JP2002055630A - Display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a display panel which has unexpectedness and attractiveness as a product, by stereoscopically projecting a frame and switches as hologram images. SOLUTION: The display panel 1 for audio equipment or on-vehicle apparatus, etc., comprises a display 2 which performs operation display; a hologram film 3 which produces virtual images 3a and 3b of the frame, key switch, etc., in arbitrary positions on the front of the display panel 1, by reflecting or diffracting the light emitted from a light source 4; a transparent touch panel 6 for outputting a control signal to the apparatus described, by detecting that the key switch position of the virtual images projected by the hologram film 3 is pressed; and an optical shutter 5, which is interposed between the hologram film 3 and the touch panel 6 and is capable of changing over a transparent state and a light-shielding state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display panel, and more particularly, to a display panel provided in an audio device as an operation display section and an operation section, and an operation of a vehicle-mounted device such as a car stereo, a car air conditioner, and a car navigation system. The present invention relates to a display panel installed on an instrument panel of an automobile as a display unit and an operation unit.

[0002]

2. Description of the Related Art Generally, a display panel 90 of this type is configured as shown in an exploded perspective view shown in FIG. 6 if it is, for example, a display panel for a vehicle-mounted device. A resin frame 92 is mounted on the display 91 so as to surround the periphery of the display portion of the display 91.

A key switch 9 for operating devices such as a car stereo and a car air conditioner is provided on a resin frame 92.
2a is formed, and a display window 92b is formed, and a display 91 is provided to the operator through the display window 92b.
Are provided.

[0004] The display panel 90 constructed as described above.
Is an operator (driver or occupant in the front passenger seat), such as an automobile instrument panel, integrated with a case etc.
An opening is formed at a central position where the device is easy to operate, and is mounted and wired together with a vehicle-mounted device such as a car stereo.

[0005]

However, in such a conventional display panel 90, the presence of the resin frame 92 and a number of key switches 92a are conspicuous even when no display is performed on the display 91, and the appearance is poor. In addition, since the display contents and functions are specified depending on the configuration, there is a problem that the display is not surprising and is less attractive as a product, and solving such a problem has been an issue.

[0006]

According to the present invention, as a specific means for solving the above-mentioned conventional problems, there are provided an operation display section and an operation section of an audio equipment, a car stereo, a vehicle-mounted equipment such as a car air conditioner and the like. In the display panel, a display for performing operation display of the audio equipment, the in-vehicle equipment, and the like, and a virtual image such as a frame or a key switch is generated at an arbitrary position on the front surface of the display panel by reflecting or diffracting light emitted from a light source. A hologram film, a transparent touch panel for detecting that a key switch position of a virtual image projected by the hologram film is pressed, and outputting a control signal to the device, between the hologram film and the touch panel A display comprising an optical shutter interposed and capable of switching between a transparent state and a light-shielded state. It solves the problem by providing a panel.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail based on an embodiment shown in the drawings.

FIGS. 1 and 2 show a display panel 1 according to the present invention.
1 is a cross-sectional view of the display panel 1, and FIG. 2 is a front view. This display panel 1 has the structure shown in FIG.
A hologram film 3 covering the whole of a display 2 such as a liquid crystal display as shown in the sectional view of FIG. 1, a light source 4 for irradiating the hologram film 3 with light, and a light source covering the hologram film 3 further. A shutter 5 and a touch panel 6 are provided.

The display 2 is composed of a liquid crystal display, an EL (electroluminescence) display, a plasma display, and the like, and is appropriately provided with a back lighting device and a drive circuit (such as an inverter), and is provided with audio equipment. It is connected to in-vehicle devices such as a car, a car stereo, and a car air conditioner, and displays operation and functions of these devices.

Further, the hologram film 3 reflects or diffracts the light emitted from the light source 4 in an arbitrary direction to generate a display virtual image at an arbitrary position. The hologram images 3a and 3b of the frame, the key switch, the display window, etc. are formed toward the operator, and these hologram images 3a and 3b are three-dimensionally raised and formed on the display screen of the display panel 1, It is visually recognized by the operator.

When the display panel 1 is viewed from the front in this state, the display of the display 2 is displayed from the display window 3b of the frame formed as a hologram image as shown in FIG. Is a key switch 3 for operating on-vehicle equipment such as audio equipment and car stereos.
a is formed in the same manner, and is observed by the operator as if it were a conventional display panel.

FIG. 3 is an explanatory view showing an example of the image formation on the hologram film 3. A first light source 4a and a second light source 4b are provided on both sides of the hologram film 3, and are separately provided. The light is irradiated from the direction toward the hologram film 3. The hologram film 3 forms the illuminated light into separate and arbitrary positions, respectively, and the first hologram image 3a1 by the first light source 4a and the second hologram image 3 by the second light source 4b.
a2 are respectively imaged. Therefore, for example, it is possible to display the car stereo display panel including the key switch for the driver's seat and to display the company logo on the passenger in the passenger seat, so that the display content can be switched by the viewer.
The hologram film 3 includes a reflection type and a transmission type. In the case of the reflection type, the light of the light source 4 or sunlight is irradiated from the display surface side to form a hologram image by the reflected light, and the hologram image is transmitted. In the case of a mold, light from the light source 4 is irradiated from the back side, and a hologram image is formed by the diffracted light.

In the present invention, an optical shutter 5 and a touch panel 6 are further provided on the hologram film 3.
Are provided so as to cover the whole.

The light shutter 5 is a light control member that can switch between a transparent state and a light-shielded state according to the application of a voltage.
For example, a liquid crystal shutter is used. When a voltage is applied to the liquid crystal shutter 5 and the liquid crystal shutter 5 is in a transparent state (ON), the hologram images 3a and 3b are displayed together with the display on the display 2 as shown in FIG.
, The display window, and the key switch are displayed in a three-dimensional manner on the display surface. When no voltage is applied to the liquid crystal shutter 5 and the liquid crystal shutter 5 is in a light-shielded state (OFF), no external light is blocked. Not only the display of the display 2 but also the hologram images 3a and 3b of the frame, key switch, etc. of the hologram film 3 as described above are shielded by the liquid crystal shutter 5, so that nothing is displayed on the entire display panel 1. . As a result, when the liquid crystal shutter 5 is OFF, it is not apparent that the display panel 1 including the key switch 3a is present even in the appearance.

The touch panel 6 is, for example, a well-known analog-type transparent touch switch panel.
It is configured as shown in FIG. That is, two transparent substrates, a first transparent substrate 6a and a second transparent substrate 6b, are provided, and a transparent conductive film 6c is formed on the surfaces of these two transparent substrates facing each other, and a spacer 6d is provided between the two substrates. When they are interposed and there is no pressure on the upper first transparent substrate 6a, they are separated so as not to contact each other.

The transparent conductive film 6c is made of ITO (Indium)
Tin Oxide) is vacuum-deposited on each transparent substrate,
A thin film is formed by an appropriate means such as sputtering, and the opposite side of each transparent conductive film 6c is formed as shown in FIG.
As shown in FIG. 7, electrodes 6e are formed, and terminals A to D are taken out from each electrode 6e.

FIG. 5B shows an equivalent circuit of FIG. 5A. The X coordinate (horizontal direction) of the contact point Q is given by the voltage of the terminal C or D when a voltage is applied between AB. The Y coordinate (vertical direction) is given by the voltage at terminal A or B when a voltage is applied between CDs, and the results are shown in C (not shown).
The coordinates of the contact point Q are detected by calculation by the PU.

When pressure F is applied by an operator's finger or the like as shown in FIG. 4 (b), the first transparent substrate 6a bends and the opposing transparent conductive films 6c contact each other via the spacer 6d. And according to the contact position, as described above,
By calculating U, the position of the pressed portion can be detected. As a result, the CPU sends a control command corresponding to the detected position to an in-vehicle device such as a car stereo or a car air conditioner.

The first transparent substrate 6a is a flexible and transparent PET so that the operator's finger touches the first transparent substrate 6a and bends under pressure.
A (polyethylene terephthalate) film or the like is used, and a transparent glass substrate or the like is used as the second transparent substrate 6b. The spacer 6d is a transparent spherical member such as a glass bead, and thus all the members constituting the touch panel 6 are formed of transparent members.

In the display panel 1 thus formed, since the touch panel 6 is entirely formed of a transparent member as described above, when the liquid crystal shutter 5 is turned on, the operator operates the touch panel 6 and the liquid crystal shutter 5 together. The hologram image 3 is transmitted through the display by the display 2 and the frame, display window, key switch, and the like by the hologram film 3.
When the liquid crystal shutter 5 is OFF, external light is blocked, and not only the display by the display 2 but also all of the hologram images 3a and 3b such as frames, display windows, and key switches. Is completely invisible to the operator.

Next, the operation of the display panel 1 will be described.

The power supply of the display panel 1 itself is turned on by touching somewhere on the surface of the touch panel 6, and a voltage is applied to the liquid crystal shutter 5 at the same time as the power supply of the display panel 1 is turned on. Display of display 2 on panel 1 and hologram image 3 of frame, display window, key switch, etc.
a, 3b are displayed.

Next, the operator presses the surface of the touch panel 6 corresponding to the position of the key switch 3a projected as a hologram image with a finger, and the CPU detects the coordinate value of the pressed portion. It recognizes which key switch 3a has been pressed from the detected coordinate values, and executes a process corresponding to the pressed key switch 3a on a vehicle-mounted device such as a car stereo.

When the power is turned off, the operator presses the power-off button in the key switch 3a projected as a hologram image and presses the corresponding surface of the touch panel 6, whereby the CPU is turned off. Upon recognizing that the power is off, the liquid crystal shutter 5 is turned off and the power of the display 2 is also turned off. As a result, the liquid crystal shutter 5 blocks all external light, so that not only the display of the display 2 but also the frame and the key switch cannot be seen on the display panel 1, so that the display panel 1 cannot be recognized even there. For this reason, if it is flush with the instrument panel, the interior of the vehicle interior will look good as a neat design, and the frame and key switch will be projected three-dimensionally as a hologram image on the display panel 1 when the power is turned on. Thus, a display panel attractive as a product due to its unexpectedness is realized. Furthermore, by switching the hologram image depending on the viewing direction of the observer, for example, if the passenger in the front passenger seat displays a corporate logo or decorative pattern etc. in a three-dimensional manner, a surprising and attractive display panel is realized. Is done.

In the above embodiment, an analog touch panel has been described as an example. However, the present invention is not limited to this, and a plurality of strip-shaped transparent electrodes are arranged in a matrix in the orthogonal direction. But it is good.

[0026]

As described above, according to the present invention, a display panel for an audio device, a vehicle-mounted device, or the like is provided with a display device for displaying an operation, and a display panel for reflecting or diffracting light emitted from a light source. Frame at any position on the front,
A hologram film for generating a virtual image such as a key switch, a transparent touch panel for detecting that a key switch position of the virtual image projected by the hologram film is pressed and outputting a control signal to the device, and the hologram film And a touch panel interposed between the touch panel and the touch panel so that the switch can be switched between a transparent state and a light-shielded state. Not only the display of the display but also the frame and the key switch become invisible on the panel, and it becomes impossible to know that there is a display panel there.For example, if you make it flush with the instrument panel of the car, the interior of the car will be clear The design looks good and the display panel has a frame or key Since pitch is sterically displayed as a hologram image, in which excellent effects such attractive display panel as a product is achieved from the unexpected.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of a display panel according to the present invention.

FIG. 2 is a front view showing the same embodiment.

FIG. 3 is an explanatory diagram showing an image forming state of the hologram film of the same embodiment.

FIG. 4 is a sectional view showing a touch panel according to the same embodiment.

FIG. 5 is a front view illustrating a configuration of a transparent conductive film of the touch panel according to the same embodiment.

FIG. 6 is an exploded perspective view showing a display panel in a conventional example.

[Explanation of symbols]

 Reference Signs List 1 display panel 2 display 3 hologram film 3a hologram image (key switch) 3a1 first hologram image 3a2 second hologram image 3b hologram image (display window) 4 Light source 4a First light source 4b Second light source 5 Optical shutter 6 Touch panel 6a First transparent substrate 6b Second transparent substrate 6c Transparent conductive film 6d Spacer 6e …electrode

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G06F 3/023 G06F 3/03 380Z 5B068 H03M 11/04 3/033 360C 5B069 G06F 3/03 330 360A 5B087 380 3/147 A 5G435 3/033 360 G09F 19/12 L G02F 1/1335 530 3/147 G06F 3/023 310L G09F 19/12 F term (reference) 2H088 EA22 HA10 2H089 HA18 HA40 QA16 UA09 2H091 FA19X FA4106 FD LA30 MA10 2K008 AA00 AA14 CC03 5B020 AA15 CC06 CC11 CC12 DD01 DD30 FF17 FF56 5B068 AA01 AA11 AA22 AA32 BB18 BC07 BD09 BD20 BE08 CC06 CD06 5B069 AA12 BA04 BA10 BB04 JA06 5B087 AA00 FB00 BB03 FB00 03 LL17

Claims (2)

[Claims] 1. A display panel having an operation display section and an operation section for an audio equipment, a car stereo, a car air-conditioner, and other in-vehicle equipment, and a display for displaying the operation of the audio equipment and the in-vehicle equipment, and a light source. A hologram film that generates a virtual image such as a frame and a key switch at an arbitrary position on the front surface of the display panel by reflecting or diffracting the irradiated light, and pressing a key switch position of the virtual image projected by the hologram film. A transparent touch panel for detecting and outputting a control signal to the device, and an optical shutter interposed between the hologram film and the touch panel and capable of switching between a transparent state and a light-shielded state. And display panel. 2. The hologram film includes two light sources on both left and right sides, one of which forms a virtual image of the key switch, and the other of which forms a virtual image of a decorative display at separate left and right positions. The display panel according to claim 1, wherein: