JP2020201165A - Display device - Google Patents

Abstract

To provide a display device which can obtain an innovative presentation effect by adding a further display to a segment display method.SOLUTION: The display device includes: a display panel for positive-displaying predetermined information 313; a light guiding member arranged behind the display panel, the light guiding member illuminating the display panel; and a light source for guiding light to the light guiding member. The light guiding member has a pattern 35 corresponding to positions behind and around the information 313 displayed in the display panel. The pattern 35 is formed in an ejection unit of the light guiding member.SELECTED DRAWING: Figure 3B

Description

The present disclosure relates to a display device, and more particularly to a display device mounted on a vehicle.

Some conventional display devices are disclosed in Patent Document 1, for example. This display device includes a liquid crystal display panel, a light guide body for the liquid crystal display panel, and a light source. The liquid crystal display panel comprises a segment display type liquid crystal display element having a numerical display unit that digitally displays the vehicle speed. The light guide for the liquid crystal display panel is arranged behind the liquid crystal display panel, receives light from the light source at the light receiving portion due to the edge light structure, guides the light, and emits the light from the exit portion for the liquid crystal display panel. The liquid crystal display panel is transmitted and illuminated. The light source is composed of an LED (Light Emitting Diode) or the like, and emits light to a light receiving portion of a light guide body for a liquid crystal display panel.

JP-A-2018-0544444

However, since the shape and position of the display are fixed in the segment display method as compared with the dot matrix display method, there is a problem that the display effect is uninteresting and monotonous, and the visual effect is insufficient.

Therefore, the present disclosure has been made in view of the above problems, and an object of the present disclosure is to add a further display to the segment display method to obtain a novel effect.

The present disclosure discloses a display panel 3 that positively displays predetermined information 313, a light guide member 4 that is arranged behind the display panel 3 and illuminates the display panel 3, and a light source that introduces light into the light guide member 4. In the display device including 8, the light guide member 4 is characterized by having patterns 441 and 442 corresponding to positions behind and around the information 313 displayed on the display panel 3.

According to the present disclosure, it is possible to provide a display device that can achieve the intended purpose, add further display to the segment display method, and obtain a novel effect.

The front view which shows the display device of 1st Embodiment. A cross-sectional view taken along the line AA in FIG. The figure which shows the pattern of the light guide body of 1st Embodiment. The figure which shows the appearance of the logo display of the display device of 1st Embodiment. The figure corresponding to FIG. 3A of the second embodiment. The figure corresponding to FIG. 3B of the second embodiment. FIG. 4 is a cross-sectional view taken along the line BB in FIG. 4A.

Hereinafter, a case where the embodiment of the display device of the present disclosure is applied to an instrument device mounted on a vehicle will be described with reference to FIGS. 1 to 5.

In the following description, the "front side" means the front side in FIG. 1 and the left side (upper case 1 side) in FIG. 2 which is visible to the viewer (driver). The “back side” means the back side in FIG. 1 and the right side (circuit board 7 side) in FIG.

(First Embodiment)
As shown in FIGS. 1 and 2, the instrument device includes an upper case 1, a lower case 2, a liquid crystal display panel (display panel) 3, a light source (light source member) 4, packing 5, and a middle case. It is mainly composed of a (case member) 6, a circuit board 7, a light source 8, and a buffer member 9.

The upper case 1 is made of a light-shielding synthetic resin such as black, and is formed in a cylindrical box shape with an opening on the back side. The upper case 1 has a transparent portion 11 on the front surface side. The transparent portion 11 is made of a translucent plate-shaped synthetic resin. The transparent portion 11 has a light-shielding layer 12 on the back surface side. The light-shielding layer 12 is composed of a layer on which black ink is printed, is formed on the outer peripheral side of the transparent portion 11, and forms a rectangular opening 121 and a plurality of notification designs 122.

The lower case 2 is made of a light-shielding synthetic resin such as black, and is formed in a substantially box-shaped shape of a cylinder having an open front side. The lower case 2 is fitted with the upper case 1 to form a closed housing, and inside the housing, the liquid crystal display panel 3, the light guide body 4, the middle case 6, the circuit board 7, the light source 8, and the buffer Accommodates the member 9.

The liquid crystal display panel 3 is a TN (Twisted Nematic) type positive display having segment-shaped pixels in which a liquid crystal material is sandwiched and enclosed between two rectangular upper and lower glass substrates and polarizing plates are bonded to the front and back surfaces thereof. It consists of a segment-type liquid crystal panel of the type (a mode in which the display characters are light-shielding when lit and translucent when extinguished. The background of the displayed characters is translucent both when lit and off).

An FPC (Flexible Printed Circuits) 32 is connected to one side of the liquid crystal display panel 3. In the FPC 32, the end face opposite to the end face connected to the liquid crystal display panel 3 is connected to the connector 71 mounted behind the circuit board 7. The FPC 32 electrically connects the liquid crystal display panel 3 and the circuit board 7 (conducting connection), guides an electric signal from the circuit board 7 to the liquid crystal display panel 3, and displays information on the display unit 31 of the liquid crystal display panel 3. Let me.

The liquid crystal display panel 3 has a display unit 31 on the front side, and the display unit 31 displays predetermined various vehicle information as an image on the front side. The display unit 31 is located inside the opening 121 and is visible to the viewer. The display unit 31 has a speed display 311 that displays the running speed of the vehicle by numbers and units, a fuel display 312 that displays the remaining fuel of the vehicle by characters, marks, and scales, and characters such as "NKZ" of the vehicle. At least the logo display (information) 313 for displaying the logo is displayed.

The liquid crystal display panel 3 has a semitransparent semi-reflective film 33 attached on a polarizing plate on the side facing the light guide body 4. The transflective semi-reflective film 33 reflects sunlight that has passed through the transparent portion 11 and has entered the liquid crystal display panel 3. Further, the semi-transmissive semi-reflective film 33 transmits the illumination light from the light guide body 4.

The light guide 4 is made of a transparent synthetic resin and is arranged behind the liquid crystal display panel 3. The light guide body 4 receives the irradiation light by lighting the light source 8 and introduces the light into the light guide body 4, and the light guide unit 4 extends from the light receiving unit 41 toward the liquid crystal display panel 3. 42, a surface behind the light guide portion 42, a slanted reflecting portion 43 that reflects the light of the light source 8 toward the liquid crystal display panel 3, and a surface facing the liquid crystal display panel 3 and reflecting portion 43. It has an exit unit 44 that irradiates the liquid crystal display panel 3 with the light reflected by the above.

The emitting unit 44 has a pattern 441 as shown in FIG. 3A. The pattern 441 is a fine satin pattern grain. The pattern 441 has a position or shape corresponding to the logo display 313, and in this case, is formed so as to surround the entire circumference at a position behind the logo display 313 and a position around the logo display 313.

The packing 5 is an elastic rubber material arranged between the upper case 1 and the lower case 2 and having a round cross section and a ring shape.

The inner case 6 is made of a white synthetic resin material, is formed in a rectangular parallelepiped substantially box shape as shown in FIG. 2, and is arranged on the circuit board 7. Although not shown, the middle case 6 has a positioning pin protruding from the back side for positioning with the circuit board 7, and the circuit board 7 is provided with a hole into which the positioning pin is inserted. Then both are fitted.

The middle case 6 has a recess 61 whose front side is open in a rectangular parallelepiped shape. The recess 61 accommodates and holds the light guide body 4. The middle case 6 arranges and holds the liquid crystal display panel 3 so as to cover the front surface of the recess 61.

The circuit board 7 is located on the back side of the inner case 6, and is mounted with electronic components such as a control means 72 for driving the liquid crystal display panel 3 and the light source 8 and a drive source 73, and is a copper foil wiring for connecting the components. A hard printed circuit board on which is printed can be applied. Further, the circuit board 7 is communicably connected to an external unit mounted on a vehicle via an external connector or a cable.

Further, the circuit board 7 has a connector 71 mounted behind the circuit board 7. The FPC 32 is connected to the connector 71, whereby the circuit board 7 and the liquid crystal display panel 3 are conductively connected.

The light source 8 is composed of a top-view type LED and emits illumination light. The light source 8 emits white illumination light.

A plurality of cushioning members 9 are attached to the light-shielding layer 12 of the upper case 1, arranged between the upper case 1 and the liquid crystal display panel 3, and are elastic sponges formed in a rectangular parallelepiped.

By being formed in this way, an outline display 35 that overlaps behind the logo display 313 and shines with a brightness lower than that of the background 34 of the liquid crystal display panel 3 is formed around the logo display 313 to obtain a novel effect. be able to. In addition, a three-dimensional display can be obtained by the step between the display unit 31 and the exit unit 44.

(Second Embodiment)
A second embodiment of the display device according to the present disclosure will be described with reference to FIGS. 4A, 4B, and 5. The same parts and the same parts as those in the first embodiment described above will be described with the same reference numerals.

In the present embodiment, the pattern 442 is a shadow expressing a shadow at a position behind the logo display 313 and a position around the logo display 313 (a portion or a side surface that becomes a shadow that is not exposed to light when the object is exposed to light). ) Is formed at the position corresponding to the part. The pattern 442 is formed in a streak pattern in the direction of light. The pattern 442 is knurled with a continuous triangular cross section, as shown in FIG.

By being formed in this way, a shadow display 36 that overlaps behind the logo display 313 and shines in a streak pattern is formed in the shaded portion of the logo display 313, and a three-dimensional effect can be obtained.

The present disclosure is not limited to the above-described embodiment, and various modifications can be made within the scope of the gist of the present disclosure. For example, although the LED is used as the light source 8 which is the lighting means, other lighting means may be used.

The present disclosure relates to a display device for a vehicle, and can be applied to, for example, a display device for a vehicle mounted on a moving body including an automobile, a motorcycle, or an agricultural machine or a construction machine.

1 Upper case 2 Lower case 3 Liquid crystal display panel (display panel)
31 Display unit 311 Speed display (predetermined information)
312 Fuel display 313 Logo display (information)
33 Semi-transmissive semi-reflective film 34 Background 35 Outline display 36 Shade display 4 Light guide body (light guide member)
41 Light receiving part 42 Light guiding part 43 Reflecting part 44 Exiting part 441 Pattern 442 Pattern 5 Packing 6 Middle case (case member)
7 Circuit board 8 Light source 9 Buffer member

Claims (5)

A display panel that positively displays predetermined information and
A light guide member arranged behind the display panel and illuminating the display panel,
In a display device provided with a light source that introduces light into the light guide member.
The display device is characterized in that the light guide member has a pattern corresponding to positions behind and around the information displayed on the display panel. The display device according to claim 1, wherein the pattern is formed at an exit portion of the light guide member. The display device according to claim 1, wherein the pattern expresses the shadow of the information displayed on the display panel. The display device according to claim 1, wherein the pattern is formed in a streak shape. The display device according to claim 1, wherein the display panel has a transflective semi-reflective film.

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