WO2021017229A1 - 背光模组和显示装置 - Google Patents

背光模组和显示装置 Download PDF

Info

Publication number
WO2021017229A1
WO2021017229A1 PCT/CN2019/114236 CN2019114236W WO2021017229A1 WO 2021017229 A1 WO2021017229 A1 WO 2021017229A1 CN 2019114236 W CN2019114236 W CN 2019114236W WO 2021017229 A1 WO2021017229 A1 WO 2021017229A1
Authority
WO
WIPO (PCT)
Prior art keywords
led
light
led lamp
backlight module
angle
Prior art date
Application number
PCT/CN2019/114236
Other languages
English (en)
French (fr)
Inventor
刘凡成
Original Assignee
武汉华星光电技术有限公司
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 武汉华星光电技术有限公司 filed Critical 武汉华星光电技术有限公司
Priority to US16/631,178 priority Critical patent/US11061274B2/en
Publication of WO2021017229A1 publication Critical patent/WO2021017229A1/zh

Links

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
    • G02F1/133603—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
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • 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
    • G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light

Definitions

  • This application relates to the field of display technology, and in particular to a backlight module and a display device.
  • the existing backlight module has a technical problem of poor light mixing effect and needs to be improved.
  • This application provides a method for solving the technical problem of poor light mixing effect of the existing backlight module.
  • An embodiment of the present application provides a backlight module, which includes:
  • the back plate forms a cavity
  • the light source is located in the accommodating cavity and arranged on the bottom surface of the back plate, and includes at least two spliced LED light bars.
  • the LED light bars include a first LED light and a second LED light, and the first LED light is provided In the splicing area;
  • the diffusion plate is located in the accommodating cavity and is arranged in the light emitting direction of the LED light bar, and the distance between the LED light on the LED light bar and the LED light is less than a preset value;
  • the optical film is located in the accommodating cavity and arranged in the light emitting direction of the diffuser plate;
  • the end LED lamp on the LED light bar close to the splicing position has an irradiated inner diameter on the diffusion plate that is greater than the edge length to the splicing position.
  • the backlight module provided by the present application, the backlight module according to claim 1, wherein, in the splicing area, the light emitting angle of the LED lamp is a first angle, and the first angle is greater than a threshold.
  • the light-emitting angle of the first LED lamp is a first angle
  • the light-emitting angle of the second LED lamp is a second angle
  • the first angle is greater than the second angle
  • the light emitting angles of the first LED lamp and the second LED lamp are both the first angle.
  • the distance between two adjacent first LED lamps is smaller than the distance between two adjacent second LED lamps.
  • the pitch of the first LED lamps is different, and the pitch of the first LED lamps near the splicing slit is small.
  • the pitch of the first LED lights is the same.
  • the pitch of the first LED lights gradually becomes smaller in the direction close to the splicing slit.
  • the first LED lamp is a white LED lamp
  • the second LED lamp is a white LED lamp
  • the first LED lamp is a blue LED lamp
  • a conversion film is provided in the light emitting direction of the first LED lamp, and the conversion film converts blue light into white light.
  • the conversion film is arranged on the side of the diffuser plate close to the LED light bar.
  • An embodiment of the present application provides a backlight module, which includes:
  • the back plate forms a cavity
  • the light source is located in the accommodating cavity and arranged on the bottom surface of the back plate, and includes at least two spliced LED light bars.
  • the LED light bars include a first LED light and a second LED light, and the first LED light is provided In the splicing area, the first LED lamp is a white LED lamp, and the second LED lamp is a white LED lamp;
  • the diffusion plate is located in the accommodating cavity and is arranged in the light emitting direction of the LED light bar, and the distance between the LED light on the LED light bar and the LED light is less than a preset value;
  • the optical film is located in the accommodating cavity and arranged in the light emitting direction of the diffuser plate;
  • the end LED lamp on the LED light bar close to the splicing position has an irradiated inner diameter on the diffusion plate that is greater than the edge length to the splicing position.
  • the backlight module provided by the present application, the backlight module according to claim 1, wherein, in the splicing area, the light emitting angle of the LED lamp is a first angle, and the first angle is greater than a threshold.
  • the light-emitting angle of the first LED lamp is a first angle
  • the light-emitting angle of the second LED lamp is a second angle
  • the first angle is greater than the second angle
  • the light emitting angles of the first LED lamp and the second LED lamp are both the first angle.
  • the distance between two adjacent first LED lamps is smaller than the distance between two adjacent second LED lamps.
  • the pitch of the first LED lamps is different, and the pitch of the first LED lamps near the splicing slit is small.
  • the pitch of the first LED lights is the same.
  • the pitch of the first LED lights gradually becomes smaller in the direction close to the splicing slit.
  • the first LED lamp is a white LED lamp
  • the second LED lamp is a white LED lamp
  • the first LED lamp is a blue LED lamp
  • a conversion film is provided in the light emitting direction of the first LED lamp, and the conversion film converts blue light into white light.
  • the conversion film is arranged on the side of the diffuser plate close to the LED light bar.
  • the present application provides a backlight module.
  • the backlight module includes a light source, an optical film, a diffuser, a back plate, and an LED light bar on the back plate.
  • the back plate forms an accommodating cavity, and the light source is located in the accommodating cavity and arranged on the back.
  • the bottom surface of the board includes at least two spliced LED light bars.
  • the diffuser plate is located in the accommodating cavity and is arranged in the direction of the LED light bar. The distance from the LED lights on the LED light bar is less than the preset value.
  • the optical film is located in the accommodating cavity and is set in the light-emitting direction of the diffuser plate; among them, the end LED lamp on the LED light bar close to the splicing position has an illumination inner diameter on the diffuser plate that is greater than the edge length to the splicing position; When the light distance is less than the preset value, the end LED light on the LED light bar close to the splicing position will illuminate the inner diameter of the diffuser plate, which improves the technical problem of poor light mixing effect of the backlight module.
  • FIG. 1 is a first cross-sectional schematic diagram of a backlight module provided by an embodiment of the application
  • FIG. 2 is a schematic cross-sectional view of a second type of backlight module provided by an embodiment of the application
  • FIG. 3 is a third schematic cross-sectional view of the backlight module provided by the embodiment of the application.
  • FIG. 4 is a fourth schematic cross-sectional view of a backlight module provided by an embodiment of the application.
  • FIG. 5 is a fifth schematic cross-sectional view of a backlight module provided by an embodiment of the application.
  • FIG. 6 is a sixth schematic cross-sectional view of a backlight module provided by an embodiment of the application.
  • FIG. 7 is a seventh schematic cross-sectional view of a backlight module provided by an embodiment of the application.
  • the embodiment of the present application can solve this problem.
  • the splicing area is the area of one or more LED lights on one side of the splicing slit, and the spacing is the width of one LED light, plus The gap distance between adjacent LED lights; the blue LED lights are blue LED lights, the white LED lights are white LED lights, and the S is near the splicing slit
  • the length of the inner diameter of the first LED lamp projected onto the diffuser film; the distance between the first LED lamp near the splicing slit and the splicing slit is L, and the first angle and the second angle are both defined as the light emitting angle of the LED lamp
  • the threshold is the angle value when S is equal to L when the light mixing distance becomes smaller.
  • the backlight module provided by the present application includes a light source, an optical film 302, a diffuser 303, a back plate 10, and an LED light bar located on the back plate 10.
  • the back plate 10 forms a accommodating cavity.
  • the light source is located in the containing cavity and is arranged on the bottom surface of the back plate 10, and includes at least two spliced LED light bars 20.
  • the LED light bars 20 include a first LED lamp 201 and a second LED lamp 202.
  • An LED lamp 201 is arranged in the splicing area, and the diffuser plate 303 is located in the accommodating cavity and arranged in the light emitting direction of the LED light bar 20.
  • the distance between the LED light and the LED light on the LED light bar 20 is less than With a preset value, the optical film 302 is located in the accommodating cavity and is arranged in the light-emitting direction of the diffuser plate 303; wherein, the LED light at the end of the LED light bar near the splicing position is located in the diffuser
  • the irradiation inner diameter on the plate 303 is greater than the edge length to the splicing position.
  • the backlight module includes a light source, an optical film, a diffuser plate, a back plate, and an LED light bar on the back plate.
  • the back plate forms a housing cavity, and the light source is located in the housing cavity, and It is arranged on the bottom surface of the back plate and includes at least two spliced LED light bars.
  • the LED light bars include a first LED light and a second LED light.
  • the first LED light is arranged in the splicing area, and the diffuser is located
  • the optical film is located in the accommodating cavity, and is arranged in the light-emitting direction of the LED light bar, and the distance between the LED lights on the LED light bar is less than a preset value, and the optical film is located in the accommodating cavity and is arranged In the light emitting direction of the diffuser plate; wherein, the end LED lamp on the LED light bar close to the splicing position, the illumination inner diameter on the diffuser plate is greater than the edge length to the splicing position; in the mixing distance When it is less than the preset value, the first LED lamp near the splicing slit, the end LED lamp on the LED light bar close to the splicing position, the irradiation inner diameter on the diffuser plate is larger than that to the splicing position
  • the edge length improves the light mixing effect and improves the technical problem of poor light mixing effect of the backlight module.
  • the light emitting angle of the LED lamp is a first angle, and the first angle is greater than a threshold value.
  • the threshold value is required when S is equal to L
  • the light emitting angle of the blue light is the light emitting angle of a blue LED lamp without manual processing.
  • the light-emitting angle of the first LED lamp 201 is a first angle R1
  • the light-emitting angle of the second LED lamp 202 is a second angle R2
  • the first angle R1 is greater than the second angle R1.
  • Angle R2 The light-emitting angle of the first LED lamp 201 in the splicing area is large. When the light mixing distance is a fixed value, the greater the light-emitting angle of the LED lamp near the splicing slit, the better the mixing effect.
  • the light-emitting angles of the first LED lamp 201 and the second LED light 202 are both the first angle R1.
  • the light-emitting angle is set to a larger light-emitting angle. Larger than the natural light-emitting angle of white LED lights, blue LED lights can also achieve the effect of larger light-emitting angle.
  • the distance between two adjacent first LED lamps 201 is smaller than the distance between two adjacent second LED lamps 202, and only the first LED lamp near the splicing site is changed.
  • a small distance between the LED lights 201 can increase the number of LED lights per unit area, obtain greater light intensity, and improve the light mixing effect.
  • the distance between the first LED lights 201 gradually becomes smaller in the direction close to the splicing slit.
  • This arrangement can make it close to the splicing slit.
  • the density of the LED lights is higher. Under the same voltage and the light-emitting angle remains unchanged, the higher the density of the LED lights, the better the light mixing effect.
  • the distance between the first LED lights is different, and the distance between the first LED lights near the splicing slit is small.
  • the first LED lights 201 in the splicing area, have the same pitch and uniform density. In the splicing area, the distance between two adjacent first LED lights 201 is the same, which is easier to implement in process and saves costs. .
  • the first LED lamp 201 is a white LED lamp
  • the second LED lamp 202 is a white LED lamp
  • both the first LED lamp 201 and the second LED lamp 202 are set as white LED lamps. It is simple and common at the same time. By improving the pitch or the light-emitting angle of the first LED lamp 201, the embodiment can also achieve a better light mixing effect.
  • the first LED lamp 201 is a blue LED lamp
  • a conversion film 301 is provided in the light emitting direction of the first LED lamp 201.
  • the conversion film 301 converts blue light
  • the conversion film 301 can be coated on a non-light panel area, and the blue light emitted by the blue LED lamp will become white light through the light-emitting particles.
  • the conversion film 301 is arranged on the side of the diffuser plate 303 close to the LED light bar 20, and the blue light emitted by the blue LED lamp passes through the light emitting device arranged on the side of the diffuser plate.
  • the particles will become white light and will not affect the normal light emission of the display panel.
  • the entire surface of the conversion film 301 is set on one side of the diffuser plate, because the normal splicing scheme is that the conversion film 301 is set on the blue LED lamp to form a white LED lamp, and then passed Splicing, the conversion film 301 at the splicing site will have the problem of fluorescent film breakage, which will affect the continuity of light and also cause the generation of dark lines.
  • the conversion film 301 is arranged on the side of the upper diffuser to make the conversion film 301
  • the formed film is a continuous film set on the entire surface, which alleviates the problem of rupture of the fluorescent film at the splicing site.
  • the first LED lamp 201 and the second LED lamp 202 are white LED lamps, and the entire layer of the conversion film 301 is coated on the blue LED lamp to form a whole Layer of white LED lights.
  • the second LED lamp 202 is a white light LED lamp, and the entire layer of the conversion film 301 is coated on the second LED lamp 202 to form a whole layer of white light LED light.
  • the present application also provides a liquid crystal display panel.
  • the liquid crystal display panel includes a backlight module and a display screen.
  • the backlight module includes a light source, an optical film 302, a diffusion plate 303, a back plate 10, and a LED light bar, the back plate 10 forms an accommodating cavity, the light source is located in the accommodating cavity, and is arranged on the bottom surface of the back plate 10, including at least two spliced LED light bars 20, LED light bars 20 includes a first LED lamp 201 and a second LED lamp 202.
  • the first LED lamp 201 is arranged in the splicing area, and the diffuser plate 303 is located in the containing cavity and arranged in the light emitting direction of the LED light bar 20, The distance from the LED lights on the LED light bar 20 is less than a preset value, and the optical film 302 is located in the accommodating cavity and is arranged in the light emitting direction of the diffuser plate 303; wherein, the LED The end LED lights on the light bar close to the splicing position have an irradiated inner diameter on the diffuser 303 that is greater than the edge length to the splicing position.
  • the liquid crystal display panel includes a backlight module and a display screen.
  • the backlight module includes a light source, an optical film 302, a diffuser plate 303, a back plate 10, and an LED light bar on the back plate 10.
  • the back plate 10 forms a accommodating cavity, the light source is located in the accommodating cavity and is arranged on the bottom surface of the back plate 10, and includes at least two spliced LED light bars 20, the LED light bar 20 includes a first LED lamp 201 and the second LED lamp 202.
  • the first LED lamp 201 is arranged in the splicing area, and the diffuser plate 303 is located in the accommodating cavity, and is arranged in the light emitting direction of the LED light bar 20.
  • the distance between the LED lights on 20 is less than a preset value, and the optical film 302 is located in the containing cavity and is arranged in the light emitting direction of the diffuser 303; wherein, the LED light bar is close to the splicing position
  • the inner diameter of the LED lamp at the end of the diffuser plate 303 is greater than the length of the edge to the splicing position; when the light mixing distance is less than the preset value, it is close to the first LED lamp 201 at the splicing slit,
  • the LED lights at the end of the LED light bar near the splicing position have an illumination inner diameter on the diffuser plate that is greater than the length of the edge to the splicing position, which improves the light mixing effect and improves the light mixing effect of the backlight module. Best technical problem.
  • the light-emitting angle of the LED lamp in the liquid crystal display panel, as shown in FIG. 2, in the splicing area, is a first angle, and the first angle is greater than the threshold, and the light-emitting angle of blue light is generally greater than that of white light. Angle, the light emitting angle of the blue light is the light emitting angle of a blue LED lamp without manual processing.
  • the light emitting angle of the first LED lamp 201 is a first angle R1
  • the light emitting angle of the second LED lamp 202 is a second angle R2.
  • An angle R1 is greater than the second angle R2; the first LED light 201 in the splicing area has a large light-emitting angle.
  • the light emitting angles of the first LED lamp 201 and the second LED light 202 are both a first angle R1.
  • the light emitting angle is set to Larger light-emitting angles are greater than the natural light-emitting angle of white LED lights, and blue LED lights can also achieve the effect of larger light-emitting angles.
  • the distance between two adjacent first LED lamps 201 is smaller than the distance between two adjacent second LED lamps 202. Only the distance between the first LED lights 201 near the splicing point is changed, and the small distance can increase the number of LED lights per unit area, obtain greater light intensity, and improve the light mixing effect.
  • the pitch of the first LED lights 201 gradually becomes smaller in the direction close to the splicing slit.
  • the density of the LED lights close to the splicing slits is greater. Under the same voltage and the light-emitting angle remains the same, the greater the density of the LED lights, the better the light mixing effect.
  • the first LED lights 201 in the liquid crystal display panel, in the splicing area, have the same pitch and uniform density. In the splicing area, the pitch between two adjacent first LED lights 201 is the same, and the process is more It is easy to implement and saves costs.
  • the first LED lamp 201 is a white LED lamp
  • the second LED lamp 202 is a white LED lamp
  • both the first LED lamp 201 and the second LED lamp 202 are provided Since the white LED lamp has a simpler process and is more common at the same time, by improving the pitch or the light-emitting angle of the first LED lamp 201 in the embodiment, a better light mixing effect can also be achieved.
  • the first LED lamp 201 is a blue LED lamp
  • a conversion film 301 is provided in the light emitting direction of the first LED lamp 201, and The conversion film 301 converts blue light into white light.
  • the conversion film 301 can be coated on a non-light panel area, and the blue light emitted by the blue LED lamp will become white light through the light-emitting particles.
  • the conversion film 301 is arranged on the side of the diffuser 303 close to the LED light bar 20, and the blue light emitted by the blue LED light passes through the The luminous particles on one side of the diffuser plate will become white light, which will not affect the normal light emission of the display panel.
  • the entire surface of the conversion film 301 is arranged on one side of the diffusion plate, because the normal splicing scheme is that the conversion film 301 is formed on the blue LED lamp. White LED lights, and then through splicing, the conversion film 301 at the splicing will have the problem of rupture of the fluorescent film, which affects the continuity of light, and also causes the generation of dark lines.
  • the conversion film 301 is set on the side of the upper diffuser Therefore, the film formed by the conversion film 301 can be a continuous film provided on the entire surface, which alleviates the problem of cracking of the fluorescent film at the splicing site.
  • the first LED lamp 201 and the second LED lamp 202 are white LED lamps, and the conversion film 301 is coated on the blue LED lamp as a whole. Above, a whole layer of white LED lights is formed.
  • the second LED lamp 202 is a white LED lamp, and the entire layer of the conversion film 301 is coated on the second LED lamp 202 to form A whole layer of white LED lights.
  • the present application also provides a liquid crystal display device.
  • the liquid crystal display device includes a liquid crystal display panel.
  • the liquid crystal display panel includes a backlight module and a display screen.
  • the backlight module includes a light source, an optical film 302, a diffuser 303,
  • the back plate 10 and the LED light bar located on the back plate 10 form an accommodating cavity, and the light source is located in the accommodating cavity and arranged on the bottom surface of the back plate 10, including at least two splicing
  • the LED light bar 20 includes a first LED light 201 and a second LED light 202.
  • the first LED light 201 is arranged in the splicing area, and the diffuser plate 303 is located in the containing cavity and is arranged
  • the distance between the LED light bar 20 and the LED lights on the LED light bar 20 in the light emitting direction is less than a preset value
  • the optical film 302 is located in the containing cavity and is arranged on the diffuser plate 303
  • the end LED lights on the LED light bar near the splicing position, the inner diameter of the radiation on the diffuser 303 is greater than the edge length of the splicing position.
  • the liquid crystal display device includes a liquid crystal display panel, the liquid crystal display panel includes a backlight module and a display screen, the backlight module includes a light source, an optical film 302, a diffuser 303, a back plate 10, and a back
  • the LED light bar on the board 10 forms an accommodating cavity, the light source is located in the accommodating cavity, and is arranged on the bottom surface of the back plate 10, and includes at least two spliced LED light bars 20 ,
  • the LED light bar 20 includes a first LED light 201 and a second LED light 202, the first LED light 201 is arranged in the splicing area, the diffuser plate 303 is located in the containing cavity, and is arranged on the LED light bar 20 In the light emitting direction, the distance from the LED lights on the LED light bar 20 is less than a preset value, and the optical film 302 is located in the containing cavity and arranged in the light emitting direction of the diffuser 303; wherein , The end LED light on the LED light bar close
  • the light-emitting angle of the LED lamp in the splicing area, is a first angle, and the first angle is greater than the threshold, and the light-emitting angle of blue light is generally greater than that of white light.
  • the light emitting angle of the blue light is the light emitting angle of a blue LED lamp without manual processing.
  • the light emitting angle of the first LED lamp 201 is a first angle R1
  • the light emitting angle of the second LED lamp 202 is a second angle R2.
  • An angle R1 is greater than the second angle R2; the first LED light 201 in the splicing area has a large light-emitting angle.
  • the light-emitting angles of the first LED lamp 201 and the second LED light 202 are both a first angle R1.
  • the light-emitting angle is set to Larger light-emitting angles are greater than the natural light-emitting angle of white LED lights, and blue LED lights can also achieve the effect of larger light-emitting angles.
  • the distance between two adjacent first LED lamps 201 is smaller than the distance between two adjacent second LED lamps 202. Only the distance between the first LED lights 201 near the splicing point is changed, and the small distance can increase the number of LED lights per unit area, obtain greater light intensity, and improve the light mixing effect.
  • the pitch of the first LED lights is different, and the pitch of the first LED lights near the splicing slit is small.
  • the pitch of the first LED lights 201 gradually becomes smaller in the direction close to the splicing slit.
  • the density of the LED lights close to the splicing slits is greater. Under the same voltage and the light-emitting angle remains the same, the greater the density of the LED lights, the better the light mixing effect.
  • the pitch of the first LED lights 201 is the same, the density is uniform, and the splicing area, the pitch between two adjacent first LED lights 201 is the same, and the process is more It is easy to implement and saves costs.
  • the first LED lamp 201 is a white LED lamp
  • the second LED lamp 202 is a white LED lamp
  • both the first LED lamp 201 and the second LED lamp 202 are provided Since the white LED lamp has a simpler process and is more common at the same time, by improving the pitch or the light-emitting angle of the first LED lamp 201 in the embodiment, a better light mixing effect can also be achieved.
  • the first LED lamp 201 is a blue LED lamp
  • a conversion film 301 is provided in the light emitting direction of the first LED lamp 201, and The conversion film 301 converts blue light into white light.
  • the conversion film 301 can be coated on a non-light panel area, and the blue light emitted by the blue LED lamp will become white light through the light-emitting particles.
  • the conversion film 301 is arranged on the side of the diffuser 303 close to the LED light bar 20, and the blue light emitted by the blue LED light passes through the The luminous particles on one side of the diffuser plate will become white light, which will not affect the normal light emission of the display panel.
  • the entire surface of the conversion film 301 is arranged on one side of the diffusion plate, because the normal splicing scheme is that the conversion film 301 is formed on the blue LED lamp. White LED lights, and then through splicing, the conversion film 301 at the splicing will have the problem of rupture of the fluorescent film, which affects the continuity of light and also causes the generation of dark lines.
  • the conversion film 301 is set on the side of the upper diffuser Therefore, the film formed by the conversion film 301 can be a continuous film provided on the entire surface, which alleviates the problem of the fluorescent film breakage at the splicing.
  • the first LED lamp 201 and the second LED lamp 202 are white LED lamps, and the conversion film 301 is coated on the blue LED lamp. Above, a whole layer of white LED lights is formed.
  • the second LED lamp 202 is a white LED lamp, and the entire layer of the conversion film 301 is coated on the second LED lamp 202 to form A whole layer of white LED lights.
  • a large-size one is formed by splicing multiple small-size light guide plates.
  • Light guide plate, LED chips are distributed around each small light guide plate according to the side-light type.
  • This backlight structure can be divided into parts, and a single large-size light guide plate can be divided into thousands of small light guide plates, which solves the problem of large
  • the processing problem and light transmission problem of the size light guide plate, and the thickness of the backlight is reduced.
  • dark lines will appear at the seams between adjacent light guide plates, which will affect the uniformity of the entire backlight.
  • To eliminate dark lines at the seams it is necessary to have a proper light mixing distance in the backlight.
  • the light mixing distance is more than 3mm, and the thin and light design can hardly provide enough light mixing distance, which leads to the generation of dark lines.
  • S is greater than or equal to L.
  • a light mixing layer is provided between the optical film 302 and the back plate 10, and the light transmission rate of the light mixing layer is preferably greater than or equal to 90%, and the material can be polymethylmethacrylate or polymethylmethacrylate. Carbonate, in addition, can also be made of other materials with higher light transmittance and lighter weight.
  • the application provides a backlight module.
  • the backlight module includes an optical film, a diffuser plate, a back plate, and an LED light bar on the back plate.
  • the LED light bar includes a first LED lamp and a second LED lamp.
  • the optical film It is arranged on the side of the LED light bar away from the back plate, where the LED light bar is spliced along the splicing slit, the first LED light is arranged in the splicing area, and the light of the first LED light near the splicing slit is on the diffuser plate
  • the inner diameter S of the illumination is greater than the distance L between the first LED lamp near the splicing slit and the splicing slit; when the light mixing distance is less than the preset value, the first LED lamp near the splicing slit, the LED lamp
  • the LED lights at the end of the strip near the splicing position have an illumination inner diameter on the diffusion plate that is greater than the edge length to the splicing position, which

Landscapes

  • 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)

Abstract

一种背光模组，背光模组包括光源、光学膜片(302)、扩散板(303)、背板(10)以及位于背板(10)上的LED灯条，背板(10)形成容纳腔，包括至少两个拼接设置的LED灯条(20)，光源、扩散板(303)和光学膜片(302)位于容纳腔内，其中，LED灯条(20)上靠近拼接位置的末端LED灯，在扩散板(303)上的照射内径，大于到拼接位置的边缘长度；改善了背光模组存在混光效果不佳的技术问题。

Description

背光模组和显示装置 技术领域
本申请涉及显示技术领域，尤其涉及一种背光模组和显示装置。
 背景技术
目前，对于中大尺寸的mini LED只能采取多片拼接的方式来实现更大尺寸，但拼接处因为混光距离变小，混光不均，会出现暗纹。
所以，现有背光模组存在混光效果不佳的技术问题，需要改进。
 技术问题
本申请提供一种，用于解决现有背光模组存在混光效果不佳的技术问题。
 技术解决方案
为解决上述问题，本申请提供的技术方案如下：
本申请实施例提供一种背光模组，其包括：
背板，形成容纳腔；
光源，位于所述容纳腔内，且设置在所述背板的底面上，包括至少两个拼接设置的LED灯条，LED灯条包括第一LED灯和第二LED灯，第一LED灯设置于拼接区域；
扩散板，位于所述容纳腔内，且设置在所述LED灯条的出光方向上，与所述LED灯条上LED灯之间的距离小于预设值；
光学膜片，位于所述容纳腔内，且设置在所述扩散板的出光方向上；
其中，所述LED灯条上靠近拼接位置的末端LED灯，在所述扩散板上的照射内径，大于到所述拼接位置的边缘长度。
在本申请提供的背光模组中，根据权利要求1所述的背光模组，其特征在于，在拼接区域，所述LED灯的发光角度为第一角度，第一角度大于阈值。
在本申请提供的背光模组中，第一LED灯的发光角度为第一角度，第二LED灯的发光角度为第二角度，所述第一角度大于第二角度。
在本申请提供的背光模组中，第一LED灯和第二LED灯的发光角度均为第一角度。
在本申请提供的背光模组中，相邻两个所述第一LED灯间的间距，比相邻两个所述第二LED灯的间距小。
在本申请提供的背光模组中，在拼接区域，所述第一LED灯的间距不同，靠近拼接狭缝处的第一LED灯间距小。
在本申请提供的背光模组中，其中，在拼接区域，所述第一LED灯的间距相同。
在本申请提供的背光模组中，其中，在拼接区域，所述第一LED灯的间距，在靠近拼接狭缝处的方向上，逐渐变小。
在本申请提供的背光模组中，所述第一LED灯为白光LED灯，所述第二LED灯为白光LED灯。
在本申请提供的背光模组中，所述第一LED灯为蓝光LED灯，在第一LED灯的出光方向上，设置有转换膜，所述转换膜将蓝光转换为白光。
在本申请提供的背光模组中，所述转换膜设置于扩散板靠近LED灯条的一侧。
本申请实施例提供一种背光模组，其包括：
背板，形成容纳腔；
光源，位于所述容纳腔内，且设置在所述背板的底面上，包括至少两个拼接设置的LED灯条，LED灯条包括第一LED灯和第二LED灯，第一LED灯设置于拼接区域，所述第一LED灯为白光LED灯，所述第二LED灯为白光LED灯；
扩散板，位于所述容纳腔内，且设置在所述LED灯条的出光方向上，与所述LED灯条上LED灯之间的距离小于预设值；
光学膜片，位于所述容纳腔内，且设置在所述扩散板的出光方向上；
其中，所述LED灯条上靠近拼接位置的末端LED灯，在所述扩散板上的照射内径，大于到所述拼接位置的边缘长度。
在本申请提供的背光模组中，根据权利要求1所述的背光模组，其特征在于，在拼接区域，所述LED灯的发光角度为第一角度，第一角度大于阈值。
在本申请提供的背光模组中，第一LED灯的发光角度为第一角度，第二LED灯的发光角度为第二角度，所述第一角度大于第二角度。
在本申请提供的背光模组中，第一LED灯和第二LED灯的发光角度均为第一角度。
在本申请提供的背光模组中，相邻两个所述第一LED灯间的间距，比相邻两个所述第二LED灯的间距小。
在本申请提供的背光模组中，在拼接区域，所述第一LED灯的间距不同，靠近拼接狭缝处的第一LED灯间距小。
在本申请提供的背光模组中，其中，在拼接区域，所述第一LED灯的间距相同。
在本申请提供的背光模组中，其中，在拼接区域，所述第一LED灯的间距，在靠近拼接狭缝处的方向上，逐渐变小。
在本申请提供的背光模组中，所述第一LED灯为白光LED灯，所述第二LED灯为白光LED灯。
在本申请提供的背光模组中，所述第一LED灯为蓝光LED灯，在第一LED灯的出光方向上，设置有转换膜，所述转换膜将蓝光转换为白光。
在本申请提供的背光模组中，所述转换膜设置于扩散板靠近LED灯条的一侧。
 有益效果
本申请提供一种背光模组，背光模组包括光源、光学膜片、扩散板、背板以及位于背板上的LED灯条，背板形成容纳腔，光源位于容纳腔内，且设置在背板的底面上，包括至少两个拼接设置的LED灯条，扩散板位于容纳腔内，且设置在LED灯条的出光方向上，与LED灯条上LED灯之间的距离小于预设值，光学膜片位于容纳腔内，且设置在扩散板的出光方向上；其中，LED灯条上靠近拼接位置的末端LED灯，在扩散板上的照射内径，大于到拼接位置的边缘长度；在混光距离小于预设值时，LED灯条上靠近拼接位置的末端LED灯，在扩散板上的照射内径，改善了背光模组存在混光效果不佳的技术问题。
 附图说明
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的背光模组的第一种截面示意图；
图2为本申请实施例提供的背光模组的第二种截面示意图；
图3为本申请实施例提供的背光模组的第三种截面示意图；
图4为本申请实施例提供的背光模组的第四种截面示意图；
图5为本申请实施例提供的背光模组的第五种截面示意图；
图6为本申请实施例提供的背光模组的第六种截面示意图；
图7为本申请实施例提供的背光模组的第七种截面示意图。
 本发明的实施方式
以下各实施例的说明是参考附加的图示，用以例示本申请可用以实施的特定实施例。本申请所提到的方向用语，例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本申请，而非用以限制本申请。在图中，结构相似的单元是用以相同标号表示。
针对现有背光模组存在混光效果不佳的技术问题，本申请实施例可以解决这个问题。
为了更好的说明，定义一些名词解释，如图1所示，所述拼接区域为拼接狭缝一侧的一个或多个LED灯的区域，所述间距为一个LED灯的宽度，加上与相邻LED灯间的间隙距离；所述蓝光LED灯为发出的光为蓝色的LED灯，所述白光LED灯为发出的光为白色的LED灯，所述S为靠近拼接狭缝处的所述第一LED灯投影到扩散膜上的内径长度；靠近拼接狭缝处的所述第一LED灯距离拼接狭缝的距离为L，第一角度和第二角度均定义为LED灯出光角度的一半，阈值为当混光距离变小时，S等于L时候的角度值。
如图1所示，本申请提供的背光模组包括光源、光学膜片302、扩散板303、背板10以及位于背板10上的LED灯条，所述背板10形成容纳腔，所述光源位于所述容纳腔内，且设置在所述背板10的底面上，包括至少两个拼接设置的LED灯条20，LED灯条20包括第一LED灯201和第二LED灯202，第一LED灯201设置于拼接区域，所述扩散板303位于所述容纳腔内，且设置在所述LED灯条20的出光方向上，与所述LED灯条20上LED灯之间的距离小于预设值，所述光学膜片302位于所述容纳腔内，且设置在所述扩散板303的出光方向上；其中，所述LED灯条上靠近拼接位置的末端LED灯，在所述扩散板303上的照射内径，大于到所述拼接位置的边缘长度。
在本实施例中，背光模组包括光源、光学膜片、扩散板、背板以及位于背板上的LED灯条，所述背板形成容纳腔，所述光源位于所述容纳腔内，且设置在所述背板的底面上，包括至少两个拼接设置的LED灯条，LED灯条包括第一LED灯和第二LED灯，第一LED灯设置于拼接区域，所述扩散板位于所述容纳腔内，且设置在所述LED灯条的出光方向上，与所述LED灯条上LED灯之间的距离小于预设值，所述光学膜片位于所述容纳腔内，且设置在所述扩散板的出光方向上；其中，所述LED灯条上靠近拼接位置的末端LED灯，在所述扩散板上的照射内径，大于到所述拼接位置的边缘长度；在混光距离小于预设值时，靠近拼接狭缝处的所述第一LED灯，所述LED灯条上靠近拼接位置的末端LED灯，在所述扩散板上的照射内径，大于到所述拼接位置的边缘长度，改善了混光效果，改善了背光模组存在混光效果不佳的技术问题。
在一种实施例中，如图2所示，在拼接区域，所述LED灯的发光角度为第一角度，第一角度大于阈值，在一个混光距离下，阈值为S等于L时所需的角度，所述蓝光的发光角度为不经过人工处理的蓝光LED灯的发光角度。
在一种实施例中，如图2所示，第一LED灯201的发光角度为第一角度R1，第二LED灯202的发光角度为第二角度R2，所述第一角度R1大于第二角度R2；拼接区域的第一LED灯201的发光角度大，在混光距离为一固定值时，靠近拼接狭缝处的LED灯发光角度越大，混广效果越好。
在一种实施例中，如图3所示，第一LED灯201和第二LED灯202的发光角度均为第一角度R1，在本实施例中，发光角度做成较大的发光角度，大于白光LED灯的自然发光角度，均做成蓝光LED灯也可以达到较大发光角度的效果。
在一种实施例中，如图4所示，相邻两个所述第一LED灯201间的间距，比相邻两个所述第二LED灯202的间距小，只改变拼接处附近第一LED灯201的间距，小间距可以使单位面积上设置的LED灯数量更多，获得更大的光强，同时提高混光效果。
在一种实施例中，如图4所示，在拼接区域，所述第一LED灯201的间距，在靠近拼接狭缝处的方向上，逐渐变小，这样设置可以使靠近拼接狭缝处的LED灯设置的密度更大，在相同的电压下，在发光角度不变的情况下，LED灯设置密度越大，混光效果也更好。
在一种实施例中，在拼接区域，所述第一LED灯的间距不同，靠近拼接狭缝处的第一LED灯间距小。
在一种实施例中，在拼接区域，所述第一LED灯201的间距相同，密度均匀，拼接区域，相邻两个第一LED灯201的间距相同，工艺上更容易实现，节约了成本。
在一种实施例中，所述第一LED灯201为白光LED灯，所述第二LED灯202为白光LED灯，第一LED灯201和第二LED灯202均设置为白光LED灯工艺更简单，同时也较为常见，被实施例通过改进第一LED灯201的间距或发光角度，也可以达到混光效果更好的效果。
在一种实施例中，如图5所示，所述第一LED灯201为蓝光LED灯，在第一LED灯201的出光方向上，设置有转换膜301，所述转换膜301将蓝光转换为白光，所述转换膜301可以通过涂布在非灯板区域，蓝光LED灯发出的蓝光经过所述发光粒子会变为白光。
在一种实施例中，如图5所示，所述转换膜301设置于扩散板303靠近LED灯条20的一侧，所述蓝光LED灯发出的蓝光，经过设置于扩散板一侧的发光粒子会变成白光，不会影响显示面板正常发光。
在一种实施例中，如图5所示，所述转换膜301整面设置于扩散板的一侧，因为正常拼接方案为转换膜301设置于蓝色LED灯上形成白色LED灯，然后通过拼接，拼接处的转换膜301会有荧光膜断裂的问题，影响光的延续性，也会导致暗纹的产生，所述通过转换膜301设置于上方的扩散板一侧，可以使得转换膜301形成的薄膜为连续性的整面设置薄膜，缓解了拼接处荧光膜断裂的问题。
在一种实施例中，如图6所示，所述第一LED灯201和第二LED灯202为白光LED灯，所述转换膜301整层涂布在蓝光LED灯上，形成了一整层的白光LED灯。
在一种实施例中，如图7所示，所述第二LED灯202为白光LED灯，所述转换膜301整层涂布在第二LED灯202处，形成了一整层的白光LED灯。
本申请还提供一种液晶显示面板，所述液晶显示面板包括背光模组和显示屏，所述背光模组包括光源、光学膜片302、扩散板303、背板10以及位于背板10上的LED灯条，所述背板10形成容纳腔，所述光源位于所述容纳腔内，且设置在所述背板10的底面上，包括至少两个拼接设置的LED灯条20，LED灯条20包括第一LED灯201和第二LED灯202，第一LED灯201设置于拼接区域，所述扩散板303位于所述容纳腔内，且设置在所述LED灯条20的出光方向上，与所述LED灯条20上LED灯之间的距离小于预设值，所述光学膜片302位于所述容纳腔内，且设置在所述扩散板303的出光方向上；其中，所述LED灯条上靠近拼接位置的末端LED灯，在所述扩散板303上的照射内径，大于到所述拼接位置的边缘长度。
在本实施例中，液晶显示面板包括背光模组和显示屏，所述背光模组包括光源、光学膜片302、扩散板303、背板10以及位于背板10上的LED灯条，所述背板10形成容纳腔，所述光源位于所述容纳腔内，且设置在所述背板10的底面上，包括至少两个拼接设置的LED灯条20，LED灯条20包括第一LED灯201和第二LED灯202，第一LED灯201设置于拼接区域，所述扩散板303位于所述容纳腔内，且设置在所述LED灯条20的出光方向上，与所述LED灯条20上LED灯之间的距离小于预设值，所述光学膜片302位于所述容纳腔内，且设置在所述扩散板303的出光方向上；其中，所述LED灯条上靠近拼接位置的末端LED灯，在所述扩散板303上的照射内径，大于到所述拼接位置的边缘长度；在混光距离小于预设值时，靠近拼接狭缝处的所述第一LED灯201，所述LED灯条上靠近拼接位置的末端LED灯，在所述扩散板上的照射内径，大于到所述拼接位置的边缘长度，改善了混光效果，改善了背光模组存在混光效果不佳的技术问题。
在一种实施例中，在液晶显示面板中，如图2所示，在拼接区域，所述LED灯的发光角度为第一角度，第一角度大于阈值，蓝光的发光角度通常大于白光的发光角度，所述蓝光的发光角度为不经过人工处理的蓝光LED灯的发光角度。
在一种实施例中，在液晶显示面板中，如图2所示，第一LED灯201的发光角度为第一角度R1，第二LED灯202的发光角度为第二角度R2，所述第一角度R1大于第二角度R2；拼接区域的第一LED灯201的发光角度大，在混光距离为一固定值时，靠近拼接狭缝处的LED灯发光角度越大，混广效果越好。
在一种实施例中，在液晶显示面板中，如图3所示，第一LED灯201和第二LED灯202的发光角度均为第一角度R1，在本实施例中，发光角度做成较大的发光角度，大于白光LED灯的自然发光角度，均做成蓝光LED灯也可以达到较大发光角度的效果。
在一种实施例中，在液晶显示面板中，如图4所示，相邻两个所述第一LED灯201间的间距，比相邻两个所述第二LED灯202的间距小，只改变拼接处附近第一LED灯201的间距，小间距可以使单位面积上设置的LED灯数量更多，获得更大的光强，同时提高混光效果。
在一种实施例中，在液晶显示面板中，如图4所示，在拼接区域，所述第一LED灯201的间距，在靠近拼接狭缝处的方向上，逐渐变小，这样设置可以使靠近拼接狭缝处的LED灯设置的密度更大，在相同的电压下，在发光角度不变的情况下，LED灯设置密度越大，混光效果也更好。
在一种实施例中，在液晶显示面板中，在拼接区域，所述第一LED灯201的间距相同，密度均匀，拼接区域，相邻两个第一LED灯201的间距相同，工艺上更容易实现，节约了成本。
在一种实施例中，在液晶显示面板中，所述第一LED灯201为白光LED灯，所述第二LED灯202为白光LED灯，第一LED灯201和第二LED灯202均设置为白光LED灯工艺更简单，同时也较为常见，被实施例通过改进第一LED灯201的间距或发光角度，也可以达到混光效果更好的效果。
在一种实施例中，在液晶显示面板中，如图5所示，所述第一LED灯201为蓝光LED灯，在第一LED灯201的出光方向上，设置有转换膜301，所述转换膜301将蓝光转换为白光，所述转换膜301可以通过涂布在非灯板区域，蓝光LED灯发出的蓝光经过所述发光粒子会变为白光。
在一种实施例中，在液晶显示面板中，如图5所示，所述转换膜301设置于扩散板303靠近LED灯条20的一侧，所述蓝光LED灯发出的蓝光，经过设置于扩散板一侧的发光粒子会变成白光，不会影响显示面板正常发光。
在一种实施例中，在液晶显示面板中，如图5所示，所述转换膜301整面设置于扩散板的一侧，因为正常拼接方案为转换膜301设置于蓝色LED灯上形成白色LED灯，然后通过拼接，拼接处的转换膜301会有荧光膜断裂的问题，影响光的延续性，也会导致暗纹的产生，所述通过转换膜301设置于上方的扩散板一侧，可以使得转换膜301形成的薄膜为连续性的整面设置薄膜，缓解了拼接处荧光膜断裂的问题。
在一种实施例中，在液晶显示面板中，如图6所示，所述第一LED灯201和第二LED灯202为白光LED灯，所述转换膜301整层涂布在蓝光LED灯上，形成了一整层的白光LED灯。
在一种实施例中，在液晶显示面板中，如图7所示，所述第二LED灯202为白光LED灯，所述转换膜301整层涂布在第二LED灯202处，形成了一整层的白光LED灯。
本申请还提供一种液晶显示装置，所述液晶显示装置包括液晶显示面板，所述液晶显示面板包括背光模组和显示屏，所述背光模组包括光源、光学膜片302、扩散板303、背板10以及位于背板10上的LED灯条，所述背板10形成容纳腔，所述光源位于所述容纳腔内，且设置在所述背板10的底面上，包括至少两个拼接设置的LED灯条20，LED灯条20包括第一LED灯201和第二LED灯202，第一LED灯201设置于拼接区域，所述扩散板303位于所述容纳腔内，且设置在所述LED灯条20的出光方向上，与所述LED灯条20上LED灯之间的距离小于预设值，所述光学膜片302位于所述容纳腔内，且设置在所述扩散板303的出光方向上；其中，所述LED灯条上靠近拼接位置的末端LED灯，在所述扩散板303上的照射内径，大于到所述拼接位置的边缘长度。
在本实施例中，液晶显示装置包括液晶显示面板，所述液晶显示面板包括背光模组和显示屏，所述背光模组包括光源、光学膜片302、扩散板303、背板10以及位于背板10上的LED灯条，所述背板10形成容纳腔，所述光源位于所述容纳腔内，且设置在所述背板10的底面上，包括至少两个拼接设置的LED灯条20，LED灯条20包括第一LED灯201和第二LED灯202，第一LED灯201设置于拼接区域，所述扩散板303位于所述容纳腔内，且设置在所述LED灯条20的出光方向上，与所述LED灯条20上LED灯之间的距离小于预设值，所述光学膜片302位于所述容纳腔内，且设置在所述扩散板303的出光方向上；其中，所述LED灯条上靠近拼接位置的末端LED灯，在所述扩散板303上的照射内径，大于到所述拼接位置的边缘长度；在混光距离小于预设值时，靠近拼接狭缝处的所述第一LED灯201，所述LED灯条上靠近拼接位置的末端LED灯，在所述扩散板上的照射内径，大于到所述拼接位置的边缘长度，改善了混光效果，改善了背光模组存在混光效果不佳的技术问题。
在一种实施例中，在液晶显示装置中，如图2所示，在拼接区域，所述LED灯的发光角度为第一角度，第一角度大于阈值，蓝光的发光角度通常大于白光的发光角度，所述蓝光的发光角度为不经过人工处理的蓝光LED灯的发光角度。
在一种实施例中，在液晶显示装置中，如图2所示，第一LED灯201的发光角度为第一角度R1，第二LED灯202的发光角度为第二角度R2，所述第一角度R1大于第二角度R2；拼接区域的第一LED灯201的发光角度大，在混光距离为一固定值时，靠近拼接狭缝处的LED灯发光角度越大，混广效果越好。
在一种实施例中，在液晶显示装置中，如图3所示，第一LED灯201和第二LED灯202的发光角度均为第一角度R1，在本实施例中，发光角度做成较大的发光角度，大于白光LED灯的自然发光角度，均做成蓝光LED灯也可以达到较大发光角度的效果。
在一种实施例中，在液晶显示装置中，如图4所示，相邻两个所述第一LED灯201间的间距，比相邻两个所述第二LED灯202的间距小，只改变拼接处附近第一LED灯201的间距，小间距可以使单位面积上设置的LED灯数量更多，获得更大的光强，同时提高混光效果。
在一种实施例中，在液晶显示装置中，在拼接区域，所述第一LED灯的间距不同，靠近拼接狭缝处的第一LED灯间距小。
在一种实施例中，在液晶显示装置中，如图4所示，在拼接区域，所述第一LED灯201的间距，在靠近拼接狭缝处的方向上，逐渐变小，这样设置可以使靠近拼接狭缝处的LED灯设置的密度更大，在相同的电压下，在发光角度不变的情况下，LED灯设置密度越大，混光效果也更好。
在一种实施例中，在液晶显示装置中，在拼接区域，所述第一LED灯201的间距相同，密度均匀，拼接区域，相邻两个第一LED灯201的间距相同，工艺上更容易实现，节约了成本。
在一种实施例中，在液晶显示装置中，所述第一LED灯201为白光LED灯，所述第二LED灯202为白光LED灯，第一LED灯201和第二LED灯202均设置为白光LED灯工艺更简单，同时也较为常见，被实施例通过改进第一LED灯201的间距或发光角度，也可以达到混光效果更好的效果。
在一种实施例中，在液晶显示装置中，如图5所示，所述第一LED灯201为蓝光LED灯，在第一LED灯201的出光方向上，设置有转换膜301，所述转换膜301将蓝光转换为白光，所述转换膜301可以通过涂布在非灯板区域，蓝光LED灯发出的蓝光经过所述发光粒子会变为白光。
在一种实施例中，在液晶显示装置中，如图5所示，所述转换膜301设置于扩散板303靠近LED灯条20的一侧，所述蓝光LED灯发出的蓝光，经过设置于扩散板一侧的发光粒子会变成白光，不会影响显示面板正常发光。
在一种实施例中，在液晶显示装置中，如图5所示，所述转换膜301整面设置于扩散板的一侧，因为正常拼接方案为转换膜301设置于蓝色LED灯上形成白色LED灯，然后通过拼接，拼接处的转换膜301会有荧光膜断裂的问题，影响光的延续性，也会导致暗纹的产生，所述通过转换膜301设置于上方的扩散板一侧，可以使得转换膜301形成的薄膜为连续性的整面设置薄膜，缓解了拼接处荧光膜断裂的问题。
在一种实施例中，在液晶显示装置中，如图6所示，所述第一LED灯201和第二LED灯202为白光LED灯，所述转换膜301整层涂布在蓝光LED灯上，形成了一整层的白光LED灯。
在一种实施例中，在液晶显示装置中，如图7所示，所述第二LED灯202为白光LED灯，所述转换膜301整层涂布在第二LED灯202处，形成了一整层的白光LED灯。
随着用户对液晶电视大尺寸、轻薄化、色彩艳丽要求的逐渐增高，为了便于生产制造大尺寸的背光源，现有技术中，通过对多块小尺寸的导光板进行拼接来形成大尺寸的导光板，LED芯片按照侧光式分布在每个小尺寸的导光板周围，这种背光源结构可以化整为零，将单个的大尺寸导光板分割成若千个小型导光板，解决了大尺寸导光板的加工问题和光线传播问题，并且减小了背光源厚度。但是，相邻导光板之间的拼缝处会出现暗纹，从而影响整个背光源的均匀性，若要消除拼缝处的暗纹，就需要背光源中具有适当的混光距离，一般需要3mm以上的混光距离，而轻薄化的设计很难提供足够的混光距离从而导致暗纹的产生。
本方案通过改进拼接处的LED灯，使得S大于或等于L，在混光距离减小的情况下，不影响混光效果，缓解暗纹。
在一种实施例中，光学膜片302和背板10之间设置有混光层，混光层的透光率最好大于或等于90%，其材料可以为聚甲基丙烯酸甲酯或聚碳酸酯，另外，也可以由其它透光率较高、质量较轻的材料制成。
根据上述实施例可知：
本申请提供一种背光模组，该背光模组包括光学膜片、扩散板、背板以及位于背板上的LED灯条，LED灯条包括第一LED灯和第二LED灯，光学膜片设置于LED灯条远离背板的一侧，其中，LED灯条沿着拼接狭缝拼接，第一LED灯设置于拼接区域，靠近拼接狭缝处的第一LED灯的光线在扩散板上的照射内径S，大于靠近拼接狭缝处的第一LED灯与拼接狭缝的距离L；在混光距离小于预设值时，靠近拼接狭缝处的所述第一LED灯，所述LED灯条上靠近拼接位置的末端LED灯，在所述扩散板上的照射内径，大于到所述拼接位置的边缘长度，改善了混光效果，改善了背光模组存在混光效果不佳的技术问题。
综上所述，虽然本申请已以优选实施例揭露如上，但上述优选实施例并非用以限制本申请，本领域的普通技术人员，在不脱离本申请的精神和范围内，均可作各种更动与润饰，因此本申请的保护范围以权利要求界定的范围为准。

Claims (20)

  1. 一种背光模组，其包括：
    背板，形成容纳腔；
    光源，位于所述容纳腔内，且设置在所述背板的底面上，包括至少两个拼接设置的LED灯条，LED灯条包括第一LED灯和第二LED灯，第一LED灯设置于拼接区域；
    扩散板，位于所述容纳腔内，且设置在所述LED灯条的出光方向上，与所述LED灯条上LED灯之间的距离小于预设值；
    光学膜片，位于所述容纳腔内，且设置在所述扩散板的出光方向上；
    其中，所述LED灯条上靠近拼接位置的末端LED灯，在所述扩散板上的照射内径，大于到所述拼接位置的边缘长度。
  2. 根据权利要求1所述的背光模组，其中，在拼接区域，所述LED灯的发光角度为第一角度，所述第一角度大于阈值。
  3. 根据权利要求2所述的背光模组，其中，第一LED灯的发光角度为第一角度，第二LED灯的发光角度为第二角度，所述第一角度大于第二角度。
  4. 根据权利要求2所述的背光模组，其中，第一LED灯和第二LED灯的发光角度均为第一角度。
  5. 根据权利要求1所述的背光模组，其中，相邻两个所述第一LED灯间的间距，比相邻两个所述第二LED灯的间距小。
  6. 根据权利要求5所述的背光模组，其中，在拼接区域，所述第一LED灯的间距不同，靠近拼接狭缝处的第一LED灯间距小。
  7. 根据权利要求5所述的背光模组，其中，在拼接区域，所述第一LED灯的间距相同。
  8. 根据权利要求6所述的背光模组，其中，在拼接区域，所述第一LED灯的间距，在靠近拼接狭缝处的方向上，逐渐变小。
  9. 根据权利要求1所述的背光模组，其中，所述第一LED灯为蓝光LED灯，在第一LED灯的出光方向上，设置有转换膜，所述转换膜将蓝光转换为白光。
  10. 根据权利要求9所述的背光模组，其中，所述转换膜设置于扩散板靠近LED灯条的一侧。
  11. 一种背光模组，其包括：
    背板，形成容纳腔；
    光源，位于所述容纳腔内，且设置在所述背板的底面上，包括至少两个拼接设置的LED灯条，LED灯条包括第一LED灯和第二LED灯，第一LED灯设置于拼接区域，所述第一LED灯为白光LED灯，所述第二LED灯为白光LED灯；
    扩散板，位于所述容纳腔内，且设置在所述LED灯条的出光方向上，与所述LED灯条上LED灯之间的距离小于预设值；
    光学膜片，位于所述容纳腔内，且设置在所述扩散板的出光方向上；
    其中，所述LED灯条上靠近拼接位置的末端LED灯，在所述扩散板上的照射内径，大于到所述拼接位置的边缘长度。
  12. 根据权利要求11所述的背光模组，其中，在拼接区域，所述LED灯的发光角度为第一角度，第一角度大于阈值。
  13. 根据权利要求12所述的背光模组，其中，第一LED灯的发光角度为第一角度，第二LED灯的发光角度为第二角度，所述第一角度大于第二角度。
  14. 根据权利要求12所述的背光模组，其中，第一LED灯和第二LED灯的发光角度均为第一角度。
  15. 根据权利要求11所述的背光模组，其中，相邻两个所述第一LED灯间的间距，比相邻两个所述第二LED灯的间距小。
  16. 根据权利要求15所述的背光模组，其中，在拼接区域，所述第一LED灯的间距不同，靠近拼接狭缝处的第一LED灯间距小。
  17. 根据权利要求15所述的背光模组，其中，在拼接区域，所述第一LED灯的间距相同。
  18. 根据权利要求16所述的背光模组，其中，在拼接区域，所述第一LED灯的间距，在靠近拼接狭缝处的方向上，逐渐变小。
  19. 根据权利要求11所述的背光模组，其中，所述第一LED灯为蓝光LED灯，在第一LED灯的出光方向上，设置有转换膜，所述转换膜将蓝光转换为白光。
  20. 根据权利要求19所述的背光模组，其中，所述转换膜设置于扩散板靠近LED灯条的一侧。
PCT/CN2019/114236 2019-07-29 2019-10-30 背光模组和显示装置 WO2021017229A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US16/631,178 US11061274B2 (en) 2019-07-29 2019-10-30 Backlight module and display device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910690639.X 2019-07-29
CN201910690639.XA CN110361891B (zh) 2019-07-29 2019-07-29 背光模组

Publications (1)

Publication Number Publication Date
WO2021017229A1 true WO2021017229A1 (zh) 2021-02-04

Family

ID=68222699

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/114236 WO2021017229A1 (zh) 2019-07-29 2019-10-30 背光模组和显示装置

Country Status (3)

Country Link
US (1) US11061274B2 (zh)
CN (1) CN110361891B (zh)
WO (1) WO2021017229A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110361891B (zh) * 2019-07-29 2021-01-15 武汉华星光电技术有限公司 背光模组
CN111913324A (zh) * 2020-08-18 2020-11-10 深圳市康冠科技股份有限公司 一种Mini-LED背光模组及显示装置
CN115047674B (zh) * 2022-06-14 2023-04-25 惠科股份有限公司 背光模组及显示装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203731203U (zh) * 2013-12-26 2014-07-23 Tcl海外电子（惠州）有限公司 背光模组、液晶显示器及电视机
CN106444158A (zh) * 2016-12-07 2017-02-22 超亮显示系统（深圳）股份有限公司 一种大尺寸液晶屏led矩阵直下式高亮背光模组
US20170131584A1 (en) * 2015-11-06 2017-05-11 Young Lighting Technology Inc. Display apparatus
CN109613758A (zh) * 2019-02-02 2019-04-12 京东方科技集团股份有限公司 背光模组和显示装置
CN109656058A (zh) * 2019-01-14 2019-04-19 惠州市华星光电技术有限公司 一种背光模组及其显示装置
CN110061116A (zh) * 2019-04-29 2019-07-26 惠州市华星光电技术有限公司 Mini-LED背光及其制作方法
CN110361891A (zh) * 2019-07-29 2019-10-22 武汉华星光电技术有限公司 背光模组

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102147074A (zh) * 2010-02-10 2011-08-10 深圳帝光电子有限公司 直下式超薄led背光模组
CN102537761A (zh) * 2010-12-15 2012-07-04 奇美电子股份有限公司 直下式发光二极管光源
TW201416771A (zh) * 2012-10-19 2014-05-01 Unity Opto Technology Co Ltd 背光模組
US10845522B2 (en) * 2016-06-20 2020-11-24 Dai Nippon Printing Co., Ltd. Light control film, method for driving light control film, light control member, and vehicle
US10593657B2 (en) 2016-11-01 2020-03-17 Innolux Corporation Display devices and methods for forming the same
US10546913B2 (en) * 2017-08-01 2020-01-28 Innolux Corporation Tile display devices and display devices
KR102391395B1 (ko) * 2017-11-24 2022-04-26 엘지디스플레이 주식회사 광학렌즈 및 이를 포함하는 백라이트 유닛과 액정표시장치
CN107966825B (zh) * 2017-12-26 2023-12-19 广州弥德科技有限公司 一种拼接型指向性背光源及使用该背光源的显示系统
CN208606014U (zh) * 2018-08-21 2019-03-15 信利半导体有限公司 一种背光模组
CN208999719U (zh) * 2018-08-30 2019-06-18 上海九山电子科技有限公司 Led背光灯条、背光模组和显示装置
CN109387981B (zh) * 2018-12-20 2021-07-06 惠州市华星光电技术有限公司 一种背光模组及液晶显示面板
CN109782487A (zh) * 2019-02-19 2019-05-21 惠州市华星光电技术有限公司 液晶显示器
CN109976037B (zh) * 2019-04-04 2021-12-03 Tcl华星光电技术有限公司 一种侧入式背光源及其显示装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203731203U (zh) * 2013-12-26 2014-07-23 Tcl海外电子（惠州）有限公司 背光模组、液晶显示器及电视机
US20170131584A1 (en) * 2015-11-06 2017-05-11 Young Lighting Technology Inc. Display apparatus
CN106444158A (zh) * 2016-12-07 2017-02-22 超亮显示系统（深圳）股份有限公司 一种大尺寸液晶屏led矩阵直下式高亮背光模组
CN109656058A (zh) * 2019-01-14 2019-04-19 惠州市华星光电技术有限公司 一种背光模组及其显示装置
CN109613758A (zh) * 2019-02-02 2019-04-12 京东方科技集团股份有限公司 背光模组和显示装置
CN110061116A (zh) * 2019-04-29 2019-07-26 惠州市华星光电技术有限公司 Mini-LED背光及其制作方法
CN110361891A (zh) * 2019-07-29 2019-10-22 武汉华星光电技术有限公司 背光模组

Also Published As

Publication number Publication date
CN110361891A (zh) 2019-10-22
US20210033924A1 (en) 2021-02-04
CN110361891B (zh) 2021-01-15
US11061274B2 (en) 2021-07-13

Similar Documents

Publication Publication Date Title
TWI422922B (zh) A planar lighting device, and a liquid crystal display device provided with the same
US8564739B2 (en) LED backlight system for LCD displays
TWI391753B (zh) 背光單元以及含此背光單元之液晶顯示裝置
JP4607682B2 (ja) 液晶表示装置のバックライトデバイス及びこれを利用した液晶表示装置
US20160291231A1 (en) Display apparatus
WO2021000472A1 (zh) Mini LED背光面板及背光模组
WO2021017229A1 (zh) 背光模组和显示装置
CN105572967B (zh) 透镜、包含该透镜的发光装置及包含该发光装置的背光单元
CN103885117B (zh) 导光板、背光模组及液晶模组
TWI418899B (zh) 液晶顯示器及其背光模組
KR101007079B1 (ko) 직하형 백라이트 유닛
CN103968300A (zh) 一种背光源和显示装置
US20050200773A1 (en) Backlight module and liquid crystal display device
US7857489B2 (en) Mixed light apparatus
WO2019056985A1 (zh) 导光板、背光模组及显示装置
CN214845858U (zh) 一种增亮面板及增亮装置
CN103364991A (zh) 一种背光模组和显示装置
JP3212898U (ja) 光学フィルム、バックライトモジュール及びディスプレイ装置
CN100495162C (zh) 液晶面板背光源
KR100420615B1 (ko) 광섬유를 이용한 엘시디용 백라이트
KR20120039405A (ko) 백라이트 유닛 및 이를 구비한 액정표시장치
KR101264726B1 (ko) 광학 시트 및 이를 적용한 백라이트 유닛
KR100879952B1 (ko) 직하 조광형 백라이트 장치
KR20090119399A (ko) 미세한 반사성 구슬이 분포된 백라이트용 광학 패널
KR20100005514A (ko) 정면 조광형 백라이트 장치

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19939267

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19939267

Country of ref document: EP

Kind code of ref document: A1