CN212364766U - Lamp panel, backlight module and display device - Google Patents
Lamp panel, backlight module and display device Download PDFInfo
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- CN212364766U CN212364766U CN202021156507.3U CN202021156507U CN212364766U CN 212364766 U CN212364766 U CN 212364766U CN 202021156507 U CN202021156507 U CN 202021156507U CN 212364766 U CN212364766 U CN 212364766U
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- 239000010410 layer Substances 0.000 claims abstract description 154
- 239000012790 adhesive layer Substances 0.000 claims abstract description 24
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- 238000004891 communication Methods 0.000 description 5
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- 230000005855 radiation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
The utility model relates to a show technical field, disclose a lamp plate, backlight unit and display device. Wherein the light emitting element includes a light emitting portion and an electro-variable portion; the electro-refraction part comprises a first electrode layer, a second electrode layer and an electro-refraction layer positioned between the first electrode layer and the second electrode layer, and the electro-refraction layer comprises a transparent adhesive layer and a plurality of electro-refraction units dispersed in the transparent adhesive layer; when the first electrode layer and the second electrode layer are not electrified, the refractive index of the electro-refractive unit is smaller than that of the transparent adhesive layer, and light rays emitted by the light-emitting element are in an astigmatism mode; when the first electrode layer and the second electrode layer are powered on, the refractive index of the electro-refractive unit is equal to that of the transparent adhesive layer, and light rays emitted by the light-emitting element are in a light receiving mode; when the backlight module with the lamp panel is applied to a display device, the display device has a wide viewing angle and a narrow viewing angle display mode due to the light-emitting element on the lamp panel having the light-scattering and light-receiving light-emitting modes.
Description
Technical Field
The utility model belongs to the technical field of the display technology and specifically relates to a lamp plate, backlight unit and display device are related to.
Background
Liquid Crystal Displays (LCDs) are widely used in consumer products such as various information and communication devices because of their advantages of small size, high image quality, no radiation, and low driving voltage. In recent years, with the rapid development of the photoelectric industry, people widely use, develop and research electronic communication equipment such as mobile phones, computers and flat panels, so that customers have great requirements on the satisfaction degree of the use effect of the electronic communication equipment. At present, people carry light, thin and small communication equipment for outgoing and traveling, and the communication equipment is more convenient and simpler. However, more and more information leakage is feared, and especially in public places such as buses, restaurants, hospitals and banks, a lot of people are inevitably around, and when the mobile phone is used, other people can easily see the information content displayed on the mobile phone, so that the information is exposed and even personal information is leaked.
Many liquid crystal display panels in the market can realize wide and narrow visual angle switching, and in a narrow visual angle mode, in order to achieve the peep-proof effect, the liquid crystal display panels are designed to leak light from the left side and the right side, so that the contrast in the left direction and the right direction is reduced, namely the whole picture of the liquid crystal display panel is seen from the side to be whitish, and the narrow visual angle peep-proof is realized. However, the left and right sides of the liquid crystal display panel leak light, which gives a feeling of glaring, and the liquid crystal display panel usually causes a phenomenon of flickering of a screen when the viewing angle is switched, and is inconvenient for good viewing.
Since the LCD panel itself in the LCD does not emit Light, a backlight module is required to be disposed on the back side of the LCD panel as a backlight source to normally display images, and the backlight source usually employs Light Emitting Diodes (LEDs), but at present, the Light Emitting mode of the Light Emitting element is single, and how to change the Light direction of a single Light Emitting element to realize different Light Emitting modes, thereby realizing different display modes of the display device.
SUMMERY OF THE UTILITY MODEL
The utility model provides a lamp plate, backlight unit and display device to realize that lamp plate, backlight unit have different luminous mode, display device and have different display mode.
In one aspect, an embodiment of the present invention provides a lamp panel, including a circuit board and at least one light emitting element located on the circuit board, where the light emitting element includes a light emitting portion and an electro-convertible portion, and the light emitting portion is located between the circuit board and the electro-convertible portion; the electro-refraction part comprises a first electrode layer, a second electrode layer and an electro-refraction layer positioned between the first electrode layer and the second electrode layer, and the electro-refraction layer comprises a transparent adhesive layer and a plurality of electro-refraction units dispersed in the transparent adhesive layer; when the first electrode layer and the second electrode layer are not electrified, the refractive index of the electro-refractive unit is smaller than that of the transparent adhesive layer, and light rays emitted by the light-emitting element are in an astigmatism mode; when the first electrode layer and the second electrode layer are powered on, the refractive index of the electro-refractive unit is equal to that of the transparent adhesive layer, and light emitted by the light-emitting element is in a light-receiving mode.
Further, the first electrode layer, the electro-refractive layer, and the second electrode layer are laminated in this order on a side of the light emitting section away from the circuit board.
Furthermore, the first electrode layer and the second electrode layer are respectively arranged on two opposite side surfaces of the electro-convertible layer, and the first electrode layer and the second electrode layer are both arranged perpendicular to the electro-convertible layer.
Further, the light emitting section is interposed between the first electrode layer and the second electrode layer.
Further, the light-emitting element further includes a separation layer located between the light-emitting portion and the electro-refractive layer.
Further, the light emitting element further includes a first insulating layer and a second insulating layer; the first insulating layer is located between the first electrode layer and the light emitting portion, and the second insulating layer is located between the second electrode layer and the light emitting portion.
Furthermore, the first electrode layer and the second electrode layer are made of ITO materials.
Further, the light emitting portion is a micro light emitting diode.
On the other hand, the embodiment of the utility model provides a still provide a backlight unit, including foretell lamp plate.
In another aspect, an embodiment of the present invention further provides a display device, including a liquid crystal display panel and the backlight module described above, the backlight module described above provides a direct type backlight source for the liquid crystal display panel.
The embodiment of the utility model provides a lamp plate sets up the light emitting component who has illuminating part and electro-conversion portion on the lamp plate, changes the refracting index of electro-conversion unit in the electro-conversion portion through whether to switch on first electrode and second electrode on the electro-conversion portion, thereby makes light emitting component have different luminous modes; when the first electrode and the second electrode are electrified, the refractive index of the electro-refractive unit is equal to that of the transparent adhesive layer, and light emitted by the light-emitting element is in a light receiving mode; when the first electrode and the second electrode are not electrified, the refractive index of the electro-refractive unit is smaller than that of the transparent adhesive layer, and light emitted by the light-emitting element is in an astigmatism mode. When the backlight module with the lamp panel is applied to a display device, the display device has different display modes, and when light emitted by the light-emitting element on the lamp panel is in a light scattering mode, the display device is in a wide viewing angle display mode; when the light emitted by the light-emitting element is in a light receiving mode, the display device is switched to a narrow viewing angle mode.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
fig. 1 is a schematic top view of a lamp panel provided in the first embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a light emitting element provided on a lamp panel according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an optical path when the light emitting element according to a first embodiment of the present invention is not powered;
fig. 4 is a schematic diagram of an optical path of a light emitting element when the light emitting element is powered on according to a first embodiment of the present invention;
fig. 5 is a schematic cross-sectional view of a light emitting device according to a second embodiment of the present invention;
fig. 6 is a schematic diagram of a wide viewing angle display mode of a display device according to a third embodiment of the present invention;
fig. 7 is a schematic view of a narrow viewing angle display mode of a display device according to a third embodiment of the present invention.
Detailed Description
In order to further explain the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, but not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example one
Fig. 1 is a schematic top view of a lamp panel provided in the first embodiment of the present invention; fig. 2 is a schematic cross-sectional view of a light emitting element provided on a lamp panel according to an embodiment of the present invention; fig. 3 is a schematic diagram of an optical path when the light emitting element according to a first embodiment of the present invention is not powered; fig. 4 is a schematic view of an optical path of a light emitting element when the light emitting element is powered on according to a first embodiment of the present invention.
Referring to fig. 1, the lamp panel includes a circuit board (not shown) and a plurality of light emitting elements 100 arranged in an array on the circuit board, the number of the light emitting elements 100 is not limited, and the light emitting elements can be arranged according to actual requirements, and the circuit board can be a PCB board or an FPC board.
Referring to fig. 2, the light emitting element 100 includes a light emitting portion 110 and an electro-variable portion 120, the light emitting portion 110 being located between a circuit board and the electro-variable portion 120; the light emitting part 110 includes a light emitting chip 112 and a phosphor layer 111 covering the light emitting chip 112; the electro-convertible part 120 includes a first electrode layer 121, a second electrode layer 123, and an electro-convertible layer (not shown) located between the first electrode layer 121 and the second electrode layer 123.
The first electrode layer 121, the electro-refractive layer, and the second electrode layer 123 are sequentially stacked on a side of the light emitting part 110 away from the circuit board, and under an electric field formed by the first electrode layer 121 and the second electrode layer 123, a refractive index of the electro-refractive layer changes according to a change of the electric field, thereby changing a light propagation path of the light emitting element. The first electrode layer 121 and the second electrode layer 123 are transparent electrode layers, and may be, but not limited to, Indium Tin Oxide (ITO) material.
Further, the electro-refractive layer includes a number of electro-refractive cells 122. The refractive index of the electro-refractive unit 122 may be changed according to a difference in an electric field formed between the first electrode layer 121 and the second electrode layer 123. The material used for the electro-convertible unit includes Methyl Methacrylate (MMA). Further, the electro-refractive layer may further include a transparent glue layer 124, and the plurality of electro-refractive units 122 are dispersed in the transparent glue layer 124, and the transparent glue layer 124 may include, but is not limited to, polymer glue. In this embodiment, in the normal state (i.e., the power-off state), the refractive index of the electro-refractive unit 122 is smaller than that of the transparent adhesive layer 124.
Further, the light emitting unit 110 may be a general LED lamp, or may be a micro light emitting diode (e.g., miniLED or micro LED) having a smaller size, and is not particularly limited.
The utility model discloses a theory of operation of embodiment: when the electro-refraction part is in a power-off state (namely in a normal state), the light-emitting part works normally at the moment, light emitted from the light-emitting part is emitted through the electro-refraction layer, according to the law of refraction, because the refractive index of an electro-refraction unit in the electro-refraction layer is smaller than that of the transparent adhesive layer, a light path can be changed when passing through the electro-refraction unit, and the light emitted from the electro-refraction layer is refracted at the moment, so that the light-emitting angle can be increased; when the electro-refraction part is in a power-on state, the electro-refraction layer is controlled through an electric field, so that light can be converted, the refractive index of the electro-refraction unit is consistent with that of the transparent adhesive layer where the electro-refraction unit is located, namely, light emitted into the electro-refraction layer from the light emitting part is not refracted, and the light emitting angle of the light emitted from the electro-refraction layer is reduced.
In this embodiment, referring to fig. 3 and 4, the first electrode layer 121, the electro-convertible layer and the second electrode layer 123 are stacked from bottom to top, that is, the first electrode layer and the second electrode layer are disposed in parallel on the upper and lower sides of the electro-convertible layer. When the first electrode layer 121 and the second electrode layer 123 are not powered, the refractive index n1 of the electro-refractive unit 122 is smaller than the refractive index n2 of the transparent adhesive layer 124, and the light emitted by the light emitting element 100 is in an astigmatism mode; when the first electrode layer 121 and the second electrode layer 123 are powered on, a vertical electric field E is formed between the first electrode layer 121 and the second electrode layer 123, and under the action of the vertical electric field, the refractive index n1 of the electro-refractive unit 122 is equal to the refractive index n2 of the transparent adhesive layer 124, and the light emitted by the light emitting element 100 is in a light receiving mode.
The embodiment of the utility model provides a lamp plate sets up the light emitting component who has illuminating part and electro-conversion portion on the lamp plate, changes the refracting index of electro-conversion portion through whether circular telegram to first electrode and second electrode on the electro-conversion portion to make light emitting component have different light mode.
Example two
Fig. 5 is a schematic cross-sectional view of a light emitting element according to a second embodiment of the present invention.
As shown in fig. 5, the light emitting element 200 includes a light emitting portion 210 and an electro-variable portion 220, the light emitting portion 210 being located between a circuit board and the electro-variable portion 220; the light emitting portion 210 includes a light emitting chip 212 and a phosphor layer 211 covering the light emitting chip 212; the electro-convertible part 220 includes a first electrode layer 221, a second electrode layer 223, and an electro-convertible layer located between the first electrode layer 221 and the second electrode layer 223, and the electro-convertible layer includes a transparent adhesive layer 224 and a plurality of electro-convertible units 222 dispersed in the transparent adhesive layer 224. The first electrode layer 221 and the second electrode layer 223 are respectively disposed on the left and right sides of the electro-convertible layer.
In this embodiment, the light emitting section 210 is interposed between the first electrode layer 221 and the second electrode layer 223.
In this embodiment, the light emitting element 200 further includes a separation layer 225 between the phosphor layer 211 and the electro-refractive layer of the light emitting portion 210. The upper electro-refractive layer is isolated from the lower light-emitting portion 210. Further, the separation layer 225 may be provided over the electro-refractive layer of the light-emitting element 200, but may not be provided.
In this embodiment, the light emitting device 200 may further include a protection layer 226 disposed on the light emitting side of the electro-refractive layer for protection. Further, the protective layer may be provided between the separation layer 225 and the electro-refractive layer on the light emitting portion 210, which is advantageous for packaging the light emitting element.
Further, in this embodiment, the light emitting element 200 may further include a first insulating layer (not shown) and a second insulating layer (not shown); a first insulating layer is located between the first electrode layer 221 and the light emitting part 210, and a second insulating layer is located between the second electrode layer 223 and the light emitting part 210. The electrode layer is separated from the light emitting section by providing an insulating layer.
The light emitting element 200 provided in the second embodiment can be disposed on a circuit board to form a lamp panel without doubt instead of the light emitting element 100 shown in the first embodiment, and details are not repeated herein.
The second embodiment is different from the first embodiment mainly in that: in this embodiment, the first electrode layer 221 and the second electrode layer 223 of the light emitting element 200 are respectively disposed on two opposite sides of the electro-convertible layer, and both the first electrode layer 221 and the second electrode layer 223 are disposed perpendicular to the electro-convertible layer. In this embodiment, when the first electrode layer 221 and the second electrode layer 223 are powered on, a horizontal electric field is formed between the first electrode layer 221 and the second electrode layer 223, and under the action of the horizontal electric field, the refractive index n1 of the electro-refractive unit 222 is equal to the refractive index n2 of the transparent adhesive layer 224, and the light emitted by the light emitting device 100 is in a light receiving mode.
EXAMPLE III
Fig. 6 is a schematic diagram of a wide viewing angle display mode of a display device according to a third embodiment of the present invention; fig. 7 is a schematic view of a narrow viewing angle display mode of a display device according to a third embodiment of the present invention.
The embodiment of the present invention further provides a display device, which includes a liquid crystal display panel 300 and a backlight module (not shown) located below the liquid crystal display panel 300, wherein the backlight module provides a direct type backlight source for the liquid crystal display panel 300. Backlight unit includes the lamp plate of above-mentioned embodiment. Because of this backlight unit contains the utility model discloses the lamp plate that the arbitrary embodiment provided, so this backlight unit has the astigmatism mode and receives the beneficial effect of light mode.
In fig. 6 and 7, the lamp panel is exemplarily shown to include the light emitting element 100 (of course, the light emitting element 200 may be used). In fig. 6, the light emitting device 100 is in the astigmatism mode, and the display device is in the wide viewing angle display mode; in fig. 7, if the light emitting device 100 is in the light receiving mode, the display device is in the narrow viewing angle display mode. When a user needs the display device to display a wide-viewing-angle picture, the effect of a wide viewing angle can be achieved, and furthermore, the hotspot problem can be improved. When a user needs a picture with a narrow viewing angle to protect the privacy of the user from being stolen during the use of the display device, the narrow viewing angle effect can be achieved by the method, and meanwhile, the optical brightness effect can be improved.
The embodiment of the utility model provides a lamp plate sets up the light-emitting component who has illuminating part and electro-deflection portion on the lamp plate, changes the refracting index of electro-deflection portion through whether to switch on first electrode and the second electrode on the electro-deflection portion, thereby makes light-emitting component have different light mode; when the first electrode and the second electrode are electrified, the refractive index of the electro-refraction unit in the electro-refraction layer is equal to that of the transparent adhesive layer, and light emitted by the light-emitting element is in a light-receiving mode; when the first electrode and the second electrode are not electrified, the refractive index of the electro-refraction unit of the electro-refraction layer is smaller than that of the transparent adhesive layer, and light emitted by the light-emitting element is in an astigmatism mode. When the backlight module with the lamp panel is applied to a display device, the display device has different display modes, and when light emitted by the light-emitting element on the lamp panel is in a light scattering mode, the display device is in a wide viewing angle display mode; when the light emitted by the light-emitting element is in a light receiving mode, the display device is switched to a narrow viewing angle mode.
The foregoing is a complete disclosure of the present invention, and in this specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including other elements not expressly listed, in addition to those elements listed.
In the present specification, the terms of front, rear, upper, lower and the like are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only used for the sake of clarity and convenience in technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A lamp panel comprises a circuit board and at least one light-emitting element positioned on the circuit board, and is characterized in that the light-emitting element comprises a light-emitting part and an electro-conversion part, wherein the light-emitting part is positioned between the circuit board and the electro-conversion part;
the electro-refraction part comprises a first electrode layer, a second electrode layer and an electro-refraction layer positioned between the first electrode layer and the second electrode layer, and the electro-refraction layer comprises a transparent adhesive layer and a plurality of electro-refraction units dispersed in the transparent adhesive layer;
when the first electrode layer and the second electrode layer are not electrified, the refractive index of the electro-refractive unit is smaller than that of the transparent adhesive layer, and light rays emitted by the light-emitting element are in an astigmatism mode;
when the first electrode layer and the second electrode layer are powered on, the refractive index of the electro-refractive unit is equal to that of the transparent adhesive layer, and light emitted by the light-emitting element is in a light-receiving mode.
2. The lamp panel of claim 1, wherein the first electrode layer, the electro-refractive layer, and the second electrode layer are sequentially stacked on a side of the light emitting portion away from the circuit board.
3. The lamp panel of claim 1, wherein the first electrode layer and the second electrode layer are respectively disposed on two opposite side surfaces of the electro-refractive layer, and the first electrode layer and the second electrode layer are both perpendicular to the electro-refractive layer.
4. The lamp panel according to claim 3, wherein the light emitting portion is interposed between the first electrode layer and the second electrode layer.
5. The light panel of claim 4, wherein the light-emitting element further comprises a separation layer between the light-emitting portion and the electro-refractive layer.
6. The lamp panel of claim 4, wherein the light emitting element further comprises a first insulating layer and a second insulating layer; the first insulating layer is located between the first electrode layer and the light emitting portion, and the second insulating layer is located between the second electrode layer and the light emitting portion.
7. The lamp panel of claim 1, wherein the first electrode layer and the second electrode layer are made of ITO.
8. The lamp panel of claim 1, wherein the light emitting portion is a micro light emitting diode.
9. A backlight module characterized by comprising the lamp panel of any one of claims 1 to 8.
10. A display device comprising a liquid crystal display panel and the backlight module of claim 9, wherein the backlight module provides a direct-type backlight source for the liquid crystal display panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021156507.3U CN212364766U (en) | 2020-06-22 | 2020-06-22 | Lamp panel, backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021156507.3U CN212364766U (en) | 2020-06-22 | 2020-06-22 | Lamp panel, backlight module and display device |
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| Publication Number | Publication Date |
|---|---|
| CN212364766U true CN212364766U (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021156507.3U Active CN212364766U (en) | 2020-06-22 | 2020-06-22 | Lamp panel, backlight module and display device |
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| Country | Link |
|---|---|
| CN (1) | CN212364766U (en) |
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- 2020-06-22 CN CN202021156507.3U patent/CN212364766U/en active Active
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