JP2016173418A - Image display device and storage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display device and a storage, which can achieve both the visibility of an image and the visibility of an article disposed at the depth side of the image.SOLUTION: An image display device includes a liquid crystal portion 17 disposed between a front surface 2a and a rear surface 2b, a light guide plate 30 that is disposed between the front surface 2a and the rear surface 2b and irradiates the liquid crystal portion 17 with light entering from an edge light 40 as backlight, a transmissive liquid crystal display 10 that allows light to transmit between the front surface 2a and the rear surface 2b, and a backlight blocking portion that blocks the irradiation with the backlight from a part of the liquid crystal portion 17.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an image display device and a storage.

  As this type of prior art, for example, there is one disclosed in Patent Document 1. Japanese Patent Application Laid-Open No. 2004-133830 discloses a “transparent outer protective panel, a transparent inner protective panel, a translucent digital video display device disposed between the outer protective panel and the inner protective panel, and a translucent video display device. And a light guide including a glass panel fixed to the digital display system ”. In this digital display system, there is a translucent digital video display device at the door portion of the refrigerator. This digital display system can recognize only the product in the refrigerator or display a digital image on the front of the product in the refrigerator depending on whether light is introduced into the light guide. It is characterized by high effectiveness.

Special table 2014-509528 gazette

However, as in the digital display system disclosed in Patent Document 1, when a digital image is displayed on the entire front surface of the door portion of the refrigerator, the product in the refrigerator and the digital image are visually overlapped so that the product in the refrigerator is not noticeable. There is a problem that the product visibility is low.
Accordingly, the present invention has been made in view of such circumstances, and is an image that can achieve both the visibility of an image and the visibility of an article positioned on the back side of the image as viewed from the user. An object is to provide a display device and a storage.

  In order to solve the above problem, an image display device according to one embodiment of the present invention includes a liquid crystal portion disposed between a first surface and a second surface located on the opposite side of the first surface; A light guide plate that is disposed between the first surface and the second surface and that irradiates the liquid crystal unit with incident light as a backlight; the first surface and the second surface; A transmissive liquid crystal display that can transmit light between and a backlight blocking unit that blocks irradiation of the backlight to a part of the liquid crystal unit.

  According to one aspect of the present invention, it is possible to achieve both the visibility of an image and the visibility of an article placed on the back side of the image.

It is a perspective view which shows the structural example of the refrigerator 100 which concerns on 1st Embodiment. 1 is a schematic diagram illustrating a configuration example of a transmissive liquid crystal display 10. FIG. 2 is a plan view schematically showing a light guide plate 30 and an edge light 40. FIG. FIG. 4 is a schematic diagram illustrating an arrangement example of laser dots 35 on a light guide plate 30. FIG. 6 is a diagram illustrating a relationship between a formation position of a laser dot 35 and a size of the laser dot 35. FIG. 4 is a schematic diagram illustrating an arrangement example of pixels 50 in the transmissive liquid crystal display 10. 4 is a schematic diagram illustrating an example of a display operation of the transmissive liquid crystal display 10. FIG. It is a photograph figure which shows the result of the experiment which this inventor conducted. It is a top view which shows typically the light-guide plate 130 and edge light 140 which concern on 2nd Embodiment. 3 is a block diagram illustrating a configuration example of an edge light 140. FIG. 5 is a schematic diagram illustrating an example of a display operation of the transmissive liquid crystal display 110. FIG. It is a schematic diagram which shows the structural example of the light-guide plate 230 which concerns on 3rd Embodiment. 6 is a schematic diagram illustrating an example of a display operation of the transmissive liquid crystal display 210. FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that, in each drawing described below, parts having the same configuration are denoted by the same reference numerals, and repeated description thereof is omitted.
<First Embodiment>
[Constitution]
(1) Refrigerator FIG. 1 is a perspective view illustrating a configuration example of the refrigerator 100 according to the first embodiment of the present invention.
The refrigerator 100 shown in FIG. 1 is a storage for storing and displaying arbitrary goods (for example, drinks, food, etc.) while cooling them at a preset temperature. The refrigerator 100 includes a housing 1 having a door 3 and a transmissive liquid crystal display 10 that also serves as at least a part of the door 3.

  As shown in FIG. 1, the external appearance of the housing 1 is, for example, a box shape having six surfaces. A space is provided inside the housing 1, and a shelf board (not shown) is attached so as to partition this internal space (that is, inside the refrigerator) in the vertical direction. The shelf board secures a multi-stage space for displaying products in the refrigerator. In addition, an illumination lamp (not shown) for illuminating the inside of the refrigerator is attached to the housing 1.

  The door 3 is provided on the front side of the housing 1. For example, when the door 3 is viewed from the front, a hinge (not shown) is attached to one end of the door 3 in the left-right direction so as to hold the door 3 to the housing 1 so that it can be opened and closed. Moreover, the handle part 3a for a user to hold | grip is provided in the other edge part of the left-right direction of the door 3. As shown in FIG. The handle portion 3a may protrude from the surface of the door 3 or may be recessed. The user can put in and out the goods in the refrigerator by holding the handle portion 3a and opening and closing the door 3.

  In the refrigerator 100, the transmissive liquid crystal display 10 is fitted between the handle 3a of the door 3 and the hinge. Light can be transmitted between the front surface and the back surface of the transmissive liquid crystal display 10, and products displayed in the refrigerator can be visually recognized through the transmissive liquid crystal display 10. In addition, each surface (for example, the left side surface, the right side surface, the back surface, the top surface, and the bottom surface) other than the front surface of the housing 1 is configured by, for example, a light-shielding member.

(2) Transparent Liquid Crystal Display (2.1) Laminated Structure FIG. 2 is a schematic diagram showing a configuration example of the transparent liquid crystal display 10. As shown in FIG. 2, the transmissive liquid crystal display 10 includes, for example, a first glass substrate 11, a light guide plate 30, a TFT (Thin Film Transistor) array, a liquid crystal part (liquid crystal layer) 17, and a common electrode. 19, a color filter 21, a second glass substrate 23, and an edge light 40 disposed adjacent to the end (that is, the side) of the light guide plate 30. The edge light 40 is, for example, a photodiode or a fluorescent lamp that is elongated in one direction, and is disposed in parallel to the end of the light guide plate 30. The light guide plate 30 irradiates the entire liquid crystal unit 17 with the light incident on the end from the edge light 40 as a backlight, and is made of a glass substrate, for example.

  In this transmissive liquid crystal display 10, from the back surface (lower surface in FIG. 2) 2b toward the front surface (upper surface in FIG. 2) 2a, the first glass substrate 11, the light guide plate 30, the TFT array 15, The liquid crystal part 17, the common electrode 19, the color filter 21, and the second glass substrate 23 are laminated in this order. And in the transmissive liquid crystal display 10, the light containing visible light can permeate | transmit between the front surface 2a and the back surface 2b.

  In addition, the transmissive liquid crystal display 10 may include components other than those described above. For example, the transmissive liquid crystal display 10 may include a polarizing plate or a glass substrate between the light guide plate 30 and the TFT array 15, and may include a polarizing plate on the second glass substrate 23. The polarizing plate is a plate that allows only light polarized or polarized in a specific direction to pass therethrough. Further, the transmissive liquid crystal display 10 may include an alignment film between the TFT array 15 and the liquid crystal part 17 or between the liquid crystal part 17 and the common electrode 19. The alignment film is a polymer film for uniformly discarding liquid crystal molecules. Also in this case, light including visible light can be transmitted between the front surface 2a and the back surface 2b.

The transmissive liquid crystal display 10 does not have a diffusion plate. Here, the diffusion plate is a ground glass plate disposed for the purpose of diffusing light emitted from the light guide plate and eliminating unevenness. In the transmissive liquid crystal display 10, the light passing between the front surface 2 a and the back surface 2 b is prevented from diffusing by not providing the diffusion plate.
In FIG. 2, each of the first glass substrate 11, the light guide plate 30, the TFT array 15, the liquid crystal unit 17, the common electrode 19, the color filter 21, and the second glass substrate 23 is provided. Although a gap is described, this is a gap that is described in order to clarify the stacking order of each component. In the actual transmissive liquid crystal display 10, it is preferable that these gaps do not exist and adjacent constituent parts are in close contact with each other.

(2.2) Light Guide Plate and Edge Light FIG. 3 is a plan view schematically showing the light guide plate 30 and the edge light 40. As shown in FIG. 3, the shape of the light guide plate 30 in a plan view is, for example, a rectangle, and includes a first end 30 a and a second end 30 b that faces the first end 30 a in a plan view. The edge light 40 is disposed along the first end 30a. With such an arrangement, the light emitted from the edge light 40 enters the first end 30a of the light guide plate 30 and propagates from the first end 30a to the second end 30b. It has become. The light guide plate 30 has a laser dot region 31 in which a plurality of laser dots are formed, and a non-laser dot region 32 in which no laser dots are formed. Here, the laser dot is a recess formed by irradiating the surface of the light guide plate 30 (that is, the surface facing the liquid crystal part) with laser light. The laser dots are formed for the purpose of reflecting the light incident on the light guide plate.

  Of the light that has entered the first end 30 a of the light guide plate 30, the light that passes through the laser dot region 31 is reflected by the laser dots and emitted from the light guide plate 30. The emitted light is applied as a backlight to a portion of the liquid crystal unit 17 that faces the laser dot region 31. For this reason, the laser dot region 31 functions as a backlight irradiation unit that irradiates the liquid crystal unit 17 with a backlight.

  On the other hand, of the light that has entered the first end 30a of the light guide plate 30, the light that passes through the non-laser dot region 32 is not reflected by the laser dot (strictly, some light is emitted. It is weak enough to be used as a backlight and is negligible). Light passing through the non-laser dot region 32 propagates to the second end 30b with almost no attenuation. Then, a part of the light propagated to the second end 30b is emitted from the second end 30b to the outside of the light guide plate 30, and the other part is reflected by the second end 30b and reflected by the light guide plate. Propagate further through 30. Thus, the non-laser dot region 32 does not irradiate light outside the light guide plate 30. For this reason, the non-laser dot region 32 functions as a backlight blocking unit that blocks backlight irradiation to the liquid crystal unit 17.

(2.3) Arrangement Interval of Laser Dots FIG. 4 is a schematic diagram showing an arrangement example of the laser dots 35 on the light guide plate 30. As shown in FIG. 4, in the laser dot region 31, the laser dots 35 are arranged at a constant interval y in the vertical direction and at a constant interval x in the horizontal direction in plan view, and a plurality of rows A <b> 1. , A2, ..., A6, A7, ... and a plurality of columns B1, B2, ..., B6, B7, ... are formed. Further, as shown in FIG. 4, in this example, even rows (An; n is an even number of 2 or more) of a plurality of rows are half-pitch in the horizontal direction with respect to odd rows (An-1) ( That is, they are arranged with a deviation of x / 2. Even columns (Bn; n is an even number of 2 or more) of the plurality of columns are arranged with a half-pitch (ie, y / 2) shift in the vertical direction with respect to the odd columns (Bn−1).

(2.4) Size of Laser Dot FIG. 5 is a diagram showing the relationship between the formation position of the laser dot 35 and the size of the laser dot 35. The horizontal axis in FIG. 5 indicates the distance in the horizontal direction from the first end 30a. The number “0” on the horizontal axis indicates the position of the first end 30a, the number “1” on the horizontal axis indicates the position of the second end 30b, and the number “0.5” on the horizontal axis indicates the first position. An intermediate (middle) position between the end 30a and the second end 30b is shown. The vertical axis in FIG. 5 indicates the size of the laser dot 35. Each number on the vertical axis indicates the ratio of the size of the laser dot 35 at each position when the size of the laser dot 35 at the first end 30a is “1”.

As shown in FIG. 5, in the laser dot region 31, the size (that is, the diameter) of the laser dot 35 is minimum at the first end 30a. In addition, the size of the laser dot 35 gradually increases as the formation position approaches the second end 30b from the first end 30a, and the size of the laser dot 35 increases between the first end 30a and the second end 30b. It is the maximum at the position A closer to the second end 30b than the middle. Here, the position A is, for example, a distance of 0.85 from the first end 30a, where 1 is the distance from the first end 30a to the second end 30b.
Further, the size of the laser dot 35 gradually decreases as the formation position approaches the second end 30b from the position A. The size of the laser dot 35 at the second end 30b is about twice the size of the laser dot 35 at the first end 30a.

(2.5) Relationship between laser dot arrangement interval and resolution In the first embodiment and the second and third embodiments described later, the interval between laser dots 35 in the laser dot region 31 (that is, adjacent dots). A distance is provided between the center of the transmissive liquid crystal display 10 and the resolution thereof. In other words, a correlation is provided between the interval between the laser dots 35 and the interval between pixels (that is, the distance between the centers of adjacent pixels).

  FIG. 6 is a schematic diagram illustrating an arrangement example of the pixels 50 in the transmissive liquid crystal display 10. As shown in FIG. 6, in the transmissive liquid crystal display 10, for example, one pixel is configured by three primary colors of R: red, G: green, and B: blue. Each pixel has a square shape in plan view, and adjacent pixels are arranged adjacent to each other without a gap. Thus, the interval between the pixels has the same value as the length z of one side of each pixel.

  Here, the interval between the laser dots 35 is 1.5 times or more and less than 2.0 times the interval between the pixels 50. Explaining in the vertical direction and the horizontal direction, the vertical interval x between the laser dots 35 is 1.5 times or more and less than 2.0 times the vertical interval z between the pixels 50. Similarly, the horizontal interval y between the laser dots 35 is 1.5 times or more and less than 2.0 times the horizontal interval z of the pixels.

  The numerical value is illustrated about this space | interval. When the transmissive liquid crystal display 10 is a 42-inch FHD (full high-definition) and the number of pixels (pixels) is vertical x horizontal = 1920 x 1080, the size of one pixel 50 including the three primary colors of RGB is vertical X width = 0.4833 mm x 0.4833 mm. Here, the vertical interval x of the laser dots 35 is 0.85 mm on average, and the horizontal interval y is also 0.85 mm on average, which is 1.76 times the interval of the pixels 50.

[Display operation]
Next, the display operation of the transmissive liquid crystal display 10 according to the first embodiment will be described. 7A to 7C are schematic diagrams illustrating an example of the display operation of the transmissive liquid crystal display 10. Specifically, FIG. 7A shows a state in which no light is incident on the light guide plate 30 of the transmissive liquid crystal display 10 (that is, the backlight is off) and the image 9 is not displayed. It is. FIG. 7B is a diagram illustrating a state where light is incident on the light guide plate 30 of the transmissive liquid crystal display 10 (that is, the backlight is on) and no image is displayed. FIG. 7C is a diagram illustrating a state in which the backlight is on and the image 9 is displayed.

(1) When the backlight is off Since the backlight is off in FIG. 7A, the user can set the refrigerator through the transmissive liquid crystal display 10 in both the laser dot region 31 and the non-laser dot region 32. The product 7 (for example, beer) can be viewed with high visibility. Even if the image is displayed in the state of FIG. 7A, the image is not noticeable when the backlight is off. For this reason, even when an image is displayed, the user can view the product 7 in the refrigerator with high visibility through the transmissive liquid crystal display 10 in the same manner as when the image is not displayed. Examples of the image 9 include a large and small logo of the product 7, a name and a nickname of the product 7, and the like. The image 9 may be a still image or a moving image.

(2) When the backlight is on In FIG. 7B, the laser dot region 31 is brightly illuminated by the backlight. For this reason, compared with the state of Fig.7 (a), in the laser dot area | region 31, the goods 7 in a refrigerator become difficult to see. On the other hand, in the non-laser dot region 32, the backlight is blocked. For this reason, in the non-laser dot region 32, the product 7 in the refrigerator can be viewed with high visibility through the transmissive liquid crystal display 10. Thus, in the state of FIG. 7B, the product 7 of the refrigerator 100 becomes difficult to see in the laser dot region 31. On the other hand, in the non-laser dot region 32, the product 7 in the refrigerator can be viewed with high visibility as in the case of FIG.

  In FIG. 7C, the laser dot region 31 is brightly illuminated by the backlight, and the image 9 is displayed. For this reason, the user can visually observe the image 9 and the product 7 in the refrigerator in the laser dot region 31. On the other hand, in the non-laser dot region 32, the backlight is blocked. For this reason, in the non-laser dot region 32, the product 7 in the refrigerator can be viewed with high visibility through the transmissive liquid crystal display 10.

  Thus, in the state of FIG. 7C, the user can visually observe the image 9 and the product 7 of the refrigerator 100 in the laser dot region 31. Moreover, in the non-laser dot area | region 32, the goods 7 in a refrigerator can be visually observed with high visibility similarly to the case of Fig.7 (a) and (b).

(3) Illumination in the refrigerator In FIGS. 7A to 7C, the illumination lamp in the refrigerator may be ON. As a result, the product 7 displayed in the refrigerator is illuminated by the illumination lamp, and the light reflected by the product 7 goes out through the transmissive liquid crystal display 10 (ie, the front side). Therefore, the user can view the product 7 in the refrigerator more clearly.

[Correspondence]
In the first embodiment, one of the front surface 2a and the back surface 2b corresponds to the “first surface” of the present invention, and the other corresponds to the “second surface” of the present invention. The laser dot 35 corresponds to the “concave portion” of the present invention. Further, the laser dot region 31 corresponds to the “first region” of the present invention, and the non-laser dot region 32 corresponds to the “second region” of the present invention. The first end 30a corresponds to the “end” of the present invention, and the edge light 40 corresponds to the “light source” of the present invention. The door having the transmissive liquid crystal display 10 corresponds to the “image display device” of the present invention, and the refrigerator 100 corresponds to the “storage” of the present invention.

[Effect of the first embodiment]
The first embodiment of the present invention has the following effects.
(1) As shown in FIG. 3, the light guide plate 30 includes a laser dot region 31 in which the laser dots 35 are formed and a non-laser dot region 32 in which the laser dots 35 are not formed. In the laser dot region 31, the light is reflected by the laser dot 35, and the portion of the liquid crystal unit 17 facing the laser dot region 31 is irradiated with the reflected light as a backlight. On the other hand, since no laser dot 35 is formed in the non-laser dot region 32, no reflected light is generated. For this reason, the non-laser dot region 32 functions as a backlight blocking unit that blocks backlight irradiation with respect to a part of the liquid crystal unit 17 (that is, a portion facing the non-laser dot region 32).

  Thereby, the user can visually check the product 7 with high visibility since the image 9 and the product 7 can be visually observed in the laser dot region 31 and the backlight is blocked in the non-laser dot region 32. Can do. Therefore, both the visibility of the image 9 displayed in the laser dot region 31 and the visibility of the product 7 located on the back side of the image 9 can be achieved.

(2) Further, as shown in FIG. 4, in the laser dot region 31, the interval between the laser dots 35 is constant (that is, the laser dots 35 are uniformly distributed) and exists between the laser dots 35. The region where the laser dots 35 are not present is also distributed uniformly. As a result, the intensity distribution in the display surface is biased (excessive light emission or reduced light emission) with respect to outside light or illumination light that enters or exits the refrigerator through the area where the laser dots 35 are not present. Can be prevented. Therefore, the visibility of the product 7 located on the back side of the image 9 can be further enhanced.

(3) In the laser dot region 31, the interval between the laser dots 35 is 1.5 times or more and less than 2.0 times, more preferably 1.7 times or more and less than 1.8 times the interval between the pixels 50. It is the size of. Thereby, generation | occurrence | production of a moire (interference fringe) can be reduced. In addition, although the mechanism which can reduce moire is unknown, this inventor has confirmed the effect of moire reduction by experimenting.

  8A to 8D are photographic diagrams showing the results of experiments conducted by the present inventors. FIG. 8A is a photograph showing the display surface when the interval between the laser dots 35 is 1.76 times the interval between the pixels 50. FIG. 8B is a photograph showing the display surface when the interval between the laser dots 35 is 1.5 times the interval between the pixels 50 (interval: small). FIG. 8C is a photograph showing the display surface when the interval between the laser dots 35 is 1.3 times the interval between the pixels 50 (interval: minimum). FIG. 8D is a photograph showing the display surface when the interval between the laser dots 35 is 2.0 times the interval between the pixels 50 (interval: large). As can be seen from the photograph diagrams of FIGS. 8 (a) to 8 (d), no moire occurs in FIG. 8 (a), whereas moire occurs in FIGS. 8 (b) to 8 (d). Yes. However, when the interval between the laser dots 35 is 1.5 times the interval between the pixels 50 (interval: small), and when the interval between the laser dots 35 is 2.0 times (interval: large), the moiré that occurs is small, so the display is performed. Depending on the image, I don't care about moire.

(4) Also, as shown in FIG. 5, in the laser dot region 31, the size of each laser dot 35 is gradually increased as the formation position approaches the second end 30b from the first end 30a. Becomes larger at the position A closer to the second end than the middle between the first end 30a and the second end 30b, and gradually decreases from the position A toward the second end 30b. ing. Considering not only the attenuation depending on the distance of the light incident from the first end 30b but also the reflection of the light at the second end 30b, the laser is not at the second end 30b but at the position A. The size of the dot 35 is maximized. As a result, the intensity of the reflected light emitted from the laser dot region 31 can be made close to uniform within the plane of the laser dot region 31.

[Modification]
(1) In the first embodiment, the case where the laser dots 35 are formed of concave portions has been described. However, the laser dots 35 may be convex portions instead of concave portions. Even in such a case, the same effects as the effects (1) to (4) of the first embodiment are obtained.
(2) Moreover, the uneven | corrugated | grooved part of this invention does not need to be formed with the laser. That is, the concavo-convex portion is not limited to the laser dot 35, and may be formed by another forming method. As another forming method, for example, there is a method of pressing a mold having unevenness against a smooth light guide plate (material) to form the unevenness. As another forming method, for example, there is a method in which a smooth light guide plate (material) is provided with a resist pattern for sandblasting having a shape that becomes a recess, and the unevenness is formed by sandblasting. Moreover, this uneven | corrugated | grooved part may be mixed with the recessed part and the convex part. Even in such a case, the same effects as the effects (1) to (4) of the first embodiment are obtained.

(3) Moreover, in said 1st Embodiment, the non-laser dot area | region 32 was illustrated as a 2nd area | region of this invention. Further, it has been described that the laser dot 35 is not formed in the non-laser dot region 32. However, the present invention is not limited to the case where no laser dot 35 is formed in the non-laser dot region 32. That is, fewer laser dots 35 may exist in the non-laser dot region 32 than in the laser dot region 31. Even in such a case, when the number of laser dots 35 in the non-laser dot region 32 is sufficiently small and the reflected light is sufficiently small, the effects (1) to (4) of the first embodiment described above. ) Has the same effect.

Second Embodiment
In the first embodiment described above, the case where the non-laser dot region 32 of the light guide plate 30 functions as a backlight blocking unit that blocks backlight irradiation to the liquid crystal unit 17 has been described. However, in the present invention, the backlight blocking portion is not limited to the non-laser dot region 32. For example, a part of the edge light that is partially turned off may function as a backlight blocking unit. In the second embodiment, such an aspect will be described.

[Constitution]
FIG. 9 is a plan view schematically showing the light guide plate 130 and the edge light 140 according to the second embodiment. As shown in FIG. 9, the shape of the light guide plate 130 in a plan view is, for example, a rectangle, and includes a first end portion 130 a and a second end portion 130 b that faces the first end portion 130 a in a plan view. A plurality of laser dots are formed on the light guide plate 130 as a whole, and all regions are laser dot regions in plan view. The edge light 140 includes first to fourth edge lights 141 to 144 arranged adjacent to the first end portion 130a. Each of the first to fourth edge lights 141 to 144 emits light independently of each other and can be turned off. The light emitted by the first to fourth edge lights 141 to 144 is incident on the first end portion 130a facing the first to fourth edge lights 141 to 144, respectively. It propagates toward the end portion 130b.

  Hereinafter, in the light guide plate 130, a region where light from the first edge light 141 enters is referred to as a first light guide region 131, and a region where light from the second edge light 142 enters the second light guide plate 130. The region where the light from the third edge light 143 enters is referred to as a third light guide region 133, and the region where the light from the fourth edge light 144 enters the fourth. Is referred to as a light guide region 134.

FIG. 10 is a block diagram illustrating a configuration example of the edge light 140. As illustrated in FIG. 10, the edge light 140 includes a power supply selection unit 150, first to fourth drive units 151 to 154 connected to the power supply selection unit 150, and first to fourth drive units 151 to 151. 154 have first to fourth edge lights 141 to 144 connected thereto.
The power supply selection unit 150 has a function of selecting an arbitrary drive unit from the first to fourth drive units 151 to 154. For example, the power supply selection unit 150 is connected to an image generation unit (not shown) of the transmissive liquid crystal display 10. The image generation unit selects a region for displaying an image from among the first to fourth light guide regions 131 to 134, and transmits information about the selected region to the power source selection unit 150. The power source selection unit 150 receives the information transmitted from the image generation unit, selects and selects an arbitrary driving unit from the first to fourth driving units 151 to 154 based on the received signal. A control signal is transmitted to the drive unit.

  The first to fourth drive units 151 to 154 have a function of driving the first to fourth edge lights 144 based on a control signal from the power supply selection unit 150. For example, only the driving unit selected by the power source selection unit 150 among the first to fourth driving units 151 to 154 supplies power to the edge light 140 connected to the driving unit. As a result, the first to fourth edge lights 144 can emit light and extinguish independently of each other.

  When the first driving unit 151 supplies power to the first edge light 141, the first edge light 141 emits light. Then, the light from the first edge light 141 enters the first light guide region 131 and is reflected by the laser dots formed in the first light guide region 131. Then, this reflected light is irradiated as a backlight to a portion facing the first light guide region 131 in the liquid crystal portion.

  Similarly, when the second driving unit 152 supplies power to the second edge light 142, the second edge light 142 emits light. Then, the light from the second edge light 142 enters the second light guide region 132 and is reflected by the laser dots formed in the second light guide region 132. Then, this reflected light is applied as a backlight to a portion of the liquid crystal portion that faces the second light guide region 132. The third driving unit 153 and the third edge light 143, and the fourth driving unit 154 and the fourth edge light 144 can irradiate the liquid crystal unit with the backlight in the same manner.

[Display operation]
Next, the display operation of the transmissive liquid crystal display 110 according to the second embodiment will be described. FIGS. 11A to 11C are schematic diagrams illustrating an example of the display operation of the transmissive liquid crystal display 110. Specifically, FIG. 11A shows a state in which no light enters the first to fourth light guide regions 131 to 134 (that is, all the backlights are off) and no image is displayed. Is shown. FIG. 11B shows that light enters the first to fourth light guide regions 131 to 134 (that is, all the backlights are on), and the first to fourth light guide regions. 131 to 134 show a state in which an image 9 is displayed. FIG. 11 (c) shows that light is incident only on the second and fourth light guide regions 132 and 134 (that is, the backlight is partially on), and the second and fourth light guide regions. The state where the image 9 is displayed in the light areas 132 and 134 is shown.

  In FIG. 11A, since all the backlights are turned off, the user visually recognizes the product 7 in the refrigerator through the transmissive liquid crystal display 110 in all of the first to fourth light guide regions 131 to 134. Highly visible. In FIG. 11B, the first to fourth light guide regions 131 to 134 are brightly illuminated by the backlight, and the image 9 is displayed. For this reason, the user can superimpose the image 9 and the product 7 in the refrigerator on the first to fourth light guide regions 131 to 134 and visually check them.

  In FIG. 11C, the second and fourth light guide regions 132 and 134 are brightly illuminated by the backlight, and the image 9 is displayed. For this reason, the user can visually observe the image 9 and the product 7 in the refrigerator in the second and fourth light guide regions 132 and 134 in an overlapping manner. Further, the backlight is blocked in the first and third light guide regions 131 and 133. For this reason, in the 1st, 3rd light guide area | regions 131 and 133, the goods 7 in a refrigerator can be visually observed through the transmissive liquid crystal display 110 with high visibility. In particular, when no image is displayed in the first and third light guide regions 131 and 133, the product 7 in the refrigerator can be visually observed more clearly.

In addition, in Fig.11 (a)-(c), the illumination lamp in a refrigerator may be set to ON. As a result, the product 7 displayed in the refrigerator is illuminated by the illumination lamp, and the light reflected by the product 7 goes out through the transmissive liquid crystal display 10 (ie, the front side). Therefore, the user can view the product 7 in the refrigerator more clearly.
Moreover, especially in 2nd Embodiment and 3rd Embodiment mentioned later, it is preferable that arrangement | positioning of the shelf board in a refrigerator respond | corresponds to the 1st-4th light guide area | region. Thereby, for example, as shown in FIGS. 11B and 11C, the products 7 arranged on each shelf and the images (for example, characters such as Beer) displayed on the first to fourth light guide regions. Can be overlapped with good consistency, and an effect of further improving the sales promotion effect of the product 7 arranged on each shelf can be expected.

[Correspondence]
In the second embodiment, the first end portion 130a corresponds to the “end portion” of the present invention, and the edge light 140 corresponds to the “light source” of the present invention. The door having the transmissive liquid crystal display 110 corresponds to the “image display device” of the present invention. Other correspondences are the same as in the first embodiment.

[Effects of Second Embodiment]
The second embodiment of the present invention has the same effects as the effects (2) to (4) of the first embodiment.
Further, the first to fourth edge lights 141 to 144 can independently emit light and extinguish. As a result, any of the first to fourth edge lights 141 to 144 is
It functions as a backlight blocking unit that blocks backlight irradiation by turning off other light emitting edge lights.

  That is, the first edge light 141 functions as a backlight blocking unit for the first light guide region 131. The second edge light 142 functions as a backlight blocking unit for the second light guide region 132. The third edge light 143 functions as a backlight blocking unit for the third light guide region 133. The fourth edge light 144 functions as a backlight blocking unit for the fourth light guide region 134.

Thereby, the user can superimpose the image 9 and the product 7 in the region where the backlight is lit among the first to fourth light guide regions 141 to 144, and the backlight is shut off. The product 7 can be viewed with high visibility in the area where the image is displayed. Therefore, both the visibility of the image 9 and the visibility of the product 7 located on the back side of the image 9 can be achieved.
[Modification]
Also in the second embodiment, the modifications (1) and (2) described in the first embodiment may be applied. Also in this case, the same effects as those of the modifications (1) and (2) of the first embodiment are obtained.

<Third Embodiment>
In the present invention, the first embodiment and the second embodiment described above may be combined. In the third embodiment, such an aspect will be described.
[Constitution]
FIG. 12 is a schematic diagram illustrating a configuration example of the light guide plate 230 according to the third embodiment of the present invention. As shown in FIG. 12, the light guide plate 230 includes a first light guide region 231 where light from the first edge light 141 enters and a second light where light from the second edge light 142 enters. A light guide region 232, a third light guide region 233 into which light from the third edge light 143 enters, and a fourth light guide region 234 into which light from the fourth edge light 144 enters. Have Further, each of the first to fourth light guide regions 231 to 234 has a laser dot region 31 and a non-laser dot region 32. For example, in each of the first to fourth light guide regions 231 to 234, the first end portion 230a side is the laser dot region 31, and the second end portion 230b side is the non-laser dot region 32. .

[Display operation]
Next, the display operation of the transmissive liquid crystal display 210 according to the third embodiment will be described. 13A to 13C are schematic diagrams illustrating an example of the display operation of the transmissive liquid crystal display 210. FIG. Specifically, FIG. 13A shows a state in which no light enters the first to fourth light guide regions 231 to 234 (that is, all the backlights are off) and no image is displayed. Is shown. FIG. 11B shows that light enters the first to fourth light guide regions 231 to 234 (that is, all the backlights are on), and the first to fourth light guide regions. The state which is displaying the image 9 in each laser dot area | region 31 of 231-234 is shown. FIG. 11 (c) shows that light is incident only on the second and fourth light guide regions 232 and 234 (that is, the backlight is partially on), and the second and fourth light guide regions. The state where the image 9 is displayed in each laser dot region 31 of the light regions 232 and 234 is shown.

Since the backlight is turned off in FIG. 13A, the user can view the product 7 in the refrigerator through the transmissive liquid crystal display 210 in all of the first to fourth light guide regions 231 to 234. Highly visible.
In FIG. 13B, the laser dot regions 31 of the first to fourth light guide regions 231 to 234 are brightly illuminated by the backlight, and the image 9 is displayed. For this reason, the user can visually observe the image 9 and the product 7 in the refrigerator in the laser dot regions 31. Further, the backlight is off in the non-laser dot regions 32 of the first to fourth regions 231 to 234. For this reason, the user can view the product 7 in the refrigerator with high visibility through the transmissive liquid crystal display 210 in these non-laser dot regions 32.

In FIG. 13C, the laser dot regions 31 of the second and third light guide regions 232 and 233 are brightly illuminated by the backlight, and the image 9 is displayed. For this reason, the user can superimpose the image 9 and the product 7 in the refrigerator with these laser dot regions 31 and visually observe them. On the other hand, the backlight is blocked in the non-laser dot region 32 of the second and third light guide regions 232 and 233 and the first and fourth light guide regions 231 and 234. Therefore, the user can view the product 7 in the refrigerator with high visibility through the transmissive liquid crystal display 210 in the area where the backlight is blocked. In particular, when there is no image display in the area where the backlight is blocked, the product 7 in the refrigerator can be seen more clearly.
In addition, in Fig.13 (a)-(c), the illumination lamp in a refrigerator may be set to ON. As a result, the product 7 displayed in the refrigerator is illuminated by the illumination lamp, and the light reflected by the product 7 goes out through the transmissive liquid crystal display 10 (ie, the front side). Therefore, the user can view the product 7 in the refrigerator more clearly.

[Correspondence]
In the third embodiment, the first end 230a corresponds to the “end” of the present invention, and the edge light 140 corresponds to the “light source” of the present invention. The door having the transmissive liquid crystal display 210 corresponds to the “image display device” of the present invention. Other correspondences are the same as in the first embodiment.
[Effect of the third embodiment]
The third embodiment has the same effects as the effects (1) to (4) of the first embodiment and the effects of the second embodiment.

<Others>
The present invention is not limited to the above-described embodiments and modifications thereof. Based on the knowledge of those skilled in the art, design changes and the like may be added to each embodiment and its modifications, and each embodiment and its modifications may be arbitrarily combined, and such changes were made. Embodiments are also included in the technical scope of the present invention.

  The image display device and the storage of the present invention can be suitably used for a refrigerator that displays products while refrigerated, or a storage other than the refrigerator (for example, a display that displays products at room temperature). Further, the image display device of the present invention can be used in a place other than a storage, for example, a store that sells products, a door or window of a train, and the like.

DESCRIPTION OF SYMBOLS 1 Housing 2a Front 2b Rear 3 Door 3a Handle part 7 Goods 9 Image 10, 110, 210 Transparent liquid crystal display 11 Glass substrate 15 TFT array 17 Liquid crystal part 19 Common electrode 21 Color filter 23 Glass substrate 30, 130, 230 Light guide plate 30a , 130a, 230a First end 30b, 130b, 230b Second end 31 Laser dot region 32 Non-laser dot region 35 Laser dot 40, 140 Edge light 50 Pixel 100 Refrigerator 131, 231 First light guide region 132 232 Second light guide region 133, 233 Third light guide region 134, 234 Fourth light guide region 141 First edge light 142 Second edge light 143 Third edge light 144 Fourth edge light 151 First driving unit 152 Second driving unit 153 Third driving unit 1 54 4th drive part

Claims (6)

A liquid crystal unit disposed between a first surface and a second surface located on the opposite side of the first surface; and disposed between the first surface and the second surface; A transmissive liquid crystal display having a light guide plate for irradiating the liquid crystal unit with light to be emitted as a backlight, and capable of transmitting light between the first surface and the second surface;
An image display device comprising: a backlight blocking unit configured to block irradiation of the backlight to a part of the liquid crystal unit. The light guide plate is
A first region in which a plurality of concave and convex portions including at least one of a concave portion or a convex portion is formed;
A second region having a number per unit area of the concavo-convex portion less than the first region;
The image display apparatus according to claim 1, wherein the second region functions as the backlight blocking unit.   The image display apparatus according to claim 2, wherein the uneven portion is not formed in the second region.   4. The image display device according to claim 2, wherein each of the plurality of uneven portions is a laser dot formed by irradiating the light guide plate with laser light. A light source disposed adjacent to an end of the light guide plate;
The image display device according to any one of claims 1 to 4, wherein a part of the light source that is partially turned off functions as the backlight blocking unit. An image display device according to any one of claims 1 to 5,
A housing having a door,
The storage, wherein the image display device also serves as at least a part of the door.