JP2001108986A - Electroptical device and electronic appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a front light type electroptical device having a light guide plate disposed on the front side of an electro-optic panel, to provide an electronic appliance using this electrooptical device, which are constituted so as to suppress decrease in the display quality caused by moire. SOLUTION: The liquid crystal display device 1 has a reflection liquid crystal panel 2 with a plurality of pixels formed in a matrix, a translucent light guide plate 6 disposed on the front face of the liquid crystal panel 2, and a light source 7 to introduce light through the end of the light guide plate 6. In this device, a translucent scattering plate 9A is disposed on the optical path from the light guide plate 6 to the reflection layer 200 of the liquid crystal pane. Therefore, when a white color is displayed in the liquid crystal panel 2, the quantity of light exiting in the plane direction gradually changes by the scattering plate 9A, so that moire is hardly inconspicuous.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an electro-optical device and an electronic apparatus using the same. More specifically, the present invention relates to a so-called front light type electro-optical device and an electronic apparatus using the same.

[0002]

2. Description of the Related Art Conventionally, a reflection type liquid crystal panel (electro-optical panel) with low power consumption has been used as a display device of a portable device such as a mobile phone, but the display cannot be seen in a dark place such as at night. There is a problem. On the other hand, transmissive liquid crystal panels have a backlight so that they can be displayed even in dark places.However, the backlight consumes a lot of power. There is a problem that the display is difficult to see.

Therefore, as shown in FIG. 9, a reflection type liquid crystal panel 2, a retardation plate 3, a polarizing plate 4, a light guide plate 6, and a light reflection layer 200 are arranged in this order, and the vicinity of an end portion of the light guide plate 6 is arranged. A so-called front light type liquid crystal display device 1 in which a light source 7 such as a cold-cathode tube is arranged has been proposed. In the liquid crystal display device 1, light from the light source 7 is introduced into the light guide plate 6, and light is emitted from the light guide plate 6 toward the liquid crystal panel 2 so that the display can be viewed even in a dark place. Things. In the liquid crystal display device 1 having the front light, the display can be visually recognized through the light guide plate 6 in the daytime, so that the liquid crystal display device 1 can be used as a normal reflection type display device. And the display can be made visible.

The light guide plate 6 used in such a liquid crystal display device 1 has, for example, stripe-shaped irregularities regularly formed thereon. On the other hand, the liquid crystal panel 2
As shown in (A), a large number of pixels 11 are formed in a matrix, and the light incident on each pixel 11 is modulated. Therefore, in the case of the normally black mode, of the light reflected by the light reflection layer 200 (see FIG. 9) of the liquid crystal panel 2, the light that arrives from the pixel 11 to which the non-selection voltage is applied to the liquid crystal is polarized. Since such a pixel 11 is not emitted from the plate 4, such a pixel 11 is in a dark state, while light arriving from the pixel 11 to which the selection voltage is applied to the liquid crystal is emitted from the polarizing plate 4. It becomes bright.
Therefore, by controlling whether or not an electric field is applied to each pixel 11 to control the alignment state of the liquid crystal for each pixel 11, a predetermined display can be performed. Since the light that has reached from the boundary region 12 between the adjacent pixels 11 is not emitted from the polarizing plate 4, the intensity of the emitted light in the boundary region 12 between the pixels 11 in a bright state is as shown in FIG. At the boundary between the pixel 11 and the boundary region 12.

[0005]

However, in the conventional front-light type liquid crystal display device 1, the pixels 11 of the liquid crystal panel 2 are regularly arranged, and the irregularities of the light guide plate 6 are also regularly arranged. Therefore, when an image displayed on the liquid crystal panel 2 through the light guide plate 6 is viewed, moire is seen. That is, the light guide plate 6
Is formed with a stripe pattern of a luminescent part and a dark part due to the scattered light in the uneven part. When the luminescent part overlaps with the arrangement of the pixels 11, interference occurs and moire is seen.

Accordingly, an object of the present invention is to provide a front light type electro-optical device in which a light guide plate is disposed on the front side of an electro-optical panel, and an electronic apparatus using the electro-optical device, in which display quality due to moire is reduced. An object of the present invention is to provide a configuration capable of suppressing the reduction.

[0007]

In order to solve the above problems, according to the present invention, a reflection type electro-optical panel in which a plurality of pixels are formed in a matrix and a front surface side of the electro-optical panel are arranged. Electro-optics having a light-transmitting light guide plate and a light source for introducing light from an end of the light guide plate, wherein light incident on the light guide plate from the light source is emitted from the light guide plate to the electro-optical panel. The apparatus is characterized in that light scattering means is provided on an optical path from the light guide plate to the reflection layer of the electro-optical panel.

In the electro-optical device of the front light type according to the present invention, when white display is performed by the light scattering means, the amount of emitted light changes smoothly in the in-plane direction. Therefore, a stripe pattern of the bright portion and the dark portion is formed on the light guide plate due to the scattered light in the uneven portion, and even if the bright portion overlaps with the arrangement of the pixels, no mutual interference occurs, so that moire does not occur. .

In the present invention, when the intensity of light emitted from a pixel in a bright state of the electro-optical panel to the outside of the device and the intensity of light emitted from a boundary region between two pixels to the outside of the device are defined as R1 and R2, respectively. , R1 and R2 preferably satisfy the following formula (R2 / R1)> 0.2.

In the present invention, the light scattering means is, for example, a light scattering plate arranged between the light guide plate and the electro-optical panel.

In the present invention, the light scattering means is, for example, a light scattering layer formed on an adhesive layer disposed between the light guide plate and the electro-optical panel.

In the present invention, the light scattering means may be a light scattering layer obtained by roughening the surface of the light reflection layer of the electro-optical panel.

Such an electro-optical device can be used to constitute a display unit in, for example, portable electronic equipment.

[0014]

Embodiments of the present invention will be described with reference to the drawings. The basic configuration of a liquid crystal display device as an electro-optical device to which the present invention is applied is the same as that of a conventional liquid crystal display device.

Embodiment 1 (Overall Configuration) A front light type liquid crystal display device to which the present invention is applied will be described with reference to FIG.

FIG. 1 is a sectional view of the liquid crystal display device of the present embodiment in a state where an optical system is disassembled. The cross section of the liquid crystal panel shown in this drawing corresponds to a cross section taken along line HH 'in FIG. 4 described later.

In FIG. 1, a front light type liquid crystal display device 1 has a reflective layer 20 such as an aluminum film.
A reflective liquid crystal panel 2, a retardation plate 3, a polarizing plate 4, and a planar illuminant 5 are disposed in this order. The liquid crystal display device 1 of the present embodiment includes a retardation plate 3 and a liquid crystal panel 2.
A light-transmitting light-diffusing plate 9A (light-diffusing means) exhibiting a function described below is disposed between the light-diffusing plate and the light-diffusing plate 9A.

(Configuration of Planar Light Emitting Element 5)
The light guide plate 6 includes a light guide plate 6 arranged on the front side of the polarizing plate 4 and a light source 7 arranged near an end of the light guide plate 6. When the outside is bright, the planar light-emitting body 5 transmits the outside light to guide the light to the inside of the liquid crystal panel 2, and the reflection layer 20.
The display content formed on the liquid crystal panel 2 can be visually recognized by the light reflected at 0. On the other hand, when the outside is dark, the planar light emitter 5 can emit the illumination light LA from the lower surface of the light guide plate 6 toward the liquid crystal panel 2 by turning on the light source 7. Thus, the display contents formed on the liquid crystal panel 2 can be visually recognized even at night.

The light guide plate 6 used in such a liquid crystal display device 1 has a structure as described with reference to FIGS.
Stripe-like irregularities are regularly formed.

FIG. 2 is a sectional view showing a schematic structure of the planar light-emitting body 5 used in the liquid crystal display device 1 of the present embodiment. FIG.
FIG. 3 is a partial cross-sectional view of a part of the planar light-emitting body 5 used in the liquid crystal display device 1 of the present embodiment, which is cut in a lateral direction.

In FIG. 2, the planar light-emitting body 5 used in the liquid crystal display device 1 of the present embodiment includes a light source 7 including a point light source 71 such as a light-emitting diode, and an acrylic resin or a polycarbonate resin formed by injection molding or the like. A light guide plate 6 having a light transmitting property and a point light source 71 in the light guide plate 6
A light-scattering plate 63 of a transmission type adhered to an end surface 62 opposite to the end surface 61 on the side where is disposed, and a reflecting plate 64 adhered to the surface of the light-scattering plate 63.

On the surface of the light guide plate 6, a large number of stripe-shaped convex portions having gentle slopes 65 and steep slopes 66 are formed in parallel. In FIG. 2, the number of the convex portions is limited to three, and the shape of the convex portions is schematically illustrated in an enlarged manner so that the shape of the convex portions can be easily understood.

In the light guide plate 6, light propagating along the plate surface is totally reflected by the high light refraction index of the light guide plate 6 and does not leak to the outside even if it hits the back surface or the gentle slope 65 of the light guide plate 6. Although the propagation direction changes little and the light propagates again along the plate surface in the light guide plate 6, if the incident angle on the steep slope 66 is smaller than the critical angle among the light hitting the steep slope 66, the surface side of the light guide plate 6 When the incident angle on the steep slope 66 is larger than the critical angle, the light is totally reflected. When the reflected light reaches the back surface of the light guide plate 6, if the incident angle on the back surface is larger than the critical angle, the light is totally reflected and propagates through the light guide plate 6 again.

On the other hand, when the angle of incidence on the back surface is smaller than the critical angle, the light is not reflected and is emitted from the back surface of the light guide plate 6 downward as illumination light LA. In this case, as the steep slope 66 becomes steeper, the average emission direction of the illumination light LA becomes closer to the normal direction of the plate surface of the light guide plate 6, so that the illumination efficiency is improved. Since the proportion of light that is smaller than the angle increases, the steep slope 6 is not totally reflected.
The leakage light LB emitted from 6 increases. This leakage light L
Since visibility increases as B increases, the steep slope 66 is set to an appropriate inclination angle, for example, about 30 ° to 50 °.

Here, the light emitted from the point light source 71 once advances to the left side in the figure along the plate surface of the light guide plate 6, and a part of the light hits the gentle slope 65 or the back surface. Most of the light is totally reflected on the gentle slope 65 and the rear surface, and propagates while remaining in the light guide plate 6. The inclination angle of the gentle slope 65 is such that light emitted from the point light source 71 and impinging on the gentle slope 65 does not leak to the outside without being totally reflected, and when viewed in the light traveling direction of the gentle slope 65. The length of the oblique side in the cross-sectional view is increased so that the pitch for forming the protruding portions is not increased, and the number and area of the steep slopes 66 are not reduced. When the light thus propagated reaches the left end face 62 of the light guide plate 6 in the figure, the light scattering plate 6
3, the light is reflected by the reflection plate 64, and travels inside the light guide plate 6 to the right side in the figure. Then, since the steep slope 66 is formed on the surface side in the traveling direction of the reflected light, the steep slope 66 is formed.
Most of the light hit by the light becomes illumination light LA emitted from the back surface of the light guide plate 6 by total reflection, and part of the light passes through the steep slope 66 to become leakage light LB.

As shown in FIG. 3, three point light sources 71 used for the planar light emitter 5 are arranged substantially evenly along one end face 61 of the light guide plate 6. Each point-like light source 71 has a light emission characteristic having directivity such that the irradiation in the front direction is the highest as shown by the arrow in the drawing, and the illuminance decreases rapidly as the distance from the front direction increases.
For this reason, when light is introduced from the point light source 71 into the light guide plate 6, most of the light reaches the opposite end 62,
Light that has been scattered and reflected by the light scattering plate 63 and the reflecting plate 64 formed at the opposite end 62 is radiated downward from the steep slope 66 as illumination light LA. Therefore, since the optical path length from the point light source 71 to the light scattering plate 63 can be increased, even if the scattering intensity of the light scattering plate 63 is small,
Since the light scattered by the light scattering plate 63 is equivalent to the light from the linear light source, it is possible to obtain sufficient in-plane uniformity of the illumination light LA and reduce the bias of the leakage light LB.

Here, if the directivity of the point light source 71 is not so strong, a certain degree of in-plane uniformity of illumination light and uniformity of leakage light can be ensured even without the light scattering layer 63. .

Instead of using the light scattering plate 63, the surface (reflection surface) of the reflection plate 64 is formed rough, or another material is selectively adhered to the surface of the reflection plate 64 to remove fine irregularities. The light scattering effect may be obtained by forming. Further, a light scattering portion in which fine irregularities are formed on the end surface portion 62 of the light guide plate 6 may be used.

(Structure of Liquid Crystal Panel 2) FIG. 4 is a plan view of the liquid crystal panel 2 used in the liquid crystal display device 1 as viewed from the counter substrate 20 side. FIG. 5 is a block diagram schematically showing a configuration of the liquid crystal panel 2. As shown in FIG.

In FIG. 1 and FIG.
The liquid crystal panel 2 used in the first embodiment has an active matrix substrate 30 on which pixel electrodes 8 are formed in a matrix, a counter substrate 20 on which a counter electrode 22 and a light-shielding film 25 are formed, and a liquid crystal panel 2 sealed between these substrates 20 and 30. Liquid crystal 3 pinched
9 is roughly constituted. The active matrix substrate 30 and the counter substrate 20 are bonded to each other via a predetermined gap by a sealing material 52 containing a gap material formed along the outer peripheral edge of the counter substrate 20. Between the active matrix substrate 30 and the counter substrate 20, a liquid crystal sealing region 38 is defined by a sealing material 52 containing a gap material, and a liquid crystal 39 is sealed inside this region. As the sealing material 52, an epoxy resin, various ultraviolet curable resins, or the like can be used. As the gap material, an inorganic or organic fiber or sphere of about 2 μm to about 10 μm can be used. On the surfaces of the active matrix substrate 30 and the counter substrate 20, alignment films 46 and 47 made of polyimide resin or the like are formed.

The opposing substrate 20 is smaller than the active matrix substrate 30, and the peripheral portion of the active matrix substrate 30 is bonded so as to protrude from the outer peripheral edge of the opposing substrate 20. Therefore, the active matrix substrate 30
Drive circuits (scanning line drive circuit 70 and data line drive circuit 6)
0) and the input / output terminals 45 are exposed from the counter substrate 20.

The sealing material 52 is partially interrupted to form a liquid crystal injection port 241. Therefore, after the opposing substrate 20 and the active matrix substrate 30 are bonded to each other, the liquid crystal 39 is sealed from the liquid crystal injection port 241, and then the liquid crystal injection port 241 is closed with the sealant 242. The counter substrate 2
At 0, a light-shielding film 55 for parting the display is also formed to cut off the image display area 7 in a horizontally long rectangle inside the sealing material 52.

In the liquid crystal panel 2 configured as described above, the plurality of pixels 11 formed in a matrix and constituting the image display area 7 are, as shown in FIG.
And a TFT 10 for controlling the pixel electrode 8, and a data line 90 to which an image signal is supplied is connected to a TF.
It is electrically connected to the source of T10. The image signals S1, S2,..., Sn are sequentially supplied to the data line 90. The scanning signals G1, G2,..., Gm are applied in a pulsed manner to the gate electrode of the TFT 10 via the scanning line 91 in this order. The pixel electrode 8 is electrically connected to the drain of the TFT 10, and by closing the switch of the TFT 10 for a certain period, the image signal S1 supplied from the data line 90,
.., Sn are written at a predetermined timing. The image signals S1, S2,..., Sn of a predetermined level written in the liquid crystal via the pixel electrodes 8 are held for a certain period between the counter electrodes 22 formed on the counter substrate 20. Here, a storage capacitor 40 is added in parallel with a liquid crystal capacitor formed between the pixel electrode 8 and the counter electrode 22 in order to prevent the held image signal from leaking.

In the liquid crystal display device 1 configured as described above, the image signals S1, S2,
When the orientation state of the liquid crystal 39 is controlled for each pixel 11 by... Sn, the irradiation light LA emitted from the planar light emitter 5 is obtained.
After being adjusted to a predetermined polarization state by the polarizing plate 4 and the phase difference plate 3, the light enters the liquid crystal panel 2 and undergoes light modulation for each pixel. Therefore, in the case of the normally black mode, among the light reflected by the light reflection layer 200 of the liquid crystal panel 2, the light reaching from the pixel 11 to which the non-selection voltage is applied to the liquid crystal is not emitted from the polarizing plate 4. While such a pixel 11 is in a dark state, light arriving from the pixel 11 to which the selection voltage is applied to the liquid crystal is emitted from the polarizing plate 4, so that such a pixel 11 is in a bright state. Therefore, by controlling whether or not an electric field is applied to each pixel 11 to control the alignment state of the liquid crystal for each pixel 11, a predetermined display can be performed.

FIGS. 6A and 6B are explanatory diagrams showing the arrangement of pixels in the liquid crystal panel shown in FIG. 1 and along the line AA 'shown in FIG. 6A, respectively. FIG. 7 is an explanatory diagram showing a state in which the amount of light emitted outside the device changes.

In this embodiment, as shown in FIG. 1, a light scattering plate 9A is disposed between the retardation plate 3 and the liquid crystal panel 2. Therefore, the light reflected by the reflection layer 200 of the liquid crystal panel 2 is scattered by the light scattering plate 9A.

For this reason, as shown in FIG. 6A, in the vicinity of the boundary region 12 between the pixels 11 in a bright state, the intensity of light emitted to the outside of the liquid crystal display device (emitted through the light guide plate 6 to the outside). As shown in FIG. 6B, the intensity of the generated light is changed from the pixel 11 in the bright state to the boundary area 12.
Therefore, the intensity of the emitted light gradually decreases, and then the intensity of the emitted light gradually increases as the pixel 11 moves to a bright state.

The bright pixel 1 of the liquid crystal panel 2
1 (outgoing light intensity through the light guide plate 6 and out of the liquid crystal display device) and outgoing light intensity from the boundary region 12 between the two pixels 11 to the outside of the liquid crystal display device ( When the intensities of the light transmitted through the light guide plate 6 and emitted to the outside are R1 and R2, respectively, R1 and R2 have a relationship satisfying the following expression (R2 / R1)> 0.2. That is, the intensity of light emitted from the pixel 11 in a bright state of the liquid crystal panel 2 to the outside of the liquid crystal display device,
The difference between the intensity of the emitted light from the boundary region 12 and the outside of the liquid crystal display device is set so as not to be increased to a certain extent by inserting the light scattering plate 9A.

Therefore, in the liquid crystal display device 1 of the present embodiment, even though the pixels 11 of the liquid crystal panel 2 are regularly arranged and the irregularities of the light guide plate 6 are regularly arranged, the light scattering plate 9A
As a result, in the image displayed on the liquid crystal display device 1, the brightness in the pixel 11 and the boundary region 12 in a bright state are leveled, so that moire hardly occurs.

Here, the light reflecting layer 200 may be formed inside the liquid crystal panel 2.

The phase difference plate 3 is used instead of the light scattering plate 9A.
A similar effect can be obtained by mixing a light scattering member in the adhesive layer to which the liquid crystal panel 2 is bonded.

[Second Embodiment] FIG. 7 is a sectional view of an exploded optical system of a liquid crystal display device 1 according to a second embodiment of the present invention.

In the first embodiment, when providing the light scattering means on the optical path from the light guide plate 6 to the light reflection layer 200 of the liquid crystal panel 2, the light scattering plate 9 A is provided between the phase difference plate 3 and the liquid crystal panel 2. However, in this embodiment, as shown in FIG. 7, the surface of the reflective layer 200 made of an aluminum film formed inside the liquid crystal panel 2 is roughened to form the surface of the reflective layer 200 itself as shown in FIG. We use as.

Also in the case of such a configuration, the intensity of the light emitted to the outside of the liquid crystal display device in the boundary region 12 between the pixels 11 in the bright state shown in FIG. As shown in FIG. 6B, the intensity of the light emitted to the outside moves from the pixel 11 in a bright state to the boundary region 12, so that the intensity of the emitted light gradually decreases. The intensity of the emitted light gradually increases as the pixel 11 moves to a bright state.

The intensity of light emitted from the pixels 11 in the bright state of the liquid crystal panel 2 to the outside of the liquid crystal display device (the intensity of light transmitted through the light guide plate 6 and emitted to the outside), and the intensity of light emitted from the two pixels 11 When the intensity of light emitted from the boundary region 12 to the outside of the liquid crystal display device (the intensity of light transmitted through the light guide plate 6 and emitted to the outside) is R1 and R2, respectively, R1 and R2 are represented by the following formula (R2 / R1)> 0.2. That is, the difference between the intensity of light emitted from the pixel 11 in the bright state of the liquid crystal panel 2 to the outside of the liquid crystal display device and the intensity of light emitted from the boundary region 12 to the outside of the liquid crystal display device is determined by forming the light scattering layer 9B. More than a little,
It is set so that it does not grow.

Therefore, in the liquid crystal display device 1 of the present embodiment, even though the pixels 11 of the liquid crystal panel 2 are regularly arranged and the irregularities of the light guide plate 6 are regularly arranged, the light scattering plate 9A
Accordingly, in the image displayed on the liquid crystal display device 1, the brightness in the pixel 11 and the boundary region 12 in a bright state are leveled, and therefore, moire hardly occurs.

[Other Embodiments] As a light scattering means formed on an optical path from the light guide plate 6 to the light reflection layer 200 of the liquid crystal panel 2, light is interposed between the retardation plate 3 and the polarizing plate 4. The scattering plate 9A may be provided.

Further, in the above-described embodiment, an active matrix type liquid crystal panel using TFTs as pixel switching elements is used as the liquid crystal panel 2. However, if the liquid crystal panel has pixels arranged in a matrix, pixel switching is performed. An active matrix type liquid crystal panel using thin-film diode elements as elements, or stripe-shaped electrode patterns are formed on each of a pair of substrates in a direction that intersects, and pixels are formed in a matrix by the intersections of these electrode patterns. If the present invention is applied to a liquid crystal display device using a passive matrix type liquid crystal panel, generation of moire can be prevented.

Further, a liquid crystal 39 is used as an electro-optical material.
The present invention is not limited to the device using the device, and the present invention is applied to other electro-optical devices as long as the orientation state of the electro-optical material is changed by an applied electric field and the front-light type electro-optical device exhibits a light modulation action. May be.

[Specific Examples of Electronic Apparatus] The liquid crystal display device 1 to which the present invention is applied can be used as a display section of various electronic apparatuses described below.

FIGS. 8A, 8B and 8C respectively show
1 is an external view of each electronic device using a liquid crystal display device 1 to which the present invention has been applied.

FIG. 8A is an external view of a portable telephone. In this figure, reference numeral 1000 denotes a mobile phone main body,
Reference numeral 1001 denotes a display unit configured by the liquid crystal display device 1 to which the present invention is applied.

FIG. 8B is an external view of a wristwatch-type electronic device. In this figure, reference numeral 1100 denotes a watch body,
Reference numeral 1101 denotes a display unit configured by the liquid crystal display device 1 to which the present invention is applied.

FIG. 8C is an external view of a portable information processing apparatus such as a word processor and a personal computer. In this figure, 1200 indicates an information processing apparatus, 1202 indicates an input unit such as a keyboard, 1206 indicates a display unit constituted by the liquid crystal display device 1 to which the present invention is applied, and 1204 indicates an information processing apparatus main body.

[0055]

As described above, in the front light type electro-optical device and electronic apparatus according to the present invention, by adding light scattering means, when white display is performed, light is emitted in the in-plane direction. Since the emitted light amount is changed smoothly, moire does not occur.

[Brief description of the drawings]

FIG. 1 is an exploded sectional view showing an optical system of a liquid crystal display device to which the present invention is applied.

FIG. 2 is a cross-sectional view showing a schematic structure of a planar light-emitting body used in the liquid crystal display device shown in FIG.

FIG. 3 is a partial cross-sectional view of a part of the planar light-emitting body used in the liquid crystal display device shown in FIG.

FIG. 4 is a plan view of a liquid crystal panel used in the liquid crystal display device shown in FIG. 1 when viewed from a counter substrate side.

FIG. 5 is a block diagram showing a configuration of the liquid crystal panel shown in FIG.

FIGS. 6A and 6B are an explanatory diagram showing an arrangement of pixels in the liquid crystal panel shown in FIG. 1, and FIGS.
FIG. 9 is an explanatory diagram showing a state in which the amount of light emitted outside the device changes along the line AA ′ shown in FIG.

FIG. 7 is a cross-sectional view showing a state where an optical system of a liquid crystal display device according to another embodiment of the present invention is disassembled.

FIGS. 8A, 8B, and 8C are external views of a mobile phone, a wristwatch-type electronic device, and a portable information processing device using a liquid crystal display device to which the present invention is applied, respectively. It is an external view.

FIG. 9 is an exploded view showing a configuration of an optical system of a conventional liquid crystal display device.

FIGS. 10A and 10B are an explanatory diagram showing an arrangement of pixels in the liquid crystal panel shown in FIG. 9, and FIGS.
It is explanatory drawing which shows a mode that the emitted light amount outside the apparatus changes along CC 'line shown to (A).

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 liquid crystal display device (electro-optical device) 2 reflective liquid crystal panel (electro-optical panel) 3 retardation plate 4 polarizing plate 5 planar illuminator 6 light guide plate 7 light source 8 pixel electrode 9A light scattering plate (light scattering means) 9B Light scattering layer (light scattering means) formed on reflective layer surface 10 TFT for pixel switching 20 Counter substrate 22 Counter electrode 25 Shielding film 30 Active matrix substrate 39 Liquid crystal (electro-optical material) 63 Light scattering plate of light guide plate 64 Light guide plate Reflector 65 Slightly inclined surface of light guide plate 66 Steeply inclined surface of light guide plate 71 Point light source 200 Reflection layer LA Light emitted from light guide plate to liquid crystal panel LB Light leaked from light guide plate

Claims (6)

[Claims] 1. A reflective electro-optical panel in which a plurality of pixels are formed in a matrix, a light-transmitting light guide plate disposed on a front side of the electro-optical panel, and light from an end of the light guide plate. And a light source for introducing light from the light source to the light guide plate.The electro-optical device in which the light guide plate irradiates the light from the light guide plate to the electro-optical panel, from the light guide plate to the reflection layer of the electro-optical panel. An electro-optical device comprising a light scattering means on an optical path leading to light. 2. The device according to claim 1, wherein the intensity of light emitted from the lit pixel of the electro-optical panel to the outside of the device and the intensity of light emitted from the boundary region between the two pixels to the outside of the device are respectively represented by R1.
And R2, wherein R1 and R2 satisfy the following equation (R2 / R1)> 0.2. 3. The electro-optical device according to claim 1, wherein the light scattering means is a light scattering plate disposed between the light guide plate and the electro-optical panel. 4. The electric device according to claim 1, wherein the light scattering means is a light scattering layer formed on an adhesive layer disposed between the light guide plate and the electro-optical panel. Optical device. 5. The electro-optical device according to claim 1, wherein the light scattering means is a light scattering layer obtained by roughening a surface of the light reflecting layer of the electro-optical panel. 6. An electronic apparatus, wherein a display unit is constituted by the electro-optical device defined in claim 1.