JP2007298844A - Light beam controlling film apparatus, light beam controller, illumination angle varying light source, display with the same and terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inexpensively achieve a light beam controlling film apparatus having a function for improving an optical directional characteristic, achieving a large area and the high image quality, and preventing moire stripes from being generated, and to provide a display for controlling a viewing angle on a display screen by using the light beam controlling film apparatus. <P>SOLUTION: Films 2, 3 have inclined optical axes, and are attached between two polarization plates 1 so as to make projections of the optical axes be orthogonal to each other. Thus the light with high directional characteristics is obtained. A transparent-scattering element 10 is disposed in an upper part for electrically switching between a transparent state and a scattering state, and electrically controls the directional characteristic of a light flux. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a display device, and more particularly to a display device capable of changing a visibility angle range.

  2. Description of the Related Art In recent years, a display device that displays various types of information on a screen as characters or images has been required to have a function for protecting information secret. For example, in a financial terminal known as ATM, when a personal password is input, a function for preventing the personal identification number from being viewed by others or a mobile phone or the like prevents incoming information from being viewed by others. Function is required. Furthermore, a PDA, a notebook PC, and the like are also required to have the same function when used in transportation such as a train.

  On the other hand, the display device is also required to have a function that allows a plurality of people to view the screen. For example, TV display on a mobile phone or the like corresponds to this example. Further, there are cases where a plurality of people want to view the data screen of the notebook PC.

  Thus, the display device is required to have a contradictory display function, and in order to satisfy this, a display device having a screen display switching function is considered. That is, there is a demand for a display device that can switch between a narrow-field display mode in which highly confidential information is viewed by an individual and a wide-field display mode in which highly public information can be viewed by a plurality of people.

  As a display device having such a switching function, a display device as disclosed in Patent Document 1 is disclosed. This will be described with reference to FIG. As shown in FIG. 14, the display device of Patent Document 1 includes a light source 11, a first optical element 31, a second optical element 32, and a liquid crystal display element 30. The 1st optical element 31 is arrange | positioned in order to improve the directivity of the light from the light source 11, and a louver film is mentioned specifically ,. On the other hand, the second optical element 32 is an element that can be switched between a scattering state and a transparent state by a voltage. As specific elements for realizing the second optical element 32, there are scattering type liquid crystal elements such as polymer dispersed liquid crystal, polymer network liquid crystal, and capsule type liquid crystal. Further, a normal transmissive liquid crystal display device 30 is used as a display panel.

  The operation principle of the display device of Patent Document 1 will be described. In the narrow viewing angle display mode, the second optical element 32 is in a transparent state, and the light from the light source 11 passes through the first optical element 31 and maintains the high directivity while maintaining the transmissive liquid crystal display device 30. Is incident on. The transmissive liquid crystal display device 30 creates a display image by a plurality of pixels, but does not greatly change the directivity of incident light. For this reason, although a display image can be visually recognized by an observer in front of the display device, the display image does not reach an observer positioned obliquely from the front of the display device, and cannot be visually recognized.

  On the other hand, in the wide viewing angle display mode, the second optical element 32 is in a scattering state, and highly directional light that has passed through the first optical element 31 becomes scattered light by the second optical element 32. . This scattered light becomes incident light of the transmissive liquid crystal display device 30. For this reason, not only an observer in front of the display device but also an observer positioned obliquely to the display device can visually recognize the display image.

  Here, in Patent Document 1, a louver film is exemplified as the first optical element 31 in FIG. 14, and the light source 11 is diffused light and has low directivity. Therefore, a straight louver is used to improve this. FIG. 15 shows the basic structure of a linear louver. In such a louver film, transparent layers 33 and light absorption layers 34 are alternately arranged on the film surface. Therefore, only the light A 36 that can pass through the transparent layer 33 out of the light incident on the surface of the louver film is emitted, and the other light B 35 is absorbed by the light absorbing layer 34.

  Moreover, such a louver film is manufactured by a manufacturing method as shown in FIG. A large number of transparent films 37 and light-absorbing films 38 are alternately laminated and bonded, and the resulting laminated film block 39 is sliced in the vertical direction. The louver structure shown in FIG. 15 is completed by placing the slice piece 40 on the film base material.

JP-A-9-197405

  However, when a display device having a viewing angle control function using a louver as shown in Patent Document 1 is put into practical use, the following disadvantages occur.

  First, it is difficult to produce a large louver film. As can be seen from the manufacturing method of FIG. 16, the maximum size of the louver film is determined by the size of the laminated film block 39. For this reason, when a louver film is considered for a display device having a larger display screen, it is difficult to create the louver film.

  Second, even if a louver for a large screen can be created, there is a disadvantage that it becomes very expensive. When creating a small louver, a large number of slice pieces shown in FIG. 16 can be obtained by dividing the louver. However, since the number of large louvers is small, even if it can be realized, it is very expensive. .

  Third, when a louver film is used as the first optical element 31 in FIG. 14, the display image quality is deteriorated. This will be described with reference to FIG. FIG. 17 is a diagram more practically showing the configuration shown in FIG. A louver 41 is used as the first optical element 31. Further, the transparent-scattering element 10 is used as the second optical element 32. When the transparent-scattering element 10 is in a transparent state, highly directional light from the louver 41 is incident on the transmissive display device 15. However, the louver 41 has a periodic transmittance distribution as shown in FIG. On the other hand, the transmissive display device 10 also has a periodic transmittance distribution due to the black matrix or the color filter. For this reason, moire fringes that occur when layers having a periodic transmittance distribution are stacked. Therefore, an image in which the moire fringes are superimposed on the display image is displayed, and the image quality is deteriorated.

  Therefore, the present invention has a function of increasing the directivity of light like a louver film, can realize low cost, large area, high image quality, and uses a film device for light control that does not generate moire fringes, An object of the present invention is to provide a display device capable of controlling the viewing angle of a screen.

  In order to achieve the above object, the light control film device of the present invention comprises two polarizing plates, and two inclined optical axis films in which at least a part of the optical axis is inclined with respect to the film surface, The two inclined optical axis films are located between the two polarizing plates, and are arranged so that the projection directions of the optical axes of the film into the film plane are orthogonal to each other. ).

  According to such a film device for light control, the diffused light can be changed to highly directional light. Assuming that the optical axis projection of the first inclined optical axis film is in the X-axis direction, the transmittance of light whose incident surface is the YZ plane is reduced among the diffused light incident on this film. This is because if the optical axis projection of the tilted optical axis film of the eye is in the Y-axis direction, the transmittance of light incident from the XZ plane among the light passing through the first sheet is reduced. Moreover, since such a film device for light control is comprised from the polarizing plate and the inclination optical axis film, it is applicable to a large area, and a moire fringe does not generate | occur | produce.

  Furthermore, the above-mentioned film device for light control uses two inclined optical axis films, and the projection direction of each optical axis of the film into the film plane is parallel to either the transmission axis or the absorption axis direction of the polarizing plate. (Claim 2).

  In this way, the light transmittance in the film normal direction is not reduced. This is because even if a birefringent body exists between the polarizing plates, the transmittance does not change as long as the in-plane projection is in the transmission axis direction or the absorption axis direction of the polarizing plate.

  In addition, the above-described film device for light control includes at least one polymer film having an optical axis in the film in-plane direction, disposed between two polarizing plates, and the polymer film is optically coupled to the film. You may arrange | position so that an axial direction may become in parallel with either the transmission axis of a polarizing plate, or an absorption axis direction (Claim 3).

  In this way, the tilted optical axis film and the polarizing plate are supported by a film having a normal uniaxial birefringence, and it is not necessary to support using a heavy glass substrate or an expensive low birefringence film, A thinner and lighter light control film device can be realized.

  Next, the light beam control device according to the present invention electrically conducts the straight light emission and the scattering light emission of the incident light so as to face one of the outer surfaces of the two polarizing plates of the light control film device described above. A transparent-scattering element capable of switching control is provided and provided (claim 4). In this way, it is possible to electrically control the illumination angle of the emitted light.

  Next, the illumination angle variable light source device of the present invention is characterized in that a light source is arranged facing the opposite surface of the light control device on the side where the transparent-scattering element is present (Claim 5). ). In this way, it is possible to obtain a light source that can vary the directivity of light. Examples of the shape of the light source include a surface light source and a line light source.

  Next, the display device of the present invention is arranged such that the self-luminous display device faces the light control device side facing the surface on which the transparent-scattering element of the light control device described above is present. (Claim 6). In this way, the self-luminous display device can have two display modes. In general, the self-luminous display device is not suitable for displaying highly confidential information because the display light is diffused light. However, by using the present invention, it is possible to display a highly confidential image.

  Further, the display device of the present invention is arranged so that either the reflective display device or the transflective display device faces the opposite surface of the light control device on the side where the transparent-scattering element is present. Is arranged so as to face the light control device side (claim 7). In this manner, a display device including a reflective display can have two display modes. For this reason, it is possible to perform confidential display when used outdoors or on a portable device.

  Further, the display device of the present invention is opposite to the surface on the side where the light source of the illumination angle variable light source device described above is located, and either the transmissive display device or the transflective display device is disposed on the display surface. You may arrange | position so that it may face the opposite of the illumination angle variable light source side (Claim 8). In this manner, a display device including a transmissive display can have two display modes.

  Next, a terminal device according to the present invention includes any one of the display devices described above (claim 9). In this way, it is possible to display and use a confidential screen on various terminals.

  Since the present invention is configured and functions as described above, it is possible to increase the directivity of light without generating moire fringes, and to provide a light control film device that can be applied to a large screen at low cost. Can do. And it becomes possible to provide the display apparatus which can control the viewing angle switching of a display screen using the light beam control apparatus provided with this light control film apparatus.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram illustrating a configuration of a display device according to the present embodiment.

  As shown in FIG. 1, the display device according to the present embodiment includes a variable illumination angle light source device 26 including a backlight 20 that functions as a light source and a light beam control device 25, and a transmissive display device 15.

  As the transmissive display device 15, a liquid crystal panel employing a driving method such as a horizontal electric field method, a multi-domain method, or a twisted nematic method can be used. In any case, one pixel constituting the display screen is composed of a color filter layer 16, a thin film transistor (not shown), a common electrode 17, and a pixel electrode 18, and between the common electrode 17 and the pixel electrode 18. The liquid crystal layer 21 is interposed. In addition, polarizing plates 1 are disposed above and below the transmissive display device 15.

  The light beam control device 25 described above includes two polarizing plates 1, tilted optical axis films 2 and 3 in which at least a part of the optical axis is tilted with respect to the film surface, and a high optical axis in the in-plane direction of the film. A transparent-scattering element 10 that can be electrically switched and controlled between a straight light emission and a scattering emission of incident light is laminated on a light control film device 9 constituted by a molecular film 8. .

  Among these, the two inclined optical axis films 2 and 3 are located between the two polarizing plates 1 and are arranged so that the projection directions of the optical axes of the film into the film plane are orthogonal to each other. Furthermore, the film is arranged such that the projection direction of each optical axis of the film into the film plane is parallel to either the transmission axis or the absorption axis direction of the polarizing plate 1.

  The polymer film 8 in the light beam control device 25 is arranged so that the optical axis direction thereof is parallel to either the transmission axis direction or the absorption axis direction of the polarizing plate 1. Further, the transparent-scattering element 10 is disposed so as to face one of the outer surfaces of the two polarizing plates 1.

  Here, the light beam control device 25 in the present embodiment will be described with reference to FIGS.

  FIG. 2 is a diagram in which the inclined optical axis films 2 and 3 in the present embodiment are arranged between two polarizing plates 1. In FIG. 2, the direction of the transmission axis 6 between the polarizing plates 1 is the X-axis direction. The optical axes 4 of the inclined optical axis films 2 and 3 are inclined from the film surface. When the optical axes 4 of the inclined optical axis films 2 and 3 are projected in the film plane, the optical axis projection 5 of the inclined optical axis film 2 faces the X direction, and the optical axis projection 5 of the inclined optical axis film 3 is Y. Facing the direction. Thus, the two optical axis projections 5 of the inclined optical axis films 2 and 3 are arranged so as to be orthogonal to each other. One optical axis projection 5 coincides with the transmission axis direction of the polarizing plate 1, and the other optical axis projection 5 coincides with the absorption axis direction of the polarizing plate 1.

  For comparison with the film shown in FIG. 2, a film as shown in FIGS. 3 and 4 is considered simultaneously. The optical axes 4 of both optical compensation films 7a shown in FIG. 3 are in the in-plane direction of the film, and the optical axes 4 of both optical compensation films 7b shown in FIG. 4 are in the normal direction of the film surface.

  When diffused light enters the film shown in FIGS. 2, 3, and 4, the light transmittance in the film normal direction is the same in each case of FIGS. This is because even if a birefringent body exists between the polarizing plates 1, the transmittance does not change as long as the in-plane projection is in the transmission axis direction or the absorption axis direction of the polarizing plate 1.

  Next, consider incident light in an oblique direction. In the case of FIG. 3, it can be seen that the transmittance distribution as shown in FIG. 5 is obtained, and the beam directivity hardly changes. Also in the case of FIG. 4, similar results are obtained. On the other hand, in the case of FIG. 2, it can be seen that the transmittance distribution as shown in FIG. 6 is obtained and the light directivity is increased. This can be understood by considering the transmittance distribution at each stage in FIG.

  In the film shown in FIG. 2, when the diffused light passes through the tilted optical axis film 2 having the optical axis projection 5 in the X direction, the transmittance of light incident from the incident surface YZ decreases. Further, the light that has passed through the inclined optical axis film 3 having the optical axis projection 5 in the Y direction has a reduced transmission axis of light incident from the incident surface XZ. That is, in order to change the diffused light into highly directional light as shown in FIG. 6, a film having an inclined optical axis is required, and the optical axis projections 5 on the film plane are orthogonal to each other. It is indispensable. Further, in order not to reduce the transmittance in the normal direction, both optical axis projections 5 need to coincide with the transmission axis or absorption axis of the polarizing plate 1. Therefore, the transmission axis 6 of the polarizing plate 1 in FIG. 2 may be read as the absorption axis.

  FIG. 7 is a diagram showing a light control film device 9 in which a polymer optical film 8 having birefringence is added to the configuration of FIG. The optical axis 4 of the polymer film 8 is in the film plane. Further, in order not to reduce the transmittance in the normal direction, the optical axis 4 must be arranged so as to coincide with the transmission axis 6 or the absorption axis of the polarizing plate 1. Alternatively, as shown in FIG. 8, the optical axis 4 must be orthogonal to the transmission axis 6 of the polarizing plate 1. The light transmittance distribution in such a configuration is almost the same as in FIG. The function of the light control film device 9 shown in FIGS. 7 and 8 does not change depending on the order of lamination of the respective films or the number of polymer films 8.

  By laminating the transparent-scattering element 10 on the light control film device 9 shown in FIGS. 7 and 8, a light control device 25 capable of varying the illumination angle can be obtained. The transparent-scattering element 10 is typically made of a liquid crystal / polymer composite. A composite of a liquid crystal and a polymer has a structure in which a polymer phase and a liquid crystal phase are finely interlaced. When the liquid crystal phase is not aligned, a mismatch occurs between the polymer phase and the refractive index, resulting in a scattering state. On the other hand, when a liquid crystal phase is aligned by applying a voltage or the like, refractive index matching occurs with the polymer phase, and a transparent state is obtained. In this way, it is possible to electrically switch between the transparent state and the scattering state.

  By stacking the light source 11 on the light beam control device 25 described above, the illumination angle variable light source device 26 shown in FIG. 9 can be realized. The diffused light from the light source 11 is emitted with enhanced directivity by the light control film device 9. When the transparent-scattering element 10 is in the scattering state, the light is diffused again to become diffused light. When the transparent-scattering element 10 is in a transparent state, light is emitted while maintaining high directivity. In this way, an illumination light source with a variable illumination angle range is obtained.

  Next, a method for producing the tilted optical axis film 2 or 3 will be described. FIG. 10 is a diagram showing the inclined optical axis film 2 or 3. First, a method for forming the inclined optical axis film 2 or 3 will be described. An alignment film 27 is formed on the polymer film 8 with a polyimide solution or the like, and then the surface of the alignment film 27 is rubbed in the optical axis direction of the polymer film 8. Further, a liquid crystal monomer solution that can be photocured is applied to the surface of the alignment film 27, the solvent of the liquid crystal monomer solution is evaporated, and the temperature at which the liquid crystal monomer exhibits a liquid crystal phase is set. The liquid crystal monomer is cured by irradiating light such as ultraviolet light at this temperature to generate the liquid crystal monomer layer 29.

  The bottom surface of the liquid crystal monomer layer 29 is composed of the surface of the alignment film 27 subjected to the rubbing treatment, and the rubbing direction 28 exists, so that the pretilt direction exists. On the other hand, since the outermost surface of the liquid crystal monomer layer 29 is an air layer, the liquid crystal monomer layer 29 tends to be aligned perpendicular to the air interface. For this reason, the alignment distribution in the depth direction of the liquid crystal monomer layer 29 is arranged as shown in FIG. Since this arrangement is fixed by photocuring, the inclined optical axis films 2 and 3 having the inclined optical axis are formed. The direction of the tilt optical axis can be determined by the rubbing direction 28.

  In the present embodiment, the liquid crystal monomer layer 29 is shown as a molecular structure having a positive refractive index anisotropy Δn. However, a similar structure can be obtained even when a discotic liquid crystal having a molecular structure having a negative refractive index anisotropy Δn is used. The same effect can be obtained even with a liquid crystal layer having a negative refractive index anisotropy Δn.

  Two layers of the tilted optical axis film thus formed are prepared, bonded so that the rubbing directions 28 are orthogonal, and the polarizing plate 1 is bonded to the upper and lower sides, whereby the light control film device 9 can be obtained.

  Further, the transparent-scattering element 10 can be obtained as follows. A mixture of photocurable resin and liquid crystal is prepared by sandwiching it between the polymer films 8. At this time, it is desirable to spread between the polymer films 8 at a temperature at which the photocurable resin and the liquid crystal form a uniform mixture. Thereafter, photocuring treatment such as ultraviolet rays is performed. As a result, the photo-curing resin is cured, but the liquid crystal is deposited to form a region that becomes the liquid crystal phase 23. In this way, the liquid crystal phase 23 embedded in the photocurable resin matrix 24 is created. The liquid crystal phase 23 is randomly oriented and has a refractive index that does not match that of the photocurable resin matrix 24, and thus exhibits a scattering state. When a voltage is applied to this element, the liquid crystal molecules in the liquid crystal phase 23 are aligned perpendicular to the electric field. For this reason, the refractive index of the liquid crystal phase 23 changes. If the refractive index of the liquid crystal phase 23 at this time is adjusted to coincide with the refractive index of the photocurable resin matrix 24, a transparent state can be obtained. In this way, the transmission-scattering element 10 capable of electrically switching between the transparent state and the scattering state can be created.

  The transparent-scattering element 10 and the light-control film device 9 thus created are attached to the back surface of the transmissive display device 15 as shown in FIG. By applying a voltage to the element 10, the directivity of the light source can be controlled, and a display device capable of adjusting the viewing angle range is created.

  In the display device shown in FIG. 11, when the transparent-scattering element 10 is in a transparent state, the light from the backlight 20 is collimated (parallelized) and passes through the transmissive display device 15. For this reason, since the display screen is composed of collimated light, the viewing angle range is narrow. On the other hand, when the transparent-scattering element 10 is in the scattering state, the collimated light is scattered again by the transparent-scattering element 10. For this reason, a display image with a wide viewing angle range is obtained.

  The display device of the present embodiment shown in FIG. 1 includes a light control film device 9 having the functions as described above, a transparent-scattering element 10, a transmissive display device 15, and a backlight 20. Yes. When the diffused light from the backlight 20 enters the light beam control film device 9, the diffused light is converted into highly directional light and emitted from the light beam control film device 9, and this highly directional light is transparent-scattered. Incident on the element 10.

  At this time, when the transparent-scattering element 10 is in a transparent state, the highly directional light is emitted as it is and passes through the transmissive display device 15, so that the display screen is in a narrow viewing angle range. On the other hand, when the transparent-scattering element 10 is in the scattering state, the highly directional light is scattered again by the transparent-scattering element 10 and emitted. For this reason, the display screen has a wide viewing angle range.

  Then, by installing the display device of the present embodiment in a terminal as shown in FIG. 18, it is possible to select a display image state according to the use situation.

  Here, the display device of the present embodiment is configured by installing the transmissive display device 15, but is not limited to the transmissive display device 15, and a self-luminous display device and a reflective display device are installed. It may be configured.

  FIG. 12 is a diagram showing a display device when the self-luminous display device 12 is used. As the self-luminous display device 12, a plasma display, an electroluminescent display, or the like is used. When the transparent-scattering element 10 is in a transparent state, the display light from the self-luminous display device 12 is collimated and emitted in the front direction. When the transparent-scattering element 10 is in a scattering state, collimated light is scattered and becomes display light. In this way, the viewing angle range of the display screen of the self-luminous display device 12 can be controlled.

  FIG. 13 is a diagram showing a display device when a reflective display device 13 is used. The reflective display device 13 includes a reflective display device that can reflect the entire pixel region, and a transflective display device that can reflect and display a part of the pixel region. A liquid crystal is used as the reflective display device. A reflective display panel or an electrophoretic display panel can be used, and a display panel made of a liquid crystal element can be used as the transflective display device.

  In the display device shown in FIG. 13, when the transparent-scattering element 10 is in a transparent state, the reflected display light from the display device 13 follows the following path to become display light. Incident light from the outside is collimated and enters the display device 13. Thereafter, the light is reflected in the display device 13. Generally, the reflected light from the display device 13 is set to be scattered. This reflected light is collimated again and emitted. Thus, in the case of reflective display, since the light control film device 9 is passed twice, display is performed in a more directional state. On the other hand, when the transparent-scattering element 10 is in the scattering state, the reflected display light is emitted as scattered light, so that wide visibility is obtained.

  As described above, according to the present embodiment, the diffused light incident on the light beam control device 25 is emitted with the directivity changed in accordance with the voltage applied to the transparent-scattering element 10, so that the viewing angle of the display screen The range can be switched. Therefore, it is possible to provide a display device capable of switching between a narrow-field display mode in which highly confidential information is visually confirmed by an individual and a wide-field display mode in which highly public information can be viewed by a plurality of people.

It is a figure which shows the structure of the display apparatus of one Embodiment in this invention. It is the figure which has arrange | positioned the inclination optical axis film in embodiment shown in FIG. 1 between two polarizing plates. It is the figure which has arrange | positioned the optical compensation film which has an optical axis in a film surface between two polarizing plates. It is the figure which has arrange | positioned the optical compensation film which has an optical axis in a film surface normal direction between two polarizing plates. It is a figure which shows the relationship between the incident angle of the incident light in the film shown in FIG. 3 or FIG. 4, and the transmittance | permeability. It is a figure which shows the relationship between the incident angle of the incident light in the film shown in FIG. 2, and the transmittance | permeability. It is a figure which shows the film apparatus for light control which added the polymer optical film to the structure of the film shown in FIG. It is a figure which shows the film apparatus for light control which added the polymer optical film to the structure of the film shown in FIG. It is a figure which shows the illumination angle variable light source device in embodiment shown in FIG. It is a figure which shows the inclination optical axis film in embodiment shown in FIG. It is a figure which shows schematic structure of embodiment shown in FIG. It is a figure which shows schematic structure of embodiment shown in FIG. It is a figure which shows schematic structure of embodiment shown in FIG. The figure for demonstrating the structure of patent document 1 The figure for demonstrating the structure of the louver described in patent document 1 The figure for demonstrating the manufacturing method of the louver shown in FIG. It is the figure which showed the structure shown in FIG. 14 more practically. It is a figure which shows the terminal which mounts the display apparatus of embodiment shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Polarizing plate 2 Inclined optical axis film 3 Inclined optical axis film 4 Optical axis 5 Optical axis projection 6 Transmission axis 7a Optical compensation film 7b Optical compensation film 8 Polymer film 9 Light control film device 10 Transparent-scattering element 11 Light source 12 Self Light emitting display device 13 Reflective display device 15 Transmission type display device 16 Color filter layer 17 Common electrode 18 Pixel electrode 19 Thin film transistor array substrate 20 Backlight 21 Liquid crystal layer 22 Transparent electrode 23 Liquid crystal phase 24 Photocurable resin matrix 25 Light control device 26 Light source device with variable illumination angle 27 Alignment film 28 Rubbing direction 29 Liquid crystal monomer layer 30 Liquid crystal display element 31 First optical element 32 Second optical element 33 Transparent layer 34 Light absorption layer 35 Light A
36 Light B
37 transparent film 38 light absorbing film 39 laminated film block 40 slice piece

Claims (9)

Two polarizing plates, and two inclined optical axis films in which at least a part of the optical axis is inclined with respect to the film surface,
The two inclined optical axis films are located between the two polarizing plates, and are arranged so that the projection directions of the optical axes of the film into the film plane are orthogonal to each other. Film equipment. In the light control film device according to claim 1,
The two inclined optical axis films are arranged so that the projection direction of each optical axis of the film into the film plane is parallel to either the transmission axis or the absorption axis direction of the polarizing plate. A film device for controlling light. In the film device for light control according to claim 1 or 2,
At least one polymer film having an optical axis in the in-plane direction of the film is disposed between the two polarizing plates, and the optical axis direction of the film is the transmission axis or absorption of the polarizing plate. A film device for light control, wherein the film device is arranged so as to be parallel to any one of axial directions.   4. The light beam control film device according to any one of claims 1 to 3, wherein one of the two polarizing plates is opposed to any one of the outer surfaces of the polarizing plate, and the linearly emitted light and the scattered light are electrically output. A light beam control device comprising a transparent-scattering element that can be switched and controlled in an automatic manner.   5. An illumination angle variable light source device comprising: a light source arranged opposite to a surface opposite to the side where the transparent-scattering element is present of the light beam control device according to claim 4.   The self-luminous display device is disposed so as to face the surface opposite to the side where the transparent-scattering element is present of the light control device according to claim 4 so that the display surface faces the light control device side. A display device characterized by that.   The light control device according to claim 4, wherein the light control device is opposed to a surface opposite to the surface on which the transparent-scattering element is present, and either a reflective display device or a transflective display device is used, and the display surface is the light beam. A display device characterized by being arranged to face the control device side.   The illuminating angle variable light source device according to claim 5, wherein the illuminating angle variable light source device is opposed to a surface opposite to the surface on which the light source is present, and either the transmissive display device or the transflective display device is arranged, and the display surface is the illuminating angle. A display device, wherein the display device is arranged to face the opposite side of the variable light source device side.   A terminal device comprising the display device according to any one of claims 6 to 8.

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