JP2005043242A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small-sized display device capable of suppressing generation of a ghost, concerning the display device or the like loaded on a vehicle and provided with at least two indicators, for composing display images from each indicator by transmission and reflection and displaying it by a transmission reflection member. <P>SOLUTION: This display device is equipped with the first indicators 4, 5, 9 for forming the first display images 41, 51, 91a, the second indicator 12 for forming the second display image d, the transmission reflection member 13 arranged between the first indicators 4, 5, 9 and the second indicator 12, for composing and displaying the first and second display images 41, 51, 91a, d, by transmitting the first display images 41, 51, 91a to the observer ob side and reflecting the second display image d to the observer ob side, and a front cover 14 provided on the observer ob side of the transmission reflection member 13. In the display device, the transmission reflection member 13 is provided with the first reflection surface 131 for reflecting directly the second display image d from the the second indicator 12 to the observer ob side, and the transmission reflection member 13 is also provided with the second reflection surface 132 for reflecting the second display image d from the second indicator 12 reflected by the front cover 14 to an area other than an eyeball area ee of the observer ob. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a display device that is mounted on a vehicle, for example, and includes at least two displays, and a display image from each display is combined and displayed by transmission and reflection on a transmission / reflection member.

Conventionally, this type of display device has a stereoscopic effect and a sense of depth in a display by combining a real image and a virtual image using a transmission / reflection member such as a half mirror. For example, the first display is provided behind the half mirror. The indicator of the instrument, which is the instrument, is disposed, the indicator, which is the second indicator, is disposed in front of the half mirror, and the display image of the indicator of the instrument is transmitted through the half mirror, and the indicator Each display image is synthesized and displayed by the half mirror by reflecting the display image on the half mirror (see, for example, Patent Document 1).
JP-A-3-273945 (FIG. 1)

  However, since the half mirror is exposed in the conventional display device, a front cover may be provided on the front (observer) side of the half mirror so that the half mirror is not covered with dust or the like.

  However, when this front cover is provided, in addition to the display image of the display that directly reflects on the half mirror, the display image that is reflected by the front cover, reflected again by the half mirror, and reflected twice in total. (Also called ghost or double reflection) occurred. In order to solve this problem, it is conceivable to provide the front cover at a position separated from the half mirror and the display. However, this structure increases the display device and requires a large space for the dashboard of the vehicle. There is a risk of affecting the installation and arrangement of other equipment in the vehicle. Accordingly, the present invention has been made with respect to the above-mentioned problems, and a main object thereof is to provide a display device that is small in size and can suppress the occurrence of ghosts.

  In order to achieve the above object, the present invention provides a first display that forms a first display image, a second display that forms a second display image, and the first and second displays. A transmission / reflection member disposed between and transmitting the first display image to the viewer side and reflecting the second display image to the viewer side to synthesize and display the first and second display images; In the display device including the front cover provided on the observer side of the transmission / reflection member, the second display image from the second display is directly reflected on the transmission / reflection member to the observer side. A first reflection surface is provided and a second reflection surface is provided for reflecting a second display image from the second display reflected by the front cover to a region other than the eyeball region of the observer.

  The first display for forming the first display image, the second display for forming the second display image, and the first and second displays are disposed between the first display and the first display. And transmitting the display image to the viewer side and reflecting the second display image to the viewer side to synthesize and display the first and second display images, and the observation of the transmission and reflection member In the display device including the front cover provided on the viewer side, the transmission / reflection member is provided with a first reflection surface that directly reflects the second display image from the second display to the viewer side. A removal portion is provided by removing a reflection surface portion of the transmission / reflection member that reflects the second display image from the second display reflected by the front cover to the eyeball region of the observer.

  The display device of the present invention is small and can provide a display device capable of suppressing the occurrence of ghosts.

  The display device according to the present invention includes first display units 4, 5, and 9 that form first display images 41, 51, and 91a, a second display unit 12 that forms a second display d image, and these. It arrange | positions between the 1st indicator 4,5,9 and the 2nd indicator 12, and permeate | transmits the 1st display image 41,51,91a to the observer ob side, and the 2nd display image d is an observer. A transmission / reflection member 13 that compositely displays the first and second display images 41, 51, 91a, and d by reflection on the ob side, and a front cover 14 provided on the observer ob side of the transmission / reflection member 13 are provided. In the display device provided, the transmission / reflection member 13 is provided with the first reflection surface 131 that directly reflects the second display image d from the second display 12 to the observer ob side, and is reflected by the front cover 14. The second display image d from the second display 12 is reflected in a region other than the eyeball region ee of the observer ob. It is provided with a second reflecting surface 132 to. With such a configuration, it is possible to provide a display device that is small in size and can suppress the occurrence of ghosts.

  Further, the first display devices 4, 5, and 9 that form the first display images 41, 51, and 91a, the second display device 12 that forms the second display image d, and the first display devices. 4, 5 and 9 are arranged between the second display 12 and the first display images 41, 51 and 91a are transmitted to the observer ob side and the second display image d is reflected to the observer ob side. Thus, in a display device including the transmission / reflection member 13 for combining and displaying the first and second display images 41, 51, 91a, and d, and the front cover 14 provided on the observer ob side of the transmission / reflection member 13 The first reflective surface 131 that directly reflects the second display image d from the second display 12 to the observer ob side is provided on the transmission / reflection member 13 and the second display reflected by the front cover 14 is provided. The transflective member 1 that reflects the second display image d from 12 to the eyeball region ee of the observer ob It is provided with a removal unit 134 by removing the reflective surface portion of the. With such a configuration, it is possible to provide a display device that is small in size and can suppress the occurrence of ghosts.

  1 to 3 show a first embodiment of the present invention. Hereinafter, a case where the display device of the present invention is applied to an instrument device mounted on, for example, an automobile will be described.

  The meter device M according to the present embodiment includes a plurality of meters, and in this embodiment, from the left in FIG. 1, the meter M3 including the engine tachometer M1, the speed meter M2, the cooling water temperature meter, and the fuel meter. Is arranged. In this embodiment, a speedometer M2 disposed in the center will be described as an example. As shown in FIG. 2, the speedometer M2 includes a circuit board 1, a driving device 3 that is conductively attached to the circuit board 1 and has a rotating shaft 2 extending forward, and is driven to rotate by the rotating shaft 2 to be a first display. A pointer 4 which is one of the indicators, a display board 5 which is one of the first indicators disposed on the circuit board 1 behind the pointer 4 and a light source for the pointer which illuminates the pointer 4 6, a light source 7 for illuminating the display board 5, a case body 8 arranged between the circuit board 1 and the display board 5, and conductively mounted on the circuit board 1 and arranged in front of the pointer 4. A light emitting display unit 9 that is one of the first displays, a pointer 4, a display plate 5, a turning member 10 for exposing the light emitting display unit 9, and a visor 11 provided on the upper front side of the turning member 10 A light emitting display 12 which is a second display fixed to the visor 11, In front of and member 10, composed of a light emitting display unit 9 and the transparent reflective member 13 disposed between the light-emitting display device 12, front cover 14 that is provided on the front side of the transmissive reflecting member 13. Ob is a driver (observer) who drives the automobile or the like and visually recognizes the measuring instrument M. ee is an area (eyeball area) in which the eyeball position of the observer ob determined by the physical difference such as the height difference of the observer ob or the position of the seat in the case of a vehicle.

  The circuit board 1 is made of a hard circuit board in which a wiring pattern (not shown) is applied to a glass epoxy base material, for example, and driving means for driving / controlling the pointer light source 6, the display board light source 7, and the driving device 3. (Not shown) and various circuit components (not shown) such as resistors and capacitors are conductively connected to the wiring pattern.

  The driving device 3 is composed of a movable magnet-type instrument or a stepping motor, the main part of which is mounted behind the circuit board 1 so that the rotating shaft 2 penetrates the circuit board 1 and is appropriately connected by means such as soldering. It is electrically connected to the wiring pattern (the driving means).

  The pointer 4 is made of a translucent synthetic resin, and includes an instruction portion 41 extending linearly and a cap 42 made of a light-shielding synthetic resin that covers the outer periphery of the rotation center of the indication portion 41. The center of rotation is concealed by the light emitting display unit 9 (look-back member 10), and the tip side is exposed from the light-emitting display unit 9 (look-back member 10) to point to an indicator portion to be described later of the display board 5. In addition, a light receiving unit 44 is provided at the rotation center of the instruction unit 41, and the light receiving unit 44 receives light emitted from the pointer light source 6 disposed behind the light receiving unit 44, and the light is transmitted to the instruction unit 41. A reflecting portion 43 that reflects and guides light is formed on the side, and the indicator portion 41 of the pointer 4 emits light from the pointer light source 6 to form a first display image.

  The display board 5 includes an index portion 51 that is a first display image. The indicator portion 51 has an arcuate array shape along the rotation trajectory of the pointer 4, and is composed of a scale 51 a and a number 51 b to be indicated by the indication portion 41 of the pointer 4. Further, it has a background portion 52 that forms the background of the indicator portion 51. The indicator portion 51 and the background portion 52 are formed of a printed layer formed on the front surface of a thin plate-like base material 53 made of a light-transmitting synthetic resin, and the indicator portion 51 is formed of a white light-transmitting ink. Reference numeral 52 denotes a black light-shielding ink. The print layers of the index portion 51 and the background portion 52 are formed by printing using means such as screen printing.

  The pointer light source 6 is composed of a chip-type light emitting diode that emits red light, for example, and is a light emitter that is arranged near the center of rotation of the pointer 4 and that causes the indicator 41 of the pointer 4 to emit red light through the light receiver 44.

  The display panel light source 7 is formed of, for example, a chip-type light emitting diode that emits white light. The display panel light source 7 is a light emitter that is disposed in the case body 8 and emits the indicator 51 of the display panel 5 in white.

  The case body 8 is made of, for example, white synthetic resin, and functions as a holding member that holds the display plate 5, functions as a housing that houses the pointer light source 6 and the display plate light source 7, and light from the pointer light source 6. It has a function as a reflecting member for reflecting the light to the pointer 4 and to reflect the light of the light source 7 for the display board to the indicator portion 51.

  The light-emitting display unit 9 includes a light-emitting display unit 91 that faces a later-described opening hole 103 of the turning member 10, a driving substrate 92 that drives the light-emitting display unit 91, and the back surface of the light-emitting display unit 91 and the driving substrate 92. And a holding member 93 disposed along the line.

  In the case of the present embodiment, the light-emitting display unit 91 further seals an organic light-emitting layer sandwiched between a pair of electrodes with a pair of glass substrates, and supplies the direct current between the electrodes so that the organic light-emitting layer emits light. An electroluminescent element (organic EL) panel.

  In the case of this embodiment, the light-emitting display unit 91 emits light from the organic light-emitting layer, so that the mileage of the vehicle, fuel consumption (not shown), outside temperature, time, etc., as shown in FIG. A display image 91a composed of predetermined information is displayed by light emission to form a first display image. The display image 91a is visually recognized by the observer ob through the transmission / reflection member 13 and the front cover 14. The emission color of the display image 91a is, for example, bluish green and depends on the emission color of the organic light emitting layer itself.

  The driving substrate 92 is made of, for example, a hard circuit board in which a wiring pattern (not shown) is applied to a glass epoxy base material, and is disposed between the circuit board 1 and the light emitting display section 91. It extends in a direction orthogonal to the plate surface direction (the plate surface direction of the circuit board 1). The driving substrate 92 includes a driving unit (not shown) for driving and controlling the light-emitting display unit 91, and various circuit components (not shown) such as resistors and capacitors connected to the wiring pattern. Yes.

  The holding member 93 is made of a thin plate-like metal material, is press-formed in a substantially “L” cross section, and has a function as a holding member that holds the light emitting display portion 91 and the driving substrate 92.

  Reference numeral 94 denotes a first flexible printed circuit board for electrically connecting the light emitting display unit 91 and the driving substrate 92, and one end of the first flexible printed circuit board 94 is connected to the electrode of the light emitting display unit 91. The other end is electrically connected to the wiring pattern of the driving substrate 92. Reference numeral 95 denotes a second flexible printed board for electrically connecting the circuit board 1 and the driving board 92.

  The facing member 10 is made of black synthetic resin and includes a horseshoe-shaped opening 101 through which the pointer 4 and the display board 5 are exposed. Reference numeral 102 denotes a cover which is integrally extended from the bottom side of the turn-back member 10 upward. The cover 102 has a substantially semicircular shape covering the periphery of the light emitting display unit 91. The cover 102 is provided with an opening hole 103 through which the light emitting display unit 91 faces. In this case, since the light-emitting display unit 91 is held by the holding member 93 while the cover 102 holds down the front surface of the light-emitting display unit 91, the light-emitting display unit 91 is stable between the cover 102 and the holding member 93. Is held in.

  A side wall 104 extending in the direction of the display panel 5 is provided at a portion facing the indicator portion 51 in the peripheral portion of the cover 102. The side wall 104 is provided so that the center of rotation of the pointer 4 cannot be seen from between the cover 102 and the display board 5. Further, the side wall 104 is inclined toward the light emitting display portion 91 (that is, in the present embodiment, the direction of the center of rotation of the pointer 4).

  The visor 11 is made of a black synthetic resin like the turn-back member 10, and includes a “C” -shaped opening 111 through which the light emitting display 12 is exposed, as shown in FIG. 3.

  The light emitting display 12 includes a circuit board 122 including a plurality of light sources 121 and a reflector 125 including first, second, and two reflecting surfaces 123 and 124. The reflector 125 has a “C” shape as in the case of the opening 111.

  As shown in FIG. 3, the light source 121 is composed of, for example, a chip-type light emitting diode that emits blue light, and a plurality of light sources 121 are arranged along the opening 111 of the visor 11, and the circuit board 122 is formed on, for example, a glass epoxy base material. It consists of a hard circuit board with a wiring pattern (not shown). The reflector 125 is made of a white synthetic resin and includes the first and second reflecting surfaces 123 and 124 as described above. The first reflecting surface 123 has a conical shape and reflects light from the light source 121 to the second reflecting surface 124, and the second reflecting surface 124 has a mortar shape, and the first reflecting surface 123 Is reflected by the transmission / reflection member 13. Then, the light emitted from the second reflecting surface 124 of the light emitting display 12 is formed as the second display image, and the light emitting display image d of FIG.

  Further, in this embodiment, since the second reflecting surface 124 of the light emitting display 12 has a mortar shape, the reflected light emitting display image d also becomes a three-dimensional image and gives a sense of depth, which is more novel. Appearance can be realized. Further, the light-emitting display image d is bright in blue due to strong light at the center, and becomes darker as it goes to the surroundings.

  The transmission / reflection member 13 is made of a synthetic resin such as acrylic, and a reflection film is formed on the surface thereof so that the light-emitting display image d of the light-emitting display 12 can be favorably reflected. The transmission / reflection member 13 includes a first reflection surface 131 and a second reflection surface 132. The first and second reflecting surfaces 131 and 132 are flat surfaces. The first reflecting surface 131 transmits the display portion 91, the indicator portion 51, the display image 91a of the light emitting display 91, and the like to the observer ob side, and the light emitting display image d of the light emitting display 12 to the observer ob side. By reflecting, the display image 91a of the light emitting display 91 and the light emitting display image d reflected by the light emitting display 12 are combined and displayed. In the present embodiment, as shown in FIG. 1, the light emitting display image d overlaps a part of the cover 102 and is compositely displayed around the cover 102 to indicate the instruction unit 41, the indicator unit 51, the display image 91 a, and the light emitting display image d. As shown in FIG. 3, the viewer ob visually recognizes that each display is arranged at a different position, so that a sense of depth can be given. The second reflecting surface 132 is provided below the middle of the transmissive reflecting member 13, and has an angle different from that of the first reflecting surface 131. The angle R between the first reflecting surface 131 and the second reflecting surface 132 varies depending on various conditions such as the angle of the transmissive reflecting member 13 and the inner surface shape of the front cover 14, but the angle is 180 degrees. Is less than. The display image reflected from the inner surface of the front cover 14 by the light emission display image from the light emission display device 12 is reflected outside the eyeball region ee of the observer ob (see L1 in FIG. 2). With this configuration, the observer ob does not see the ghost of the light emitting display 12.

  The front cover 14 is made of a synthetic resin such as acrylic and is provided as close as possible to the transmissive reflecting member 13 side. In this embodiment, the light transmittance is low with a dark color. Therefore, only the indication part 41 of the pointer 4 that has emitted light, the indicator part 51 of the display board 5, the display image 91 a of the light-emitting display part 91, and the light-emitting display image d of the light-emitting display 12 can be visually recognized. Moreover, since it has a curved surface so that external light is not reflected by the observer ob, reflection of the external light by the front cover 14 is suppressed and visibility is good.

  In the present embodiment, both the first and second reflecting surfaces 131 and 132 are flat. However, the present invention is not limited to the above-described embodiment. For example, both the reflecting surfaces 131 and 132 are on the side of the observer ob. You may comprise a concave curved surface. By comprising in this way, the optical effect | action can be exerted on the display image of the light emission display 12 which is a 2nd display device, and the further visual effect can be given.

  Note that if the reflective film of the transmissive reflective member 13 is not provided and the visibility is not lowered, the reflective film need not be provided, and in this case, the cost can be reduced.

  In the present embodiment, the light emitting display unit 91 is an electroluminescent element, but an example of an electroluminescent element panel having the organic light emitting layer has been described. However, the present invention is not limited to this. Any light emitting display portion can be applied, and for example, an electroluminescent element panel having an inorganic light emitting layer, a liquid crystal display element having a backlight, and a display element such as a cold cathode tube may be used.

  In the present embodiment, an example in which the display image 91a emits and displays predetermined information such as the travel distance of the vehicle, fuel consumption, outside temperature, and time has been described. However, the present invention is not limited to this. Arbitrary display images such as characters, symbols, scales, alarm marks, and the like may be displayed by light emission.

  Next, a second embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected to the same and equivalent part as 1st Example, and the detailed description is abbreviate | omitted.

  In the present embodiment, a concave portion 133 in which the reflective surface portion is recessed in the depth direction is provided in the second reflective surface 132 portion of the first embodiment, and a removal portion 134 is formed by removing the reflective surface portion. is there. With this configuration, the light emitting display image from the light emitting display 12 reflected by the inner surface of the front cover 14 is reflected to the part other than the eyeball region ee of the observer ob (see L2 in FIG. 4). With this configuration, the observer ob does not see the ghost of the light emitting display 12 as in the above embodiment.

  As another modification of the present embodiment, the removing unit 134 may be a hole penetrating the transmissive reflecting member 13. Even if comprised in this way, the effect similar to the said Example can be acquired.

  In each of the above embodiments, since the front cover 14 was a dark color with low transmittance, each display image could not be visually recognized unless it emitted light, but the present invention is limited to the above embodiments. Instead, the front cover 14 may have a high transmittance. In this case, the display board 5 and the like can visually recognize not only the indicator portion 51 but also the background portion 52, so that the background portion 52 can be colored to obtain a design effect.

The front view of 1st Example of this invention. Sectional drawing of the AA line in FIG. The front view of the 2nd indicator of the Example. Sectional drawing of 2nd Example of this invention.

Explanation of symbols

4 Pointer (first indicator)
5 Display board (first indicator)
9 Light-emitting display unit (first display)
12 Light-emitting display (second display)
13 Transmitting / reflecting member 14 Front cover 41 Indicator (first display image)
51 Index section (first display image)
91a Display image (first display image)
131 1st reflective surface 132 2nd reflective surface 134 Removal part d Light emission display image (2nd display image)
ee Eyeball area M Instrument device M2 Speedometer ob Driver (observer)

Claims (2)

A first display for forming a first display image, a second display for forming a second display image, and the first display are disposed between the first and second displays. A transmission / reflection member for combining and displaying the first and second display images by transmitting an image to the viewer side and reflecting the second display image to the viewer side; and the viewer side of the transmission / reflection member In the display device provided with the front cover provided on the first reflection surface, the transmission reflection member is provided with a first reflection surface that directly reflects the second display image from the second display to the viewer side, and the front surface is provided. A display device comprising a second reflecting surface for reflecting a second display image from the second display reflected by a cover to a region other than the eyeball region of the observer. A first display for forming a first display image, a second display for forming a second display image, and the first display are disposed between the first and second displays. A transmission / reflection member for combining and displaying the first and second display images by transmitting an image to the viewer side and reflecting the second display image to the viewer side; and the viewer side of the transmission / reflection member In the display device provided with the front cover provided on the first reflection surface, the transmission reflection member is provided with a first reflection surface that directly reflects the second display image from the second display to the viewer side, and the front surface is provided. A display device comprising: a removing unit that removes a reflection surface portion of the transmissive reflection member that reflects the second display image reflected from the second display from the second display to the eyeball region of the observer. .

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