CN115171542A - LED panel and spliced display panel - Google Patents

LED panel and spliced display panel Download PDF

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Publication number
CN115171542A
CN115171542A CN202210678790.3A CN202210678790A CN115171542A CN 115171542 A CN115171542 A CN 115171542A CN 202210678790 A CN202210678790 A CN 202210678790A CN 115171542 A CN115171542 A CN 115171542A
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China
Prior art keywords
led
grating
panel
grating structure
light guide
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Granted
Application number
CN202210678790.3A
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Chinese (zh)
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CN115171542B (en
Inventor
孙荷静
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TCL China Star Optoelectronics Technology Co Ltd
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TCL China Star Optoelectronics Technology Co Ltd
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Priority to CN202210678790.3A priority Critical patent/CN115171542B/en
Publication of CN115171542A publication Critical patent/CN115171542A/en
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/302—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements characterised by the form or geometrical disposition of the individual elements
    • G09F9/3026—Video wall, i.e. stackable semiconductor matrix display modules
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1814—Diffraction gratings structurally combined with one or more further optical elements, e.g. lenses, mirrors, prisms or other diffraction gratings
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/35—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being liquid crystals

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Multimedia (AREA)
  • Planar Illumination Modules (AREA)

Abstract

The application discloses LED panel and concatenation display panel establishes the grating structure in the week side of LED device is enclosed, and the height that highly is greater than the LED device of grating structure, and the grating structure is used for seeing through and/or reflects the partial light that the LED device sent. The LED light source adopts the grating structure to transmit and/or reflect part of light rays emitted by the LED device. The light of the great visual angle that the LED device sent sees through the grating structure and/or is reflected by the grating structure, and then compensates the luminance of LED device side view visual angle, improves the phenomenon that LED display panel luminance suddenly drops along with the visual angle change for LED panel side view angle luminance presents the decline of gradual change formula.

Description

LED panel and spliced display panel
Technical Field
The application belongs to the display field, and particularly relates to an LED panel and a spliced display panel.
Background
At present, in the display field, in order to form an LED panel with a low viewing angle for peeping prevention, a grating structure is generally arranged on the LED panel to shield light rays on the side surface of the LED panel. However, due to the fact that the grating structure shields light on the side face of the LED panel, a phenomenon of sudden brightness drop occurs when the front view angle of the LED display screen is changed to a side view angle, namely, the display screen suddenly drops from normal brightness to a black state after a certain angle, and poor watching experience is brought to a viewer.
Therefore, the LED panel needs to achieve both good peep-proof function and good display experience, and it is urgently needed to optimize the problem that the brightness of the LED display panel suddenly changes along with the change of the viewing angle.
Disclosure of Invention
An object of the present application is to provide an LED panel, which improves the technical problem of abrupt brightness drop of an LED display panel along with the change of the viewing angle, so that the brightness of the LED panel gradually drops along with the change of the viewing angle.
In order to solve the above technical problem, the present application provides an LED panel, including:
a drive substrate;
a plurality of LED devices arranged on the driving substrate at intervals;
and the grating structure is arranged around the periphery of the LED device. The height of the grating structure is greater than the height of the LED device. The grating structure is used for transmitting and/or reflecting part of light emitted during the LED.
In some embodiments, the grating structure includes a grating body and a light guide disposed within the grating body. Between two adjacent LED devices, the light guide body runs through the grating main body.
In some embodiments, a first reflective layer is disposed between the light guide and the grating body.
In some embodiments, the grating body includes a first portion and a second portion disposed on the first portion, the light guide disposed within the second portion; the first portion is for blocking light.
Optionally, a side of the first portion facing the LED device is provided with a second reflective layer.
Optionally, the thickness of the first portion is less than the thickness of the second portion.
In some embodiments, the density of the light guide body increases from a side of the grating structure closer to the driving substrate to a side farther from the driving substrate.
Preferably, the length of the light guide is equal to the width of the grating body.
In some embodiments, the grating structure comprises a grating body and a reflective layer disposed on a side of the grating body facing the LED device.
The application also provides a spliced display panel, including two at least liquid crystal display panels, the liquid crystal display panel concatenation sets up and is formed with the gap. The LED panel is arranged on the light emergent side or the light incident side of the two adjacent liquid crystal panels and shields the gap.
The LED panel that this application embodiment provided encloses on the week side of LED device and establishes the grating structure, and the height that highly is greater than the LED device of grating structure, the grating structure is used for seeing through and/or reflection the partial light that the LED device sent.
The embodiment of the application adopts the grating structure to transmit and/or reflect part of light emitted by the LED device. The light rays with larger visual angles emitted by the LED device penetrate through the grating structure and/or are reflected by the grating structure, so that the brightness of the side viewing angles of the LED device is compensated, the phenomenon that the brightness of the LED display panel suddenly drops along with the change of the visual angles is improved, and the brightness of the side viewing angles of the LED panel gradually drops.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, it is obvious that the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic top view of an LED panel according to an embodiment of the present disclosure;
fig. 2 is a schematic cross-sectional structure view of an LED panel along the S-S direction according to an embodiment of the present disclosure;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a schematic cross-sectional view of an LED panel along the S-S direction according to another embodiment of the present application;
fig. 5 is a schematic structural diagram of a tiled display panel provided in the embodiment of the present application.
Reference numerals: 100-an LED panel; 10-a drive substrate; 20-an LED device; 30-a grating structure; 31-a grating body; 31 a-first portion; 31 b-a second portion; 32-a light guide; 33-a first reflective layer; 34-a second reflective layer; an fs-reflective layer; 200-a liquid crystal panel; 300-a gap; 1000-tiled display panel; a-details of the grating structure.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that in the description of the present application, it is to be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", and the like are based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific direction, be configured and operated in a specific direction, and thus, cannot be construed as limiting the present application.
Referring to fig. 1 and 2, an LED panel 100 includes a driving substrate 10, a plurality of LED devices 20, and a grating structure 30. The LED devices 20 are arranged on the driving substrate 10 at intervals, the grating structure 30 is arranged around the LED devices 20, and the height of the grating structure 30 is greater than that of the LED devices 20; the grating structure 30 is used to transmit and/or reflect part of the light emitted by the LED device 20.
The present embodiment uses a grating structure 30 to transmit and/or reflect a portion of the light emitted from the LED device 20. The light with a large viewing angle emitted by the LED device 20 passes through the grating structure 30 and/or is reflected by the grating structure 30, so as to compensate the brightness of the side viewing angle of the LED device 20, and improve the brightness dip phenomenon of the LED display panel along with the viewing angle change, so that the brightness of the side viewing angle of the LED panel 100 is gradually decreased.
In an embodiment, a plurality of LED devices 20 are disposed on the driving substrate 10 at intervals, as shown in fig. 1, the LED devices 20 are arranged in an array, and the LED devices 20 are used for emitting light.
Referring to fig. 3, in the embodiment of the present application, the grating structure 30 includes a grating main body 31 and a light guide 32. The light guide 32 is disposed inside the grating body 31. Between two adjacent LED devices 20, the light guide 32 penetrates the grating main body 31.
Alternatively, the grating body 31 is made of a material that can be photo-cured and has a certain light absorption property, for example, but not limited to, a resin material doped with black molecules, wherein the light absorption property of the resin material can be adjusted by changing the doping ratio of the black molecules. The light guide 32 is a transparent light guide 32. Since the light guide body 32 is transparent and the light guide body 32 penetrates through the grating main body 31 between two adjacent LED devices 20, the light guide body 32 forms a transparent light guide channel on the grating main body 31, and light emitted from the LED devices 20 is irradiated to the light guide body 32 in the grating main body 31 and is transmitted through the light guide channel formed by the light guide body 32, so that the side view angle of the LED panel 100 has brightness and does not present a full black state.
Optionally, a first reflective layer 33 may also be disposed between the light guide body 32 and the grating body 31.
That is, the first reflective layer 33 is provided between the light guide channel formed by the light guide body 32 and the grating body 31. Due to the existence of the first reflection layer 33, the light emitted by the LED device 20 is emitted into the light guide body 32, is emitted into the adjacent LED device 20 region from the light guide body 32 through multiple reflections of the first reflection layer 33 between the light guide body 32 and the grating main body 31, and is finally emitted out through the adjacent LED device 20 region, so that the utilization rate of the light is improved, and the side-view brightness of the LED panel 100 is improved.
In the present embodiment, the grating body 31 includes a first portion 31a and a second portion 31b provided on the first portion 31 a. The light guide 32 is disposed in the second portion 31b. The first portion 31a is for blocking light.
Due to the light shielding effect of the first portion 31a, light emitted from the LED device 20 at a large viewing angle is irradiated onto the first portion 31a of the grating body 31 to be absorbed and shielded by the first portion 31 a. The light with a small viewing angle is irradiated to the light guide 32 of the second portion 31b, and is transmitted through the light guide 32.
Optionally, the present application is provided with a second reflective layer 34 on the side of the first portion 31a facing the LED device 20. Due to the existence of the second reflective layer 34, the light emitted by the LED device 20 is reflected by the second reflective layer 34 and reused, thereby reducing light loss and improving the screen brightness of the LED panel 100.
Optionally, the thickness of the first portion 31a is smaller than the thickness of the second portion 31b. The thickness of the first portion 31a is smaller than that of the second portion 31b, so that the invisible area is smaller, the side viewing angle area is larger, and the brightness of the side viewing angle is improved.
Alternatively, in the LED panel 100, the density of the light guide bodies 32 increases from the side of the grating structure 30 close to the driving substrate 10 to the side far from the driving substrate 10.
It can be understood that the transmittance of the light rays of the LED device 20 passing through the grating structure 30 increases from the side close to the driving substrate 10 to the side away from the driving substrate 10, so that the display brightness of the side view angle area is greater as the side view angle area is closer to the front view angle area, and the side view brightness of the LED panel 100 decreases gradually.
Alternatively, the length of the light guide body 32 is equal to the width of the grating body 31.
It is understood that when the length of the light guide body 32 is smaller than the width of the grating body 31, the light guide body 32 cannot penetrate the grating body 31, and the light emitted from the led device 20 cannot be transmitted through the light guide body 32. The length of the light guide body 32 is equal to the width of the grating main body 31, so that between two adjacent LED devices 20, the light guide body 32 can just penetrate through the grating main body 31, and the light emitted by the LED devices 20 can be transmitted through the light guide body 32.
It is understood that the length of the light guide body 32 may be greater than the width of the grating body 31, and when the length of the light guide body 32 is greater than the width of the grating body 31, the light guide body 32 may penetrate the grating body 31.
The embodiment of the present application further provides a method for manufacturing the LED panel 100, and the method for manufacturing the LED panel 100 is described in detail below.
S101 provides a driving substrate 10.
S102 forms the grating structure 30 on the driving substrate 10. A groove mold is formed on the driving substrate 10, and a grating material is filled in the groove mold and cured to form the grating structure 30.
The slot die is made of photoresist materials through exposure and development. The grating material is made of a material that can be formed by light curing and has a certain light absorption property, for example, a resin material doped with black molecules, but is not limited thereto, wherein the light absorption property of the resin material can be adjusted by changing the doping ratio of the black molecules. Further, the transparent light guide 32 is mixed with the grating material, the density of the light guide 32 can be adjusted by the ratio of the light guide 32 to the resin material, and the grating material mixed with the light guide 32 is filled into the groove die together for curing molding.
S103, removing the slot die. And carrying out exposure development on the slot die.
S104 transfers the LED device 20 onto the driving substrate 10. The LED device 20 is transferred onto the driving substrate 10 by a mechanical transfer method, a magnetic attraction method, or the like, but is not limited thereto.
This completes the manufacturing process of the LED panel 100 of the above embodiment.
In another embodiment provided in the present application, referring to fig. 4, the grating structure 30 includes a grating body 31 and a reflective layer fs, and the reflective layer fs is disposed on a side of the grating body 31 facing the LED device 20.
The reflective layer fs is made of a material that reflects light, such as mirror ink, but not limited thereto. Because grating main part 31 has set up reflection stratum fs towards the side laminating of LED device 20, the partial light that LED device 20 sent shines grating structure 30 on, is set up in the reflection stratum fs reflection of grating main part 31 side, and this partial light gets into the side viewing angle region through reflection stratum fs, for the side viewing angle region provides luminance.
The embodiment of the present application provides another method for manufacturing an LED panel 100.
S201 provides a driving substrate 10.
S202 a reflective layer fs is formed on the driving substrate 10. Forming a slot die on the driving substrate 10, spraying a reflective layer material on the side wall of the slot die, and pre-curing the reflective layer material to form a reflective layer fs.
The groove mold is made of a photoresist material by exposure and development, and the reflective layer fs is made of a material that can reflect light, such as mirror ink, but not limited thereto.
S203 forms the grating main body 31 on the drive substrate 10. The grating material is filled in the groove mold, and the grating material is post-cured to form the grating body 31.
The grating material is made of a material that can be formed by light curing and has a certain light absorption property, such as, but not limited to, a resin material doped with black molecules, wherein the light absorption property of the resin material can be adjusted by changing the doping ratio of the black molecules. Further, the transparent light guide 32 is mixed with the grating material, the density of the light guide 32 can be adjusted by the ratio of the light guide 32 to the resin material, and the grating material mixed with the light guide 32 is filled into the cavity mold and then cured and molded.
Wherein the post-curing temperature is higher than the pre-curing temperature. The post-curing temperature is higher than the pre-curing temperature, so that the grating material is cured and molded on one hand, and the formed reflective layer material is attached to the surface of the grating main body 31 through post-curing on the other hand.
S204, removing the slot die. And carrying out exposure development on the slot die.
S205 transfers the LED device 20 onto the driving substrate 10. The LED device 20 is transferred onto the driving substrate 10 by a mechanical transfer method, a magnetic attraction method, or the like, but is not limited thereto.
This completes the manufacturing process of the LED panel 100 of the above embodiment.
Referring to fig. 5, the present embodiment further provides a tiled display panel 1000, which includes at least two liquid crystal panels 200 and at least one LED panel 100.
The liquid crystal panel 200 is spliced to form a slit 300. The LED panel 100 is disposed on the light emitting side or the light incident side of two adjacent liquid crystal panels 200, and blocks the gap 300.
The LED panel 100 is the LED panel 100 according to any one of the above embodiments.
It can be understood that, since the viewing angle of the liquid crystal panel 200 is smaller than the viewing angle of the LED panel 100, the grating structure 30 disposed in the LED panel 100 not only enables the viewing angle of the liquid crystal panel 200 to be consistent with the viewing angle of the LED panel 100, but also improves the phenomenon that the brightness of the LED display panel suddenly drops with the change of the viewing angle, so that the brightness of the LED panel 100 at the side viewing angle gradually drops.
The LED panel and the tiled display panel provided by the present application are described in detail above.
According to the LED panel provided by the embodiment of the application, the grating structure is arranged around the LED device, the height of the grating structure is larger than that of the LED device, and the grating structure is used for penetrating and/or reflecting part of light rays emitted by the LED device.
The embodiment of the application adopts the grating structure to transmit and/or reflect part of light emitted by the LED device. The light rays with the larger visual angle emitted by the LED device penetrate through the grating structure and/or are reflected by the grating structure, so that the brightness of the side viewing angle of the LED device is compensated, the phenomenon that the brightness of the LED display panel suddenly drops along with the change of the visual angle is improved, and the brightness of the side viewing angle of the LED panel gradually drops.
The embodiment of the application also provides a spliced display panel, which comprises at least two liquid crystal panels and at least one LED panel.
The liquid crystal panel is spliced to form a gap. The LED panels are arranged on the light emitting sides or the light incident sides of the two adjacent liquid crystal panels and shield the gaps.
Wherein, the LED panel is the LED panel of any one of the above embodiments.
It can be understood that, because the viewing angle of the liquid crystal panel is smaller than that of the LED panel, the arrangement of the grating structure in the LED panel not only enables the viewing angle of the liquid crystal panel to be consistent with that of the LED panel, but also improves the phenomenon that the brightness of the LED display panel suddenly drops along with the change of the viewing angle, so that the brightness of the side viewing angle of the LED panel gradually drops.
The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.

Claims (10)

1. An LED panel, comprising:
a drive substrate;
the LED devices are arranged on the driving substrate at intervals;
the grating structure is arranged around the periphery of the LED device in a surrounding manner; the height of the grating structure is greater than that of the LED device; the grating structure is used for transmitting and/or reflecting part of light emitted by the LED device.
2. The LED panel of claim 1, wherein the grating structure comprises a grating body and a light guide disposed within the grating body; between two adjacent LED devices, the light guide body runs through the grating main body.
3. The LED panel of claim 2, wherein a first reflective layer is disposed between the light guide and the grating body.
4. The LED panel of claim 3, wherein the grating body comprises a first portion and a second portion disposed on the first portion, the light guide disposed within the second portion; the first portion is for blocking light.
5. The LED panel of claim 4, wherein a side of the first portion facing the LED devices is provided with a second reflective layer.
6. The LED panel of claim 4, wherein the first portion has a thickness less than a thickness of the second portion.
7. The LED panel of any of claims 2-6, wherein the light guide has an increasing density from a side of the grating structure closer to the driving substrate to a side farther from the driving substrate.
8. The LED panel of claim 2, wherein the light guide has a length equal to a width of the grating body.
9. The LED panel of claim 1, wherein the grating structure comprises a grating body and a reflective layer disposed on a side of the grating body facing the LED devices.
10. A tiled display panel, comprising:
the liquid crystal display panel comprises at least two liquid crystal panels, wherein gaps are formed in the liquid crystal panels in a splicing mode;
the LED panel according to any one of claims 1 to 9, wherein the LED panel is disposed on the light exit side or the light entrance side of two adjacent liquid crystal panels, and covers the gap.
CN202210678790.3A 2022-06-15 2022-06-15 LED panel and spliced display panel Active CN115171542B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115933234A (en) * 2022-11-08 2023-04-07 Tcl华星光电技术有限公司 Spliced display screen

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Publication number Priority date Publication date Assignee Title
JP2006331658A (en) * 2005-05-23 2006-12-07 Dainippon Printing Co Ltd Optical member for led backlight
CN109143665A (en) * 2018-09-13 2019-01-04 京东方科技集团股份有限公司 A kind of display panel and display device
CN110969953A (en) * 2018-09-28 2020-04-07 深圳光峰科技股份有限公司 LED display screen
CN111061091A (en) * 2019-12-31 2020-04-24 厦门天马微电子有限公司 Optical module and display device
CN114488601A (en) * 2022-01-25 2022-05-13 Tcl华星光电技术有限公司 Display panel
CN216647021U (en) * 2021-09-27 2022-05-31 荣耀终端有限公司 Backlight source structure, display module and electronic equipment

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006331658A (en) * 2005-05-23 2006-12-07 Dainippon Printing Co Ltd Optical member for led backlight
CN109143665A (en) * 2018-09-13 2019-01-04 京东方科技集团股份有限公司 A kind of display panel and display device
CN110969953A (en) * 2018-09-28 2020-04-07 深圳光峰科技股份有限公司 LED display screen
CN111061091A (en) * 2019-12-31 2020-04-24 厦门天马微电子有限公司 Optical module and display device
CN216647021U (en) * 2021-09-27 2022-05-31 荣耀终端有限公司 Backlight source structure, display module and electronic equipment
CN114488601A (en) * 2022-01-25 2022-05-13 Tcl华星光电技术有限公司 Display panel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115933234A (en) * 2022-11-08 2023-04-07 Tcl华星光电技术有限公司 Spliced display screen
CN115933234B (en) * 2022-11-08 2024-04-19 Tcl华星光电技术有限公司 Spliced display screen

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