JP5143590B2 - Liquid crystal device and electronic device - Google Patents

Description

  The present invention relates to a liquid crystal device and an electronic apparatus.

As a backlight (illumination device) of a transmissive liquid crystal device, one having a different light source for each color is known in order to widen the color gamut and enhance expressive power. In this type of backlight, the position of the light source is different for each color due to its structure, and therefore, the technical development for uniformly mixing the output light of the light sources of the respective colors is the main.
JP 2007-65658 A

  By the way, the liquid crystal panel itself has a viewing angle characteristic, and a color change occurs when the liquid crystal panel is observed from an oblique direction. This coloring cannot be improved by the uniform whiteness of the backlight as described above. Further, in the current specifications of the liquid crystal panel, only the angle of the high contrast area is displayed, and there is little improvement in coloring. In a liquid crystal panel of a horizontal electric field method such as a vertical alignment method or IPS (In-Plane Switching), the liquid crystal panel is improved to some extent by a technique such as making the liquid crystal multi-domain or providing a voltage difference in the pixel.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a liquid crystal device in which coloring caused by viewing angle characteristics of a liquid crystal panel is reduced and display quality is improved.

The liquid crystal device according to the present invention, provided in order to solve the above problems, a liquid crystal panel in a vertical alignment mode comprising a liquid crystal layer sandwiched between a pair of substrates and a lighting device that supplies illumination light to the liquid crystal panel The lighting device includes a light source composed of a white LED, and the white LED is provided for each of the light emitting elements and a plurality of light emitting elements that emit color lights of different colors. A first sealing material that seals the entire emission surface and a second sealing that has a refractive index different from that of the first sealing material and that is provided on a part of the emission surface of the first sealing material The color light radiant intensity distribution emitted from the lighting device is, for each color light , such that as the polar angle increases, the radiant intensity of blue light becomes greater than the radiant intensity of other color lights. set 1 shape or refractive index of the sealing material and the second sealing material, liquid crystal We compensate the viewing angle characteristics of each of the display colors in the panel.
According to this configuration, by providing the illuminating device having a radiation intensity distribution that compensates the viewing angle characteristics of the liquid crystal panel, it is possible to suppress display coloring and to obtain a liquid crystal device having excellent display quality.

And the light scattering layer is provided on the surface of the liquid crystal panel side of the lighting device, the light scattering layer, have a scattering distribution for varying the radiant intensity distribution of the color lights, different from each other at least two color light angle It is preferable to scatter in the distribution. Thus, the radiation intensity distribution may be adjusted by a light scattering layer provided separately from the illumination device.

When the LCD panel is a vertical alignment mode, because it tends to be insufficient brightness of the blue light, by adopting the above configuration, it appears colored yellow are displayed when viewing the liquid crystal panel obliquely Can be suppressed.

Next, an electronic apparatus according to the present invention, obtain Bei the liquid crystal device of the present invention described above.
According to this configuration, it is possible to provide an electronic apparatus including a high-quality display unit in which coloring when observed from an oblique direction is reduced.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a cross-sectional view showing a schematic configuration of the liquid crystal device of the present embodiment. FIG. 2 is a plan view illustrating a schematic configuration of the illumination device according to the present embodiment.
In each drawing, in order to make each component easy to see, the dimensional ratio, scale, etc. of each component are appropriately changed.

The liquid crystal device 100 according to the present embodiment is mainly composed of the liquid crystal panel 10 and the illumination device 30. An optical member 36 including a plurality of optical elements (33 to 35) is disposed between the liquid crystal panel 10 and the lighting device 30.
The liquid crystal panel 10 includes an element substrate 11 and a counter substrate 12, and a liquid crystal layer 50 is sealed inside a sealing material 13 provided in an annular shape along the peripheral edges of the element substrate 11 and the counter substrate 12. . In the liquid crystal layer 50, spacers 29 are dispersed to maintain a distance (cell gap) between the element substrate 11 and the counter substrate 12.

  The element substrate 11 has a substrate such as glass or plastic as a base, and a liquid crystal control layer 21 including a pixel electrode 16 made of a transparent conductive material and an alignment film (not shown) is formed on the liquid crystal layer 50 side. . A polarizing plate 6 a is disposed on the surface of the element substrate 11 opposite to the liquid crystal layer 50.

The counter substrate 12 has a substrate such as glass or plastic as a base, and a liquid crystal control layer 22 including a counter electrode 17 made of a transparent conductive material and an alignment film (not shown) is formed on the liquid crystal layer 50 side. . A polarizing plate 6b that forms a pair with the polarizing plate 6a is disposed on the surface of the counter substrate 12 opposite to the liquid crystal layer 50.
A color filter 18 for performing color display is formed between the counter substrate 12 and the counter electrode 17. The color filter 18 has a structure in which a red material layer 18R, a green material layer 18G, and a blue material layer 18B formed in each region (pixel region) overlapping the pixel electrode 16 in plan view are periodically arranged. Yes. A light shielding layer BM is formed between the color material layers of the respective colors.

  In addition, the element substrate 11 has an overhang region 11a that protrudes from the counter substrate 12 in a plan view, and a mounting terminal region is formed in the overhang region 11a. Specifically, a wiring pattern (not shown) is formed in the overhanging region 11a, and the pixel electrode 16 (or the switching element connected to the pixel electrode 16) and the counter electrode 17 are connected to the wiring pattern with respect to the wiring pattern. It is electrically connected via a conductive material. Further, a liquid crystal driving IC (electronic component) 20 for electrically driving the liquid crystal panel 10 is mounted on the wiring pattern of the overhang region 11a by COG (Chip on Glass). As the mounting form of the liquid crystal driving IC 20, other forms such as FPC (Flexible Print Circuit) mounting can be adopted in addition to the COG mounting.

  The liquid crystal panel 10 may be either a passive matrix type or an active matrix type, and the liquid crystal orientation may be various known forms such as a TN type, a VAN type, an STN type, a ferroelectric type, and an antiferroelectric type. Can be taken. In addition, a reflective liquid crystal display device may be configured by forming a reflective film on the element substrate 11, and a translucent reflective liquid crystal display by forming a light transmitting portion such as an opening or a slit in the reflective film. An apparatus can also be constructed.

  The specific configuration of the liquid crystal control layers 21 and 22 is appropriately changed according to the form of the liquid crystal panel 10. For example, when the passive matrix type liquid crystal panel 10 is configured, instead of the pixel electrode 16 and the counter electrode 17, stripe electrodes extending in directions intersecting with each other are formed in the liquid crystal control layers 21 and 22, respectively. Further, in the case of the active matrix type, a switching element is provided corresponding to the pixel electrode 16, and the counter electrode 17 is a stripe shape or a flat solid shape (a uniform plane shape covering the display area) facing the plurality of pixel electrodes 16. ) Common electrode.

  As shown in FIGS. 1 and 2, the lighting device 30 is mounted by periodically arranging a red light emitting element 31R, a green light emitting element 31G, and a blue light emitting element 31B, which are LED light sources, on a circuit board 32. It has the structure which did. In the case of this embodiment, light emitting elements 31R, 31G, 31B of the same color are arranged in the vertical direction in FIG. 3, and the light emitting element rows of the light emitting elements 31R, 31G, 31B are periodically arranged in the horizontal direction in FIG. It is arranged.

  The illuminating device 30 is a mixture of white light (or each color light as it is) obtained by mixing red light, green light, and blue light emitted from the red light emitting element 31R, the green light emitting element 31G, and the blue light emitting element 31B, respectively. In this state, the light is emitted to the liquid crystal panel 10 as illumination light. The liquid crystal panel 10 emits predetermined color light with controlled luminance in each pixel by transmitting the supplied illumination light while modulating it. As a result, an image is displayed in the display area of the liquid crystal panel 10.

  The optical member 36 has a function of scattering or condensing illumination light emitted from the illumination device 30 and is a member provided as necessary. As a specific configuration of the optical member 36, for example, a structure in which a scattering plate (scattering layer) 33, a first prism sheet 34, and a second prism sheet 35 are stacked can be exemplified.

Note that the arrangement of the light emitting elements shown in FIG. 2 is merely an example, and it is needless to say that other arrangement forms may be used. For example, the row of the green light emitting elements 31G arranged between the row of the red light emitting elements 31R and the row of the blue light emitting elements 31B is arranged with a half pitch shift with respect to the row of the red light emitting elements 31R and the blue light emitting elements 31B. It can also be an array. Alternatively, the red light emitting element 31R, the green light emitting element 31G, and the blue light emitting element 31B may be arranged in a delta arrangement in which they are arranged at equal intervals.
Furthermore, the ratio of the number of installed red light emitting elements 31R, green light emitting elements 31G, and blue light emitting elements 31B may be varied. For example, a Bayer arrangement in which a relatively large number of green light emitting elements 31G are arranged may be employed.

  Here, FIG. 3 is a graph showing the radiation intensity distribution of the illumination device 30. As shown in FIG. 3, the illuminating device 30 of this embodiment has a different radiation intensity distribution for each color light. Specifically, in the region where the polar angle is large, the radiant intensity of blue light is relatively large and the radiant intensity of red light is relatively small.

  The illuminating device 30 having the radiation intensity distribution shown in FIG. 3 can be realized by, for example, a configuration including the light emitting element 31a shown in FIGS. 4 (a) and 4 (b). 4A is a plan view of the light emitting element 31a, and FIG. 4B is a cross-sectional view taken along the line A-A 'shown in FIG.

  The light emitting element 31a includes an LED chip 131a, a first sealing material 131b for sealing the LED chip 131a, and four second sealing materials 131c provided on the surface of the first sealing material 131b. Have. The LED chip 131a is a semiconductor element that emits one of red, green, and blue color light, and is disposed at the bottom of the first sealing material 131b. As shown in FIG. 4A, the second sealing material 131c is disposed so as to surround the four sides of the LED chip 131a. Note that the material of the sealing material includes epoxy resin, acrylic, silicon, or a polymer material obtained by combining the above materials.

  As shown in FIG. 4B, among the colored light emitted from the LED chip 131a toward the top of the first sealing material 131b, a part of the light L1 is the top of the first sealing material 131b and the vicinity thereof. The other part of the light L2 emitted from the light enters the second sealing material 131c formed on the surface of the first sealing material 131b, passes through the second sealing material 131c, and passes through the second sealing material 131c. The outside is injected.

  In the light emitting element 31a having such a configuration, it is possible to control the radiation intensity distribution of the colored light emitted from the light emitting element 31a by adjusting the refractive indexes of the first and second sealing materials 131b and 131c. is there. For example, if the refractive index of the second sealing material 131c is smaller than the refractive index of the first sealing material 131b, the traveling direction of the light L2 incident on the second sealing material 131c is changed from the LED chip 131a. It can be directed outward from the straight traveling direction, and the radiation intensity in a region having a large polar angle can be increased. Therefore, by using the light emitting element 31a having the above configuration for the blue light emitting element 31B, a light emitting element that emits blue light (B) having a relatively wide radiation intensity distribution can be obtained. An intensity distribution can be realized.

  On the other hand, when the radiation intensity in a region having a large polar angle is relatively low, the second sealing material 131c is formed using a material having a refractive index larger than that of the first sealing material 131b. Good. By setting it as such a structure, the red light emitting element 31R corresponding to red light (R) is realizable using the light emitting element 31a, for example.

  Note that it is not necessary to use the light emitting elements 31a shown in FIGS. 4A and 4B for all of the light emitting elements 31R, 31G, and 31B constituting the lighting device 30, and the second sealing material 131c is formed. Ordinary light emitting elements that are not used may be mixed. For example, the light emitting element 31a may be used only for the blue light emitting element 31B that requires a wide radiation intensity distribution, and the other red light emitting element 31R and green light emitting element 31G may be light emitting elements having a normal configuration.

  In FIG. 4A, the second sealing material 131c is scattered at four locations on the first sealing material 131b. However, the configuration is not limited to this, and the second sealing material 131c The number of formation locations can be increased or decreased, and the second sealing material 131c can be formed in a ring shape. With these configuration changes, the radiation intensity distribution of each light emitting element can be easily adjusted.

  Moreover, as a light emitting element which comprises the illuminating device 30, the thing of the structure shown in FIG.4 (c) is applicable. A light emitting element 31b shown in FIG. 4C is a white LED in which a red LED chip 41R, a green LED chip 41G, and a blue LED chip 41B are mounted on a circuit board 45, and these color lights are mixed and emitted. It is. The LED chips 41R, 41G, and 41B are sealed with different sealing materials 42R, 42G, and 42B, respectively. The shape of the sealing materials 42R, 42G, and 42B can be the same as that of the first sealing material 131b shown in FIGS. 4A and 4B, for example. It can be appropriately changed according to the design.

In the light emitting element 31b having the above-described configuration, the LED chips 41R, 41G, and 41B of the respective colors are sealed using different sealing materials 42R, 42G, and 42B, so that the structure of the sealing materials 42R, 42G, and 42B By adjusting the refractive index, a different radiation intensity distribution for each color can be easily obtained.
In FIG. 4C, the sealing materials 42R, 42G, and 42B are arranged corresponding to the chips of each color, but it is needless to say that a common sealing material may be provided for the two LED chips. . Moreover, the LED chip of each color which comprises white LED is not restricted to the combination of red, green, and blue.

In addition, the light-emitting element 31c illustrated in FIG. Like the light emitting element 31a, the light emitting element 31c includes the first sealing material 131b and the second sealing material 131c, but the top of the first sealing material 131b is a flat surface. A dome-shaped second sealing material 131c is provided on the flat surface. The LED chip 131a and the second sealing material 131c are arranged at positions that overlap in a plan view.
In the light emitting element 31c, the radiation intensity distribution can be adjusted by the shape and refractive index of the second sealing material 131c arranged in front of the light emitting element 131a. For example, by forming the second sealing material 131c using a material having a refractive index larger than that of the first sealing material 131b, the second sealing material 131c is injected through the second sealing material 131c. The light L2 can be emitted outward.

Based on the viewing angle characteristics of the liquid crystal panel 10, the radiation intensity distribution of the lighting device 30 described above is set so as to compensate for display coloring in a region where the polar angle is large. For example, when the display mode or the like of the liquid crystal panel 10 is different, the viewing angle characteristics are also different. Therefore, the radiation intensity distribution of the illumination device 30 is set according to each viewing angle characteristic.
Hereinafter, the case where the VA (vertical alignment) mode liquid crystal panel 10 is provided and the case where the FFS (Fringe Field Switching) lateral electric field mode liquid crystal panel 10 is provided will be described in detail.

[VA mode]
FIG. 5 is a plan view showing a schematic configuration of pixels in the VA mode liquid crystal panel 10.
The liquid crystal panel 10 shown in FIG. 5 is an MVA (Multi-Domain Vertical Alignment) type liquid crystal panel. In the display area of the liquid crystal panel 10, a rectangular pixel electrode 16 and a plurality of ridges 21 a and ridges 22 a having a zigzag shape in plan view are formed. Of the ridges 21 a and 22 a, the ridge 21 a whose ridge line is indicated by a solid line is formed on the pixel electrode 16 of the element substrate 11. On the other hand, the ridges 22 a whose ridge lines are indicated by broken lines are formed on the counter electrode 17 (not shown in FIG. 5) facing the pixel electrode 16 with the liquid crystal layer 50 interposed therebetween.

Here, FIG. 6 is a graph showing the viewing angle characteristics of the VA mode liquid crystal panel 10. FIG. 7 is a diagram showing a distribution of brightness (transmittance) at a polar angle of 0 ° (180 °) in FIG.
FIG. 6 is a graph showing the distribution of display coloring at a polar angle of 80 ° when the liquid crystal panel 10 is brightly displayed using the VA mode liquid crystal panel 10 and an illumination device that emits white light. Specifically, yellow coloring occurs in the dark area in the distribution of FIG. 6, and the coloring is increased particularly at the azimuth angles of 45 °, 135 °, 225 °, and 315 °. As shown in FIG. 7, the display is colored yellow because the change in the transmittance of blue light is particularly large in the polar angle direction of the liquid crystal panel 10, and the blue color is near the polar angle of 50 ° (−50 °). This is because the light transmittance is greatly reduced.

  The illumination device used for measuring the viewing angle characteristics shown in FIGS. 6 and 7 is a conventional illumination device, and a white LED or a cold cathode tube obtained by converting blue light with a phosphor is used as a light source. Is. Since these light sources emit light with a single radiant intensity distribution, the radiant intensity distribution of each color component constituting white light is naturally the same.

  And in the liquid crystal device 100 of this embodiment, the radiation intensity distribution of the illuminating device 30 is set according to the viewing angle characteristic of the liquid crystal panel 10 shown in FIG. That is, as shown in FIG. 3, in a region having a large polar angle where the transmittance of blue light is lower than that of other color lights, the emission intensity of blue light is larger than the emission intensity of other color lights. Is set. Thereby, the brightness of each color light component of the display light emitted from the liquid crystal panel 10 can be made uniform, and coloring caused by viewing angle characteristics can be reduced.

  Furthermore, in the case of the present embodiment, as shown in FIG. 3, the emission intensity of green light is higher than the emission intensity of red light in a region having a large polar angle. Thereby, the difference in transmittance between the red light and the green light shown in FIG. 7 can be compensated, and the coloring of the display can be suppressed more effectively.

Further, the viewing angle characteristics shown in FIG. 6 are those when the liquid crystal panel 10 is brightly displayed. When the display is performed with intermediate gradation, as shown in FIG. 8 and FIG. The rate distribution changes. FIG. 8 is a diagram showing a distribution of brightness (transmittance) in a bright intermediate gradation (gray display) and FIG. 9 is a dark intermediate gradation (gray display).
In the case of the liquid crystal panel 10 in the VA mode, the graph shape of the transmittance distribution changes between gradations, but the blue light transmittance tends to be the lowest and the red light transmittance tends to be the highest in the region where the polar angle is large. The same is true regardless of the gradation. Therefore, by providing the illumination device 30 having the radiation intensity distribution shown in FIG. 3, it is possible to reduce display coloring in a wide range of gradations.

[Horizontal electric field mode]
Next, FIG. 10 is a partial plan view showing a schematic configuration of pixels in the FFS-type lateral electric field mode liquid crystal panel 10. As shown in FIG. 10, in the pixel region of the liquid crystal panel 10, a pixel electrode 16s having a stripe shape in plan view and a common electrode 16c formed in the planar region including the pixel electrode 16s are formed. Both the pixel electrode 16s and the common electrode 16c are formed on the liquid crystal control layer 21 of the element substrate 11, and an insulating layer is formed between the two electrodes. In FIG. 10, the transmission axis 60a of the polarizing plate 6a and the transmission axis 60b of the polarizing plate 6b are shown as arrows.
In the liquid crystal panel 10 having the pixel configuration shown in FIG. 10, the counter electrode 17 of the counter substrate 12 may not be formed.

  In this example, the alignment film formed on the liquid crystal control layer 21 of the element substrate 11 and the alignment film formed on the liquid crystal control layer 22 of the counter substrate 12 are both in a direction parallel to the transmission axis 60b of the polarizing plate 6b. It has been rubbed. Accordingly, the liquid crystal molecules 51 constituting the liquid crystal layer 50 are aligned in parallel along the transmission axis 60b of the polarizing plate 6b as shown in the figure in a state where no voltage is applied to the pixel electrode 16s. When a voltage is applied to the pixel electrode 16s, the pixel electrode 16s rotates in the direction indicated by the arrow in accordance with the strength of the electric field formed between the pixel electrode 16s and the common electrode 16c.

FIG. 11 is a diagram illustrating the viewing angle characteristics of the FFS-type liquid crystal panel 10.
In the case of the FFS type liquid crystal panel 10, unlike the VA mode liquid crystal panel, the display color is different depending on the azimuth angle. Specifically, in a range of azimuth angles of 0 ° to 90 ° and 180 ° to 270 ° (region C in FIG. 11), the white display looks bluish (in a color close to cyan). On the other hand, in the ranges of azimuth angles of 90 ° to 180 ° and 270 ° to 360 ° (region Y in FIG. 11), the white display appears yellow.

  That is, in the region C (azimuth angle 0 ° to 90 °, 180 ° to 270 °), the decrease in the transmittance of red light in the region where the polar angle is large is larger than other color lights, and the region Y (azimuth angle 90 °). (~ 180 °, 270 ° -360 °), the decrease in the transmittance of blue light in the region where the polar angle is large is larger than in other color lights.

As the illuminating device 30 combined with the liquid crystal panel 10 having the viewing angle characteristics shown in FIG. 11, a configuration in which the radiant intensity distribution of each color light differs according to the azimuth angle is used.
Specifically, in the illuminating device 30, the radiant intensity distribution in the direction of the azimuth angle 45 ° (224 °) has red light (R), as shown in FIG. The distribution is such that the radiation intensity decreases in the order of green light (G) and blue light (B). On the other hand, as shown in FIG. 12B, the radiant intensity distribution in the direction of the azimuth angle 135 ° (315 °) is blue light (B), green light (G), red, in a region where the polar angle is large. The distribution is set such that the radiation intensity decreases in the order of light (R).

  The illumination device 30 having the radiation intensity distribution shown in FIG. 12 can also be realized using the light emitting element 31a shown in FIG. In the light emitting element 31a, the position and shape of the second sealing material 131c formed on the surface of the first sealing material 131b can be freely adjusted. For example, in the light emitting element 31a that emits blue light, the liquid crystal panel In the light emitting element 31a that emits red light, the second sealing material 131c having a low refractive index is formed at positions corresponding to the azimuth angle of 135 ° and the azimuth angle of 315 °, respectively. The second sealing material 131c having a low refractive index may be formed at a position corresponding to ° and an azimuth angle of 225 °.

  In the embodiment described above, the radiant intensity distribution of each color light is made different depending on the configuration of the light emitting elements constituting the illuminating device 30, but illumination is performed by the optical member 36 provided on the liquid crystal panel 10 side of the illuminating device 30. The radiation intensity distribution of the device 30 may be controlled.

For example, as shown in FIG. 13A, as the scattering plate 33 included in the optical member 36, dome-shaped scattering members 33R, 33G having different shapes corresponding to the light emitting elements 31R, 31G, 31B of the illumination device 30 are provided. , 33B can be used as the scattering plate 33 having a different scattering angle distribution for each of the light emitting elements 31R, 31G, and 31B. Thus, for example, the scattering member 33B having a large diameter is wider. Light can be emitted in the polar angle range, and illumination light having a different radiation intensity distribution for each color light can be supplied to the liquid crystal panel 10. The dotted curve attached to the scattering members 33R and 33B shows the shape of the scattering member 33G for comparison, and the scattering members 33R and 33B are both formed with a larger diameter than the scattering member 33G. ing. In the scattering members 33R and 33B, only the direction in which the light emission range is desired to be expanded may be increased.
Further, the shapes of the scattering members 33R, 33G, and 33B illustrated are examples.
Further, for example, as shown in FIG. 13B, the scattering plate 33 included in the optical member 36 is configured to include scattering members 33R, 33G, and 33B having different refractive indexes according to the wavelength of incident light. Thus, the emission angle for each color light can be made different.
Regardless of the configuration shown in FIGS. 13A and 13B, by adjusting the shape or refractive index of the scattering members 33R, 33G, and 33B, the radiation intensity distribution shown in FIGS. Illumination light can be produced and can be suitably combined with a vertical alignment mode or lateral electric field mode liquid crystal panel.

(Electronics)
Next, the electronic apparatus of the present invention will be described.
The electronic apparatus of the present invention has the above-described liquid crystal device 100 as a display unit, and specifically, the one shown in FIG. FIG. 14 is a perspective view showing an example of a thin large-screen television.
In FIG. 14, a thin large-screen television 1200 includes a display unit 1201 using the liquid crystal device 100 of the above-described embodiment, a thin large-screen television main body (housing) 1202, and an audio output unit 1203 such as a speaker. .

  Since the electronic device shown in FIG. 14 includes the display unit 1201 including the liquid crystal device 100 of the above-described embodiment, display coloring caused by a difference in viewing angle in the display unit is suppressed, and a high-quality display is obtained. It has become an electronic device.

1 is a cross-sectional view illustrating a schematic configuration of a liquid crystal device according to an embodiment. The partial top view which shows schematic structure of an illuminating device. The figure which shows the radiation intensity distribution of an illuminating device. FIG. 6 illustrates a structure of a light-emitting element. FIG. 6 is a diagram illustrating a pixel configuration of a VA mode liquid crystal panel. The figure which shows the viewing angle characteristic of the liquid crystal panel of VA mode. The figure which shows distribution of the brightness of the liquid crystal panel of VA mode. The figure which shows the brightness distribution in the intermediate gradation of the liquid crystal panel of VA mode. The figure which shows the brightness distribution in the intermediate gradation of the liquid crystal panel of VA mode. FIG. 3 is a diagram illustrating a pixel configuration of an FFS liquid crystal panel. The figure which shows the viewing angle characteristic of the liquid crystal panel of a FFS system. The figure which shows the radiation intensity distribution of the illuminating device combined with the liquid crystal panel of a FFS system. Sectional drawing which shows the structural example of a scattering plate. FIG. 14 illustrates an example of an electronic device.

Explanation of symbols

  100 liquid crystal device, 10 liquid crystal panel, 30 illumination device, 31a, 31b light emitting element, 31R red light emitting element, 31G green light emitting element, 31B blue light emitting element, 33 scattering plate (scattering layer), 36 optical member, 131b first sealing Stop material, 131c Second sealing material

Claims (6)

A liquid crystal device comprising a liquid crystal panel in a vertical alignment mode in which a liquid crystal layer is sandwiched between a pair of substrates, and an illumination device that supplies illumination light to the liquid crystal panel,
The lighting device includes a light source composed of a white LED,
The white LED is
  A plurality of light emitting elements that emit light of different colors,
A first sealing material that is provided for each of the light emitting elements and seals the entire emission surface of the light emitting elements;
A second sealing material having a refractive index different from that of the first sealing material and provided on a part of an emission surface of the first sealing material;
Have
As the polar angle of the radiant intensity distribution of the color light emitted from the illumination device increases, the radiant intensity of blue light becomes larger than the radiant intensity of the other colored lights, so that the first sealing is performed for each color light. Set the shape or refractive index of the stopper and the second sealing material, and compensate the viewing angle characteristics for each display color in the liquid crystal panel,
Liquid crystal device. The refractive index of the second sealing material is made smaller than the refractive index of the first sealing material, and the radiation intensity in the region where the polar angle of the color light emitted from the light emitting element is large is relatively increased. ,
  The refractive index of the second sealing material is made larger than the refractive index of the first sealing material, and the radiation intensity in the region where the polar angle of the colored light emitted from the light emitting element is large is relatively low. And
  Compensating the viewing angle characteristics for each display color in the liquid crystal panel,
  The liquid crystal device according to claim 1. The first sealing material includes a convex shape having a top at a position corresponding to the center of the light emitting element,
The second sealing material is disposed at a position away from the top of the first sealing material by a predetermined distance so as to surround four sides of the light emitting element in a plan view.
  The liquid crystal device according to claim 1. The first sealing material has a convex shape having a top at a position corresponding to the vicinity of the center of the light emitting element, and has a shape in which a flat surface is formed on the top.
  The second sealing material is provided with a dome shape on the flat surface of the first sealing material,
  The liquid crystal device according to claim 1. A light scattering layer is provided on the liquid crystal panel side surface of the illumination device;
The light scattering layer has a scattering distribution that changes a radiation intensity distribution of the color light, and scatters at least two of the color lights at different angular distributions;
The liquid crystal device according to claim 1. An electronic apparatus comprising the liquid crystal device according to claim 1.

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