JP2020064198A - Display device - Google Patents

Abstract

To provide a display device capable of switching between three displays.SOLUTION: Provided is a display device including: a first light source part for outputting a first polarized light; a second light source part for outputting a second polarized light which is orthogonal to the first polarized light; and a display part provided with three marks, for displaying a mark corresponding to incident polarized light. The first light source part includes: a first light source for emitting light of a first color; a second light source for emitting light of a second color without overlapping wavelengths; and a first polarized light member for transmitting only the first polarized light. The second light source part includes: a third light source for emitting light of a first color; a fourth light source for emitting light of a second color; and a second polarized light member for transmitting only the second polarized light. The display part includes: a third polarized light member provided with a portion of the marks, for transmitting only the first polarized light using a part not provided with a mark; a fourth polarized light member provided with the remaining marks, for transmitting only the second polarized light using a part not provided with a mark; and a color filter for outputting light corresponding to a mark in accordance with incident light.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a display device.

  Technology relating to a device for switching display using a polarizing plate has been developed. Examples of the technique include the technique described in Patent Document 1 below.

Japanese Utility Model Publication No. 61-25002

  There is a polarizing member having a function of transmitting polarized light having a predetermined polarization axis and not transmitting polarized light having a polarization axis different from that of transmitted polarized light.

  Further, it is possible to realize switching between two displays by using a display device having a structure in which two marked polarizing members are overlapped, like the display switching lamp described in Patent Document 1, for example. Is.

  However, even if an existing technique using a polarizing member, such as the technique described in Patent Document 1, is used, switching of three displays cannot be realized.

  An object of the present invention is to provide a new and improved display device capable of switching between three displays using a polarizing member.

In order to achieve the above object, according to one aspect of the present invention, a first light source unit that outputs a first polarized light having a first polarization axis and a polarization axis orthogonal to the first polarized light are provided. A second light source unit that outputs a second polarized light, the first polarized light that is provided with three marks and that is output from the first light source unit, and the second polarized light that is output from the second light source unit. A first light source that emits light of a first color; and a first light source that emits light of a first color. A second light source that emits light of a second color whose wavelength does not overlap with a color, and transmits the first polarized light of the light emitted by each of the first light source and the second light source, and transmits the second polarized light. A first polarizing member that does not transmit light, and the second light source section emits light of the first color. Of the light emitted from the light source, the fourth light source emitting the light of the second color, and the light emitted from the third light source and the light emitted from the fourth light source, respectively, the second polarized light is transmitted and the first polarized light is not transmitted. A second polarizing member, and the display unit includes:
A third polarizing member that transmits the first polarized light and does not transmit the second polarized light in a portion where some of the three marks are provided and the mark is not provided, and three marks A fourth polarizing member which is provided with the remaining marks, transmits the second polarized light and does not transmit the first polarized light, and a color filter which outputs light corresponding to the mark according to incident light. There is provided a display device having:

  In such a configuration, switching of three displays is realized by switching the display by the polarization method using the polarizing member and switching the display by using the wavelength difference of light. Therefore, with such a configuration, three displays can be switched using the polarizing member.

  The light of the first color is light of one of blue and red, and the light of the second color is light of the other of blue and red. Good.

  Further, when displaying the first mark of the three marks, the first light source is turned on, and when displaying the second mark of the three marks, the second light source and the fourth light source are When the third light source is turned on and the third mark of the three marks is displayed, the third light source may be turned on.

  Further, a light attenuating member for attenuating the light output from the display unit may be further provided.

  According to the present invention, three displays can be switched by using the polarizing member.

It is explanatory drawing which shows an example of the display apparatus which concerns on embodiment of this invention. It is explanatory drawing which shows an example of a structure of the 1st light source part and the 2nd light source part with which the display apparatus which concerns on embodiment of this invention is equipped. It is explanatory drawing which shows an example of a structure of the display part with which the display apparatus which concerns on embodiment of this invention is equipped. It is explanatory drawing which shows an example of the 3rd polarizing member, the 4th polarizing member, and the color filter which comprise the display part with which the display apparatus which concerns on embodiment of this invention is equipped. FIG. 6 is an explanatory diagram for explaining an example of switching of display in the display device according to the embodiment of the present invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this specification and the drawings, components having substantially the same functional configuration are designated by the same reference numerals, and duplicate description will be omitted.

[1] Example of Display Device According to Embodiment of Present Invention First, an example of the display device according to the embodiment of the present invention will be described.

  FIG. 1 is an explanatory diagram showing an example of a display device 100 according to an embodiment of the present invention. The display device 100 uses, for example, electric power supplied from an internal power supply (not shown) such as a battery included in the display device 100 or electric power supplied from an external power supply of the display device 100 such as a commercial power supply. To drive.

  The display device 100 includes, for example, “a first light source unit including a first light source LS1, a second light source LS2, and a first polarizing member 102”, a “third light source LS3, a fourth light source LS4, and a second polarizing member 104”. A second light source section ", a display section 106, a light blocking member 108, and a light attenuating member 110. In the example shown in FIG. 1, the upward direction shown in FIG. 1, that is, the light attenuation member 110 side corresponds to the display surface side.

  Further, the display device 100 may be provided with, for example, a processor (not shown), a ROM (Read Only Memory, not shown), and a RAM (Random Access Memory, not shown).

  The processor (not shown) controls the lighting of each of the first light source LS1, the second light source LS2, the third light source LS3, and the fourth light source LS4. As will be described later, by controlling the lighting of each of the first light source LS1, the second light source LS2, the third light source LS3, and the fourth light source LS4, the light output from the display unit 106 changes, and as a result, The display on the display device 100 changes. Examples of the processor include a CPU (Central Processing Unit) and an MCU (Micro Controller Unit). It should be noted that the first light source LS1, the second light source LS2, the third light source LS3, and a part or all of the fourth light source LS4 are turned on by an external device of the display device 100 (for example, an external processor or a light source to be turned on / off). It may be controlled by a remote controller capable of switching operation).

  The ROM (not shown) stores programs used by a processor (not shown), control data such as calculation parameters, and the like. The RAM (not shown) temporarily stores, for example, a program executed by the processor. Note that one or both of the ROM and the RAM may be a part of the processor.

[1-1] First Light Source Section The first light source section includes the first light source LS1, the second light source LS2, and the first polarizing member 102, and outputs the first polarized light having the first polarization axis.

The first light source LS1 is a light source that emits light of the first color. The second light source LS2 is a light source that emits light of the second color that does not overlap the wavelength of the first color. Examples of the first-color light and the second-color light include the following examples.
The light of the first color is blue light and the light of the second color is red light.
The light of the first color is red light, and the light of the second color is blue light.
The light of the first color is blue light and the light of the second color is amber light.
The light of the first color is amber light and the light of the second color is blue light.

  Examples of the first light source LS1 and the second light source LS2 include LEDs (Light Emitting Diodes). Lighting of each of the first light source LS1 and the second light source LS2 is controlled by, for example, a processor (not shown). The first light source LS1 and the second light source LS2 are not limited to LEDs and may be any light source capable of emitting light of a corresponding color.

  In the following, “when the first light source LS1 is a blue LED and the second light source LS2 is a red LED”, that is, “the first color light is blue light and the second color light is red. In the case of the light of ", for example. Needless to say, the examples of the first light source LS1 and the second light source LS2, and the examples of the first color light and the second color light are not limited to the above examples.

  The first polarization member 102 transmits the first polarized light of the light emitted from each of the first light source LS1 and the second light source LS2, and does not transmit the second polarized light described later. The light emitted from the first light source LS1 or the light emitted from the second light source LS2 is incident on the first polarizing member 102, as will be described later. The light emitted from the first light source LS1 and the light emitted from the second light source LS2 may be simultaneously incident on the first polarization member 102.

  Examples of the first polarizing member 102 include an absorbing polarizing member such as an absorbing polarizing film. The absorptive polarizing member is a “polarizing member that transmits polarized light having a predetermined polarization axis and absorbs polarized light having another polarization axis”. An absorptive polarizing film, which is an example of an absorptive polarizing member, is manufactured, for example, by "a PVA (polyvinyl alcohol) film having an iodine compound infiltrated therein is stretched in one direction and subjected to a crosslinking treatment". When the first polarization member 102 is an absorption type polarization member, the first polarization member 102 transmits the first polarized light having the first polarization axis and absorbs the polarized light having the polarization axis different from the first polarization axis. To do.

  The first polarizing member 102 is not limited to the absorption type polarizing member. For example, the first polarizing member 102 may be a reflective polarizing member. The reflective polarizing member is a “polarizing member that transmits polarized light having a predetermined polarization axis and reflects polarized light having another polarization axis”. A reflective polarizing film, which is an example of the reflective polarizing member, is manufactured by, for example, "evaporating a metal such as Al, Ag, or Cr on a film having a grid structure". The film is formed of, for example, TAC (Triacetylcellulose) or COP (Cyclo-Olefin Polymer).

[1-2] Second Light Source Unit The second light source unit includes the third light source LS3, the fourth light source LS4, and the second polarizing member 104, and the second polarized light having the polarization axis orthogonal to the first polarized light. Is output.

  Here, the first polarization axis and the second polarization axis according to the embodiment of the present invention are orthogonal to each other when the angle formed by the two polarization axes is 90 [°] and when the two polarization axes are formed. Including the case where the angle is 90 + E [°] (E is, for example, “a real number corresponding to an allowable error which is set in the design stage or the like”). That is, the orthogonality between the first polarization axis and the second polarization axis includes strict orthogonality and substantially orthogonality. In the following, when the first polarization axis is 0 [°] (reference angle; hereinafter the same), and the second polarization axis is 90 [°], that is, the first polarization axis. An example is given in which the and the second polarization axis are exactly orthogonal to each other. When the first polarization axis and the second polarization axis are exactly orthogonal to each other, the second polarization axis may be 0 [°] and the first polarization axis may be 90 [°].

  The third light source LS3 is a light source that emits light of the first color, similarly to the first light source LS1. The fourth light source LS4 is a light source that emits light of the second color, similarly to the second light source LS2.

  Examples of the third light source LS3 and the fourth light source LS4 include LEDs. Lighting of each of the third light source LS3 and the fourth light source LS4 is controlled by, for example, a processor (not shown). The third light source LS3 and the fourth light source LS4 are not limited to LEDs and may be any light source capable of emitting light of a corresponding color. In the following, “when the third light source LS3 is a blue LED and the fourth light source LS4 is a red LED”, that is, “the light of the first color is blue light and the light of the second color is red”. In the case of the light of ", for example.

  The second polarization member 104 transmits the second polarized light and does not transmit the first polarized light of the light emitted from each of the third light source LS3 and the fourth light source LS4. The light emitted from the third light source LS3 or the light emitted from the fourth light source LS4 is incident on the second polarization member 104, as will be described later. The light emitted by the third light source LS3 and the light emitted by the fourth light source LS4 may be simultaneously incident on the second polarizing member 104.

  As the second polarizing member 104, for example, an absorption type polarizing member or a reflection type polarizing member can be used as in the case of the first polarizing member 102. The second polarizing member 104 and the first polarizing member 102 may be the same type of polarizing member or different types of polarizing members.

FIG. 2 is an explanatory diagram illustrating an example of the configurations of the first light source unit and the second light source unit included in the display device 100 according to the embodiment of the present invention. FIG. 2 illustrates an example in which the first light source unit and the second light source unit included in the display device 100 have the following configurations. Needless to say, the configuration example of the first light source unit and the second light source unit included in the display device 100 is not limited to the example shown in FIG. 2.
The first light source LS1 and the third light source LS3 are light sources that emit blue light.
The second light source LS2 and the fourth light source LS4 are light sources that emit red light.
The first polarizing member 102 transmits polarized light having a polarization axis of 0 [°] (an example of a first polarizing axis), and the second polarizing member 104 has a polarizing axis of 90 [°] (an example of a second polarizing axis). Transmits polarized light.

[1-3] Display unit 106
One or both of the first polarized light output from the first light source unit and the second polarized light output from the second light source unit are incident on the display unit 106. Further, the display unit 106 is provided with three marks, and the display unit 106 displays a mark corresponding to incident polarized light.

  FIG. 3 is an explanatory diagram showing an example of the configuration of the display unit 106 included in the display device 100 according to the embodiment of the present invention. The display unit 106 includes a third polarizing member 112, a fourth polarizing member 114, a color filter and 116.

  One or both of the first polarized light output from the first light source unit and the second polarized light output from the second light source unit are incident on the third polarizing member 112. A part of the three marks is provided on the third polarizing member 112. An example of the mark provided on the third polarizing member 112 will be described later.

  The polarization characteristic is removed at the marked portion of the third polarizing member 112. Therefore, in the marked portion of the third polarizing member 112, the incident polarized light is transmitted regardless of the polarization axis of the incident polarized light. In addition, in the unmarked portion of the third polarizing member 112, the third polarizing member 112 transmits the first polarized light and does not transmit the second polarized light.

  Examples of the third polarization member 112 include an absorption polarization member or a reflection polarization member, as in the case of the first polarization member 102 and the second polarization member 104. The third polarizing member 112 and the first polarizing member 102 and the second polarizing member 104 may be the same type of polarizing member or different types of polarizing members.

  As described above, it suffices that the polarization characteristic is removed in the marked portion of the third polarizing member 112, and the processing method for making the mark is not particularly limited. As an example, when the third polarizing member 112 is an absorptive polarizing member, the third polarizing member 112 is provided with a mark having an arbitrary shape by, for example, punching or laser processing. The portion of the third polarizing member 112 that has been punched, that is, the portion where the mark is formed, transmits light regardless of the polarization direction. The processing method for marking the third polarizing member 112 is not particularly limited, but it is desirable to use a processing method capable of suppressing burrs during cutting.

  As another example, when the third polarizing member 112 is a reflective polarizing member, the third polarizing member 112 may have, for example, "removing the entire grid structure by punching or laser processing", or A mark having an arbitrary shape is provided by "removing the metal-deposited portion by punching or laser processing". Even when the third polarizing member 112 is a reflective polarizing member, light is transmitted through the marked portion of the third polarizing member 112 regardless of the polarization direction.

  The light transmitted through the third polarizing member 112 is incident on the fourth polarizing member 114. Of the three marks, the remaining marks not applied on the third polarization member 112 are applied to the fourth polarization member 114. An example of the mark provided on the fourth polarizing member 114 will be described later.

  The polarization characteristic is removed in the marked portion of the fourth polarizing member 114. Therefore, in the marked portion of the fourth polarizing member 114, the incident polarized light is transmitted regardless of the polarization axis of the incident polarized light. Further, in the unmarked portion of the fourth polarizing member 114, the fourth polarizing member 114 transmits the second polarized light and does not transmit the first polarized light.

  As the fourth polarizing member 114, for example, an absorption type polarizing member or a reflection type polarizing member may be used as in the case of the first polarizing member 102, the second polarizing member 104, and the third polarizing member 112. The fourth polarizing member 114 and the first polarizing member 102, the second polarizing member 104, and the third polarizing member 112 may be the same type of polarizing member or different types of polarizing members. May be.

  As described above, it suffices that the polarization characteristic is removed in the marked portion of the fourth polarizing member 114, and the processing method for marking is not particularly limited. As an example, when the fourth polarizing member 114 is an absorptive polarizing member, the fourth polarizing member 114 has a mark of an arbitrary shape by the same processing method as the third polarizing member 112 which is an absorptive polarizing member. Is applied. As another example, when the fourth polarizing member 114 is a reflective polarizing member, the fourth polarizing member 114 has an arbitrary shape by the same processing method as the third polarizing member 112 which is a reflective polarizing member. Is marked.

  The light transmitted through the fourth polarizing member 114 is incident on the color filter 116, and the color filter 116 outputs light corresponding to the mark corresponding to the incident light. As the color filter 116, for example, “a color film corresponding to the first color and a color corresponding to the second color, which are arranged so as to be able to display each of the three marks provided on the display unit 106. A film ”is mentioned. An example of the color filter 116 will be described later.

  FIG. 4 is an explanatory diagram illustrating an example of the third polarizing member 112, the fourth polarizing member 114, and the color filter 116 that configure the display unit 106 included in the display device 100 according to the embodiment of the present invention. 4A shows an example of the color filter 116, FIG. 4B shows an example of the fourth polarizing member 114, and FIG. 4C shows an example of the third polarizing member 112. FIG. 4 shows an example in which the three marks are “◯”, “Δ”, and “x”.

  As shown in FIG. 4C, the mark “x” is applied to the third polarizing member 112. As described above, the light is transmitted through the marked portion of the third polarizing member 112 regardless of the polarization direction. Moreover, only the first polarized light is transmitted through the other portion of the third polarizing member 112 where no mark is formed.

  As shown in FIG. 4B, marks “◯” and “Δ” are provided on the fourth polarizing member 114. When the three marks are “◯”, “Δ”, and “x”, the fourth polarizing member 114 is not marked in the portion where “Δ” and “x” overlap. As described above, the light is transmitted through the marked portion of the fourth polarizing member 114 regardless of the polarization direction. In addition, in the other part of the fourth polarizing member 114 which is not marked, only the second polarized light is transmitted.

  As shown in A of FIG. 4, the color filter 116 includes a portion corresponding to “a color film corresponding to a blue color (an example of the first color)” and a color corresponding to a red color (an example of the second color). It is composed of "a part composed of a film" and "a part where a color film is not provided".

  By the display unit 106 having the configuration shown in FIG. 4, for example, the display device 100 can switch the display of the three marks “◯”, “Δ”, and “x” as described later. Needless to say, the mark provided on the display unit 106 is not limited to the example shown in FIG. 4, and the display unit 106 has a configuration corresponding to the mark provided.

[1-4] Light-shielding member 108, light-attenuating member 110
The light blocking member 108 plays a role of blocking the external light from entering the display unit 106, for example. Examples of the light blocking member 108 include a light blocking resin. Note that when the display device 100 is configured such that external light does not enter the display unit 106 due to the housing of the display device 100 or the like, the display device 100 may not include the light blocking member 108.

  The light attenuating member 110 attenuates the light output from the display unit 106. By attenuating the light with the light attenuating member 110, it is possible to further reduce the possibility that, for example, uneven brightness is visually recognized. Examples of the light attenuating member 110 include a smoke material formed of a visible light cut filter of gray or black.

  The display device 100 having the configuration shown in FIG. 1, for example, can switch the display of three marks provided as described later. The configuration of the display device according to the embodiment of the present invention is not limited to the example shown in FIG. For example, the display device according to the embodiment of the present invention may not include the light attenuating member 110. Even when the light attenuating member 110 is not provided, the display device according to the embodiment of the present invention can switch the display of the three marks as described later.

[2] Example of Switching Display According to Embodiment of Present Invention Next, a display including the first light source unit shown in FIG. 2, the second light source unit shown in FIG. 2, and the display unit 106 having the configuration shown in FIG. An example of the display switching according to the embodiment of the present invention will be described using the device 100 as an example. That is, in the following, an example will be described in which the three marks “◯”, “Δ”, and “x” are provided on the display unit 106 of the display device 100, and the display of the three marks is switched. In addition, in the example shown below, the light of the first color is blue light and the light of the second color is red light.

(1) When displaying the mark "○" (an example of displaying the first mark of the three marks)
When displaying the mark “◯”, in the display device 100, the first light source LS1 that emits blue light is turned on. That is, when the mark “◯” is displayed, the light source that emits blue light is turned on in the first light source unit.

  The blue light emitted from the first light source LS1 is incident on the first polarizing member 102. The first polarizing member 102 on which blue light is incident transmits the blue first polarized light and does not transmit the polarized light having another polarization axis.

  The blue first polarized light transmitted through the first polarizing member 102 is incident on the third polarizing member 112 shown in C of FIG. Here, the unmarked portion of the third polarizing member 112 is a polarizing member that transmits only the first polarized light, and the marked portion of the third polarizing member 112 varies depending on the polarization direction. Without passing light. Therefore, the blue first polarized light incident on the third polarizing member 112 is transmitted through the entire third polarizing member 112.

  The blue first polarized light transmitted through the third polarizing member 112 is incident on the fourth polarizing member 114 shown in B of FIG. Here, the unmarked portion of the fourth polarizing member 114 is a polarizing member that transmits only the second polarized light, and the marked portion of the fourth polarizing member 114 varies depending on the polarization direction. Without passing light. Therefore, the blue first polarized light that has entered the fourth polarizing member 114 is transmitted through the marked portion of the fourth polarizing member 114.

  The blue first polarized light transmitted through the fourth polarizing member 114 is incident on the color filter 116 shown in A of FIG. The blue first polarized light incident on the color filter 116 passes through a portion formed of the blue color film and a portion where the color film is not provided, and does not pass through a portion formed of the red color film.

  Therefore, the light corresponding to the mark “◯” is output from the color filter 116, and a person who looks at the display surface (upward direction shown in FIG. 1) of the display device 100 can recognize the mark “◯”. That is, the mark “◯” is displayed on the display surface of the display device 100.

(2) When displaying the mark “△” (an example of displaying the second mark of the three marks)
When displaying the mark “Δ”, in the display device 100, the second light source LS2 and the fourth light source LS4 that emit red light are turned on. That is, when the mark “Δ” is displayed, the light source that emits red light is turned on in both the first light source unit and the second light source unit. The second light source LS2 and the fourth light source LS4 are turned on at the same time, for example. The second light source LS2 and the fourth light source LS4 may be turned on alternately.

  The red light emitted by the second light source LS2 is incident on the first polarizing member 102. The first polarization member 102 on which red light is incident transmits the first polarized light of red and does not transmit the polarized light having another polarization axis.

  The red light emitted by the fourth light source LS4 is incident on the second polarizing member 104. The second polarizing member 104 on which the red light is incident transmits the second polarized light of red and does not transmit the polarized light having another polarization axis.

  The red first polarized light transmitted through the first polarizing member 102 and the red second polarized light transmitted through the second polarizing member 104 are incident on the third polarizing member 112 shown in C of FIG. Here, the unmarked portion of the third polarizing member 112 is a polarizing member that transmits only the first polarized light, and the marked portion of the third polarizing member 112 varies depending on the polarization direction. Without passing light. Therefore, the red first polarized light incident on the third polarizing member 112 is transmitted by the entire third polarizing member 112. Further, the red second polarized light that has entered the third polarizing member 112 is transmitted only through the marked portion of the third polarizing member 112.

  The red first polarized light and the red second polarized light that have passed through the third polarizing member 112 are incident on the fourth polarizing member 114 shown in FIG. 4B. Here, the unmarked portion of the fourth polarizing member 114 is a polarizing member that transmits only the second polarized light, and the marked portion of the fourth polarizing member 114 varies depending on the polarization direction. Without passing light. Therefore, the red first polarized light that has entered the fourth polarizing member 114 is transmitted through the marked portion of the fourth polarizing member 114. Further, all the red second polarized light incident on the fourth polarizing member 114 passes through the fourth polarizing member 114.

  The red first polarized light and the red second polarized light transmitted through the fourth polarizing member 114 are incident on the color filter 116 shown in A of FIG. The red first polarized light incident on the color filter 116 passes through a portion formed of the red color film and a portion where the color film is not provided, and does not pass through a portion formed of the blue color film. Similarly, the red second polarized light incident on the color filter 116 is transmitted through a portion including the red color film and a portion where the color film is not provided, and a portion including the blue color film is transmitted. do not do.

  FIG. 5 is an explanatory diagram for explaining an example of display switching in the display device 100 according to the embodiment of the present invention, and conceptually illustrates light output from the color filter 116 when displaying the mark “Δ”. Is shown in. A of FIG. 5 shows the red first polarized light output from the color filter 116, and B of FIG. 5 shows the red second polarized light output from the color filter 116.

  When the red first polarized light shown in A of FIG. 5 and the red second polarized light shown in B of FIG. 5 are superposed, light corresponding to the mark “Δ” is obtained. Therefore, the light corresponding to the mark “Δ” is output from the color filter 116, and a person who looks at the display surface (upward direction shown in FIG. 1) of the display device 100 can recognize the mark “Δ”. That is, the mark “Δ” is displayed on the display surface of the display device 100.

(3) When displaying the mark “x” (an example of displaying the third mark of the three marks)
When displaying the mark “x”, in the display device 100, the third light source LS3 that emits blue light is turned on. That is, when the mark “x” is displayed, the light source that emits blue light is turned on in the second light source unit.

  The blue light emitted from the third light source LS3 enters the second polarizing member 104. The second polarizing member 104 on which blue light is incident transmits the second polarized light of blue and does not transmit the polarized light having another polarization axis.

  The blue second polarized light transmitted through the second polarizing member 104 is incident on the third polarizing member 112 shown in C of FIG. Here, the unmarked portion of the third polarizing member 112 is a polarizing member that transmits only the first polarized light, and the marked portion of the third polarizing member 112 varies depending on the polarization direction. Without passing light. Therefore, the blue second polarized light incident on the third polarizing member 112 is transmitted through the marked portion of the third polarizing member 112.

  The blue second polarized light transmitted through the third polarizing member 112 is incident on the fourth polarizing member 114 shown in B of FIG. Here, the unmarked portion of the fourth polarizing member 114 is a polarizing member that transmits only the second polarized light, and the marked portion of the fourth polarizing member 114 varies depending on the polarization direction. Without passing light. Therefore, all the blue second polarized light that has entered the fourth polarizing member 114 passes through the fourth polarizing member 114.

  The blue second polarized light transmitted through the fourth polarizing member 114 is incident on the color filter 116 shown in A of FIG. The blue second polarized light that has entered the color filter 116 passes through the portion formed of the blue color film and the portion where the color film is not provided, and does not pass through the portion formed of the red color film.

  Therefore, the light corresponding to the mark “x” is output from the color filter 116, and a person who looks at the display surface (upward direction shown in FIG. 1) of the display device 100 can recognize the mark “x”. That is, the mark “x” is displayed on the display surface of the display device 100.

  The display device 100 can switch and display the three marks “◯”, “Δ”, and “x” as shown in (1), (2), and (3) above. Needless to say, the example of switching the display in the display device according to the embodiment of the present invention is not limited to the above example.

[3] Example of Effect Produced by Using Display Device According to Embodiment of Present Invention Use of the display device according to the embodiment of the present invention provides, for example, the following effect. Needless to say, the effects obtained by using the display device according to the embodiment of the present invention are not limited to the effects shown below.
By switching the display according to the polarization method using the polarizing member and the display switching using the wavelength difference of light, it is possible to realize the switching of three displays that could not be realized by the existing technology.

[4] Another Application Example of the Display Device According to the Embodiment of the Present Invention The display device has been described above as an application example of the display device according to the embodiment of the present invention. Any device may be used as long as it can be assumed.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but it goes without saying that the present invention is not limited to such examples. It is obvious to those skilled in the art that various changes or modifications can be conceived within the scope described in the claims, and naturally, these also belong to the technical scope of the present invention. Understood.

For example, the configuration of the display unit 106 is not limited to the configuration shown in FIG. The display unit 106 may have a configuration in which a color filter and a polarizing member are arranged in the following order from the light source side (the first polarizing member 102 and the second polarizing member side).
-Color filter 116, third polarizing member 112, and fourth polarizing member 114
-Color filter 116, fourth polarizing member 114, and third polarizing member 112

  Further, lighting of some or all of the first light source LS1, the second light source LS2, the third light source LS3, and the fourth light source LS4 is controlled by a processor (not shown) or an external device of the display device 100. The present invention is not limited to this, and may be controlled by a switch provided in the display device 100. As a switch provided in the display device 100, for example, there is a “multi-stage switch that can be moved in at least three stages corresponding to the number of marks and can switch the light source to be turned on and off each time it is moved”. Note that the number of stages of the multistage switch is not limited to three, and the multistage switch may be capable of turning off all the light sources.

  The above-mentioned configuration shows an example of the embodiment of the present invention, and naturally belongs to the technical scope of the present invention.

100 display device, 102 1st polarization member, 104 2nd polarization member, 106 display part, 108 light-shielding member, 110 light attenuation member, 112 3rd polarization member, 114 4th polarization member, 116 color filter, LS1 1st light source, LS2 second light source, LS3 third light source, LS4 fourth light source

Claims (4)

A first light source unit that outputs a first polarized light having a first polarization axis;
A second light source unit that outputs a second polarized light having a polarization axis orthogonal to the first polarized light;
One or both of the first polarized light output from the first light source unit and the second polarized light output from the second light source unit are provided with three marks, and A display section that displays the corresponding mark,
Equipped with
The first light source unit,
A first light source that emits light of a first color;
A second light source that emits light of a second color that does not overlap in wavelength with the first color;
Of the light emitted from each of the first light source and the second light source, a first polarizing member that transmits the first polarized light and does not transmit the second polarized light,
Have
The second light source unit,
A third light source that emits light of the first color;
A fourth light source that emits light of the second color;
Of the light emitted from each of the third light source and the fourth light source, a second polarizing member that transmits the second polarized light and does not transmit the first polarized light,
Have
The display unit is
A third polarizing member, which is provided with a part of the three marks and is not provided with the mark, transmits the first polarized light and does not transmit the second polarized light.
A fourth polarizing member which is provided with the remaining marks of the three marks and which transmits the second polarized light and does not transmit the first polarized light;
A color filter that outputs the light corresponding to the mark according to the incident light,
And a display device. The light of the first color is light of one of blue and red,
The display device according to claim 1, wherein the light of the second color is light of the other color of blue and red. When displaying the first mark of the three marks, the first light source is turned on,
When displaying the second mark of the three marks, the second light source and the fourth light source are turned on,
The display device according to claim 1 or 2, wherein the third light source is turned on when displaying a third mark of the three marks. The display device according to claim 1, further comprising a light attenuating member that attenuates the light output from the display unit.

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