive portion 63. By irradiating the resin part 31, the first transparent resin part 31 is cured.

  On the other hand, a part of the UV light 82 emitted from the UV lamp L2 disposed on the back side of the display means 10 is efficiently reflected toward the transparent resin 30 side in which the gap S is filled by the reflecting portion 62b. The In other words, the reflecting portion 62b is irradiated toward the display portion 11a from the UV light 82 irradiated from the UV lamp L2 disposed on the back side of the display means 10 (that is, from the side opposite to the display side of the display portion 11a). As a highly reflective surface that actively reflects the UV light 82) from the side surface side of the display means 10 toward the gap S (that is, the second transparent resin portion 32 that is the transparent resin 30 portion overlapping the non-transmissive portion 63). It has the function of

  And, by partially irradiating the UV light 82 from the UV lamp L2 toward the second transparent resin part 32 using the reflection part 62b configured with the high reflection surface in this way, Both the first transparent resin portion 31 and the second transparent resin portion 32 are cured. Accordingly, since the UV light 82 irradiated from the UV lamp L2 can be efficiently guided to the second transparent resin portion 32 using the reflecting portion 62b, the portion of the transparent resin 30 (that is, the first transparent resin 30 overlapping the non-transmissive portion 63). 2 transparent resin portion 32) can be cured in a relatively short time, and the same effect as the first embodiment can be obtained.

  In each of the above embodiments, the example in which the reflecting portion 62b is configured by an inclined highly reflecting surface has been described. However, the reflecting portion 62b has a shape in which the UV light 82 irradiated from the UV lamp L2 is used as the second transparent resin. Any shape can be adopted as long as it is a shape that efficiently leads to the portion 32. For example, the reflecting portion 62b may be a curved portion having a convex curved surface on the second transparent resin portion 32 side.

DESCRIPTION OF SYMBOLS 10 Display means 11 Display element 11a Display part 12 Illumination means 14 Front frame 14a Front part 14c Display window part 15 Back frame 16 Frame body 20 Protection member 21 Translucent board | substrates 22 and 63 Impervious part 30 Transparent resin 31 1st transparent resin Part 32 Second transparent resin part 40 Wiring board 50 Housing 60 First case body 61 Front wall part 62 Side wall part 62a Inclined part 62b Reflecting part 70 Second case body 80, 81, 82 UV light (for transparent resin curing) Light of)
90, 91 Parts before UV irradiation L1, L2 UV lamp S Gap

Claims (3)

A display unit having a display unit for displaying predetermined information and a protective member covering the display unit are joined by a transparent resin filled in a gap formed between the display unit and the protective member,
In the display device, the protective member includes a translucent substrate that is a base material of the protective member, and a non-transparent portion that is formed on the translucent substrate so as to correspond to a non-display area of the display unit.
A housing for accommodating the display means and the protection member;
The casing is formed with a reflection part that reflects the light for curing the transparent resin irradiated toward the display unit from the side opposite to the display side of the display unit toward the gap. A characteristic display device. In a display device in which a display unit having a display unit for displaying predetermined information and a protective member covering the display unit are joined by a transparent resin filled in a gap formed between the display unit and the protective member. ,
A housing for accommodating the display means and the protection member;
The casing is provided with an opaque portion provided so as to correspond to a non-display area of the display portion, and for curing the transparent resin that is irradiated toward the display portion from a side opposite to the display side of the display portion. And a reflecting portion that reflects the light toward the gap. The housing includes a side wall portion that surrounds the side of the display means and the protection member,
The display device according to claim 1, wherein the reflection portion is configured by an inclined high reflection surface provided on the side wall portion.

Images