WO2021238906A1 - Structure de rétroéclairage et module d'affichage lcd - Google Patents

Structure de rétroéclairage et module d'affichage lcd Download PDF

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Publication number
WO2021238906A1
WO2021238906A1 PCT/CN2021/095754 CN2021095754W WO2021238906A1 WO 2021238906 A1 WO2021238906 A1 WO 2021238906A1 CN 2021095754 W CN2021095754 W CN 2021095754W WO 2021238906 A1 WO2021238906 A1 WO 2021238906A1
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WO
WIPO (PCT)
Prior art keywords
prism sheet
substrate
light
backlight structure
guide plate
Prior art date
Application number
PCT/CN2021/095754
Other languages
English (en)
Chinese (zh)
Inventor
王秋里
陈雷
汪志强
马鑫
孙川
姚建峰
王新宇
谭丁炀
Original Assignee
京东方科技集团股份有限公司
北京京东方光电科技有限公司
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Application filed by 京东方科技集团股份有限公司, 北京京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Publication of WO2021238906A1 publication Critical patent/WO2021238906A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Definitions

  • the present disclosure relates to the technical field of LCD display modules, and in particular to a backlight structure and LCD display modules.
  • the directional backlight has the advantages of light output brightness, viewing angle, and forward light brightness. In recent years, it has been used in vehicle high-brightness displays, notebook privacy displays, and VR (Virtual Reality, virtual reality technology) high-brightness. Display and other aspects are more and more used. Inverse prisms and matching LGP (light guide plates) are the most commonly used directional backlight solutions. Haze is often introduced to homogenize the light and play a role in shielding film surface defects and defects.
  • the haze layer is close to the eye-entry side, and the haze layer is a micron or sub-micron uneven layer to achieve the overall divergence of light at a certain angle, thereby homogenizing the light and reducing
  • the visibility of surface defects such as prism sheet and LGP improves the picture quality.
  • this directional backlight is applied to an optical visual system (such as VR) with optical magnification, the light diverges from the topography of the haze layer and is magnified, but because it is close to the side of the human eye, the light intensity of the picture becomes higher. Close to the surface morphology of the haze layer, the image quality is very grainy.
  • the present disclosure aims to solve at least one of the technical problems existing in the prior art. For this reason, the present disclosure proposes a backlight structure, which can effectively improve the graininess of the haze layer after being amplified by the optical system.
  • the present disclosure also provides an LCD display module, which includes the above-mentioned backlight structure.
  • the backlight structure includes: a light guide plate; a light source provided on the side of the light guide plate; a first prism sheet, the first prism sheet and the light guide plate are stacked and spaced apart,
  • the first prism sheet includes a first substrate and a plurality of first protrusions, the plurality of first protrusions are provided on a side of the first substrate away from the light guide plate, and each of the first protrusions is The length direction of the side wall of the light guide plate extends, the arrangement direction of the plurality of first protrusions is perpendicular to the extending direction of each of the first protrusions; the second prism sheet, the second prism sheet and The first prism sheets are stacked and spaced apart, the second prism sheet is located on a side of the first prism sheet away from the light guide plate, and the second prism sheet includes a second substrate and a plurality of second substrates.
  • a plurality of the second protrusions are provided on a side of the second substrate away from the first prism sheet, each of the second protrusions extends in the same direction as the first protrusions,
  • the arrangement direction of the plurality of second protrusions is the same as the arrangement direction of the plurality of first protrusions, and a haze layer is provided on the surface of the second substrate close to the first prism sheet.
  • the haze layer by arranging the haze layer on the side of the second prism sheet close to the first prism sheet, the haze layer can be positioned on the side of the second prism sheet away from the human eye, thereby making The degree of light dispersion after passing through the haze layer is better, which can effectively improve the graininess of the haze layer after being magnified by the optical system and improve the picture quality.
  • the second protrusions on the second prism sheet are located on the side of the second substrate away from the first prism sheet, which facilitates the setting of the haze layer, and the provision of two prism sheets, the first prism sheet and the second prism sheet, can make light
  • the final injection angle meets the demand, and the structure is simple.
  • the light source includes a plurality of light sources arranged at intervals along the length direction of the side wall of the light guide plate.
  • the thickness of the first substrate is d1
  • the thickness of the second substrate is d2
  • d1 ⁇ 65 ⁇ m the thickness of the second substrate is d2
  • d2 ⁇ 65 ⁇ m the thickness of the first substrate is d1
  • d1 ⁇ 65 ⁇ m the thickness of the second substrate is d2
  • d1+d2 ⁇ 250 ⁇ m In some embodiments of the present disclosure, d1+d2 ⁇ 250 ⁇ m.
  • the cross section of the first protrusion is triangular, and there is one side on the surface of the first substrate away from the light guide plate, and the cross section of the second protrusion is It is triangular, and one side is located on the surface of the second substrate away from the first prism sheet.
  • the first protrusion includes a first surface close to the light source and a second surface away from the light source
  • the second protrusion includes a third surface close to the light source and The fourth surface away from the light source, after the light emitted from the light guide plate enters the first prism sheet, it exits from the second surface and enters the second prism sheet, and then from the fourth surface
  • the angle between the first surface and the first substrate is ⁇
  • the angle between the second surface and the first substrate is ⁇
  • the angle between the third surface and the second substrate is ⁇ 1
  • the angle between the third surface and the second substrate is ⁇ 2
  • the incident angle of the light entering the first prism sheet is ⁇ 2
  • the corresponding refraction angle is ⁇ 3
  • the light emitted from the first prism sheet is emitted
  • the first setting value is 24 ⁇ m.
  • the second setting value is 16-18 ⁇ m.
  • the ⁇ is 90° ⁇ 3.
  • the ⁇ 1 is 90° ⁇ 7.
  • the haze of the haze layer is 20%-40%.
  • the light source is an LED lamp.
  • the LCD display module according to the embodiment of the present disclosure includes the above-mentioned backlight structure.
  • the haze layer by arranging the haze layer on the side of the second prism sheet close to the first prism sheet, the haze layer can be positioned on the side of the second prism sheet away from the human eye. Therefore, the degree of dispersion of light after passing through the haze layer is better, and the graininess phenomenon of the haze layer after being magnified by the optical system can be effectively improved, and the picture quality is improved.
  • the second protrusions on the second prism sheet are located on the side of the second substrate away from the first prism sheet, which facilitates the setting of the haze layer, and the provision of two prism sheets, the first prism sheet and the second prism sheet, can make light
  • the final injection angle meets the demand, and the structure is simple.
  • Fig. 1 is a perspective view of a backlight structure according to an embodiment of the present disclosure
  • Figure 2 is a front view of a backlight structure according to an embodiment of the present disclosure
  • FIG. 3 is a partial structural diagram of a first prism sheet of a backlight structure according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of a partial structure of a second prism sheet of a backlight structure according to an embodiment of the present disclosure
  • FIG. 5 is a front view of a backlight structure and a schematic diagram of light paths according to an embodiment of the present disclosure
  • Fig. 6 is a front view and a multi-path light path diagram of a backlight structure according to an embodiment of the present disclosure.
  • Fig. 7 is a schematic diagram of light emitted from a light guide plate of a backlight structure according to an embodiment of the present disclosure
  • FIG. 8 is a schematic diagram of light emitted by the first prism sheet of the backlight structure according to an embodiment of the present disclosure
  • FIG. 9 is a schematic diagram of light emitted from a second prism sheet of a backlight structure according to an embodiment of the present disclosure.
  • the first prism sheet 3 the first substrate 31, the first protrusions 32, the first surface 321, the second surface 322, the first ridge line 323,
  • the second prism sheet 4 the second substrate 41, the second protrusion 42, the third surface 421, the fourth surface 422, the second ridge line 423,
  • the backlight structure 100 includes a light guide plate 1, a light source 2, a first prism sheet 3 and a second prism sheet 4.
  • the light source 2 is provided on the side of the light guide plate 1 and arranged along the length direction of the corresponding side wall of the light guide plate 1. Under the action of the light guide plate 1, light is uniformly emitted from the front surface of the light guide plate 1, as shown in FIG. 1.
  • the first prism sheet 3 and the light guide plate 1 are stacked and spaced apart.
  • the first prism sheet 3 includes a first substrate 31 and a plurality of first protrusions 32.
  • the plurality of first protrusions 32 are provided on the first substrate 31 away from the guide plate.
  • each first protrusion 32 extends along the length direction of the side wall of the light guide plate, as shown in FIG.
  • the extension direction of the first protrusions 32 is vertical, and the first prism sheet 3 can deflect the light emitted from the light guide plate 1 to a certain angle in a direction perpendicular to the light guide plate 1.
  • the second prism sheet 4 and the first prism sheet 3 are stacked and spaced apart.
  • the second prism sheet 4 is located on the side of the first prism sheet 3 away from the light guide plate 1.
  • the second prism sheet 4 includes a second substrate 41 and a plurality of The second protrusion 42, a plurality of second protrusions 42 are provided on the side of the second substrate 41 away from the first prism sheet 3, and the extension direction of each second protrusion 42 is the same as that of the first protrusion 32.
  • the arrangement direction of the second protrusions 42 is the same as the arrangement direction of the plurality of first protrusions 32, and the second prism sheet 4 can deflect the light emitted from the first prism sheet 3 according to the required light direction.
  • a haze layer 5 is provided on the surface of the second substrate 41 close to the first prism sheet 3, so that the haze layer 5 can be located on the side of the second prism sheet 4 far away from the human eye.
  • the haze layer 5 is located near the eye, and the light diverges less on the fixed receiving surface. This can prevent the conventional inverse prism haze layer from causing insufficient light homogenization on the near-eye side, and the light is close to its own contour after passing through the magnification system, which causes the phenomenon of coarse particles of image quality.
  • the haze layer 5 is far away from the side of human eyes, and the degree of dispersion of light after passing through the haze layer 5 is a better homogenization effect.
  • the light guide plate 1, the first substrate 31 and the second substrate 32 may be arranged in parallel.
  • the haze layer 5 can be located on the second prism sheet 4 away from human eyes. Therefore, the light is dispersed better after passing through the haze layer 5, which can effectively improve the graininess of the haze layer 5 after being magnified by the optical system, and improve the picture quality.
  • the second protrusions 42 on the second prism sheet 4 are located on the side of the second substrate 41 away from the first prism sheet 3, which facilitates the arrangement of the haze layer 5, and the arrangement of the first prism sheet 3 and the second prism sheet 4Two prism sheets can make the final emission angle of light meet the demand, and the structure is simple.
  • a plurality of light sources 2 are arranged on the left side of the light guide plate 1 and arranged at intervals along the length direction of the left side wall of the light guide plate 1 (the front-rear direction as shown in FIG. 1). .
  • the light from the multiple light sources 2 enters the light guide plate 1 from the corresponding side walls of the light guide plate 1.
  • the thickness of the first substrate 31 is d1
  • the thickness of the second substrate 41 is d2, d1 ⁇ 65 ⁇ m, and d2 ⁇ 65 ⁇ m. In this way, the light can be better deflected, and the requirement of the light exit angle of the backlight structure 100 can be met.
  • d1+d2 ⁇ 250 ⁇ m In the related technology, the LCD for VR, 1000ppi is the mainstream resolution level, and the thickness of the inverse prism substrate is generally 250um to prevent the moiré visible under a 10x magnifying glass.
  • making d1+d2 ⁇ 250 ⁇ m can make the thickness and macroscopic size of the backlight structure 100 of the present application smaller than that of the prior art backlight structure, and avoid the increase in the size of the device using the backlight structure 100.
  • the present disclosure is not limited to this.
  • the thickness of the first substrate 31 and the thickness of the second substrate 41 may also be different. For example, the thickness of the first substrate 31 is greater than the thickness of the second substrate 41, or the thickness of the first substrate 31 is smaller than that of the second substrate. The thickness of the substrate 41.
  • the cross section of the first protrusion 32 is triangular, and there is one side on the surface of the first substrate 31 away from the light guide plate 1, and the second protrusion 32
  • the cross section of the ridge 42 is triangular, and one side is located on the surface of the second substrate 41 away from the first prism sheet 3. Therefore, it is convenient for the light to be emitted through the surfaces of the first protrusion 32 and the second protrusion 42 and be deflected, thereby meeting the requirements of the light emitting angle of the backlight structure 100.
  • the first protrusion 32 includes a first surface 321 close to the light source 2 and a second surface 322 away from the light source 2, and the second protrusion 42 includes a third surface 421 close to the light source 2.
  • the fourth surface 422 far away from the light source 2 after the light emitted from the light guide plate 1 enters the first prism sheet 3, it exits from the second surface 322 and enters the second prism sheet 4, and then exits from the fourth surface 422.
  • the angle of the plate 31 is ⁇
  • the angle of the second surface 322 and the first substrate 31 is ⁇
  • the angle of the third surface 421 and the second substrate 41 is ⁇ 1
  • the third surface 421 and the The angle of the second substrate 41 is ⁇ 2
  • the incident angle of the light entering the first prism sheet 3 is ⁇ 2
  • the corresponding refraction angle is ⁇ 3
  • the exit angle of the light emitted from the first prism sheet 3 is ⁇ 4
  • the corresponding refraction angle is ⁇ 5
  • the incident angle of the light entering the second prism sheet 4 is ⁇ 6, the corresponding refraction angle is ⁇ 7
  • the exit angle of the light emitted from the second prism sheet 4 is ⁇ 8, and the corresponding refraction angle is ⁇ 9
  • n is the refractive index of the prism material
  • ⁇ 1 and ⁇ are set angles
  • the ridgeline between the first surface 321 and the second surface 322 is the first ridgeline 323
  • the third surface 421 and the fourth surface 422 are between
  • the ridgeline of is the second ridgeline 423
  • the distance between two adjacent first ridgelines 323 is the first set value
  • the distance between two adjacent second ridgelines 423 is the second set value Value
  • the height of the first ridgeline 323 from the first substrate 31 is the first set height value
  • the height of the second ridgeline 423 from the second substrate 41 is the second set height value.
  • the final exit angle of the light is ⁇ 9.
  • ⁇ 2 can be determined, and ⁇ can be obtained through the first setting value, the first setting height value, ⁇ and the above (1)-(7), so that the first convexity can be set reasonably.
  • ⁇ can be 90° ⁇ 3. It is understandable that ⁇ can vary between 90° and ⁇ 3, and 90 can be selected. An angle value between ° and ⁇ 3. This can better ensure that the light output angle meets the demand.
  • ⁇ 2 can be obtained according to the second setting value, the second setting height value, ⁇ 1, ⁇ , and the above (1)-(7), so that the second protrusion 42 can be reasonably set to meet the light output angle of the backlight structure 100 Require.
  • ⁇ 1 can be 90° ⁇ 7. It is understandable that ⁇ 1 can be changed between 90° and ⁇ 7, and 90 can be selected. An angle value between ° and ⁇ 7. This can better ensure that the light output angle meets the demand.
  • the first set value is 24 ⁇ m.
  • the second setting value is 16 to 18 ⁇ m. This can avoid the moiré phenomenon.
  • the second set value can be 16.5 ⁇ m, 17 ⁇ m, 17.5 ⁇ m, or the like.
  • the haze of the haze layer 5 is 20%-40%.
  • the uniformity of the light dispersion after passing through the haze layer 5 can be improved, and the picture quality can be improved.
  • the light source 2 is an LED lamp.
  • the LED lamp has the advantages of energy saving, long life, can work in a high-speed state, good shock resistance, etc., so that the life span and working reliability of the backlight structure 100 can be improved.
  • Figure 7 is the tracking result after the light passes through the light guide plate 1;
  • Figure 8 is the light exit result after the light passes through the first prism sheet 3, the light emitted from the light guide plate 1 is deflected by a certain angle in the direction perpendicular to the light guide plate 1;
  • 9 is the light output result after the light passes through the second prism sheet 4, and the light exits substantially perpendicular to the light guide plate 1.
  • the LCD display module includes the above-mentioned backlight structure 100 and the LCD display screen, the LCD display screen and the backlight structure 100 are stacked, and the LCD display screen is located on the side of the second prism sheet 4 away from the first prism sheet 3 ,
  • the backlight structure 100 can provide a light source for the LCD display screen.
  • the haze layer 5 can be located on the side of the second prism sheet 4 away from people.
  • One side of the eye so that the light is dispersed better after passing through the haze layer 5, which can effectively improve the graininess of the haze layer 5 after being magnified by the optical system, and improve the picture quality.
  • the second protrusions 42 on the second prism sheet 4 are located on the side of the second substrate 41 away from the first prism sheet 3, which facilitates the arrangement of the haze layer 5, and the arrangement of the first prism sheet 3 and the second prism sheet 4Two prism sheets can make the final emission angle of light meet the demand, and the structure is simple.
  • connection should be understood in a broad sense. For example, they can be fixed or detachable. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • connection should be understood in a broad sense. For example, they can be fixed or detachable. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • connection can be fixed or detachable. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Planar Illumination Modules (AREA)

Abstract

L'invention concerne une structure de rétroéclairage (100) et un module d'affichage à cristaux liquides, la structure de rétroéclairage (100) comprenant : une plaque de guidage de lumière (1) ; une pluralité de sources de lumière (2) ; un premier élément de prisme (3), le premier élément de prisme (3) et la plaque de guidage de lumière (1) étant empilés et espacés l'un de l'autre, et le premier élément de prisme (3) comprenant un premier substrat (31) et une pluralité de premières parties saillantes (32) ; et un second élément de prisme (4), le second élément de prisme (4) et le premier élément de prisme (3) étant empilés et espacés l'un de l'autre, le second élément de prisme (4) étant situé d'un côté du premier élément de prisme (3) éloigné de la plaque de guidage de lumière (1), le second élément de prisme (4) comprenant un second substrat (41) et une pluralité de secondes parties saillantes (42), et une surface du second substrat (41) à proximité du premier élément de prisme (3) étant pourvue d'une couche de voile (5). Par conséquent, la couche de voile (5) peut être située d'un côté du second élément de prisme (4) éloigné de l'œil humain. Par comparaison avec ce que l'on observerait si la couche de voile (5) était située du côté le plus proche de l'œil, le degré de divergence de la lumière est moindre sur une surface de réception fixe, et l'on évite une homogénéisation insuffisante de la lumière provoquée par une couche de voile de prisme inverse classique du côté le plus proche de l'œil, ainsi qu'à la sortie d'un système d'agrandissement, la lumière étant proche du contour de celui-ci, à l'origine d'une qualité d'image insuffisante.
PCT/CN2021/095754 2020-05-27 2021-05-25 Structure de rétroéclairage et module d'affichage lcd WO2021238906A1 (fr)

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CN202010460358.8 2020-05-27
CN202010460358.8A CN111474624A (zh) 2020-05-27 2020-05-27 背光结构及lcd显示模组

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CN111474624A (zh) * 2020-05-27 2020-07-31 京东方科技集团股份有限公司 背光结构及lcd显示模组
CN113370888B (zh) * 2021-06-08 2023-10-20 福耀玻璃工业集团股份有限公司 车窗组件及车辆
TWI805464B (zh) * 2022-04-28 2023-06-11 瑞儀光電股份有限公司 背光模組及顯示裝置

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