JP2002372608A - Optical part and reflection plate and instrument using the optical part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reflective liquid crystal display device without color blurring by preventing color mixing of reflected light in the reflective liquid crystal display device equipped with a reflection plate. SOLUTION: The reflection plate consists of a substrate, a reflection layer disposed on the substrate and a color filter. The reflection layer is provided with a plurality of unit reflection regions having first reflection surfaces reflecting light to a specified direction. The reflection plate is constructed by defining inclined angles of the first reflection surfaces so as to have light incident on the first reflection surfaces passing through pixels of a specified color of the color filter reflected by the first reflection surfaces and pass through pixels with the same color as that of the pixels through which the light incident on the color filter has passed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical component and a reflector for reflecting incident light in a predetermined direction, an apparatus using the optical component, and a light reflection method for reflecting incident light in a predetermined direction.

[0002]

2. Description of the Related Art In recent years, applications of liquid crystal display devices to personal computers, televisions, word processors, videos and the like have been developed. On the other hand, for such electronic devices, the liquid crystal image is reflected by reflecting the light incident from outside without using a backlight in order to further enhance the functions and reduce the size, power consumption and cost. There is a demand for a reflective liquid crystal display device for displaying.

[0003] In such a reflection type liquid crystal display device, since no backlight is used, it is required that the liquid crystal display surface be illuminated from behind by efficiently using externally incident light.

As shown in FIG. 9A, a reflection type liquid crystal display device 50 has a configuration in which a liquid crystal layer 54 is sandwiched between a reflection plate 51 and an upper substrate 52, and the reflection plate 51 is disposed on a lower substrate 53. And a reflection film 56. The incident light 58 incident on the reflection type liquid crystal display device 50 is divided into a first reflection light 59 reflected by the reflection film 56 and a second reflection light 60 reflected by the upper surface of the upper substrate 52. 59
If the reflection direction of the second reflected light 60 is the same as that of the second reflected light 60, the light source is visually recognized overlapping with the image of the liquid crystal display device, and there is a problem that the image is difficult to see and the visibility is reduced.

For this purpose, as shown in FIG. 9B, a pattern composed of a large number of projections 57 is arranged on the surface of the reflection film 56, and incident light is scattered by each projection 57 as shown in FIG. 9C. One that reflects light has been proposed. Convex part 57
When the light incident on the reflective film 56 is scattered by the light source, the liquid crystal screen can be illuminated with light of the scattered light 61 directed in a direction different from that of the second reflected light 60. Thus, the liquid crystal screen can be viewed from a direction that does not overlap, and the visibility is improved.

However, since the scattered light 61 scatters the incident light 58, the incident light 58 is also reflected in a direction not used for viewing the liquid crystal screen or in the same direction as the second reflected light 60. The usage efficiency becomes poor. Further, when a color filter is further disposed inside the reflective liquid crystal display device 50 to obtain a color image, the scattered light 61
There is a problem that pixels of a color different from the color filter pixels through which the incident light 58 has passed also pass through, and color mixture occurs in the viewed image.

[0007]

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to prevent color mixing of reflected light in an optical component having a reflecting surface. Another object of the present invention is to increase the efficiency of using reflected light in an optical component and a reflecting plate having a reflecting surface. Another object of the present invention is to provide a reflective liquid crystal display device using the optical component and an electronic device equipped with the reflective liquid crystal display device with high contrast and a clear image.

[0008]

An optical component according to the present invention comprises a substrate, a reflective layer disposed on the substrate, and a color filter, and the reflective layer reflects light in a predetermined direction. A plurality of unit reflection areas having a first reflection surface,
Incident light that has entered the first reflection surface through a pixel of a predetermined color of the color filter is reflected by the first reflection surface,
The tilt angle of the first reflection surface is determined so that the color filter passes through pixels of the same color as the color through which the incident light passes. According to this optical device, since the incident light and the reflected light pass through the pixels of the same color of the color filter, it is possible to obtain reflected light without color mixture.

A liquid crystal display device according to the present invention comprises: a substrate;
A reflective layer disposed on the substrate, a liquid crystal layer disposed on the opposite side of the reflective layer from the substrate, and a color filter disposed on the opposite side of the substrate of the reflective layer, The reflection layer has a plurality of unit reflection areas each having a first reflection surface that reflects light in a predetermined direction, and passes through the liquid crystal layer and a pixel of a predetermined color of the color filter and is incident on the first reflection surface. The reflected light is reflected by the first reflection surface, and the inclination angle of the first reflection surface is determined so that the light passes through a pixel of the same color as the color of the color filter through which the incident light passes. And According to this liquid crystal display device, since the incident light and the reflected light pass through the pixels of the same color of the color filter, a clear color image without color mixture can be visually recognized.

The unit reflection area includes a second reflection surface for reflecting light in a direction different from the first reflection surface, and
Light incident on the reflecting surface through the color filter,
The angle of inclination of the first reflection surface and the second reflection surface is adjusted so that the light is reflected by the second reflection surface and subsequently reflected by the first reflection surface, and then passes through the color filter and exits to the outside. May be determined. By determining the inclination angle between the first reflection surface and the second reflection surface in this manner, unnecessary reflected light does not become stray light and color mixing does not occur.

[0011] The first reflection surface and the second reflection surface may be arranged so as to be adjacent to each other via a connecting portion. The direction of the reflected light can be continuously controlled through the connecting portion. In addition, it is possible to obtain a reflective surface having a uniform surface.

The area of the first reflecting surface may be larger than the area of the second reflecting surface, and the angle of inclination of the first reflecting surface may be smaller than the angle of inclination of the second reflecting surface. By defining the first reflecting surface and the second reflecting surface in this way,
A large amount of reflected light can be emitted to an effective area. In particular, when used in a reflection type liquid crystal display device, a large amount of reflected light related to visual recognition of an image can be obtained, and light use efficiency can be improved.

When the inclination angle of the first reflection surface is α and the inclination angle of the second reflection surface is β, the inclination angle may be determined so as to satisfy a condition of 2α + 2β> 140 °. By determining the inclination angle between the first reflection surface and the second reflection surface in this manner, unnecessary reflected light does not become stray light and color mixing does not occur.

The light incident on the reflection layer is reflected by the first reflection surface, is emitted to the outside of the optical member, and is provided with another first light.
The unit reflection area may be arranged on the substrate so as to intersect with light reflected by the reflection surface and emitted outside to form a common emission area. By defining the unit reflection area in this manner, the light use efficiency of the reflected light can be increased. In particular, when used in a reflection type liquid crystal display device, an image having a small luminance distribution on the display surface can be obtained.

[0015] A reflector according to the present invention comprises a substrate and a reflective layer disposed on the substrate, wherein the reflective layer has a first reflective surface for reflecting light in a predetermined direction, and a first reflective surface. A plurality of unit reflection regions each including a second reflection surface that reflects light in a direction different from the surface, and reflected light reflected by the first reflection surface is reflected by a first reflection surface of another unit reflection region. Intersects with the reflected light to form a common emission area, and the reflected light reflected by the second reflecting surface is reflected by the first reflecting surface disposed adjacent to the second reflecting surface via a connecting portion. The light is reflected and emitted in a direction different from the emission area. According to this reflector, reflected light can be condensed in a necessary direction to improve light use efficiency, and further, reflected light reflected in an unnecessary direction can be prevented from becoming stray light.

An electronic apparatus according to the present invention includes a liquid crystal display device in an image display section, wherein the liquid crystal display device has a substrate, a reflective layer disposed on the substrate, and a substrate opposite to the reflective layer. A liquid crystal layer arranged on the side, and a color filter arranged on the opposite side of the substrate of the reflective layer,
The reflection layer has a plurality of unit reflection areas each having a first reflection surface that reflects light in a predetermined direction, and passes through the liquid crystal layer and a pixel of a predetermined color of the color filter to the first reflection surface. The incident angle of the first reflection surface is determined such that the incident light is reflected by the first reflection surface and passes through a pixel of the same color as the color through which the incident light of the color filter passes. Features. According to this electronic device, since the incident light and the reflected light pass through the pixels of the same color of the color filter, a clear color image without color mixture can be visually recognized.

The unit reflection area includes a second reflection surface for reflecting light in a direction different from the first reflection surface, and
Light incident on the reflecting surface through the color filter,
The angle of inclination of the first reflection surface and the second reflection surface is adjusted so that the light is reflected by the second reflection surface and subsequently reflected by the first reflection surface, and then passes through the color filter and exits to the outside. May be determined. By determining the inclination angle between the first reflection surface and the second reflection surface in this manner, unnecessary reflected light does not become stray light and color mixing does not occur.

According to the light reflection method of the present invention, the incident light that has passed through the color filter and the first reflected light that has passed through the color filter and reflected by the first reflection surface and that has exited the incident light can be obtained. , Through the same color pixel of the color filter. According to this light reflection method, since the incident light and the reflected light pass through the pixels of the same color of the color filter, reflected light without color mixture can be obtained.

The light incident through the color filter is reflected by a second reflecting surface, and the reflected second reflected light passes through the color filter after being reflected by the first reflecting surface. By emitting the reflected light in a direction different from the first reflected light, unnecessary reflected light does not become stray light and color mixing does not occur.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be illustratively described in detail below with reference to the drawings. However, dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, and are merely illustrative examples. It's just

FIG. 1 is an explanatory view for explaining a reflection type liquid crystal display device 10 according to an embodiment of the present invention, and FIG. 2 is an explanatory view of a main part thereof. In FIG. 1, a reflecting plate 1 includes a transparent lower substrate 11 made of glass and a lower substrate 11.
A reflective layer composed of a resin layer 6 and a reflective film 4 is disposed thereon, and the reflective layer is formed by disposing a color filter 35 and an upper substrate 2 on the upper surface of the reflective plate 1 via a liquid crystal layer 38. The liquid crystal display device 10 is configured. FIG. 1 is a schematic view, in which a liquid crystal layer 38, a color filter 35, and an upper substrate 2 are shown.
The difference between the refractive indices is not illustrated. In addition, in FIG. 1, the reflection film 4 is drawn in a planar shape, but in reality, as shown in FIG.
It has a structure in which a reflective film 4 is arranged on the upper part. The reflection film 4 formed on each of the irregularities is referred to as a unit reflection area 1.
The unit reflection area 13 has two types of light: an effective reflection surface 17 that reflects the incident light 7 in a direction in which the image is viewed, and an ineffective reflection surface 18 that reflects light in a direction unrelated to the image viewing. It has a reflective surface.

The reflection plate 1 may have a configuration in which a resin layer 6 having a reflection film 4 formed on the surface thereof is disposed under the lower substrate 11 via a light transmission layer. Further, the unit reflection region 13 may be formed by directly providing the lower substrate 11 with an uneven shape without using the resin layer 6.

Part of the incident light 7 incident on the reflection type liquid crystal display device 10 from the vertical direction is specularly reflected on the upper surface of the upper substrate 2, but light passing through the upper substrate 2 is
To reach. Since the unit reflection area 13 is disposed with the inclination angle of the effective reflection surface 17 being different from the area A toward the area B, the incident light 7
Is reflected at an angle θ ₁ (reflected light 8), and is reflected at an angle θ ₃ (reflected light 9) in a region B.

Since the effective reflecting surface 17 has a curved surface, the reflected light 8 falls within the range of the angle δ _1.
a, substantially forms a circular emission region 14 extending as 8b, also the reflected light 9 to form the same emission region 14 extending within the range of the angle [delta] ₃ reflected light 9a, as 9b. This emission area 14
Is formed at a position vertically above a position separated from the end surface of the upper substrate 2 of the reflection type liquid crystal display device 10 by a distance M.

By defining the center 12 of the emission area 14 at such a position, the image displayed by the reflective liquid crystal display device 10 in an area different from the regular reflection area where the incident light 7 is regularly reflected on the upper surface of the upper substrate 2. Thus, the reflection type liquid crystal display device 10 which is bright and has high contrast can be obtained. Further, the emission area 14 is the reflection type liquid crystal display device 1.
Since the reflected light from each position of 0 is collected, it is possible to obtain the reflective liquid crystal display device 10 having a small luminance distribution in the display surface.

The effective reflection surface 17 of the unit reflection area 13
Is set such that the angle θ between the reflected light 8, 15, 9 and the incident light 7 increases from the area A to the area B as shown in FIG. In addition, the light is incident on the reflective liquid crystal display device 10 in a vertical direction, and the pixels 35 a and 3 of a predetermined color of the upper substrate 2 and the color filter 35 are formed.
The inclination angle of the effective reflection surface 17 is determined so that the incident light 7 that has passed through 5b and 35c is reflected, and the reflected lights 8, 15, and 9 pass through pixels of the same color as the incident light 7.

By determining the reflection angle in this manner,
A clear color image without color mixture can be visually recognized. Here, the pixels of the color filter through which the reflected lights 8, 15, 9 pass may be the same pixels 35a, 35b, 35c as the incident light 17 as shown in FIG.
The same effect can be obtained as long as the pixel is the same color, even if the pixel is arranged at a position different from the pixel through which the pixel 7 passes.

Since the unit reflection area 13 has an uneven shape, there is an invalid reflection surface 18 that reflects the incident light 7 in a direction unrelated to the visual recognition of an image. That is, the incident light 7 incident on the reflection type liquid crystal display device 10 from the vertical direction.
Is reflected by the ineffective reflection surface 18 and is emitted in a direction different from the emission area 14, and the reflected light 16 is reflected by the reflection type liquid crystal display device 1 such as the color filter 35 or the upper substrate 2.
0 at the interface smaller than the critical angle and exits the upper substrate 2
8 are defined.

By determining the inclination angle of the ineffective reflection surface 18 in this way, the reflected light 16 is reflected by the reflection type liquid crystal display device 10.
Can be prevented from becoming stray light inside. That is, the stray light passes through a pixel of a color different from the pixel of the color filter 35 through which the incident light 7 has passed, and is emitted from the direction of the emission area 14 while repeating total reflection inside the reflection type liquid crystal display device 10. Therefore, color mixing due to stray light can be prevented, and a clear color image can be visually recognized.

Next, an example of the shape of the unit reflection area 13 is shown in FIG.
This will be described with reference to FIGS. 4A and 4B and FIGS. FIGS. 3A and 3B are explanatory diagrams of the shape of the unit reflection area 13 in the reflection type liquid crystal display device 10, and FIGS.
(A), (b) is explanatory drawing which shows the optical path in the effective reflection surface 17 and the ineffective reflection surface 18. FIG. The description of the configuration common to the reflection type liquid crystal display device 10 of FIGS. 1 and 2 is omitted. Further, the difference in the refractive index between the upper substrate 2, the color filter 35, and the liquid crystal layer 38 is ignored.

3 (a) and 3 (b), the unit reflection area 13 includes an ineffective reflection surface 18 and an effective reflection surface 17 connected to the connecting portion 1.
9 and 20 are connected. Here, the unit reflection region 13 may have a concave shape as shown in FIG. 3A, or may have a convex shape as shown in FIG. 3B. A combination of a plurality of uneven shapes is used as the unit reflection area 13.
It may be. Further, the ineffective reflection surface 18 and the effective reflection surface 17
May be a flat surface or a curved surface.

The inclination angle β of the ineffective reflection surface 18 is arranged to be larger than the inclination angle α of the effective reflection surface 17.
The area of the reflection surface of the ineffective reflection surface 18 is
Is set to be smaller than the area of the reflection surface.
By defining the shape in this way, the area for reflecting the incident light 7 can be made larger on the effective reflection surface 17 as shown in FIG. 3A, so that more reflected light related to visual recognition of an image can be obtained. Light efficiency can be improved.
The shape of the effective reflection surface 17 may be determined so that the light reflected by the effective reflection surface 17 goes to the emission area 14 shown in FIGS.

The invalid reflection surface 18 and the effective reflection surface 1
7 is such that the shape thereof monotonously decreases or increases, and the connecting portions 19 and 20 of the ineffective reflection surface 18 and the effective reflection surface 17 have a curved surface shape in which the inclination of the tangent side changes monotonically. I have. More specifically, the curvature of the connecting portions 19 and 20 is set to have a radius that is at least twice the thickness of the reflective film 4.

As described above, the ineffective reflection surface 18 and the effective reflection surface 1
7. The direction of the reflected light can be continuously controlled by determining the shapes of the connecting portions 19 and 20. Further, since there is no abrupt change in the shape, when the reflective film 4 is formed on the surface of the resin layer 6, the possibility of defective formation of the reflective film 4 or cracks is reduced, and the uniform reflective film 4 is formed. It is possible to obtain. Furthermore, by forming the reflective film 4 with a metal film, the reflective film 4 can also serve as an electrode of the reflective liquid crystal display device 10. In this case, an electrode without disconnection can be obtained.

As shown in FIG. 4A, such an ineffective reflection surface 18 and an effective reflection surface 17 are provided on the reflection type liquid crystal display device 1.
The incident light 7 incident from a direction perpendicular to 0 is reflected by the ineffective reflection surface 18 to be reflected light 16a, and subsequently reflected by the effective reflection surface 17 connected to the ineffective reflection surface 18 via the connecting portion 19. The reflected light 16b is transmitted through the liquid crystal layer 38 and the color filter 35 to form an interface 2a between the upper substrate 2 and the outside.
Are inclined at an angle smaller than the critical angle, and are emitted outside the upper substrate 2 as reflected light 16c. By determining the inclination angle in this way, it is possible to prevent the reflected light 16a, 16b, 16c from becoming stray light inside the reflective liquid crystal display device 10,
Further, since the area of the ineffective reflection surface 18 can be reduced, most of the incident light 7 can be reflected by the effective reflection surface 17,
Reflective liquid crystal display device 10 having high light use efficiency without color mixing
Can be realized.

Next, the inclination angle between the effective reflection surface 17 and the ineffective reflection surface 18 will be described. In FIG. 4A, the incident angle when the incident light 7 incident from the direction perpendicular to the reflective liquid crystal display device 10 enters the invalid reflection surface 18 is θ ₄ , and the reflected light 16a is incident on the effective reflection surface 17. The incident angle at the time of incidence is θ ₅ , and the incident angle at which the reflected light 16b enters the interface 2a between the upper substrate 2 and the outside is θ ₆ .

At this time, the inclination angle α of the effective reflection surface 17
Angle β of the effective reflection surface 18, the incident angle θ ₄, Θ₅, Θ₆To
Is θ₄= Β, θ₅= 180 ° -α-2β, θ₆= 18
The relationship of 0 ° -2α-2β holds. Also, the upper substrate 2
The refractive index of₁, The refractive index of the layer outside the upper substrate 2 is n
Then, the reflected light 16 b is transmitted to the outside of the upper substrate 2.
In order to be emitted as c, according to Snell's law, sin θ
₆<N / n₁Should be satisfied.

Here, when the outer layer of the upper substrate 2 is an air layer having a refractive index of about 1, and a transparent substrate having a refractive index of about 1.5 such as a glass substrate is used as the upper substrate 2, the reflected light 22 Is emitted as reflected light 16c to the outside of the upper substrate 2,
It suffices to satisfy the condition of θ ₆ <40 °. That is, by determining the inclination angle β between the effective reflection surface 17 and the ineffective reflection surface 18 so as to satisfy the condition of 2α + 2β> 140 °, the incident light 7 incident from the direction perpendicular to the reflection type liquid crystal display device 10 is reflected. Stray light inside the liquid crystal display device 10 can be prevented. Conversely, 2α + 2β <140
°, the reflected light 16b as shown in FIG.
Is not emitted to the outside of the upper substrate 2 but is totally reflected at the interface 2a between the upper substrate 2 and the outside, and the incident light 7 becomes stray light inside the reflective liquid crystal display device 10.

From the above relationship, when the effective reflection surface 17 is arranged so that the inclination angle α is slightly larger than 0 °, the inclination angle β of the invalid reflection surface 18 may be set to 70 ° or more. In addition, in order to reflect the incident light 7 in the direction in which the image of the reflective liquid crystal display device 10 is viewed, the effective reflection surface 17 is often set to have an inclination angle α of α> 10 °. In such a case, the inclination angle β of the invalid reflection surface 18 may be set to β> 60 °. However, if β> 90 °, the incident light 7 incident from the direction perpendicular to the reflection type liquid crystal display device 10 cannot be reflected by the invalid reflection surface 18, and the inclination angle β of the invalid reflection surface 18 is 60 ° <β. <90 ° is set.

In the above description, the inclination angles of the effective reflection surface 17 and the ineffective reflection surface 18 are determined by the reflection type liquid crystal display device 10.
However, the inclination angles of the effective reflection surface 17 and the ineffective reflection surface 18 may be determined based on the incident light 7 incident from a perpendicular direction to the reference light.

FIG. 5 is a plan view of the reflector 1 having the unit reflection area 13 having the effective reflection surface 17 and the ineffective reflection surface 18 having the above-defined shapes. The unit reflection area 13 projects the center 12 of the emission area 14 on a virtual plane including the reflection film 4 and concentric circles a ₁ , a _2, ...
, A _n (n is an integer of 1 or more). A plurality of unit reflection areas 13 having an effective reflection surface 17 having the same reflection angle are arranged on the same radius of the concentric circle.

Each unit reflection area 13 receives incident light incident on the reflection plate 1 from a perpendicular direction to the effective reflection surface 1.
7 to form an exit area 14 and further exit area 14
The inclination angle of the effective reflection surface 17 is determined so that the peak of the reflected light from each unit reflection area 13 is concentrated at the center 12 of the unit reflection area. Further, the reflected light 1 reflected by the invalid reflection surface 18
6 is emitted in a direction different from the emission area 14.

FIG. 6 is a plan view of the unit reflection area 13 arranged on the reflection plate 1. In FIG. 6, broken lines indicate contour lines. The effective reflection surface 17 is connected to the ineffective reflection surface 18 via a connecting portion 19, and the unit reflection region 13 has an inclined surface toward the emission region 14. The effective reflection surface 17 has a curved surface shape whose curvature monotonously increases or decreases in order to form the emission area 14 with reflected light. Although the unit reflection areas 13 are basically arranged periodically or regularly, they need not have uniform dimensions, and may have random dimensions.

FIG. 7 is an explanatory view showing the structure of the reflection type liquid crystal display device 10 provided with the reflection plate 1 manufactured as described above. On the surface of the lower substrate 11, a thin film transistor (TFT) 32 is provided. On the lower substrate 11,
A resin layer 6 having an uneven shape is arranged on the upper surface, and the surface of the resin layer 6 is coated with a reflective film 4 made of a metal thin film. Further, the reflection film 4 is provided in the contact hole 41.
Through the TFT 32.

By interposing a liquid crystal layer 38 between the reflecting plate 1 configured as described above and the upper substrate 2 on which a black matrix 36, a color filter 35, and a transparent electrode (ITO) 37 are formed on the back surface, reflection is achieved. Liquid crystal display device 1
0. The reflective liquid crystal display device 10 having such a structure can provide a clear image that is bright, has high contrast, and has no color mixture.

The reflection plate of the present embodiment is not limited to a reflection type liquid crystal display device, but can be used for other reflection type display devices. Although not shown, the power of the backlight light source can also be reduced by using it for a transflective liquid crystal display device.

FIG. 8 shows a wireless information transmission device 39 such as a portable telephone or a low power wireless device using the reflection type liquid crystal display device 10 using the reflection plate according to the present embodiment as a display device. As shown in FIG. 8, the present wireless information transmission device 39 configured as above emits light that is formed in an area different from the regular reflection area of the incident light with respect to the light that is gripped and vertically incident on the monitor screen 40. The image on the monitor screen 40 can be visually recognized from the area 14, and is bright and has high contrast.
A clear image without color mixture can be visually recognized.

The present embodiment can be applied not only to the above-mentioned wireless information transmitting device 39 but also to electronic equipment such as a personal digital assistant, a portable information terminal such as a portable computer and a portable television. .

[0049]

As described above, according to the present invention,
An effective reflection surface and an ineffective reflection surface are arranged on the reflector, and the incident light that passes through the color filter and enters the effective reflection surface and the reflection light that reflects on the effective reflection surface and passes through the color filter are the same as the color filter. Since the light passes through the color pixel, it is possible to prevent color mixture of light. Further, since the reflected light reflected by the effective reflection surface is focused on the emission area formed in a predetermined direction, the light use efficiency can be improved. Also,
Since the reflected light reflected on the ineffective reflection surface is emitted in a direction different from the emission region, it is possible to prevent color mixing of light due to stray light.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating a reflective liquid crystal display device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram illustrating a main part of the reflective liquid crystal display device according to the embodiment of the present invention.

FIG. 3 is an explanatory diagram illustrating a unit reflection area.

FIG. 4 is an explanatory diagram illustrating the shapes of an effective reflection surface and an ineffective reflection surface.

FIG. 5 is a plan view of a reflector.

FIG. 6 is a plan view of a unit reflection area.

FIG. 7 is a schematic sectional view of a reflective liquid crystal display device.

FIG. 8 is a perspective view of a wireless information transmission device.

FIG. 9 is an explanatory diagram illustrating a conventional reflective liquid crystal display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reflector 4 Reflective film 10 Reflective liquid crystal display device 11 Lower substrate 13 Unit reflective area 14 Emission area 17 Effective reflective surface 18 Invalid reflective surface 19, 20 Connecting part 35 Color filter

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H042 DA01 DA12 DA14 DA17 DB08 DD01 DE04 2H091 FA02Y FA14X FA41Z GA01 GA13 LA03

Claims (19)

[Claims] 1. A substrate comprising: a substrate; a reflective layer disposed on the substrate; and a color filter, wherein the reflective layer has a plurality of unit reflective regions having a first reflective surface that reflects light in a predetermined direction. The incident light that has entered the first reflection surface after passing through a pixel of a predetermined color of the color filter is reflected by the first reflection surface,
An optical component, wherein an inclination angle of the first reflecting surface is determined so that the incident light of the color filter passes through a pixel having the same color as a color that has passed. 2. The unit reflection area includes a second reflection surface that reflects light in a direction different from the first reflection surface, and light incident on the second reflection surface after passing through the color filter is: The angle of inclination of the first reflection surface and the second reflection surface is adjusted so that the light is reflected by the second reflection surface and subsequently reflected by the first reflection surface, and then passes through the color filter and exits to the outside. 2. The optical component according to claim 1, wherein the optical component is determined. 3. The optical component according to claim 2, wherein the first reflection surface and the second reflection surface are arranged adjacent to each other via a connecting portion. 4. The optical component according to claim 2, wherein an area of the first reflection surface is larger than an area of the second reflection surface. 5. The optical component according to claim 2, wherein the inclination angle of the first reflection surface is smaller than the inclination angle of the second reflection surface. 6. The angle of inclination of the first reflecting surface is α, and the angle of inclination of the second reflecting surface is α.
When the inclination angle of the reflecting surface is β, 2α + 2β> 140 °
The optical component according to claim 2, wherein the following condition is satisfied. 7. The light incident on the reflection layer is reflected by the first reflection surface, is emitted to the outside of the optical member, and intersects with the light reflected by another first reflection surface and emitted to the outside. The optical component according to claim 1, wherein the unit reflection area is disposed on the substrate so as to form a common emission area. 8. A substrate, a reflective layer disposed on the substrate, a liquid crystal layer disposed on the opposite side of the reflective layer from the substrate, and disposed on a side of the reflective layer opposite to the substrate. The reflection layer has a plurality of unit reflection regions having a first reflection surface that reflects light in a predetermined direction, and passes through the liquid crystal layer and pixels of a predetermined color of the color filter. The incident light incident on the first reflecting surface is reflected by the first reflecting surface, and passes through the pixel of the same color as the color through which the incident light of the color filter passes so that the first reflecting surface A liquid crystal display device having a predetermined inclination angle. 9. The unit reflection area includes a second reflection surface that reflects light in a direction different from the first reflection surface, and light incident on the second reflection surface after passing through the color filter is: The angle of inclination of the first reflection surface and the second reflection surface is adjusted so that the light is reflected by the second reflection surface and subsequently reflected by the first reflection surface, and then passes through the color filter and exits to the outside. 9. The liquid crystal display device according to claim 8, wherein: 10. The liquid crystal display device according to claim 9, wherein the first reflection surface and the second reflection surface are disposed adjacent to each other via a connection. 11. The liquid crystal display device according to claim 9, wherein an area of the first reflection surface is larger than an area of the second reflection surface. 12. The tilt angle of the first reflection surface is equal to the second reflection angle.
The liquid crystal display device according to claim 9, wherein the inclination angle of the reflection surface is smaller than the inclination angle. 13. When the inclination angle of the first reflection surface is α and the inclination angle of the second reflection surface is β, 2α + 2β> 140.
The liquid crystal display device according to claim 9, wherein a condition of ° is satisfied. 14. The light incident on the reflection layer,
The unit reflection area is formed on a substrate so as to form a common emission area by intersecting with light reflected by a reflection surface, emitted to the outside of the optical member, reflected by another first reflection surface, and emitted to the outside. 9. The liquid crystal display device according to claim 8, wherein the liquid crystal display device is arranged in a position. 15. A substrate, comprising: a substrate; and a reflective layer disposed on the substrate, wherein the reflective layer has a first reflective surface that reflects light in a predetermined direction and a direction different from the first reflective surface. The second that reflects light
A plurality of unit reflection regions each including a reflection surface, wherein the reflection light reflected by the first reflection surface intersects with the reflection light reflected by the first reflection surface of another unit reflection region to form a common emission region. The reflected light reflected by the second reflecting surface is reflected by a first reflecting surface disposed adjacent to the second reflecting surface via a connecting portion and emitted in a direction different from the emission region. A reflecting plate characterized in that: 16. An image display unit comprising a liquid crystal display device, wherein the liquid crystal display device comprises: a substrate; a reflective layer disposed on the substrate; and a liquid crystal disposed on a side of the reflective layer opposite to the substrate. A layer, and a color filter disposed on the opposite side of the substrate of the reflective layer, the reflective layer has a plurality of unit reflective areas having a first reflective surface that reflects light in a predetermined direction, The incident light that has passed through the liquid crystal layer and the pixel of the predetermined color of the color filter and entered the first reflection surface is reflected by the first reflection surface, and the color that the incident light of the color filter has passed. An electronic device, wherein an inclination angle of the first reflection surface is determined so as to pass through pixels of the same color. 17. The unit reflection area includes a second reflection surface that reflects light in a direction different from the first reflection surface, and light incident on the second reflection surface after passing through the color filter is: The angle of inclination of the first reflection surface and the second reflection surface is adjusted so that the light is reflected by the second reflection surface and subsequently reflected by the first reflection surface, and then passes through the color filter and exits to the outside. 17. The electronic device according to claim 16, wherein the electronic device is determined. 18. The light of the same color as that of the color filter, wherein the incident light that has passed through the color filter and the first reflected light that reflects the incident light at the first reflection surface and exits through the color filter A light reflection method, wherein the light is reflected through a pixel. 19. Light incident through the color filter is reflected by a second reflecting surface, and the reflected second reflected light passes through the color filter after being reflected by the first reflecting surface. 19. The light reflection method according to claim 18, wherein the light is emitted in a direction different from the first reflected light.