WO2011013419A1 - バックライト装置、表示装置およびテレビジョン受像機 - Google Patents
バックライト装置、表示装置およびテレビジョン受像機 Download PDFInfo
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- WO2011013419A1 WO2011013419A1 PCT/JP2010/057220 JP2010057220W WO2011013419A1 WO 2011013419 A1 WO2011013419 A1 WO 2011013419A1 JP 2010057220 W JP2010057220 W JP 2010057220W WO 2011013419 A1 WO2011013419 A1 WO 2011013419A1
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- WIPO (PCT)
- Prior art keywords
- point light
- connector
- light source
- backlight device
- substrate
- Prior art date
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133612—Electrical details
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133613—Direct backlight characterized by the sequence of light sources
Definitions
- the present invention relates to a backlight device, a display device, and a television receiver, and more particularly to a backlight device, a display device, and a television receiver that include a substrate on which a point light source is mounted and a connector provided on the substrate. .
- a backlight device including a substrate on which a point light source is mounted and a connector provided on the substrate is known as a backlight device that irradiates light onto a display panel.
- This conventional backlight device includes a plurality of substrates on which a plurality of LEDs (light emitting diodes (point light sources)) are mounted, a connector disposed on the substrate and electrically connecting the substrates, and a predetermined region on the substrate.
- a reflection member such as a reflection sheet is provided, and an optical sheet such as a diffusion sheet is provided on the light emission side of the LED.
- the reflective member has a plurality of openings, and the LEDs and the connectors are electrically connected to the substrate through the openings.
- the reflectance of the light on the surface of the connector is usually lower than the reflectance of the light on the surface of the reflecting member, light loss occurs on the surface of the connector. That is, of the light emitted from the LED and reflected by the optical sheet, the light reflected by the surface of the connector is converted into the light reflected by the surface of the reflecting member among the light emitted from the LED and reflected by the optical sheet. Compared to less. For this reason, when viewed from the display panel side, the luminance of the portion on the connector is lower than the luminance of the portion other than on the connector. As a result, there is a disadvantage that the luminance of the display panel becomes non-uniform.
- Patent Document 1 a plurality of wiring boards on which a plurality of LEDs (point light sources) are mounted, a connector that is arranged on the wiring board and that inputs or outputs a signal for turning on the LEDs, and a wiring board are provided.
- a backlight device is disclosed that includes a reflector (reflecting member) that is disposed and a diffuser that is disposed on the light emission side of the LED.
- Patent Document 1 an opening for electrically connecting an LED to a wiring board is formed in the reflection plate, and a structure in which a reflection sheet is separately provided so as to cover the connector, or a cut is made in the reflection plate.
- a structure in which a flap portion is provided and the flap portion is arranged so as to cover the connector has been proposed.
- a light loss is generated on the surface of the connector by separately providing a reflective sheet so as to cover the connector or by arranging a flap portion of the reflector so as to cover the connector. Can be suppressed.
- the flap portion of the reflector is arranged so as to cover the connector, it is necessary to bend the base portion of the flap portion, so that stress is applied to the bent portion (base portion) of the flap portion. For this reason, when the backlight device is used for a long period of time, the bent portion of the flap portion may be bent or warped due to the temperature environment or the humidity environment. In this case, since the surface of the connector is exposed, there is a problem that light loss occurs on the surface of the connector and the luminance of the display panel becomes non-uniform.
- the present invention has been made in order to solve the above-described problems, and an object of the present invention is to suppress an increase in the number of manufacturing steps and to suppress a non-uniform luminance of the display panel.
- the present invention provides a backlight device, a display device, and a television receiver that can be used.
- a backlight device is arranged on a plurality of point light sources, a substrate having one surface on which a plurality of point light sources are mounted, and one surface of the substrate.
- the light flux emitted from the point light source around the connector is larger than the light flux outside the connector around the light emitted from the point light source.
- the backlight device in the backlight device according to the first aspect, as described above, even if a loss of light occurs on the surface of the connector by increasing the luminous flux around the connector as compared with the luminous flux outside the circumference of the connector, The light loss generated on the surface of the connector can be compensated by the light flux around the connector. As a result, when viewed from the display panel side, it is possible to prevent the luminance of the portion on the connector from becoming lower than the luminance of the portion other than the portion on the connector. Can be suppressed.
- the backlight device as described above, it is not necessary to separately provide a reflective sheet so as to cover the connector in order to prevent the luminance of the display panel from becoming uneven. An increase in the number of steps can be suppressed.
- a flap portion is provided on the reflection member, and the flap portion covers the connector. There is no need to arrange so. Accordingly, even when the backlight device is used for a long period of time, the reflecting member can be prevented from being bent or warped, so that the luminance of the display panel can be prevented from becoming uneven.
- the plurality of point light sources are disposed so as to be adjacent to the connector, and at a position farther from the connector than the first point light source.
- the light flux emitted from the first point light source is larger than the light flux emitted from the second point light source.
- the current flowing through the first point light source is preferably larger than the current flowing through the second point light source. If comprised in this way, the light beam radiate
- the light emission efficiency of the first point light source is preferably higher than the light emission efficiency of the second point light source. If comprised in this way, the light beam radiate
- the arrangement density of the point light sources around the connector is higher than the arrangement density of the point light sources outside the circumference of the connector.
- the plurality of point light sources are arranged to be adjacent to the connector.
- the substrate includes a plurality of substrates, and the distance between the first point light sources of adjacent substrates is 1 It is smaller than the distance between the first point light source and the second point light source on the two substrates.
- the arrangement density of the point light source in the periphery of a connector can be easily made higher than the arrangement density of the point light sources other than the periphery of a connector, the brightness
- a reflective member is provided in a predetermined region on one surface of the substrate. If comprised in this way, the utilization efficiency of light can be improved easily.
- a plurality of point light sources may be arranged along the longitudinal direction of the substrate.
- the point light sources are preferably arranged on one substrate at an equal pitch in the longitudinal direction of the substrate. If comprised in this way, it can suppress more that the brightness
- a connector may be provided at an end portion in the longitudinal direction of the substrate, and a plurality of substrates may be arranged along the longitudinal direction.
- the substrate includes a plurality of substrates, and the connector electrically connects adjacent substrates. If comprised in this way, a some board
- substrate can be electrically connected in series or parallel easily.
- the point light source is a light emitting diode. If comprised in this way, while the lifetime of a point light source can be lengthened, the power consumption of a point light source can be reduced.
- a plurality of diffusion lenses are provided to cover the plurality of point light sources, respectively. If comprised in this way, since the light radiate
- a display device includes the backlight device configured as described above and a display panel illuminated by the backlight device. If comprised in this way, while suppressing an increase in a manufacturing process, the display apparatus which can suppress that the brightness
- the display panel preferably includes a liquid crystal display panel. If comprised in this way, while suppressing the increase in a manufacturing process, the liquid crystal display device which can suppress that the brightness
- a television receiver includes the display device having the above-described configuration, a cabinet that houses the display device, a tuner, and a speaker. If comprised in this way, while suppressing an increase in a manufacturing process, the television receiver which can suppress that the brightness
- the backlight device, the display device, and the television receiver capable of suppressing an increase in the number of manufacturing steps and suppressing the luminance of the display panel from becoming uneven. Can be easily obtained.
- FIG. 2 is an exploded perspective view illustrating a structure of a liquid crystal display device including the backlight device according to the first embodiment of the present invention illustrated in FIG. 1.
- FIG. 2 is a cross-sectional view illustrating a structure around a substrate of the backlight device according to the first embodiment of the present invention illustrated in FIG. 1. It is sectional drawing which showed the structure of Example 1 corresponding to 1st Embodiment of this invention. It is the figure which showed the luminance characteristic of the A direction of the light which permeate
- FIG. 6 is a cross-sectional view illustrating a structure around a substrate of a backlight device according to a second embodiment of the present invention. It is sectional drawing which showed the structure of Example 3 corresponding to 2nd Embodiment of this invention.
- the liquid crystal television receiver 1 is an example of the “television receiver” in the present invention.
- a liquid crystal television receiver 1 including a backlight device 20 includes a liquid crystal display device 10 including the backlight device 20 and a front that houses the liquid crystal display device 10.
- a cabinet 2 and a back cabinet 3, a speaker 4 attached to the front cabinet 2, a tuner 5, a power source 6, and a support member 7 are provided. Since the front cabinet 2, the back cabinet 3, the speaker 4, the tuner 5, the power source 6, and the support member 7 that are conventionally used can be applied, each will be briefly described.
- the liquid crystal display device 10 is an example of the “display device” in the present invention, and the front cabinet 2 and the back cabinet 3 are examples of the “cabinet” in the present invention.
- the front cabinet 2 and the back cabinet 3 house a liquid crystal display device 10, a tuner 5 and a power source 6.
- the tuner 5 has a function of generating an image signal and an audio signal of a predetermined channel from the received radio wave.
- the speaker 4 has a function of emitting sound based on the sound signal generated by the tuner 5.
- the power source 6 is configured to supply power to the liquid crystal display device 10, the speaker 4, and the tuner 5.
- the liquid crystal display device 10 is supported by the support member 7.
- the speaker 4, the tuner 5, and the power source 6 may be assembled in the liquid crystal display device 10.
- the liquid crystal display device 10 includes a frame-shaped bezel 11, a liquid crystal display panel 12 having a peripheral edge covered with the bezel 11, and a backlight device 20 disposed on the back side of the liquid crystal display panel 12. And is composed of.
- the liquid crystal display panel 12 is an example of the “display panel” in the present invention.
- the liquid crystal display panel 12 includes an AM substrate (active matrix substrate) 12a and a counter substrate 12b disposed to face the AM substrate 12a.
- a liquid crystal (not shown) is sealed between the AM substrate 12a and the counter substrate 12b.
- the liquid crystal display panel 12 functions as a display panel when illuminated by the backlight device 20.
- the backlight device 20 includes a plurality of substrates 22 on which a plurality of LEDs 21 are mounted, a connector 23 that connects the adjacent substrates 22 in series, for example, a reflection sheet 24 that is disposed on the front surface 22a side of the substrate 22, and a reflection A diffusion plate 25 and a plurality of optical sheets 26 disposed on the front surface side of the sheet 24, and a front chassis 27 and a back chassis 28 that store these are included.
- the LED 21 is an example of the “point light source” and “light-emitting diode” in the present invention
- the front surface 22a is an example of the “one surface” in the present invention.
- the reflection sheet 24 is an example of the “reflection member” in the present invention.
- the substrate 22 is formed in a rectangular shape in plan view. For example, three substrates 22 are arranged along the longitudinal direction of the substrate 22, and five substrates are arranged along the short direction of the substrate 22.
- the longitudinal direction of the substrate 22 is referred to as the A direction
- the short direction of the substrate 22 is referred to as the B direction.
- a plurality of LEDs 21 and connectors 23 are mounted on the front surface 22 a of the substrate 22.
- the connector 23 is attached to an end portion of the substrate 22 in the A direction, which is opposed to the substrate 22 adjacent in the A direction.
- a pair of adjacent connectors 23 are connected to each other and physically and electrically connect adjacent boards 22 to each other.
- the light reflectance on the surface of the connector 23 is lower than the light reflectance on the surface of the reflection sheet 24 (see FIG. 2).
- the substrate 22 is configured to be supplied with a current (power) for causing the LED 21 to emit light.
- each LED 21 is mounted on the front surface 22a of each substrate 22 along the A direction. Moreover, LED21 is formed so that light may be radiate
- the diffusion lens 29 is made of, for example, a transparent resin.
- three LEDs 21 mounted on one substrate 22 are arranged at a constant pitch (P1). That is, the three LEDs 21 are arranged on the single substrate 22 at an equal pitch in the A direction.
- the plurality of LEDs 21 include an LED 21a disposed so as to be adjacent to the connector 23, and an LED 21b disposed at a position farther from the connector 23 than the LED 21a.
- the distance between the LEDs 21a on the adjacent substrates 22 is equal to the distance between the LEDs 21a and the LEDs 21b on one substrate 22. That is, all the LEDs 21 mounted on the three substrates 22 arranged along the A direction are arranged at an equal pitch (P1).
- the LED 21a is an example of the “first point light source” in the present invention
- the LED 21b is an example of the “second point light source” in the present invention.
- LED21 is comprised by the fluorescent substance which converts a part of blue light radiate
- the LED 21 includes, for example, a blue light emitting element and a phosphor that converts part of the blue light emitted from the blue light emitting element into red light and green light, and the blue light, red light, and green light are mixed. In this case, white light may be obtained.
- the LED 21 includes, for example, a blue light emitting element, a phosphor that is disposed on the blue light emitting element and converts part of the blue light into green light, and a red light emitting element, and includes blue light, green light, and red light. You may comprise so that white light may be obtained by mixing light.
- the LED 21 may be constituted by, for example, an ultraviolet light emitting element and a phosphor that converts ultraviolet light into blue light, green light, and red light.
- the light beam LA emitted from the LED 21a arranged adjacent to the connector 23 is compared with the light beam LB emitted from the LED 21b arranged farther from the connector 23 than the LED 21a. Big.
- the luminous flux LA emitted from the LED 21a can be easily increased as compared with the luminous flux LB emitted from the LED 21b.
- the LED 21a disposed adjacent to the connector 23 is an LED 21 having higher luminous efficiency than the LED 21b
- the light flux LA emitted from the LED 21a can be easily compared with the light flux LB emitted from the LED 21b. Can be made larger. In this case, it is possible to equalize the currents that flow through the LEDs 21a and 21b, so that it is possible to prevent the circuit configuration from becoming complicated.
- LED21 which has luminous efficiency higher than LED21b as LED21a, and may make the electric current which flows into LED21a larger than the electric current which flows through LED21b.
- the reflection sheet 24 is arranged in a predetermined area on the front surface 22a of the substrate 22 as shown in FIGS.
- the reflection sheet 24 is formed of, for example, white resin, and has a function of reflecting light emitted from the LED 21 and reflected by the diffusion plate 25 or the like to the front (the diffusion plate 25 side).
- the reflection sheet 24 is formed with a plurality of openings 24a into which the LEDs 21 and the diffusion lens 29 are inserted, and a plurality of openings 24b into which the connector 23 is inserted.
- the opening 24 a is formed to have an inner diameter that is slightly larger than the outer diameter of the diffusing lens 29.
- the opening 24b is formed to have an opening that is slightly larger than the outer shape of the pair of adjacent connectors 23.
- the diffusion plate 25 has a function of reflecting a part of the light emitted from the LED 21 to the reflection sheet 24 side and transmitting the remaining light emitted from the LED 21 to the liquid crystal display panel 12 side (optical sheet 26 side).
- the plurality of optical sheets 26 are composed of prism sheets, lens sheets, and the like, and have a function of condensing light transmitted through the diffusion plate 25 at a predetermined viewing angle.
- the front chassis 27 and the back chassis 28 are made of resin.
- the front chassis 27 and the back chassis 28 may be made of metal.
- the luminous flux LA emitted from the LED 21a is made larger than the luminous flux LB emitted from the LED 21b, whereby the luminous flux around the connector 23 is changed to the luminous flux other than the circumference of the connector 23.
- the reflectance of light on the surface of the connector 23 is lower than the reflectance of light on the surface of the reflection sheet 24, light loss occurs on the surface of the connector 23.
- the light flux around the connector 23 can be made larger than the light flux outside the periphery of the connector 23, even if light loss occurs on the surface of the connector 23, Light loss generated on the surface of the connector 23 can be compensated by the peripheral light flux. As a result, it is possible to suppress the luminance of the portion on the connector 23 from being lower than the luminance of the portion other than the portion on the connector 23 when viewed from the liquid crystal display panel 12 side. It is possible to suppress non-uniformity.
- the flap part covers the connector 23 top. There is no need to arrange so. Thereby, even if the backlight device 20 is used for a long period of time, it is possible to suppress the reflection sheet 24 from being bent or warped, so that the luminance of the liquid crystal display panel 12 can be suppressed from becoming uneven. it can.
- the light flux LA emitted from the LED 21a can be easily compared with the light flux LB emitted from the LED 21b. Can be large.
- the light emission efficiency of the LED 21a is higher than the light emission efficiency of the LED 21b, the light flux LA emitted from the LED 21a can be easily compared with the light flux LB emitted from the LED 21b. Can be large.
- the LEDs 21 are arranged on the single substrate 22 at an equal pitch in the A direction, thereby further suppressing the luminance of the liquid crystal display panel 12 from becoming uneven. be able to.
- the light emitted from the LEDs 21 can be diffused, so that the luminance of the liquid crystal display panel 12 is increased. It is possible to further suppress the non-uniformity.
- Example 1 corresponding to the first embodiment and Comparative Examples 1 and 2 were used. And about the Example 1 corresponding to 1st Embodiment, and the comparative example 1, the luminance characteristic of the A direction of the light which permeate
- Comparative Example 1 the luminous flux LA emitted from the LED 21a arranged so as to be adjacent to the connector 23 is made equal to the luminous flux LB emitted from the LED 21b arranged at a position farther from the connector 23 than the LED 21a. .
- the remaining structure of Comparative Example 1 was the same as that of Example 1.
- Example 1 Comparative Example 1
- transmitted the diffuser plate 25 and the liquid crystal display panel 12 was calculated
- the first embodiment it is possible to suppress a decrease in luminance on the connector 23 and to make the luminance of the liquid crystal display panel 12 nonuniform as compared with the first comparative example. It has been found that this can be suppressed. In the first embodiment, this is because the light beam LA emitted from the LED 21a is made larger than the light beam LB emitted from the LED 21b, so that the light generated on the surface of the connector 23 by the light beam LA emitted from the LED 21a. This is probably because the loss was compensated.
- Example 2 three substrates 22 were connected along the A direction.
- the other structure of Example 2 was the same as that of Example 1.
- Comparative Example 2 the light beam LA emitted from the LED 21a and the light beam LB emitted from the LED 21b were made equal.
- the remaining structure of Comparative Example 2 was the same as that of Example 2.
- Example 2 and Comparative Example 2 the in-plane luminance characteristics of the light transmitted through the diffusion plate 25 and the liquid crystal display panel 12 were obtained by simulation. The results are shown in FIGS. 7 and 8, respectively. 7 and 8 are image data obtained by photographing the liquid crystal display panel 12, and a portion with high luminance is shown in white compared with a portion with low luminance.
- a plurality of LEDs 121 and a connector 23 are mounted on the front surface 122a of the substrate 122, as shown in FIG.
- the front surface 122a is an example of “one surface” in the present invention
- the LED 121 is an example of “point light source” and “light emitting diode” in the present invention.
- three LEDs 121 mounted on one substrate 122 are arranged at a constant pitch (P11). That is, the three LEDs 121 are arranged on the single substrate 122 at an equal pitch in the A direction.
- positioned so that it may adjoin to the connector 23 among several LED121 is LED121b arrange
- the LED 121a is an example of the “first point light source” in the present invention
- the LED 121b is an example of the “second point light source” in the present invention.
- the light beam emitted from the LED 121a is equal to the light beam emitted from the LED 121b.
- the remaining structure of the second embodiment is the same as that of the first embodiment.
- the arrangement density of the LEDs 121 around the connector 23 is made higher than the arrangement density of the LEDs 121 outside the circumference of the connector 23, so that the light flux around the connector 23 It can be easily increased compared to the light flux outside the periphery.
- the luminance on the portion on the connector 23 is lower than the luminance on the portion other than the portion on the connector 23 when viewed from the liquid crystal display panel 12 side. Since it can suppress easily, it can suppress easily that the brightness
- the arrangement density of the LEDs 121 around the connector 23 is reduced by making the distance between the LEDs 121a of the adjacent substrates 122 smaller than the distance between the LEDs 121a and 121b. Can be easily made higher than the arrangement density of the LEDs 121 outside the periphery of the connector 23. Thereby, it can suppress more easily that the brightness
- Example 3 corresponding to 2nd Embodiment the luminance characteristic of the A direction of the light which permeate
- Example 3 as shown in FIG. 10, two substrates 122 were connected along the A direction.
- two LEDs 121 are mounted on the substrate 122.
- the pitch (P22) between the LEDs 121a was made smaller than the pitch (P21) between the LEDs 121a and the LEDs 121b.
- the luminous flux emitted from the LED 121a and the luminous flux emitted from the LED 121b were made equal.
- the diffusion lens 29 was not provided on the LED 121.
- Example 3 the brightness
- Example 3 it was found that the luminance on the connector 23 can be suppressed from decreasing and the luminance of the liquid crystal display panel 12 can be suppressed from becoming uneven. .
- the arrangement density of the LEDs 121 around the connector 23 is made higher than the arrangement density of the LEDs 121 outside the periphery of the connector 23, so that the luminous flux around the connector 23 is compared with the luminous flux outside the circumference of the connector 23. This is because the loss of light generated on the surface of the connector 23 can be compensated.
- Example 4 three substrates 122 were connected along the A direction.
- the other structure of Example 4 was the same as that of Example 3.
- Example 4 it was found that the luminance on the connector 23 can be suppressed as compared with Comparative Example 2 as in Example 2. Specifically, in Example 4, no dark line was seen in a portion located on the connector 23 of the liquid crystal display panel 12.
- the fourth embodiment similarly to the third embodiment, by setting the arrangement density of the LEDs 121 around the connector 23 to be higher than the arrangement density of the LEDs 121 other than the circumference of the connector 23, the luminous flux around the connector 23 is changed. It can be considered that the loss of light generated on the surface of the connector 23 can be compensated because it can be made larger than the light flux outside the periphery of the connector 23.
- the display panel, the display device, and the television receiver are applied to a liquid crystal display panel, a liquid crystal display device, and a liquid crystal television receiver.
- the present invention is not limited thereto.
- the present invention may be applied to display panels, display devices, and television receivers other than liquid crystal display panels, liquid crystal display devices, and liquid crystal television receivers.
- an LED is used as a point light source.
- the present invention is not limited to this, and a point light source other than an LED, such as a semiconductor laser element, may be used.
- the LED is configured to emit white light.
- the present invention is not limited thereto, and the LED may be configured to emit light other than white light. Good.
- an LED configured by a light emitting element and a phosphor
- the present invention is not limited thereto, and the LED is not used, for example, a blue light emitting element, a red light emitting element. You may comprise by an element and a green light emitting element.
- LEDs are mounted in a row on each substrate.
- the present invention is not limited to this, and LEDs may be mounted in a plurality of rows on each substrate.
- the present invention has been described with respect to an example in which a diffusion lens is provided so as to cover the LED.
- the present invention is not limited to this, and a diffusion lens that covers the LED may not be provided.
- emitted from LED21a is enlarged compared with the light beam radiate
- the arrangement density of LED in the periphery of a connector is other than the periphery of a connector.
- the present invention is not limited to this, and the light beam emitted from the LED 21a is made larger than the light beam emitted from the LED 21b, and the LED around the connector is used.
- the arrangement density of the LED may be higher than the arrangement density of the LEDs other than the periphery of the connector.
- the distance between the LEDs 121a of the adjacent substrates 122 is made smaller than the distance between the LEDs 121a and 121b, so that the arrangement density of the LEDs 121 around the connector 23 is reduced.
- the present invention is not limited to this, and the present invention is not limited to this, and at least a large number of LEDs 121a are provided so that the number of LEDs 121a in the B direction is larger than the number of LEDs 121b in the B direction.
- the arrangement density of the LEDs 121 around the connector 23 may be made higher than the arrangement density of the LEDs 121 outside the periphery of the connector 23 by arranging them in a row.
- LCD television receiver (television receiver) 2 Front cabinet (cabinet) 3 Back cabinet (cabinet) 4 Speaker 5 Tuner 10 Liquid crystal display device (display device) 12 Liquid crystal display panel (display panel) 20 Backlight device 21, 121 LED (point light source, light emitting diode) 21a, 121a LED (first point light source) 21b, 121b LED (second point light source) 22, 122 Substrate 22a, 122a Front (one side) 23 Connector 24 Reflective sheet (reflective member) 29 Diffuse lens
Abstract
Description
まず、図1~図3を参照して、本発明の第1実施形態によるバックライト装置20を備えた液晶テレビジョン受像機1の構造について説明する。なお、液晶テレビジョン受像機1は、本発明の「テレビジョン受像機」の一例である。
この第2実施形態では、図9を参照して、上記第1実施形態と異なり、コネクタ23の周辺のLED121の配置密度を高くする場合について説明する。
2 フロントキャビネット(キャビネット)
3 バックキャビネット(キャビネット)
4 スピーカ
5 チューナ
10 液晶表示装置(表示装置)
12 液晶表示パネル(表示パネル)
20 バックライト装置
21、121 LED(点光源、発光ダイオード)
21a、121a LED(第1点光源)
21b、121b LED(第2点光源)
22、122 基板
22a、122a 前面(一方面)
23 コネクタ
24 反射シート(反射部材)
29 拡散レンズ
Claims (16)
- 複数の点光源と、
前記点光源が複数搭載される一方面を有する基板と、
前記基板の一方面上に配置されるコネクタとを備え、
前記点光源から出射される光の前記コネクタの周辺における光束は、前記点光源から出射される光の前記コネクタの周辺以外における光束に比べて大きいことを特徴とするバックライト装置。 - 前記複数の点光源は、前記コネクタに隣接するように配置される第1点光源と、前記第1点光源に比べて前記コネクタから離れた位置に配置される第2点光源とを含み、
前記第1点光源から出射される光束は、前記第2点光源から出射される光束に比べて大きいことを特徴とする請求項1に記載のバックライト装置。 - 前記第1点光源に流れる電流は、前記第2点光源に流れる電流よりも大きいことを特徴とする請求項2に記載のバックライト装置。
- 前記第1点光源の発光効率は、前記第2点光源の発光効率よりも高いことを特徴とする請求項2または3に記載のバックライト装置。
- 前記コネクタの周辺における前記点光源の配置密度は、前記コネクタの周辺以外における前記点光源の配置密度よりも高いことを特徴とする請求項1~4のいずれか1項に記載のバックライト装置。
- 前記複数の点光源は、前記コネクタに隣接するように配置される第1点光源と、前記第1点光源に比べて前記コネクタから離れた位置に配置される第2点光源とを含み、
前記基板は、複数からなり、
隣接する前記基板の第1点光源同士の間の距離は、1つの前記基板上における前記第1点光源と前記第2点光源との間の距離よりも小さいことを特徴とする請求項5に記載のバックライト装置。 - 前記基板の一方面上の所定領域には、反射部材が設けられていることを特徴とする請求項1~6のいずれか1項に記載のバックライト装置。
- 前記複数の点光源は、前記基板の長手方向に沿って配置されていることを特徴とする請求項1~7のいずれか1項に記載のバックライト装置。
- 前記点光源は、1つの前記基板上において、前記基板の長手方向に等ピッチで配置されていることを特徴とする請求項8に記載のバックライト装置。
- 前記コネクタは、前記基板の長手方向の端部に設けられており、
前記基板は、前記長手方向に沿って複数配置されていることを特徴とする請求項8または9に記載のバックライト装置。 - 前記基板は、複数からなり、
前記コネクタは、隣接する前記基板同士を電気的に接続することを特徴とする請求項1~10のいずれか1項に記載のバックライト装置。 - 前記点光源は、発光ダイオードであることを特徴とする請求項1~11のいずれか1項に記載のバックライト装置。
- 前記複数の点光源上をそれぞれ覆う複数の拡散レンズが設けられていることを特徴とする請求項1~12のいずれか1項に記載のバックライト装置。
- 請求項1~13のいずれか1項に記載のバックライト装置と、
前記バックライト装置により照明される表示パネルとを備えることを特徴とする表示装置。 - 前記表示パネルは、液晶表示パネルを含むことを特徴とする請求項14に記載の表示装置。
- 請求項14または15に記載の表示装置と、
前記表示装置を収納するキャビネットと、
チューナと、
スピーカとを備えることを特徴とするテレビジョン受像機。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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EP10804167.4A EP2461084B1 (en) | 2009-07-31 | 2010-04-23 | Backlight device, display device, and television receiver |
RU2012107326/07A RU2507441C2 (ru) | 2009-07-31 | 2010-04-23 | Устройство задней подсветки, устройство отображения и телевизионный приемник |
CN2010800322236A CN102472449B (zh) | 2009-07-31 | 2010-04-23 | 背光源装置、显示装置以及电视接收机 |
BR112012008049A BR112012008049A2 (pt) | 2009-07-31 | 2010-04-23 | dispositivo de retroiluminação, dispositivo de exibição e receptor de televisão |
US13/384,788 US20120224107A1 (en) | 2009-07-31 | 2010-04-23 | Backlight device, display device and television receiver |
JP2011524689A JP5228110B2 (ja) | 2009-07-31 | 2010-04-23 | バックライト装置、表示装置およびテレビジョン受像機 |
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US (1) | US20120224107A1 (ja) |
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WO2012029600A1 (ja) * | 2010-08-31 | 2012-03-08 | シャープ株式会社 | 照明装置、表示装置及びテレビ受信装置 |
CN103775864A (zh) * | 2012-10-23 | 2014-05-07 | 林万炯 | 一种灯具 |
KR20180051976A (ko) * | 2016-11-09 | 2018-05-17 | 엘지전자 주식회사 | 디스플레이 장치 |
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RU2507441C2 (ru) | 2014-02-20 |
CN102472449A (zh) | 2012-05-23 |
US20120224107A1 (en) | 2012-09-06 |
EP2461084B1 (en) | 2014-03-26 |
BR112012008049A2 (pt) | 2016-03-01 |
EP2461084A1 (en) | 2012-06-06 |
EP2461084A4 (en) | 2013-03-27 |
CN102472449B (zh) | 2013-12-04 |
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JPWO2011013419A1 (ja) | 2013-01-07 |
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