JP2006267783A - Electro-optic device, lighting system and electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electro-optic device which prevents the generation of moire, is excellent in a display grade, a lighting system and an electronic device having the electro-optic device. <P>SOLUTION: Since the electro-optic device has a liquid crystal panel 2 in which a plurality of pixels 26R, etc. having an optical transmission area V are arranged and a condensing sheet 31 which is provided on the side opposite to a visual recognition side of the liquid crystal panel 2 and has a plurality of projected parts 36 in width q (width q between light shielding layers 22) of the optical transmission area V of the pixel 26R, etc. and width p are joined, for example, superficial area of the projected part 36 can be made to be the same by every pixel 26R, 26G and 26B, intensity of light which transmits the optical transmission area V of the pixels 26R, 26G and 26B is made to be the same by every pixel 26R, 26G and 26B, for example, generation of light and darkness is prevented, generation of the moire, etc. depending on the condensing sheet 31 is prevented to enhance the display grade in comparison with the case that the intensity of light which transmits the optical transmission area V of the pixels 26R, 26G and 26B is different by every pixel. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to electronic devices such as personal computers and mobile phones, and to illumination devices and electro-optical devices used in these electronic devices.

  Conventionally, a liquid crystal device or the like is used as a display device of an electronic device such as a personal computer or a mobile phone. This liquid crystal device includes, for example, a light source that emits light, a light guide plate that guides light from the light source, a prism sheet having a plurality of prisms on one side, and a liquid crystal panel that holds liquid crystal. Since the prism shape of these prism sheets is, for example, a triangular prism, the light condensing action is only in a one-dimensional direction, and the two-dimensional direction is not considered, and a high-luminance display device that efficiently uses light is obtained. There was a problem that it was not possible.

In order to solve this problem, a technique is disclosed in which the prism sheet is shaped like a cone having one or more slopes. (For example, refer to Patent Document 1).
JP-A-6-308485 (paragraph [0007], FIG. 1).

  However, although the above-described technique can provide a high-luminance display device, the prism sheet is provided without considering the position of each prism of the prism sheet with respect to the pixels of the liquid crystal panel. There is a problem that the amount of transmitted light differs for each pixel, and moire occurs depending on the prism sheet, resulting in a reduction in display quality.

  SUMMARY An advantage of some aspects of the invention is that it provides an electro-optical device, an illuminating device, and an electronic apparatus including the electro-optical device that are excellent in display quality by preventing generation of moire. .

  In order to achieve the above object, an electro-optical device according to a main aspect of the present invention includes an electro-optical panel in which a plurality of pixels having at least a light transmission region are arranged, and a side opposite to a viewing side of the electro-optical panel. A light collecting sheet that is provided and has a plurality of protrusions formed by combining the width and width of the light transmission region of the pixel, a light guide plate that emits light to the light collection sheet, and a light source that emits light to the light guide plate It is characterized by comprising.

  In the present invention, an electro-optical panel in which a plurality of pixels having at least a light transmission region are arranged, and a protrusion formed by matching the width and width of the light transmission region of the pixel are provided on the side opposite to the viewing side of the electro-optical panel. A light-condensing sheet having a plurality of portions, a light guide plate that emits light to the light condensing sheet, and a light source that emits light to the light guide plate, so that, for example, the surface area of the protrusions is the same for each pixel The amount of light transmitted through the light transmission region of the pixel can be the same for each pixel, and depends on, for example, the light collecting sheet, compared to the case where the amount of light transmitted through the light transmission region of the pixel is different for each pixel. Generation of moire or the like can be prevented and display quality can be improved.

  According to one form of this invention, the said protrusion is provided with this adjacent protrusion continuously, It is characterized by the above-mentioned. As a result, since the adjacent protrusions are continuously provided in the protrusion, for example, the light-collecting sheet can be easily manufactured and the cost can be reduced. Even if it occurs, for example, the surface area of the protrusion can be made the same for each pixel, and the amount of light transmitted through the light transmission region of the pixel can be made the same for each pixel, such as moire depending on the light collecting sheet Can be prevented and display quality can be improved.

  According to an aspect of the present invention, each of the plurality of protrusions is provided corresponding to each of the plurality of pixels. As a result, each of the plurality of protrusions is provided corresponding to each of the plurality of pixels. Therefore, for example, compared to a case where the quadrangular pyramidal protrusions are not provided corresponding to the pixels, The position and surface area of the slope of the weight can be made substantially the same for each pixel, the amount of light transmitted through the light transmission region of the pixel can be made to be the same for each pixel, and moiré can be prevented more reliably. it can.

  According to an aspect of the present invention, the vertex of the protrusion is provided so as to be shifted from the center of the light transmission region of the pixel corresponding to the vertex toward the side closer to the light source. Thereby, the vertex of the protrusion is provided so as to be shifted from the center of the light transmission region of the pixel corresponding to the vertex to the side closer to the light source. Compared with the case where the light source is provided on the farther side, more light from the light source can be directed in a direction orthogonal to the substrate, and the luminance can be further improved and the display quality can be improved.

  According to an aspect of the present invention, the vertex of the protrusion and the center of the light transmission region of the pixel are provided in correspondence with each other. Thereby, since the vertex of the protrusion and the center of the light transmission region of the pixel are provided in correspondence with each other, for example, the surface areas of the four inclined surfaces constituting the vertex of the square weight are equal to each other. Compared with the case where the apex is shifted in the direction intersecting the direction connecting the two, the light can be emitted without being biased in the intersecting direction, and the display quality can be improved.

  According to an aspect of the present invention, the protrusion is a quadrangular pyramid shape. As a result, since the protrusion has a quadrangular pyramid shape, the light incident on the protrusion is efficiently condensed so as to intersect one side of the quadrangle on the bottom surface of the quadrangular pyramid and biased toward the viewing side. In addition, the light collecting sheet can be easily manufactured, so that the cost can be reduced.

  According to an aspect of the present invention, the protrusion has a bowl shape, a circular planar shape, or a trapezoidal cross section. As a result, since the protrusion has a bowl shape, a circular planar shape, or a trapezoidal cross section, for example, when the protrusion has a bowl shape, the light is biased in a direction perpendicular to the bottom surface of the protrusion, for example. By making it possible, the amount of light transmitted through the light transmission region of the pixel can be made the same for each pixel, for example, it is possible to prevent the occurrence of moire or the like depending on the light collecting sheet and improve the display quality, An electro-optical device having a wide viewing angle can be obtained.

  According to one form of this invention, the said condensing sheet | seat has a protruding part in the surface facing the said light-guide plate, It is characterized by the above-mentioned. Thereby, since the condensing sheet has a protruding portion on the surface facing the light guide plate, for example, the light guide plate and the light condensing sheet can be prevented from closely contacting each other, and the light condensing sheet is prevented from being bent, It is possible to prevent Newton rings and the like from occurring due to light interference.

  According to an aspect of the present invention, a plurality of the protrusions are provided along the longitudinal direction of each pixel. Thereby, since a plurality of protrusions are provided for each pixel along the longitudinal direction of the pixel, for example, when the pixel is rectangular, by arranging the square-shaped protrusions in the longitudinal direction, Generation of moire can be prevented in a state where the protrusion is aligned for each pixel. In addition, for example, when a plurality of quadrangular pyramidal protrusions are provided corresponding to each pixel, compared to a case where one quadrangular pyramidal protrusion is provided corresponding to each pixel. The bias of the slope of the protrusion in one pixel can be suppressed, the light unevenness in one pixel can be suppressed, and an electro-optical device with better display quality can be obtained.

  According to an aspect of the present invention, the electro-optical panel includes a pixel electrode provided corresponding to the pixel, and a light-shielding layer overlapping with a part of the pixel electrode, and the pixel includes the pixel The electrode is formed by a region where the light shielding layer does not overlap. Accordingly, the electro-optical panel has a pixel electrode provided corresponding to the pixel and a light shielding layer overlapping with a part of the pixel electrode, and the pixel is formed by a region of the pixel electrode where the light shielding layer does not overlap. Therefore, for example, it is possible to easily adjust the amount of light transmitted through the light transmission region of the pixel by the light shielding layer while preventing the light from intermingling by the light shielding layer.

  An illumination device according to another aspect of the present invention is provided on a side opposite to a viewing side of an electro-optical panel in which a plurality of pixels each having a light transmission region are arranged, and the width and width of the light transmission region of the pixels are A light collecting sheet having a plurality of protrusions combined, a light guide plate that emits light to the light collecting sheet, and a light source that emits light to the light guide plate.

  In the present invention, a collection having a plurality of protrusions provided on the side opposite to the viewing side of the electro-optical panel in which a plurality of pixels having at least a light transmission region are arranged and having the width and width of the light transmission regions of the pixels being matched. Since it includes a light sheet, a light guide plate that emits light to the light collecting sheet, and a light source that emits light to the light guide plate, for example, the surface area of the protrusions can be the same for each pixel, Compared to the case where the amount of light transmitted through the transmission region can be the same for each pixel, and the amount of light transmitted through the light transmission region of the pixel differs for each pixel, for example, generation of moire or the like that depends on the light collecting sheet Can be prevented and display quality can be improved.

  An electronic apparatus according to another aspect of the invention includes the above-described electro-optical device.

  In the present invention, since an electro-optical device capable of preventing the occurrence of moire is provided, an electronic apparatus having excellent display performance can be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description of the embodiments, a liquid crystal device as an electro-optical device, specifically, a transmissive TFT (Thin Film Transistor) active matrix liquid crystal device, and an electronic apparatus using the liquid crystal device Explain, but is not limited to this. Moreover, in the following drawings, in order to make each structure easy to understand, the actual structure and the scale and number of each structure are different.

  (First embodiment)

  FIG. 1 is a schematic perspective view of a liquid crystal device according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line AA of the liquid crystal panel of the liquid crystal device of FIG. 1, and FIG. FIG. 4 is a plan view of the liquid crystal panel of FIG. 1. In FIG. 4, illustration of a substrate 6, a colored layer 21R and the like which will be described later is omitted.

  (Configuration of liquid crystal device)

  The liquid crystal device 1 includes a liquid crystal panel 2, a circuit board 3 connected to the liquid crystal panel 2, and an illumination device 4 that emits light to the liquid crystal panel 2. The liquid crystal device 1 is provided with other auxiliary mechanisms such as a frame (not shown) that supports the liquid crystal panel 2 as necessary.

  The liquid crystal panel 2 includes a substrate 5, a substrate 6 provided so as to face the substrate 5, a sealing material 7 provided between the substrates 5 and 6, and a liquid crystal (not shown) sealed by the substrates 5 and 6. It has. For example, TN (Twisted Nematic) is used for the liquid crystal.

  The substrate 5 and the substrate 6 are plate-like members made of a light-transmitting material such as glass or synthetic resin.

  On the liquid crystal side of the substrate 5, as shown in FIG. 1, a gate electrode 8, a source electrode 9, a thin film transistor element T, and a pixel electrode 10 are formed.

  As shown in FIG. 1, the gate electrode 8 is formed in the X direction, and the source electrode 9 is formed in the Y direction, for example, by a metal material such as aluminum. The source electrode 9 is formed, for example, as shown in FIG. 1, with the upper half routed to the left side and the lower half routed to the right side. Note that the numbers of the gate electrode 8 and the source electrode 9 can be appropriately changed according to the resolution of the liquid crystal device 1 and the size of the display area.

  The thin film transistor element T includes three terminals that are electrically connected to the gate electrode 8, the source electrode 9, and the pixel electrode 10, respectively. The thin film transistor element T is electrically connected to the pixel electrode 10, the gate electrode 8, and the source electrode 9. Thereby, when a voltage is applied to the gate electrode 8, a current flows from the source electrode 9 to the pixel electrode 10 or vice versa.

  The pixel electrode 10 has a substantially rectangular shape as shown in FIG. 4, and is arranged in the X and Y directions on the liquid crystal side surface of the substrate 5 as shown in FIGS. As shown in FIG. 2, an alignment film 11 is provided on the liquid crystal side surface of the pixel electrode 10 and the substrate 5. The surface on the liquid crystal side of the alignment film 11 is rubbed.

  The substrate 5 includes a region (hereinafter referred to as “projected portion”) 5 a that projects from the outer peripheral edge of the substrate 6. Driver ICs 12, 13 and 14 for driving the liquid crystal are mounted on the surface of the projecting portion 5a. Wirings 15, 16, and 17 are provided so as to be drawn out from connection terminals that are electrically connected to bumps (not shown) of the driver ICs 12, 13, and 14 via an ACF (Anisotropic Conductive Film), respectively. The wiring 15 is electrically connected to the gate electrode 8, and the wirings 16 and 17 are electrically connected to the source electrode 9. Wirings 18, 19 and 20 are provided so as to be drawn from connection terminals (not shown) on the input side of the driver ICs 12, 13 and 14.

  On the other hand, as shown in FIG. 2, for example, a red colored layer 21R, a green colored layer 21G, a blue colored layer 21B, and these colored layers 21R are laminated on the surface of the substrate 6 on the liquid crystal side. The light shielding layer 22, the flattening layer 23 having a flat surface, the common electrode 24 provided on the liquid crystal side of the flattening layer 23, and the alignment film 25 covering the common electrode 24 are provided. The pixels 26R, 26G, and 26B are provided between the light shielding layers 22 corresponding to coloring layers 21R, 21G, and 21B and the pixel electrode 10 described later. In the liquid crystal panel 2, as shown in FIG. 4, a plurality of pixels 26R, 26G, and 26B are arranged in the X direction and the Y direction. For example, the regions that do not overlap the light shielding layer 22 are the pixels 26R, 26G, and 26B, and the pixels 26R, 26G, and 26B include a light transmission region V having substantially the same shape as the pixel electrode 10. For example, a light shielding layer may overlap with the outer peripheral edge of the pixel electrode 10, and a portion where the light shielding layer does not overlap the pixel electrode 10 may be a pixel.

  The colored layers 21R, 21G, and 21B display, for example, red, green, and blue, respectively. For example, the colored layer 21R and the colored layer 21G are adjacent to each other, and the colored layer 21G and the colored layer 21B are adjacent to each other. It is provided on the side surface. For the material of each of the colored layers 21R, 21G, and 21G, for example, a photosensitive resin colored with a pigment is used.

  As shown in FIG. 2, the light shielding layer 22 is formed by laminating adjacent colored layers 21R, 21G, and 21B. As shown in FIG. 2, for example, the width in the X direction in which the adjacent colored layer 21R and the colored layer 21G are stacked is set to a width a. For example, the width q between the light shielding layers 22 is set so as to match the width p of a projection 36 described later of the light collecting sheet 31. The light shielding layer 22 is provided in a lattice shape as shown in FIG. 4, for example, in a direction along the source electrode 9 when seen in a plan view.

  As shown in FIG. 2, the planarizing layer 23 is provided on the liquid crystal side of the colored layers 21R, 21G, and 21B and the light shielding layer 22, and the surface on the liquid crystal side of the planarizing layer 23 is flat. For example, a transparent resin material is used as the material of the planarizing layer 23.

  The common electrode 24 is provided on the liquid crystal side surface of the planarizing layer 23, and a transparent conductor such as ITO (Indium Tin Oxide) is used as a constituent material.

  The alignment film 25 is provided so as to cover the liquid crystal side surface of the common electrode 24, and the liquid crystal side surface of the alignment film 25 is subjected to rubbing treatment.

  As shown in FIG. 1, the circuit board 3 is connected to the protruding portion 5 a through, for example, an adhesive. The circuit board 3 is mounted on the flexible base material 27 in order to control the flexible base material 27, the output wiring 28 provided on the flexible base material 27, the input wiring 29, the driver IC 12, and the like. And a semiconductor element 30.

  For example, a semiconductor element 30 is mounted on the flexible base material 27, and in addition to this, a semiconductor element for power supply (not shown) is mounted.

  As shown in FIG. 1, the output wiring 28 is routed, for example, in the X direction, and one end of the output wiring 28 is connected via a connection member provided in a hole formed in the flexible base material 27 (not shown). And electrically connected to the end of the wiring 18 by ACF or the like. For example, the other end of the output wiring 28 is connected to a terminal (not shown) of the semiconductor element 30 by soldering.

  As shown in FIG. 1, the input wiring 29 is routed in the X direction, for example. One end of the input wiring 29 is connected to, for example, a terminal of the semiconductor element 30 (not shown) by soldering.

  The semiconductor element 30 is, for example, a SON (Small Outline Nonlead) package, a CSP (Chip Scale Package), or the like, and includes a plurality of terminals not shown on the surface mounted on the flexible substrate 27.

  As shown in FIG. 2, the illuminating device 4 includes a light collecting sheet 31 provided on the opposite side of the substrate 5 from the substrate 6 side and a diffusion sheet 32 provided so as to sandwich the light collecting sheet 31 between the substrate 5. A light guide plate 33 provided so that the diffusion sheet 32 is sandwiched between the light collecting sheet 31, a light source 34 provided so that light can be incident on the light guide plate 33, and the diffusion sheet 32. And a reflection sheet 35 provided so as to sandwich 33.

  As shown in FIG. 2, the light collecting sheet 31 is provided on the side opposite to the viewing side of the liquid crystal panel 2 (the substrate 6 side of the liquid crystal panel 2 in the Z direction). As shown in FIGS. 2 and 3, the light collecting sheet 31 includes a plurality of quadrangular pyramid-shaped (pyramidal) protrusions 36 arranged in the X direction and the Y direction. Adjacent protrusions 36 are provided continuously. The shape of the bottom surface of the protrusion 36 is, for example, a square, and the vertex O of the protrusion 36 is provided at the approximate center of the bottom surface of the protrusion 36 as shown in FIG. As shown in FIG. 4, the protrusion 36 includes four inclined surfaces 36a, 36b, 36c, and 36d that are inclined on the bottom surface of the protrusion 36. The areas of the slopes 36a to 36d are, for example, the same.

  The width p in the X direction of the protrusion 36 is set to match the width q in the X direction of the light shielding layer 22 (light transmission region V) shown in FIG. Further, the width p in the Y direction of the protrusion 36 is set to match the width q in the Y direction of the light shielding layer 22 (light transmission region V). As shown in FIGS. 2 and 4, the vertex O1 of the protrusion 36A of the light collecting sheet 31 is provided at the center between the light shielding layers 22 forming the pixels 26R (the center of the pixel electrode 10 and the center of the light transmission region V). The apex O2 of the protrusion 36B provided next to the protrusion 36A in the X direction is shifted from the center of the light shielding layer 22 forming the pixel 26G (the center of the pixel electrode 10) in the X direction. The vertex O3 of the protrusion 36C provided next to the protrusion 36A in the Y direction is provided to be shifted in the Y direction from the center between the light shielding layers 22 forming the pixel 26R2 (the center of the pixel electrode 10). Similarly, the apexes of the other protrusions 36 are also provided so as to be shifted in the X direction and the Y direction, for example.

  As shown in FIG. 4, when the projection 36 is viewed in plan, the condensing sheet 31 has a total area of the slopes 36a, 36b, 36c and 36d of the projection 36 for each of the pixels 26R, 26G and 26B. It is the same. For example, when viewed in the X direction, as shown in FIG. 4, the area of the slope 36a of the protrusion 36A provided in the pixel 26R and the sum of the slope 37a and the slope 37b of the protrusion 36B provided in the pixel 26G are as follows. It is almost the same. When viewed in the Y direction, as shown in FIG. 4, the area of the slope 36c of the protrusion 36A and the sum of the slope 37c and the slope 37d of the protrusion 36C provided on the pixel 26R (26R2) are substantially the same. It has become.

  The diffusion sheet 32 is used for diffusing light from a light guide plate 33 to be described later and emitting it uniformly to the liquid crystal panel 2.

  The light guide plate 33 is used to uniformly guide light from a light source 34 described later to the entire surface of the diffusion sheet 32, for example. As a constituent material of the light guide plate 33, for example, an acrylic resin or the like is used.

  The light source 34 is provided on the flexible substrate 27 so that light can be emitted to the light receiving surface of the light guide plate 33, for example, and is used to emit light to the liquid crystal panel 2 side. As the light source 34, for example, an LED (Light Emitting Diode) or the like is used.

  The reflection sheet 35 is used to reflect the light emitted from the light source 34 to the liquid crystal panel 2 side. For example, white PET (Polyethylene terephthalate) is used for the reflection sheet.

  (Manufacturing method of liquid crystal device)

  Next, a method for manufacturing the liquid crystal device 1 will be described with reference to the drawings.

  FIG. 5 is a flowchart showing manufacturing steps of the liquid crystal device 1 according to the first embodiment. In the present embodiment, the manufacturing process (S1) of the liquid crystal panel 2, the manufacturing process (S2) of the circuit board 3, and the connecting process (S3) of the liquid crystal panel 2 and the circuit board 3 are the same as those in the publicly known technology. The manufacturing process on the lighting device 4 side will be mainly described.

  First, as shown in FIG. 2, a condensing sheet 31 is provided so as to face the substrate 5 of the liquid crystal panel 2 (S4). At this time, for example, as shown in FIGS. 2 and 4, the vertex O <b> 1 of the protrusion 36 is positioned at the center in the X direction and Y direction between the light shielding layers 22 forming the pixel 26 </ b> R.

  Then, the reflection sheet 35 is provided so as to overlap the light guide plate 33, and the light source 34 provided on the flexible base 27 is connected to the flexible base so that the light from the light source 34 enters the light receiving surface of the light guide plate 33. The liquid crystal device 1 is manufactured by connecting the material 27 to the reflection sheet 35 (S5).

  This is the end of the description of the method for manufacturing the liquid crystal device 1.

  As described above, according to the present embodiment, the liquid crystal panel 2 in which a plurality of pixels 26R and the like having the light transmission region V are arranged, and the light transmission region of the pixel 26R and the like are provided on the side opposite to the viewing side of the liquid crystal panel 2. Since the condensing sheet 31 includes a plurality of protrusions 36 in which the width q of V (the width q between the light shielding layers 22) and the width p are combined, for example, the surface area of the protrusions 36 is the pixels 26R, 26G, and 26B. The amount of light transmitted through the light transmission region V of the pixels 26R, 26G, and 26B can be the same for each of the pixels 26R, 26G, and 26B, and the light of the pixels 26R, 26G, and 26B can be made the same. Compared with the case where the amount of light transmitted through the transmissive region V is different for each pixel, for example, the occurrence of light and darkness can be prevented, the occurrence of moire or the like depending on the light collecting sheet 31 can be prevented, and the display quality can be improved.

  Moreover, since the protrusion 36 is provided with the adjacent protrusions 36 continuously, for example, the light collecting sheet 31 can be easily manufactured and the cost can be reduced. Even if misalignment occurs, for example, the surface area of the protrusion 36 can be made the same for each of the pixels 26R, 26G, and 26B, and the amount of light transmitted through the light transmission region V of each of the pixels 26R, 26G, and 26B can be changed. It can be made the same for each of 26G and 26B, and the generation of moire or the like depending on the light collecting sheet 31 can be prevented and the display quality can be improved.

  Further, since the projections 36 of the light collecting sheet 31 have a quadrangular pyramid shape, the light incident from the light source 34 side on the projections 36 shown in FIG. The liquid crystal device 1 having high brightness can be obtained by being biased toward the viewer side.

  Further, since the vertex O of the projection 36 and the center of the pixel 26R (light transmission region V thereof) and the like are provided correspondingly, for example, the areas of the four inclined surfaces 36a to 36d constituting the vertex O are equal. Compared with the case where the vertex O is shifted in the Y direction intersecting the X direction connecting the light source 34 and the protrusion 36, the light can be emitted without being biased in the Y direction, and the display quality is improved. Can be made.

  (Second Embodiment)

  Next, a liquid crystal device according to a second embodiment of the present invention will be described. In addition, in embodiment after this embodiment, the same code | symbol is attached | subjected to the same structural member as the said embodiment, the description is abbreviate | omitted, and it demonstrates centering on a different location.

  6 is a cross-sectional view of the liquid crystal panel of the liquid crystal device of the second embodiment, FIG. 7 is a plan view of a condensing sheet used in the liquid crystal panel of the liquid crystal device of FIG. 6, and FIG. 8 is a plan view of the liquid crystal panel of FIG. FIG. In FIG. 8, the substrate 6, the colored layer 21R, and the like are not shown.

  In the first embodiment, for example, as shown in FIG. 2, the width q between the light shielding layers 22 forming the pixels 26 </ b> R and the like is matched with the width p of the protrusion 36 of the light collecting sheet 31. In the example shown in FIG. 6, the vertexes O2 and the like of the projections 36 are shifted from the center of the pixels 26R and the projections 36 are continuously provided. The illumination device 41 is provided instead of the illumination device 4, and projections 43 of a light collecting sheet 42, which will be described later, of the illumination device 41 are provided corresponding to the pixels 26R, 26G, and 26B, respectively.

  As shown in FIG. 6, the illuminating device 41 includes a diffusion sheet 32 provided so that the light collection sheet 42 is sandwiched between the light collection sheet 42 provided on the side opposite to the viewing side of the liquid crystal panel 2 and the substrate 5. A light guide plate 33 provided so as to sandwich the diffusion sheet 32 between the light collecting sheet 42, a light source 34 provided so that light can enter the light guide plate 33, and the light diffusion plate 32. And a reflection sheet 35 provided so as to sandwich 33.

  As shown in FIGS. 6 and 7, the light collecting sheet 42 includes a plurality of quadrangular pyramid-shaped (pyramidal) protrusions 43 arranged in the X direction and the Y direction. The shape of the bottom surface of the protrusion 43 is, for example, a square, and the vertex O of the protrusion 43 is provided substantially at the center of the bottom surface of the protrusion 43 as shown in FIG. The protrusions 43 adjacent to each other in the X direction and the Y direction are provided to be separated from each other in the X direction and the Y direction by a width a so as to match the width a of the light shielding layer 22. As shown in FIG. 7, the protrusion 43 includes four inclined surfaces 43 a, 43 b, 43 c, and 43 d that are inclined on the bottom surface of the protrusion 43. The areas of the slopes 43a to 43d are, for example, the same.

  The width p in the X direction of the protrusion 43 is set to match the width q in the X direction between the light shielding layers 22 (the width in the X direction of the light transmission region V). Further, the width p in the Y direction of the protrusion 43 is set to match the width q in the Y direction between the light shielding layers 22 (the width in the Y direction of the light transmission region V). As shown in FIGS. 6 and 8, the vertex O4 of the projection 43A of the light collecting sheet 42 and the vertex O5 of the projection 43B provided adjacent to the projection 43A in the X direction are light-shielding that forms the pixels 26R and 26G, respectively. It is provided at the center between the layers 22 (the center of the pixel electrode 10 and the center of the light transmission region V). Similarly, the vertices of the other protrusions 43 are also provided, for example, at approximately the center of the corresponding pixel. The flat portion 45 having the width a shown in FIG. 7 of the light collecting sheet 42 is provided corresponding to the light shielding layer 22 as shown in FIG.

  In the present embodiment, the example in which the light collecting sheet 42 includes the flat portion 45 has been described. However, for example, the adjacent inclined surfaces of the adjacent protrusions without the flat portion 45 are interposed through the substantially U-shaped portion. May be provided.

  When the projection 43 is viewed in plan as shown in FIG. 8, the light collecting sheet 42 has the same total area of the slopes 43a to 43d of the projection 43 for each of the pixels 26R, 26G, and 26B. Yes.

  As described above, according to the present embodiment, since the protrusions 43 of the light collecting sheet 42 are provided corresponding to the light transmission regions V of the pixels 26R, 26G, and 26B, for example, the width of the protrusion 43 is the pixel 26R. , 26G and 26B, the positions of the slopes 43a and the like of the square pyramids and the surface area of the protrusion 43 are substantially the same for each of the pixels 26R, 26G and 26B. The amount of light transmitted through the light transmission region V of the pixels 26R, 26G, and 26B can be the same for each of the pixels 26R, 26G, and 26B, and the occurrence of moire can be prevented more reliably. it can.

  Further, since the vertexes O4 and the like of the protrusions 43 and the centers of the light transmission regions V of the pixels 26R, 26G, and 26B are provided in correspondence with each other, for example, the surface areas of the four inclined surfaces that constitute the vertexes O4 and the like of the square pyramids. Compared to the case where the vertices are shifted in the Y direction intersecting the X direction connecting the light source 34 and the protrusion 43, the light can be emitted without being biased in the Y direction, and the display quality can be improved. Can be improved.

  (First modification)

  Next, a liquid crystal device of a first modification according to the present invention will be described with reference to the drawings.

  FIG. 9 is a plan view of a liquid crystal panel of a liquid crystal device of a first modification, and FIG. 10 is a plan view of a light collecting sheet used in the liquid crystal device of FIG.

  In the first embodiment, for example, as shown in FIG. 2, the width q between the light shielding layers 22 forming the pixels 26 </ b> R and the like is matched with the width p of the protrusion 36 of the light collecting sheet 31. In FIG. 9, the liquid crystal device 50 according to the present modification has projections 52 of a light collecting sheet 51, which will be described later, in pixels 26R, 26G, and 26B. A plurality of pixels are provided along the longitudinal direction (Y direction) of each pixel 26R, 26G, and 26B for each pixel pixel 53 (described later in FIG. 9).

  In the liquid crystal panel, a plurality of pixels 26R, 26G, and 26B are arranged in the X direction and the Y direction. For example, the regions that do not overlap with the light shielding layer 22 are the pixels 26R, 26G, and 26B, and the pixels 26R, 26G, and 26B include a rectangular light transmission region that is substantially the same as the pixel electrode 53. For example, the light shielding layer may overlap with the outer peripheral edge of the pixel electrode 53, and a portion where the light shielding layer does not overlap with the pixel electrode 53 may be a pixel.

  As shown in FIG. 10, the light collecting sheet 51 includes a plurality of quadrangular pyramid-shaped (pyramidal) protrusions 52 arranged in the X direction and the Y direction. As shown in FIG. 10, a plurality of (for example, two) protrusions 52 are provided spaced apart by a width a in the Y direction, and one protrusion 52 is provided separated by a width a in the X direction. The shape of the bottom surface of the protrusion 52 is, for example, a square, and the vertex O of the protrusion 52 is provided at substantially the center of the bottom surface of the protrusion 52 as shown in FIG. As shown in FIG. 10, the protrusion 52 includes four inclined surfaces 52 a, 52 b, 52 c, and 52 d that are inclined on the bottom surface of the protrusion 52. The flat portion 54 having the width a shown in FIG. 10 of the light collecting sheet 51 is provided corresponding to the light shielding layer 22.

  The width p in the Y direction of the protrusion 52 of the light collecting sheet 51 is set to match half of the width s between the light shielding layers 22 in the Y direction (the length in the Y direction of the pixel electrode 53) as shown in FIG. Thus, the width p in the X direction of the protrusion 52 is set to match the width q in the X direction between the light shielding layers 22 (the length of the pixel electrode 53 in the X direction). As shown in FIG. 9, the vertex O6 of the projection 52A of the light collecting sheet 51 and the vertex O7 of the projection 52B provided adjacent to the projection 52A in the Y direction are Y of the rectangular pixel electrode 53 that is long in the Y direction. It is provided at the approximate center of each of the two regions divided in the direction. Similarly, the vertices of the other protrusions 52 are provided at substantially the center of each of the regions of the corresponding pixel electrode 53 divided into two in the Y direction. As shown in FIG. 9, when the projection 52 is viewed in plan, the condensing sheet 51 has a total area of the slopes 52a, 52b, 52c and 52d of the projection 52 for each of the pixels 26R, 26G and 26B. It is the same.

  In the present modification, as shown in FIG. 10, two protrusions 52 are provided apart from each other by a width a in the Y direction, and one protrusion 52 is provided from each other by a width a in the X direction. However, the number of these is not limited and can be appropriately changed according to the size of the pixel electrode 53.

  As described above, according to the present modification, a plurality of protrusions 52 of the light collecting sheet 51 are provided, for example, along the longitudinal direction (Y direction) of the pixel 26R for each pixel 26R. In the case where the pixel 26R (pixel electrode 53) has a rectangular shape having a length in the Y direction, two protrusions 52 having a square bottom surface are arranged in the Y direction, so that two pixels 26R are provided on the pixel electrode 53 for each pixel 26R. With the protrusions 52 aligned, the amount of light transmitted through the pixels 26R, 26G, and 26B can be made the same for each of the pixels 26R, 26G, and 26B, and the occurrence of moire can be prevented more reliably. it can.

  Further, for example, as in the first embodiment, a plurality of quadrangular pyramidal protrusions are provided for each pixel 26R, compared to a case where one quadrangular pyramidal protrusion 36 is provided for each pixel 26R. When the portions 52 are provided correspondingly, the inclination of the slope of the protrusion 52 in one pixel 26R can be suppressed, and the light unevenness in one pixel 26R can be suppressed, so that the display quality can be improved. An excellent liquid crystal device can be obtained.

  Note that, for example, a transflective liquid crystal panel including a light transmission region R1 corresponding to the protrusion 52A and a light reflection region R2 corresponding to the protrusion 52B illustrated in FIG. You may make it provide the condensing sheet | seat 51 provided with the protrusion 52A of the width | variety p of the X direction and Y direction which match | combined the width | variety q of the X direction of the area | region R1, and the Y direction. Thereby, for example, the surface area of the protrusion 52A can be made the same for each of the pixels 26R, 26G, and 26B, and the amount of light transmitted through the light transmission region R1 of the pixels 26R, 26G, and 26B can be changed for each of the pixels 26R, 26G, and 26B. Compared with the case where the amount of light transmitted through the light transmission region R1 of the pixels 26R, 26G, and 26B is different for each pixel, for example, the moire depending on the light collecting sheet 51 is prevented. Etc. can be prevented and display quality can be improved.

  (Second modification)

  Next, a liquid crystal device according to a second modification of the present invention will be described with reference to the drawings.

  FIG. 12 is a plan view of a liquid crystal panel of a liquid crystal device of a second modification, and FIG. 13 is a cross-sectional view of a light collecting sheet used for the liquid crystal panel of the second modification.

  In the above embodiment and the modification, for example, as illustrated in FIG. 3, the example in which the vertex O of the protrusion 36 of the light collecting sheet 31 is provided at the substantially center of the bottom surface of the protrusion 36 is illustrated. In the liquid crystal device 60, as shown in FIG. 12, the apex P of the projection 62 of the condensing sheet 61 described later is, for example, the apex O of the projection 36 of the condensing sheet 31 of the first embodiment (the center of the light transmission region). Compared with O), it is shifted in the X direction approaching the light source 34.

  The light collecting sheet 61 includes a plurality of quadrangular pyramidal protrusions 62 arranged adjacent to each other in the X direction and the Y direction in FIG. 13. The shape of the bottom surface of the protrusion 62 is, for example, a square, and the apex P of the protrusion 62 is shifted from the approximate center of the bottom surface of the protrusion 62, for example, in the X direction of the light source 34 as shown in FIGS. Is provided. The protrusion 62 includes four inclined surfaces 62a, 62b, 62c and 62d which are inclined on the bottom surface of the protrusion 62 as shown in FIGS. The area of the slope 62b is larger than the area of the slope 62a, and the areas of the slope 62c and the slope 62d are substantially the same.

  The widths p of the protrusions 62 in the X and Y directions are set so as to match the widths q in the X and Y directions between the light shielding layers 22 as shown in FIGS. As shown in FIG. 12, the apex P of the protrusion 62 of the light collecting sheet 61 is provided so as to be shifted from the approximate center O of the pixel electrode 10 in the X direction approaching the light source 34. Similarly, the apexes P of the other protrusions 62 are also provided so as to be shifted from the approximate center O of the corresponding pixel electrode 10 in the X direction approaching the light source 34, for example.

  When the light emitted from the light source 34 enters the light collecting sheet 61 via the light guide plate 33 or the like, the amount of light transmitted in the direction away from the light source 34 is larger than the amount of light transmitted in the direction approaching the light source 34. Easy to be.

  Thus, in this modification, the apex P of the protrusion 62 of the light collecting sheet 61 is, for example, compared with the apex O (the center O of the light transmission region) of the protrusion 36 of the light collecting sheet 31 of the first embodiment. , The area of the slope 62b is larger than the slope 62a of the protrusion 62 as shown in FIG. 13, compared to the case where the areas of the four slopes of the protrusion are the same. Largely, the light can be more deflected in the Z direction by the inclined surface 62b, and the luminance can be improved and the display quality can be improved.

  In the embodiment and the modification, for example, the condensing sheet 31 including the quadrangular pyramid-shaped protrusion 36 and the condensing sheet 42 including the protrusion 43 are illustrated, but the shape of the protrusion is limited to these. For example, the shape of the protrusion may be a bowl shape, a circular planar shape, or a trapezoidal cross section. Thereby, for example, as shown in FIG. 14, when the protrusion 72 of the light collecting sheet 71 has a bowl-shaped shape with a width p, for example, more light is biased in the Z direction orthogonal to the bottom surface of the protrusion 72. The amount of light transmitted through the light transmission regions of the pixels 26R, 26G, and 26B can be made the same for each of the pixels 26R, 26G, and 26B. For example, the generation of moire or the like depending on the light collecting sheet can be prevented and the display quality can be improved. In addition, the liquid crystal device with a wide viewing angle can be obtained.

  Moreover, in the said embodiment and the modification, although the example which provides the diffusion sheet 32 between the condensing sheet 31 and the light-guide plate 33 was shown, for example, as shown in FIG. You may make it the sheet | seat 31 equip the surface facing the light-guide plate 33 with the protrusion part which abbreviate | omitted illustration. What is necessary is just to form this protrusion part by embossing, bead coating, etc., for example. Thereby, since the condensing sheet 31 is provided with a protruding portion (not shown) on the surface facing the light guide plate 33, for example, the light guide plate 33 and the light condensing sheet 31 can be prevented from coming into close contact with each other. It is possible to prevent the light sheet 31 from being bent and to prevent Newton rings from being generated due to light interference. Further, since the light can be diffused by the protruding portion of the light collecting sheet 31, the display quality can be further improved.

  (Third Embodiment / Electronic Device)

  Next, an electronic apparatus according to the third embodiment of the present invention including the above-described liquid crystal device 1 will be described.

  FIG. 15: is a schematic block diagram of the whole structure of the display control system of the electronic device concerning the 3rd Embodiment of this invention.

  The electronic device 300 includes, for example, a liquid crystal panel 2 and a display control circuit 390 as shown in FIG. 15 as a display control system. The display control circuit 390 includes a display information output source 391, a display information processing circuit 392, a power supply circuit 393, and the like. A timing generator 394 and the like are included.

  The liquid crystal panel 2 has a drive circuit 361 including a driver IC 12 that drives the display area I.

  The display information output source 391 includes a memory such as a ROM (Read Only Memory) or a RAM (Random Access Memory), a storage unit such as a magnetic recording disk or an optical recording disk, and a tuning circuit that tunes and outputs a digital image signal. It has. Further, the display information output source 391 is configured to supply display information to the display information processing circuit 392 in the form of a predetermined format image signal or the like based on various clock signals generated by the timing generator 394.

  The display information processing circuit 392 includes various well-known circuits such as a serial-parallel conversion circuit, an amplification / inversion circuit, a rotation circuit, a gamma correction circuit, and a clamp circuit, and executes processing of input display information to display the image. Information is supplied to the drive circuit 361 together with the clock signal CLK. The power supply circuit 393 supplies a predetermined voltage to each component described above.

  Thus, according to this embodiment, since the liquid crystal device 1 capable of preventing the occurrence of moire or the like is provided, an electronic apparatus having excellent display performance can be obtained.

  Specific electronic devices include touch panels equipped with liquid crystal devices in addition to mobile phones and personal computers, projectors, liquid crystal televisions and viewfinder types, video tape recorders with direct view of monitors, car navigation systems, pagers, electronic notebooks, A calculator, a word processor, a workstation, a video phone, a POS terminal, etc. are mentioned. Needless to say, for example, the above-described liquid crystal device 1 or the like is applicable as a display unit of these various electronic devices.

  Note that the electronic apparatus of the present invention is not limited to the above-described example, and it is needless to say that various modifications can be made without departing from the gist of the present invention. Moreover, you may combine said each embodiment in the range which does not change the summary of this invention.

  For example, in the above-described embodiment, the TFT type liquid crystal device 1 and the like have been described. However, the present invention is not limited to this. In addition, the present invention may be applied to various liquid crystal devices such as a plasma display device, an electrophoretic display device, and a device using an electron-emitting device (such as a field emission display and a surface-conduction electron-emitter display).

1 is a schematic perspective view of a liquid crystal device according to a first embodiment of the present invention. It is AA sectional drawing of the liquid crystal panel of FIG. It is a top view of the condensing sheet used for the liquid crystal panel of FIG. It is a top view of the liquid crystal panel of FIG. 4 is a flowchart illustrating a manufacturing process of the liquid crystal device according to the first embodiment. It is sectional drawing of the liquid crystal panel of the liquid crystal device of 2nd Embodiment. It is a top view of the condensing sheet used for the liquid crystal panel of 2nd Embodiment. It is a top view of the liquid crystal panel of FIG. It is a top view of the liquid crystal panel of the liquid crystal device of the 1st modification. FIG. 10 is a plan view of a light collecting sheet used in the liquid crystal device of FIG. 9. It is a top view of the liquid crystal panel of a transflective liquid crystal device. It is a top view of the liquid crystal panel of the liquid crystal device of the 2nd modification. It is sectional drawing of the condensing sheet used for the liquid crystal panel of a 2nd modification. It is sectional drawing of the condensing sheet used for a liquid crystal panel. It is a schematic block diagram of the display control system of the electronic device of 3rd Embodiment which concerns on this invention.

Explanation of symbols

  T: Thin film transistor element, q: Width, p: Width, O ... Vertex, center, O1, O2, O3, O4, O5, O6, O7, P ... Vertex, s ... Width, I ... Display area, 1 ... Liquid crystal device 2 ... Liquid crystal panel 3 ... Circuit board 4 ... Illumination device 5, 6 ... Substrate 5a ... Area 7 ... Sealing material 8 ... Gate electrode 9 ... Source electrode 10 ... Pixel electrode 11 ... Alignment film 12, 13 ... Driver IC, 15, 16, 16, 17, 18, 19 ... Wiring, 21R, 21G, 21B ... Colored layer, 22 ... Light-shielding layer, 23 ... Flattening layer, 24 ... Common electrode, 25 ... Orientation Membrane, 26R, 26G, 26B ... pixel, 26R2 ... pixel, 27 ... flexible substrate, 28 ... output wiring, 29 ... input wiring, 30 ... semiconductor element, 31 ... condensing sheet, 32 ... diffusion sheet, 33 ... Light guide plate 34 Light source 35 ... Reflective sheet 36 ... Projection, 36a, 36b, 36c, 36d ... Slope, 36A, 36B, 36C ... Projection, 37a, 37b, 37c, 37d ... Slope, 40 ... Liquid crystal device, 41 ... Illumination device 42 ... Condensation sheet, 43 ... Projection, 43a, 43b, 43c, 43d ... Slope, 43A, 43B ... Projection, 43a ... Slope, 45 ... Flat part, 50 ... Liquid crystal device, 51 ... Condensation sheet, 52 ... Projection, 52a, 52b ... Slope, 52A, 52B ... Protrusion, 53 ... Pixel electrode, 54 ... Flat part, 60 ... Liquid crystal device, 61 ... Condensing sheet, 62 ... Protrusion, 62a, 62b, 62c, 62d ... Slope, 71 ... Condenser sheet, 72 ... Projection, 300 ... Electronic equipment, 361 ... Drive circuit, 390 ... Display control circuit, 391 ... Display information output source, 392 ... Display information Physical circuit, 393 ... power supply circuit, 394 ... timing generator

Claims (12)

An electro-optical panel in which a plurality of pixels having at least a light transmission region are arranged;
A condensing sheet that is provided on the side opposite to the viewing side of the electro-optical panel and has a plurality of protrusions formed by combining the width and width of the light transmission region of the pixel;
A light guide plate for emitting light to the light collecting sheet;
An electro-optical device comprising: a light source that emits light to the light guide plate.   The electro-optical device according to claim 1, wherein the protrusions are provided with adjacent protrusions continuously.   The electro-optical device according to claim 1, wherein each of the plurality of protrusions is provided corresponding to each of the plurality of pixels.   The apex of the protrusion is provided so as to be shifted from the center of the light transmission region of the pixel corresponding to the apex to the side closer to the light source. The electro-optical device according to claim 1.   The electro-optical device according to claim 3, wherein an apex of the protrusion is provided in correspondence with a center of the light transmission region of the pixel.   The electro-optical device according to claim 1, wherein the protrusion has a quadrangular pyramid shape.   6. The electro-optical device according to claim 1, wherein the protrusion has a bowl shape, a planar shape is a circular shape, or a cross-section is a trapezoidal shape.   The electro-optical device according to claim 1, wherein the condensing sheet has a protrusion on a surface facing the light guide plate.   The electro-optical device according to claim 1, wherein a plurality of the protrusions are provided for each pixel along a longitudinal direction of the pixel. The electro-optical panel includes a pixel electrode provided corresponding to the pixel, and a light-shielding layer overlapping a part of the pixel electrode,
The electro-optical device according to claim 1, wherein the pixel is formed by a region of the pixel electrode where the light shielding layer does not overlap. A condensing sheet provided on the side opposite to the viewing side of the electro-optic panel in which a plurality of pixels having at least a light transmission region are arranged, and having a plurality of protrusions formed by matching the width and width of the light transmission region of the pixels; ,
A light guide plate for emitting light to the light collecting sheet;
A lighting device comprising: a light source that emits light to the light guide plate.   An electronic apparatus comprising the electro-optical device according to any one of claims 1 to 10.

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