WO2023178674A1 - 背光模组及显示装置 - Google Patents

背光模组及显示装置 Download PDF

Info

Publication number
WO2023178674A1
WO2023178674A1 PCT/CN2022/083143 CN2022083143W WO2023178674A1 WO 2023178674 A1 WO2023178674 A1 WO 2023178674A1 CN 2022083143 W CN2022083143 W CN 2022083143W WO 2023178674 A1 WO2023178674 A1 WO 2023178674A1
Authority
WO
WIPO (PCT)
Prior art keywords
backlight module
guide plate
light
light guide
film
Prior art date
Application number
PCT/CN2022/083143
Other languages
English (en)
French (fr)
Inventor
张志鹏
崔栋
迟卫宁
齐勇乐
冷寿阳
王丰平
马青
尹大根
李文洋
翟跃
朱媛媛
Original Assignee
京东方科技集团股份有限公司
北京京东方显示技术有限公司
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 京东方科技集团股份有限公司, 北京京东方显示技术有限公司 filed Critical 京东方科技集团股份有限公司
Priority to CN202280000551.0A priority Critical patent/CN117501171A/zh
Priority to PCT/CN2022/083143 priority patent/WO2023178674A1/zh
Publication of WO2023178674A1 publication Critical patent/WO2023178674A1/zh

Links

Images

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

Definitions

  • the present disclosure relates to the field of display technology, and in particular, to a backlight module and a display device.
  • Current vehicle display products include, for example, display systems in front of the driver, central control display and co-pilot display systems, etc.
  • in-vehicle display products usually need to switch between the privacy state and the sharing state.
  • the anti-peep state needs to prevent the main driver user from viewing the display screen.
  • the prior art vehicle-mounted display anti-peep state has poor anti-peep effect.
  • the backlight module includes:
  • the first light guide plate includes: opposing first and second surfaces, and a first side connecting the first and second surfaces; the second surface includes a plurality of first dots arranged in an array;
  • At least one first light source adjacent to the first side;
  • the first inverse prism is located on the side of the first surface facing away from the second surface;
  • the first anti-peep film is located on the side of the first reverse prism away from the first light guide plate; the first anti-peep film has a first anti-peep direction, and the first anti-peep film is used to: For collimated incident light, in the first anti-peep direction Block light at a preset angle;
  • the second light guide plate is located on the side of the first privacy film away from the first inverse prism, and includes: an opposite third surface and a fourth surface, and a second side connecting the third surface and the fourth surface; the third surface is located on the first inverse prism.
  • the fourth surface is away from the side of the first privacy film; the fourth surface includes a plurality of second dots arranged in an array;
  • At least one second light source is adjacent to the second side.
  • it also includes:
  • the viewing angle control module is located on the side of the second light guide plate away from the first privacy film;
  • the first drive circuit is electrically connected to the viewing angle control module, and is used to provide electrical signals to the viewing angle control module, so that the propagation direction of the light after being emitted through the viewing angle control module changes.
  • the viewing angle control module includes: a first conductive layer, a first liquid crystal layer, and a second conductive layer arranged in a stack.
  • the third surface includes a plurality of continuously arranged prismatic structures.
  • it also includes:
  • the semi-transparent and semi-reflective film is located between the first privacy film and the second light guide plate.
  • the transflective film is a polarizing film.
  • the method further includes: a second privacy film located on the side of the second light guide plate away from the first privacy film; the second privacy film has a second privacy direction, and the second privacy direction is consistent with the first privacy film. Peeping direction crosses.
  • a plurality of second dots are arranged in an array along the first direction and the second direction; the first direction intersects with the second direction;
  • the shape of the second dot is circular or oval.
  • the width of the second light guide plate in the first direction is greater than the width of the second light guide plate in the second direction; at least one second light source is adjacent to the second side in the second direction.
  • a plurality of second dots are arranged in an array along the first direction and the second direction; the first direction intersects with the second direction;
  • the shape of the second dot is wedge-shaped
  • the backlight module also includes: a second reverse prism located on a side of the second light guide plate facing away from the first anti-peep film.
  • the first privacy-protecting direction is the second direction
  • the width of the second light guide plate in the first direction is greater than the width of the second light guide plate in the second direction
  • At least one second light source is adjacent the second side in the second direction.
  • the cross-sectional shape of the second mesh point in the first direction is an isosceles trapezoid; the cross-sectional shape of the second mesh point in the second direction is a non-right-angled, non-equilateral triangle.
  • the shape of the first dot is wedge-shaped.
  • the first light source and the second light source are located on the same side of the first light guide plate, or the first light source and the second light source are located on both sides of the first light guide plate respectively.
  • it also includes:
  • the reflective sheet is located on the side of the second surface facing away from the first surface.
  • the display device includes:
  • the display panel is located on the light exit side of the backlight module.
  • Figure 1 is a schematic structural diagram of a backlight module provided by an embodiment of the present disclosure
  • Figure 2 is a top view of the second surface of a first light guide plate provided by an embodiment of the present disclosure
  • Figure 3 is a schematic structural diagram of another backlight module provided by an embodiment of the present disclosure.
  • Figure 4 is a schematic structural diagram of another backlight module provided by an embodiment of the present disclosure.
  • Figure 5 is a schematic structural diagram of another backlight module provided by an embodiment of the present disclosure.
  • Figure 6 is a schematic structural diagram of another backlight module provided by an embodiment of the present disclosure.
  • Figure 7 is a schematic structural diagram of another backlight module provided by an embodiment of the present disclosure.
  • Figure 8 is a schematic structural diagram of another backlight module provided by an embodiment of the present disclosure.
  • Figure 9 is a schematic structural diagram of a second network point provided by an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a display device provided by an embodiment of the present disclosure.
  • the backlight module includes:
  • the first light guide plate 1 includes: an opposing first surface 2 and a second surface 3, and a first side 4 connecting the first surface 2 and the second surface 3; the second surface 3 includes a plurality of first surfaces arranged in an array. Outlets 13;
  • At least one first light source 5 is adjacent to the first side 4;
  • the first inverse prism 6 is located on the side of the first surface 2 away from the second surface 3;
  • the first anti-peep film 7 is located on the side of the first reverse prism 6 away from the first light guide plate 1; the first anti-peep film 7 has a first anti-peep direction, and the first anti-peep film 7 is used for: collimating incident light Block light at a preset angle in the first anti-peep direction;
  • the second light guide plate 8 is located on the side of the first anti-peep film 7 away from the first inverse prism 6 , and includes: opposite third surfaces 9 and fourth surfaces 10 , and a second surface connecting the third surface 9 and the fourth surface 10 . side 11; the third surface 9 is located on the side of the fourth surface 10 away from the first privacy film 7; the fourth surface 10 includes a plurality of second mesh points 14 arranged in an array;
  • At least one second light source 12 is adjacent to the second side 11 .
  • the first inverse prism is located on the light exit surface of the first light guide plate, so that the light emitted from the first light guide plate can be aggregated to form collimated emitted light, and the first anti-peep film is disposed on the first inverse prism.
  • the first privacy film can block the light at a preset angle in the first privacy direction, further narrowing the angle of the outgoing light.
  • the display product can be protected from privacy in the first privacy direction and can improve the privacy protection effect.
  • the first inverse prism can aggregate the light emitted from the first light guide plate, it can also improve the light brightness at vertical viewing angles, reduce the loss of light brightness caused by the provision of the first anti-peep film, and avoid increasing the power consumption of the backlight module.
  • the second light source and the second light guide plate are matched so that the light emitted by the second light source can emerge at a larger exit angle after passing through the second light guide plate.
  • the viewing area of the display product has a larger angle, allowing multiple people to watch the display screen together, that is, achieving a shared state. That is, the backlight module provided by the embodiment of the present disclosure can realize switching between the privacy state and the sharing state.
  • the backlight module provided by the embodiment of the present disclosure is applied to a display product that can realize switching between the privacy state and the sharing state
  • the first light source is turned on and the second light source is turned off; the sharing state state, the second light source is on and the first light source is off, or both the second light source and the first light source can be on.
  • the shared state turning off the first light source can save power consumption, and turning on the first light source can increase the brightness of the backlight module.
  • the first light source can be turned off or on according to the brightness requirement. If turning off the first light source can meet the brightness requirement of the backlight module, the first light source will be turned off to save power consumption. Otherwise, the first light source will be turned on.
  • the first privacy film blocks light at a preset angle in the first privacy direction, and the preset angle can be set according to the privacy angle required by the backlight module.
  • the backlight module further includes: a reflective sheet 15 located on the side of the second surface 3 away from the first surface 2 .
  • the backlight module provided by the embodiment of the present disclosure includes a reflective sheet, thereby improving the utilization rate of light from the backlight module.
  • the backlight module further includes: a frame; each light source, light guide plate, inverse prism, privacy film and other film layers included in the backlight module can be installed on the frame.
  • the shape of the first mesh dot 13 is wedge-shaped.
  • the surface of the first inverse prism 6 close to the first light guide plate 1 includes: a plurality of continuously arranged first prism structures 16 .
  • a plurality of first mesh dots are arranged in an array along the first direction Y and the second direction X. It should be noted that arranging a plurality of first mesh dots in an array along the first direction Y and the second direction X means that the plurality of first mesh dots arranged in an array can be divided into a plurality of first mesh dots extending along the first direction Y. columns and a plurality of first dot rows extending along the second direction X.
  • the first light source 5 points in the direction of the first side 4, the width of each first mesh point 13 in the first direction X gradually decreases, and the width of the first mesh point 13 in the first direction Y is smaller than that in the second direction
  • a plurality of first prism structures 16 are arranged along the second direction X; that is, each first prism structure extends along the first direction Y.
  • the first inverse prism is incident on the first inverse prism, and is emitted after total internal reflection in the first inverse prism, so that the first inverse prism can increase the brightness of the backlight module by shrinking the beam angles in the first direction and the second direction.
  • the backlight module only includes one first light source 5 as an example for illustration.
  • a plurality of first light sources may also be included, and the plurality of first light sources may be arranged in sequence along the first direction Y.
  • the backlight module may include only one second light source, or may include multiple second light sources.
  • the first privacy film 7 includes two oppositely arranged base material layers 18 and a plurality of trapezoidal structures 19 located between the two base material layers 18 . There is a certain distance between two adjacent trapezoidal structures 19 .
  • the trapezoidal structure includes light-absorbing material, the slope angle a of the trapezoidal structure is different, and the light emitting direction and light emitting range of the first anti-peep film are different. Therefore, the slope angle of the trapezoidal structure can be designed to match the required light emission direction and range.
  • a plurality of ladder structures 19 are arranged along the second direction X; each ladder structure 19 extends along the first direction Y. Then the first privacy direction of the first privacy film is the second direction X.
  • the emitted light angle of the first privacy film is within ⁇ 24°.
  • the light output brightness of the first anti-peep film satisfies L ⁇ 24°/L0° ⁇ 10%, for example, where L ⁇ 24° represents the brightness when the outgoing light angle is ⁇ 24°, and L0° represents the brightness when the outgoing light angle is a vertical angle.
  • the function of the first inverse prism in the embodiment of the present disclosure is mainly to aggregate the light in the first direction and the second direction to enhance the brightness of the light.
  • the first anti-peep film can block the light at a preset angle so that the first inverse prism can Together with the first anti-peep film, collimated light that meets the brightness requirements is formed.
  • the backlight module provided by the embodiment of the present disclosure can meet the following requirements: in the first anti-peep direction, the angle of the emitted light L ⁇ 45°/L0° is approximately 0.4%, and the angle L ⁇ 35°°/L0° is approximately 0.4% ; Among them, L ⁇ 45° represents the brightness with an emergent light angle of ⁇ 45°, and L ⁇ 35° represents the brightness with an emergent light angle of ⁇ 35°.
  • the viewing angle control module 20 is located on the side of the second light guide plate 8 away from the first privacy film 7;
  • the first driving circuit (not shown) is electrically connected to the viewing angle control module 20 and is used to provide electrical signals to the viewing angle control module 20 to change the propagation direction of the light after it is emitted through the viewing angle control module 20 .
  • the first driving circuit provides an electrical signal to the viewing angle control module, and the angle of the light emitted after passing through the viewing angle control module is further reduced, which can further improve the privacy protection effect.
  • the first driving circuit does not provide an electrical signal to the viewing angle control module, the light propagation direction remains unchanged after passing through the viewing angle control module, so that the setting of the viewing angle control module will not affect the normal display of the shared state. That is to say, in the specific implementation, in the anti-peep state, the first light source is turned on and the second light source is turned off, and the first driving circuit provides an electrical signal to the viewing angle control module; in the sharing state, the second light source is turned on, the first light source is turned off, and the third light source is turned off.
  • a driving circuit does not need to provide an electrical signal to the viewing angle control module, or the second light source and the first light source can both be turned on and the first driving circuit does not need to provide an electrical signal to the viewing angle control module.
  • the backlight module when the backlight module is also equipped with a viewing angle control module, the backlight module provided by the embodiment of the present disclosure can satisfy: in the first anti-peep direction, the angle of the outgoing light L ⁇ 45°/L0° ⁇ 0.5%, L ⁇ 35°/L0° ⁇ 0.75%.
  • the first inverse prism, the first anti-peep film, and the viewing angle control module collimated light that meets the brightness requirements is formed.
  • the viewing angle control module 20 includes: a first conductive layer 21, a first liquid crystal layer 22, and a second conductive layer 23 arranged in a stack.
  • the first conductive layer 21 and the second conductive layer 23 are electrically connected to the first driving circuit, and the first conductive layer 21 and the second conductive layer 523 are used to receive driving electrical signals.
  • the first liquid crystal layer 23 is used to deflect under the control of the first conductive layer 21 and the second conductive layer 23 to change the light propagation direction.
  • the backlight module provided by the embodiment of the present disclosure when applied to a display product, for example, it serves as a backlight source of the display product, thereby switching between the privacy state and the shared state of the display product.
  • the first drive circuit in the anti-peep state, provides a driving electrical signal to the viewing angle control module, and the angle of the light after it exits through the viewing angle control module is further reduced.
  • the shared state there is no need to provide electrical signals to the viewing angle control module, and the light propagation direction remains unchanged after passing through the viewing angle control module.
  • the third surface 9 includes a plurality of continuously arranged prism structures.
  • the prism structure included in the third surface as the second prism structure 17 .
  • the second prism structure included in the third surface can enable the light emitted by the second light source to exit at a larger exit angle after passing through the second light guide plate.
  • the viewing area angle of the display product is larger. It allows multiple people to watch the display together, that is, to achieve a shared state. That is to say, large-angle light emission can be achieved without additional prism sheets, which can save the thickness of the backlight module and save costs.
  • Figure 4 takes the backlight module including a viewing angle control module as an example to illustrate
  • Figure 5 takes the backlight module as not including a viewing angle control module as an example to illustrate.
  • a plurality of second prism structures are arranged along the second direction X, and each second prism structure 17 extends along the first direction X.
  • the height h1 of the second prism structure is greater than or equal to 5 microns and less than or equal to 10 microns.
  • the distance h2 between the vertices of adjacent second prism structures is greater than or equal to 30 micrometers and less than or equal to 70 micrometers.
  • the transflective film 24 is located between the first privacy film 7 and the second light guide plate 8 .
  • a semi-transparent and semi-reflective film is added to the side of the second light guide plate close to the first privacy film.
  • the semi-transparent and semi-reflective film has a mirror effect and can reflect part of the light, thereby improving the second light guide.
  • the light extraction efficiency of the light panel reduces the power consumption of the backlight module.
  • the surface of the semi-permeable and semi-reflective film can be hardened to prevent other film layers from scratching the semi-permeable and semi-reflective film and affecting its normal use.
  • the transflective film is a polarizing film.
  • the semi-transparent and semi-reflective film is a polarizing film, that is, natural light is converted into polarized light after passing through the semi-transparent and semi-reflective film, which further improves the light utilization rate of the backlight module and reduces the power consumption of the backlight module.
  • the shape of the second mesh dot 14 is circular.
  • the shape of the second network dot may also be an ellipse.
  • a plurality of second mesh dots may also be arranged in an array along the first direction Y and the second direction X. Arranging a plurality of second mesh dots in an array along the first direction Y and the second direction A second row of dots extending in the second direction X.
  • the size and distribution density of the first network dots and the second network dots can be adjusted according to actual needs.
  • the first light source 5 and the second light source 12 are respectively located on both sides of the first light guide plate 1 .
  • the first light source and the second light source may also be located on the same side of the first light guide plate.
  • FIG. 7 it also includes: a second privacy film 25 located on the side of the second light guide plate 8 away from the first privacy film 7 ; the second privacy film 25 has a second privacy direction. , the second privacy protection direction intersects with the first privacy protection direction.
  • the backlight module provided by the embodiment of the present disclosure is provided with a second privacy film, it can realize privacy protection in the first direction in the shared state and enrich the functions of the backlight module.
  • the second privacy film is used to block light at a preset angle in the second privacy direction in the shared state, and form collimated emitted light in the second privacy direction.
  • the first privacy protection direction is the second direction X
  • the second privacy protection direction is the first direction Y.
  • the shape of the first mesh point is circular or elliptical.
  • the width of the second light guide plate in the first direction is smaller than the width of the second light guide plate in the second direction; at least one second light source is adjacent to the second side in the second direction.
  • At least one first light source 5 is adjacent to the first side 4 in the second direction X.
  • the backlight module when the backlight module is also provided with a second anti-peep film, the backlight module provided by the embodiment of the present disclosure can meet the following requirements: in the second anti-peep direction, the angle of the emitted light L ⁇ 35°/L0° ⁇ 1.6%.
  • the shape of the second mesh dot 14 is wedge-shaped
  • the backlight module also includes: a second reverse prism 26 located on the side of the second light guide plate 8 away from the first privacy film 7 .
  • the backlight module provided by the embodiment of the present disclosure includes a second inverse prism and the shape of the second dot is wedge-shaped, the second inverse prism and the second light guide plate are used to achieve privacy protection in the first direction in a shared state. Therefore, there is no need to install an anti-peep film to prevent privacy in the first direction, and the light output brightness of the backlight module can be increased and the power consumption of the backlight module can be reduced while achieving privacy protection in the first direction.
  • the second inverse prism 26 includes a plurality of third prism structures 27 arranged continuously.
  • the maximum width of the second mesh dot in the direction in which the second light source points to the second side is greater than the minimum width of the second mesh dot in the direction perpendicular to the direction in which the second light source points to the second side, and when the second light source points to the second side In the direction of the side, the width of each second dot gradually decreases from one end to the other end; the arrangement direction of the plurality of third prism structures is the same as the direction in which the second light source points to the second side.
  • the width of the second light guide plate in the first direction Y is greater than the width of the second light guide plate in the second direction X;
  • At least one second light source 12 is adjacent to the second side 11 in the second direction X.
  • the second light source is arranged opposite to the side surface corresponding to the long side of the second light guide plate.
  • the second light source 12 in the second direction X, is adjacent to the second side 11; a plurality of third prism structures 27 are arranged along the second direction Extend in direction Y.
  • the minimum width h4 of the second mesh dot 14 in the first direction Y is smaller than its maximum width h5 in the second direction X.
  • the width of the second mesh dot 14 in the second direction X is from one end to It tapers off at the other end.
  • the second light source when the long side of the second light guide plate is parallel to the first direction Y, the second light source is arranged opposite to the side surface corresponding to the long side of the second light guide plate, and the third prism structure extends along the first direction Y, then the second light guide plate
  • the combination of the light plate and the second inverse prism can prevent privacy in the first direction in the shared state.
  • the second light source is driven to emit light, the light emitted from the second light source is incident into the second light guide plate from the light incident surface of the second light guide plate.
  • the design of the wedge-shaped second dots causes the light emitted from the second light guide plate to be incident on the second light guide plate.
  • the two inverse prisms are emitted after total internal reflection in the second inverse prism, so that the first inverse prism can narrow the beam angle in the first direction and the second direction, and because the extension direction of the third prism structure is in line with the long side of the second light guide plate
  • the directions are parallel, so the light beam in the first direction has a stronger degree of aggregation, so that privacy protection in the first direction can be achieved in the shared state.
  • the width of the first light guide plate in the first direction Y is greater than the width of the first light guide plate in the second direction X; as shown in Figure 8 , at least one first light source 5 is adjacent to the first side 4 in the second direction X. That is, the first light source is arranged opposite to the side surface corresponding to the long side of the first light guide plate.
  • the first light source and the second light source of the backlight module provided by the embodiments of the present disclosure are arranged opposite to the side corresponding to the long side of the light guide plate.
  • the side space corresponding to the long side of the light guide plate Larger, more light sources can be set up, so that while realizing first-direction privacy protection in the shared state, the number of light sources set up in the backlight module can also be increased, and the brightness of the backlight module can be increased.
  • the first light source 5 and the second light source 12 are respectively located on both sides of the first light guide plate 1.
  • the first light source and the second light source may also be located on the same side of the first light guide plate.
  • FIG. 8 takes as an example that the first light source and the second light source are arranged opposite to the side corresponding to the long side of the light guide plate.
  • the first light source can also be arranged opposite the side corresponding to the short side of the first light guide plate.
  • the width of each light guide plate in the first direction Y is greater than the width of the light guide plate in the second direction X, and the second light source is still adjacent to the second side in the second direction.
  • the first light source is adjacent to the first side surface in the first direction, and the extending direction of the first prism structure is perpendicular to the extending direction of the third prism structure, that is, each first prism structure extends along the second direction. .
  • the specific shapes of the wedges may be the same or different.
  • the shapes of the first mesh dot and the second mesh dot in Figure 8 are different.
  • the shape of the cross-section of the first network point is a right-angled triangle
  • the shape of the cross-section of the second network point is a non-right-angled triangle.
  • the cross-sectional shape of the second mesh point in the first direction is an isosceles trapezoid; the cross-sectional shape of the second mesh point in the second direction is a non-right-angled, non-equilateral triangle.
  • Figure 9 also shows the cross-sectional pattern 33 of the second mesh point 14 along AA' and the cross-sectional pattern 34 along BB'.
  • the cross-sectional pattern 33 along AA' is is the cross-sectional pattern of the second mesh point 14 in the first direction Y
  • the cross-sectional pattern 34 along BB' is the cross-sectional pattern of the second mesh point 14 in the second direction X.
  • the cross-sectional pattern along AA' 33 is an isosceles trapezoid
  • the cross-sectional figure 34 along BB' is a non-right-angled, non-equilateral triangle.
  • the d angle is, for example, 60°
  • the b angle in the cross-sectional pattern 34 along BB' is 60°
  • the c angle is 3°.
  • the first surface 2 includes a plurality of continuously arranged fourth prism structures 35 . This can avoid scratching the first surface after the lower surface of the first inverse prism comes into contact with the first surface.
  • the third surface of the second light guide plate includes a second prism structure, in addition to reducing a layer of prism film, it is also possible to avoid scratching the third surface after the lower surface of the second reverse prism contacts the third surface.
  • a plurality of fourth prism structures 35 are arranged along the second direction X.
  • the height of the fourth prism structure is greater than or equal to 5 microns and less than or equal to 10 microns; the distance between the vertices of adjacent fourth prism structures is greater than or equal to 30 microns and less than or equal to 70 microns.
  • the height of the fourth prism structure may be the same as the height of the second prism structure, and the distance between the vertices of adjacent fourth prism structures may be the same as the distance between the vertices of adjacent second prism structures.
  • the height of the fourth prism structure may be different from the height of the second prism structure, and the distance between the vertices of adjacent fourth prism structures may be different from the distance between the vertices of adjacent second prism structures.
  • the display panel 28 is located on the light exit side of the backlight module 32 .
  • the display panel 28 is, for example, a liquid crystal display panel, including: an array substrate 29 and a counter substrate 31 arranged opposite each other, and a second liquid crystal layer located directly between the array substrate 29 and the counter substrate 31 .
  • the array substrate 2 includes: thin film transistors and pixel electrodes arranged in an array.
  • the opposite substrate includes: a color color resistor and a black matrix.
  • the black matrix has an opening area corresponding to the sub-pixel area of the display panel, and the color color resistor is located in the opening area.
  • the array substrate or counter substrate also includes a common electrode.
  • the display device provided by the embodiment of the present disclosure can be applied to a vehicle as a vehicle-mounted display device, for example.
  • the display device provided by the embodiment of the present disclosure is: a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, or any other product or component with a display function.
  • Other essential components of the display device are understood by those of ordinary skill in the art, and will not be described in detail here, nor should they be used to limit the present disclosure.
  • the first inverse prism is located on the light exit surface of the first light guide plate, so that the light emitted from the first light guide plate can be aggregated to form collimated emitted light.
  • the first anti-peep film is provided On the side of the first inverse prism away from the first light guide plate, after the collimated light is incident on the first privacy film, the first privacy film can block the light at a preset angle in the first privacy direction, further narrowing the intensity of the emitted light. angle to form collimated emitted light.
  • the first inverse prism can aggregate the light emitted from the first light guide plate, it can also improve the light brightness at vertical viewing angles, reduce the loss of light brightness caused by the provision of the first anti-peep film, and avoid increasing the power consumption of the backlight module.

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，包括第一导光板（1），具有相对的第一表面（2）和第二表面（3），以及第一侧面（4），第二表面（3）包括多个阵列排布的第一网点（13）。至少一个第一光源（5），与第一侧面（4）相邻。第一逆棱镜（6），位于第一表面（2）背离第二表面（3）的一侧。第一防窥膜（7），位于第一逆棱镜（6）背离第一导光板（1）的一侧，第一防窥膜（7）具有第一防窥方向，用于对于准直入射光在第一防窥方向遮挡预设角度的光线。第二导光板（8），位于第一防窥膜（7）背离第一逆棱镜（6）一侧，包括相对的第三表面（9）和第四表面（10），以及连接第三表面（9）和第四表面（10）的第二侧面（11），第三表面（9）位于第四表面（10）背离第一防窥膜（7）的一侧，第四表面（10）包括多个阵列排布的第二网点（14）。至少一个第二光源（12），与第二侧面（11）相邻。还提供了包括背光模组的显示装置。

Description

背光模组及显示装置 技术领域
本公开涉及显示技术领域，尤其涉及一种背光模组及显示装置。
背景技术
随着社会的发展，人们对显示产品的应用场景需求越来越广泛，车载显示需求越来越高。
目前车载显示产品例如包括：驾驶员前方的显示系统、中控显示副驾驶显示系统等。为防止影响车辆驾驶安全，车载显示产品通常需要实现防窥态与共享态的切换。例如对于副驾驶显示系统，防窥态需要使得主驾驶用户无法观看到显示画面。但现有技术车载显示防窥态防窥效果不佳。
发明内容
本公开实施例提供的一种背光模组，背光模组包括：
第一导光板，包括：相对的第一表面和第二表面，以及连接第一表面和第二表面的第一侧面；第二表面包括多个阵列排布的第一网点；
至少一个第一光源，与第一侧面相邻；
第一逆棱镜，位于第一表面背离第二表面的一侧；
第一防窥膜，位于第一逆棱镜背离第一导光板的一侧；第一防窥膜具有第一防窥方向，第一防窥膜用于：对于准直入射光在第一防窥方向遮挡预设角度的光线；
第二导光板，位于第一防窥膜背离第一逆棱镜一侧，包括：相对的第三表面和第四表面，以及连接第三表面和第四表面的第二侧面；第三表面位于第四表面背离第一防窥膜的一侧；第四表面包括多个阵列排布的第二网点；
至少一个第二光源，与第二侧面相邻。
在一些实施例中，还包括：
视角控制模组，位于第二导光板背离第一防窥膜一侧；
第一驱动电路，与视角控制模组电连接，用于：向视角控制模组提供电信号，以使光线经过视角控制模组出射后的传播方向发生改变。
在一些实施例中，视角控制模组包括：叠层设置的第一导电层、第一液晶层、第二导电层。
在一些实施例中，第三表面包括多个连续排列棱镜结构。
在一些实施例中，还包括：
半透半反膜，位于第一防窥膜与第二导光板之间。
在一些实施例中，半透半反膜为偏光膜。
在一些实施例中，还包括：位于第二导光板背离第一防窥膜一侧的第二防窥膜；第二防窥膜具有第二防窥方向，第二防窥方向与第一防窥方向交叉。
在一些实施例中，多个第二网点沿第一方向、第二方向阵列排布；第一方向与第二方向交叉；
第二网点的形状为圆形或椭圆形。
在一些实施例中，第二导光板在第一方向上的宽度大于第二导光板在第二方向上的宽度；至少一个第二光源在第二方向上与第二侧面相邻。
在一些实施例中，多个第二网点沿第一方向、第二方向阵列排布；第一方向与第二方向交叉；
第二网点的形状为楔形；
背光模组还包括：位于第二导光板背离第一防窥膜一侧的第二逆棱镜。
在一些实施例中，第一防窥方向为第二方向；
第二导光板在第一方向上的宽度大于第二导光板在第二方向上的宽度；
至少一个第二光源在第二方向上与第二侧面相邻。
在一些实施例中，在第一方向上第二网点的截面图形为等腰梯形；在第二方向上第二网点的截面图形为非直角、非等边三角形。
在一些实施例中，第一网点的形状为楔形。
在一些实施例中，第一光源与第二光源位于第一导光板的同一侧，或者， 第一光源与第二光源分别位于第一导光板的两侧。
在一些实施例中，还包括：
反射片，位于第二表面背离第一表面的一侧。
本公开实施例提供的一种显示装置，显示装置包括：
本公开实施例提供的上述背光模组；
显示面板，位于背光模组的出光侧。
附图说明
为了更清楚地说明本公开实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简要介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域的普通技术人员来讲，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为本公开实施例提供的一种背光模组的结构示意图；
图2为本公开实施例提供的一种第一导光板的第二表面的俯视图；
图3为本公开实施例提供的另一种背光模组的结构示意图；
图4为本公开实施例提供的又一种背光模组的结构示意图；
图5为本公开实施例提供的又一种背光模组的结构示意图；
图6为本公开实施例提供的又一种背光模组的结构示意图；
图7为本公开实施例提供的又一种背光模组的结构示意图；
图8为本公开实施例提供的又一种背光模组的结构示意图；
图9为本公开实施例提供的一种第二网点的结构示意图；
图10为本公开实施例提供的一种显示装置的结构示意图。
具体实施方式
为使本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公开实施例的附图，对本公开实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本公开的一部分实施例，而不是全部的实施例。并且在不 冲突的情况下，本公开中的实施例及实施例中的特征可以相互组合。基于所描述的本公开的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本公开保护的范围。
除非另外定义，本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。
需要注意的是，附图中各图形的尺寸和形状不反映真实比例，目的只是示意说明本公开内容。并且自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。
本公开实施例提供了一种背光模组，如图1所示，背光模组包括：
第一导光板1，包括：相对的第一表面2和第二表面3，以及连接第一表面2和第二表面3的第一侧面4；第二表面3包括阵列排布的多个第一网点13；
至少一个第一光源5，与第一侧面4相邻；
第一逆棱镜6，位于第一表面2背离第二表面3的一侧；
第一防窥膜7，位于第一逆棱镜6背离第一导光板1的一侧；第一防窥膜具7有第一防窥方向，第一防窥膜7用于：对于准直入射光在第一防窥方向遮挡预设角度的光线；
第二导光板8，位于第一防窥膜7背离第一逆棱镜6一侧，包括：相对的第三表面9和第四表面10，以及连接第三表面9和第四表面10的第二侧面11；第三表面9位于第四表面10背离第一防窥膜7的一侧；第四表面10包括阵列排布的多个第二网点14；
至少一个第二光源12，与第二侧面11相邻。
本公开实施例提供的背光模组，第一逆棱镜位于第一导光板的出光面，从而可以聚合第一导光板出射光而形成准直出射光，第一防窥膜设置在第一逆棱镜背离第一导光板的一侧，准直光入射第一防窥膜后，第一防窥膜可以在第一防窥方向遮挡预设角度的光线，进一步收窄出射光的角度，当背光模组应用于显示产品时，用户处于预设角度对应的视区无法观看显示画面，显示产品可以在第一防窥方向上实现防窥，并且可以提高防窥效果。并且，由于第一逆棱镜可以聚合第一导光板出射，还可以提高垂直视角的出光亮度，减少由于设置第一防窥膜引起的出光亮度损失，避免增加背光模组的功耗。并且，本公开实施例提供的背光模组，第二光源与第二导光板搭配可以使得第二光源发出的光线经过第二导光板后可以较大出射角出射，当背光模组应用于显示产品时，显示产品的可视区角度较大，可以实现多人共同观看显示画面，即实现共享态。即本公开实施例提供的背光模组可以实现防窥态与共享态之间的切换。
需要说明的是，当本公开实施例提供的背光模组应用于可以实现防窥态与共享态之间的切换的显示产品时，在防窥态，第一光源开启而第二光源关闭；共享态，第二光源开启，第一光源关闭，或者也可以是第二光源、第一光源均开启。对于共享态，第一光源关闭可以节省功耗，第一光源开启可以提高背光模组亮度。在具体实施时，可以根据亮度需求选择第一光源关闭或开启，若第一光源关闭可以满足背光模组亮度需求，则将第一光源关闭以节省功耗，否则将第一光源开启。
需要说明的是，第一防窥膜在第一防窥方向遮挡预设角度的光线，预设角度可以根据背光模组所需的防窥角度进行设置。
在一些实施例中，如图1所示，背光模组还包括：反射片15，位于第二表面3背离第一表面2的一侧。
本公开实施例提供的背光模组包括反射片，从而可以提高背光模组的光线的利用率。
在一些实施例中，背光模组还包括：框架；背光模组包括的各光源、导 光板、逆棱镜、防窥膜等膜层可以安装于框架。
在一些实施例中，如图2所示，第一网点13的形状为楔形。
在一些实施例中，如图1所示，第一逆棱镜6靠近第一导光板1一侧的表面包括：连续设置的多个第一棱镜结构16。
在具体实施时，如图2所示，多个第一网点沿第一方向Y、第二方向X阵列排布。需要说明的是，多个第一网点沿第一方向Y、第二方向X阵列排布是指：阵列排布的多个第一网点可以划分为多个沿第一方向Y延伸的第一网点列以及多个沿第二方向X延伸的第一网点行。其中，第一光源5指向第一侧面4的方向上，每一第一网点13在第一方向X上的宽度逐渐减小，第一网点在第一方向Y上的宽度小于其在第二方向X上的宽度；多个第一棱镜结构的排列方向与第一光源指向第一侧面的方向相同，即如图1所示，在第二方向X上，第一光源5与第一侧面4相邻，多个第一棱镜结构16沿第二方向X排列；即每一第一棱镜结构沿第一方向Y延伸。这样，当驱动第一光源发光时，由第一光源射出的光线从第一导光板的入光面射入到第一导光板内，楔形第一网点的设计，使得从第一导光板出射光入射第一逆棱镜、并经第一逆棱镜内全反射后射出，从而第一逆棱镜能够通过收缩第一方向和第二方向的光束角，提升背光模组亮度。
需要说明的是，图2中以背光模组仅包括一个第一光源5为例进行举例说明。在具体实施时，也可以包括多个第一光源，多个第一光源沿第一方向Y依次排列。
当然，在具体实施时，背光模组可以仅包括一个第二光源，或者，也可以包括多个第二光源。
在一些实施例中，如图3所示，第一防窥膜7包括了相对设置的两个基材层18和位于两个基材层18之间的多个梯形结构19。相邻两个梯形结构19之间具有一定距离。
需要说明的是，梯形结构包括吸光材料，梯形结构的斜面角度a不同，第一防窥膜的出光方向和出光范围不同。从而可以通过对梯形结构的斜面角 度进行设计匹配所需的出光方向和出光范围。
在一些实施例中，如图3所示，多个梯形结构19沿第二方向X排列；每一梯形结构19沿第一方向Y延伸。则第一防窥膜的第一防窥方向为第二方向X。
在具体实施，例如第一防窥膜的出射光角度为±24°以内。第一防窥膜的出光亮度例如满足L±24°/L0°＜10％，其中，L±24°代表出射光角度为±24°的亮度，L0°代表出射光角度为垂直角度的亮度。
本公开实施例第一逆棱镜的作用主要是聚合第一方向和第二方向的光，以提升出光亮度，第一防窥膜可以将预设角度的光进行遮挡，以使在第一逆棱镜和第一防窥膜的共同作用下形成满足亮度要求的准直光。经过测试，本公开实施例提供的背光模组可以满足：第一防窥方向上，出射光的角度L±45°/L0°约为0.4％，L±35°°/L0°约为0.4％；其中，L±45°代表出射光角度为±45°的亮度，L±35°代表出射光角度为±35°的亮度。
在一些实施例中，如图4所示，还包括：
视角控制模组20，位于第二导光板8背离第一防窥膜7一侧；
第一驱动电路(未示出)，与视角控制模组20电连接，用于：向视角控制模组20提供电信号，以使光线经过视角控制模组20出射后的传播方向发生改变。
在具体实施时，第一驱动电路向视角控制模组提供电信号，光线经过视角控制模组出射后的角度进一步缩小，可以进一步提高防窥效果。当第一驱动电路未向视角控制模组提供电信号时，光线经过视角控制模组后传播方向不变，从而视角控制模组的设置不会影响共享态的正常显示。也就是说，在具体实施时，防窥态，第一光源开启而第二光源关闭、第一驱动电路向视角控制模组提供电信号；共享态，第二光源开启、第一光源关闭且第一驱动电路无需向视角控制模组提供电信号，或者也可以是第二光源、第一光源均开启且第一驱动电路无需向视角控制模组提供电信号。
经过测试，当背光模组还设置视角控制模组，本公开实施例提供的背光 模组可以满足：第一防窥方向上，出射光的角度L±45°/L0°<0.5％，L±35°/L0°<0.75％。从而在第一逆棱镜、第一防窥膜、视角控制模组的共同作用下形成满足亮度要求的准直光。
在一些实施例中，视角控制模组20包括：叠层设置的第一导电层21、第一液晶层22、第二导电层23。在具体实施时，第一导电层21和第二导电层23与第一驱动电路电连接，第一导电层21和第二导电层523用于接收驱动电信号。第一液晶层23用于在第一导电层21和第二导电层23的控制下发生偏转，改变光线传播方向。
需要说明的是，本公开实施例提供的背光模组，当背光模组应用于显示产品时，例如作为显示产品的背光源，从而显示产品防窥态与共享态之间的切换。在具体实施时，防窥态时通过第一驱动电路向视角控制模组提供驱动电信号，光线经过视角控制模组出射后的角度进一步缩小。共享态时，无需向视角控制模组提供电信号，光线经过视角控制模组后传播方向不变。
在一些实施例中，如图4、图5所示，第三表面9包括多个连续排列的棱镜结构。为了与逆棱镜的棱镜结构进行区分，我们将第三表面包括的棱镜结构描述为第二棱镜结构17。
第三表面包括的第二棱镜结构可以使得第二光源发出的光线经过第二导光板后可以较大出射角出射，当背光模组应用于显示产品时，显示产品的可视区角度较大，可以实现多人共同观看显示画面，即实现共享态。即无需额外设置棱镜片便可以实现大角度出光，可以节省背光模组的厚度，还可以节省成本。
需要说明的是，图4以背光模组包括视角控制模组为例进行举例说明，图5以背光模组未包括视角控制模组为例进行举例说明。
在具体实施时，多个第二棱镜结构沿第二方向X排列，每一第二棱镜结构17沿第一方向X延伸。
在一些实施例中，第二棱镜结构的高度h1大于等于5微米且小于等于10微米。
在一些实施例中，相邻第二棱镜结构的顶点之间的距离h2大于等于30微米且小于等于70微米。
在一些实施例中，如图6所示，还包括：
半透半反膜24，位于第一防窥膜7与第二导光板8之间。
本公开实施例提供的背光模组，在第二导光板靠近第一防窥膜一侧增设半透半反膜，半透半反膜具有镜面效果，可以反射部分光线，从而可以提高第二导光板的出光效率，降低背光模组功耗。
在一些实施例中，半透半反膜的表面可以进行硬度处理，避免其他膜层划伤半透半反膜影响其正常使用。
在一些实施例中，半透半反膜为偏光膜。
本公开实施例提供的背光模组，半透半反膜为偏光膜，即自然光通过半透半反膜后转换为偏振光，进一步提高背光模组的光线利用率，降低背光模组的功耗。
在一些实施例中，如图1、图4、图5、图6所示，第二网点14的形状为圆形。
或者，第二网点的形状也可以为椭圆形。
需要说明的是，在具体实施时，多个第二网点也可以沿第一方向Y、第二方向X阵列排布。多个第二网点沿第一方向Y、第二方向X阵列排布是指：阵列排布的多个第二网点可以划分为多个沿第一方向Y延伸的第二网点列以及多个沿第二方向X延伸的第二网点行。在具体实施时，第一网点、第二网点的尺寸、分布密度可以根据实际需要进行调整。
在一些实施例中，如图1、图4、图5、图6所示，第一光源5与第二光源12分别位于第一导光板1的两侧。
当然，在具体实施时，第一光源与第二光源也可以位于第一导光板的同一侧。
在一些实施例中，如图7所示，还包括：位于第二导光板8背离第一防窥膜7一侧的第二防窥膜25；第二防窥膜25具有第二防窥方向，第二防窥方 向与第一防窥方向交叉。
本公开实施例提供的背光模组，由于设置了第二防窥膜，从而可以在共享态实现在第一方向的防窥，丰富背光模组的功能。
需要说明的是，第二防窥膜用于在共享态实现在第二防窥方向遮挡预设角度的光线，在第二防窥方向形成准直出射光。当第一防窥方向为第二方向X时，则第二防窥方向为第一方向Y。
在一些实施例中，如图7所示，第一网点的形状为圆形或椭圆形。
在一些实施例中，第二导光板在第一方向上的宽度小于第二导光板在第二方向上的宽度；至少一个第二光源在第二方向上与第二侧面相邻。
相应的，在具体实施时，如图7所示，至少一个第一光源5在第二方向X上与第一侧面4相邻。
经过测试，当背光模组还设置第二防窥膜时，本公开实施例提供的背光模组可以满足：第二防窥方向上，出射光的角度L±35°/L0°<1.6％。
或者，共享态实现第一方向防窥也可以采用其他设置方式。在一些实施例中，如图8所示，第二网点14的形状为楔形；
背光模组还包括：位于第二导光板8背离第一防窥膜7一侧的第二逆棱镜26。
本公开实施例提供的背光模组，由于包括第二逆棱镜，且第二网点的形状为楔形，在共享态第二逆棱镜与第二导光板用于实现在第一方向防窥。从而无需设置防窥膜来实现在第一方向防窥，可以在实现第一方向防窥的同时提高背光模组的出光亮度，降低背光模组功耗。
在一些实施例中，如图8所示，第二逆棱镜26包括连续排列的多个第三棱镜结构27。
在具体实施时，在第二光源指向第二侧面的方向上第二网点的最大宽度大于垂直于第二光源指向第二侧面的方向上第二网点的最小宽度，且在第二光源指向第二侧面的方向上，每一第二网点的宽度从一端向另一端逐渐减小；多个第三棱镜结构的排列方向与第二光源指向第二侧面的方向相同。
在一些实施例中，当第一防窥方向为第二方向X时，第二导光板在第一方向Y上的宽度大于第二导光板在第二方向X上的宽度；
如图8所示，至少一个第二光源12在第二方向X上与第二侧面11相邻。
即第二光源与第二导光板长边对应的侧面相对设置。具体地，如图8所示，在第二方向X上，第二光源12与第二侧面11相邻；多个第三棱镜结构27沿第二方向X排列；即每一第三棱镜结构沿第一方向Y延伸。并且，如图8所示，第二网点14在第一方向Y上的最小宽度h4小于其在第二方向X上的最大宽度h5，第二网点14在第二方向X上的宽度从一端到另一端逐渐减小。
在具体实施时，当第二导光板长边与第一方向Y平行时，第二光源与第二导光板长边对应的侧面相对设置，第三棱镜结构沿第一方向Y延伸，则第二导光板与第二逆棱镜搭配可以在共享态实现在第一方向防窥。当驱动第二光源发光时，由第二光源射出的光线从第二导光板的入光面射入到第二导光板内，楔形第二网点的设计，使得从第二导光板出射光入射第二逆棱镜、并经第二逆棱镜内全反射后射出，从而第一逆棱镜能够通过收缩第一方向和第二方向的光束角，并且由于第三棱镜结构的延伸方向与第二导光板长边所在方向平行，因此第一方向的光线束聚合程度更强，从而可以在共享态实现在第一方向防窥。
在一些实施例中，当第一防窥方向为第二方向X时，第一导光板在第一方向Y上的宽度大于第一导光板在第二方向X上的宽度；如图8所示，至少一个第一光源5在第二方向X上与第一侧面4相邻。即第一光源与第一导光板长边对应的侧面相对设置。
本公开实施例提供的背光模组第一光源、第二光源均与导光板长边对应的侧面相对设置，当需要设置多个第一光源、第二光源时，导光板长边对应的侧面空间较大，可以设置更多数量的光源，从而在共享态实现第一方向防窥的同时，还可以提高背光模组光源设置数量，提高背光模组亮度。
在一些实施例中，如图8所示，第一光源5与第二光源12分别位于第一 导光板1的两侧。
当然，在具体实施时，第一光源与第二光源也可以位于第一导光板的同一侧。
需要说明的是，图8中以第一光源、第二光源均与导光板长边对应的侧面相对设置为例进行说明。在具体实施时，当需要在共享态实现第一方向防窥的情况下，第一光源也可以与第一导光板短边对应的侧面相对设置，此种情况下，当第一防窥方向为第二方向X时，各导光板在第一方向Y上的宽度大于导光板在第二方向X上的宽度，第二光源仍在第二方向上与第二侧面相邻，每一第三棱镜结构沿第一方向Y延伸，第一光源在第一方向上与第一侧面相邻，第一棱镜结构的延伸方向与第三棱镜结构的延伸方向垂直，即每一第一棱镜结构沿第二方向延伸。
在具体实施时，当第一网点和第二网点的形状均为楔形时，楔形的具体形状可以相同也可以不相同。例如，图8中第一网点和第二网点的形状不相同。第一网点的截面的形状为直角三角形，而第二网点的截面的形状为非直角三角形。
在一些实施例中，在第一方向上第二网点的截面图形为等腰梯形；在第二方向上第二网点的截面图形为非直角、非等边三角形。
例如，第二网点的俯视图如图9所示，其中，图9中还示意出了第二网点14沿AA’的截面图形33以及沿BB’的截面图形34，沿AA’的截面图形33即为在第一方向上Y第二网点14的截面图形，沿BB’的截面图形34即为在第二方向X上第二网点14的截面图形，如图9所示，沿AA’的截面图形33为等腰梯形，沿BB’的截面图形34为非直角、非等边三角形。在具体实施时，第二网点14沿第一方向Y的最大宽度h3可以与第二网点14沿第二方向X的宽度h5相等，例如，h5＝h3＝50微米；沿AA’的截面图形33中d角度例如为60°，沿BB’的截面图形34中的b角度为60°、c角度为3°。
在一些实施例中，如图1、图4～图8所示，第一表面2包括多个连续排列的第四棱镜结构35。从而可以避免第一逆棱镜下表面与第一表面接触后划 伤第一表面。
相应的，当第二导光板的第三表面包括第二棱镜结构时，除了可以减少一层棱镜膜外，还可以避免第二逆棱镜下表面与第三表面接触后划伤第三表面。
在具体实施时，如图1、图4～图8所示，多个第四棱镜结构35沿第二方向X排列。
在具体实施时，第四棱镜结构的高度大于等于5微米且小于等于10微米；相邻第四棱镜结构的顶点之间的距离大于等于30微米且小于等于70微米。第四棱镜结构的高度可以与第二棱镜结构的高度相同，相邻第四棱镜结构的顶点之间的距离可以与相邻第二棱镜结构的顶点之间的距离相同。当然，也可以是第四棱镜结构的高度与第二棱镜结构的高度不相同，相邻第四棱镜结构的顶点之间的距离与相邻第二棱镜结构的顶点之间的距离不相同。
本公开实施例提供的一种显示装置，如图10所示，显示装置包括：
本公开实施例提供的上述背光模组32；
显示面板28，位于背光模组32的出光侧。
在具体实施时，如图10所示，显示面板28例如为液晶显示面板，包括：相对设置的阵列基板29和对向基板31，以及位于阵列基板29和对向基板31直接的第二液晶层30。阵列基板2包括：阵列排布的薄膜晶体管及像素电极。对向基板包括：彩色色阻以及黑矩阵，黑矩阵具有与显示面板子像素区对应的开口区，彩色色阻位于开口区内。阵列基板或对向基板还包括公共电极。
在具体实施时，本公开实施例提供的显示装置例如可以应用于车辆作为车载显示装置。
本公开实施例提供的显示装置为：手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。对于该显示装置的其它必不可少的组成部分均为本领域的普通技术人员应该理解具有的，在此不做赘述，也不应作为对本公开的限制。该显示装置的实施可以参见上述背光模组的实施例，重复之处不再赘述。
综上所述，本公开实施例提供的背光模组，第一逆棱镜位于第一导光板的出光面，从而可以聚合第一导光板出射光而形成准直出射光，第一防窥膜设置在第一逆棱镜背离第一导光板的一侧，准直光入射第一防窥膜后，第一防窥膜可以在第一防窥方向遮挡预设角度的光线，进一步收窄出射光的角度，以形成准直的出射光，当背光模组应用于显示产品时，显示产品可以在第一防窥方向上实现防窥，并且可以提高防窥效果。并且，由于第一逆棱镜可以聚合第一导光板出射，还可以提高垂直视角的出光亮度，减少由于设置第一防窥膜引起的出光亮度损失，避免增加背光模组的功耗。
尽管已描述了本发明的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然，本领域的技术人员可以对本发明实施例进行各种改动和变型而不脱离本发明实施例的精神和范围。这样，倘若本发明实施例的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (16)

  1. 一种背光模组，其中，所述背光模组包括：
    第一导光板，包括：相对的第一表面和第二表面，以及连接所述第一表面和所述第二表面的第一侧面；所述第二表面包括多个阵列排布的第一网点；
    至少一个第一光源，与所述第一侧面相邻；
    第一逆棱镜，位于所述第一表面背离所述第二表面的一侧；
    第一防窥膜，位于所述第一逆棱镜背离所述第一导光板的一侧；所述第一防窥膜具有第一防窥方向，所述第一防窥膜用于：对于准直入射光在所述第一防窥方向遮挡预设角度的光线；
    第二导光板，位于所述第一防窥膜背离所述第一逆棱镜一侧，包括：相对的第三表面和第四表面，以及连接所述第三表面和所述第四表面的第二侧面；所述第三表面位于所述第四表面背离所述第一防窥膜的一侧；所述第四表面包括多个阵列排布的第二网点；
    至少一个第二光源，与所述第二侧面相邻。
  2. 根据权利要求1所述的背光模组，其中，还包括：
    视角控制模组，位于所述第二导光板背离所述第一防窥膜一侧；
    第一驱动电路，与所述视角控制模组电连接，用于：向所述视角控制模组提供电信号，以使光线经过所述视角控制模组出射后的传播方向发生改变。
  3. 根据权利要求2所述的背光模组，其中，所述视角控制模组包括：叠层设置的第一导电层、第一液晶层、第二导电层。
  4. 根据权利要求1～3任一项所述的背光模组，其中，所述第三表面包括多个连续排列棱镜结构。
  5. 根据权利要求1～4任一项所述的背光模组，其中，还包括：
    半透半反膜，位于所述第一防窥膜与所述第二导光板之间。
  6. 根据权利要求5所述的背光模组，其中，所述半透半反膜为偏光膜。
  7. 根据权利要求1～6任一项所述的背光模组，其中，还包括：位于所 述第二导光板背离所述第一防窥膜一侧的第二防窥膜；所述第二防窥膜具有第二防窥方向，所述第二防窥方向与所述第一防窥方向交叉。
  8. 根据权利要求7所述的背光模组，其中，所述多个第二网点沿第一方向、第二方向阵列排布；所述第一方向与所述第二方向交叉；
    所述第二网点的形状为圆形或椭圆形。
  9. 根据权利要求8所述的背光模组，其中，所述第二导光板在所述第一方向上的宽度大于所述第二导光板在所述第二方向上的宽度；所述至少一个第二光源在所述第二方向上与所述第二侧面相邻。
  10. 根据权利要求1～6任一项所述的背光模组，其中，所述多个第二网点沿第一方向、第二方向阵列排布；所述第一方向与所述第二方向交叉；
    所述第二网点的形状为楔形；
    所述背光模组还包括：位于所述第二导光板背离所述第一防窥膜一侧的第二逆棱镜。
  11. 根据权利要求10所述的背光模组，其中，所述第一防窥方向为所述第二方向；
    所述第二导光板在所述第一方向上的宽度大于所述第二导光板在所述第二方向上的宽度；
    所述至少一个第二光源在所述第二方向上与所述第二侧面相邻。
  12. 根据权利要求11所述的背光模组，其中，在所述第一方向上所述第二网点的截面图形为等腰梯形；在所述第二方向上所述第二网点的截面图形为非直角、非等边三角形。
  13. 根据权利要求1～12任一项所述的背光模组，其中，所述第一网点的形状为楔形。
  14. 根据权利要求13所述的背光模组，其中，所述第一光源与所述第二光源位于所述第一导光板的同一侧，或者，所述第一光源与所述第二光源分别位于所述第一导光板的两侧。
  15. 根据权利要求1～14任一项所述的背光模组，其中，还包括：
    反射片，位于所述第二表面背离所述第一表面的一侧。
  16. 一种显示装置，其中，所述显示装置包括：
    根据权利要求1～15任一项所述的背光模组；
    显示面板，位于所述背光模组的出光侧。
PCT/CN2022/083143 2022-03-25 2022-03-25 背光模组及显示装置 WO2023178674A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202280000551.0A CN117501171A (zh) 2022-03-25 2022-03-25 背光模组及显示装置
PCT/CN2022/083143 WO2023178674A1 (zh) 2022-03-25 2022-03-25 背光模组及显示装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2022/083143 WO2023178674A1 (zh) 2022-03-25 2022-03-25 背光模组及显示装置

Publications (1)

Publication Number Publication Date
WO2023178674A1 true WO2023178674A1 (zh) 2023-09-28

Family

ID=88099604

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/083143 WO2023178674A1 (zh) 2022-03-25 2022-03-25 背光模组及显示装置

Country Status (2)

Country Link
CN (1) CN117501171A (zh)
WO (1) WO2023178674A1 (zh)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206057756U (zh) * 2016-09-22 2017-03-29 上海天马微电子有限公司 显示屏及显示装置
WO2017065745A1 (en) * 2015-10-13 2017-04-20 Hewlett-Packard Development Company, L.P. Privacy backlight module
CN209433052U (zh) * 2019-02-25 2019-09-24 昆山龙腾光电有限公司 一种导光板、背光模组及显示装置
CN111856819A (zh) * 2020-08-27 2020-10-30 京东方科技集团股份有限公司 背光模组、显示模组及其指纹识别方法、显示装置
CN112835216A (zh) * 2021-03-03 2021-05-25 武汉华星光电技术有限公司 背光模组及显示面板
CN215340417U (zh) * 2021-07-12 2021-12-28 博讯光电科技(合肥)有限公司 一种防窥背光源结构及介质

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017065745A1 (en) * 2015-10-13 2017-04-20 Hewlett-Packard Development Company, L.P. Privacy backlight module
CN206057756U (zh) * 2016-09-22 2017-03-29 上海天马微电子有限公司 显示屏及显示装置
CN209433052U (zh) * 2019-02-25 2019-09-24 昆山龙腾光电有限公司 一种导光板、背光模组及显示装置
CN111856819A (zh) * 2020-08-27 2020-10-30 京东方科技集团股份有限公司 背光模组、显示模组及其指纹识别方法、显示装置
CN112835216A (zh) * 2021-03-03 2021-05-25 武汉华星光电技术有限公司 背光模组及显示面板
CN215340417U (zh) * 2021-07-12 2021-12-28 博讯光电科技(合肥)有限公司 一种防窥背光源结构及介质

Also Published As

Publication number Publication date
CN117501171A (zh) 2024-02-02

Similar Documents

Publication Publication Date Title
JP3617458B2 (ja) 表示装置用基板、液晶装置及び電子機器
JP4133088B2 (ja) 液晶表示装置
CN101183193B (zh) 电光装置、照明装置及电子设备
US7423713B2 (en) Liquid crystal device and electronic equipment
JP4155276B2 (ja) 液晶装置及び電子機器
JP4923921B2 (ja) 液晶装置及び電子機器
US10663798B2 (en) Liquid crystal display panel comprising a liquid crystal prism and a reflective prism disposed between first and second substrates and driving method thereof, and display device
WO2021239050A1 (zh) 显示组件和显示装置
CN108398828B (zh) 液晶显示面板、显示装置及其工作方法
WO2007129420A1 (ja) 表示装置
US10969634B2 (en) Liquid crystal display panel, liquid crystal display device and method of controlling gray scale of liquid crystal display device
JP3959973B2 (ja) 液晶装置及び電子機器
KR100459647B1 (ko) 디스플레이장치
CN111290069B (zh) 液晶显示装置
US6927831B2 (en) Liquid crystal device and electronic apparatus having a substantially uniform substrate interval
WO2023178674A1 (zh) 背光模组及显示装置
CN113641016B (zh) 显示装置
JP4731043B2 (ja) 液晶表示装置
JP2004258365A (ja) 電気光学装置、およびそれを用いた電子機器
JP2006201215A (ja) 電気光学装置、電気光学装置の製造方法、電子機器
JP3377474B2 (ja) 光学素子および該光学素子を用いた表示装置
JP2006140078A (ja) 照明装置、電気光学装置及び電子機器
JP2001305996A (ja) 表示装置用基板及びその製造方法、並びに液晶装置及び電子機器
CN109870861B (zh) 一种液晶显示面板及显示装置
US8742416B2 (en) Display panel, method of manufacturing display panel, display device, and electronic apparatus

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 202280000551.0

Country of ref document: CN

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

Ref document number: 22932735

Country of ref document: EP

Kind code of ref document: A1