JP2008262107A - Directivity-expressing display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a directivity-expressing display device which permits high visibility for external light. <P>SOLUTION: The directivity-expressing display device capable of simultaneously displaying a plurality of images having the directivity includes: a liquid crystal panel which comprises a liquid crystal layer constituting a plurality of pixel dots and a transmission/reflection layer which is disposed on the back surface side of the liquid crystal layer, reflects light made incident from the front surface side of the liquid crystal layer and transmits light made incident from the back surface side of the liquid crystal layer, and forms a plurality of images with the plurality of pixel dots; and a barrier which has a plurality of light-shielding parts and a plurality of opening parts and is arranged on the front surface side of the liquid crystal layer in order to optically separate the plurality of images. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a directional display that can simultaneously display a plurality of images having directivity, such as a two-screen display or a 3D display.

  Conventionally, for example, as described in Patent Document 1 below, a directional display display such as a 3D display has a barrier disposed on the front surface of a transmissive liquid crystal panel so that a plurality of directional images are displayed. By separating, directional display is realized.

JP-A-8-331605 JP 2005-181668 A

  Here, the barrier partially blocks the image light emitted from the transmissive liquid crystal panel and separates it into a plurality of images. Therefore, when an observer views these images, the normal one screen is displayed. Compared with the case of display, there was a problem that it looked dark and visibility deteriorated.

  In addition, since the transmissive liquid crystal panel has low visibility with respect to external light compared to the reflective liquid crystal panel, in a directional display using the transmissive liquid crystal panel having such characteristics, When external light is strong, there is a problem that visibility is further deteriorated.

  Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art and provide a directional display capable of suppressing deterioration in visibility even when external light is strong.

  SUMMARY An advantage of some aspects of the invention is to achieve at least a part of the above object, and the invention can be implemented as the following forms or application examples.

Application Example 1 A directional display capable of simultaneously displaying a plurality of images having directivity, the liquid crystal layer forming a plurality of pixel dots, provided on the back side of the liquid crystal layer, A liquid crystal layer that reflects light incident from the front side of the liquid crystal layer and transmits / reflects light incident from the back side of the liquid crystal layer, and forms the plurality of images by the plurality of pixel dots. A panel, and a barrier having a plurality of light-shielding portions and a plurality of openings and arranged on the front side of the liquid crystal layer in order to optically separate the plurality of images. Sex display.

  As described above, the directional display described in Application Example 1 also functions as a reflective liquid crystal panel having high visibility with respect to external light by using external light as illumination light as compared with a transmissive liquid crystal panel. The liquid crystal panel is used as a display panel. For this reason, even when external light is strong, such as under sunlight, it can suppress that visibility deteriorates.

Application Example 2 The directional display according to Application Example 1, wherein each light shielding portion in the barrier includes a light reflection layer on the back side of the barrier.

  By doing so, it is possible to reuse the light shielded by the barrier by reflecting it with the light reflecting layer, and the visibility to external light can be further enhanced. In addition, for example, even when a backlight is used as a lighting device and the liquid crystal panel functions as a transmissive liquid crystal panel, the light shielded by the barrier can be reflected by the light reflecting layer and reused. Visibility to light can be increased.

Application Example 3 In the directional display according to Application Example 1 or Application Example 2, each light shielding portion in the barrier includes a non-reflective layer on the front side of the barrier. display.

  By so doing, outside light is hardly reflected by the barrier, and so-called reflection can be prevented.

Application Example 4 In the directional display according to any one of Application Examples 1 to 3, the liquid crystal panel includes a front side polarizing plate disposed on a front side of the liquid crystal layer and a back side of the liquid crystal layer. The directional display is characterized by comprising a back-side polarizing plate disposed on the front surface, and the front-side polarizing plate is disposed on the front surface of the barrier.

  By doing so, the separation efficiency of a plurality of images can be increased.

Application Example 5 In the directional display according to any one of Application Example 1 to Application Example 4, each opening in the barrier has a display number n (n is an integer of 2 or more). A directional display, wherein one opening is provided so as to correspond to n pixel dots of the liquid crystal panel.

  By doing so, n images formed by the liquid crystal panel can be optically separated.

Application Example 6 In the directional display according to any one of Application Examples 1 to 5, the pitch between the adjacent openings in the barrier is L, and one image is formed on the liquid crystal panel. The directional display according to claim 1, wherein the distance L is smaller than the distance M when the pitch between adjacent pixel dots is M among the plurality of image dots.

  With such a configuration, n images formed by the liquid crystal panel can be efficiently separated.

Application Example 7 In the directional display according to any one of Application Examples 1 to 6, the light shielding portion and the opening in the barrier are arranged in a checkered pattern. Directional display display.

Application Example 8 In the directional display according to any one of Application Examples 1 to 6, the light shielding portion and the opening in the barrier are arranged in a stripe shape. Directional display display.

  The image quality of each displayed image can be improved by arranging the light shielding portion and the opening portion in a checkered pattern or a stripe pattern.

  Note that the present invention is not limited to the above-described apparatus invention such as a directional display, but can also be realized as a method invention such as an image display method.

A. Example configuration:
FIG. 1 is an explanatory view schematically showing a cross section of a directional display as an embodiment of the present invention. The directional display 100 according to the present embodiment is a two-screen display or a 3D display that can display two images (a first image and a second image) at the same time. As shown in FIG. 1, the directional display display 100 according to this embodiment is disposed on a front surface of a transflective liquid crystal panel (also referred to as a “semitransmissive reflective liquid crystal panel”) 110 and a transflective liquid crystal panel. A barrier 150 and a backlight 180 disposed on the rear surface of the transflective liquid crystal panel are provided.

  In the transflective liquid crystal panel 110, a light reflecting film 118 is formed on a glass substrate 116. The light reflecting film 118 preferably has a diffusibility for diffusing the reflected light into white light. Such diffusivity can be configured, for example, by providing a transparent diffusive sheet on the surface of the reflective surface, or by providing fine irregularities on the surface of the reflective surface. The light reflecting film 118 is provided with through holes 120 corresponding to a plurality of pixel dots. The position and number of the through holes are not particularly limited, and various configurations can be adopted. In FIG. 1, one through hole 120 is provided in the center of each pixel dot.

  On the light reflection film 118, a color filter 122 composed of three colors of red (R), blue (B), and green (B) is formed corresponding to a plurality of pixel dots. A transparent counter electrode 124 is formed on the color filter 122. A liquid crystal layer 126 is formed on the front surface of the counter electrode 124, and a plurality of transparent pixel electrodes 128 are formed on the front surface of the liquid crystal layer 126 corresponding to the plurality of pixel dots. A glass substrate 132 is provided on the front surface of the pixel electrode 128. Between each pixel electrode 128 on the glass substrate 132, a plurality of pixel switching TFTs (Thin Film Transistors), capacitive elements, signal lines, scanning lines, and other wirings are provided corresponding to each pixel electrode. Although not shown in FIG.

  A phase difference plate (for example, a λ / 4 plate) 114 and a polarizing plate 112 are formed on the back surface of the glass substrate 116. A retardation plate (for example, a λ / 4 plate) 134 and a polarizing plate 136 are also formed on the front surface of the glass substrate 132. The phase difference plate 114 and the phase difference plate 134 are a phase of light incident from the back surface of the transflective liquid crystal panel 110 and emitted from the front surface, and a phase of light incident from the front surface of the transflective liquid crystal panel 110 and emitted from the front surface. And a phase difference plate for adjusting.

  The transflective liquid crystal panel 110 in this embodiment forms two images (a first image and a second image) by a plurality of pixel dots. One pixel dot is mainly composed of one pixel electrode 128, a portion of the counter electrode 124 facing the pixel electrode 128, a portion of the liquid crystal layer 126 sandwiched between the electrodes, and the pixel electrode 128. 124 and the like, and a portion of the color filter 122 facing each other. The plurality of pixel dots are divided into a first type of pixel dots 130a for forming a first image and a second type of pixel dots 130b for forming a second image. These are arranged alternately as shown in FIG.

  The barrier 150 includes a plurality of light shielding portions 152 and a plurality of openings 154 that are alternately arranged along the surface direction on the front surface of the transflective liquid crystal panel 110. In the light shielding unit 152, a non-reflective layer 158 that absorbs light (external light) from the front surface of the barrier 150 is formed on the back surface of the glass substrate 156, and a light reflective layer 160 is formed on the back surface of the non-reflective layer 158. It is constituted by. The non-reflective layer 158 is made of chromium oxide, for example. Further, like the light reflecting film 118, the light reflecting layer 160 preferably has a diffusibility for diffusing reflected light into white light.

  In the present embodiment, each opening 154 in the barrier 150 has one opening that is adjacent to two adjacent pixel dots of the transflective liquid crystal panel 110 (that is, the adjacent first type pixel dot 130a and the second pixel dot 130a). Each pixel dot is arranged so as to correspond to a pixel dot 130b). By doing so, the two images (first image and second image) formed by the transflective liquid crystal panel 110 can be optically separated. In the first observation area 190a in front of the directional display 100, the first image formed by the first type of pixel dots 130a can be observed, and in the second observation area 190b, A second image formed by the second type of pixel dots 130b can be observed. Moreover, both images can be observed simultaneously at the boundary between the first observation region 190a and the second observation region 190b.

B. Example operation:
FIG. 2 is an explanatory diagram showing an enlarged central part of the directional display 100 shown in FIG. FIG. 2 shows the distance between the transflective liquid crystal panel 110 and the barrier 150 apart from FIG. 1 for convenience of illustration, but the actual dimensions are set so as to have a relationship described later.

  In the following description, the light incident from the back surface of the transflective liquid crystal panel 110, that is, the light from the backlight 180 and the light incident from the front surface of the barrier 150 will be described in order.

  First, light incident from the back surface of the transflective liquid crystal panel 110 will be described.

  When the directional display 100 shown in FIG. 1 is activated and the backlight 180 emits light, the light illuminates the transflective liquid crystal panel 110 from the back side.

  Then, when an image signal (not shown) is input from the outside to the directional display 100, the transflective liquid crystal panel 110 is arranged between each pixel electrode 128 and the counter electrode 124 based on the image signal. In this case, a desired voltage is applied, and the liquid crystal layer 126 sandwiched between them is driven. Accordingly, a first image is formed by the plurality of first type pixel dots 130a, and a second image is formed by the plurality of second type pixel dots 130b.

  At this time, when light from the backlight 180 is incident on the transflective liquid crystal panel 110 from the back side, the light enters the light reflection film 118 via the polarizing plate 112, the retardation film 114, and the glass substrate 116. Reach (indicated by solid or dashed lines).

  Of the light that has reached the light reflecting film 118, light that has reached the through hole 120 provided corresponding to each pixel dot (shown by a solid line) passes through the through hole 120, and other light (shown by a broken line). ) Is reflected by the light reflecting film 118. The light reflected by the light reflection film 118 is emitted from the transflective liquid crystal panel 110 through the transflective liquid crystal panel 110 in a direction opposite to that before reflection, and is incident on the backlight 180. Note that light emitted from the back surface of the transflective liquid crystal panel 110 and incident on the backlight 180 will be described later.

  The light that has passed through the through hole 120 sequentially passes through the color filter 122, the counter electrode 124, the liquid crystal layer 126, the pixel electrode 128, the glass substrate 132, the phase difference plate 134, and the polarizing plate 136, thereby translucent liquid crystal. It is emitted from the front surface of the panel 110 and reaches the barrier 150. The light passing between these passes through the color filter 122 to be converted into R, G, and B colors, and further passes through the liquid crystal layer 126 driven by the pixel electrode 128 and the counter electrode 124. The signal is modulated according to the image signal. Therefore, the light passing in this way is converted into each color of R, G, and B, and modulated in accordance with the image signal. As a result, image light representing a color image is obtained. Will be formed.

  Of the light (image light) that has reached the barrier 150, light that has reached the opening 154 (indicated by a solid line or a one-dot chain line) passes through the opening 154, passes through the glass substrate 156, and is then displayed with directivity. Ejected from the display 100. On the other hand, the light (indicated by a dotted line) that has reached the light shielding unit 152 is blocked by the light shielding unit 152 and is not emitted from the directional display display 100. That is, only the light that has passed through the opening 154 can reach the first observation region 190a or the second observation region 190b.

  Here, as described above, each opening 154 is arranged so that one opening corresponds to the adjacent first type pixel dot 130a and second type pixel dot 130b, respectively. Therefore, of the light that has passed through each opening 154, all the light (shown by solid lines) that originated from the first type of pixel dot 130a is shown in FIG. 2, as shown in FIG. Therefore, all the light (indicated by the alternate long and short dash line) starting from the second type of pixel dot 130b reaches the second observation region 190b. In this way, the first image formed by the first type of pixel dots 130a and the second image formed by the second type of pixel dots 130b are each provided with directivity to optically. By separating, an observer (not shown) can observe the color first image in the first observation region 190a, and the color second image in the second observation region 190b. Can be observed. In addition, both the first image and the second image can be observed simultaneously at the boundary between the first observation region 190a and the second observation region 190b.

  On the other hand, of the light reaching the barrier 150, the light reaching the light shielding unit 152 (indicated by a dotted line) is reflected by the light reflecting layer 160, and therefore, the transflective liquid crystal is again transmitted from the front surface of the transflective liquid crystal panel 110. The light enters the panel 110 and reaches the light reflecting film 118 in the reverse direction before reflection. Of the light reaching the light reflecting film 118, light (not shown) reaching the through hole 120 passes through the through hole 120, passes through the glass substrate 116, the phase difference plate 114, and the polarizing plate 112. The light is emitted from the back surface of the transflective liquid crystal panel 110 and is incident on the backlight 180. On the other hand, other light (indicated by dotted lines) is reflected by the light reflecting film 118. The reflected light is converted into each color of R, G, and B, and is modulated in accordance with the image signal, similarly to the light that enters from the back surface of the transflective liquid crystal panel 110 and passes through the through hole 120. The light is used again as light and emitted as image light from the front surface of the transflective liquid crystal panel 110.

  In the directional display 100 according to the present embodiment, the image light blocked by the light shielding portion 152 of the barrier 150 is reflected by the light reflecting film 118 to be reused as image light emitted from the transflective liquid crystal panel 110. Therefore, it is possible to increase the brightness of the observed image by increasing the image light reaching the opening 154 of the barrier 150 and reaching the first observation region 190a and the second observation region 190b. It becomes possible.

  Note that, as described above, the light emitted from the backlight 180 also generates light (shown by a broken line) that is reflected by the light reflection film 118 and is incident on the backlight 180 again. The light is reflected by a reflection surface (not shown) in 180 and reused as light incident from the back surface of the transflective liquid crystal panel 110 again. Further, as described above, the light reflected by the light reflecting layer 160 of the barrier 150 is not reflected by the light reflecting film 118 but passes through the through hole 120 and enters the backlight 180 (not shown). However, this light is also reflected by the reflecting surface in the backlight 180 and reused as light incident from the back surface of the transflective liquid crystal panel 110. Therefore, the light emitted from the backlight 180 can be used as light passing through the through hole 120 except for light that disappears due to various losses.

  Next, light (external light) incident from the front surface of the barrier 150 will be described.

  Since the directional display display 100 of the present embodiment uses the transflective liquid crystal panel 110, external light incident from the front of the directional display display 100 can also be used as image light, as will be described below. is there. External light (not shown) incident from the front of the directional display 100 reaches the light shielding part 152 or the opening 154 through the glass substrate 156 in the barrier 150. In the opening 154, the reached light passes through the opening 154 and enters the transflective liquid crystal panel 110. This light (not shown) is used as image light by being reflected by the light reflecting film 118 in the same manner as the light reflected by the light reflecting layer 160 of the light shielding unit 152 (shown by a dotted line). . Further, since the front surface side of the light shielding portion 152 is formed of the non-reflective layer 158, the reached light is absorbed and hardly reflected.

  As described above, the directional display 100 in this embodiment uses the transflective liquid crystal panel 110. Since the transflective liquid crystal panel can use external light incident from the front as illumination light, visibility to external light can be improved compared to the case of using a conventional transmissive liquid crystal panel.

  Further, in the directional display 100 according to the present embodiment, the light reflecting layer 160 is provided on the back side of each light shielding portion 152 of the barrier 150. As a result, the light blocked by each light blocking portion 152 can be reused, so that it reaches the observer out of the light emitted from the backlight as compared with the case where a conventional transmissive liquid crystal panel is used. The amount of light that can be used as image light can be increased, and when light from a backlight is used as illumination light, visibility with respect to external light can be increased. Further, even when external light is used as illumination light, the visibility with respect to external light can be further improved as compared with the case where the light reflection layer 160 is not provided. In addition, when the outside light is strong, such as under sunlight, it is possible to display with high visibility using the outside light as illumination light, and when the outside light is weak or there is no outside light, Display with high visibility is possible using light from the light 180. Furthermore, when displaying using both external light and the light from the backlight 180, the power supplied to the backlight 180 can be reduced.

  Furthermore, each of the openings 154 in the barrier 150 is divided into two pixel dots each having one opening adjacent to the transflective liquid crystal panel 110 (that is, the adjacent first type pixel dot 130a and the second type dot). The pixels are arranged so as to correspond to the pixel dots 130b). Thereby, two images (first image and second image) formed by the transflective liquid crystal panel 110 can be optically separated.

  Further, a non-reflective layer 158 is provided on the front side of each light shielding portion 152 in the barrier 150. Thereby, external light is hardly reflected by the barrier 150, and what is called reflection can be prevented.

  As can be seen from the above description, the transflective liquid crystal panel 110 of this embodiment corresponds to the liquid crystal panel of the present invention, and the light reflection film 118 corresponds to the transmission / reflection layer of the present invention.

C. How to determine dimensions:
Next, in the directional display 100 according to the present embodiment, the gap between the light reflecting layer 160 and the pixel dots in the barrier 150 and the pitch between the openings 154 (or the pitch between the light shielding portions 152) are determined. How to do will be described. 3 and 4 are explanatory diagrams for explaining a method of determining the gap between the light reflecting layer and the pixel dots and the pitch between the openings in the directional display 100 of FIG.

  3 and 4, Q indicates the standard reachable range of the separated images. Specifically, it is a standard range in which the separated image can reach under an observer (not shown) in an appropriate display state. D indicates the observation distance. Specifically, this is a standard distance assumed from the directional display 100 to the observer. G indicates a gap between the light reflecting layer 160 in the barrier 150 and the pixel dots in the transflective liquid crystal panel 110. L indicates the pitch between the openings 154 in the barrier 150. M represents the pitch between adjacent pixel dots among the first type pixel dots 130a (or the second type pixel dots 130b) in the transflective liquid crystal panel 110. P indicates the width of the pixel dot. In this embodiment, twice the value of P corresponds to the value of M (2 × P = M).

  Of these values, each of Q, D, and M (= 2 × P) is a value given in advance, and each of G and L is determined based on these values.

  First, in FIG. 3, the light emitted from the point T in the first type pixel dot 130a passes through the point O in the opening 154 and reaches the point S in the first observation region 190a. On the other hand, the light emitted from the point U in the second type pixel dot 130b intersects the light from the point T at the point O in the opening 154 and reaches the point R in the second observation region 190b.

  Therefore, in FIG. 3, focusing on the triangle OSR that exists between the opening 154 and the observer and the triangle OTU that exists between the opening 154 and the pixel dot, both form a similar shape. Yes. Therefore, Formula (1) is materialized.

Q: P = D: G (1)
However, P = M / 2.

  Next, in FIG. 4, the light emitted from the center point of the transflective liquid crystal panel 110 and the boundary Y between the first type pixel dot 130a and the second type pixel dot 130b It passes through the point W in the part 154 and reaches the point V at the boundary between the first observation region 190a and the second observation region 190b. On the other hand, the light emitted from the point Z at the other boundary between the first type pixel dot 130a and the second type pixel dot 130b passes through the point X in the other opening 154 and passes through the first observation region. The point V at the boundary between 190a and the second observation region 190b is reached.

  Therefore, in FIG. 4, when attention is paid to the triangle VWX that exists between the observer and the opening 154 and the triangle VYZ that exists between the observer and the pixel dot, both form a similar shape. . Therefore, Formula (2) is materialized.

  M: D + G = L: D (2)

  Therefore, each value of G and L can be obtained and determined by solving the simultaneous equations of these equations (1) and (2).

  By the way, when the values of G and L are determined in this way, the value of L (that is, the pitch between the openings 154 in the barrier 150) and the value of M (that is, the first value in the transflective liquid crystal panel 110). Comparing the adjacent pixel dots of the first or second type of pixel dots 130a and 130b, the value of L is smaller than the value of M from equation (2). Therefore, two images (first image and second image) formed by the transflective liquid crystal panel 110 can be efficiently separated.

  Incidentally, if the value of L is equal to the value of M, an overlapping portion is formed on the viewer side between the first observation region 190a and the second observation region 190b, and the first image and the second image are formed. Cannot be separated efficiently.

  The above description has been a method for determining each value of G and L. However, in the case where the directional display display 100 of this embodiment is used as a two-screen display, the transflective liquid crystal panel 110 is used. It is preferable to reduce the thickness of the glass substrate 132, the phase difference plate 134, and the polarizing plate 136. In the case of a two-screen display, as compared with a 3D display, the angle of light emitted from the pixel dots toward the opening 154 (angle with respect to the emission surface) is as much as possible in order to take a wider observation area 190a, 190b. This is because it is desired to make it smaller. For the same reason, for example, the polarizing plate 136 may be provided on the front surface of the glass substrate 156 in the barrier 150. Even in the case of a 3D display, it is preferable to reduce the thickness of the glass substrate 132, the phase difference plate 134, and the polarizing plate 136 in the transflective liquid crystal panel 110 in accordance with an increase in the number of pixels.

D. Specific examples of barriers:
In the above description, the barrier 150 has no particular mention as to how the light shielding portion 152 and the opening 154 are arranged. Specifically, the arrangement shown in FIG. 5 or FIG. 6 is adopted. be able to. FIG. 5 is an explanatory diagram showing a specific example of the barrier 150 in FIG. 1 as viewed from the viewer side. FIG. 6 also shows another specific example of the barrier 150 in FIG. 1 as viewed from the viewer side. FIG.

  As described above, in the barrier 150, the plurality of light shielding portions 152 and the plurality of openings 154 are alternately arranged along the surface direction. Specifically, as shown in FIG. They may be arranged side by side, or may be arranged side by side in stripes as shown in FIG. By arranging in this way, the image quality of the displayed first and second images can be improved.

E. Variation:
The present invention is not limited to the above-described examples and embodiments, and can be implemented in various modes without departing from the scope of the invention.

  The transflective liquid crystal panel 110 used in the above embodiment uses a transflective liquid crystal panel having a structure in which a light reflecting film 118 having a through hole 120 is provided on the front surface of a glass substrate 116 on the back side. However, the present invention is not limited to this, and a transflective liquid crystal panel having various structures may be used. That is, a liquid crystal layer that forms a plurality of pixel dots, and a transmission / reflection device that is provided on the back side of the liquid crystal layer and reflects light incident from the front side of the liquid crystal layer and transmits light incident from the back side of the liquid crystal layer And a liquid crystal panel having a layer.

  In the above-described embodiment, the case where the directional display 100 is applied to a two-screen display or a 3D display capable of simultaneously displaying two images has been described. However, the present invention is not limited to this. For example, the present invention may be applied to an n-screen display image display capable of simultaneously displaying n images (n is an arbitrary integer of 3 or more).

  In the case of the n-screen display, each opening 154 in the barrier 150 is arranged so that one opening corresponds to n pixel dots of the transflective liquid crystal panel 110. In this way, n images formed by the transflective liquid crystal panel 110 can be optically separated.

  In the above-described embodiments, the configuration including the backlight 180 as the directional display 100 has been described as an example, but the backlight is not an essential component.

It is explanatory drawing which showed typically the cross section of the directional display display as one Example of this invention. It is explanatory drawing which expands and shows the center part of the directional display 100 shown in FIG. It is explanatory drawing for demonstrating the method of determining the gap between the light reflection layer and pixel dot in the directional display display 100 of FIG. 1, and the pitch of opening parts. It is explanatory drawing for demonstrating the method of determining the gap between the light reflection layer and pixel dot in the directional display display 100 of FIG. 1, and the pitch of opening parts. FIG. 2 is an explanatory diagram showing a specific example of the barrier 150 in FIG. 1 as viewed from the viewer side. It is explanatory drawing which showed the other specific example of the barrier 150 in FIG. 1 seeing from the viewer side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Directional display 110 ... Semi-transmission type liquid crystal panel 112 ... Polarizing plate 114 ... Phase difference plate 116 ... Glass substrate 118 ... Light reflection film 120 ... Through hole 122 ... Color filter 124 ... Counter electrode 126 ... Liquid crystal layer 128 ... Pixel electrode 130a ... Pixel dot 130b ... Pixel dot 132 ... Glass substrate 134 ... Phase difference plate 136. .. Polarizing plate 150 ... Barrier 152 ... Light shielding part 154 ... Opening part 156 ... Glass substrate 158 ... Non-reflective layer 160 ... Light reflective layer 180 ... Backlight 190a .. .First observation area 190b ... second observation area

Claims (8)

A directional display capable of simultaneously displaying a plurality of images having directivity,
A liquid crystal layer constituting a plurality of pixel dots; and a transmission / reception unit that is provided on the back side of the liquid crystal layer, reflects light incident from the front side of the liquid crystal layer, and transmits light incident from the back side of the liquid crystal layer. A liquid crystal panel for forming the plurality of images with the plurality of pixel dots,
In order to optically separate the plurality of images, a barrier having a plurality of light shielding portions and a plurality of openings, and disposed on the front side of the liquid crystal layer;
A directional display characterized by comprising: The directional display according to claim 1,
Each light-shielding portion in the barrier includes a light reflecting layer on the back side of the barrier. The directional display according to claim 1 or 2,
Each light-shielding part in the barrier includes a non-reflective layer on the front side of the barrier. The directional display according to any one of claims 1 to 3,
The liquid crystal panel comprises a front side polarizing plate disposed on the front side of the liquid crystal layer and a back side polarizing plate disposed on the back side of the liquid crystal layer,
The directional display is characterized in that the front-side polarizing plate is disposed in front of the barrier. The directional display according to any one of claims 1 to 4,
Each opening in the barrier is provided so that one opening corresponds to n pixel dots of the liquid crystal panel when the number of images to be displayed is n (n is an integer of 2 or more). A directional display characterized by that. The directional display according to any one of claims 1 to 5,
The distance when the pitch between adjacent openings in the barrier is L, and the pitch between adjacent pixel dots among the plurality of image dots forming one image in the liquid crystal panel is M. A directional display, wherein L is smaller than the distance M. The directional display according to any one of claims 1 to 6,
The directional display according to claim 1, wherein the light shielding portion and the opening in the barrier are arranged in a checkered pattern. The directional display according to any one of claims 1 to 6,
The directional display according to claim 1, wherein the light shielding portion and the opening in the barrier are arranged in a stripe shape.

Images