JP6338087B2 - Display device - Google Patents

Description

  The present invention relates to a display device configured to guide illumination light from a light source to display means via a light guide member, for example.

  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 horizontally long rectangular liquid crystal display panel (display means) that displays various vehicle information, and is horizontally long so that illumination light from a light source is disposed along the back of the liquid crystal display panel. A light receiving portion that is guided to the liquid crystal display panel via a rectangular light guide member and is formed to hang from one side wall portion that is positioned at an end in the longitudinal direction so that the light guide member receives illumination light from the light source. And a light emitting portion for emitting the illumination light introduced to the light guide member through the light receiving portion to the liquid crystal display panel side, and a rough surface portion made of embossing or the like is provided in a region facing the light emitting portion of the light guide member. It is what has been.

JP 2012-73057 A

  By the way, for example, a horizontally-long rectangular liquid crystal display panel is divided into approximately two equal parts to the left and right, and the liquid crystal display panel is located at a position close to the one side wall and a second area far from the one side wall. The first area has a first display unit that displays vehicle speed information, and the second area displays information different from the vehicle speed information (for example, remaining fuel information that displays the remaining amount of fuel). Under the condition of having the second display portion, the roughness (texture depth) of the rough surface portion provided in the region facing the light emitting portion of the light guide member is set to the first so that illumination unevenness does not occur. It is necessary to differentiate between the area and the second area.

  That is, the rough surface portion is provided so as to correspond to the first display portion, and is provided so as to correspond to the first rough surface portion whose roughness is set to a predetermined value and the second display portion, and the roughness is By including the second rough surface portion set to a value larger than the predetermined value, the amount of illumination light from the rough surface portion to the emitting portion is adjusted, and uneven illumination is suppressed.

However, the liquid crystal display panel is transmitted and illuminated by the illumination light from the rough surface portion to the emitting portion, and when the viewer visually recognizes the first and second display portions, the first and second views are viewed from the viewer side. In addition to the display portion of 2, the line-like boundary line (boundary portion) formed between the first rough surface portion and the second rough surface portion, which should not be visually recognized, is visually recognized through the liquid crystal display panel. There was a risk of degrading the quality, leaving room for further improvement.
In view of the above-described problems, an object of the present invention is to provide a display device in which display quality is not deteriorated when a display unit is illuminated using a light guide member.

The present invention guides the illumination light from the light source to the display means through the light guide member, and the light guide member receives the illumination light from the light source and the light guide member through the light reception unit. A covering member that covers the display unit in a display device that includes a light emitting unit that emits the introduced illumination light to the display unit side, and a rough surface portion is provided in a region facing the light emitting unit of the light guide member. The rough surface portion is provided so as to correspond to the first display portion of the display means, the first rough surface portion whose roughness is set to a predetermined value, and the second display portion of the display means And a second rough surface portion whose roughness is set to a value larger than the predetermined value, and the first rough surface portion is located between the light receiving portion and the second rough surface portion. And the cover member is illuminated by the light guide member and supplied to the display means. The boundary between the first rough surface portion that is to be visually recognized on the display means over using the second rough surface portion, and that the invisible portion of the viewing Call ability is provided from the viewing side Features.

  Moreover, this invention is a display board with which the said covering member has a predetermined | prescribed display design part and an opaque ground color part which forms the background of the said display design part, The said invisible part is said 1st display. The ground color portion is integrally provided so as to partition the portion and the second display portion.

In the invention, it is preferable that the covering member is a front panel that defines a visible region of the display unit, and the invisible part partitions the first display part and the second display part. It is provided in the panel.

  According to the present invention, there is provided a light emitter for illuminating the display design portion, wherein a case body having a storage space portion for accommodating at least the display means and the light guide member is located on the back side of the cover member. An illumination space provided in the case body so as to guide other illumination light from the light emitter to the display design portion, and the case body includes a part of the other illumination light. A through-hole portion that allows the storage space portion and the illumination space portion to communicate with each other is provided so as to be guided to the light guide member.

  ADVANTAGE OF THE INVENTION According to this invention, the initial objective can be achieved and a display apparatus without a possibility that display quality may fall when illuminating a display means using a light guide member can be provided.

1 is a front view of a display device according to a first embodiment of the present invention. AA sectional drawing of FIG. The expanded sectional view which expanded the principal part of the display apparatus by the embodiment. The rear view of the light guide member by the embodiment. The expanded sectional view which expanded the principal part of the display apparatus by the modification of the embodiment. The expanded sectional view which expanded the principal part of the display apparatus by the other modification of the embodiment. Sectional drawing of the display apparatus by 2nd Embodiment of this invention.

(First Embodiment) An embodiment in which the present invention is applied to a vehicle instrument mounted on a vehicle will be described below with reference to FIGS.

  1 and 2, the vehicle instrument as a display device according to the present embodiment includes a circuit board 10, a driving device 30 that is conductively attached to the circuit board 10, and the rotating shaft 20 extends forward, and the rotating shaft 20. The pointer 40 that is rotationally driven, a display board (covering member) 50 that is disposed between the pointer 40 and the circuit board 10 and has a hole 51 corresponding to the rotary shaft 20, and the pointer 40 and the display board 50 are described later. A light emitting body 60 for illuminating the display design portion to be performed, a case body 70 positioned between the circuit board 10 and the display board 50, and a space provided on the case body 70 behind the display board 50 (described later). A display unit 80 disposed in the storage space), a front panel 90 positioned on the front side of the display board 50, and a cover member 100 covering the back side of the circuit board 10.

  The circuit board 10 is composed of a hard circuit board in which a wiring pattern (not shown) is provided on a glass epoxy base material, for example, and is a drive circuit (not shown) that performs display control of display means described later provided in the display unit 80. A light source driving circuit (not shown) for performing light emission control of a light source, which will be described later, provided in the display unit 80, driving means (not shown) for driving and controlling the driving device 30, a light emitter 60, a resistor Various circuit components (not shown) such as a capacitor are conductively connected to the wiring pattern.

  The driving device 30 is composed of a movable magnet type instrument or a stepping motor, and its main part is mounted behind the circuit board 10 so that the rotating shaft 20 penetrates the circuit board 10 and is appropriately connected by means such as soldering. It is electrically connected to the wiring pattern (the driving means).

  The pointer 40 is made of a light-transmitting synthetic resin, is connected to the tip of the rotating shaft 20, and a light-shielding cover is attached to the center of rotation. The pointer 40 is a light emitting type pointer that receives light from the light emitter 60 and emits light.

  The display board 50 as a cover member has an arcuate array shape along the rotation orbit (operation range) of the pointer 40, and a display design 52 composed of scales, numbers, and the like indicated by the pointer 40, and the display design. And an impermeable ground color portion 53 that forms the background of the portion 52.

  The display design portion 52 and the ground color portion 53 are formed of a printed layer formed on the surface of a thin plate-like translucent substrate (not shown) that is a base material of the display plate 50 that covers the display means. The design portion 52 is formed of white light-transmitting ink, and the ground color portion 53 is formed of black light-shielding ink. The display design portion 52 and the ground color portion 53 may be formed on the back surface of the translucent substrate, and the print layers of the display design portion 52 and the ground color portion 53 are screen printing or the like. It is printed using means.

  Reference numeral 54 denotes an opening window portion formed at 50 positions on the display plate corresponding to the display means, and the display means is configured to face the opening window portion 54. In this example, the opening window portion 54 is provided on the display plate 50. However, for example, a portion of the display plate 50 (the translucent substrate) corresponding to the display means without providing the opening window portion 54 is a ground color portion. 53 may be formed as a blank printing portion on which printing is not formed.

  The light emitters 60 are made of, for example, chip-type light emitting diodes that emit white light, and a plurality of light emitters 60 are arranged on the circuit board 10 corresponding to the holes 51 of the display panel 50.

  The case body 70 is made of, for example, white synthetic resin and functions as a holding body that holds the display board 50 and the display unit 80, and as a reflector that reflects light (other illumination light) from the light emitting body 60 to the front side. It has the function of

  The case body 70 is positioned between the circuit board 10 and the display board 50 so as to surround the rotary shaft 20, and a cylindrical part 71 that holds the periphery of the hole 51 in the display board 50, and the cylindrical part 71. 1st reflection part 72 which extends in a slanting direction from the rear side end part of the cylindrical part 71 at a predetermined interval, and on the bottom side corresponding to the first reflection part 72 and the cylindrical part 71 An open portion 73 that is formed and serves as a die-cutting hole when the first reflecting portion 72 and the cylindrical portion 71 are formed, and a substantially dish-shaped annular shape that is close to the display plate 50 from the open portion 73 toward the outside. It has the 2nd reflection part 74 which consists of walls, the surrounding wall part 75 surrounding the outer periphery of this 2nd reflection part 74, and the holding | maintenance part 76 holding the light guide member mentioned later with which the display unit 80 is equipped. .

  In this case, the first reflecting portion 72 constitutes a reflecting surface that radially reflects light from the light emitter 60 mainly toward the outer periphery, and the second reflecting portion 74 has an outer periphery through the first reflecting portion 72. The reflection surface which reflects the light reflected in the display board 50 side is comprised. Thereby, the light from the light emitter 60 is reflected and guided to the display design part 52 side through the reflection parts 72 and 74, and the display design part 52 can be illuminated.

  The display unit 80 includes a display unit 81 disposed so as to face the opening window 54 in the display panel 50, a light source 82 mounted (arranged) on the circuit board 10 located behind the display unit 81, The light guide member 83 is disposed in the illumination path from the light source 82 to the display unit 81, and the illumination light from the light source 82 is guided to the display unit 81 through the light guide member 83. In this case, the display unit 80 is stored in the storage space S <b> 1 including a space region formed between the peripheral wall portion 75 and the holding portion 76.

  The display means 81 is composed of, for example, a substantially horizontally long liquid crystal display panel in which liquid crystal is sealed between a pair of transparent substrates, and in this case, a first display unit capable of displaying predetermined information such as vehicle speed information and travel distance information. D1 and a second display unit D2 capable of displaying other information different from the predetermined information (for example, remaining fuel information for displaying the remaining amount of fuel and cooling water temperature information for displaying the cooling water temperature of the engine). doing.

  The first display unit D1 is located on the right side (that is, the side close to the light source 82) of the display unit 81 when the display unit 81 is divided into approximately two equal parts to the left and right, and the second display unit D2 is the display unit 81. The display means 81 is located on the left side (ie, the side far from the light source 82) when the display unit 81 is divided into approximately two equal parts. Accordingly, the display unit 81 is covered with the display plate 50 so that the first and second display units D1 and D2 provided in the display unit 81 can be viewed from the viewer side who views the display device. Become.

  The light source 82 is composed of, for example, a chip-type light emitting diode that emits white light, and is mounted on the circuit board 10 so as to face a light receiving portion (described later) of the light guide member 83. The number of the light sources 82 may be provided as many as necessary in correspondence with the shape (area) of the lower end surface of the light receiving unit.

  The light guide member 83 is formed of a translucent synthetic resin material, and faces the light source 82 and a substantially horizontally long main body 84 arranged along the back of the display unit 81 as shown in FIG. As described above, the light receiving portion 85 is integrally formed with the main body portion 84 and receives illumination light from the light source 82.

  The light receiving portion 85 is configured to be bent from one side wall portion of the main body portion 84 toward the light emitting surface of the light source 82, and the illumination light introduced into the light receiving portion 85 is directly above the light receiving portion 85. Is provided on the main body portion 84 side.

  Reference numeral 87 denotes display means 81 for illuminating light introduced into the light guide member 83 through the light receiving portion 85 (more specifically, illumination light reflected and guided into the main body portion 84 through the light receiving portion 85 and the reflecting portion 86). The light emitting portion is a flat surface for emitting light to the side, and this light emitting portion 87 is provided on the front surface of the main body portion 84 provided in the light guide member 83.

  Further, a region of the main body 84 (light guide member 83) facing the emission portion 87 (that is, the back surface of the main body portion 84) is formed in an illumination path from the reflection portion 86 to the emission portion 87. When the illumination light reflected and guided in the portion 84 is emitted from the emitting portion 87, a rough surface portion 88 is provided which is formed by embossing or the like for adjusting the amount of light (outgoing light amount).

  The rough surface portion 88 is provided so as to correspond to the first display portion D1 in the display unit 81, and the first rough surface portion P1 whose roughness (texture depth) is set to a predetermined value (for example, 10 micrometers). A second rough surface portion P2 provided so as to correspond to the second display portion D2 in the display means 81 and having a roughness (texture depth) set to a value (for example, 20 micrometers) larger than the predetermined value; It has.

  FIG. 4 is a view of the light guide member 83 when viewed from the back side. When attention is paid to the positional relationship between the light receiving portion 85 and each of the rough surface portions P1 and P2, FIG. As shown, the first rough surface portion P1 is positioned between the light receiving portion 85 and the second rough surface portion P2.

  The front panel 90 has a configuration in which a see-through portion 91 formed of a colorless and transparent resin material and a concealment portion 92 formed of an impermeable black resin material are integrally formed. The pointer 40, the display board 50, and the display parts D1 and D2 can be seen through through the see-through part 91 where the concealing part 92 does not overlap.

  The cover member 100 is formed of a synthetic resin material and is fixed to the front panel 90 using an appropriate fixing means.

  A display device is configured by the above-described units. Here, when the light source 82 provided in the display unit 80 is turned on, illumination light (white light) emitted from the light source 82 is guided to the display means 81 through the light guide member 83. Specifically, the illumination light is introduced into the light receiving unit 85 positioned directly above the light source 82, and then reflected and guided to the main body 84 side by the reflecting unit 86. The illumination light reflected and guided to the main body portion 84 side is guided to the emission portion 87 by the rough surface portions P1 and P2 provided on the back surface of the main body portion 84, is emitted from the emission portion 87, and is displayed. 81 is backlit.

  At this time, the first rough surface portion P1 is located at a position close to the light receiving portion 85 (light source 82), and the first rough surface portion is located farther from the light receiving portion 85 (light source 82) than the first rough surface portion P1. Because the second rough surface portion P2 that is larger than P1 is located, the second rough surface portion P2 that tends to be hard to reach the illumination light from the light source 82 has its roughness increased to be the emission portion 87. On the other hand, in the first rough surface portion P1, which tends to reach the illumination light from the light source 82, the roughness thereof is larger than that of the second rough surface portion P2. The reflection to the light which goes to the output part 87 (1st display part D1) is made somewhat small, and is less.

  Accordingly, the illumination light emitted from the entire emission unit 87 is adjusted in its light amount, and the illumination light adjusted in this light amount is emitted from the emission unit 87 and transmitted through the display unit 81, whereby the display unit 81. (Each display unit D1, D2) can be backlit substantially uniformly over the whole.

  By the way, when the first rough surface portion P1 and the second rough surface portion P2 having different roughness (texture depth) are provided on the back surface of the main body portion 84, the display means passes through the light guide member 83 as described above. When the display means 81 is backlit using the illumination light supplied to 81, in addition to the display information displayed on each display part D1, D2, the first rough surface part that should not be visually recognized originally There is a problem in that the boundary portion P3 formed by the line-shaped boundary line formed between P1 and the second rough surface portion P2 is visually recognized through the display means 81 and the fluoroscopic portion 91, and the display quality is deteriorated. there were.

  On the other hand, in the present embodiment, the illumination light supplied to the display unit 81 through the light guide member 83 is used to be visually recognized through the display unit 81 (the display unit 81 and the see-through unit 91). The invisible portion 55 that makes the boundary portion P3 between the rough surface portion P1 and the second rough surface portion P2 invisible from the viewer side is provided on the display board 50.

  Specifically, the invisible part 55 is integrally formed with the ground color part 53 provided in the display board 50 so as to partition the first display part D1 and the second display part D2. That is, the invisible portion 55 is formed by extending the ground color portion 53 so as to partition the display portions D1 and D2, and similarly to the ground color portion 53, the surface (or the back surface) of the translucent substrate. Further, the invisible portion 55 that covers the boundary portion P3 can be obtained by printing and forming black light-shielding ink.

  By providing the invisible portion 55 so as to partition the display portions D1 and D2 in this way, the boundary portion P3 formed by the line-shaped boundary line is formed of black light-shielding ink when the light source 82 is turned on. It is covered with an impermeable invisible part 55. For this reason, it becomes a structure which does not visually recognize the boundary part P3 which consists of a linear boundary line which should not be visually recognized through the display means 81 (the display means 81 and the see-through | perspective part 91), and a display quality falls. It is possible to provide a display device that does not have a risk of causing such a problem.

  As described above, in this embodiment, the display panel (covering member) 50 that covers the display unit 81 is provided, the rough surface portion 88 is provided so as to correspond to the first display portion D1, and the roughness is the predetermined value. And a first rough surface portion P1 set to correspond to the second display portion D2, and a second rough surface portion P2 whose roughness is set to a value larger than the predetermined value. The first rough surface portion P1 is positioned between the second rough surface portion P2 and the second rough surface portion P2, and the display plate 50 is passed through the display means 81 using illumination light supplied to the display means 81 through the light guide member 83. An invisible portion 55 is provided that makes the boundary portion P3 between the first rough surface portion P1 and the second rough surface portion P2 to be visually recognized invisible from the viewer side. Moreover, the display board 50 which is a covering member has the display design part 52 and the impermeable ground color part 53 which forms the background of the said display design part 52, and the invisible part 55 is 1st display part D1. And the second display portion D2 are provided integrally with the ground color portion 53.

  Therefore, by providing the invisible part 55 so as to partition the display parts D1 and D2, the boundary part P3 formed by the line-like boundary line is covered by the impermeable invisible part 55 when the light source 82 is turned on. For this reason, the viewer is prevented from visually recognizing the boundary portion P3 including the line-like boundary line that should not be visually recognized through the display means 81 (the display means 81 and the fluoroscopic portion 91), and the display quality is deteriorated. A display device without fear can be provided.

  In the present embodiment, the example in which the invisible portion 55 is integrally formed with the ground color portion 53 has been described. However, if the invisible portion 55 can cover the boundary portion P3 when the light source 82 is turned on, Any configuration can be adopted. For example, as a modification of the present embodiment, the invisible portion 55 formed integrally with the ground color portion 53 is eliminated as shown in FIG. The invisible portion 93 provided integrally is used to cover and hide the boundary portion P3, or as another modified example of the present embodiment, an invisible portion 55 formed integrally with the ground color portion 53 as shown in FIG. Even if it is abolished and the configuration is such that the invisible portion 94 provided in the see-through portion 91 provided in the front panel 90 is used to cover the boundary portion P3, the same effect as the above-described embodiment can be obtained. Can do.

  That is, in the former case, the covering member is the front panel 90 that defines the visible area of the display means 81, the pointer 40, and the display board 50, and the invisible portion 93 includes the first display portion D1 and the second display portion D2. And the cover portion 92 (front panel 90) made of a black resin material is integrally provided so as to cover the boundary portion P3.

  In the latter case, the covering member is the front panel 90 that defines the visible area of the display means 81, the pointer 40, and the display board 50, and the invisible portion 94 includes the first display portion D1 and the second display portion D2. And a black colored portion provided on the front surface (or the back surface) of the see-through portion 91 provided in the front panel 90 so as to cover the boundary portion P3.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIG. 7. The same reference numerals are used for the same or corresponding parts as in the first embodiment, and the detailed description thereof will be made. Omitted.

  In the case of the second embodiment, as shown in FIG. 7, the case body 70 having the storage space S <b> 1 that houses the display unit 81, the light source 82, and the light guide member 83 is behind the display plate (cover member) 50. And a light emitting body 60 composed of a chip type light emitting diode that emits white light for illuminating the display design portion 52, and other illumination light from the light emitting body 60 (from the light source 82 in the second embodiment). In order to distinguish it from the emitted illumination light, it is provided with an illumination space portion S2 provided in the case body 70 so as to guide the light emitted from the light emitter 60 to other display light) to the display design portion 52. The portion 76 (case body 70) has a through-hole portion formed of an opening window that allows the storage space portion S1 and the illumination space portion S2 to communicate so that a part of the other illumination light is guided to the light guide member 83. 76a is provided.

  Here, the above-described illumination space S2 is formed as an illumination room partitioned by the first reflection part 72 and the second reflection part 74, and the other illumination light passes through the illumination room to the display design part 52. The display design portion 52 can be illuminated from behind.

  Further, in the case of the second embodiment, in FIG. 7, the above-described through-hole portion 76 a is obtained by punching the holding portion 76 portion facing the one side surface 83 a located on the left side of the light guide member 83. It has become. The storage space portion S1 communicates with the illumination space portion S2 through the through-hole portion 76a, and part of the other illumination light emitted from the light emitter 60 when the light emitter 60 is turned on passes therethrough. After passing through the hole 76a, the light guide member 83 is introduced from one side surface 83a to the second display portion D2.

  Accordingly, the light guide member 83 corresponding to the second display portion D2 is located at a position far from the light receiving portion 85 and is difficult for illumination light from the light source 82 to reach. In the light guide member 83 corresponding to the display part D2, a part of the other illumination light passing through the through hole 76a and the illumination light from the light source 82 reflected and guided by the light receiving part 85 and the reflection part 86 are provided. Therefore, it is possible to efficiently compensate for the amount of light supplied to the light emitting portion 87 corresponding to the second display portion D2, and to suppress uneven illumination of the display means 81. There is.

  In the case of the second embodiment, the storage space S1 formed by a space area formed between the peripheral wall portion 75 and the holding portion 76 includes the display unit 81, the light source 82, and the light guide member 83. The example in which the display unit 80 is accommodated has been described. For example, the display unit 81 and the light guide member 83 of the display unit 80 are accommodated in the accommodation space S1, and the light source 82 is surrounded by the peripheral wall 75 or the holding part. It may not be surrounded by 76.

50 Display board (covering member)
52 display design part 53 ground color part 55 invisible part 60 light emitter 70 case body 76 holding part 76a through-hole part 80 display unit 81 display means 82 light source 83 light guide member 84 main body part 85 light receiving part 86 reflecting part 87 emitting part 88 rough Surface portion 90 Front panel D1 First display portion D2 Second display portion P1 First rough surface portion P2 Second rough surface portion P3 Boundary portion S1 Storage space portion S2 Illumination space portion

Claims (4)

While guiding the illumination light from the light source to the display means through the light guide member,
The light guide member includes a light receiving unit that receives illumination light from the light source, and an output unit that emits illumination light introduced to the light guide member through the light receiving unit to the display means side,
In the display device in which a rough surface portion is provided in a region facing the light emitting portion of the light guide member,
A cover member covering the display means;
The rough surface portion is provided to correspond to the first display portion of the display means, and the first rough surface portion whose roughness is set to a predetermined value;
A second rough surface portion provided to correspond to the second display portion of the display means and having a roughness set to a value larger than the predetermined value,
The first rough surface portion is located between the light receiving portion and the second rough surface portion,
The covering member has a boundary between the first rough surface portion and the second rough surface portion to be visually recognized through the display means using illumination light supplied to the display means through the light guide member. part of the display device, wherein the invisible portion is provided to the viewing impossible ability from the viewing side. The covering member is a display board having a predetermined display design portion and an impermeable ground color portion that forms a background of the display design portion,
The display device according to claim 1, wherein the invisible portion is provided integrally with the ground color portion so as to partition the first display portion and the second display portion. The covering member is a front panel defining a visible region of the display means;
The display device according to claim 1, wherein the invisible portion is provided on the front panel so as to partition the first display portion and the second display portion. A case body having a storage space for accommodating at least the display means and the light guide member is located behind the cover member;
A light emitter for illuminating the display design part;
An illumination space provided in the case body so as to guide other illumination light from the light emitter to the display design part,
The case body is provided with a through-hole portion that allows the storage space portion and the illumination space portion to communicate with each other so that a part of the other illumination light is guided to the light guide member. The display device according to claim 2.

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