JP2006267543A - Lighting device, electrooptical device and its manufacturing method, and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thin type lighting device that converges light incident from all directions on a liquid crystal display panel and eliminate moire, and also to provide an electrooptical device using the same. <P>SOLUTION: The electrooptical device is, for example, a liquid crystal display device and equipped with: a light source; a light guide plate on which the light from the light source is made incident; a microlens sheet which is provided on a light projection surface side of the light guide plate and has a plurality of microlenses on the light projection surface; and a display panel provided on a light projection surface side of the microlens sheet. Here, the light source is, for example, an LED or a cold-cathode tube, and the display panel is, for example, a liquid crystal display panel. The microlens sheet converges the light incident from all directions on the display panel. Consequently, view angle dependency of luminance that a double-stacked prism sheet has, is eliminated by installing the microlens sheet between the light guide plate and display panel. Further, sheets are decreased by one, so the device is more thinned. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to an illumination device such as a backlight unit used for a liquid crystal display of a mobile phone.

In the liquid crystal display device, a backlight unit is provided on the back side of the liquid crystal display panel in order to perform transmissive display. In general, a backlight unit includes a light source, a light guide plate that irradiates the back surface of the liquid crystal display panel with light from the light source as planar light, a sheet that diffuses light emitted from the light guide plate, and a light collector. It is configured as an illumination device including a prism sheet that emits light.
The light incident on the light guide plate from the light source is repeatedly reflected between the light exit surface and the reflection surface of the light guide plate, and then exits from the light exit surface to the outside.

  Light emitted from the light guide plate enters the prism sheet. In the prism sheet, incident light can be refracted and emitted toward the liquid crystal display panel. Therefore, the prism sheet has a role of increasing the luminance of the lighting device. In a general lighting device, two prism sheets having different prism ridge directions are used in an overlapping manner. Thereby, light incident in a direction perpendicular to the direction of the ridge line of each prism can be emitted toward the liquid crystal display panel, and the luminance of the illumination device can be increased. Further, in Patent Document 1, the direction of the ridge line of one prism is inclined with respect to the direction of the ridge line of the other prism, thereby eliminating interference (moire) with the linear elements of the liquid crystal display panel. .

  However, in the above example, only the light of the component perpendicular to the ridge line of each prism among the light incident on the prism sheet can be condensed toward the liquid crystal display panel. Further, since it is necessary to use two prism sheets, there is a problem from the viewpoint of thinning the lighting device.

JP-A-8-68997

  The present invention has been made in view of the above points, and is a thin illumination that can collect light incident from all directions toward a liquid crystal display panel and can also eliminate moiré. It is an object to provide a device and an electro-optical device using the device.

  In one aspect of the present invention, an electro-optical device includes a light source, a light guide plate that receives light from the light source, and a light emitting surface side of the light guide plate. The micro lens includes a plurality of micro lenses on the light output surface. A sheet and a display panel provided on the light exit surface side of the microlens sheet.

  The above electro-optical device is, for example, a liquid crystal display device, and is provided with a light source, a light guide plate that receives light from the light source, a light output surface side of the light guide plate, and a plurality of micro lenses on the light output surface. A lens sheet, and a display panel provided on the light exit surface side of the microlens sheet. Here, the light source is, for example, an LED or a cold cathode tube, and the display panel is, for example, a liquid crystal display panel. The microlens sheet can collect light incident from all directions onto the display panel. Therefore, by installing the microlens sheet between the light guide plate and the display panel, it is possible to eliminate the viewing angle dependency of the luminance generated in the two-layered prism sheet. Further, since the number of sheets can be reduced, the apparatus can be thinned.

  In one aspect of the electro-optical device, the microlens sheets are irregularly arranged in the microlens sheet. Thereby, the moire generated between the linear elements of the display panel can be suppressed.

  In another aspect of the electro-optical device, the microlens sheet has a diameter of the microlens that is smaller than a short side of a light transmission portion of a pixel of the display panel. Thereby, the light emitted from one microlens can be condensed in the light transmission portion of one pixel, and the light distribution characteristics in the entire display panel can be kept constant.

  In another aspect of the electro-optical device, the microlens sheet is densely arranged in the microlens sheet. Thereby, since many microlenses can be arrange | positioned to a microlens sheet | seat, the light quantity of the light radiate | emitted from the whole microlens sheet | seat can be increased.

  In another aspect of the electro-optical device, the electro-optical device further includes a spacer that bonds the microlens sheet and the display panel, and the spacer has a constant width between the microlens sheet and the display panel. Is provided. By providing a certain width, it is possible to prevent contact between the microlens sheet and the display panel, and it is possible to improve the light condensing property due to the lens effect of the microlens on the liquid crystal display panel.

  In another aspect of the electro-optical device, the microlens is formed by fixing a spherical translucent ball with a binder. Here, as a material of the translucent ball, for example, a transparent resin ball can be used, and as the binder, for example, a transparent adhesive material made of a photosensitive resin can be used. Thus, as a material for the microlens, a translucent ball such as a resin ball can be used.

  In another aspect of the electro-optical device, the binder has the same light refractive index as that of the light-transmitting ball. Thereby, the light emitted from the binder can also be directed in the direction of condensing on the display panel.

  In another aspect of the electro-optical device, half of the spherical surface of the translucent ball is projected onto the light exit surface when the binder is cured. Thereby, half of the spherical surface projected on the light exit surface of the translucent ball can be used as the convex lens of the microlens.

  In another aspect of the present invention, an electronic apparatus including the electro-optical device as a display unit can be configured.

  In another aspect of the present invention, a lighting device includes a light source, a light guide plate that receives light from the light source, a microlens sheet that is provided on a light output surface side of the light guide plate and has a plurality of microlenses on the light output surface. And comprising. Thereby, the viewing angle dependency of luminance can be eliminated, and a thin device can be achieved.

  In another aspect of the present invention, a method of manufacturing an electro-optical device includes a light source, a light guide plate that receives light from the light source, a light output surface side of the light guide plate, and a plurality of microlenses on the light output surface. An electro-optical device manufacturing method comprising: a microlens sheet having a display panel provided on a light exit surface side of the microlens sheet, wherein a translucent ball and a binder are applied to a substrate; A step of forming the microlens sheet by curing.

  In the above electro-optical device manufacturing method, a light source, a light guide plate that receives light from the light source, a microlens sheet that is provided on the light output surface side of the light guide plate and has a plurality of microlenses on the light output surface, And a display panel provided on a light exit surface side of the microlens sheet, the electro-optical device comprising: a light-transmitting ball and a binder applied to a base material; Forming a lens sheet. In the microlens sheet forming process for forming the microlens sheet, complicated processing such as prism cutting in the formation of the prism sheet is not required, and therefore the microlens sheet can be manufactured at low cost.

  In a preferred embodiment, a light source, a light guide plate that receives light from the light source, a micro lens sheet that is provided on the light output surface side of the light guide plate and has a plurality of micro lenses on the light output surface, and the micro lens sheet A display panel provided on the light-emitting surface side of the electro-optical device, wherein the micro lens sheet is injected and cured by injecting a resin into a mold engraved with the shape of the micro lens sheet. Forming a lens sheet.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[Configuration of liquid crystal display device]
FIG. 1 shows a schematic configuration of a liquid crystal display device 100 to which the illumination device of the present invention is applied. In FIG. 1, a lighting device 50 according to the present invention is a surface-emitting type lighting device used as a backlight unit such as a liquid crystal display device 100. The illumination device 50 includes the light guide plate 10 having the light source 11 on the end surface, and includes the reflection sheet 14 below the light guide plate 10. The lighting device 50 includes a diffusion sheet 13 and a microlens sheet 15 on the upper side of the light guide plate 10. The illumination device 50 is bonded to the liquid crystal display panel 16 by the spacer 17. The light L emitted from the light guide plate 10 passes through the diffusion sheet 13 and the microlens sheet 15 as shown in the figure, and illuminates the liquid crystal display panel 16 from the back side. Thereby, the transmissive display of the liquid crystal display device 100 becomes possible.

  In the illumination device 50 of the present invention, the light source 11 includes a plurality of LEDs 12 as point light sources, for example, and emits light to an end surface (hereinafter referred to as “light incident end surface”) 10 c of the light guide plate 10 facing the light source. The light guide plate 10 has a rectangular planar shape and is made of a transparent resin such as an acrylic resin. The upper surface 10a of the light guide plate 10 is a surface that emits light (hereinafter referred to as “light-emitting surface”), and the lower surface 10b is a surface that reflects light (hereinafter referred to as “reflecting surface”). .

  The light L emitted from the light source 11 enters the light guide plate 10 from the light incident end surface 10c, and is repeatedly reflected between the reflection surface 10b and the light emission surface 10a. When the angle between the light exit surface 10a and the light exceeds the critical angle, the light exits the light exit surface 10a and exits to the outside. At this time, the reflection sheet 14 has a role of totally reflecting the light emitted from the reflection surface 10 b of the light guide plate 10 and returning it to the inside of the light guide plate 10. The diffusion sheet 13 has a role of diffusing the light L emitted from the light guide plate 10 to make the brightness in the light emitting surface of the lighting device 50 uniform.

  In the illumination device 50 of the present invention, the light L is directed to the liquid crystal display panel 16 by using a microlens sheet instead of the commonly used prism sheet. The microlens sheet 15 is a sheet in which a number of convex microlenses 21 are arranged on the surface on the liquid crystal display panel 16 side, that is, the light exit surface. The microlens sheet 15 has a role of refracting the light L emitted from the light guide plate 10 and transmitted through the diffusion sheet 13 by the lens effect of the microlens 21 and condensing it on the liquid crystal display panel 16. The microlens sheet 15 is bonded to the liquid crystal display panel 16 by a spacer 17. At this time, an air layer 20 having a certain width is provided between the microlens 21 and the liquid crystal display panel 16 depending on the thickness of the spacer 17. By providing the air layer 20, the contact between the microlens sheet 15 and the liquid crystal display panel 16 can be prevented, and the microlens 21 can be prevented from being scratched by the contact with the liquid crystal panel 16. Moreover, by providing the air layer 20, the light emitted from the microlens 21 can be condensed on the liquid crystal panel 16 by the lens effect.

[Light collection on prism sheet]
First, for comparison, light collection in a general illumination device using a prism sheet will be described.

  In a general lighting device, a two-layered prism sheet is used to collect light on a liquid crystal display panel. FIG. 2 is an enlarged view of a prism sheet used in a general lighting device. FIG. 2A is an enlarged cross-sectional view of a two-layered prism sheet, and FIG. 2B is an enlarged plan view of a two-layered prism sheet. In the prism sheet 22a, convex triangular prisms are formed in stripes on the liquid crystal display panel side. In FIGS. 2A and 2B, light before being refracted by the prism sheet 22a is indicated as light La_in by a broken line arrow, and light after being refracted by the prism sheet 22a is indicated as light La_out by a solid line arrow. ing.

  As shown in FIG. 2A, the prism sheet 22a can condense incident light La_in as light La_out along the direction of the prism ridge line 22ap toward the liquid crystal display panel. In a general lighting device, a prism sheet 22b having a prism ridge line 22bp in a direction different from the direction of the prism ridge line 22ap is arranged so as to overlap the prism sheet 22a. Thereby, not only the light along the direction of the prism ridge line 22ap but also the light along the prism ridge line 22bp can be collected, so that the light use efficiency can be improved and the luminance can be increased. .

  As shown in FIG. 2B, in a general lighting device, when the prism sheet 22b is superimposed on the prism sheet 22a, the direction of the prism ridge line 22bp is perpendicular to the direction of the prism ridge line 22ap. Superimposed. In the liquid crystal display panel, linear elements having a matrix shape or a stripe shape are formed. For this reason, when the prism ridge line and some linear elements of the liquid crystal display panel are parallel, interference (moire) may occur between them. Therefore, in a general lighting device, the prism ridgelines 22ap and 22bp overlapped with each other in a direction orthogonal to each other are arranged at a certain angle with respect to the outer side of the liquid crystal display panel. This prevents the directions of the prism ridge lines 22ap and 22bp from being parallel to the linear elements of the liquid crystal display panel, thereby suppressing the occurrence of moire.

  However, as shown in FIG. 2 (b), only the portions 22app and 22bpp along the respective prism ridgelines 22ap and 22bp become brighter in the two-layered prism sheets 22a and 22b, so the directions along the prism ridgelines 22ap and 22bp For example, when viewed from the direction e1, it is brightly illuminated, but when viewed from the other direction, for example, the direction e2, a phenomenon of darkening occurs. That is, in a general lighting device using two stacked prism sheets 22a and 22b, a viewing angle dependency in which the luminance changes depending on the viewing direction angle occurs.

[Condensation of light by microlens sheet]
Next, light collection by the microlens sheet will be described. As described above, the microlens sheet 15 has a large number of microlenses 21 arranged on its light exit surface.

FIG. 3 is an enlarged view of the microlens 21. FIG. 3A is an enlarged cross-sectional view of the microlens 21, and FIG. 3B is an enlarged plan view of the microlens 21. 3A and 3B, the light L before being refracted by the microlens 21 is indicated as light L_in by a broken line arrow, and the light L after being refracted by the lens 21 is indicated as light L_out by a solid line arrow. Show.
In the enlarged plan view of the microlens 21 in FIG. 3B, the incident direction of the light L_in that can be directed to the liquid crystal display panel 16 by refraction is shown. The microlens 21 has a hemispherical shape. As shown in FIG. 3A, the light L_in incident from all directions of the microlens 21 is refracted equally toward the liquid crystal panel 16 and collected as light L_out. Can be lighted. In other words, the microlens 21 can refract light of components in all directions of light incident on the microlens 21 equally to the liquid crystal panel 16 and collect it as light L_out. In this way, in the illumination device 50 using the microlens sheet 15, the light incident from the microlens 21 from all directions can be refracted and collected. Therefore, compared with the two-layered prism sheet, Utilization efficiency can be maximized and brightness can be increased.

  Moreover, since the microlens 21 can refract and collect the light incident from all directions toward the liquid crystal panel 16 equally, the peripheral portion 21pp of the microlens 21 can be illuminated equally brightly. . Therefore, in the illumination device 50 using the microlens sheet 15, the luminance does not change depending on the viewing direction. For this reason, unlike a general illumination device using a two-layered prism sheet, the illumination device 50 of the present invention does not have luminance viewing angle dependency. Therefore, by using the microlens sheet 15 for the lighting device, it is possible to eliminate the viewing angle dependency of the luminance generated in the lighting device using the two-layered prism sheet, and to realize a lighting device having a luminance with a wide viewing angle. Further, in the lighting device 50 of the present invention, by using one microlens sheet 15, it can be reduced by one sheet as compared with a general lighting device using a two-layer prism sheet. Thinning can be achieved.

[Size and arrangement of microlenses]
Next, the size and arrangement of the microlenses 21 in the microlens sheet 15 will be described. FIG. 4 is an enlarged plan view of the microlens sheet 15. As shown in FIG. 4, microlenses 21 of various sizes are densely arranged on the microlens sheet 15.

  The diameter R of the micro lens 21 is made smaller than the short side SL of the light transmission part of the liquid crystal display panel. Here, an example of the light transmission part of the liquid crystal display panel is shown in FIGS. As shown in FIGS. 5A and 5B, the light transmission part of the liquid crystal display panel refers to a range of the pixel electrode 31 in one pixel, that is, a sub-pixel displaying one color. When the area of the electrode 31 is shielded from light by the black matrix BM, the portion where the black matrix BM is removed, that is, the opening 32 is indicated. Accordingly, the size R of the microlens 21 is 50 μm or less. In this way, by making the size of the microlens 21 smaller than that of the light transmission part, the light emitted from one microlens 21 is collected in one light transmission part. Thereby, it is possible to suppress the occurrence of light brightness and darkness for each pixel (sub-pixel), and the light distribution characteristics of the entire liquid crystal display panel can be kept constant.

  Further, by arranging the microlenses 21 densely, more microlenses 21 can be arranged on the microlens sheet 15. Accordingly, the amount of light emitted from the entire microlens sheet 15 can be increased, and the luminance of the entire liquid crystal display panel can be increased.

  Furthermore, as shown in FIG. 4, the microlenses 21 do not have regularity on the microlens sheet 15 and are irregularly (randomly) arranged. If the microlenses 21 are arranged in a specific direction with a certain regularity, moire occurs between the specific direction and the linear elements of the liquid crystal display panel. There is a possibility that. Therefore, as shown in FIG. 4, in the illumination device 50 of the present invention, the microlens 21 is irregularly arranged on the microlens sheet 15, so that the microlens parallel to the linear elements of the liquid crystal display panel 16 is arranged. It is not necessary to generate a specific arrangement direction, and generation of moire can be suppressed. Note that the microlens 21 only needs to be irregularly arranged on the microlens sheet 15, and therefore the size of the microlens 21 is not limited to a constant size. As shown in FIG. 4, microlenses having various sizes can be used as the microlens 21. Thereby, in a general lighting device, the generation of moire is suppressed by using a double-layered prism sheet, whereas in the lighting device 50 of the present invention, the generation of moire is suppressed by a single microlens sheet 15. Can do.

[Production method of micro lens sheet]
Next, a method for manufacturing a microlens sheet will be described. FIG. 6 is a schematic diagram showing a method for manufacturing a microlens sheet.

  As shown in FIG. 6A, first, a spherical transparent resin ball 43 is mixed in a transparent adhesive material 42 made of a photosensitive resin. Next, the adhesive material 42 mixed with the resin balls 43 is applied onto the transparent PET base material 41 made of polyethylene terephthalate (PET) by spraying from the nozzle 44. This resin ball becomes the material of the convex lens portion of the microlens 21.

  As shown in FIG. 6B, the adhesive material 42 is applied to a thickness that allows the resin balls 43 to be buried about half. FIG. 7 is an enlarged view of one resin ball 43 in FIG. By doing so, the portion 45 of the resin ball 43 that is not filled with the adhesive material 42 functions as a convex lens portion of the microlens 21.

  Both the adhesive material 42 and the resin ball 43 are made of materials having the same refractive index. This is because, as shown in FIG. 7A, the portion 46 of the adhesive material 42 attached to the resin ball 43 is also a portion that functions as a part of the microlens 21. If the adhesive material 42 and the resin ball If the refractive index of 43 is different, the light Lu emitted from the resin ball 43 and the light Lv emitted from the portion 43 attached to the resin ball 43 of the adhesive material 42 will be different from each other. . That is, if the refractive index of the adhesive material 42 and the resin ball 43 are different, the resin ball of the adhesive material 42 can be obtained even if the direction Lu of the light emitted from the resin ball 43 is directed to the direction of condensing light on the liquid crystal display panel 16. The direction Lv of light emitted from the portion 46 adhering to 43 may not be directed to the direction of condensing on the liquid crystal display panel 16, making it difficult to control the light emission direction. Therefore, by using a material having the same refractive index of light as the material of the adhesive material 42 and the resin ball 43, the direction of the light emitted from the resin ball 43 is directed to the liquid crystal display panel 16 and at the same time from the adhesive material 42. The direction of the emitted light can also be directed to the display panel.

  The thickness of the adhesive material 42 can be asymmetric with respect to the resin ball 43. In the example shown in FIG. 7B, the adhesive material 42 fills the resin balls 43 with different thicknesses in the area Area1 and the area Area2. That is, the adhesive material 42 is more thickly applied on the PET base material 41 in the area Area2 than in the area Area1. Therefore, the area of the spherical surface of the resin ball 43 protruding from the surface of the adhesive material 42 is larger in the area Area1 than in the area Area2. From this, the light condensing property in the area Area1 is larger than the light condensing property in the area Area2, so that such a microlens 21 has a specific direction, as shown in FIG. Directivity of light condensed in the direction of Lw. Thus, by making the thickness of the adhesive material 42 asymmetric with respect to the resin ball 43, the microlens sheet 15 having light directivity in a specific direction can be manufactured.

  Thus, after the adhesive material 42 mixed with the resin balls 43 is applied on the PET base material 41, the adhesive material 42 is cured by irradiating the adhesive material 42 with ultraviolet rays or the like and drying it. In this way, as shown in FIG. 6C, a microlens sheet 15 having microlenses 21 can be produced. When producing a double-layered prism sheet, it is necessary to perform a complicated cutting process of obliquely cutting out the prism ridge line for one of the prism sheets. In the case of producing a microlens sheet, such processing is not required, so that the cost can be reduced.

  In addition, as a manufacturing method of a micro lens sheet, it is not restricted to what was mentioned above. As another example of the method for manufacturing the microlens sheet, FIG. 8 shows a method for manufacturing the microlens sheet 15 using a mold. As shown in FIG. 8A, a resin is sealed between a mold 48 engraved with a microlens sheet 15 shape by cutting or the like and a counterpart mold 49 by injection or the like. To do. Then, as shown in FIG. 8B, after the resin is cured, the mold 48 and the mold 49 are separated, and the microlens sheet 15 formed of the internal resin is taken out. In this way, the microlens sheet 15 in which the microlenses 21 are integrally molded can be obtained.

[Electronics]
Next, specific examples of electronic devices to which the liquid crystal display device 100 according to the present invention can be applied will be described with reference to FIG.

  First, an example in which the liquid crystal display device 100 according to the present invention is applied to a display unit of a portable personal computer (so-called notebook personal computer) will be described. FIG. 9A is a perspective view showing the configuration of this personal computer. As shown in the figure, the personal computer 710 includes a main body 712 having a keyboard 711 and a display 713 to which the liquid crystal display panel according to the present invention is applied.

  Next, an example in which the liquid crystal display device 100 according to the present invention is applied to a display unit of a mobile phone will be described. FIG. 9B is a perspective view showing the configuration of this mobile phone. As shown in the figure, the cellular phone 720 includes a plurality of operation buttons 721, a reception port 722, a transmission port 723, and a display unit 724 to which the liquid crystal display device 100 according to the present invention is applied.

  Electronic devices to which the liquid crystal display device 100 according to the present invention can be applied include a liquid crystal television and a viewfinder in addition to the personal computer shown in FIG. 9A and the mobile phone shown in FIG. Type / monitor direct-view type video tape recorder, car navigation device, pager, electronic notebook, calculator, word processor, workstation, videophone, POS terminal, digital still camera, etc.

It is a side view which shows schematic structure of the liquid crystal display device of this invention. It is an enlarged view of the prism sheet used with a general illuminating device. It is an enlarged view of the micro lens in a micro lens sheet. It is an enlarged plan view of a microlens sheet. It is a figure which shows the magnitude | size of a micro lens. It is a figure which shows the manufacturing method of a micro lens sheet. It is a figure which shows the manufacturing method of a micro lens sheet. It is a figure which shows the other manufacturing method of a micro lens sheet. It is the schematic which shows the electronic device to which the illuminating device of this invention is applied.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Light guide plate, 11 Light source, 12 LED, 13 Diffusion sheet, 14 Reflection sheet, 15 Micro lens sheet, 16 Liquid crystal display panel, 17 Spacer, 50 Illumination device, 100 Liquid crystal display device

Claims (12)

A light source;
A light guide plate that receives light from the light source;
A microlens sheet provided on the light output surface side of the light guide plate, and having a plurality of microlenses on the light output surface;
And a display panel provided on the light exit surface side of the microlens sheet.   The electro-optical device according to claim 1, wherein the microlens sheet includes irregularly arranged microlenses.   The electro-optical device according to claim 1, wherein the microlens sheet has a diameter of the microlens that is smaller than a short side of a light transmission portion of a pixel of the display panel.   The electro-optical device according to any one of claims 1 to 3, wherein the microlens sheet includes the microlenses arranged densely. A spacer for bonding the microlens sheet and the display panel;
The electro-optical device according to claim 1, wherein the spacer has a certain width between the microlens sheet and the display panel.   6. The electro-optical device according to claim 1, wherein the microlens includes a spherical translucent ball fixed by a binder.   The electro-optical device according to claim 6, wherein the binder has the same light refractive index as that of the translucent ball.   8. The electro-optical device according to claim 6, wherein a half of a spherical surface of the translucent ball is projected onto a light exit surface when the binder is cured.   An electronic apparatus comprising the electro-optical device according to claim 1 in a display unit. A light source;
A light guide plate that receives light from the light source;
An illumination device comprising: a microlens sheet provided on the light exit surface side of the light guide plate and having a plurality of microlenses on the light exit surface. A light source, a light guide plate that receives light from the light source, a microlens sheet that is provided on the light exit surface side of the light guide plate and has a plurality of microlenses on the light exit surface, and a light exit surface side of the microlens sheet A display panel, and an electro-optical device manufacturing method comprising:
A method for manufacturing an electro-optical device, comprising: forming a microlens sheet by applying a translucent ball and a binder to a base material and curing the binder. A light source, a light guide plate that receives light from the light source, a microlens sheet that is provided on the light exit surface side of the light guide plate and has a plurality of microlenses on the light exit surface, and a light exit surface side of the microlens sheet A display panel, and an electro-optical device manufacturing method comprising:
A method for manufacturing an electro-optical device, comprising: forming a microlens sheet by injecting a resin into a mold in which a mold having a shape of the microlens sheet is carved.

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