JP2009081014A - Illumination device, electro-optical device, and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize a structure of an illumination device capable of reducing the light shielding width on an inclined surface part without generating spots at an edge part of an illumination range. <P>SOLUTION: This illumination device is provided at the end part with a light source 11, and a light incident surface 13a configured into a plate shape and facing a light discharging surface 11a of the light source, and includes a light guide plate 13 provided with a light-emitting part 13b at least at a part of a light-emitting surface side for emitting light which is made incident inside from the light incident surface and propagated. Between the light incident surface and the light-emitting part, the light guide plate includes the incident surface part 13d in which the thickness of the light guide plate is made thick on the side of the light source and made thin on the side of the light-emitting part. An inclined angle θ formed by the surface of the light-emitting part and the inclined surface part on the light guide plate is large on the side of the light incident surface and small on the side of the light-emitting part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a lighting device, an electro-optical device, and an electronic apparatus, and more particularly to a structure of a lighting device including a light source and a light guide plate that propagates and emits light from the light source.

  Generally, as an illuminating device used as a backlight of a liquid crystal display or the like, a sidelight type (edge light type) having a light source such as an LED and a light guide plate provided with a light incident surface arranged to face the light source. A lighting device is used. Such an illuminating device is excellent in that the thickness of the backlight can be reduced, and thus is often used particularly when a liquid crystal display is mounted on a portable electronic device such as a cellular phone.

  In recent years, in the lighting device as described above, since electronic devices have been further reduced in thickness and demand for reduction in thickness has increased, attempts have been made to reduce the thickness of the light guide plate and reduce the thickness of the backlight. . However, if the light guide plate is made thinner, the thickness of the light incident surface becomes smaller with respect to light sources such as LEDs that have not made much progress in miniaturization. There is a problem that a decrease in luminance is inevitable.

  Therefore, conventionally, a light guide plate having an inclined surface portion between the light incident surface and the light emitting portion and having a light guide plate thicker at the light source side and thinner at the light emitting portion has been used (for example, , See Patent Document 1 below). For example, as shown in FIG. 5, a light source 1 such as an LED, a light source substrate 2 on which the light source 1 is mounted, a polarizing plate 3 having a light incident surface 3a, a light emitting portion 3b, a back surface 3c, and an inclined surface portion 3d A lighting device including a reflection sheet 4 disposed on the back surface 3 c of the light guide plate 3, a light diffusion sheet 5 disposed on the light emitting portion 3 b of the light guide plate 3, and light collecting sheets 6 and 7 is used. Moreover, the light shielding sheet 8 provided with the light shielding part on the inclined surface part 3d may be arranged also as a double-sided adhesive tape, for example. An electro-optical device is configured by arranging an electro-optical panel 10 made of a liquid crystal display or the like on these illumination structures.

In such a structure, as shown in FIG. 6, the light emitted from the light emitting surface 1a of the light source 1 enters the light incident surface 3a of the light guide plate 3 and propagates in the right direction in the figure. The light is emitted gradually from the light emitting part 3b. Since the light guide plate 3 is formed thick on the light source 1 side by the inclined surface portion 3d, even the light source 1 having the thick light emission surface 1a efficiently captures more light into the light guide plate 3. Therefore, it is possible to achieve both a thin backlight and brightness. In this case, since the light shielding sheet 8 shields light leaking from the inclined surface portion 3d on the light source 1 side by the light shielding portion 8a, the light shielding sheet 8 has a relatively uniform luminance within the illumination range A as shown in FIG. It becomes.
JP-A-2005-108817

  By the way, the recent thinning and miniaturization of electronic devices have come to require further changes in the configuration of the lighting device as described above. That is, in the above apparatus, since the light shielding width 8x by the light shielding portion 8a of the light shielding sheet 8 is large, the width of the frame region disposed outside the illumination range A is increased, which is against the downsizing of the electronic device. It is required to reduce the light shielding width 8x.

  Therefore, as shown in FIG. 8, it is conceivable that the light emitting portion 3b 'is extended to a position close to the light source 1 by making the inclined surface portion 3d' steeply inclined, thereby reducing the light shielding width 8x '. However, in this case, the portion that has been conventionally shielded from light is exposed as the edge B of the illumination range A, and is reflected by the steeply inclined surface portion 3d ′ of the internal propagation light of the light guide plate 3. Since the light becomes a steeper angle with respect to the illustrated horizontal plane, the amount of light emitted from the region around the edge B on the light source 1 side in the illumination range A increases, as shown in FIG. There arises a problem that a bright spot C is formed in an eyeball shape in the portion where the light source 1 is arranged in the vicinity of the edge B.

  Therefore, the present invention solves the above-mentioned problems, and the problem is to realize a structure of a lighting device that can reduce the light-shielding width on the inclined surface without causing a spot at the edge of the illumination range. There is to do.

  In view of such circumstances, the illumination device of the present invention is configured in a plate shape, and includes a light incident surface facing the light emission surface of the light source at the end, and is incident on the inside from the light incident surface. A light guide plate provided with a light emission part at least at a part of the light emission surface side for emitting the propagating light, the light guide plate comprising the light incident surface and the light emission part on the light incident surface side. Between the surface of the light emitting part and the inclined surface of the light guide plate, wherein the light guide plate has an inclined surface part that is thicker on the light source side and thinner on the light emitting part side. An inclination angle formed with the portion is large on the light incident surface side and small on the light emitting portion side.

  According to the present invention, since the inclination angle of the inclined surface portion is large on the light incident surface side and small on the light emitting portion side, the emitted light with a low emission angle generated by the high inclination angle portion of the inclined surface portion is emitted from the light source. Because the light is concentrated on the side of the illumination area, it becomes difficult for light with a high propagation angle to be emitted at the edge of the illumination area. Since only the light propagates through the light guide plate, it is possible to prevent a spot from being generated due to the concentration of the outgoing light having a low outgoing angle at the edge of the illumination range.

  In this invention, it is preferable that the said inclined surface part is comprised by the concave curved surface from which the said inclination angle falls continuously toward the said light-projection part side from the said light-incidence surface side. According to this, since the inclined surface portion is formed of a concave curved surface having an inclination angle that continuously decreases, the propagation angle distribution of the internal propagation light generated by the internal reflection at the inclined surface portion is smoothly formed. The luminance distribution of the illumination light emitted from the light emitting part can be prevented from becoming non-uniform.

  In this case, it is desirable that the inclined surface portion and the light emitting portion are configured as a continuous surface. According to this, the inclined surface portion and the light emitting portion are formed as a continuous surface (that is, the inclination angle continuously changes from the light incident surface side to the light emitting portion side in the inclined surface portion ( The uniformity of the luminance distribution can be further improved.

  In the present invention, it is preferable that a light diffusion sheet is disposed on the light emitting portion, and the light diffusion sheet is extended to further cover the inclined surface portion. Since the light diffusion sheet covers the inclined surface portion, the leakage light emitted from the high inclination angle portion of the inclined surface portion is diffused by the light diffusion sheet, so that a part of the leakage light is diffused and returned to the light guide plate. In this case, the efficiency of light utilization can be enhanced by using the internal propagation light with a low propagation angle, and at the same time, the luminance distribution within the illumination range can be prevented from being affected by the partial light.

  In this invention, it is preferable that the light shielding sheet which covers the said inclined surface part is arrange | positioned. According to this, since the light shielding sheet covers the inclined surface portion, it is possible to prevent the influence of the leaked light emitted from the high inclination angle portion of the inclined surface portion.

  Next, the electro-optical device of the present invention is configured to have a light source and a plate-like shape, and has a light incident surface facing the light emission surface of the light source at an end, and is incident and propagated inward from the light incident surface. A light guide plate provided with a light emission part at least at a part on the light emission surface side that emits light, and the light guide plate is disposed between the light incident surface and the light emission part of the light guide plate. An inclined surface portion that is inclined in such a manner that the thickness is increased on the light source side and decreased on the light emitting portion side, and an inclination angle formed between the surface of the light emitting portion and the inclined surface portion in the light guide plate is And an illuminating device which is large on the light incident surface side and small on the light emitting portion side, and an electro-optical panel in which a display region is arranged on the light emitting portion.

  Furthermore, an electronic apparatus according to the present invention includes the electro-optical device. In particular, the electronic device of the present invention is preferably a portable electronic device such as a mobile phone, a portable information terminal, an electronic watch, or the like that is strongly demanded to be reduced in size and thickness.

  Next, embodiments of the illumination device 10 and the electro-optical device 100 according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic exploded perspective view showing the overall configuration of the electro-optical device 100 of the present embodiment, and FIG. 2 is an enlarged partial cross-sectional view showing the vicinity of the end of the illumination device 10 on the light source 11 side.

  As shown in FIG. 1, the present embodiment includes an illumination device 10 and an electro-optical panel 20. The illumination device 10 includes a light source 11 made of an LED or the like, a light source substrate 12 on which the light source 11 is mounted, a plate shape, and a light incident surface 13a facing the light emission surface 11a of the light source 11 at the end. The light guide plate 13 provided on the light exit surface, which is one surface, that emits light that enters from the light incident surface 13a and propagates through the inside, and behind the light guide plate 13 (on the opposite side to the viewing side) The light-shielding sheet that defines the illumination range A (see FIG. 2), the reflection sheet 14 made of white polyethylene or the like, the light diffusion sheet 15 and the light-collecting sheets 16 and 17 that are arranged on the light emitting portion 13b. 18.

  Here, the light incident surface 13a is a surface (vertical surface shown in the drawing) substantially orthogonal to the optical axis 11x of the light source 11, and the light emitting portion 13b is a surface parallel to the optical axis 11x and orthogonal to the light incident surface 13a ( (Horizontal plane in the figure). Further, the other surface (back surface) 13c of the light guide plate 13 is a surface substantially parallel to the light emitting portion 13b. The back surface 13c may be provided with a concavo-convex structure for internally reflecting the internally propagated light toward the light emitting portion 13b, or a light scattering layer may be formed. The light emitted from the back surface 13c is reflected by the reflection sheet 14, returns to the inside of the light guide plate 13 again, and is emitted from the light emitting portion 13b. In any case, the light emitted from the light emitting surface 11a of the light source 1 enters from the light incident surface 13a, becomes the internally propagating light propagating through the light guide plate 13 in the direction along the optical axis 11x, and the light emitting unit When the incident angle with respect to 13b exceeds the total reflection angle, the light is gradually emitted along the propagation direction in a manner of being emitted forward from the light emitting portion 13b. In addition, the light guide plate 13 is designed so that the luminance distribution obtained by the light emitted from the light emitting portion 13b is substantially uniform over the entire illumination range A due to the concavo-convex structure or the light scattering layer.

  In the present embodiment, the light guide plate 13 has an inclined surface portion 13d between the light incident surface 13a formed at the end portion and the light emitting portion 13b formed on the light emitting surface which is one surface. . The inclined surface portion 13 d is basically constituted by a portion on the light source 11 side of the light emitting portion 13 b on the light emitting surface which is one surface of the light guide plate 13. By providing the inclined surface portion 13d, the light guide plate 13 is configured to be thick on the light source 11 side and thin on the light emitting portion 13b side. As a result, the thickness of the light incident surface 13a substantially matches the thickness of the light emitting surface 11a of the light source 11. However, in the plane range where the light emitting portion 13b is provided, the thickness is the thickness of the light emitting surface 11a (usually 0. 5 to 1.0 mm). The light guide plate 13 has a substantially parallel plate shape in the plane range (illumination range A) where the light emitting portion 13b is provided.

  As shown in FIG. 2, the inclined surface portion 13d is configured such that the inclination angle θ (angle with respect to the optical axis 11x) decreases from the light incident surface 13a side toward the light emitting portion 13b side. That is, there is a high inclination angle portion on the light incident surface 13a side, and a low inclination angle portion on the light emitting portion 13b side. However, the connecting point between the inclined surface portion 13d and the light emitting portion 13b may have a discontinuity of the inclination angle θ, but is preferably configured so as not to have a step. This is because unnecessary refracted light due to a step is not generated.

  The inclination angle θ of the inclined surface portion 13d is 4 degrees on the light incident surface 13a side (high inclination angle portion), preferably more than 5 degrees, and 3 degrees on the light emitting portion 13b side (low inclination angle portion). Preferably, it is configured to be less than 2 degrees. This is because if the inclination angle θ is too small on the light incident surface 13a side, the effect of reducing the light shielding width 18x is reduced, and if the inclination angle θ is too large on the light emitting part 13b side, the luminance of the illumination range A is reduced. This is because the effect of improving the uniformity of the film becomes small.

  In the illustrated example, the inclination angle θ of the inclined surface portion 13d is configured as a concave curved surface that is continuously and smoothly reduced. The inclined surface portion 13d and the light emitting portion 13b are configured to be continuous surfaces. That is, the inclined surface portion 13d is connected to the light emitting portion 13b when the inclination angle θ gradually decreases toward the light emitting portion 13b and eventually the inclination angle θ becomes zero.

  Here, the concave curved surface shape of the inclined surface portion 13d is not particularly limited, and the contour of the cross-sectional shape from the light incident surface 13a toward the light emitting portion 13b is an arbitrary shape such as an arc shape, an elliptical arc shape, a parabolic shape, a hyperbolic shape, and the like. can do. However, in the present invention, the inclined surface portion 13d is not limited to a continuous concave curved surface, and for example, two or more flat portions having different inclination angles θ are provided, and these are provided on the light incident surface 13a side. It may have a shape that is discontinuously connected in such a manner that a surface with a large inclination angle θ is disposed and a surface with a small inclination angle θ is disposed on the light emitting portion 13b side.

  The light diffusion sheet 15 and the optical sheets of the light collecting sheets 16 and 17 are disposed on the light emitting portion 13b. These optical sheets (the total thickness of the whole is about 150 to 200 μm) are preferably arranged so as to be within the height range (about 200 to 300 μm) of the inclined surface portion 13d. Further, the light shielding sheet 18 has a light shielding portion 18a that covers the formation range of the inclined surface portion 13d. The light shielding width 18x of the light shielding portion 18e is preferably set so as to completely cover the entire inclined surface portion 13d. However, depending on the light emission mode of the edge B on the light source 11 side of the illumination range A described later. Alternatively, a portion of the inclined surface portion 13d on the low inclination angle side may not be covered and may be configured as a part of the illumination range A.

  The light shielding sheet 18 may be any material as long as it can shield the leaked light emitted from the inclined surface portion 13d (particularly, the high inclination angle portion). ) And a black light layer (viewing side) are preferably used in order to enhance the light shielding property. However, in the case of the present embodiment, when it is desired to remove the light emitted from the high inclination angle portion of the inclined surface portion 13d, the surface on the inclined surface portion 13d side should be black, for example, to have high light absorption. Is preferred.

  As shown in FIG. 2, the electro-optical panel 20 is obtained by bonding substrates 21 and 22 such as glass and plastic through a seal material (not shown) and placing an electro-optical material such as liquid crystal therebetween. . An electric field application structure (not shown) for applying an electric field to the electro-optical material is also provided. In the illustrated example, the substrate 21 is provided with a substrate overhanging portion 21T extending from the outer shape of the substrate 22, and a driving circuit 23 such as a driver IC and a wiring member 24 such as a flexible wiring substrate are mounted on the substrate overhanging portion 21T. Has been. The display area D of the electro-optical panel 20 is disposed so as to overlap the illumination range A of the illumination device 10.

  In the illuminating device 10 of the present embodiment, the high propagation angle (the propagation angle φ is the optical axis 11x) of the light emitted from the light source 11 and entering the light guide plate at the high inclination angle portion of the inclined surface portion 13d of the light guide plate 13. When the incident light is incident, the incident angle becomes equal to or smaller than the total reflection angle, and the leakage light Lo emitted from the light guide plate 13 to the outside increases due to the large inclination angle θ. On the other hand, in the low inclination angle portion, light having a high propagation angle has already been emitted in the high inclination angle portion and the inclination angle θ is small, so that the emitted light is reduced and light Li having a small propagation angle φ remains. Therefore, since light with a high propagation angle is less likely to be generated at the low inclination angle portion, as shown in FIG. 3, even if the light shielding width 18x is reduced, the edge B on the light source 11 side of the illumination range A as in the past is used. It is prevented that an eyeball spot is generated.

  In particular, the inclined surface portion 13d is formed as a concave surface that is continuous in such a manner that the inclination angle θ gradually decreases from the light incident surface 13a side toward the light emitting portion 13d side, resulting in discontinuity of the inclination angle θ. It is possible to avoid a change in brightness uniformity within the illumination range A. Further, since the inclined surface portion 13d is continuous with the light emitting portion 13b, the discontinuity of the inclination angle θ from the inclined surface portion 13d to the light emitting portion 13b can be eliminated. The luminance uniformity can be further improved.

  Here, in the conventional example and the comparative examples (FIGS. 5 to 8), a discontinuous refracting portion having an inclination angle θ always exists between the inclined surface portions 3d and 3d ′ and the light emitting portions 3b and 3b ′. For this reason, the edge of the illumination range A cannot be brought close to the inclined surface portions 3d and 3d ′ due to light scattering by the refracting portion, but in this embodiment, the inclined surface portion 3d and the light emitting portion 3b are continuous. By being configured as a surface, there is no discontinuity in the tilt angle, so there is no restriction in this sense.

  In the above embodiment, the end on the light incident surface 13a side of the inclined surface portion 13d coincides with the upper end corner of the light guide plate, but the same flat surface as the light emitting portion 13b on the light incident surface 13a side. The inclined surface portion 13d may be formed through such a portion.

  FIG. 4 is an enlarged partial sectional view showing a modification of the above embodiment. In this example, the light diffusing sheet 15 ′ is different from the above-described embodiment in that the light diffusing sheet 15 ′ projects from the light emitting portion 13 b onto the inclined surface portion 13 d. In this case, since the light diffusion sheet 15 ′ is disposed on the inclined surface portion 13d, the leaked light emitted from the inclined surface portion 13d can be diffused, so that the leaked light is not actively used ( For example, when the light is absorbed by the light shielding sheet 18, the influence of part of the leaked light returning to the light guide plate 13 can be further reduced, and the leaked light is actively used (for example, reflected by the light shielding sheet 18). However, when light having a high propagation angle is emitted, the light is converted into light having a low emission angle by diffusion, and is incident on the light guide plate 13 again by reflection or the like, thereby becoming light having a low propagation angle and uniform luminance distribution. Since it can be used as an effective illumination light component that hardly affects the performance, it is possible to increase the light use efficiency of the illumination device 10.

  Finally, an example of an electronic apparatus in which the electro-optical device 100 including the illumination device 10 and the electro-optical panel 20 is mounted will be described with reference to FIGS. 10 and 11.

  FIG. 10 is a schematic configuration diagram illustrating an overall configuration of a control system (display control system) for the electro-optical device 100 in the electronic apparatus. The electronic device shown here includes a display information output source 291, a display information processing circuit 292, a power supply circuit 293, a timing generator 294, and a light source control circuit 295 that supplies power to the backlight 10. 290. Further, the electro-optical device 100 is provided with the electro-optical panel 20 having the above-described configuration. The electro-optical panel 20 includes a drive circuit 23 and an illumination device (back) for illuminating the electro-optical panel 20. Light) 10 is provided. As shown in FIG. 1, the drive circuit 23 is composed of an electronic component (such as a semiconductor IC) that is directly mounted on the electro-optical panel 20. A circuit pattern formed on the surface or a semiconductor IC chip or a circuit pattern mounted on a circuit board (such as the wiring member 24) conductively connected to the electro-optical panel 20 can also be used.

  The display information output source 291 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. The display information is supplied to the display information processing circuit 292 in the form of an image signal or the like of a predetermined format based on various clock signals generated by the timing generator 294.

  The display information processing circuit 292 includes various 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 obtain image information. Are supplied to the drive circuit 23 together with the clock signal CLK. The drive circuit 23 includes a scanning line drive circuit, a signal line drive circuit, and an inspection circuit. The power supply circuit 293 supplies a predetermined voltage to each of the above-described components.

  The light source control circuit 295 supplies power to the light source 11 of the lighting apparatus 10 based on the voltage supplied from the power supply circuit 293, and controls whether or not the light source is turned on and its brightness based on a predetermined control signal. It has become.

  FIG. 11 shows a mobile phone which is an embodiment of an electronic apparatus according to the invention. A cellular phone 1000 shown here includes an operation unit 1001 provided with a plurality of operation buttons, a mouthpiece, and the like, and a display unit 1002 provided with a mouthpiece and the like, and the electro-optical device described above is provided inside the display unit 1002. 100 is incorporated. The display area D of the electro-optical device 100 can be visually recognized on the surface (inner surface) of the display unit 1002.

  In addition to the mobile phone shown in FIG. 11, examples of the electronic apparatus according to the present invention include a liquid crystal television, a car navigation device, a pager, an electronic notebook, a calculator, a workstation, a videophone, and a POS terminal. However, the present embodiment is particularly preferably a portable electronic device such as a mobile phone, a portable information terminal, or an electronic watch.

  Note that the present invention is not limited to the illustrated examples described above, and various modifications can be made without departing from the scope of the present invention.

1 is a schematic exploded perspective view of an electro-optical device according to an embodiment. The expanded partial longitudinal cross-sectional view which shows the structure of the light source vicinity of the illuminating device of embodiment. The schematic plan view which shows the planar shape of the illuminating device of embodiment with a luminance distribution. The expanded partial longitudinal cross-sectional view which shows the modification of embodiment. FIG. 10 is a schematic exploded perspective view of a conventional electro-optical device. The expanded partial longitudinal cross-sectional view which shows the structure of the light source vicinity of the conventional illuminating device. The schematic plan view which shows the planar shape of the conventional illuminating device with luminance distribution. The expanded partial longitudinal cross-sectional view which shows the structure of the light source vicinity of the illuminating device of a comparative example. The schematic plan view which shows the planar shape of the illuminating device of a comparative example with luminance distribution. The schematic block diagram which shows the structure of the display control system of an electronic device. The schematic perspective view which shows the external appearance of an electronic device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Illuminating device, 11 ... Light source, 11a ... Light emission surface, 11x ... Optical axis, 12 ... Light source substrate, 13 ... Light guide plate, 13a ... Light incident surface, 13b ... Light-emitting part, 13c ... Back surface, 13d ... Inclined surface , 14 ... reflective sheet, 15 ... light diffusion sheet, 16, 17 ... light collecting sheet, .theta .... tilt angle, .phi .... propagation angle.

Claims (7)

The light source is configured in a plate shape and has a light incident surface facing the light emission surface of the light source at the end, and emits light that is adjacent to the light incident surface and enters and propagates from the light incident surface. A light guide plate provided with a light output part at least in part on the light output surface side, and the light guide plate is disposed between the light input surface and the light output part on the light output surface side. In an illumination device comprising an inclined surface portion that is inclined in such a manner that the thickness of the light plate is thick on the light source side and thin on the light emitting portion side,
An illuminating device characterized in that an inclination angle formed between the surface of the light emitting part and the inclined surface part of the light guide plate is large on the light incident surface side and small on the light emitting part side.   2. The illumination device according to claim 1, wherein the inclined surface portion includes a concave curved surface in which the inclination angle continuously decreases from the light incident surface side toward the light emitting portion side. .   The lighting device according to claim 2, wherein the inclined surface portion and the light emitting portion are configured as a continuous surface.   4. The lighting device according to claim 1, wherein a light diffusion sheet is disposed on the light exit surface, and the light diffusion sheet is extended to further cover the inclined surface portion. 5.   The lighting device according to any one of claims 1 to 3, wherein a light shielding sheet that covers the inclined surface portion is disposed. The light source is configured in a plate shape and has a light incident surface facing the light emission surface of the light source at the end, and emits light that is adjacent to the light incident surface and enters and propagates from the light incident surface. A light guide plate provided with a light output part at least in part on the light output surface side, and the light guide plate is disposed between the light input surface and the light output part on the light output surface side. An inclination angle formed by the surface of the light emitting portion and the inclined surface portion of the light guide plate is provided with an inclined surface portion that is inclined in such a manner that the thickness of the light plate is thick on the light source side and thin on the light emitting portion side. Is large on the light incident surface side and small on the light emitting part side, and
An electro-optical panel in which a display region is disposed on the light emitting unit;
An electro-optical device comprising:   An electronic apparatus comprising the electro-optical device according to claim 6.

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