JP2004085822A - Display method and display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display method and a display apparatus for displaying a prescribed pattern with clear contrast against blue base color. <P>SOLUTION: A phosphor layer 22 is provided while comprising a phosphor emitting yellow light by being excited with blue outgoing light from a light source 23 and formed corresponding to a prescribed pattern, when displaying the prescribed pattern corresponding to display contents. The pattern is displayed by the light of the blue outgoing light passing through the layer 22 and the light passing through the part except the layer 22. The display apparatus has the light source 23 and a light transmissive display part 21. The light source 23 comprises a light source 23B emitting at least blue light. The phosphor layer 22 containing phosphor emitting yellow light being excited with the blue light, is formed in a prescribed pattern corresponding to the display contents to constitute the display apparatus. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a display method and a display device for displaying a predetermined pattern corresponding to display contents.
[0002]
[Prior art]
It has been considered to display characters, symbols (icons and the like), pictures, and the like by printing paint in a predetermined pattern on a member that transmits light (for example, a transparent panel).
[0003]
For example, as shown in FIG. 7A, a paint layer 52 is formed on the back surface 51B of the transparent panel 51, and a light source (backlight) 53 is arranged on the back surface 51B side to constitute a display device. Then, the paint layer 52 is formed in a predetermined pattern corresponding to characters, symbols, and pictures, as shown in FIG. 7B in a plan view on the back surface 51B side of the transparent panel 51.
[0004]
In this configuration, the light emitted from the light source 53 is applied to the transparent panel 51 and the paint layer 52 on the back surface 51B of the transparent panel 51, and the emitted light is transmitted through the transparent panel 51 so that the front surface 51A of the transparent panel 51 A predetermined pattern can be displayed.
[0005]
Further, as another configuration of the display device that displays a specific character or picture pattern, for example, the display portion of the specific pattern is made to be light transmissive, and light in a specific wavelength range is reflected on portions other than the display portion, but other components are included. A masking process for transmitting light in a wavelength range (see Japanese Patent Application Laid-Open No. 8-129350), forming a pattern with a fluorescent pigment, and reacting to light of a specific wavelength (ultraviolet light) emitted from a light source (fluorescent pigment) (See JP-A-8-292730), light from a light source that emits light of a first wavelength is incident on a fluorescent plate, and the fluorescent plate transmits incident light (first wavelength) and excites light. (See Japanese Patent Application Laid-Open No. 9-185337) in which light of the second wavelength is emitted and the light of the first wavelength and the light of the second wavelength are displayed through a plate on which a pattern such as a character is drawn. Proposal It has been.
[0006]
[Problems to be solved by the invention]
However, as shown in FIGS. 7A and 7B, when the paint layer 52 is simply provided on the surface 51B of the transparent panel 51 on the light source (backlight) 53 side, when light emitted from the light source 53 passes, Since light is absorbed by the paint layer 52, the display becomes gray or blackish. In the portion where the paint layer 52 is not provided, the light emitted from the light source 53 passes through the transparent panel 51 as it is, and becomes the background color of the display.
[0007]
When the light emitted from the light source 53 is of a red type or the like, the black display has a clear contrast with respect to the color of the red type background and is easy to see.
On the other hand, when the light emitted from the light source 53 is blue light, in black display, the contrast is not clear with respect to the color of the blue background, and the display content is difficult to understand.
[0008]
Heretofore, no method has been considered for displaying a predetermined pattern with a clear contrast for a blue background color.
[0009]
Further, even in the above-described other configuration, it is impossible to display a predetermined pattern with a clear contrast for the color of the blue background.
This is because, in these configurations, the ground portion other than the pattern is opaque and the blue background cannot be displayed, or the pattern is not displayed in color because the pattern alone is excited by ultraviolet light to emit light. This is because the pattern has a configuration with low transparency as in FIG.
[0010]
In order to solve the above-described problem, the present invention provides a display method and a display device that enable a predetermined pattern to be displayed with a clear contrast for a blue background color. .
[0011]
[Means for Solving the Problems]
The display method of the present invention includes a phosphor that is excited by blue emission light from a light source to emit yellow light when displaying a predetermined pattern corresponding to display content, and has a predetermined pattern. A correspondingly formed phosphor layer is provided, and display is performed by using blue light emitted from light passing through the phosphor layer and blue light emitted from light other than the phosphor layer. is there.
[0012]
According to the display method of the present invention described above, the light emitted from the light source after passing through the phosphor layer emits blue light from the light source, and the phosphor is excited by the blue emitted light to emit light. Together with the yellow light, it becomes white light. Then, since the display is performed by the white light obtained by passing the blue emission light through the phosphor layer and the light that is emitted by the blue emission light passing through the portion other than the phosphor layer, that is, the blue light, the contrast is obtained. It is possible to perform display with good visibility. At this time, since the phosphor layer is formed corresponding to a predetermined pattern (corresponding to display content), the predetermined pattern is displayed white on a blue background.
[0013]
The display method according to the present invention includes a phosphor which is excited by blue light emitted from the first light source to emit yellow light when displaying a predetermined pattern corresponding to display contents, and A phosphor layer formed corresponding to the pattern of the first light source, and has a characteristic of transmitting blue emission light from the first light source, but absorbing other colors of emission light from the second light source, And an absorption layer formed corresponding to a predetermined pattern is disposed closer to the first light source and the second light source than the phosphor layer, and light emitted from the first light source or the second light source is emitted from the absorption layer. The display is performed by the light that has passed through the phosphor layer and the light whose emitted light has passed through portions other than the absorption layer and the phosphor layer.
[0014]
According to the display method of the present invention described above, the blue light emitted from the first light source is not absorbed by the absorption layer but transmitted as it is, and the phosphor layer excites the phosphor to emit yellow light. The light that has passed through the layer and the phosphor layer becomes white, which is a combination of blue light and yellow light. Light that has passed through portions other than the absorption layer and the phosphor layer remains blue. Then, display is performed using white light obtained by passing blue emission light through the absorption layer and the phosphor layer, and light emitted by blue light passing through portions other than the absorption layer and the phosphor layer, that is, blue light. It is possible to display images with good contrast and good visibility. At this time, since the absorption layer and the phosphor layer are formed corresponding to a predetermined pattern (corresponding to display contents), the predetermined pattern is displayed in white on a blue background.
On the other hand, emitted light other than blue light from the second light source is absorbed by the absorption layer, so that the amount of light passing through the absorption layer and the phosphor layer is reduced. Also, when the wavelength of the emitted light is relatively long, the phosphor is not excited, so that there is no light emission from the phosphor. The dark light obtained when the light emitted from the second light source passes through the absorption layer and the phosphor layer is the same as the light that is emitted when the blue emission light passes through portions other than the absorption layer and the phosphor layer, that is, the emitted light. Since the display is performed using the light of the color, for example, when the light emitted from the second light source is a color such as red that can obtain a contrast with black, the contrast is obtained and the display with good visibility is performed. It becomes possible. That is, it is possible to perform display with good visibility for blue and two colors of light emitted from the second light source.
[0015]
The display device of the present invention includes a light source and a light-transmitting display portion, and the light source includes at least a light source that emits blue light. A phosphor layer including a phosphor which emits light is formed in a predetermined pattern corresponding to display contents.
[0016]
In the display device of the present invention, the phosphor layer may be made of a YAG (yttrium aluminum garnet) phosphor.
Further, in the display device of the present invention, the light source includes a first light source that emits blue light and a second light source that emits light of a color other than blue, and a blue light is provided on the light source side of the phosphor layer. A configuration is possible in which an absorption layer that absorbs light of a color other than light is formed in a predetermined pattern corresponding to display content.
[0017]
According to the configuration of the display device of the present invention described above, the phosphor of the phosphor layer is excited by the blue light from the light source to emit yellow light, and the yellow light and the blue light from the light source are combined to produce white light. It is possible to obtain. Then, since the phosphor layer is formed in a predetermined pattern corresponding to the display content, this pattern is displayed in white. Therefore, it is possible to display the pattern with good visibility for the blue color of the ground portion where the phosphor layer is not formed in the light transmitting display portion.
[0018]
When the phosphor layer is made of a YAG (yttrium aluminum garnet) -based phosphor, the blue light emitted from the light source excites the YAG of the phosphor layer to emit yellow light.
The light source has a first light source that emits blue light and a second light source that emits light of a color other than blue, and absorbs light of a color other than blue light on the light source side of the phosphor layer. When the absorbing layer is formed in a predetermined pattern corresponding to the display content, light of a color other than blue from the second light source is absorbed by the absorbing layer. For this reason, in the display when the second light source is turned on, the background color is the color of the light emitted from the second light source, and the pattern is a blackish color. On the other hand, since the blue light is not absorbed by the absorption layer, the display when the first light source is turned on is that the ground color is the blue light emitted from the first light source, and the pattern is the yellow light emitted from the phosphor layer. It becomes white together with.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention is a display method for displaying a predetermined pattern corresponding to display contents, comprising a phosphor which is excited by blue light emitted from a light source to emit yellow light, and has a predetermined pattern. A display method in which a correspondingly formed phosphor layer is provided, and display is performed by using light emitted from blue light passing through the phosphor layer and light emitted from blue light passing through portions other than the phosphor layer. It is.
[0020]
The present invention relates to a display method for displaying a predetermined pattern corresponding to display contents, comprising a phosphor which is excited by blue light emitted from a first light source to emit yellow light, and A phosphor layer formed corresponding to the pattern of the first light source, and has a characteristic of transmitting blue emission light from the first light source, but absorbing other colors of emission light from the second light source, And an absorption layer formed corresponding to a predetermined pattern is disposed closer to the first light source and the second light source than the phosphor layer, and light emitted from the first light source or the second light source is emitted from the absorption layer. And a light that has passed through the phosphor layer, and a light whose emitted light has passed through portions other than the absorption layer and the phosphor layer.
[0021]
Further, according to the present invention, in the above display method, the wavelength of the transmittance of the absorbing layer is such that the emitted light from the second light source is red and the emitted light passes through the absorbing layer and the phosphor layer to be green. Choose a distribution.
[0022]
The present invention has a light source and a light-transmitting display portion, and the light source has at least a light source that emits blue light. The light source side of the display portion emits yellow light when excited by blue light. Is a display device in which a phosphor layer including a phosphor is formed in a predetermined pattern corresponding to display contents.
[0023]
Further, according to the present invention, in the above display device, the phosphor layer is made of a YAG (yttrium aluminum garnet) phosphor.
[0024]
Further, according to the present invention, in the above display device, the light source includes a first light source that emits blue light and a second light source that emits light of a color other than blue, and the light source side of the phosphor layer has blue light. An absorption layer that absorbs light of a color other than light is formed in a predetermined pattern corresponding to display contents.
[0025]
Further, according to the present invention, in the above display device, the absorbing layer is further formed of a blue paint.
[0026]
Further, the present invention is configured such that in the above display device, a blue LED is used as a first light source and an LED of another emission color is used as a second light source.
[0027]
Further, according to the present invention, in the above display device, the light source further includes a two-color LED of blue and red as a first light source and a second light source.
[0028]
FIG. 1A shows a schematic configuration diagram of a display device as an embodiment of the present invention.
As shown in FIG. 1A, a phosphor layer 22 containing a fluorescent material is provided on a back surface 21B of a transparent panel 21 made of an acrylic resin or the like, which serves as a display unit. Is collected by the light collector 24 and irradiated.
[0029]
The light source 23 includes, for example, a blue LED 23B as a first light source and a red LED 23R as a second light source.
[0030]
The phosphor layer 22 includes a fluorescent material (phosphor) that is excited by the light emitted from the blue LED 23B of the first light source, for example, a YAG (yttrium aluminum garnet) -based phosphor.
Then, as shown in FIG. 1B, as viewed from the back surface 21B side of the transparent panel 21, the phosphor layer 22 is formed of a pattern of arbitrary characters or symbols (icons, designs, etc.) corresponding to display contents (alphabet in FIG. 1B). A). Such a pattern can be formed, for example, by printing.
[0031]
In the present embodiment, the display device having such a configuration enables a predetermined pattern to be displayed as follows.
When the blue LED 23B of the first light source is turned on, the emitted light (blue light) from the blue LED 23B excites the YAG of the fluorescent material of the phosphor layer 22, and emits yellow light.
The yellow light emitted from the fluorescent material and the blue light from the blue LED 23B transmitted through the phosphor layer 22 together produce white light, which is transmitted through the transparent panel 21 and emitted toward the surface 21A. You.
On the other hand, in the portion without the phosphor layer 22, the blue light from the blue LED 23B passes through the transparent panel 21 as it is and is emitted to the surface 21A side.
[0032]
As a result, as shown in FIG. 2, on the front surface 21 </ b> A side of the transparent panel 21, a display in which the predetermined pattern 2 is formed in white with respect to the blue ground 1 is observed.
Since the contrast can be obtained between the blue ground 1 and the white pattern 2 from the difference between the brightness and the saturation, the visibility of the pattern 2 is good.
[0033]
FIG. 2 shows a case where a character (the alphabet A) is used as the pattern 2, but FIG. 3 shows a case where a symbol (icon) is used as another pattern.
The pattern 3 shown in FIG. 3 displays, for example, an icon indicating a display relating to mail.
[0034]
According to the above-described display device of the present embodiment, the transparent panel 21 includes, on the light source 23 side, YAG that emits yellow light when excited by blue light emitted from the first light source (blue LED) 23B. By providing the phosphor layer 22 formed corresponding to the predetermined pattern, the outgoing blue light (blue light) transmitted through the phosphor layer 22 becomes blue light and yellow light emitted from YAG. Are combined to form white light, which is transmitted to the surface 21A side of the transparent panel 21. On the other hand, the ground portion other than the predetermined pattern does not have the phosphor layer 22, and the blue emission light passes through the transparent panel 21 as it is to the surface 21A side.
Thereby, on the front surface 21A of the transparent panel 21, a predetermined pattern of a white pattern on a blue background with high contrast and high visibility (high visibility) can be displayed.
[0035]
When the second light source 23R is a red LED as described above, light emitted from the second light source 23R is absorbed by the YAG of the phosphor layer 22, and the pattern is displayed in dull gray, It becomes difficult to distinguish the red color of the ground.
An embodiment that improves this point will be described below.
[0036]
FIG. 4A is a schematic configuration diagram of a display device as another embodiment of the present invention.
As shown in FIG. 4A, a phosphor layer 32 containing a fluorescent material is provided on the back surface 31B of a transparent panel 31 made of an acrylic resin or the like, serving as a display unit, similarly to the display device of the above embodiment. The light from the light source 34 is collected by the light collector 35 and irradiated onto the rear surface 31B side of the transparent panel 31.
[0037]
The light source 34 includes, for example, a blue LED 34B as a first light source and a red LED 34R as a second light source.
[0038]
The phosphor layer 32 includes a fluorescent material (phosphor), for example, YAG, which emits light when excited by light emitted from the blue LED 34B of the first light source. The phosphor layer 32 is formed so as to have a pattern of arbitrary characters and symbols (icons, designs, and the like) corresponding to display contents.
[0039]
In the display device of the present embodiment, a blue paint is applied on the phosphor layer 32, that is, on the light source 34 side, to form a blue paint layer 33.
In the blue paint layer 33, blue light passes as it is, but light of other colors is absorbed and the amount of light is reduced.
[0040]
Then, as shown in FIG. 4B, as viewed from the back surface 31B side of the transparent panel 31, the blue paint layer 33 is formed of any characters or symbols (icons, designs, etc.) corresponding to the display contents like the phosphor layer 32. Is formed so as to be a pattern.
[0041]
In the present embodiment, the display device having such a configuration enables a predetermined pattern to be displayed as follows.
[0042]
When the blue LED of the first light source 34B is turned on, the blue light emitted from the first light source 34B passes through as it is without being absorbed by the blue paint layer 33, and excites YAG in the phosphor layer 32. As a result, the light becomes white light in combination with the emitted yellow light. Light that has passed through portions other than the blue paint layer 33 and the phosphor layer 32, that is, portions of the ground other than the predetermined pattern, becomes blue as it is.
As a result, a white pattern is displayed on the blue background light.
[0043]
Further, when the red LED of the second light source 34R is turned on, the red light emitted from the second light source 34R is absorbed by the blue paint layer 33, and the YAG of the phosphor layer 32 is not excited. Therefore, the amount of light reaching the transparent panel 31 is greatly reduced, and the panel becomes black. Light that has passed through a portion other than the blue paint layer 33 and the phosphor layer 32, that is, a portion of the ground other than the predetermined pattern, becomes red as it is.
As a result, a black pattern is displayed on the red background light.
[0044]
In other words, the same transparent panel 31 can display both a white pattern on a blue background and a black pattern on a red background, both of which look good.
[0045]
Since the YAG color of the phosphor layer 32 is originally yellow, it looks green when superimposed on the blue color of the blue paint.
Therefore, by adjusting the color tone and film thickness of the phosphor layer containing YAG and the blue paint layer, when the red LED 34R of the second light source is turned on, the amount of light passing through the pattern portion is increased, and It is also possible to display the part in green and make it a complementary color to the red light transmitted through the ground part.
This makes it possible to obtain better visibility for the red light from the red LED 34R of the second light source.
[0046]
Further, in order to excite the YAG of the phosphor layer, a light source (first light source) that emits blue light having a short wavelength is necessarily required, but when a light source of two colors is used, the light source of the second light source is required. The emitted light may be other than red, for example, orange or amber (amber).
Even when using a light source that emits light other than red light, the color tone and film thickness of the blue paint are adjusted so that the blue light is not hindered, and the hue is adjusted. It is possible to enhance the shadow by making the relationship of
[0047]
Further, in the present embodiment, the blue LED 34B of the first light source and the red LED 34R of the second light source may emit light simultaneously to emit purple light.
At this time, on the surface 31A of the transparent panel 31, a whitish color pattern is observed on a purple background. The pattern has sufficient visibility due to the difference in lightness and saturation between purple and whitish colors.
[0048]
According to the display device of the present embodiment described above, the transparent panel 31 includes the YAG that is excited by the blue light emitted from the first light source (blue LED) 34B and emits yellow light on the light source 34 side. A fluorescent layer 32 formed corresponding to a predetermined pattern is provided, and a blue-based paint layer 33 for absorbing light other than blue is provided on the light source 34 side of the fluorescent layer 32. The outgoing blue light (blue light) transmitted through the body layer 32 and the blue paint layer 33 passes through the blue paint layer 33 as it is, reaches the phosphor layer 32, and receives the blue light and the YAG of the phosphor layer 32. The emitted yellow light is combined with the emitted yellow light to be transmitted to the surface 31A of the transparent panel 31 as white light. On the other hand, the ground portion other than the predetermined pattern does not have the phosphor layer 32 and the blue paint layer 33, and the blue emission light passes through the transparent panel 31 as it is to the surface 31A side.
Thus, on the surface 31A of the transparent panel 31, a predetermined pattern of a white pattern on a blue background with high contrast and high visibility (high visibility) can be displayed.
[0049]
On the other hand, the red emission light from the second light source (red LED) 34R is absorbed by the blue paint layer 33 and further absorbed by the YAG of the phosphor layer 32, so that the phosphor layer 32 and the blue paint layer The portion of the predetermined pattern 33 is displayed dark (for example, blackish) on the surface 31A side of the transparent panel 31. On the other hand, the ground portion other than the predetermined pattern does not have the phosphor layer 32 and the blue paint layer 33, and the red light is transmitted through the transparent panel 31 to the surface 31A as it is.
Thereby, on the surface 31A of the transparent panel 31, a predetermined pattern such as a dark color pattern on a red background with high contrast and high visibility (high visibility) can be displayed.
Therefore, according to the present embodiment, in the same transparent panel 31, display of a predetermined pattern that is both easy to see and has high contrast (high visibility) is performed for the blue light source 34 </ b> B and the red light source 34 </ b> R. Can be.
[0050]
In the present embodiment, a blue-based paint layer coated with a blue-based paint is provided as the absorption layer, but any other configuration may be used as long as it absorbs light other than blue. For example, it is conceivable to form an absorbing layer by arranging a resin, a film, or the like having a shape corresponding to a pattern to be displayed.
[0051]
Further, in each of the above embodiments, the phosphor layers 22 and 32 are formed directly on the back surfaces 21A and 31A of the transparent panels 21 and 31, however, in the present invention, the light transmission of the transparent panels and the like is performed. Other configurations may be used as long as the phosphor layer is disposed on the light source side with respect to the display unit of the nature.
[0052]
For example, as shown in FIG. 5, an antireflection film 41 may be formed on the back surface 31A of the transparent panel 31, and the phosphor layer 32 may be formed via the antireflection film 41. The antireflection film 41 is configured to transmit light from light sources (blue LED and red LED) but reflect external light from the surface 31A side of the transparent panel 31, and may use, for example, a white paint. . This makes it possible to prevent the pattern from being seen through when there is no need for display.
Further, in the configuration of FIG. 5, a light-shielding film 42 for blocking light from a light source is formed in a portion where no display is performed on the rear surface 31B side of the transparent panel.
[0053]
If the transparent panel (display section), the phosphor layer, the blue paint layer (absorbing layer), and the light source are formed in this order, these layers do not need to be in contact with each other.
That is, a film that transmits light from a light source and has another function, such as the above-described anti-reflection film 41, may be provided between these layers, or a space may be provided.
[0054]
INDUSTRIAL APPLICABILITY The present invention can be widely applied to devices having various configurations for displaying characters, symbols, pictures, and the like.
[0055]
For example, in a product that needs to display some information on the main body, such as a tuner or a video deck for satellite broadcasting, it can be used as one of the display units.
For example, in the case of a tuner for CS satellite broadcasting, it is conceivable to display a predetermined pattern of icons for displaying during data broadcasting reception, mail reception, telephone line use, program reservation, and the like. Can be applied.
[0056]
In such a product, when a certain main body function is activated, when a blue light source (blue LED) is turned on for the corresponding icon, yellow light is excited in the YAG of the phosphor layer and combined with the blue light to form a white light. Because it is light, a white icon is displayed on the blue light. That is, the icon can be made to shine in blue light with a white shading and emerge.
[0057]
FIG. 6 shows an embodiment of the apparatus when the present invention is applied to such a product. As shown in FIG. 6, a plurality of light-transmitting circular display units 12 are provided on a front surface 11 of the device 10. Along with the circular display section 12, the ground color from the light source is displayed, and a predetermined pattern (not shown) is displayed so as to stand out against the ground color (blue and red, for example). .
[0058]
In the present invention, a light source other than the LED can be used as long as it can emit monochromatic light in the visible light region. For example, a laser or the like configured to convert a solid laser or a gas laser into frequency (wavelength conversion) and emit visible light can be used.
[0059]
When an LED is used as a light source, a chip-type LED can be used in addition to a lamp-type LED.
[0060]
Further, the light source is not limited to a configuration in which two color light sources are integrated as in the above-described embodiment, and a first light source (for example, blue) and a second light source (for example, red) are separately arranged. A configuration may be adopted.
When the two-color LED is used as the light source as in the above-described embodiment, the design becomes easier and the size of the device can be reduced as compared with the case where the light source of another configuration is used. It has the advantage that.
[0061]
Further, in the present invention, the configuration of the light transmissive display unit is not limited to the transparent panels 21 and 31 of each of the above-described embodiments, but may be, for example, glass or a screen.
[0062]
Incidentally, by further applying the present invention, it is conceivable that, for light sources of various colors, a display in which a pattern has good visibility with respect to the color of the ground can be realized.
When the light source is a color having a relatively low visibility with black, such as green and purple, by forming a phosphor layer containing a fluorescent material excited by the light emitted from the light source, the light emitted from the light source is It is considered that it is theoretically possible to enhance the visibility with the light emitted from the light source that becomes the color of the ground only by the combination with the light emission by the excitation or only the light emission by the excitation.
If a fluorescent material that satisfies the conditions actually exists, a display with high visibility can be performed even for a light source of such a color.
In the case of a relatively bright color such as yellow or orange, visibility can be obtained by forming a pattern with a paint layer as in the related art, but the same as in the embodiment shown in FIG. Also, visibility can be obtained by a combination of a phosphor layer and an absorption layer.
[0063]
The present invention is not limited to the above-described embodiment, and may take various other configurations without departing from the gist of the present invention.
[0064]
【The invention's effect】
According to the present invention described above, a predetermined pattern such as a character, a symbol, a picture, or the like is displayed in white on a blue background, so that contrast can be obtained and the display can be easily viewed.
[0065]
Further, when an absorption layer that absorbs light other than blue is provided, a predetermined pattern can be displayed in black on a ground other than blue (for example, red). Thereby, it is possible to perform easy-to-view display for a plurality of colors of blue and other colors on the same display unit.
[Brief description of the drawings]
FIG. 1A is a schematic configuration diagram of a display device according to an embodiment of the present invention.
B is a plan view of the transparent panel of FIG. 1A as viewed from the back side.
FIG. 2 is a diagram showing a display state on the front side of the transparent panel of FIG. 1A.
FIG. 3 is a diagram showing another form of the pattern.
FIG. 4A is a schematic configuration diagram of a display device according to another embodiment of the present invention.
B is a plan view of the transparent panel of FIG. 4A as viewed from the back side.
FIG. 5 is a view showing an embodiment in which an anti-reflection film and the like are further formed on the transparent panel of FIG. 4A.
FIG. 6 is a diagram showing one embodiment of an apparatus to which the present invention is applied.
FIG. 7 is a schematic configuration diagram of an A display device.
B FIG. 7B is a plan view of the transparent panel of FIG. 7A as viewed from the back side.
[Explanation of symbols]
2,3 pattern, 21,31 transparent panel, 22,32 phosphor layer, 23,34 light source, 33 blue paint layer (absorption layer), 41 antireflection film, 42 light shielding film

Claims (9)

A display method for displaying a predetermined pattern corresponding to display content,
A phosphor layer comprising a phosphor excited by blue emission light from a light source to emit yellow light, and a phosphor layer formed corresponding to the predetermined pattern is provided,
A display method, wherein the display is performed by using light in which the blue emission light passes through the phosphor layer and light in which the blue emission light passes through a portion other than the phosphor layer. A display method for displaying a predetermined pattern corresponding to display content,
A phosphor layer which is excited by blue emission light from the first light source and emits yellow light, and is provided with a phosphor layer formed corresponding to the predetermined pattern;
An absorption layer formed to transmit blue emission light from the first light source, but to absorb other colors of emission light from the second light source, and to be formed in accordance with the predetermined pattern; Is disposed closer to the first light source and the second light source than the phosphor layer, and light emitted from the first light source or the second light source passes through the absorption layer and the phosphor layer. A display method that performs the display by using the emitted light and the light in which the emitted light passes through portions other than the absorption layer and the phosphor layer. The wavelength distribution of the transmittance of the absorption layer is selected so that the light emitted from the second light source is red, and the light that has passed through the absorption layer and the phosphor layer is green. The display method according to claim 2, wherein A light source, and a light-transmitting display unit,
The light source has a light source that emits at least blue light,
On the light source side of the display unit, a phosphor layer including a phosphor excited by the blue light and emitting yellow light is formed in a predetermined pattern corresponding to display contents. Display device. The display device according to claim 4, wherein the phosphor layer is made of a YAG (yttrium aluminum garnet) phosphor. The light source has a first light source that emits the blue light, and a second light source that emits light of a color other than blue, and a color other than the blue light is provided on the light source side of the phosphor layer. 5. The display device according to claim 4, wherein the light absorbing layer is formed in a predetermined pattern corresponding to display contents. The display device according to claim 6, wherein the absorption layer is made of a blue paint. The display device according to claim 6, wherein the light source uses a blue LED as the first light source, and uses an LED of another emission color as the second light source. The display device according to claim 6, wherein the light source uses two-color blue and red LEDs as the first light source and the second light source.

Images