CN112596304A - Backlight module of display device and display device - Google Patents

Backlight module of display device and display device Download PDF

Info

Publication number
CN112596304A
CN112596304A CN202011612409.0A CN202011612409A CN112596304A CN 112596304 A CN112596304 A CN 112596304A CN 202011612409 A CN202011612409 A CN 202011612409A CN 112596304 A CN112596304 A CN 112596304A
Authority
CN
China
Prior art keywords
layer
light emitting
light
backlight module
retaining wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202011612409.0A
Other languages
Chinese (zh)
Other versions
CN112596304B (en
Inventor
包亚洲
杨刚
徐田雨
何海龙
王世鑫
商建通
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOE Technology Group Co Ltd
Beijing BOE Optoelectronics Technology Co Ltd
Original Assignee
BOE Technology Group Co Ltd
Beijing BOE Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BOE Technology Group Co Ltd, Beijing BOE Optoelectronics Technology Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to CN202011612409.0A priority Critical patent/CN112596304B/en
Publication of CN112596304A publication Critical patent/CN112596304A/en
Application granted granted Critical
Publication of CN112596304B publication Critical patent/CN112596304B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement

Abstract

The invention discloses a backlight module of a display device and the display device, wherein the backlight module comprises: the light-emitting module comprises a substrate, a plurality of light-emitting units and a retaining wall, wherein the substrate comprises a plurality of light-emitting areas, the light-emitting units are respectively arranged in the light-emitting areas, the number of the light-emitting units is the same as that of the light-emitting areas, the light-emitting units correspond to the light-emitting areas one by one, each light-emitting unit comprises at least one light-emitting piece, each light-emitting unit is controlled independently, the retaining wall is arranged on the substrate and located between the adjacent light-emitting areas, the retaining wall has a first state and a second state, the retaining wall can penetrate light when the retaining wall is in. According to the backlight module provided by the embodiment of the invention, the halo problem at the bright-dark junction during the regional control of the backlight source can be improved under the condition that the normal light-emitting effect is not influenced, and higher brightness and contrast can be ensured.

Description

Backlight module of display device and display device
Technical Field
The invention relates to the technical field of display, in particular to a backlight module of a display device and the display device.
Background
Today, with the continuous development of information and display technologies, people are pursuing higher and higher display technical effects, and the traditional LCD display screen can not meet the pursuit of people for high contrast and high color gamut. In the related art, several lamps in each backlight module are independently controlled as a unit, namely, the partition control is realized, the local partition dimming can be realized, and the backlight module has higher brightness and contrast compared with the traditional backlight module.
However, a common problem of the related art backlight with partition control is the halo problem, that is, when the partitions are lit, the light at the edges of the lit cells affects the critical dark areas, so that the edges are not completely dark, and the halo phenomenon is formed.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a backlight module of a display device, which can improve the halo problem at the bright-dark boundary when the backlight is controlled in different regions without affecting the normal light-emitting effect.
The invention also provides a display device with the backlight module.
According to a first aspect of the invention, a backlight module of a display device comprises: a substrate including a plurality of light emitting areas; the light emitting units are respectively arranged in the light emitting areas, the number of the light emitting units is the same as that of the light emitting areas, the light emitting units correspond to the light emitting areas one by one, each light emitting unit comprises at least one light emitting piece, and each light emitting unit is independently controlled; the barricade, the barricade is established just be located on the base plate and adjacent between the luminous zone, the barricade has first state and second state the barricade is in during the first state barricade permeable light the barricade is in during the second state, barricade reflective light.
According to the backlight module of the display device, the retaining wall is arranged between the adjacent light emitting areas, and the retaining wall can be switched between the first state and the second state, so that the retaining wall can transmit light rays when in the first state and can reflect the light rays when in the second state, the halo problem existing at the light and shade junction when the backlight source is controlled in different areas can be solved under the condition that the normal light emitting effect is not influenced, and higher brightness and contrast can be ensured.
According to some embodiments of the invention, the retaining wall is arranged between every two adjacent light emitting areas, and each retaining wall is independently controlled.
According to some embodiments of the present invention, the retaining wall includes a first electrode layer, a second electrode layer and a variable layer, the first electrode layer and the second electrode layer are transparent, the first electrode layer and the second electrode layer are opposite and spaced apart, the variable layer is disposed between the first electrode layer and the second electrode layer, the variable layer can transmit light when the retaining wall is in the first state, and the variable layer can reflect light when the retaining wall is in the second state.
In some optional embodiments of the present invention, the variable layer includes a transparent electrolyte layer and a transparent counter electrode material layer, the counter electrode material layer is disposed on the second electrode layer, the electrolyte layer is disposed between the first electrode layer and the counter electrode material layer, when a voltage between the first electrode layer and the second electrode layer is a first voltage, the electrolyte layer precipitates an opaque reflective layer, the reflective layer is disposed between the electrolyte layer and the first electrode layer, the reflective layer can reflect light, and the retaining wall is in the second state; when the voltage between the first electrode layer and the second electrode layer is a second voltage, the reflecting layer is dissolved into the electrolyte layer, the retaining wall is in the first state, and the second voltage is different from the first voltage.
Further, the electrolyte layer is an electrolyte solution layer, the electrolyte layer includes at least one metal ion, and the reflective layer is a metal layer, wherein one of the metal ions is an ion of a metal contained in the gold reflective layer.
According to some embodiments of the invention, the control circuit of the retaining wall is disposed on the substrate.
According to some embodiments of the present invention, the backlight module includes a transparent protection layer group, at least a portion of the protection layer group fills the light emitting region and covers the light emitting unit, and a portion of the protection layer group opposite to the light emitting region is formed with a deflection structure for deflecting light emitted from the light emitting unit toward a front direction adjacent to the display device.
In some optional embodiments of the invention, the set of protection layers comprises: the first protective layer is filled in the light emitting area and covers the light emitting units, and the deflection structure is formed on one side, far away from the substrate, of the first protective layer; a second protective layer covering the first protective layer and the barrier wall.
In some alternative embodiments of the invention, the deflecting structure is saw-toothed.
According to a second aspect of the invention, a display device includes: a liquid crystal panel; the backlight module according to the above first aspect of the present invention is disposed on the back side of the liquid crystal panel.
According to the display device provided by the embodiment of the invention, by arranging the backlight module, the halo problem at the light and shade boundary when the backlight source is controlled in different areas can be solved under the condition that the normal light emitting effect is not influenced, and higher brightness and contrast can be ensured.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic view of a backlight module according to some embodiments of the invention, wherein a retaining wall is in a first state;
FIG. 2 is a schematic light path diagram of a backlight module according to some embodiments of the invention, wherein the dam is in a first state;
FIG. 3 is a schematic view of a backlight module according to some embodiments of the invention, wherein a portion of the barrier wall is in a second state;
FIG. 4 is a schematic optical path diagram of a backlight module according to some embodiments of the present invention, in which some of the blocking walls are in a second state;
FIG. 5 is a partial schematic view of a backlight module according to some embodiments of the invention;
FIG. 6 is a schematic view of a retaining wall of a backlight module according to some embodiments of the present invention, wherein the retaining wall is in a first state;
FIG. 7 is a schematic view of a retaining wall of a backlight module according to some embodiments of the invention, wherein the retaining wall is in a second state;
fig. 8 is a schematic partial process diagram of a backlight module according to some embodiments of the invention.
Reference numerals:
a backlight module 100;
a substrate 1; a light emitting region 11; a control circuit 12;
a light emitting unit 2; a light emitting member 21;
a retaining wall 3; a first electrode layer 31; a second electrode layer 32; a variable layer 33; a counter electrode material layer 331; an electrolyte layer 332; a reflective layer 333;
the first protective layer 41; a deflecting structure 411; the second protective layer 42;
an optical film material layer group 5; an optical film layer 51.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
The backlight assembly 100 of the display device according to the embodiment of the present invention is described below with reference to fig. 1 to 8 (the direction of the arrow in fig. 2, 4, 6 and 7 is the transmission direction of the light emitted from the light emitting unit 2).
As shown in fig. 1 to 4, a backlight module 100 of a display device according to an embodiment of the first aspect of the invention includes: a substrate 1, a plurality of light emitting units 2, and a dam 3.
The substrate 1 includes a plurality of light emitting areas 11, the plurality of light emitting areas 11 may be arranged in a matrix, the plurality of light emitting units 2 are respectively disposed in the plurality of light emitting areas 11, the number of the light emitting units 2 is the same as that of the light emitting areas 11, and the one-to-one correspondence is made, each light emitting unit 2 includes at least one light emitting member 21, each light emitting unit 2 may include one light emitting member 21, each light emitting unit 2 may also include a plurality of light emitting members 21, for example, each light emitting unit 2 includes two light emitting members 21, and the light emitting members 21 may be LED lamps. Each light emitting unit 2 is independently controlled, and the regional control of the backlight source can be realized by independently controlling each light emitting unit 2, so that the local regional dimming can be realized, and compared with the traditional backlight, the backlight source has higher brightness and contrast and the display effect is improved.
It is to be understood that the term "plurality" as used herein means two or more.
The barriers 3 are disposed on the substrate 1 and between the adjacent light emitting regions 11, and the barriers 3 are disposed between the adjacent light emitting units 2. The retaining wall 3 has a first state and a second state, the retaining wall 3 can transmit light when the retaining wall 3 is in the first state, and the retaining wall 3 can reflect light when the retaining wall 3 is in the second state. The retaining wall 3 can be electrically connected to the control chip on the substrate 1, and the state of the retaining wall 3 can be controlled by the control chip, and the state of the retaining wall 3 can be adjusted according to the state of the light emitting unit 2 of the adjacent light emitting region 11, for example, the state of the retaining wall 3 can be changed by changing the voltage of the retaining wall 3.
Optionally, the retaining wall 3 may be connected to the control chip through the control circuit 12, and the control circuit 12 of the retaining wall 3 may be disposed on the substrate 1, so as to facilitate the routing of the control circuit 12 of the retaining wall 3.
Alternatively, a retaining wall 3 is disposed between every two adjacent light emitting areas 11, that is, a retaining wall 3 is disposed between every two adjacent light emitting units 2, each retaining wall 3 is independently controlled, for example, each retaining wall 3 is connected to a control chip on the substrate 1 through an independent control circuit 12, and the control chip can control the state of each retaining wall 3.
Referring to fig. 1, 2 and 6, when the adjacent light emitting units 2 are all working, the adjacent light emitting areas 11 are bright areas, and the retaining wall 3 at the junction of the adjacent bright areas is controlled to be in the first state, at this time, the whole retaining wall 3 may be transparent, the retaining wall 3 may transmit light, the light emitted by the adjacent light emitting units 2 may transmit through the retaining wall 3, and may mix light at the retaining wall 3, so that the light mixing between the adjacent light emitting units 2 is not affected, and the light emitting effect is ensured.
Referring to fig. 3, 4 and 7, when one of the adjacent light emitting units 2 works and the other does not work, one of the adjacent light emitting areas 11 is a bright area and the other is a dark area, a bright-dark boundary exists between the adjacent light emitting units 2 at this time, the retaining wall 3 at the boundary of the bright area and the dark area is controlled to be in the second state, the retaining wall 3 can reflect light at this time, and when the light emitted by the light emitting unit 2 in the bright area is emitted to the retaining wall 3, the retaining wall 3 reflects the light back, so that the halo problem at the bright-dark boundary during the regional control of the backlight source can be avoided or improved.
By arranging the retaining walls 3 between the adjacent light emitting regions 11, and switching the retaining walls 3 between the first state and the second state, the retaining walls 3 are light-permeable when in the first state and light-reflective when in the second state. Specifically, when the adjacent light emitting units 2 are all working, the retaining wall 3 can transmit light, and the light emitted by the adjacent light emitting units 2 can transmit the retaining wall 3 and can be mixed at the position of the retaining wall 3, so that the light mixing between the adjacent light emitting units 2 is not influenced, and the light emitting effect is ensured; when one of the adjacent light-emitting units 2 works and the other does not work, the retaining wall 3 can reflect light, and when the light-emitting unit 2 in a bright area emits light to the retaining wall 3, the retaining wall 3 reflects the light back, so that the halo problem at the light and dark junction when the backlight source is controlled in different areas can be avoided or improved. Therefore, under the condition of not influencing the normal light-emitting effect, the halo problem existing at the light and shade junction when the backlight source is controlled in a subarea mode can be solved, and higher brightness and contrast can be guaranteed.
According to the backlight module 100 of the display device of the embodiment of the invention, the retaining wall 3 is arranged between the adjacent light emitting areas 11, and the retaining wall 3 can be switched between the first state and the second state, so that the retaining wall 3 can transmit light when in the first state and reflect light when in the second state, the halo problem existing at the light and dark junction when the backlight source is controlled in the subareas can be improved under the condition of not influencing the normal light emitting effect, and higher brightness and contrast can be ensured.
According to some embodiments of the present invention, referring to fig. 1 to 7, the dam 3 includes a first electrode layer 31, a second electrode layer 32 and a variable layer 33, and both the first electrode layer 31 and the second electrode layer 32 are transparent, for example, the first electrode layer 31 may be an Indium Tin Oxide (ITO) thin film or a fluorine-doped tin oxide (FTO) thin film, and the second electrode layer 32 may be an Indium Tin Oxide (ITO) thin film or a fluorine-doped tin oxide (FTO) thin film. The first electrode layer 31 and the second electrode layer 32 are disposed opposite to each other at an interval, the variable layer 33 is disposed between the first electrode layer 31 and the second electrode layer 32, the variable layer 33 can transmit light when the bank 3 is in the first state, and the variable layer 33 can reflect light when the bank 3 is in the second state. Both the first electrode layer 31 and the second electrode layer 32 can be connected to a control chip on the substrate 1 through a control circuit 12. For example, the state of the variable layer 33 may be changed by changing a voltage between the first electrode layer 31 and the second electrode layer 32, so that the variable layer 33 is switched between two states of permeable light and reflective light.
Referring to fig. 1, fig. 2 and fig. 6, when the adjacent light emitting units 2 are all working, the adjacent light emitting areas 11 are all bright areas, the retaining wall 3 at the junction of the adjacent bright areas is controlled to be in the first state, for example, no voltage or negative voltage is applied between the first electrode layer 31 and the second electrode layer 32 of the retaining wall 3, the variable layer 33 can be transparent, and the variable layer 33 can transmit light, so that the whole retaining wall 3 is transparent, the whole retaining wall 3 can transmit light, the light emitted by the adjacent light emitting units 2 can transmit the retaining wall 3, and can be mixed at the retaining wall 3, so that the light mixing between the adjacent light emitting units 2 is not affected, and the light emitting effect is ensured.
Referring to fig. 3, 4 and 7, when one of the adjacent light emitting units 2 works and the other does not work, one of the adjacent light emitting units 11 is a bright area and the other is a dark area, a bright-dark boundary exists between the adjacent light emitting units 2, and the retaining wall 3 at the boundary between the bright area and the dark area is controlled to be in the second state, for example, a forward voltage is applied between the first electrode layer 31 and the second electrode layer 32 of the retaining wall 3, so that the variable layer 33 can reflect light, and when the light emitted by the light emitting unit 2 in the bright area is emitted to the retaining wall 3, the variable layer 33 reflects the light back when the light reaches the variable layer 33, so that the halo problem at the bright-dark boundary when the backlight is controlled in different areas can be avoided or improved.
In some alternative embodiments of the present invention, referring to fig. 1-7, the variable layer 33 includes a transparent electrolyte layer 332 and a transparent counter electrode material layer 331, the counter electrode material layer 331 is disposed on the second electrode layer 32, and the electrolyte layer 332 is disposed between the first electrode layer 31 and the counter electrode material layer 331. When the voltage between the first electrode layer 31 and the second electrode layer 32 is a first voltage (for example, the first voltage may be a forward voltage), the electrolyte layer 332 may precipitate the opaque reflective layer 333, the precipitated reflective layer 333 is located between the electrolyte layer 332 and the first electrode layer 31, the reflective layer 333 may reflect light, and the retaining wall 3 is in the second state; when the voltage between the first electrode layer 31 and the second electrode layer 32 is a second voltage (for example, the second voltage may be zero or negative voltage), a chemical reaction occurs between the reflective layer 333 and the electrolyte layer 332, so that the reflective layer 333 is dissolved into the electrolyte layer 332 until the reflective layer 333 is completely dissolved into the electrolyte layer 332, at this time, the reflective layer 333 disappears, the variable layer 33 becomes transparent again, the variable layer 33 can transmit light, and the retaining wall 3 is in the first state at this time, where the second voltage is different from the first voltage.
Referring to fig. 3, 4 and 7, when one of the adjacent light emitting units 2 is operated and the other is not operated, one of the adjacent light emitting units 11 is a bright region and the other is a dark region, a bright-dark boundary exists between the adjacent light emitting units 2, a first voltage is applied between the first electrode layer 31 and the second electrode layer 32 of the retaining wall 3 at the boundary between the bright region and the dark region, the electrolyte layer 332 can precipitate an opaque reflective layer 333, the precipitated reflective layer 333 is located between the electrolyte layer 332 and the first electrode layer 31, the reflective layer 333 can reflect light, the variable layer 33 can reflect light, thereby controlling the retaining wall 3 at the boundary between the bright region and the dark region to be in the second state, so that the retaining wall 3 can reflect light, when light emitted by the light emitting unit 2 of the bright region is emitted toward the retaining wall 3, the reflective layer 333 of the variable layer 33 reflects light back when the light reaches the reflective layer 333 of the variable layer 33, therefore, the halo problem existing at the bright-dark junction during the regional control of the backlight source can be avoided or improved.
Referring to fig. 1, 2 and 6, when the adjacent light emitting units 2 are all operated, the adjacent light emitting areas 11 are all bright areas, a second voltage is applied between the first electrode layer 31 and the second electrode layer 32 of the retaining wall 3 at the interface of the adjacent bright areas, a chemical reaction occurs between the reflective layer 333 and the electrolyte layer 332, so that the reflective layer 333 is dissolved into the electrolyte layer 332 until the reflective layer 333 is completely dissolved into the electrolyte layer 332, at this time, the reflective layer 333 disappears, the variable layer 33 becomes transparent again, the variable layer 33 can transmit light, thereby controlling the retaining wall 3 at the interface of the adjacent bright areas to be in the first state, so that the whole retaining wall 3 is transparent, the whole retaining wall 3 can transmit light, the light emitted by the adjacent light emitting units 2 can transmit through the retaining wall 3, and can mix light at the retaining wall 3, so that the light mixing between the adjacent light emitting units 2 is not affected, the light emitting effect is ensured.
Further, the electrolyte layer 332 may be an electrolyte solution layer, the electrolyte layer 332 includes at least one metal ion, and the reflective layer 333 is a metal layer, wherein one metal ion is an ion of a metal contained in the reflective layer 333. By providing the electrolyte layer 332 as an electrolyte solution layer and providing the electrolyte layer 332 to include at least one metal ion, it is possible to easily achieve precipitation of the reflective layer 333 from within the electrolyte layer 332 or dissolution of the reflective layer 333 into the electrolyte layer 332. For example, the electrolyte layer 332 may include silver ions, and the reflective layer 333 may be a silver layer; as another example, the electrolyte layer 332 may include silver ions and lithium ions, and the reflective layer 333 may be a silver layer.
Alternatively, when the electrolyte layer 332 is an electrolyte solution layer, a solvent of the electrolyte solution may be at least one of propylene carbonate and ethylene glycol, and silver nitrate (AgNO3) and lithium bromide (LiBr), which may exist in the form of Ag ions and Li ions, may be added to the solvent.
The counter electrode material layer 331 may include an ion storage material or an electrochromic material. During the reversible reaction of the variable layer 33 described above, the counter electrode material layer 331 may participate in a reduction reaction or an oxidation reaction involving ions and electrons that receive or release the electrolyte layer 332. Wherein, when the counter electrode material layer 331 is an ion storage material, the counter electrode material layer 331 can maintain a transparent state in both a reduction reaction and an oxidation reaction, and when the counter electrode material layer 331 is an electrochromic material, the counter electrode material layer 331 can change a color due to the reduction reaction or the oxidation reaction. When the counter electrode material layer 331 is composed of an electrochromic material, the counter electrode material layer 331 may be transparent while displaying colors like colored glass.
Alternatively, the counter electrode material layer 331 may include tungsten oxide (WO)3) Cerium oxide (CeO)2) Titanium oxide (TiO)2) Nickel oxide (NiO), molybdenum oxide (MoO)3) At least one of (1). Among them, tungsten oxide (WO3), nickel oxide (NiO) and molybdenum oxide (MoO)3) Both electrochromic materials, cerium oxide (CeO2) and titanium oxide (TiO2) are ion storage materials.
The reaction of the variable layer 33 will be specifically described below by taking an example in which the electrolyte solution layer contains silver ions and lithium ions, wherein the solvent of the electrolyte solution layer may be at least one of propylene carbonate and ethylene glycol, and silver nitrate (AgNO3) and lithium bromide (LiBr), silver nitrate (AgNO3) and lithium bromide (LiBr) may be added to the solventLithium bromide (LiBr) is soluble and is thereby ionized into silver ions (Ag)+) Bromine ion (Br)-) Lithium ion (Li)+) And nitrate ion (NO 3)-)。
The variable layer 33 of the retaining wall 3 may be transparent when initially manufactured.
Referring to fig. 3, 4 and 7, when one of the adjacent light emitting units 2 is operated and the other is not operated, one of the adjacent light emitting units 11 is a bright region and the other is a dark region, and there exists a bright-dark boundary between the adjacent light emitting units 2, a first voltage is applied between the first electrode layer 31 and the second electrode layer 32 of the retaining wall 3 at the boundary between the bright region and the dark region, metal ions (silver ions) in the electrolyte layer 332 can receive electrons from the first electrode layer 31, thereby being reduced and forming an electrodeposited reflective layer 333 (silver layer) on the first electrode layer 31, the precipitated reflective layer 333 is located between the electrolyte layer 332 and the first electrode layer 31, the reflective layer 333 can reflect light, the variable layer 33 can reflect light, thereby controlling the retaining wall 3 at the boundary between the bright region and the dark region to be in the second state, thereby enabling the retaining wall 3 to reflect light, when the light emitted by the light emitting unit 2 in the bright region is emitted to the retaining wall 3, and when the light reaches the reflective layer 333 of the variable layer 33, the reflective layer 333 of the variable layer 33 reflects the light back, so that the halo problem at the light and dark boundary when the backlight is controlled in the sub-region can be avoided or improved.
The chemical reaction of the variable layer 33 is as follows:
reaction formula one (Ag)+Reduction):
Figure BDA0002875110720000081
reaction formula II (Br)-Oxidation):
Figure BDA0002875110720000082
the reduction reaction of the first reaction formula may occur on the first electrode layer 31, and the oxidation reaction of the second reaction formula may occur on the second electrode layer 32.
Referring to fig. 1, 2 and 6, when the adjacent light emitting units 2 are all operated, the adjacent light emitting areas 11 are all bright areas, a second voltage is applied between the first electrode layer 31 and the second electrode layer 32 of the retaining wall 3 at the interface of the adjacent bright areas, a chemical reaction occurs between the reflective layer 333 (silver layer) and the electrolyte layer 332, so that the reflective layer 333 is dissolved into the electrolyte layer 332 until the reflective layer 333 is completely dissolved into the electrolyte layer 332, at this time, the reflective layer 333 disappears, the variable layer 33 becomes transparent again, the variable layer 33 can transmit light, thereby controlling the retaining wall 3 at the interface of the adjacent bright areas to be in the first state, so that the entire retaining wall 3 is transparent, the entire retaining wall 3 can transmit light, the light emitted by the adjacent light emitting units 2 can transmit through the retaining wall 3, and can be mixed at the retaining wall 3, and thus the mixed light between the adjacent light emitting units 2 is not affected, the light emitting effect is ensured.
The chemical reaction of the variable layer 33 is as follows:
reaction formula three (Ag oxidation):
Figure BDA0002875110720000083
reaction formula IV (Br)3 -Reduction):
Figure BDA0002875110720000084
the oxidation reaction of reaction formula three may occur on the reflective layer 333, and the reduction reaction of reaction formula four may occur on the second electrode layer 32.
The counter electrode material layer 331 may be at Br during dissolution of the metal layer (silver layer)3 -The ions are reduced before arrival and act to temporarily accept electrons generated as the Ag dissolves (oxidizes) and then slowly give off and accept Br3 -Ionic and electronic mediators (mediators).
According to some embodiments of the present invention, referring to fig. 1 to 4, the backlight module 100 includes a transparent protection layer group, at least a portion of the protection layer group is filled in the light emitting region 11 and covers the light emitting unit 2, for example, a portion of the protection layer group is filled between the light emitting members 21 of the light emitting region 11 and on the outer periphery side of the light emitting members 21 and covers the side of the light emitting unit 2 away from the substrate 1, and the protection layer group may be a transparent resin layer. The portion of the protective layer group opposite to the light emitting region 11 is formed with a deflecting structure 411, and the deflecting structure 411 is used for deflecting the light emitted from the light emitting unit 2 toward the front direction of the adjacent display device. Therefore, when the light emitted by the light emitting unit 2 is incident to the deflecting structure 411, the deflecting structure 411 can change the transmission direction of the light, so that the light emitted by the light emitting unit 2 can be emitted towards the direction right in front of the adjacent display device, the front view direction brightness is improved, and the light emitting effect and the display effect are improved.
When the display device is used, a side of the display device facing a user is a front side, and a side facing away from the user is a back side or a rear side.
In some alternative embodiments of the present invention, referring to fig. 1-4, the protection layer set comprises: a first protective layer 41 and a second protective layer 42. The first protection layer 41 is filled in the light emitting region 11 and covers the light emitting unit 2, for example, the first protection layer 41 is filled between the light emitting members 21 of the light emitting region 11 and on the outer peripheral side of the light emitting members 21 and covers the side of the light emitting unit 2 away from the substrate 1, and the side of the first protection layer 41 away from the substrate 1 is formed with the deflection structure 411, thereby facilitating the formation of the deflection structure 411. The deflecting structures 411 on the first protection layer 41 can be obtained by adjusting process parameters, for example, can be obtained by two-time deposition), and the first protection layer 41 can be a curable transparent resin layer, such as a urethane acrylate layer, an epoxy acrylate layer, and the like. The second protection layer 42 covers the first protection layer 41 and the retaining wall 3, the second protection layer 42 is located on a side of the first protection layer 41 away from the substrate 1, the second protection layer 42 is a transparent encapsulation layer, and for example, the second protection layer 42 may be a cured transparent resin layer.
In some alternative embodiments of the present invention, and with reference to fig. 1-4, the deflecting structure 411 is saw-toothed. Therefore, the deflection structure 411 is simple and convenient to form, and meanwhile, the effect of deflecting light to the right front can be guaranteed.
In some alternative embodiments of the present invention, referring to fig. 1 to 4, the backlight module 100 further includes an optical film material layer group 5, the optical film material layer group 5 may include a plurality of stacked optical film material layers 51, the optical film material layer group 5 is disposed on a side of the protection layer group away from the substrate 1, and the optical film material layer group 5 may have optical functions such as brightness enhancement, which may play a role in improving a display effect.
Referring to fig. 8, a part of the process flow of the backlight module 100 according to some embodiments of the present invention is briefly described, in which the backlight module 100 includes the substrate 1, the light emitting units 2, the dam walls 3, the first passivation layer 41, the second passivation layer 42, and the control circuit 12. The retaining wall 3 includes the first electrode layer 31, the second electrode layer 32, and the variable layer 33, wherein the variable layer 33 includes the electrolyte layer 332 and the counter electrode material layer 331.
The light emitting unit 2 may be prepared on the substrate 1, and the control circuit 12 for controlling the dam 3 may be added on the substrate 1. Then, a first protection layer 41 is deposited and is reserved for the retaining wall 3, a deflection structure 411 (obtained by two depositions through process parameter adjustment) is formed on the upper portion of the first protection layer 41, and the first protection layer 41 can be a curable transparent resin, such as a urethane acrylate layer, an epoxy acrylate layer, and the like. Next, a first electrode layer 31 and a second electrode layer 32 are deposited between the adjacent light emitting cells 2, the first electrode layer 31 and the second electrode layer 32 may be Indium Tin Oxide (ITO) thin films or fluorine doped tin oxide (FTO) thin films, and then a counter electrode material layer 331 is deposited, and the counter electrode material layer 331 may include tungsten oxide (WO)3) Cerium oxide (CeO)2) Titanium oxide (TiO)2) Nickel oxide (NiO), molybdenum oxide (MoO)3) Then, an electrolyte layer 332 is filled between the first electrode layer 31 and the counter electrode material layer 331, and the electrolyte layer 332 is an electrolyte solution layer. Wherein the solvent of the electrolyte solution layer can be propylene carbonate, ethylene glycol, etc., and silver nitrate (AgNO) is added into the solvent3) And lithium bromide (LiBr), silver nitrate (AgNO3) and lithium bromide (LiBr) are soluble and thereby ionized to silver ions (Ag)+) Bromine ion (Br)-) Lithium ion (Li)+) And nitrate ion (NO 3)-). Finally, a second protective layer 42 is deposited over the first protective layer 41 and the retaining wall 3, the second protective layer 42 being an encapsulation layer, the second protective layer 42 being a curable transparent layerA clear resin layer.
According to a second aspect of the invention, a display device includes: a liquid crystal panel and a backlight module 100, wherein the backlight module 100 is the backlight module 100 according to the above-mentioned first embodiment of the present invention, the backlight module 100 is disposed at the back side of the liquid crystal panel, and the backlight module 100 provides a light source for the liquid crystal panel.
According to the display device of the embodiment of the invention, by arranging the backlight module 100, the halo problem at the light and shade boundary when the backlight source is controlled in different regions can be improved under the condition of not influencing the normal light emitting effect, and higher brightness and contrast can be ensured.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A backlight module of a display device is characterized by comprising:
a substrate including a plurality of light emitting areas;
the light emitting units are respectively arranged in the light emitting areas, the number of the light emitting units is the same as that of the light emitting areas, the light emitting units correspond to the light emitting areas one by one, each light emitting unit comprises at least one light emitting piece, and each light emitting unit is independently controlled;
the barricade, the barricade is established just be located on the base plate and adjacent between the luminous zone, the barricade has first state and second state the barricade is in during the first state barricade permeable light the barricade is in during the second state, barricade reflective light.
2. The backlight module according to claim 1, wherein the dam is disposed between each two adjacent light emitting areas, and each dam is independently controlled.
3. The backlight module of claim 1, wherein the dam comprises a first electrode layer, a second electrode layer and a variable layer, the first electrode layer and the second electrode layer are transparent, the first electrode layer and the second electrode layer are opposite and spaced, the variable layer is disposed between the first electrode layer and the second electrode layer, the variable layer can transmit light when the dam is in the first state, and the variable layer can reflect light when the dam is in the second state.
4. The backlight module of claim 3, wherein the variable layer comprises a transparent electrolyte layer and a transparent counter electrode material layer, the counter electrode material layer is disposed on the second electrode layer, the electrolyte layer is disposed between the first electrode layer and the counter electrode material layer, when a voltage between the first electrode layer and the second electrode layer is a first voltage, the electrolyte layer separates out an opaque reflective layer, the reflective layer is disposed between the electrolyte layer and the first electrode layer, the reflective layer can reflect light, and the dam is in the second state; when the voltage between the first electrode layer and the second electrode layer is a second voltage, the reflecting layer is dissolved into the electrolyte layer, the retaining wall is in the first state, and the second voltage is different from the first voltage.
5. The backlight module according to claim 4, wherein the electrolyte layer is an electrolyte solution layer, the electrolyte layer comprises at least one metal ion, the reflective layer is a metal layer, and one of the metal ions is an ion of a metal contained in the reflective layer.
6. The backlight module of claim 1, wherein the control circuit of the dam is disposed on the substrate.
7. The backlight module according to any one of claims 1 to 6, comprising a transparent protection layer group, wherein at least a portion of the protection layer group fills the light emitting region and covers the light emitting unit, and a portion of the protection layer group opposite to the light emitting region is formed with a deflecting structure for deflecting light emitted from the light emitting unit toward a front direction adjacent to the display device.
8. The backlight module according to claim 7, wherein the protection layer group comprises:
the first protective layer is filled in the light emitting area and covers the light emitting units, and the deflection structure is formed on one side, far away from the substrate, of the first protective layer;
a second protective layer covering the first protective layer and the barrier wall.
9. The backlight module of claim 7, wherein the deflecting structure is zigzag.
10. A display device, comprising:
a liquid crystal panel;
a backlight module according to any one of claims 1 to 9, said backlight module being provided on a back side of said liquid crystal panel.
CN202011612409.0A 2020-12-30 2020-12-30 Backlight module of display device and display device Active CN112596304B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011612409.0A CN112596304B (en) 2020-12-30 2020-12-30 Backlight module of display device and display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011612409.0A CN112596304B (en) 2020-12-30 2020-12-30 Backlight module of display device and display device

Publications (2)

Publication Number Publication Date
CN112596304A true CN112596304A (en) 2021-04-02
CN112596304B CN112596304B (en) 2022-12-27

Family

ID=75206408

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011612409.0A Active CN112596304B (en) 2020-12-30 2020-12-30 Backlight module of display device and display device

Country Status (1)

Country Link
CN (1) CN112596304B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113759605A (en) * 2021-09-10 2021-12-07 昆山龙腾光电股份有限公司 Backlight module and display device thereof
CN114019713A (en) * 2021-06-16 2022-02-08 重庆康佳光电技术研究院有限公司 Light-emitting component, display screen and manufacturing method of light-emitting component
CN114089565A (en) * 2021-12-06 2022-02-25 武汉创维光显电子有限公司 Light emitting assembly and backlight module
CN114566092A (en) * 2022-03-10 2022-05-31 武汉华星光电技术有限公司 Backlight module and display device
CN115061314A (en) * 2022-06-28 2022-09-16 武汉华星光电技术有限公司 Backlight module, manufacturing method thereof and display device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003295234A (en) * 2002-04-01 2003-10-15 Toppan Printing Co Ltd Multi-color display panel and manufacturing method therefor
CN109116631A (en) * 2018-09-30 2019-01-01 厦门天马微电子有限公司 Backlight module, liquid crystal display die set and electronic equipment
CN110824771A (en) * 2019-11-12 2020-02-21 昆山龙腾光电股份有限公司 Display device and driving method thereof
CN210534493U (en) * 2019-11-13 2020-05-15 昆山龙腾光电股份有限公司 Display device
CN210666262U (en) * 2019-08-22 2020-06-02 昆山龙腾光电股份有限公司 Display panel and display device
CN111443524A (en) * 2020-04-15 2020-07-24 合肥京东方光电科技有限公司 Direct type backlight module and display device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003295234A (en) * 2002-04-01 2003-10-15 Toppan Printing Co Ltd Multi-color display panel and manufacturing method therefor
CN109116631A (en) * 2018-09-30 2019-01-01 厦门天马微电子有限公司 Backlight module, liquid crystal display die set and electronic equipment
CN210666262U (en) * 2019-08-22 2020-06-02 昆山龙腾光电股份有限公司 Display panel and display device
CN110824771A (en) * 2019-11-12 2020-02-21 昆山龙腾光电股份有限公司 Display device and driving method thereof
CN210534493U (en) * 2019-11-13 2020-05-15 昆山龙腾光电股份有限公司 Display device
CN111443524A (en) * 2020-04-15 2020-07-24 合肥京东方光电科技有限公司 Direct type backlight module and display device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114019713A (en) * 2021-06-16 2022-02-08 重庆康佳光电技术研究院有限公司 Light-emitting component, display screen and manufacturing method of light-emitting component
CN113759605A (en) * 2021-09-10 2021-12-07 昆山龙腾光电股份有限公司 Backlight module and display device thereof
CN113759605B (en) * 2021-09-10 2023-07-25 昆山龙腾光电股份有限公司 Backlight module and display device thereof
CN114089565A (en) * 2021-12-06 2022-02-25 武汉创维光显电子有限公司 Light emitting assembly and backlight module
CN114089565B (en) * 2021-12-06 2022-11-25 武汉创维光显电子有限公司 Light emitting assembly and backlight module
CN114566092A (en) * 2022-03-10 2022-05-31 武汉华星光电技术有限公司 Backlight module and display device
CN114566092B (en) * 2022-03-10 2024-03-08 武汉华星光电技术有限公司 Backlight module and display device
CN115061314A (en) * 2022-06-28 2022-09-16 武汉华星光电技术有限公司 Backlight module, manufacturing method thereof and display device

Also Published As

Publication number Publication date
CN112596304B (en) 2022-12-27

Similar Documents

Publication Publication Date Title
CN112596304B (en) Backlight module of display device and display device
CN106773379A (en) Display panel, display device and its control method
CN212873152U (en) Display panel and display device
CN109545833B (en) Display panel and terminal
CN112447931A (en) Display panel and display device
CN111882995B (en) Display panel and display device
US11409150B2 (en) Display device and shooting method of display device
CN110618557A (en) Display panel and display device
EP1484632A1 (en) Planar luminescent illumination device including auxiliary electrode
CN111243534B (en) Display panel, display device, control method thereof, and storage medium
CN113376901A (en) Display panel and electronic device
CN110646981A (en) Display device
US20190187530A1 (en) Blue Light-Blocking Structure and Manufacturing Method Thereof, Display Device and Operation Method Thereof
CN103926724A (en) TFT (thin film transistor)-driven display device
JP6807687B2 (en) Lighting device and liquid crystal display device
CN113176684A (en) Double-sided transparent display panel, display device and display panel preparation method
CN110297366A (en) A kind of display panel and driving method, display device and driving method
CN214623248U (en) Electrochromic device and electrochromic rear-view mirror comprising a display or a signal lamp
KR102469418B1 (en) Transparent display device and operation method of transparent display device
CN114678480A (en) Display panel and display device
KR20150102249A (en) Transparent display device and method of fabricating the same
CN114447067A (en) Display panel and display device thereof
CN209460542U (en) A kind of backlight assembly and liquid crystal display device
CN113238415A (en) Transparent display panel and display device
CN115718386B (en) Display module and display device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant