CN115857219A - Display device - Google Patents
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- CN115857219A CN115857219A CN202211657429.9A CN202211657429A CN115857219A CN 115857219 A CN115857219 A CN 115857219A CN 202211657429 A CN202211657429 A CN 202211657429A CN 115857219 A CN115857219 A CN 115857219A
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- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 claims description 7
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- PPSZHCXTGRHULJ-UHFFFAOYSA-N dioxazine Chemical compound O1ON=CC=C1 PPSZHCXTGRHULJ-UHFFFAOYSA-N 0.000 claims description 3
- GWVMLCQWXVFZCN-UHFFFAOYSA-N isoindoline Chemical compound C1=CC=C2CNCC2=C1 GWVMLCQWXVFZCN-UHFFFAOYSA-N 0.000 claims description 2
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- OFKFBEJYOHXPIA-UHFFFAOYSA-N 2,3-dihydro-1h-isoindol-2-ium-1-carboxylate Chemical compound C1=CC=C2C(C(=O)O)NCC2=C1 OFKFBEJYOHXPIA-UHFFFAOYSA-N 0.000 description 1
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
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- 239000002904 solvent Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The application provides a display device, the display device includes: the liquid crystal display panel comprises a filter layer, wherein the filter layer comprises a plurality of infrared light filtering units and a plurality of visible light filtering units; the backlight module is positioned on the back side of the light emitting side of the liquid crystal display panel and comprises a plurality of infrared light emitting units and a plurality of visible light emitting units; under the condition that the display device is in a normal display mode, at least one visible light luminous unit is started, a plurality of infrared luminous units are closed, and visible light emitted by at least one visible light luminous unit is incident into the liquid crystal display panel and passes through at least one visible light filtering unit; under the condition that the display device is in an infrared display mode, the plurality of visible light emitting units are closed, at least one infrared light emitting unit is opened, and infrared light emitted by the at least one infrared light emitting unit is incident into the liquid crystal display panel and passes through the infrared light filtering unit.
Description
Technical Field
The application relates to the technical field of display, in particular to a display device.
Background
Liquid crystal displays have become the mainstream products of displays due to their advantages of small size, low power consumption, and low radiation. However, the current liquid crystal display has the problem of single function.
Therefore, a solution to the problem of single function of the lcd is needed.
Disclosure of Invention
An object of the present application is to provide a display device having a normal display mode and an infrared display mode, and having a diversified display function.
In order to realize the purpose, the technical scheme is as follows:
a display device having a normal display mode and an infrared display mode, the display device comprising:
the liquid crystal display panel comprises a filter layer, wherein the filter layer comprises a plurality of infrared light filtering units and a plurality of visible light filtering units; and
the backlight module is positioned on the back side of the light emitting side of the liquid crystal display panel and comprises a plurality of infrared light emitting units and a plurality of visible light emitting units;
under the condition that the display device is in a normal display mode, at least one visible light emitting unit is started, a plurality of infrared light emitting units are closed, and visible light emitted by at least one visible light emitting unit is incident into the liquid crystal display panel and passes through at least one visible light filtering unit;
under the condition that the display device is in an infrared display mode, the visible light emitting units are closed, at least one infrared light emitting unit is opened, and infrared light emitted by the at least one infrared light emitting unit is incident into the liquid crystal display panel and penetrates through the infrared light filtering unit.
In the display device of some embodiments, the plurality of visible light filtering units includes a red light filtering unit, and the red light filtering unit and the infrared light filtering unit are separately provided.
In the display device of some embodiments, the material of the infrared light filtering unit includes at least one of perylene, dioxazine, and isoindoline.
In some embodiments of the display device, the plurality of visible light filtering units further include a blue light filtering unit and a green light filtering unit, one of the blue light filtering units, one of the green light filtering units, one of the red light filtering units, and one of the infrared light filtering units form a repeating unit, and the plurality of repeating units are arranged in an array.
In the display device of some embodiments, the infrared light filtering unit is multiplexed into a red light filtering unit.
In some embodiments, the plurality of visible light filtering units include a blue light filtering unit and a green light filtering unit, one of the blue light filtering units, one of the green light filtering units, and one of the infrared light filtering units form a repeating unit, and the plurality of repeating units are arranged in an array.
In the display device of some embodiments, the liquid crystal display panel includes:
an array substrate including a plurality of thin film transistors;
an opposing substrate disposed opposite to a surface of the array substrate on which the thin film transistor is disposed; and
a liquid crystal layer disposed between the array substrate and the opposite substrate;
wherein the filter layer is disposed on one of the array substrate and the opposite substrate.
In some embodiments, the plurality of visible light emitting units includes at least one white light emitting unit for emitting white light.
In the display device of some embodiments, the plurality of visible light emitting units includes at least one red light emitting unit, at least one blue light emitting unit, and at least one green light emitting unit.
In some embodiments of the display device, the backlight module further includes a carrier plate, and the plurality of infrared light emitting units and the plurality of visible light emitting units are disposed on the carrier plate.
Has the advantages that: the application provides a display device, because liquid crystal display panel includes a plurality of infrared light filtering units and a plurality of visible light filtering units, backlight unit includes a plurality of infrared luminescence units and a plurality of visible light luminescence units. Under the condition that the display device is in a normal display mode, at least one visible light emitting unit is started, a plurality of infrared light emitting units are closed, and visible light emitted by at least one visible light emitting unit is incident into the liquid crystal display panel and passes through the visible light filtering unit to be displayed. Under the condition that the display device is in an infrared display mode, the plurality of visible light emitting units are closed, at least one infrared light emitting unit is opened, and infrared light emitted by the at least one infrared light emitting unit is incident into the liquid crystal display panel and passes through the infrared light filtering unit for displaying. The display device can be switched between the normal display mode and the infrared display mode, and the cost of the display device is reduced while the display function of the display device is richer.
Drawings
FIG. 1 is a schematic cross-sectional view of a display device according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of the LCD panel shown in FIG. 1;
fig. 3 is a schematic plan view of a lamp panel and a printed circuit board according to an embodiment of the present application;
FIG. 4 is a schematic cross-sectional view of a liquid crystal display panel of a display device according to another embodiment of the present application;
fig. 5 is a schematic plan view of a lamp panel and a printed circuit board according to another embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1 to 3, fig. 1 is a schematic cross-sectional view of a display device according to an embodiment of the present disclosure, fig. 2 is a schematic cross-sectional view of a liquid crystal display panel shown in fig. 1, and fig. 3 is a schematic plan view of a lamp panel and a printed circuit board according to an embodiment of the present disclosure.
In the present embodiment, as shown in fig. 1, the display device 100 includes a liquid crystal display panel 10 and a backlight module 20, and the backlight module 20 is located on the back side of the light emitting side of the liquid crystal display panel 10.
In the present embodiment, as shown in fig. 2 and 3, the liquid crystal display panel 10 includes an array substrate 101, a counter substrate 102, and a liquid crystal layer 103. The array substrate 101 includes a first substrate 1011 and a plurality of thin film transistors 1012, wherein the plurality of thin film transistors 1012 are disposed on the first substrate 1011. The counter substrate 102 is disposed opposite to the surface of the array substrate 101 on which the thin film transistors 1012 are disposed, and the counter substrate 102 includes a second substrate 1021. The liquid crystal layer 103 is disposed between the array substrate 101 and the counter substrate 102. The first substrate 1011 and the second substrate 1021 are both transparent glass substrates.
In the embodiment, the liquid crystal display panel 10 further includes a filter layer 30, and the filter layer 30 is disposed on one of the array substrate 101 and the opposite substrate 102 to filter light emitted from the backlight module 20 and incident into the liquid crystal display panel 10.
Specifically, the filter layer 30 is disposed on a surface of the second substrate 1021 near the array substrate 101. It is understood that the filter layer 30 may also be disposed on the array substrate 101, for example, the filter layer 30 is disposed on a surface of the thin film transistor 1012 away from the first substrate 1011.
In this embodiment, the filter layer 30 includes a plurality of infrared light filter units 301 and a plurality of visible light filter units 302.
In the embodiment, the infrared light filtering units 301 are multiplexed as a red light filtering unit, that is, the infrared light filtering units 301 are used for transmitting red light of infrared light and visible light and absorbing other light, so as to omit a process for preparing the red light filtering units and simplify a process for manufacturing the display device 100.
In view of the fact that the wavelength of red light is close to that of infrared light, the infrared light filter unit 301 has a higher transmittance for red light and infrared light than for light of other wavelengths, so that the infrared light filter unit 301 has the ability to transmit both red light and infrared light.
In this embodiment, the transmittance of the infrared light filter unit 301 for red light with a wavelength greater than or equal to 620 nm and less than or equal to 760 nm is greater than or equal to 50%, and the transmittance of the infrared light filter unit 301 for near-infrared light with a wavelength greater than 760 nm and less than or equal to 1100 nm is also greater than or equal to 50%.
In the present embodiment, the material of the infrared light filtering unit 301 includes, but is not limited to, perylene pigment, for example, the perylene pigment may be perylene pigment p.r.179 (reference number is pigment red 179). The material of the infrared light filter unit 301 further includes an organic dispersion medium in which a perylene pigment is dispersed.
In the present embodiment, the plurality of visible light filter units 302 include a blue light filter unit 3021 and a green light filter unit 3022. The blue light filter unit 3021 is configured to transmit blue light and absorb light of other wavelengths. The green filter unit 3022 serves to transmit green light and absorb light of other wavelengths.
In the present embodiment, one blue light filter unit 3021, one green light filter unit 3022, and one infrared light filter unit 301 constitute one repeating unit U, and a plurality of repeating units U are arranged in an array.
In the present embodiment, as shown in fig. 2 and 4, the backlight module 20 is a side-in type backlight module. It is understood that the backlight module 20 may also be a direct-type backlight module.
In this embodiment, the backlight module 20 includes a lamp panel 40, the lamp panel 40 includes a carrier 401, a plurality of infrared light emitting units 402 and a plurality of visible light emitting units 403, and the plurality of infrared light emitting units 402 and the plurality of visible light emitting units 403 are disposed on the carrier 401.
In the embodiment, the carrier 401 is a Printed Circuit Board (PCB). When the backlight module 20 is a direct-type backlight module, the carrier 401 may also be a glass substrate.
In the present embodiment, the plurality of infrared light emitting units 402 are configured to emit infrared light, and the wavelength of the infrared light is greater than 760 nm and less than or equal to 1100 nm, that is, the infrared light is near-infrared light.
In the present embodiment, the plurality of visible light emitting units 403 are used to emit visible light. The plurality of visible light emitting units 403 includes at least one white light emitting unit 4031, and the at least one white light emitting unit 4031 is configured to emit white light. In particular, the amount of the solvent to be used, the plurality of visible light emitting units 403 are all white light emitting units 4031.
In the present embodiment, each of the infrared light emitting units 402 and each of the visible light emitting units 403 may be at least one of an inorganic Light Emitting Diode (LED), a micro-LED, and a sub-millimeter light emitting diode (mini-LED).
In the present embodiment, the plurality of white light emitting units 4031 and the plurality of infrared light emitting units 402 are alternately disposed on the carrier 401 one to one.
In this embodiment, the backlight module 20 further includes a printed circuit board 50, and the printed circuit board 50 is electrically connected to the carrier 401. The printed circuit board 50 is used to control the plurality of infrared light emitting units 402 and the plurality of visible light emitting units 403 to emit light in a time-sharing manner.
In this embodiment, the backlight module 20 further includes a reflective sheet 60, a light guide plate 70, an optical film 80, a back frame 90, and a supporting member 010.
In this embodiment, the back frame 90 includes a bottom plate 901 and four side plates 902, the bottom plate 901 is rectangular, the four side plates 902 are respectively disposed along four edges of the bottom plate 901, and two adjacent side plates 902 are connected to each other, and the bottom plate 901 and the four side plates 902 enclose the accommodating cavity 90a. The back frame 90 further includes a horizontal support portion 903, and the horizontal support portion 903 is connected to one side plate 902 and is parallel to the bottom plate 901.
In this embodiment, the reflector plate 60 is disposed in the accommodating cavity 90a of the back frame 90 and located on the bottom plate 901 of the back frame 90, the lamp panel 40 is disposed in the accommodating cavity 90a and located on the bottom plate 901 of the back frame 90, and the lamp panel 40 is located on one side of the reflector plate 60.
In this embodiment, the light guide plate 70 is disposed on the reflector 60 and the lamp panel 40, the optical film 80 is disposed on one side of the light guide plate 70 away from the reflector 60, and the horizontal support portion 903 is located above the lamp panel 40. The optical film 80 includes, but is not limited to, at least one of a transparency increasing sheet and a diffusion sheet.
In the present embodiment, the supporting member 010 is disposed in the accommodating cavity 90a, and the supporting member 010 is disposed on the bottom plate 901 and disposed adjacent to three side plates 902 other than the one side plate 902 to which the horizontal supporting portion 903 is connected. The liquid crystal display panel 10 is fixed to the support 010 and the horizontal support 903 by an adhesive (not shown). Wherein, the bonding member includes, but is not limited to, foam cotton.
In the present embodiment, the display device 100 has a normal display mode and an infrared display mode, and the display device 100 can be switched between the normal display mode and the infrared display mode.
In this embodiment, when the display device 100 is in the normal display mode, the at least one visible light emitting unit 403 is turned on, the infrared light emitting units 402 are turned off, the visible light emitted from the at least one visible light emitting unit 403 is directly incident on the light guide plate 70 or reflected by the reflective sheet 60 into the light guide plate 70, the visible light is emitted from the light guide plate 70 and then incident on the optical film 80, the visible light emitted from the optical film 80 is incident on the liquid crystal display panel 10, passes through the visible light filtering unit 302 and the infrared light filtering unit 301, and is emitted from the light emitting surface of the liquid crystal display panel 10, so as to perform a conventional screen display.
After the visible light incident into the liquid crystal display panel 10 passes through the blue light filtering unit 3021, the blue light in the visible light is transmitted and the other light is absorbed; after the visible light incident into the liquid crystal display panel 10 passes through the green light filtering unit 3022, green light of the visible light is transmitted and other light is absorbed; after the visible light incident into the liquid crystal display panel 10 passes through the infrared light filter unit 301, red light in the visible light is transmitted and other light is absorbed.
In this embodiment, when the display device 100 is in the infrared display mode, the visible light emitting units 403 are turned off, at least one infrared emitting unit 402 is turned on, infrared light emitted by the at least one infrared emitting unit 402 is directly incident on the light guide plate 70 or reflected by the reflective sheet 60 into the light guide plate 70, the infrared light is emitted from the light guide plate 70 and then incident on the optical film 80, the infrared light emitted from the optical film 80 is incident on the liquid crystal display panel 10, and the infrared light passes through the infrared light filtering unit 301 and then exits from the light exit surface of the liquid crystal display panel 10, so as to perform infrared display.
The infrared display mode is generally used under special conditions. For example, the infrared display mode is used when processing confidential information in public. When the display apparatus 100 is in the infrared display mode, it is necessary to view the display apparatus 100 using a device capable of receiving infrared light.
In this embodiment, since the liquid crystal display panel includes a plurality of infrared light filtering units and a plurality of visible light filtering units, the backlight module includes a plurality of infrared light emitting units and a plurality of visible light emitting units. Under the condition that the display device is in a normal display mode, at least one visible light emitting unit is started, a plurality of infrared light emitting units are closed, and visible light emitted by at least one visible light emitting unit is incident into the liquid crystal display panel and passes through the visible light filtering unit to be displayed. Under the condition that the display device is in an infrared display mode, the plurality of visible light emitting units are closed, at least one infrared light emitting unit is opened, and infrared light emitted by the at least one infrared light emitting unit is incident into the liquid crystal display panel and passes through the infrared light filtering unit for displaying. The display device can be switched between the normal display mode and the infrared display mode, and the cost of the display device is reduced while the display function of the display device is richer.
Referring to fig. 4 and 5, fig. 4 is a schematic cross-sectional view of a liquid crystal display panel of a display device according to another embodiment of the present application, and fig. 5 is a schematic plan view of a lamp panel and a printed circuit board according to another embodiment of the present application.
In this embodiment, the lcd panel shown in fig. 4 is substantially similar to the lcd panel shown in fig. 2, and the same parts are not repeated, but the differences include that the visible light filter units 302 further include a red light filter unit 3023, and the red light filter unit 3023 and the infrared light filter unit 301 are respectively and independently disposed.
The red filter unit 3023 transmits red light and absorbs light of other wavelengths, so that the transmittance of the red light is higher than the transmittance of the light of other wavelengths. The infrared light filter 301 transmits infrared light and absorbs light of other wavelengths, so that the transmittance thereof for infrared light is higher than that for other light.
In the present embodiment, the material of the infrared light filtering unit 301 includes perylene, dioxazine and isoindolineAt least one of the infrared filter units 301 may have a maximum transmittance in a wavelength range of infrared light, and the infrared light may be near-infrared light, but is not limited thereto, and the infrared light may also be far-infrared light. Alternatively, the material of the infrared light filter unit 301 may also include LiF, mgO, and CaF 2 At least one of (1).
In the present embodiment, one blue light filter unit 3021, one green light filter unit 3022, one red light filter unit 3023, and one infrared light filter unit 301 constitute one repeating unit U, and a plurality of repeating units U are arranged in an array.
In this embodiment, the lamp panel 40 shown in fig. 5 is substantially similar to the lamp panel 40 shown in fig. 3, and the same parts are not repeated again, where the differences include: the plurality of visible light emitting units 403 includes at least one red light emitting unit 4034, at least one blue light emitting unit 4032, and at least one green light emitting unit 4033. The red light emitting unit 4034 is configured to emit red light, the blue light emitting unit 4032 is configured to emit blue light, and the green light emitting unit 4033 is configured to emit green light. It is understood that the plurality of visible light emitting units 403 may also include a yellow light emitting unit.
In the present embodiment, the red light emitting unit 4034, the blue light emitting unit 4032 and the green light emitting unit 4033 may be at least one of an inorganic light emitting diode, a micro light emitting diode and a sub-millimeter light emitting diode.
It is understood that the visible light emitting unit 403 may also include a light emitting unit and a color conversion layer. The color conversion layer includes, but is not limited to, at least one of a quantum dot film and a fluorescent film. The light emitting unit comprises at least one of an inorganic light emitting diode, a micro light emitting diode and a sub-millimeter light emitting diode.
When the display device 100 is in the normal display mode, the infrared light emitting units 402 are turned off, at least one of the red light emitting unit 4034, the blue light emitting unit 4032 and the green light emitting unit 4033 emits corresponding visible light, and the visible light enters the liquid crystal display panel 10, passes through at least one of the blue light filtering unit 3021, the green light filtering unit 3022 and the red light filtering unit 3023, and exits from a light exit surface of the liquid crystal display panel 10 to display a corresponding screen.
When the display apparatus 100 is in the infrared display mode, the red light emitting unit 4034, the blue light emitting unit 4032, and the green light emitting unit 4033 are all turned off, the infrared light emitting units 402 are turned on, infrared light enters the liquid crystal display panel 10, passes through the infrared light filtering unit 301, and exits from the light exit surface of the liquid crystal display panel 10 to display an infrared image, and the infrared image displayed by the display apparatus 100 can be viewed by using an infrared viewing device.
The above description of the embodiments is only for assisting understanding of the technical solutions and the core ideas thereof; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. A display device having a normal display mode and an infrared display mode, the display device comprising:
the liquid crystal display panel comprises a filter layer, wherein the filter layer comprises a plurality of infrared light filtering units and a plurality of visible light filtering units; and
the backlight module is positioned on the back side of the light emitting side of the liquid crystal display panel and comprises a plurality of infrared light emitting units and a plurality of visible light emitting units;
under the condition that the display device is in a normal display mode, at least one visible light emitting unit is started, a plurality of infrared light emitting units are closed, and visible light emitted by at least one visible light emitting unit is incident into the liquid crystal display panel and passes through at least one visible light filtering unit;
under the condition that the display device is in an infrared display mode, the visible light emitting units are closed, at least one infrared light emitting unit is opened, and infrared light emitted by the at least one infrared light emitting unit is incident into the liquid crystal display panel and penetrates through the infrared light filtering unit.
2. The display device according to claim 1, wherein the plurality of visible light filtering units include a red light filtering unit, and the red light filtering unit and the infrared light filtering unit are provided separately from each other.
3. The display device according to claim 2, wherein the material of the infrared light filtering unit comprises at least one of perylene, dioxazine, and isoindoline.
4. The display device according to claim 2, wherein the plurality of visible light filter units further include a blue light filter unit and a green light filter unit, one of the blue light filter units, one of the green light filter units, one of the red light filter units, and one of the infrared light filter units constitute one repeating unit, and the plurality of repeating units are arranged in an array.
5. The display device according to claim 1, wherein the infrared light filter unit is multiplexed into a red light filter unit.
6. The display device according to claim 5, wherein the plurality of visible light filtering units include a blue light filtering unit and a green light filtering unit, one of the blue light filtering units, one of the green light filtering units, and one of the infrared light filtering units form a repeating unit, and the plurality of repeating units are arranged in an array.
7. The display device according to any one of claims 1 to 6, wherein the liquid crystal display panel comprises:
an array substrate including a plurality of thin film transistors;
an opposing substrate disposed opposite to a surface of the array substrate on which the thin film transistor is disposed; and
a liquid crystal layer disposed between the array substrate and the opposite substrate;
wherein the filter layer is disposed on one of the array substrate and the opposite substrate.
8. The display device according to any one of claims 1 to 6, wherein the plurality of visible light emitting units includes at least one white light emitting unit, at least one of the white light emitting units being configured to emit white light.
9. The display device according to any one of claims 1 to 6, wherein the plurality of visible light emitting units include at least one red light emitting unit, at least one blue light emitting unit, and at least one green light emitting unit.
10. The display device according to any one of claims 1 to 6, wherein the backlight module further comprises a carrier plate, and the plurality of infrared light emitting units and the plurality of visible light emitting units are disposed on the carrier plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211657429.9A CN115857219A (en) | 2022-12-22 | 2022-12-22 | Display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211657429.9A CN115857219A (en) | 2022-12-22 | 2022-12-22 | Display device |
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