JP2007287789A - Lighting device, liquid crystal device, and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a lighting device constituted of a plurality of light sources of the same color in which unevenness of luminance or color of the lighting device is reduced as a whole even if the luminance or color of light varies among the light sources of the same color. <P>SOLUTION: The lighting device has a plurality of light sources 29 emitting light of the same color with different luminance and among the plurality of light sources 29 of the same color, the light exit range W2 of a light source 29b emitting light of high luminance is wider than the light exit range W1 of a light source 29a emitting light of low luminance. In this lighting device, when the light emitted from the low luminance light source 29a to the narrow range W1 and the light emitted from the high luminance light source 29b to the wide range W2 are mixed, difference in light intensity decreases and uniformity in quantity of the mixed light is enhanced. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to an illumination device that performs illumination using light generated by a light source. The present invention also provides:
The present invention relates to a liquid crystal device configured using the lighting device. The present invention also relates to an electronic device configured using the liquid crystal device.

Currently, liquid crystal devices are widely used in electronic devices such as mobile phones, PDAs (personal digital assistants), palmtop computers, liquid crystal televisions, and the like. For example,
A liquid crystal device is used to display various types of information of electronic devices as images. This liquid crystal device is usually provided with an illumination device for supplying light to the liquid crystal panel. In this lighting device, a light source including an LED (Light Emitting Diode) as a light emitter may be used.

When manufacturing the above light source, it is difficult to make the characteristics of the plurality of manufactured light sources uniform, and there may be a difference in color and brightness between light sources of the same color. Therefore, in a lighting device configured using a plurality of light sources, the color and luminance of light emitted from the lighting device may vary depending on the difference in the characteristics of the individual light sources.

By the way, as an illuminating device using a plurality of light sources, one having a structure in which the emission range of light emitted from each light source is different for each light source of different colors is known (for example, see Patent Document 1). ). According to this configuration, the difference in luminance between the light of different colors emitted from each light source is reduced, and the uniformity of the light quantity is improved.

JP 2005-196989 A (pages 9 to 10, FIG. 2)

However, in the illumination device disclosed in Patent Document 1, color unevenness and brightness unevenness between light sources of different colors are considered, but color unevenness and brightness unevenness due to a difference in characteristics between light sources of the same color are considered. Is not considered. Accordingly, in an illumination device configured using a plurality of light sources of one color, for example, an illumination device configured using a plurality of white light sources,
It has not been sufficient to prevent the occurrence of variation between whites having the same brightness and color of emitted light.

The present invention has been made in view of the above-described problems, and in an illumination device configured by using a plurality of light sources of the same color, there is a variation in light brightness and color between light sources of the same color. But
An object of the illumination device as a whole is to reduce luminance unevenness and color unevenness.

A first illumination device according to the present invention includes a plurality of light sources that emit light having the same color and different brightness, and a light source that emits light having high brightness among the plurality of light sources of the same color. This light emission range is characterized in that it is wider than the light emission range of a light source that emits light with low luminance.

In the illuminating device according to the present invention, as a plurality of light sources that emit light of the same color and different in luminance, for example, a blue LED that is a monochromatic light emitter is surrounded by a YAG-based (yttrium, aluminum, garnet) phosphor. Using multiple white light sources, B (blue),
It is possible to use a plurality of white light sources that integrally include three types of LEDs that emit monochromatic light of G (green) or R (red). There is also a mixture of monochromatic light sources among a plurality of white light sources. Some use a plurality of monochromatic light sources all of the same color. B, G
Alternatively, there may be used a plurality of three types of monochromatic light sources that emit R monochromatic light.

In general, in an illuminating device, it is originally desired that the luminance is uniform among a plurality of light sources of the same color. However, it is inevitable that the luminance varies due to a manufacturing error or the like. It is very troublesome to select an appropriate one from a plurality of light sources so that the luminance of the plurality of light sources is uniform.

In the first illuminating device according to the present invention having the above-described configuration, the light emission range of the light source that emits light with high luminance is changed to the light emission range of the light source that emits light with low luminance among a plurality of light sources of the same color. Widely set. In general, light emitted in a wide range is weaker than light emitted in a narrow range, so light emitted from a light source that emits light with low luminance to a narrow range and light source that emits light with high luminance When the light emitted in a wide range is mixed, the difference in light intensity between the lights becomes small, and the uniformity of the light quantity of the mixed light is improved. Therefore, the brightness of light emitted from the lighting device can be made uniform.

Further, by widening the light emission range of a light source that emits light with high luminance, it is possible to start mixing light emitted from a plurality of light sources from a position close to those light sources. This
In the first lighting device according to the present invention, light with no luminance unevenness can be emitted at a position close to the light source, so that the lighting device can be formed in a small size.

Next, in the first lighting device according to the present invention, it is desirable that the light source that emits light with high luminance and the light source that emits light with low luminance are arranged adjacent to each other. The light source that emits light with low luminance is preferably disposed between the light sources that emit light with high luminance. In any of these cases, the light emitted from each light source can be mixed evenly between the light source that emits light with high luminance and the light source that emits light with low luminance. It is possible to prevent unevenness in luminance.

Next, in the first illumination device according to the present invention, each of the light sources includes a light emitter that emits monochromatic light, and a light reflection surface that reflects light emitted from the light emitter in a predetermined direction. The angle of the light reflecting surface with respect to the light emitter is preferably different between a light source that emits light with high luminance and a light source that emits light with low luminance. According to this configuration, by changing the angle of the light reflecting surface, it is easy to widen the light emission range of the light source that emits light with high luminance and narrow the light emission range of the light source that emits light with low luminance. Can be done.

Next, in the first illuminating device according to the present invention, a lens is provided in the light emitting portion of each of the light sources, and the refractive index of the lens is a light source that emits light with high luminance and the luminance is low. It is desirable that the light source emits light. According to this configuration, since the emission range of light emitted from the light source can be varied by changing the refractive index of the lens, the light emission range of the light source that emits light with high luminance is widened, and the luminance is increased. It is possible to easily narrow the light emission range of the light source that emits low light.

Next, the second lighting device according to the present invention includes a plurality of light sources that emit light having the same color and different bluishness, and the blueness is strong among the plurality of light sources of the same color. The light emission range of the light source that emits light is wider than the light emission range of the light source that emits light with a weak bluishness.

In the second lighting device according to the present invention, as a lighting device that emits light of the same color and has a plurality of light sources having different bluish colors, for example, a blue LED that is a monochromatic light emitter is surrounded by a YAG phosphor. One using a plurality of white light sources, or one using a plurality of white light sources integrally including three types of LEDs that emit B, G, or R monochromatic light. There is also a mixture of monochromatic light sources among a plurality of white light sources. Some use a plurality of monochromatic light sources all of the same color. In addition, there is a type using a plurality of three types of monochromatic light sources that emit monochromatic light of B, G, or R.

Note that whether the bluish color is strong or the bluish color is weak depends on the configuration of the light source.
In the case of a light source using a plurality of monochromatic light emitters, the intensity of bluishness is whether the blue wavelength component is strong or weak on the spectrum. On the other hand, in the case of a light source using one monochromatic illuminant, the intensity of bluish is whether the wavelength component of the color of light emitted from the illuminant on the spectrum is offset or not offset to the blue wavelength portion. It is.

In general, “luminosity”, which is the brightness of light perceived by humans, differs depending on the color of the light. An example of a color having high visibility is blue. For this reason, among a plurality of lights of the same color, light with a strong bluish color has higher visibility than light with a light bluish color. That is, a human feels light emitted from a light source having a strong blue tint bright and feels light emitted from a light source having a weak blue tint dark. Temporarily, when unevenness of intensity is generated in blue between a plurality of light sources of the same color,
Unevenness occurs in the bluishness of light emitted from the lighting device. As a result, a person who visually recognizes the light emitted from the lighting device may feel that the luminance of the light emitted from the lighting device is uneven. Therefore, in the 2nd illuminating device which concerns on this invention, it decided to vary the light emission range of a light source according to the difference in blueness.

In the second illumination device according to the present invention having the above-described configuration, the light emission range of the light source that emits light with strong bluish light between the light sources of the same color is emitted from the light source that emits light with low bluish light. It was set wider than the range. In general, light emitted in a wide range is weaker than light emitted in a narrow range, so light emitted from a light source that emits light with a weak blue color and light with a strong blue color are emitted. When light emitted from a light source that emits light in a wide range is mixed, the difference in the color of light between the light is reduced, and the uniformity of the color of the mixed light is improved. Therefore, the bluishness of the light emitted from the lighting device can be made uniform.

In addition, by widening the light emission range of a light source that emits light with a strong bluishness, mixed light of light emitted from a plurality of light sources can be started from a position close to those light sources. Thereby, in the 2nd illuminating device which concerns on this invention, in the position close | similar to a light source, since it can radiate | emit the light without bluish nonuniformity, an illuminating device can be formed small.

Next, in the second lighting device according to the present invention, it is desirable that the light source that emits light with a strong blue tint and the light source that emits light with a weak blue tint be disposed adjacent to each other. Moreover, it is desirable that the light source that emits light with a weak bluish color be disposed between light sources that emit light with a strong bluish color. In any of these cases, the light emitted from each light source can be mixed evenly between the light source that emits light with strong bluish light and the light source that emits light with weak bluish light.
It is possible to prevent unevenness in the color of light emitted from the lighting device.

Next, in the second illumination device according to the present invention, each of the light sources includes a light emitter that emits monochromatic light, and a light reflecting surface that reflects light emitted from the light emitter in a predetermined direction. The angle of the light reflecting surface with respect to the light emitter is preferably different between the light source that emits light with a strong bluish color and the light source that emits light with a weak bluish color. According to this configuration, by changing the angle of the light reflection surface, the light emission range of the light source that emits light with strong bluishness is widened, and the light emission range of the light source that emits light with weak bluishness is narrowed. Can be done easily.

Next, in the second illuminating device according to the present invention, a lens is provided in the light emitting portion of each of the light sources, and the refractive index of the lens is such that the light source emitting the strong blue light and the blue tint are emitted. It is desirable that the light source be different from the light source that emits weak light. According to this configuration, since the emission range of light emitted from the light source can be varied by changing the refractive index of the lens, the light emission range of the light source that emits light with a strong bluish color is widened, It is possible to easily narrow the light emission range of the light source that emits light with low taste.

Next, in each lighting device according to the present invention, the light source may be a white light source having a blue light emitter and a phosphor covering the blue light emitter. The light source having this configuration is a light source that emits white light by mixing blue light emitted from a blue light emitter and light that is converted into yellow when the blue light hits the phosphor. As the phosphor, for example, YA
A G-based phosphor can be applied. Further, in each illumination device according to the present invention, the light source uses a white light source having a light emitter that emits blue light, a light emitter that emits green light, and a light emitter that emits each color of red. be able to. The light source having this configuration is a light source that emits white light by mixing blue light, green light, and red light.

Even when any of the above light sources is used, it is possible to prevent unevenness in the luminance of light emitted from the lighting device, or to prevent unevenness in the bluishness of light emitted from the lighting device. it can.

Next, in each lighting device according to the present invention, the lighting device further includes a light guide that emits light introduced from the light incident surface on the side surface from the light emitting surface, and the plurality of light sources includes a light emitting unit of the light source. It is desirable to be disposed so as to face the light incident surface of the light guide. The lighting device having this configuration is a so-called sidelight type lighting device. In this sidelight type illumination device, light emitted from each light source is introduced into the light guide, and the light is mixed inside the light guide and emitted from the light exit surface. This sidelight type illumination device is often used in, for example, a medium-sized or small-sized liquid crystal device.

When light emitted from each light source is introduced into the light guide, if the brightness or bluishness of each light source varies, the brightness or blue of the light emitted from the light exit surface of the light guide Unevenness in taste may occur. In addition, in order to prevent unevenness in brightness and blueness, the light incident surface of the light guide,
Alternatively, it is necessary to mix light from each light source in the vicinity of the light incident surface.

In the aspect of the present invention, the light emission range of the light source that emits light with high luminance can be widened, and the light emission range of the light source that emits light with low luminance can be narrowed. Therefore, the luminance of the light emitted from the light guide is uneven. Can be prevented. In addition, since the light emission range of the light source that emits light with high luminance can be widened, the mixed light of the light emitted from each light source can be started from a position close to the light emission part of those light sources. As a result, since the distance from the light incident surface of the light guide to the light source can be shortened, the lighting device can be formed in a small size. Therefore, the lighting device according to the aspect of the present invention can be suitably used for a medium-sized or small-sized liquid crystal device.

In addition, the light emission range of the light source that emits light with a strong blue tint can be widened, and the light emission range of the light source that emits light with a weak blue tint can be narrowed. It can be prevented from occurring. Moreover, since the light emission range of the light source that emits light with strong bluishness can be widened, the mixed light of the light emitted from each light source can be started from a position close to the light emission part of those light sources. As a result, since the distance from the light incident surface of the light guide to the light source can be shortened, the lighting device can be formed in a small size. Therefore, the lighting device according to the aspect of the present invention can be suitably used for a medium-sized or small-sized liquid crystal device.

Next, in each illuminating device according to the present invention, it is desirable that the plurality of light sources face the object to be illuminated and are arranged in a plane. In the aspect of the present invention, for example, a liquid crystal device can be considered as the object to be illuminated. In this case, the plurality of light sources are arranged in a plane facing the surface opposite to the display surface of the liquid crystal device. The illumination device having this configuration is a so-called direct illumination device.
Such direct type illumination devices are often used for large liquid crystal devices, for example.

In the aspect of the present invention, the light emission range of the light source that emits light with high luminance can be widened, and the light emission range of the light source that emits light with low luminance can be narrowed. Can be prevented. In addition, since the light emission range of the light source that emits light with high luminance can be widened, the mixed light of the light emitted from each light source can be started from a position close to the light emission part of those light sources. As a result, since the distance from the light source to the object to be illuminated can be shortened, the illumination device can be formed thin.

In addition, the light emission range of a light source that emits light with a strong blue tint can be widened, and the light emission range of a light source that emits a light with a weak blue tint can be narrowed. It can be prevented from occurring. Moreover, since the light emission range of the light source that emits light with strong bluishness can be widened, the mixed light of the light emitted from each light source can be started from a position close to the light emission part of those light sources. As a result, since the distance from the light source to the object to be illuminated can be shortened, the illumination device can be formed thin.

Next, a liquid crystal device according to the present invention includes a liquid crystal panel that displays an image, and an illumination device that is provided to face a surface of the liquid crystal panel opposite to the side on which the image is viewed, The lighting device is a lighting device having the above-described configuration. In this configuration, the liquid crystal panel is a panel structure that can change an optical output state by controlling electrical input conditions. In addition, the liquid crystal panel is a panel structure including liquid crystal, and realizes display using the electrical action of the liquid crystal. This liquid crystal panel is formed, for example, by sealing liquid crystal between a pair of substrates made of glass or the like.

The first illuminating device according to the present invention has a light emission range of a light source that emits light having a high luminance between a plurality of light sources of the same color as compared with a light emission range of a light source that emits light having a low luminance. Therefore, it is possible to prevent unevenness in the luminance of the light emitted from the lighting device. Therefore, even in the liquid crystal device according to the present invention, it is possible to prevent unevenness in display luminance of the liquid crystal panel.

Moreover, the 2nd illuminating device which concerns on this invention is the light emission range of the light source which radiates | emits the light emission range of the light source which radiates | emits light with a strong bluish light among the light sources of the same color of several light sources Therefore, it is possible to prevent unevenness in the color of the light emitted from the lighting device. Therefore, also in the liquid crystal device according to the present invention, it is possible to prevent the occurrence of unevenness in the blueness of the display on the liquid crystal panel.

Next, an electronic apparatus according to the present invention includes the liquid crystal device having the above-described configuration. The liquid crystal device according to the present invention can prevent the occurrence of luminance or bluish unevenness in the display of the liquid crystal panel by using a lighting device that suppresses the luminance or bluish unevenness of emitted light. Therefore, even in the electronic apparatus according to the present invention using this liquid crystal device, it is possible to prevent the display luminance or color from becoming uneven.

(First embodiment of illumination device and liquid crystal device)
Hereinafter, a first lighting device and a liquid crystal device according to the present invention will be described based on embodiments. Of course, the present invention is not limited to this embodiment. Further, in the following description, the drawings will be referred to as necessary. In this drawing, in order to show the important components of the structure composed of a plurality of components in an easy-to-understand manner, May be indicated by dimensions.

FIG. 1 shows a planar structure of a liquid crystal device according to the present invention. In FIG. 1, a sub-pixel D which is a unit area for display is schematically enlarged. One display pixel G is formed by three sub-pixels D adjacent to each other. 2 shows a cross-sectional structure of the liquid crystal panel and the illuminating device constituting the liquid crystal device. The liquid crystal panel shows a cross-sectional structure according to the Z1-Z1 line of FIG. 1, and the illuminating device is taken along the line Z2-Z2 of FIG. The following cross-sectional structure is shown.

In FIG. 2, the liquid crystal device 1 includes a liquid crystal panel 2 and a lighting device 3 attached to the liquid crystal panel 2. The liquid crystal panel 2 includes an element substrate 4 and a color filter substrate 5. The element substrate 4 and the color filter substrate 5 are bonded to each other with an annular seal material 7 as viewed from the direction of arrow A. This gap is a so-called cell gap. The cell gap is a number of spacers (not shown) provided between the element substrate 4 and the color filter substrate 5.
Held by. Liquid crystal is sealed in the cell gap to form a liquid crystal layer 8. As the liquid crystal, for example, a TN (Twisted Nematic) liquid crystal is used.

In FIG. 1, the element substrate 4 is provided on the back side of the paper, and the color filter substrate 5 is provided on the front side of the paper. The electrodes and wiring provided inside the liquid crystal panel 2 are elements that are not visible from the outside due to the presence of the color filter substrate 5, but in FIG.
Wiring and the like are indicated by solid lines.

In FIG. 2, the element substrate 4 has a translucent substrate 4a formed of translucent glass, translucent plastic, or the like, and a first polarizing plate 9a is attached to the outer surface of the translucent substrate 4a. It is worn. As shown in FIG. 1, a plurality of source lines 11, a plurality of gate lines 12, a plurality of TFT (Thin Film Transistor) elements 13 as switching elements, and a plurality of pixel electrodes are formed on the inner surface of the translucent substrate 4a. 14 is provided. The source line 11 and the gate line 12 are TF
It is formed of the same material as the conductive material that constitutes the T element 13. Also, the pixel electrode 14
Is formed of a transparent conductive material such as ITO (Indium Tin Oxide).

The element substrate 4 has a projecting portion 15 that projects outward from one side of the color filter substrate 5.
An external connection terminal 16 is provided at the side end of the overhang portion 15. Further, a driving IC 17 is mounted on the surface of the overhanging portion 15 using a known COG (Chip On Glass) technique.
A terminal (not shown) on the input side of the driving IC 17 is electrically connected to one end of the external connection terminal 16. An FPC (Flexible Printed Circuit) substrate 18 is mounted on the side edge of the overhanging portion 15, and the other end of the external connection terminal 16 is electrically connected to the wiring in the FPC substrate 18. The FPC board 18 is connected to a control circuit in an electronic device such as a mobile phone.

The plurality of source lines 11 extend in the column direction Y and are arranged in the row direction X at appropriate intervals. One end of each source line 11 on the extended portion 15 side is electrically connected to an output side terminal (not shown) of the driving IC 17. The plurality of gate lines 12 extend in the row direction X and are arranged in the column direction Y at appropriate intervals. One end of the extended wiring 12a extending from each gate line 12 on the extended portion 15 side is electrically connected to a terminal (not shown) on the output side of the driving IC 17.

Each of the plurality of TFT elements 13 is provided in the vicinity of a portion where the source line 11 and the gate line 12 intersect. Each terminal of the TFT element 13, which is a three-terminal switching element,
These are electrically connected to the source line 11, the gate line 12, and the pixel electrode 14, respectively. Each TFT element 13 and each pixel electrode 14 are provided in a region corresponding to each sub-pixel D.

A region surrounded by a chain line in which a plurality of display pixels G are arranged in a matrix in a row direction X and a column direction Y is a display region V. In this display region V, characters, numbers, figures, etc. An image is displayed. Note that a frame-shaped area within the plane area of the liquid crystal panel 2 and outside the display area V is a so-called frame area F that does not contribute to display.

The source line 11, the gate line 12, and the wiring extending from them formed on the element substrate 4 are not shown in FIG. 2. Further, the translucent substrate 4 which is a component of the element substrate 4
In addition to the TFT element 13 and the pixel electrode 14, the TFT element 13 and the pixel electrode 1 are formed on the inner surface of a.
An interlayer insulating film, an alignment film, and the like that electrically insulate 4 are provided, but these are not shown in FIG.

Next, in FIG. 2, the color filter substrate 5 has a light-transmitting substrate 5a formed of light-transmitting glass, light-transmitting plastic, or the like, and the second surface is formed on the outer surface of the light-transmitting substrate 5a. A polarizing plate 9b is attached. The polarization transmission axis of the second polarizing plate 9b and the polarization transmission axis of the first polarizing plate 9a on the element substrate 4 side are set to an appropriate relative angle corresponding to the type of liquid crystal driving mode.

On the inner surface of the translucent substrate 5a, a light shielding film 19 is provided in a stripe shape, that is, in a lattice shape in each of the row direction X and the column direction Y when viewed from the arrow A direction. The light shielding film 19 is formed at a position that partitions the sub-pixel D. In each region surrounded by the light shielding film 19, one colored film 21 of three colors B (blue), G (green), and R (red) is provided, and an overcoat film 22 is formed thereon. The common electrode 23 is further provided thereon. Regarding the colored film 21, when it is desired to distinguish between blue, green and red colors, 21B,
21G and 21R are used, and when it is simply indicated that the film is a colored film without distinguishing colors, it is expressed as a colored film 21.

The colored film 21 of each color of B, G, and R functions as a color filter for selectively transmitting light of a specific wavelength and realizing color display. The common electrode 23 is formed of a transparent conductive material such as ITO similarly to the pixel electrode 14 on the element substrate 4 side, and is provided over almost the entire surface of the color filter substrate 5. In FIG. 1, the common electrode 23 is electrically connected to one end of the wiring 24 in the corner region C of the sealing material 7. The other end of the wiring 24 is electrically connected to an output terminal corresponding to COM of the driving IC 17.

Next, in FIG. 2, the lighting device 3 includes a light guide 26 and a light source unit 27. Light source unit 27
3 includes a flexible substrate 28 having flexibility and a plurality of light sources 29 provided on the substrate 28. The flexible substrate 28 has a length that is substantially the same as or slightly longer than the side surface of the light guide 26 in FIG.

In the present embodiment, the light source 29 is a package-type light source mainly composed of a light emitter that emits monochromatic light and an insulator on which the light emitter is mounted. Here, a specific structure of the light source 29 will be described. FIG. 4A is a plan view of the light source 29 of FIG. FIG. 4B is a cross-sectional view according to line Z3-Z3 in FIG. The light source 29 is shown in FIG.
As shown to b), it has the insulator 31, LED32 as a light-emitting body, the transparent resin 41, and the lens 42. As shown in FIG.

The insulator 31 is formed of a resin or the like, for example, and has a mortar-shaped recess (that is, a recess having a shape in which the area of the open portion is wider than the area of the bottom surface). A light reflection surface 31a is formed inside the recess by forming a film by, for example, plating. The light reflecting surface 31a has a function of reflecting the light emitted from the LED 32 in a predetermined direction.
Specifically, the light emitted from the LED 32 can be reflected toward the light emitting unit 30.

The LED 32 is provided on the bottom surface 31 b of the insulator 31. In addition, since the cross-sectional view of the light source 29 shown in FIG. 4B shows a cross section according to the Z3-Z3 line in FIG.
Although only the red LED 32R is shown in FIG. 4B, actually, the red LED 32R that emits R (red) light, the green LED 32G that emits G (green) light, and B (blue). )
The blue LED 32 </ b> B that emits the light is installed on the bottom surface 31 b of the recess of the insulator 31.

On the bottom surface 31b of the insulator 31, a blue LED 32B, a green LED 32G, and a red LED 3
An electrode 33 and an electrode 34 are provided corresponding to each of 2R. These electrodes 33,
The external terminals 34 are connected to wiring (not shown) formed on the flexible substrate 28 of FIG. On the other hand, in FIG. 4B, the internal terminals of the electrodes 33, 34 are the LEDs 32B,
It is connected to 32G and 32R. For example, the anode 3 of the LEDs 32B, 32G, 32R
6 is connected to the electrode 33 via a wire 37a, and the cathode 38 is connected to the electrode 34 via a wire 37b.

The transparent resin 41 is filled in the space surrounded by the insulator 31, that is, the space inside the mortar-shaped recess. For example, an epoxy resin or a silicone resin can be used as the transparent resin 41. In addition, the lens 42 is provided in the opening part of the mortar-shaped recess of the insulator 31, that is, in the light emitting part 30 of the light source 29. The lens 42 refracts the light emitted from the LED 32 and reaches the light emitting unit 30, and can change the emission range of the light emitted from the light emitting unit 30. Changing the light emission range can be realized by changing the refractive index of the lens 42. In the present embodiment, it is possible to provide a lens 42 having a different refractive index corresponding to the luminance of light emitted from each light source 29. In FIG. 4B, the lens 42 is a convex lens, but a concave lens can be used instead.

For example, the blue LED 32B, the green LED 32G, and the red LED 32R in FIG.
It is driven by the drive circuit 44 shown in FIG. The drive circuit 44 supplies power to the LE.
It includes a D drive power supply unit 45, an LED drive unit 46 as a driver, a blue LED drive circuit 47, a green LED drive circuit 48, and a red LED drive circuit 49. The blue LED drive circuit 47 is connected to each blue LED 3 in the plurality of light sources 29 provided on the flexible substrate 28 of FIG.
2B is connected in series. 5 is connected in series with each green LED 32G in the plurality of light sources 29 provided on the flexible substrate 28 in FIG. 5 is connected in series with each red LED 32R in the plurality of light sources 29 provided on the flexible substrate 28 in FIG.

For example, as shown in FIG. 6, the blue LED drive circuit 47, the green LED drive circuit 48, and the red LED drive circuit 49 include a pulse voltage generation circuit 50 and a current limiting resistor R0 connected in series to the circuit 50. Have. The size of the current limiting resistor R0 is blue LED 32B, green L
It is determined based on the allowable value of the current that can be passed through the ED 32G and the red LED 32R. The pulse voltage generation circuit 50 generates the blue LED 3 in accordance with a command from the LED drive unit 46 of FIG.
A predetermined pulse current is supplied to 2B, green LED 32G, and red LED 32R. Further, the pulse voltage generation circuit 50 is configured so that each LED 32B, 32G is in accordance with a command from the LED drive unit 46.
, 32R to control the width and timing of the pulse current supplied to 32R. As can be seen from the circuit diagram of FIG. 5, the drive circuit 44 controls the current to the LED for each of the blue, green, and red colors.

If the pulse current as shown in FIG. 7 is supplied to the blue LED 32B by the blue LED driving circuit 47, the blue LED 32B emits light. Further, the green LED drive circuit 48 causes the green LE.
When a pulse current as shown in FIG. 7 is supplied to D32G, the green LED 32B emits light. Further, when a pulse current as shown in FIG. 7 is supplied to the red LED 32R by the red LED driving circuit 49, the red LED 32R emits light. Blue LED 32B, Green LED 32G and Red L
When the ED 32R emits light at the same time, light of each color of B, G, and R is mixed and white light is obtained as outgoing light.

Hereinafter, operations of the illumination device and the liquid crystal device having the above-described configuration will be described.
In FIG. 5, the blue LED drive circuit 47, the green LED drive circuit 48, and the red LED drive circuit 49 are operated, and the pulse current shown in FIG. 7 is supplied to the blue LED 32B, the green LED 32G, and the red LED 32R. As a result, the blue LED 32B, the green LED 32G, and the red LED 32R simultaneously emit light within a predetermined period in a predetermined pulse width within one frame period in the image display process.

At this time, white light in which light of each color of B, G, and R is mixed is emitted from the light source unit 27 of FIG. 2 and introduced into the light guide 26 from the light incident surface 26a of the light guide 26. The introduced light is repeatedly reflected on the light reflecting surface 26b, the light emitting surface 26c, and the end surface opposite to the light incident surface 26a of the light guide 26. When the light exceeds the critical angle on the light emitting surface 26c, the light is reflected. The light exits from the exit surface 26c. The emitted light is supplied to the liquid crystal panel 2 as planar light from the light emitting surface 26c.

In the liquid crystal panel 2, a voltage corresponding to the image signal is applied for each subpixel D between the pixel electrode 14 and the common electrode 23, and the orientation of the liquid crystal molecules in the liquid crystal layer 8 is controlled for each subpixel D. . For this reason, the light from the illumination device 3 supplied to the liquid crystal panel 2 is modulated for each sub-pixel D in the liquid crystal layer 8. The modulated light is restricted from passing through the polarizing plate 9b on the color filter substrate 5 side, so that an image is displayed in the display region V.

Hereinafter, the arrangement of the light sources 29 in FIG. 3 will be described.
FIG. 8A shows an example of the arrangement of the light sources 29 according to this embodiment. The light source 29 can be classified into two types, a low-intensity light source 29a and a high-intensity light source 29b, according to the difference in luminance. The low luminance light source 29a is a light source that emits light having a luminance lower than the luminance reference value. On the other hand, the high-intensity light source 29b is a light source that emits light having a brightness higher than the above-described reference value of brightness. Here, the luminance reference value is, for example, a design reference value of the light source 29 and is a target value of the luminance of the light emitted from the light source 29.

The difference in luminance between the low-intensity light source 29a and the high-intensity light source 29b is due to variations in luminance caused by, for example, a manufacturing error of the LED 32 in FIG. It should be noted that brightness variations are caused between the plurality of low brightness light sources 29a and between the plurality of high brightness light sources 29b shown in FIG. To do. That is, the plurality of low-luminance light sources 29a are within a luminance range lower than the reference value.
It includes individuals with high brightness and individuals with low brightness. The plurality of high-intensity light sources 29b also include individuals with high brightness and individuals with low brightness within a range of brightness higher than the reference value.

In FIG. 8A, the plurality of light sources 29 are arranged side by side in the row direction X on the flexible substrate 28. And the low-intensity light source 29a and the high-intensity light source 29b are arrange | positioned alternately from the left side of the figure. Specifically, a high luminance light source 29b is provided on the right side of the leftmost low luminance light source 29a. A low luminance light source 29a is provided to the right of the high luminance light source 29b. Hereinafter, similarly, the low luminance light source 29a and the high luminance light source 29b are alternately arranged in this order. That is, the low brightness light source 29a and the high brightness light source 29b are arranged adjacent to each other.

In FIG. 8A, the portion where the high-intensity light source 29b is arranged on the right side of the low-intensity light source 29a (for example, the portion indicated by the arrow C1) is “a light source that emits light with high luminance and luminance. 1 shows an embodiment in which a light source that emits low light is arranged next to each other. 3
A portion in which two light sources are arranged in the order of 29b, 29a, and 29b (for example, a portion indicated by an arrow C2) is “a light source that emits light having low luminance is disposed between light sources that emit light having high luminance. 1 illustrates an embodiment of a configuration.

The emission range of light emitted from each light source 29 is a range indicated by a chain line in FIG. In the present embodiment, the light emission range W2 of the high luminance light source 29b is set wider than the light emission range W1 of the low luminance light source 29a. That is, the light source 29b having a wide light emission range and the light source 29a having a narrow light emission range are arranged adjacent to each other. The same light emission range W1 is set between the plurality of light sources 29a. Further, the same light emission range W2 is set between the plurality of light sources 29b.

The light emission range of each light source 29 can be adjusted by changing the refractive index of the lens 42 provided in the light emission part 30 of the light source 29 in FIG. For example, in the high-intensity light source 29b of FIG. 8A, by setting the refractive index of the lens 42 of FIG. 4B to be large, a wide range from the light emitting unit 30 of FIG. 8A toward the outside. Light can be emitted to W2. On the other hand, in the low brightness light source 29a, by setting the refractive index of the lens 42 in FIG.
Light in a narrow range W1 can be emitted from the light emitting unit 30 in FIG. 8A toward the outside. Lens 42
Is set as described above, the light emission range W2 of the high-intensity light source 29b can be easily made wider than the light emission range W1 of the low-intensity light source 29a.

By the way, in the conventional illuminating device, it is difficult to make the characteristics of a plurality of light sources uniform when manufacturing a light source, and there may be a difference in color and luminance between light sources of the same color. For this reason, in a conventional lighting device configured using a plurality of light sources, the color and luminance of light emitted from the lighting device may vary depending on the difference in the characteristics of the individual light sources.

On the other hand, in the illumination device of the present embodiment, as shown in FIG. 8A, a high-intensity light source that emits light with high luminance between a plurality of light sources 29 of the same color (white in the present embodiment). The light emission range W2 of 29b is set wider than the light emission range W1 of the low luminance light source 29a that emits light with low luminance. In general, the light emitted in the wide range W2 is weaker than the light emitted in the narrow range W1, so the light emitted from the low luminance light source 29a to the narrow range and the light emitted from the high luminance light source 29b to the wide range. When light is mixed, the difference in intensity between the lights is reduced, and the uniformity of the light quantity of the mixed light is improved. Therefore, the luminance of the light L emitted from the illumination device 3 of FIG. 2 can be made uniform over the entire area of the light exit surface 26c. Therefore, in the liquid crystal device 1 of FIG. 2 provided with the illumination device 3, it is possible to prevent unevenness in display luminance of the liquid crystal panel 2.

Further, in FIG. 8A, the light emission range W <b> 2 of the high-intensity light source 29 b is widened, so that the mixed light of the light emitted from the plurality of light sources 29 can be started from a position close to the light sources 29.
That is, the distance t0 from the light emitting part 30 of the light source 29 to the position where the light emitted from the plurality of light sources 29 is mixed can be shortened. Thereby, in the illuminating device 3 of this embodiment, since the light without a brightness nonuniformity can be radiate | emitted in the position near the light source 29, the illuminating device 3 can be formed small.

(Modification)
In the above embodiment, when the plurality of low-intensity light sources 29a in FIG. 8A include a high-intensity individual and a low-intensity individual, and the plurality of high-intensity light sources 29b include a high-intensity individual and a low-intensity individual. As an example, However, the present invention can also be applied to the case where the variation in luminance is small between the plurality of low-intensity light sources 29a and between the plurality of high-intensity light sources 29b or the luminance is uniform.

In the above embodiment, the light emission range W1 is set to the same range among the plurality of low-luminance light sources 29a. Also, the light emission range W2 is set to the same range among the plurality of high-intensity light sources 29b. However, the individual low-intensity light sources 29a
The light emission ranges may be different depending on the luminance variation. Further, the light emission ranges may be varied depending on the luminance variation of the individual high-intensity light sources 29b. By so doing, the luminance of the light L emitted from the illumination device 3 of FIG. 2 can be made more uniform.

In the above embodiment, the light emission range of the light source 29 is adjusted by changing the refractive index of the lens 42 shown in FIG. However, the light emission range of the light source 29 can also be adjusted by changing the angle of the light reflecting surface 31a with respect to the LED 32. For example, in the high-intensity light source 29b of FIG. 8A, the angle of the light reflecting surface 31a is increased so that the opening of the concave portion shown in FIG. By
Light can be emitted from the light emitting part 30 to the outside in a wide range W2. On the other hand, in the low-intensity light source 29a of FIG. 8A, the light reflecting surface 3 so that the light emitting portion 30 shown in FIG.
By reducing the angle 1a, light can be emitted in a narrow range W2 from the light emitting unit 30 to the outside.

In the above embodiment, as shown in FIG. 4, a package-type light source including a blue LED 32B, a green LED 32G, and a red LED 32R is used as the light source. In this package type light source, white light is obtained by mixing light of each color emitted from each of the LEDs 32B, 32G, and 32R. However, a white light source having a configuration other than the above can also be used for the illumination device in each of the above embodiments. For example, a white light source 39 shown in FIG. 9 can be used. The white light source 39 is a white light source including a YAG phosphor and a blue LED.

FIG. 9A shows a planar configuration of the white light source 39. Also, FIG. 9B is a diagram of FIG.
It is sectional drawing according to the Z4-Z4 line of (a). As shown in FIG. 9B, the white light source 39 includes an insulator 31, a blue LED 32B that is a monochromatic light emitter, electrodes 33 and 34, a transparent resin 41, a plurality of YAG phosphors 40, and a lens. 42. Insulator 31, electrode 33,
The lens 34 and the lens 42 can have the same structure as the light source 29 shown in FIG.

In FIG.9 (b), the insulator 31 has a mortar-shaped recessed part, and blue LED32B is provided on the bottom face 31b of the mortar-shaped recessed part. As shown in FIG. 9A, the light source 39 is
It has only one blue LED 32B as a monochromatic light emitter. The blue LED 32B is shown in FIG.
As shown in (b), the anode 36 of the LED 32B is connected to the electrode 33 via a wire 37a.
The cathode 38 is connected to the internal terminal of the electrode 34 through the wire 37b. The transparent resin 41 is filled in the space inside the recess of the insulator 31.
A plurality of YAG phosphors 40 are contained in a dispersed state inside the transparent resin 41.

When the blue LED 32B emits light, part of the blue light is emitted to the outside, and the other part is Y.
It is absorbed by the AG-based phosphor 40 and becomes yellow light, which is a complementary color of blue light, and is emitted to the outside. Then, by mixing these blue light and yellow light, white light can be obtained as outgoing light.

Next, in the above embodiment, the light source unit 27 in FIG. 8A is the light source 29 shown in FIG.
A case in which a plurality of light sources that emit white light, such as a light source 39 shown in FIG. However, the light source unit 27 includes B, G in a plurality of white light sources.
, R, etc. can also be mixed and configured. Moreover, it can also comprise using the several monochromatic light source of all the same colors. In addition, B, G or R monochromatic light is emitted 3
A plurality of types of monochromatic light sources may be used.

(Second Embodiment of Lighting Device and Liquid Crystal Device)
Next, other embodiments of the first lighting device and the liquid crystal device according to the present invention will be described. In the present embodiment, an arrangement different from that of the first embodiment is used for the plurality of light sources 29 in FIG. FIG. 8B shows an arrangement of the light sources 29 in the light source unit 27 which is a main part of the first illumination device and the liquid crystal device according to the present embodiment. In the present embodiment, a plurality of light sources 2
9 is a low-brightness light source 29a that emits light with low brightness between a pair of high-brightness light sources 29b and 29b that are provided on the flexible substrate 28 and emit light with high brightness among the light sources 29.
Are arranged two by two.

In FIG. 8B, the portion where the high-intensity light source 29b is arranged on the right side of the low-intensity light source 29a (for example, the portion indicated by the arrow E1) is “a light source that emits light with high luminance and luminance. 1 shows an embodiment in which a light source that emits low light is arranged next to each other. 4
A portion in which two light sources are arranged in the order of 29b, 29a, 29a, 29b (for example, an arrow E
2) shows an embodiment of a configuration in which “a light source that emits light with low luminance is arranged between light sources that emit light with high luminance”.

Also in the present embodiment, the light emission range W2 in the high luminance light source 29b is set wider than the light emission range W1 in the low luminance light source 29a, as in the first embodiment. In general, the light emitted in the wide range W2 is weaker than the light emitted in the narrow range W1, so the light emitted from the low luminance light source 29a to the narrow range and the light emitted from the high luminance light source 29b to the wide range. When light is mixed, the difference in intensity between the lights is reduced, and the uniformity of the light quantity of the mixed light is improved. Therefore, the luminance of the light L emitted from the illumination device 3 in FIG. 2 can be made uniform throughout the illumination device 3. Therefore, in the liquid crystal device 1 of FIG. 1 provided with the illumination device 3, it is possible to prevent the display luminance of the liquid crystal panel 2 from being uneven.

Further, in FIG. 8B, the light emission range W <b> 2 in the high-intensity light source 29 b is widened, so that the mixed light of the light emitted from the plurality of light sources 29 can be started from a position close to the light sources 29. That is, the distance t1 from the light emitting part 30 of the light source to the position where the light emitted from the plurality of light sources 29 is mixed can be shortened. Therefore, the illumination device 3 can be formed in a small size.

(Third embodiment of illumination device and liquid crystal device)
Next, an embodiment of a second illumination device and a liquid crystal device according to the present invention will be described. In the present embodiment, the configuration of the liquid crystal device including the lighting device is the same as that of the liquid crystal device 1 shown in FIGS. 1 and 2 except for the arrangement of the light sources in the lighting device, and thus detailed description thereof is omitted. To do. In the present embodiment, the same components as those in the first embodiment will be described with the same reference numerals.

In the first embodiment, in FIG. 8A, the arrangement and the light emission range of the light sources 29 that emit white light by the monochromatic light emitters of B, G, and R are set according to the luminance difference of the light sources 29. The case of setting is illustrated. Specifically, the high-intensity light source 29b and the low-intensity light source 29a are arranged so as to be adjacent to each other, and the light emission range is made different between the light sources 29a and 29b. On the other hand, in this embodiment, the case where the arrangement | sequence of the light source 29 and the light emission range are set based on the difference in the color of the light source 29, especially the difference in blueness is illustrated.

Here, the reason for selecting the bluish color is mainly because of the difference in “visibility”. Visibility, which is the brightness of light perceived by humans, varies depending on the color of the light. An example of a color having high visibility is blue. For this reason, among a plurality of lights of the same color, light with a strong bluish color has higher visibility than light with a light bluish color. That is, a human feels light emitted from a light source having a strong blue tint bright and feels light emitted from a light source having a weak blue tint dark. If unevenness in bluish intensity occurs between a plurality of light sources of the same color, unevenness occurs in the bluishness of light emitted from the lighting device. As a result, a person who visually recognizes the light emitted from the lighting device may feel that the luminance of the light emitted from the lighting device is uneven. for that reason,
By correcting the bluish unevenness among a plurality of light sources of the same color, the amount of light emitted from the illumination device can be made uniform as in the case of correcting the luminance unevenness.

Also in this embodiment, the arrangement of the light sources 29 will be described with reference to FIG. Light source 2
9 can be classified into two types, a light source 29a having a weak blueness and a light source 29b having a strong blueness, based on the difference in blueness. The light source 29a having a weak blueness is a light source that emits light having a blueness that is weaker than a reference value of the color. On the other hand, the light source 29b having a strong blue tint is a light source that emits light having a blue tint stronger than the reference value of the color. Here, the blue reference value is, for example, the design reference value of the light source 29 and is a target value for the blue color of light emitted from the light source 29.

The light source 29 used in the present embodiment is a light source using a plurality of monochromatic light emitters. In the light source having this configuration, whether the bluish color is strong or the bluish color is weak is whether the blue wavelength component is strong or weak on the spectrum of light emitted from the light source.

The difference in color between the light source 29a having a weak blue color and the light source 29b having a strong blue color is, for example, the light source 2
9 due to variations in color caused by manufacturing errors or the like of the LED 32 shown in FIG. Note that variations in color due to manufacturing errors or the like of the LEDs 32 in FIG. 3 also occur between the light sources 29a having a weak bluish color and between the light sources 29b having a strong bluish color shown in FIG. Assume that it has occurred. That is, the plurality of light sources 29a having a weak blueness include individuals having a strong blueness and individuals having a weak blueness within a range of colors that are weaker than the reference value. In addition, the plurality of light sources 29b having a strong blue tint include individuals having a strong blue tint and individuals having a weak blue tint within a range of tints stronger than the reference value.

In FIG. 8A, the plurality of light sources 29 are arranged side by side in the row direction X on the flexible substrate 28. A light source 29a having a weak blueness and a light source 29 having a strong blueness are sequentially arranged from the left side of the figure.
b are alternately arranged. Specifically, a light source 29b with a strong bluish color is provided right next to a light source 29a with a weak bluish color located on the leftmost side. A light source 29a with a weak bluish color is provided to the right of the light source 29b with a strong bluish color. Similarly, the light sources 29a having a weak blueness and the light sources 29b having a strong blueness are alternately arranged in this order. That is, the light source 29a having a weak bluish color and the light source 29b having a strong bluish color are arranged adjacent to each other.

In FIG. 8A, a portion (for example, a portion indicated by an arrow C1) in which a light source 29b having a strong bluish color is disposed on the right side of a light source 29a having a weak bluish color “emits light having a strong blue color. The light source that emits light and the light source that emits light with low bluishness are arranged next to each other ".
Further, a portion in which three light sources are arranged in the order of 29b, 29a, 29b (for example, arrow C
2) shows an embodiment of a configuration in which “a light source that emits light with a weak bluish color is disposed between light sources that emit light with a strong bluish color”.

In the present embodiment, the light emission range W2 of the light source 29b having a strong bluish color is used as the light source 2 having a low bluish color.
It is set wider than the light emission range W1 of 9a. That is, the light source 2 having a wide light emission range.
9b and a light source 29a having a narrow light emission range are arranged adjacent to each other.

The light emission range of each light source 29 is the same as that of the first embodiment in FIG.
This can be adjusted by changing the refractive index of the lens 42 provided in the light emitting portion 30 of the lens. For example, in the light source 29b with a strong bluish color shown in FIG. 8A, by setting the refractive index of the lens 42 shown in FIG. 4B to be large, the light emitting unit 30 shown in FIG. Light can be emitted over a wide range W1. On the other hand, in the light source 29a with weak bluishness, by setting the refractive index of the lens 42 in FIG. 4B to be small, a narrow range W from the light emitting part 30 in FIG. 8A toward the outside.
2 light can be emitted. If the refractive index of the lens 42 is set as described above, the light source 2 with strong bluishness
It can be easily realized that the light emission range W2 in 9b is wider than the light emission range W1 in the light source 29a having a weak bluish tint.

As described above, in the illuminating device 3 of the present embodiment, as shown in FIG. 8A, the light of the light source 29b having a strong bluish color among a plurality of light sources 29 of the same color (white in the present embodiment). The emission range W2 is set wider than the light emission range W1 of the light source 29a having a weak blueness. In general, the light emitted in the wide range W2 has a lower intensity than the light emitted in the narrow range W1, and thus the light source 29 having a weak blueness.
When light emitted in a narrow range from a and light emitted in a wide range from a light source 29b having a strong bluish color are mixed, the difference in color between the lights becomes small, and the mixed light The uniformity of color tone is improved. Therefore, the bluishness of the light L emitted from the illumination device 3 of FIG.
It can be made uniform over the entire area of c. Therefore, in the liquid crystal device 1 of FIG. 2 provided with the illumination device 3, it is possible to prevent the occurrence of unevenness in the display color of the liquid crystal panel 2.

Further, in FIG. 8A, the light emission range W <b> 2 in the light source 29 b that emits light having a strong bluish color is widened so that the mixed light of the light emitted from the plurality of light sources 29 is close to the light sources 29. You can start with That is, the distance t0 from the light emitting part 30 of the light source 29 to the position where the light emitted from the plurality of light sources 29 is mixed can be shortened. Thereby, in the illuminating device 3 of this embodiment, since it is possible to emit light with no bluish unevenness at a position near the light source 29, the illuminating device 3 can be formed in a small size.

(Modification)
In the third embodiment described above, when the plurality of light sources 29a having a weak bluish color in FIG. 8A include individuals having a strong bluish color and individuals having a weak bluish color, and a plurality of light sources 29b having a strong bluish color are blue. The case where an individual with a strong taste and an individual with a weak blueness were included was illustrated. However, according to the present invention, when the variation in bluish color is small between the light sources 29a having a weak bluish color and between the light sources 29b having a strong bluish color, or the bluish color is uniform. It can also be applied to cases.

Moreover, in 3rd Embodiment, those light emission range W1 is set to the same range among the some light sources 29a with a weak bluishness. Also, the light emission range W2 is set to the same range even between the plurality of light sources 29b having a strong blue tint. However, the light emission ranges may be varied according to the bluish variation of the light sources 29a having a weak bluishness. Further, the light emission range may be varied depending on the bluish variation of the light source 29b having a strong bluish color. By so doing, the bluishness of the light L emitted from the illumination device 3 of FIG. 2 can be made more reliable and uniform.

In the third embodiment, by changing the refractive index of the lens 42 shown in FIG.
The light emission range of the light source 29 is adjusted. However, the light emission range of the light source 29 can also be adjusted by changing the angle of the light reflecting surface 31a with respect to the LED 32. For example, in the light source 29b having a strong bluish color shown in FIG. 8A, the angle of the light reflecting surface 31a is increased so that the opening of the recess shown in FIG. By doing so, light can be emitted in a wide range W2 from the light emitting unit 30 to the outside. On the other hand, in the light source 29a having a weak bluish color in FIG. 8A, the light emitting portion 30 is reduced by reducing the angle of the light reflecting surface 31a so that the light emitting portion 30 shown in FIG. Range W2 from outside to outside
Can emit light.

In the third embodiment, as a light source, as shown in FIG. 4, a blue LED 32B, a green L
A package-type light source including an ED 32G and a red LED 32R is used. In this package type light source, white light is obtained by mixing light of each color emitted from each of the LEDs 32B, 32G, and 32R. However, a white light source having a configuration other than the above can also be used for the lighting device. For example, a white light source as shown in FIG. 9, that is, a white light source 39 in which a YAG phosphor is provided in the light emission region of a blue LED can be used.

In the third embodiment, the light source unit is a package type light source such as the light source 29 shown in FIG. 4 or the light source 39 shown in FIG. 9 and is configured by using a plurality of light sources that emit white light. . However, the light source unit can also be configured by mixing monochromatic light sources such as B, G, and R in a plurality of white light sources. Moreover, it can also comprise using the several monochromatic light source of all the same colors. Further, a plurality of three types of monochromatic light sources that emit B, G, or R monochromatic light can be used.

(4th Embodiment of an illuminating device and a liquid crystal device)
Next, other embodiments of the second illumination device and the liquid crystal device according to the present invention will be described. In the present embodiment, an arrangement different from that of the third embodiment is used for the plurality of light sources 29 in FIG. FIG. 8B shows another example of the arrangement of the light sources 29 in the light source unit 27 that is a main part of the second illumination device and the liquid crystal device according to the present embodiment. In the present embodiment, the plurality of light sources 29 are provided on the flexible substrate 28, and light having a weak blueness is emitted between a pair of light sources 29 b and 29 b that emit light having a strong blueness. Light source 29a
Are arranged two by two.

In FIG. 8B, a portion (for example, a portion indicated by an arrow E1) in which a light source 29b having a strong bluish color is arranged on the right side of a light source 29a having a weak bluish color “emits light having a strong blue color. The light source that emits light and the light source that emits light with low bluishness are arranged next to each other ".
Further, a portion where four light sources are arranged in the order of 29b, 29a, 29a, and 29b (for example, a portion indicated by an arrow E2) is “a light source that emits light with a weak bluish color emits light with a strong bluish color. FIG. 2 illustrates an embodiment of a configuration that is “placed between light sources”.

Also in the present embodiment, the light emission range W2 of the light source 29b having a strong bluish color is set wider than the light emission range W1 of the light source 29a having a low bluish color, as in the third embodiment. In general, the light emitted in the wide range W2 has a lower intensity than the light emitted in the narrow range W1, so that the light emitted in the narrow range from the light source 29a having a weak bluish color and the light source 29 having a strong bluish color are emitted.
When light emitted in a wide range from b is mixed, the difference in intensity between the lights is reduced, and the uniformity of the color of the mixed light is improved. Therefore, the bluishness of the light L emitted from the illumination device 3 in FIG. 2 can be made uniform throughout the illumination device 3. Therefore, this lighting device 3
In the liquid crystal device 1 of FIG. 1 having the above, it is possible to prevent unevenness in the display color of the liquid crystal panel 2.

Further, in FIG. 8B, the light emission range W <b> 2 in the light source 29 b with a strong bluish color is widened so that the mixed light of the light emitted from the plurality of light sources 29 can be started from a position close to the light sources 29. That is, the distance t1 from the light emitting part 30 of the light source to the position where the light emitted from the plurality of light sources 29 is mixed can be shortened. Therefore, the illumination device 3 can be formed in a small size.

(Fifth embodiment of illumination device and liquid crystal device)
FIG. 10 shows still another embodiment of the first illumination device and the liquid crystal device according to the present invention. In the previous embodiment described with reference to FIGS. 1 and 2, as shown in FIG.
Is used on the side surface of the light guide 26, a so-called sidelight type lighting device. On the other hand, the liquid crystal device 51 of the present embodiment shown in FIG. 10 uses a so-called direct-type illumination device of a type in which a light source unit is provided so as to face almost the entire surface of the liquid crystal panel 52 that is an object to be illuminated. ing.

The illumination device 53 of the present embodiment includes a light reflection plate 54, a light source unit 57, a light scattering plate 55, and a first
The light collecting plate 56a and the second light collecting plate 56b. The light reflecting plate 54, the light source unit 57, the light scattering plate 55, the light collecting plate 56a, and the light collecting plate 56b are housed in a casing 59 so as to overlap each other as shown in FIG. A liquid crystal panel 52 is provided on the light collector 56b. As the liquid crystal panel 52, for example, the liquid crystal panel 2 shown in FIGS. 1 and 2 is used.

12A and 12B show an example regarding the arrangement of the light sources 62. FIG. FIG.
In (a), the light source unit 57 is formed by arranging a plurality of strip-shaped, that is, single-row light source units 63 in parallel in a plane. Each single-row light source unit 63 includes a flexible substrate 58 and a plurality of light sources 62 provided on the substrate 58. The plurality of light sources 62 are arranged in a straight line on each flexible substrate 58, and are arranged in a matrix in the vertical direction and the horizontal direction when the plurality of flexible substrates 58 are arranged in parallel. The light source 62 has the same structure as the package type light source 29 shown in FIG.

In the liquid crystal device 51 of the present embodiment shown in FIG. 10, when performing display, for example, as shown in FIG. 7, the blue LED 32B, the green LED 32G, and the red LED 32R in the light source 62 have a pulse width for a predetermined period in one frame period. Emits light according to control. Thereby, planar light is directly irradiated to the liquid crystal panel 52 from the illuminating device 53 of FIG.

In the present embodiment, when the light source unit 63 is viewed from the side in FIG. 12B, the plurality of light sources 62 are arranged side by side in the row direction X on the flexible substrate 58. And the low-intensity light source 62a and the high-intensity light source 62b are arrange | positioned alternately from the left side of the figure. Specifically, a high luminance light source 62b is provided on the right side of the leftmost low luminance light source 62a. A low brightness light source 62a is provided on the right side of the high brightness light source 62b. Hereinafter, similarly, the low luminance light source 62a and the high luminance light source 62b are alternately arranged in this order. That is, the low luminance light source 62a and the high luminance light source 62b are arranged adjacent to each other.

On the other hand, when the light source unit 63 is viewed in plan in FIG.
As for the arrangement of the high-intensity light sources 62b, for example, in the row direction X, the low-intensity light sources 62a and the high-intensity light sources 62b are alternately arranged one by one, and are adjacent to each other in both the row direction X and the column direction Y. The arrangement is not in line with each other.

In FIG. 12B, the portion where the high-intensity light source 62b is arranged on the right side of the low-intensity light source 62a (for example, the portion indicated by the arrow F1) is “a light source that emits light with high luminance and luminance. 1 shows an embodiment in which a light source that emits low light is arranged next to each other. Also,
A portion in which three light sources are arranged in the order of 62b, 62a, 62b (for example, a portion indicated by an arrow F2) is “a light source that emits light with low luminance is disposed between light sources that emit light with high luminance. Shows an embodiment of a "to be" configuration.

In the arrangement state as described above, the light emission range W2 in the high luminance light source 62b is set wider than the light emission range W1 in the low luminance light source 62a. In general, wide range W
2 is weaker than the light emitted in the narrow range W1, so that the light emitted from the low luminance light source 62a to the narrow range and the light emitted from the high luminance light source 62b to the wide range are mixed. When light is emitted, the difference in intensity between the lights is reduced, and the uniformity of the light quantity of the mixed light is improved. Therefore, the luminance of the light emitted from the lighting device 53 of FIG.
Can be made uniform throughout. Therefore, in the liquid crystal device 51 provided with the illumination device 53, it is possible to prevent the display luminance of the liquid crystal panel 52 from being uneven.

In FIG. 12B, the light emission range W <b> 2 in the high-intensity light source 62 b is widened, so that the mixed light of the light emitted from the plurality of light sources 62 can be started from a position close to the light sources 62. That is, the distance t2 from the light emitting part 30 of the light source to the position where the light emitted from the plurality of light sources 62 is mixed can be shortened. Accordingly, in the illumination device 53 of FIG. 10, light with no luminance unevenness can be emitted at a position close to the light source 62, so that the illumination device 53 can be formed thin.

(6th Embodiment of an illuminating device and a liquid crystal device)
Next, still another embodiment of the first lighting device and the liquid crystal device according to the present invention will be described. In the present embodiment, an arrangement different from that of the previous fifth embodiment is used with respect to the arrangement of the plurality of light sources 62 in FIG. FIGS. 13A and 13B show the arrangement of the light sources 62 in the light source unit 63 which is the main part of the first illumination device and the liquid crystal device according to the present embodiment. In FIG. 13B, a plurality of light sources 62 are provided on a flexible substrate 58, and two low-intensity light sources 62a are disposed between a pair of high-intensity light sources 62b and 62b. .

On the other hand, when the light source unit 63 is viewed in a plan view in FIG.
With respect to the arrangement of the high-intensity light sources 62b, for example, two low-intensity light sources 62a are arranged between the two high-intensity light sources 62b in the row direction X, and low in both the row direction X and the column direction Y. The luminance light source 62a and the high luminance light source 62b are arranged so as not to be adjacent to each other as much as possible.

In FIG. 13B, the portion where the high-intensity light source 62b is arranged on the right side of the low-intensity light source 62a (for example, the portion indicated by the arrow G1) is “a light source that emits light with high luminance and luminance. 1 shows an embodiment in which a light source that emits low light is arranged next to each other. Also,
A portion in which four light sources are arranged in the order of 62b, 62a, 62a, 62b (for example, a portion indicated by an arrow G2) is “a light source that emits light with low luminance is between light sources that emit light with high luminance. FIG. 2 illustrates an embodiment of a configuration that is “disposed in”.

Also in the present embodiment, the light emission range W2 of the high-intensity light source 62b is set to the low-intensity light source 6b.
It was set wider than the light emission range W1 in 2a. Generally, the light emitted in the wide range W2 has a lower intensity than the light emitted in the narrow range W1, so that the light emitted from the low luminance light source 62a to the narrow range and the high luminance light source 62b emitted to the wide range. When light and light mix
The difference in intensity between these lights is reduced, and the uniformity of the light quantity of the mixed light is improved. Therefore, the brightness of the light emitted from the illumination device 53 in FIG. 10 can be made uniform throughout the illumination device 53. Therefore, in the liquid crystal device 51 of FIG. 10 provided with the illumination device 53, it is possible to prevent unevenness in display luminance of the liquid crystal panel 52.

In FIG. 13B, the light emission range W <b> 2 in the high-intensity light source 62 b is widened, so that the mixed light of the light emitted from the plurality of light sources 62 can be started from a position close to the light sources 62. That is, the distance t3 from the light emitting unit 30 of the light source to the position where the light emitted from the plurality of light sources 62 is mixed can be shortened. Therefore, the illumination device 53 can be formed thin.

(7th Embodiment of an illuminating device and a liquid crystal device)
Next, still another embodiment of the second illumination device and the liquid crystal device according to the present invention will be described. In the present embodiment, the configuration of the liquid crystal device including the illumination device is the same as that of the liquid crystal device 51 shown in FIG. 10 except for the arrangement of the light sources in the illumination device, and thus detailed description thereof is omitted. Further, in the present embodiment, the same components as those in the previous embodiment will be described with the same reference numerals.

In the previous fifth embodiment, the case where the arrangement of the light sources 62 and the light emission range are set based on the difference in luminance of the light sources 62 in FIG. 12A and FIG. In particular,
The high-intensity light source 62b and the low-intensity light source 62a are arranged adjacent to each other, and these light sources 6
The light emission range is different between 2a and 62b. On the other hand, in this embodiment, the case where the arrangement | sequence of the light source 62 and the light emission range are set based on the difference in the color of the light source 62, especially the difference in blue is illustrated.

Also in this embodiment, the arrangement of the light sources 62 will be described with reference to FIGS. 12 (a) and 12 (b). In FIG. 12B, when the light source unit 63 is viewed from the side, the plurality of light sources 62 are arranged side by side in the row direction X on the flexible substrate 58. And the light source 62a with weak blueness and the light source 62b with strong blueness from which the brightness | luminances which differ in brightness | luminance are arrange | positioned alternately from the left side of a figure. Specifically, a light source 62b with a strong bluish color is provided right next to a light source 62a with a weak bluish color located on the leftmost side. A light source 62a having a weak bluish color is provided to the right of the light source 62b having a strong bluish color. In the same manner, the light sources 62a having a weak blueness and the light sources 62b having a strong blueness are alternately arranged in this order. That is, the light source 62a having a weak bluish color and the light source 62b having a strong bluish color are arranged adjacent to each other.

On the other hand, when the light source unit 63 is viewed two-dimensionally in FIG.
2a and the light source 62b having a strong blue tint, for example, in the row direction X, the light source 62a having a weak bluish color and the light source 62b having a strong blue tint are alternately arranged one by one. The arrangement is such that the two directions Y are not arranged next to each other.

In FIG. 12B, a portion (for example, a portion indicated by an arrow F1) in which the light source 62b having a strong bluish color is arranged on the right side of the light source 62a having a weak bluish color is “emitted light with a strong blue color. The light source that emits light and the light source that emits light with low bluishness are arranged next to each other ". Further, a portion where the three light sources are arranged in the order of 62b, 62a, 62b (for example, a portion indicated by an arrow F2) is “a light source that emits light with a weak bluish color is a light source that emits light with a strong bluish color”. FIG. 4 illustrates an embodiment of a configuration that is “disposed between”.

In the state where the light sources 62 are arranged as described above, the light emission range W2 in the light source 62b with strong bluishness is set wider than the light emission range W1 in the light source 62b with weak bluishness. In general, the light emitted in the wide range W2 is weaker than the light emitted in the narrow range W1, so that the light emitted from the light source 62a having a weak bluish color to the narrow range and the light source 62b having a strong blue color are used.
When the light emitted in a wide range from the light is mixed, the difference in light color between the light is reduced, and the uniformity of the color of the mixed light is improved. Therefore, the bluishness of the light emitted from the lighting device 53 of FIG. 10 can be made uniform throughout the lighting device 53. Therefore, in the liquid crystal device 51 provided with the illumination device 53, it is possible to prevent the display color of the liquid crystal panel 52 from becoming uneven.

In FIG. 12B, the light emission range W <b> 2 in the light source 62 b with a strong bluish color is widened, so that the mixed light of the light emitted from the plurality of light sources 62 can be started from a position close to the light sources 62. That is, the distance t2 from the light emitting part 30 of the light source to the position where the light emitted from the plurality of light sources 62 is mixed can be shortened. Thereby, the illuminating device 53 of FIG.
Then, since the light without unevenness in color can be emitted at a position close to the light source 62, the illumination device 5
3 can be formed thinly.

(Eighth Embodiment of Lighting Device and Liquid Crystal Device)
Next, still another embodiment of the second illumination device and the liquid crystal device according to the present invention will be described. In the present embodiment, an arrangement different from that of the previous seventh embodiment is used for the plurality of light sources 62 of FIG. FIGS. 13A and 13B show the arrangement of the light sources 62 in the light source unit 63 which is the main part of the second illumination device and the liquid crystal device according to the present embodiment.
In FIG. 13B, a plurality of light sources 62 are provided on a flexible substrate 58, and between the pair of light sources 62b and 62b having a strong bluish color among the light sources 62, two light sources 62a having a weak bluish color are present.
It is arranged one by one.

On the other hand, when the light source unit 63 is viewed in a plan view in FIG.
Regarding the arrangement of 2a and the light source 62b having a strong blue tint, for example, 2 in the row direction X
Two light sources 62a with weak blueness are arranged between two light sources 62b with strong blueness, and the light source 62a with weak blueness and the light source 62b with strong blueness are adjacent to each other as much as possible in both the row direction X and the column direction Y. The arrangement is not in line with each other.

In FIG. 13B, a portion (for example, a portion indicated by an arrow G1) where the light source 62b having a strong bluish color is arranged on the right side of the light source 62a having a weak bluish color “emits light with a strong bluish color. The light source that emits light and the light source that emits light with low bluishness are arranged next to each other ". Further, a portion where the four light sources are arranged in the order of 62b, 62a, 62a, 62b (for example, a portion indicated by an arrow G2) is “a light source that emits light with a weak bluish color emits light with a strong bluish color. FIG. 2 illustrates an embodiment of a configuration that is “placed between light sources”.

Also in the present embodiment, as in the previous sixth embodiment, the light emission range W2 in the light source 62b with a strong bluish color is set wider than the light emission range W1 in the light source 62a with a low bluish color. In general, the light emitted in the wide range W2 has a lower intensity than the light emitted in the narrow range W1, so that the light emitted in the narrow range from the light source 62a having a weak bluish color and the light source 6 having a strong blue color are used.
When light emitted in a wide range from 2b is mixed, the difference in intensity between the lights becomes small, and the uniformity of the light quantity of the mixed light is improved. Therefore, the brightness of the light emitted from the illumination device 53 in FIG. 10 can be made uniform throughout the illumination device 53. Therefore, in the liquid crystal device 51 of FIG. 10 provided with the illumination device 53, it is possible to prevent unevenness in display luminance of the liquid crystal panel 52.

In FIG. 13B, the light emission range W <b> 2 in the light source 62 b with a strong bluish color is widened, so that the mixed light of the light emitted from the plurality of light sources 62 can be started from a position close to the light sources 62. That is, the distance t3 from the light emitting unit 30 of the light source to the position where the light emitted from the plurality of light sources 62 is mixed can be shortened. Therefore, the illumination device 53 can be formed thin.

(Other embodiments of lighting device and liquid crystal device)
The present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to the embodiments, and various modifications can be made within the scope of the invention described in the claims.

For example, in each of the above-described embodiments, the liquid crystal device corresponds to the three sub-pixels D in FIG. 1, and the colored films of three colors B (blue), G (green), and R (red) (that is, Colored area) 21 was made to correspond. However, the coloring film 21 can also correspond to each of four colors corresponding to the four sub-pixels D by adding other colors to B (blue), G (green), and R (red). In this case, various combinations of the color of the colored film 21 are possible as follows. That is, one display pixel G can be formed by four subpixels D.

In this way, when one display pixel G is formed by the four colored regions, the four colored regions have a blue hue in the visible light region (380 to 780 nm) whose hue changes according to the wavelength. It consists of a colored region, a colored region of a red hue, and a colored region of two hues selected from hues from blue to yellow. Here, the wording of the system is used, but if it is a blue system, for example, it is not limited to a pure blue hue, but includes a bluish purple, a blue green, and the like. If it is a red hue, it is not limited to red but includes orange. These colored regions may be constituted by a single colored film, or may be constituted by overlapping colored films having a plurality of different hues. In addition, although these colored regions are described in terms of hue, the hue can be set by appropriately changing the saturation and lightness.

The specific hue range is as follows: (1) The colored region of the blue hue is blue-purple to blue-green, more preferably indigo to blue. (2) The colored region of red hue is from orange to red. (3) One colored region selected with a hue from blue to yellow is blue to green, more preferably blue green to green. (4) The other colored region selected with a hue from blue to yellow is green to orange, more preferably green to yellow. Or it is green to yellowish green.
Here, the same hue is not used for each colored region. For example, when a green hue is used in two colored regions selected from hues of blue to yellow, the other uses a blue or yellowish green hue for one green. As described above, a wider range of color reproducibility can be realized than when the conventional colored regions of B, G, and R are used.

As another specific example, the colored region can be defined by the wavelength of transmission. For example,
(1) The blue colored region is a colored region having a wavelength peak of light in the range of 415 to 500 nm, preferably 435 to 485 nm. (2) The red colored region is a colored region having a wavelength peak of light transmitted through the region of 600 nm or more, and preferably a colored region of 605 nm or more. (3) One colored region selected with a hue from blue to yellow is a colored region having a wavelength peak of 485 to 535 nm of light transmitted through the region, preferably a colored region having a wavelength of 495 to 520 nm. is there. (4) In the other colored region selected with a hue from blue to yellow, the wavelength peak of the light transmitted through the region is 500 to 590.
nm colored region, preferably 510-585 nm colored region, or 530-
This is a colored region at 565 nm.
In the case of transmissive display, the above wavelengths are numerical values obtained from the illumination light from the illumination device through the color filter. In the case of reflective display, the value is obtained by reflecting external light.

As another specific example, the colored region can be defined by an x, y chromaticity diagram. For example,
(1) The blue colored region is a colored region in which x ≦ 0.151 and y ≦ 0.200, and preferably 0.134 ≦ x ≦ 0.151 and 0.034 ≦ y ≦ 0.200. This is a colored region. (2) The red colored region is a colored region at 0.520 ≦ x, y ≦ 0.360,
Preferably, it is a colored region in which 0.550 ≦ x ≦ 0.690 and 0.210 ≦ y ≦ 0.360. (3) One colored region selected with a hue from blue to yellow is x ≦ 0.200, 0
. 210 ≦ y is a colored region, preferably 0.080 ≦ x ≦ 0.200, 0.2
This is a colored region where 10 ≦ y ≦ 0.759. (4) The other colored region selected with a hue from blue to yellow is a colored region having 0.257 ≦ x and 0.450 ≦ y, preferably 0.
. It is a colored region in which 257 ≦ x ≦ 0.520 and 0.450 ≦ y ≦ 0.720. This x
, Y chromaticity diagram is a numerical value obtained by illuminating light from the illumination device through the color filter in the case of transmissive display. In the case of reflective display, the value is obtained by reflecting external light.

In the liquid crystal device 1 shown in FIG. 1, the entire area of each subpixel D may be a light transmission region, or both the light transmission region and the light reflection region exist in each subpixel D. It may be. The liquid crystal device in the case where the entire area of each sub-pixel D is a light transmission region is a transmissive liquid crystal device. The liquid crystal device in the case where both the light transmission region and the light reflection region exist in each sub-pixel D is a transflective liquid crystal device. When the sub-pixel has a light transmission region and a light reflection region, the above-described four-color colored regions can be applied to the light transmission region and the light reflection region in the above-described range.

The light source 29 in FIG. 3 is configured using individual light emitting elements of B (blue), G (green), and R (red). In this case, B (blue) has a wavelength peak of emitted light of 435 to 485.
G (green) is a wavelength of emitted light having a peak at 520 to 545 nm, R
(Red) may have a peak of emitted wavelength at 610 to 650 nm. In this case, it is desirable to select each of the colored regions B, G, and R of the color filter having a spectral distribution having a peak at substantially the same wavelength portion as the light source side. Thereby, a wide range of color reproducibility can be obtained. In addition, a light source having a plurality of peaks such as wavelengths having peaks at 450 nm and 565 nm can be used.

Moreover, the following example can be considered as a structural example of the coloring area | region of 4 colors which comprises a color filter.
(1) Colored areas having hues of red, blue, green, and cyan (blue green).
(2) Colored areas with hues of red, blue, green, and yellow.
(3) Colored areas of red, blue, dark green, and yellow.
(4) A colored region having a hue of red, blue, emerald green, or yellowish green.
(5) Colored areas with hues of red, blue, emerald green, and yellow.
(6) Colored areas with hues of red, blue, dark green, and yellowish green.
(7) A colored region in which the hue is red, blue-green, dark green, or yellow-green.

Moreover, in the said embodiment, the light source 29 was formed using several LED32 in FIG. Instead of this, the light source 29 may be formed using a fluorescent tube or organic EL (Electro Luminescence).

(Embodiment of electronic device)
Next, an embodiment of an electronic device according to the present invention will be described. FIG. 14 shows a block diagram of an embodiment of an electronic device. The electronic device shown here includes a liquid crystal device 1 and a control circuit 100. The liquid crystal device 1 is a liquid crystal device having the same configuration as the liquid crystal device 1 shown in FIGS. 1 and 2, and includes a liquid crystal panel 2, a lighting device 3, and a drive circuit 101 included in a drive IC 17 (see FIG. 1). Have.

The control circuit 100 includes a display information output source 102, a display information processing circuit 103, and a power supply circuit 104.
And the timing generator 105. The display information output source 102 is an RA
A memory unit such as an R (Random Access Memory), a storage unit such as various disks, a tuning circuit that tunes and outputs a digital image signal, and the like. A predetermined format based on various clock signals generated by the timing generator 105 Display information such as an image signal is supplied to the display information processing circuit 103.

Next, the display information processing circuit 103 includes a number of well-known circuits such as an amplification / inversion circuit, a rotation circuit, a gamma correction circuit, a clamp circuit, and the like, executes processing of input display information, and outputs an image signal. It is supplied to the drive circuit 101 together with the clock signal CLK. Here, the drive circuit 101 is a generic term for an inspection circuit and the like together with a scanning line drive circuit and a data line drive circuit. The power supply circuit 104 supplies a predetermined power supply voltage to each of the above components.

FIG. 15 shows a personal computer which is another embodiment of the electronic apparatus according to the invention. The personal computer 110 includes a liquid crystal device 11 that functions as a display device.
1 and a main body 112. The main body 112 is provided with a keyboard 113.
The liquid crystal device 111 can be the liquid crystal device 1 shown in FIG. 1 or the liquid crystal device 51 shown in FIG. When a bright display is desired, it is desirable to use the flat light type, that is, the direct type liquid crystal device 51 shown in FIG. 10, rather than the side light type liquid crystal device 1 shown in FIG.

FIG. 16 shows a mobile phone which is another embodiment of the electronic apparatus according to the invention. A cellular phone 120 shown here includes a main body 122 and a display body 12 that can be opened and closed.
3. The display body 123 is provided with a liquid crystal device 121 as a display device.
The liquid crystal device 121 can be the liquid crystal device 1 shown in FIG. 1 or the liquid crystal device 51 shown in FIG. When it is desired to reduce the size of the cellular phone 120, it is desirable to use the side light type liquid crystal device 1 shown in FIG. 1 rather than the flat light type liquid crystal device 51 shown in FIG.

The main body 122 is provided with an operation button 124 and a transmitter 125. Transmitter 125
A microphone (not shown) is built in the. The antenna 1 is provided on a part of the display body 123.
26 is attached in a telescopic manner. A receiver 127 provided on the upper part of the display body 123.
A speaker (not shown) is arranged inside the. The control unit for controlling the operation of the liquid crystal device 121 is a part of the control unit that controls the entire mobile phone, or separately from the control unit.
It is stored inside the main body 122 or the display body 123.

According to the liquid crystal device 1 (see FIG. 1), the liquid crystal device 51 (see FIG. 10) and the like according to the present invention, a liquid crystal can be obtained by using the illuminating device 3 or 53 that suppresses unevenness of luminance or bluishness of emitted light. It is possible to prevent the occurrence of luminance or bluish unevenness in the display of the panel 2 or 52. Therefore, even in the electronic apparatus according to the present invention using the liquid crystal device 1 or 51, it is possible to prevent unevenness in display brightness or bluishness.

(Modification)
The present invention can be applied to other electronic devices other than the personal computer shown in FIG. 15 and the mobile phone shown in FIG. For example, the present invention includes a liquid crystal television, a viewfinder type or a monitor direct-view type video tape recorder, a car navigation device, a pager, an electronic notebook, a calculator,
The present invention can be applied to various electronic devices such as word processors, workstations, videophones, POS terminals, digital still cameras, and the like.

It is a top view of one embodiment about each of a liquid crystal device and an illuminating device concerning the present invention. It is side surface sectional drawing of the liquid crystal device and illuminating device which are shown in FIG. It is a perspective view which shows an example of the light source part used with the illuminating device of FIG. FIG. 4 shows an example of a light source used in the light source section of FIG. 3, (a) is a plan view, and (b) is a side cross-sectional view according to the Z3-Z3 line of (a). It is a circuit diagram which shows an example of the drive circuit used with the illuminating device shown in FIG. FIG. 6 is a circuit diagram showing a main part of the drive circuit shown in FIG. 5. FIG. 6 is a diagram illustrating an example of a driving pulse used in the driving circuit of FIG. 5. (A) is a top view which shows an example of the light emission range of the illuminating device of FIG. 1, (b) is a top view which shows another example of the light emission range of the illuminating device of FIG. The other example of the light source used with the light source part of FIG. 3 is shown, (a) is a top view, (b) is side sectional drawing according to Z4-Z4 of (a). It is a top view of other embodiments about each of a liquid crystal device and an illuminating device concerning the present invention. FIG. 11 is an exploded side view of the embodiment of FIG. 10. (A) is a top view which shows an example of the principal part of the illuminating device of FIG. 10, (b) is a side view of (a). (A) is a top view which shows the other example of the principal part of the illuminating device of FIG. 10, (b) is a side view of (a). It is a block diagram of one Embodiment of the electronic device which concerns on this invention. It is a perspective view of the personal computer which is other embodiment of the electronic device which concerns on this invention. It is a perspective view of the mobile telephone which is other embodiment of the electronic device which concerns on this invention.

Explanation of symbols

1,51. Liquid crystal device, 52. Liquid crystal panel, 3,53. Lighting equipment,
4). Element substrate, 4a. 4. a translucent substrate; Color filter substrate, 5a. Translucent substrate,
7). Seal material, 8. Liquid crystal layer, 9a, 9b. 10. polarizing plate; Source line,
12 A gate line, 12a. 12. Lead wiring, TFT element, 14. Pixel electrodes,
15. Overhang part, 16. 16. External connection terminal Driving IC, 18. FPC board,
21. Colored film, 22. Overcoat film, 23. Common electrode, 24. wiring,
26. Light guide 27,57. Light source part 28,58. Flexible substrates,
29, 39, 62. Light source, 29a, 62a. Low-intensity light source (light source with weak blueness),
29b, 62b. High brightness light source (light source with strong bluishness), 31. Insulator,
31a. Light reflecting surface, 31b. Bottom, 32R. Red LED (light emitter),
32G. Green LED (light emitter), 32B. Blue LED (light emitter),
33, 34. Electrodes, 36. Anode, 37a, 37b. Wire, 38. Cathode,
40. YAG phosphor, 41. Transparent resin, 42. Lens, 44. Drive circuit,
50. Pulse voltage generation circuit, 54. Light reflector, 55. Light scattering plate,
56a. First light collector 56b. Second light collector, 59. Housing, 62. light source,
63. Light source unit, 100. Control circuit, 101. Drive circuit,
110. Personal computer (electronic device), 111. Liquid crystal device,
120. Mobile phone (electronic device), 121. Liquid crystal device; Sub-pixel,
F. Frame region, G. Display pixels, R0. Current limiting resistor; Indicated Area

Claims (16)

Having a plurality of light sources that emit light of the same color and different brightness,
An illumination device characterized in that a light emission range of a light source that emits light with high luminance among the plurality of light sources of the same color is wider than a light emission range of a light source that emits light with low luminance. The lighting device according to claim 1, wherein the light source that emits light having high luminance and the light source that emits light having low luminance are arranged adjacent to each other. The lighting device according to claim 1, wherein the light source that emits light having low luminance is disposed between the light sources that emit light having high luminance. The lighting device according to any one of claims 1 to 3, wherein each of the light sources is
A light emitting body that emits monochromatic light; and a light reflecting surface that reflects light emitted from the light emitting body in a predetermined direction. The angle of the light reflecting surface with respect to the light emitting body emits light with high luminance. The illumination device is different between a light source that emits light and a light source that emits light having low luminance. 5. The illumination device according to claim 1, wherein a lens is provided in a light emitting portion of each of the light sources, and a refractive index of the lens is a light source that emits light having high luminance. And a light source that emits light with low luminance. Having a plurality of light sources that emit light of the same color and different bluishness,
A light emitting range of a light source that emits light with a strong bluish light among the plurality of light sources of the same color is wider than a light emitting range of a light source that emits light with a low bluish color . The lighting device according to claim 6, wherein the light source that emits light with a strong bluish color and the light source that emits light with a low bluish color are arranged adjacent to each other. The lighting device according to claim 6, wherein the light source that emits light having a weak bluish color is disposed between the light sources that emit light having a strong bluish color. The lighting device according to any one of claims 6 to 8, wherein each of the light sources is
A light emitting body that emits monochromatic light; and a light reflecting surface that reflects light emitted from the light emitting body in a predetermined direction. The angle of the light reflecting surface with respect to the light emitting body is such that the bluish light is strong. An illumination device, wherein the light source is different from the light source that emits light having a weak blue tint. 10. The illumination device according to claim 6, wherein a lens is provided in a light emitting portion of each of the light sources, and the refractive index of the lens emits light having a strong blue tint. A lighting device, wherein a light source and a light source that emits light having a weak blue tint are different. The lighting device according to any one of claims 1 to 10, wherein the light source is a white light source having a blue light emitter and a phosphor covering the blue light emitter. Lighting device. 11. The lighting device according to claim 1, wherein the light source includes a light emitter that emits blue light, a light emitter that emits green light, and a light emitter that emits each color of red. 11. A lighting device comprising a white light source having a body. The lighting device according to any one of claims 1 to 12, further comprising a light guide that emits light introduced from a light incident surface on a side surface from the light emitting surface, wherein the plurality of light sources The light emitting portion is disposed so as to face the light incident surface of the light guide. The illuminating device according to any one of claims 1 to 13, wherein the plurality of light sources are opposed to an object to be illuminated and arranged in a plane. A liquid crystal panel for displaying images;
An illuminating device provided facing the surface opposite to the side on which the image of the liquid crystal panel is viewed;
15. The liquid crystal device according to claim 1, wherein the lighting device is the lighting device according to any one of claims 1 to 14. An electronic apparatus comprising the liquid crystal device according to claim 15.

Images