WO2007063846A1 - Clip de lampe, dispositif a source lumineuse et dispositif d’affichage a cristaux liquides - Google Patents

Clip de lampe, dispositif a source lumineuse et dispositif d’affichage a cristaux liquides Download PDF

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Publication number
WO2007063846A1
WO2007063846A1 PCT/JP2006/323711 JP2006323711W WO2007063846A1 WO 2007063846 A1 WO2007063846 A1 WO 2007063846A1 JP 2006323711 W JP2006323711 W JP 2006323711W WO 2007063846 A1 WO2007063846 A1 WO 2007063846A1
Authority
WO
WIPO (PCT)
Prior art keywords
lamp
light
protrusion
lamp clip
led
Prior art date
Application number
PCT/JP2006/323711
Other languages
English (en)
Japanese (ja)
Inventor
Kohhei Nanbu
Mitsuhiro Moriyasu
Toru Namiki
Original Assignee
Sharp Kabushiki Kaisha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sharp Kabushiki Kaisha filed Critical Sharp Kabushiki Kaisha
Publication of WO2007063846A1 publication Critical patent/WO2007063846A1/fr

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Classifications

    • 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
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/0075—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources
    • F21V19/008—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources of straight tubular light sources, e.g. straight fluorescent tubes, soffit lamps
    • F21V19/009—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources of straight tubular light sources, e.g. straight fluorescent tubes, soffit lamps the support means engaging the vessel of the source

Definitions

  • Lamp clip light source device and liquid crystal display device
  • the present invention relates to a lamp clip that includes an attachment portion that is attached to a support that supports a lamp, a lamp holding portion that holds the lamp, a light source device that includes the lamp clip, and a liquid crystal that includes the light source device.
  • the present invention relates to a display device.
  • a light source device for a liquid crystal display device a light source device including a lamp such as a CCFL (cold cathode fluorescent lamp) and an LED (Light Emitting Diode) is used.
  • the light source device uses a lamp clip to support the lamp on the upper side of the reflection sheet (see, for example, Patent Document 1).
  • FIG. 10 is a cross-sectional view showing a simplified configuration example of the light source device.
  • the lamp clip 100 is used to fix the reflective sheet 30b in the box-shaped chassis 36c so as to sandwich the LED board 35a on which a plurality of LEDs 33 are mounted.
  • a plurality of lamps 34 such as CCFLs are supported on the upper side of 30b.
  • the lamp clip 100 also includes an upper protrusion 200 protruding upward from the reflection sheet 30b.
  • An optical sheet 38 such as a diffusion sheet is disposed above the upper protrusion 200, and a liquid crystal panel 40 is disposed above it.
  • the lamp clip 100 is white like the reflecting surface (the surface of the reflecting sheet 30b) and reflects light.
  • the LED 33 mounted on the LED board 35a is driven by the drive circuit of the LED drive board 44b disposed outside the chassis 36c.
  • a color sensor such as a photodiode 42 is mounted on the LED substrate 35a, and the photodiode 42 is connected to the LED drive substrate 44b! Color information is sent from the photodiode 42 to the LED drive board 44b. Based on this color information, the LED drive board 44b drives the LED 33, so that the color of light radiated on the liquid crystal panel 40 is changed to the target color. Can be adjusted.
  • a light source device is disposed on the rear side of a display unit having an image display surface for displaying an image on the front side.
  • the light source device includes a lamp that emits a plurality of emission colors, a chassis that has a through-hole in a rear wall and that accommodates the lamp, and a through-hole.
  • a lamp clip that has a mounting protrusion that is inserted and locked to hold the lamp (for example, see Patent Document 2).
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2004-318176
  • Patent Document 2 Japanese Patent Laid-Open No. 2001-210126
  • the photodiode 42 is mounted on the LED substrate 35b, the design is inevitable to be mounted in the chassis 36c. For this reason, it is easily affected by the LED 33 placed near the photodiode 42, but is not easily affected by other light sources such as a lamp, and the entire color of the light source irradiated to the liquid crystal panel 40 is accurately detected. There is a problem that you can not. In addition, there is a problem in that it is necessary to provide an opening for the photodiode 42 in the reflection sheet 30b and a wiring for connecting the photodiode 42 to the LED driving substrate 44b.
  • the present invention has been made in view of such circumstances, and has a transmission portion that transmits light from the lamp holding portion side to the attachment portion side, and the light transmission property is provided on the attachment portion side of the transmission portion. It is an object of the present invention to provide a lamp clip, a light source device, and a liquid crystal display device that can accurately detect the color of light applied to a liquid crystal panel by providing projections.
  • the present invention provides a lamp clip capable of more accurately detecting the color of light irradiated to the liquid crystal panel by providing a light-transmitting protrusion on the lamp holding portion side of the transmitting portion. Another object is to provide a light source device and a liquid crystal display device.
  • the projection on the lamp holding portion side is provided with a light diffusing means for diffusing the light transmitted through the projection, so that light of a plurality of colors led to the tip of the projection on the mounting portion side can be obtained.
  • Another object of the present invention is to provide a lamp clip, a light source device, and a liquid crystal display device that can reduce the unevenness of the lead.
  • the protrusion on the attachment portion side is provided with a light diffusing means for diffusing the light transmitted through the protrusion, so that the light of a plurality of colors led to the tip of the protrusion on the attachment portion side is provided.
  • Another object of the present invention is to provide a lamp clip, a light source device, and a liquid crystal display device that can reduce lead-out unevenness.
  • a rough surface is formed on the surface of the protrusion on the lamp holding portion side and the protrusion on the mounting portion side.
  • the support for supporting the lamp is provided with an insertion hole into which the protrusion on the mounting portion side of the lamp clip is inserted, thereby accurately detecting the color of light irradiated on the liquid crystal panel.
  • Another object is to provide a light source device and a liquid crystal display device.
  • the present invention also provides a light source device and a liquid crystal device that can accurately detect the color of light applied to the liquid crystal panel by disposing light receiving means in the vicinity of the tip of the protrusion on the mounting portion side of the lamp clip. Another object is to provide a display device.
  • a lamp clip according to the present invention is a lamp clip including a mounting portion that is attached to a support that supports a lamp, and a lamp gripping portion that grips the lamp, from the lamp gripping portion side to the mounting portion side. And a light-transmitting protrusion on the attachment portion side of the light-transmitting portion.
  • the present invention it is possible to guide light to the tip portion of the protrusion on the lamp holding portion side force attaching portion side.
  • the light on the lamp holding portion side can be guided to a predetermined position such as the position of the color sensor on the back side of the support that supports the lamp.
  • a predetermined position such as the position of the color sensor on the back side of the support that supports the lamp.
  • the position of the light receiving means such as the color sensor can be arranged on the back side of the support that supports the lamp. In this case, it is not necessary to provide a color sensor opening in the reflection sheet.
  • the lamp clip according to the present invention is characterized in that a light transmitting protrusion is provided on the lamp holding portion side of the transmitting portion.
  • the lamp clip according to the present invention is characterized in that the protrusion on the lamp holding portion side has a light diffusing means for diffusing light passing through the protrusion.
  • the light of a plurality of colors introduced into the projection on the lamp holding portion side can be diffused by the light diffusion means, and the diffused light of the plurality of colors is applied to the tip of the projection on the mounting portion side.
  • Derivation can be achieved, and derivation unevenness can be reduced. Accordingly, it is possible to take out light of a plurality of colors with little derivation unevenness from the tip of the protrusion on the mounting portion side, and to accurately detect the amount of light of the plurality of colors by the color sensor.
  • the lamp clip according to the present invention is characterized in that the protrusion on the mounting portion side includes a light diffusing means for diffusing light transmitted through the protrusion.
  • the light of the plurality of colors introduced into the protrusion on the lamp holding portion side force attaching portion side can be diffused by the light diffusing means, and the diffused light of the plurality of colors is diffused on the attaching portion side. It can be led out to the tip of the projection, and lead-out unevenness can be further reduced. Therefore, light of a plurality of colors with little derivation unevenness can be taken out from the tip of the protrusion on the mounting portion side, and the amount of light of the plurality of colors can be accurately detected by the color sensor.
  • the light diffusing means is a rough surface formed on a surface of the protrusion on the lamp holding portion side and a protrusion on the mounting portion side. .
  • the light of a plurality of colors introduced into the protrusion on the lamp holding portion side can be diffused by the rough surface of the protrusion, and the light passing through the protrusion on the attachment portion side can be diffused.
  • the diffused light of a plurality of colors can be led out to the tip of the protrusion on the mounting portion side, and the unevenness of derivation can be further reduced. Accordingly, the light of a plurality of colors with less derivation unevenness can be taken out from the tip of the protrusion on the mounting portion side, and the light amounts of the lights of the plurality of colors can be detected more accurately by the color sensor.
  • the light source device has an insertion hole into which a projection on the attachment portion side of the lamp clip is inserted, a support body that supports the lamp, and the attachment portion is attached to the support body.
  • the above-mentioned lamp clip is provided.
  • the lamp holding portion side force can guide light to the back side of the support that supports the lamp, prevents the influence of the nearby LED, which has been a problem in the past, and the lamp holding portion side The color of can be detected accurately.
  • the position of the light receiving means such as a color sensor It becomes possible to arrange
  • the light source device is characterized in that a light receiving means is arranged in the vicinity of the tip of the protrusion on the mounting portion side of the lamp clip.
  • the light guided to the back side of the support from the lamp holding part side by the protrusion on the mounting part side can be detected by the light receiving means, and the vicinity of the problem that has been a problem in the past can be detected.
  • the effect of the LED can be prevented, and the color of the light applied to the liquid crystal panel can be accurately detected.
  • the light receiving means can be mounted on the LED drive board without being mounted on the LED substrate, the conventional wiring for connecting the light receiving means and the drive board is not required. Further, it is not necessary to provide an opening for the color sensor on the reflection sheet.
  • a liquid crystal display device includes a liquid crystal panel and the light source device described above.
  • the lamp holding unit side force of the light source device can guide light to the back side of the support that supports the lamp, and can accurately detect the color on the lamp holding unit side.
  • the position of the light receiving means such as a color sensor can be arranged on the back side of the support that supports the lamp.
  • the light near the liquid crystal panel is guided from the projection on the lamp holding portion side to the projection on the mounting portion side, and the color of the light irradiated on the liquid crystal panel is detected more accurately. be able to.
  • light of a plurality of colors can be taken out from the tip of the protrusion on the mounting portion side with little derivation unevenness, and the light quantity of the light of the plurality of colors can be accurately detected by the color sensor. It is possible to do.
  • the present invention it is possible to finely diffuse the rough surface of the lamp holding part side protrusion and the rough surface of the surface of the mounting part side protrusion, and to emit light of a plurality of colors with even less derivation unevenness.
  • the It can be taken out from the tip of the attachment-side projection, and the amount of light of multiple colors can be detected more accurately by the color sensor.
  • the present invention it is possible to guide the light to the back side of the support that supports the lamp holding portion side force lamp, thereby preventing the influence of the nearby LED, which has been a problem in the past, and holding the lamp.
  • the side color can be accurately detected.
  • the position of the light receiving means such as the color sensor can be arranged on the back side of the support that supports the lamp.
  • the light guided from the lamp holding part side to the back side of the support by the protrusion on the mounting part side can be detected by the light receiving means, and the vicinity that has been a problem in the past The effect of the LED can be prevented and the color of the light irradiating the LCD panel can be accurately detected. Furthermore, since the light receiving means can be mounted on the LED drive board without being mounted on the LED substrate, the conventional wiring for connecting the light receiving means and the drive board is not necessary.
  • FIG. 1 is a side view showing an example of a lamp clip.
  • FIG. 2 is an exploded perspective view of a light source device and a liquid crystal display device to which a lamp clip is attached.
  • FIG. 3 is a cross-sectional view of a main part of a lamp clip portion of the light source device.
  • FIG. 4 (a) is an enlarged view of the main part of the reflecting sheet surface showing an example of the fitting hole and the insertion hole, and (b) and (c) are main parts of the reflecting sheet surface showing an example of attaching the lamp clip. It is an enlarged view.
  • FIG. 5 is a side view showing another example of a lamp clip.
  • FIG. 6 is a perspective view showing another configuration of the lamp clip of the light source device.
  • FIG. 7 is an exploded view showing a part of the configuration of the light source device.
  • FIG. 8 is a front view showing the configuration of the chassis of the light source device.
  • FIG. 9 is an enlarged cross-sectional view showing a configuration of a main part of the light source device.
  • FIG. 10 is a simplified cross-sectional view showing a configuration example of a conventional light source device.
  • FIG. 1 is a side view showing an example of a lamp clip according to the present invention
  • FIG. 2 is an exploded perspective view of a light source device and a liquid crystal display device to which the lamp clip is attached
  • FIG. 3 is a cross-sectional view of a main part of the lamp clip portion of the light source device. It is.
  • the lamp clip 10 includes U-shaped lamp gripping portions 14 and 14 that sandwich the outer peripheral portion of the lamp 34 on both short sides of the upper surface of the rectangular flat plate 12 in plan view.
  • An upper projection 20 that suppresses the stagnation of the optical sheet 38 such as a diffusion sheet is provided in the central part of the holding part side), and is integrally formed of a synthetic resin having translucency.
  • cylindrical mounting projections 16 and 16 that extend in the opposite direction to the lamp holders 14 and 14 and whose tips 17 protrude in a disk shape, Further, a lower protrusion 18 is provided at the center of the lower surface of the flat plate 12.
  • the upper projection 20 constitutes a projection on the lamp holding portion side
  • the lower projection 18 constitutes a projection on the mounting portion side
  • the side surfaces of the long sides of the flat plate 12 are each provided with a semicircular projection plate so as to be point-symmetric with respect to the upper projection 20.
  • the entire lamp clip 10 is transparent and can transmit light. That is, the entire flat plate 12 is a transmission part.
  • FIG. 3 As shown in FIG. 3, an LED board 35 is arranged under the reflective sheet 30, and a box-shaped chassis 36 is arranged under the LED board 35.
  • the reflective sheet 30, the LED board 35, and the chassis 36 are arranged. Constitutes a support for supporting the lamp 34.
  • Each of the reflection sheet 30, the LED board 35, and the chassis 36 is similarly provided with fitting holes 32, 32 into which the mounting protrusions 16, 16 are inserted, and an insertion hole 31 into which the lower protrusion 18 is inserted.
  • the fitting holes 32, 32 and the insertion hole 31 are opened at the same position in the vertical direction.
  • FIG. 4 is an enlarged view of a main part of the surface of the reflection sheet 30 showing examples of the fitting holes 32, 32 and the insertion hole 31, and FIGS. 4 (b) and 4 (c) show examples of mounting the lamp clip 10.
  • FIG. 4 is an enlarged view of a main part of the surface of the reflection sheet 30.
  • the fitting holes 32, 32 are, for example, daruma-shaped through-holes having a narrowed portion in the middle of the opening edge, and one open area and the other open area with the narrowed portion as a boundary. .
  • the fitting holes 32, 32 are inserted portions 32b, 32b into which the mounting projections 16, 16 of the lamp clip 10 are inserted, and the mounting projections 16, 16 moved in the direction along the reflection sheet 30 from the insertion portions 32b, 32b. And clamping portions 32a and 32a.
  • the opening 32b, 32b has a larger opening 17 than the mounting protrusions 16, 16 of the lamp clip 10 and the tip 17 larger than the tip 17 of the lamp clip 10, and the opening of the holding parts 32a, 32a has a larger size than the lamp clip 10.
  • the mounting protrusions 16 and 16 are approximately the same size, and the mounting protrusions 16 and 16 can be fitted (clamped).
  • the arrangement of the clamping portions 32a and 32a with respect to the insertion portions 32b and 32b of the two fitting holes 32 and 32 is opposite to each other.
  • two fitting holes 32, 32 are juxtaposed, and the holding part 32a of one fitting hole 32 is arranged in the left direction with respect to the insertion part 32b, and the holding part of the other fitting hole 32 32a is arranged rightward with respect to the insertion portion 32b.
  • the center interval between the two fitting holes 32, 32 is the same as the center interval between the two mounting protrusions 16, 16 of the lamp clip 10.
  • an insertion hole 31 into which the lower protrusion 18 of the lamp clip 10 is inserted is provided at the center of the two sandwiching portions 32a and 32a.
  • the lamp clip 10 mounting protrusions 16, 16 Is slightly higher than the thickness of the reflection sheet 30, the LED board 35, and the chassis 36, and the fitting holes of the reflection sheet 30, the LED board 35, and the chassis 36 as shown in FIG. Mounting protrusions 16 and 16 are inserted into 32 and 32, respectively.
  • FIGS. 4 (b) and (c) the lamp holders 14 and 14 of the lamp tip 10 are omitted.
  • the lower protrusion 18 of the lamp clip 10 is inserted into the insertion hole 31, and the two mounting protrusions 16, 16 of the lamp clip 10 are inserted into the two fitting holes 32, 32. Are inserted into the insertion portions 32b and 32b, respectively.
  • the lamp clip 10 is rotated counterclockwise with the lower protrusion 18 as the rotation center axis, and the mounting protrusions 16, 16 are held between the fitting holes 32, 32. Fit to 32a, 32a.
  • the mounting protrusions 16 and 16 When the mounting protrusions 16 and 16 are fitted to (pinched) the clamping portions 32a and 32a, the reflecting sheet 30, LED board 35, and chassis are formed by the flat plate 12 of the lamp clip 10 and the tips 17 of the mounting protrusions 16 and 16. 36 is held integrally, and the lamp clip 10 is attached to a support made up of a reflective sheet 30, an LED substrate 35, and a chassis 36. At this time, the insertion portions 32 b and 32 b are covered with the semicircular projection plate of the lamp clip 10. Further, the tip of the lower protrusion 18 is positioned near the photodiode 42 of the LED drive substrate 44 as shown in FIG.
  • the reflection sheet 30 has an opening 30 a at a position corresponding to the LED 33 of the LED substrate 35.
  • the LED 33 is driven by a drive circuit of an LED drive board 44 disposed outside the chassis 36.
  • the LED drive board 44 is provided with light receiving means such as a photodiode 42 at a position below the insertion hole 31 (a position corresponding to the tip of the lower protrusion 18 of the lamp clip 10).
  • the drive circuit controls the LED 33 based on the color detected by the photodiode 42.
  • Photodiode 42 can detect R (red), G (green), and B (blue), and LED33 outputs R, G, and B light. Is possible.
  • the lamp clip 10 is attached to a plurality of places on a support body including the reflection sheet 30, the LED substrate 35, and the chassis 36. However, the color is not detected or introduced or derived by the photodiode 42!
  • a white lamp clip (see FIG. 10) that reflects the same light as in the past may be used.
  • the lamp clips 10 are not arranged in a line on the reflective sheet 30, but are divided into an odd-numbered lamp clip line and an even-numbered lamp clip line. It is.
  • the lamp holder 14 of the lamp clip 10 holds the lamp 34, and the upper protrusion 20 of the lamp clip 10 prevents the optical sheet 38 from being squeezed, and the liquid crystal panel 40 is placed on the optical sheet 38. Is arranged.
  • the light around the upper protrusion 20 is guided to the photodiode 42 through the upper protrusion 20 and the lower protrusion 18 mainly of the lamp clip 10. Then, color information is sent from the photodiode 42 to the LED drive substrate 44, and drive control of the LED 33 is performed based on the color information. Since the light around the upper protrusion 20 above the reflective sheet 30 is guided to the photodiode 42 below the reflective sheet 30, there is no conventional problem that is affected by the light output from the LED 33. 42 can accurately detect the light around the upper protrusion 20. Therefore, color adjustment can be performed accurately. Further, since the photodiode 42 is disposed on the LED drive substrate 44, the conventional wiring for connecting the photodiode 42 and the LED drive substrate 44 is not necessary. Further, it is not necessary to provide an opening for the conventional photodiode 42 in the reflection sheet 30.
  • the entire lamp clip 10 is transparent, and light is transmitted through the entire lamp clip 10. Only a part of the lamp clip 10 is configured to transmit light. It is also possible.
  • FIG. 5 is a side view showing another example of the lamp clip.
  • the upper protrusion 20 and the lower protrusion 18 are transparent and can transmit light, and the other parts are white and reflect light.
  • the upper protrusion 20 and the lower protrusion 18 are in contact with each other in the flat plate 12a, and light can be transmitted from the upper protrusion 20 to the lower protrusion 18. That is, the upper projection 20 and the lower projection 18 are inserted into the flat plate 12, and the insertion portion is a transparent portion.
  • FIG. 6 is a perspective view showing a configuration of a lamp clip of a light source device according to another embodiment of the present invention
  • FIG. 7 is an exploded view showing a part of the configuration of the light source device according to the present invention
  • FIG. I is a front view showing the structure of the chassis
  • FIG. 9 is an enlarged cross-sectional view showing the structure of the main part.
  • the configuration of the lamp clip of the example of the present invention is made of a synthetic resin having translucency.
  • the lamp clip 10 has a rectangular flat plate 12 and a protruding surface on one surface of the flat plate 12.
  • the light emitted from the lamp 34 is projected between the two concave lamp holding portions 14, 14 and the lamp holding portions 14, 14 that are fitted and held in the middle of the two adjacent lamps 34, 34.
  • the lamp holders 14 and 14 have two holding pieces for holding the lamp 34.
  • the upper protrusion 20 has a conical shape and is configured to diffuse light introduced into the upper protrusion 20 by forming a rough surface 20a like a satin surface.
  • the lower protrusion 18 has a cylindrical shape concentric with the upper protrusion 20, and is opened in the reflection sheet 30, the LED substrate 35, and the chassis 36, and is passed through the insertion hole 31.
  • a color sensor 42a such as a photodiode for detecting each light quantity of the three primary colors derived from the lower protrusion 18 is disposed on the LED drive board 44 at a position facing the tip of the lower protrusion 18 and the lower protrusion.
  • a light shielding cover 9 is disposed on both sides of 18 and at positions facing the fitting holes 32, 32.
  • FIG. 7 shows an overall configuration diagram of the light source device of the present invention in which the lamp clip is incorporated.
  • the light source device shown in FIG. 7 houses a cylindrical lamp 34 in which a plurality of lamps are juxtaposed, a plurality of LED boards 35 having a plurality of LEDs 33, the lamp 34 and the LED board 35, and A chassis 36 having a wall 36a, a reflection sheet 30 for reflecting light emitted from the lamp 34 and LED 33 to the open side of the chassis 36, and a lamp clip 10 for holding the middle of the lamp 34 to the rear wall 36a.
  • the chassis 36 includes a frame portion 36b having a rectangular parallelepiped shape, and a peripheral portion coupled to the frame portion 36b. And a rear wall 36a for closing the rear side end, and the front side is open. On the two opposite sides of the frame portion 36b, fitting recesses are fitted in which both ends of the lamp 34 are fitted.
  • a plurality of insertion holes 31 are formed in the rear wall 36 a between two adjacent lamps 34 and spaced apart in the longitudinal direction of the lamps 34, and on both sides of the insertion holes 31, In addition, fitting holes 32 and 32 are formed at positions opposite to the lamp 34, respectively.
  • the insertion hole 31 and the plurality of fitting holes 32, 32 each constitute a set, and one lamp clip 10 A lower protrusion 18 and a plurality of mounting protrusions 16 and 16 are configured to be attached.
  • This series of mounting means is arranged in multiple numbers with respect to the lamp arrangement direction of the chassis 36, and one lamp clip 10 is attached in the lamp arrangement direction on the chassis 36 while holding every two adjacent lamps. Make it possible.
  • the reflection sheet 30 is made of a single synthetic resin sheet, and has an insertion hole 31 and fitting holes 32 and 32 arranged on both sides of the insertion hole 31 and a plurality of openings 30a corresponding to the LED 33. It has been done.
  • An LED substrate 35 is juxtaposed between the reflection sheet 30 and the rear wall 36a, and the reflection sheet 30 is supported on the LED substrate 35.
  • the LED substrate 35 is disposed at a position where the LED 33 is inserted into the opening 30a.
  • the LED board 35 has an insertion hole 31 and a fitting hole 32.
  • the LED 33 includes a plurality of LED chips having different emission colors. Each LED chip is connected to an LED drive substrate 44, and the light output is adjusted by the current applied by the LED drive substrate 44.
  • the LED drive board 44 is attached to the outside of the rear wall 36a so as to be separated from the rear wall 36a, and current is injected into each LED chip by an instruction signal output from a control unit using a microprocessor. Is configured to do.
  • a color sensor 42a is mounted on the LED drive board 44, and locking holes 44a and 44a are formed on both sides of the color sensor 42a.
  • the lamp 34 is a cold cathode tube having electrodes at both ends, and an inverter circuit board is connected to the electrode of each lamp 34, and the brightness is controlled by a pulse width modulation signal. .
  • the light source device is configured in a state as shown in FIG.
  • the lower protrusion 18 is inserted into the insertion hole 31, and the mounting protrusions 16, 16 are threadedly locked into the fitting holes 32, 32.
  • the rear wall 36a The LED substrate 35 and the reflection sheet 30 are fixedly fixed between the flat plate 12 and the flat plate 12.
  • the upper protrusion 20 is disposed between two adjacent lamps 34, 34 so that a part of light emitted from the lamp 34 and the LED 33 is introduced.
  • the tip of the lower protrusion 18 faces the color sensor 42a, and the color sensor 42a detects the light amounts of the three primary colors taken out from the rear wall 36a of the tip force of the lower protrusion 18.
  • the color sensor 42a has a circular detection area approximately equal to the tip area of the lower protrusion 18, and three light amounts of different emission colors are detected at three equal positions in the circumferential direction of the detection area.
  • One element is arranged, and each element is connected to the control unit.
  • the lamp clip 10 can be prevented from leaking to the outside of the rear wall 36a from the fitting hole 32 established for fixing the rear wall 36a to the rear wall 36a.
  • the introduction to the protrusion 18 can be shielded by the shielding plate portions 91 and 91.
  • the LED board 35 is positioned and juxtaposed at a predetermined position in the chassis 36, and the opening 30 a corresponds to the LED 33 on the upper side of the LED board 35.
  • the reflection sheet 30 is placed, and the middle of the plurality of lamps 34 is fixed to the inner side of the rear wall 36a by the lamp clip 10, and the LED driving board 44 is attached to the outer side of the rear wall 36a.
  • 44 is provided with a color sensor 42a and a light-shielding cover 9.
  • the color sensor 42a detects the light amounts of the three primary colors emitted from the Veg lamp 34 and the LED 33 to eliminate color unevenness on the image display surface.
  • the control unit outputs an instruction signal to the LED drive board 44 based on the above, and the LED drive board 44 controls the current injected into the LED element, and adjusts the amount of light emitted by the LED element.
  • the upper protrusion 20 of the lamp clip 10 that is useful for the present invention has a surface formed on a rough surface 20a such as satin, and diffuses light introduced into the upper protrusion 20, so that it diffuses at the upper protrusion 20 portion.
  • the three primary colors can be taken out within the volume of the lower protrusion 18 and the tip force of the lower protrusion 18 can be taken out. Therefore, the light amount of the three primary colors by the color sensor 42a can be accurately detected, and the light amount emitted from the LED element can be accurately adjusted based on the light amount detected by the color sensor 42a.
  • the light source device configured as described above is mainly used as a light source of a liquid crystal display device.
  • This liquid crystal display device has an image display surface for displaying TV images on the front side, a rectangular parallelepiped panel, a light source device arranged on the back side of the panel, and a rectangular front surface surrounding the peripheral portion of the panel.
  • a cabinet and a back cabinet covering the light source device are provided.
  • the upper projection 20 of the lamp clip 10 is provided with light diffusing means such as satin, but in addition, light diffusing means such as satin is provided on the surfaces of the upper projection 20 and the lower projection 18. As a configuration.
  • the lamp clip 10 includes a pair of lamp holding portions 14 and 14, and is configured to hold two adjacent lamps 34 and 34.
  • the lamp clip 10 includes one lamp holding portion 14 and one lamp. As a configuration that holds 34.
  • the power provided by the light emitting lamp including the lamp 34 and the LED 33 is used.
  • the LED 33 is eliminated and only the lamp 34 is provided, and a plurality of lamps 34 emit light.
  • a configuration may be adopted in which the color sensor 42a detects the amount of color light.
  • the lamp 34 is configured to include a plurality of multicolor lamps that emit multi-color light, and may include a plurality of lamps that emit single-color light.
  • the lamp clips 10 and 11 are attached to the support constituted by the reflection sheet 30, the LED substrate 35 and the chassis 36, but in addition, by the reflection sheet 30 or the chassis 36.
  • the lamp clips 10 and 11 may be attached to the support formed by the reflective sheet 30 and the chassis 36.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

L’invention concerne un clip de lampe, un dispositif à source lumineuse, un dispositif d’affichage à cristaux liquides permettant de détecter avec précision des informations de couleur d’un panneau à cristaux liquides. Le dispositif à source de lumière comporte un clip (10) de lampe comprenant une plaque plate (12) servant à transmettre de la lumière d’un module (14) de prise en sandwich de lampe à une protubérance de montage (16) et présentant une protubérance inférieure (18) transmettant la lumière au niveau de la protubérance de montage (16) de la plaque plate (12) et une protubérance supérieure (20) transmettant la lumière au niveau du module (14) de prise en sandwich de lampe de la plaque plate (12) ; un corps support (une feuille réfléchissante (30) et un châssis (36)) doté d’un trou d’insertion (31) dans lequel vient s’insérer la protubérance inférieure (18) ; et une photodiode (42) disposée au voisinage de l’extrémité de la protubérance inférieure (18) du côté du corps support opposé au module (14) de prise en sandwich de lampe.
PCT/JP2006/323711 2005-11-29 2006-11-28 Clip de lampe, dispositif a source lumineuse et dispositif d’affichage a cristaux liquides WO2007063846A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2005-344078 2005-11-29
JP2005344075 2005-11-29
JP2005344078 2005-11-29
JP2005-344075 2005-11-29

Publications (1)

Publication Number Publication Date
WO2007063846A1 true WO2007063846A1 (fr) 2007-06-07

Family

ID=38092179

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2006/323711 WO2007063846A1 (fr) 2005-11-29 2006-11-28 Clip de lampe, dispositif a source lumineuse et dispositif d’affichage a cristaux liquides

Country Status (1)

Country Link
WO (1) WO2007063846A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011119277A (ja) * 2011-03-02 2011-06-16 Panasonic Liquid Crystal Display Co Ltd 液晶表示装置
JP2012004047A (ja) * 2010-06-18 2012-01-05 Panasonic Liquid Crystal Display Co Ltd バックライトユニット及び液晶表示装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005019420A (ja) * 2004-09-15 2005-01-20 Sharp Corp バックライト装置及び液晶表示装置
JP2005208317A (ja) * 2004-01-22 2005-08-04 Hitachi Displays Ltd 液晶表示装置
JP3872810B1 (ja) * 2005-08-12 2007-01-24 シャープ株式会社 光源制御装置、照明装置及び液晶表示装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005208317A (ja) * 2004-01-22 2005-08-04 Hitachi Displays Ltd 液晶表示装置
JP2005019420A (ja) * 2004-09-15 2005-01-20 Sharp Corp バックライト装置及び液晶表示装置
JP3872810B1 (ja) * 2005-08-12 2007-01-24 シャープ株式会社 光源制御装置、照明装置及び液晶表示装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012004047A (ja) * 2010-06-18 2012-01-05 Panasonic Liquid Crystal Display Co Ltd バックライトユニット及び液晶表示装置
US8964148B2 (en) 2010-06-18 2015-02-24 Panasonic Liquid Crystal Display Co., Ltd. Backlight unit and liquid crystal display device
JP2011119277A (ja) * 2011-03-02 2011-06-16 Panasonic Liquid Crystal Display Co Ltd 液晶表示装置

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