CN110596985A - Electrophoresis display device - Google Patents
Electrophoresis display device Download PDFInfo
- Publication number
- CN110596985A CN110596985A CN201910735029.7A CN201910735029A CN110596985A CN 110596985 A CN110596985 A CN 110596985A CN 201910735029 A CN201910735029 A CN 201910735029A CN 110596985 A CN110596985 A CN 110596985A
- Authority
- CN
- China
- Prior art keywords
- electrode
- charged particles
- transparent electrode
- voltage
- display device
- 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.)
- Pending
Links
- 238000001962 electrophoresis Methods 0.000 title claims abstract description 28
- 239000002245 particle Substances 0.000 claims abstract description 91
- 239000005357 flat glass Substances 0.000 claims abstract description 12
- 239000002904 solvent Substances 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 4
- 230000005684 electric field Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000004806 packaging method and process Methods 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000002310 reflectometry Methods 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- FWLHAQYOFMQTHQ-UHFFFAOYSA-N 2-N-[8-[[8-(4-aminoanilino)-10-phenylphenazin-10-ium-2-yl]amino]-10-phenylphenazin-10-ium-2-yl]-8-N,10-diphenylphenazin-10-ium-2,8-diamine hydroxy-oxido-dioxochromium Chemical compound O[Cr]([O-])(=O)=O.O[Cr]([O-])(=O)=O.O[Cr]([O-])(=O)=O.Nc1ccc(Nc2ccc3nc4ccc(Nc5ccc6nc7ccc(Nc8ccc9nc%10ccc(Nc%11ccccc%11)cc%10[n+](-c%10ccccc%10)c9c8)cc7[n+](-c7ccccc7)c6c5)cc4[n+](-c4ccccc4)c3c2)cc1 FWLHAQYOFMQTHQ-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229910019923 CrOx Inorganic materials 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- 229910015711 MoOx Inorganic materials 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229910003087 TiOx Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical group 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000767 polyaniline Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- HLLICFJUWSZHRJ-UHFFFAOYSA-N tioxidazole Chemical compound CCCOC1=CC=C2N=C(NC(=O)OC)SC2=C1 HLLICFJUWSZHRJ-UHFFFAOYSA-N 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
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
- G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
- G02F1/166—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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
- G02F1/167—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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
-
- 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
- G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
- G02F1/1675—Constructional details
- G02F1/16755—Substrates
-
- 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
- G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
- G02F1/1675—Constructional details
- G02F1/16756—Insulating layers
-
- 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
- G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
- G02F1/1675—Constructional details
- G02F1/1676—Electrodes
-
- 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
- G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
- G02F1/1675—Constructional details
- G02F1/1676—Electrodes
- G02F1/16762—Electrodes having three or more electrodes per pixel
-
- 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
- G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
- G02F1/1675—Constructional details
- G02F1/1679—Gaskets; Spacers; Sealing of cells; Filling or closing of cells
Abstract
The invention discloses an electrophoretic display device which comprises a CF plate, wherein a transparent electrode is arranged on the lower surface of the CF plate, an electrophoresis box is arranged below the transparent electrode, back plate glass is arranged below the electrophoresis box, and a fixed voltage is arranged on the transparent electrode. Because the lower surface of the CF plate is provided with the transparent electrode, and the transparent electrode is provided with the fixed voltage, the charged particle group is repelled by the voltage and moves to the space above the adjacent first electrode and the second electrode, the electric field intensity of the space is larger, and the binding force to the charged particle group is stronger. Because the charged particles are gathered near the first electrode and the second electrode, the requirements of the first electrode and the second electrode on the voltage are lower, the movement of the charged particles can be controlled without setting the voltage at 20V, and the switching between the bright state and the dark state can be easily realized; and because the charged particles are gathered near the first electrode and the second electrode, the thickness of the electrophoresis box can be made larger to load more charged particles, thereby avoiding light leakage.
Description
Technical Field
The invention relates to the technical field of display, in particular to an electrophoretic display device.
Background
Electrophoretic displays (Electrophoretic displays) have the advantages of low energy consumption, comfortable viewing and the like, and have wide application prospects in the Display fields of electronic tags, electronic billboards, electronic readers, wearable electronic devices and the like.
The electrophoretic display shown in fig. 1 includes a back plate glass 1 ', an electrophoretic cell and a front plate 2 ' sequentially stacked from bottom to top, a first electrode 3 ' and a second electrode 4 ' are disposed inside the electrophoretic cell, a pixel wall 5 ' provided with an isolation pixel in the electrophoretic cell is filled with charged particles 6 ' and an insulating liquid 7 ', and the movement of the charged particles 6 ' is realized by setting different voltage differences between the first electrode 3 ' and the second electrode 4 ' and adjusting the voltage of the second electrode 4 ', so as to realize the reflection and shielding of light.
In addition, when the box thickness of the electrophoresis box exceeds 6 μm, the charged particles 6 'at the position far away from the electrode of the TFT backboard glass 1' are subjected to small constraint force, so that the switching speed of a bright state and a dark state, namely the response speed, is reduced, and the requirement on the driving voltage is increased; when the cell thickness is less than 3 μm, the number of charged particles 6 'is insufficient to effectively cover the second electrode 4', causing local light leakage in a dark state. So the box thickness of the current electrophoresis box after encapsulation is 3-6 μm. But such a thickness of the electrophoretic cell encapsulated charged particles 6 'may still lead to light leakage due to insufficient concentration of locally charged particles 6'.
Disclosure of Invention
The invention provides an electrophoretic display device, wherein a transparent electrode is arranged on the lower surface of a CF plate, and the transparent electrode is provided with a fixed voltage, when the display operates if charged particles are positively charged, the transparent electrode on the CF plate always applies a larger fixed positive potential, the charged particle group is repelled by the voltage and moves to a space above a first electrode and a second electrode, the electric field intensity of the space is larger, the binding force on the charged particle group is stronger, and the situation is similar if the charged particles are negatively charged. Because the charged particles are gathered near the first electrode and the second electrode, the requirements of the first electrode and the second electrode on the voltage are lower, the movement of the charged particles can be controlled without setting the voltage at 20V, and the switching between the bright state and the dark state can be easily realized; and because the charged particles are gathered near the first electrode and the second electrode, the thickness of the electrophoresis box can be made larger to load more charged particles, thereby avoiding light leakage caused by insufficient concentration of the charged particles. Meanwhile, the transparent electrode is provided with fixed voltage to play a role of electromagnetic shielding.
The technical problem to be solved by the invention is realized by the following technical scheme:
in order to solve the technical problem, the invention provides an electrophoretic display device which comprises a CF plate, wherein a transparent electrode is arranged on the lower surface of the CF plate, an electrophoresis box is arranged below the transparent electrode, back plate glass is arranged below the electrophoresis box, and the transparent electrode is provided with fixed voltage.
Furthermore, a pixel wall is arranged in the electrophoresis box and is arranged between the back plate glass and the transparent electrode.
Furthermore, one end of the pixel wall is abutted to the back plate glass, and a distance is kept between the other end of the pixel wall and the transparent electrode.
Further, the height of the pixel wall is 1/3-2/3 of the box thickness of the electrophoresis box.
Further, an electrode insulating layer is arranged on the lower surface of the transparent electrode.
Further, the shape of the transparent electrode is a strip or a grid.
Furthermore, a first electrode and a second electrode are arranged in the electrophoresis box, the voltage of the first electrode is U, the voltage of the second electrode is 0V or 2U, and the voltage of the transparent electrode is more than 2U.
Further, the voltage U of the first electrode is 3V-8V.
Further, the thickness of the electrophoresis cassette is greater than 6 μm.
Furthermore, a solvent and charged particles are packaged in the electrophoresis box, and the charged particles are black charged particles or reflective particles.
The invention has the following beneficial effects:
because the transparent electrode is arranged on the lower surface of the CF plate and provided with a fixed voltage, when the display operates if the charged particles are positively charged, the transparent electrode on the CF plate always applies a larger fixed positive potential, the charged particle group is repelled by the voltage and moves to the space above the adjacent first electrode and the second electrode, the electric field intensity at the space is larger, the binding force on the charged particle group is stronger, and the situation is similar if the charged particles are negatively charged. Because the charged particles are gathered near the first electrode and the second electrode, the requirements of the first electrode and the second electrode on the voltage are lower, the movement of the charged particles can be controlled without setting the voltage at 20V, and the switching between the bright state and the dark state can be easily realized; and because the charged particles are gathered near the first electrode and the second electrode, the thickness of the electrophoresis box can be made larger to load more charged particles, thereby avoiding light leakage caused by insufficient concentration of the charged particles. Meanwhile, the transparent electrode is provided with fixed voltage to play a role of electromagnetic shielding.
One end of the pixel wall is abutted to the back plate glass, and a distance is kept between the other end of the pixel wall and the transparent electrode. Because the charged particles are gathered near the first electrode and the second electrode, the upper end of the pixel wall does not need to be abutted to the transparent electrode or even the CF plate, the charged particles in the pixel wall cannot escape to the adjacent pixels, and the operation between the adjacent pixels is still independent, so that the height of the pixel wall can be reduced, and the reduction of the height of the pixel wall is beneficial to increasing the visual angle of the display.
The height of the pixel wall is 1/3-2/3 of the box thickness of the electrophoresis box, if the height of the pixel wall is higher, the ODF packaging method or the single CELL solution filling method is not favorable for packaging, the mass production difficulty is larger, and the production cost is high. Due to the fact that the structure can reduce the height of the pixel wall, when the thickness of the box is 8 micrometers, for example, the height of the pixel wall is 4 micrometers, the height is beneficial to package by adopting an ODF packaging method or a single CELL solution filling method, mass production feasibility is achieved, and production cost is greatly reduced.
The pixel walls provided with the gaps may amplify the settling problem caused by the high density of charged particles. The charged particles can be always suspended in the solvent by wrapping the charged particles with a resin material having a relatively low density or by using a solvent having a high-density component so that the average density of the charged particles is close to that of the solvent. Charged particles are prevented from escaping to adjacent pixels through the gaps of the pixel walls when not powered, such as during transportation and when the display is tilted or erected.
The lower surface of the transparent electrode is provided with an electrode insulating layer. To prevent charged particles from adhering to the surface of the transparent electrode or from being injected into the transparent electrode.
Drawings
Fig. 1 is a schematic structural diagram of a conventional electrophoretic display device.
Fig. 2 is a schematic structural diagram of an electrophoretic display device according to the present invention.
Fig. 3 is a schematic structural diagram of another electrophoretic display device according to the present invention.
Detailed Description
The present invention will be described in detail with reference to examples, which are only preferred embodiments of the present invention and are not intended to limit the present invention.
Referring to fig. 2, an electrophoretic display device provided by the present invention includes a CF plate 1, a transparent electrode 2 is disposed on a lower surface of the CF plate 1, an electrophoresis box 3 is disposed below the transparent electrode 2, a back plate glass 4 is disposed below the electrophoresis box 3, and the transparent electrode 2 is provided with a fixed voltage. The electrophoresis cartridge 3 comprises a first insulating layer 31, a first electrode 32, a second electrode 33 and a second insulating layer 34, wherein the first electrode 32 is a Vcom electrode, the second electrode 33 is a pixel electrode, the first insulating layer 31 is arranged on the upper surface of the back plate glass 4, the first electrode 32 and the second electrode 33 are both arranged above the first insulating layer 31, the second insulating layer 34 is arranged right below the second electrode 33, a pixel wall 35 is arranged on the outer side of the upper surface of the back plate glass 4, and a space formed between the CF plate 1 and the back plate glass 4 is sealed with a solvent 36 and charged particles 37; the CF plate 1 includes an OC layer 11, a light-transmitting layer 12, and a front plate 13, which are sequentially stacked from bottom to top, where the light-transmitting layer 12 includes a BM edge and an opening area, the BM edge is located right above the first electrode 32, and the opening area is located right above the second electrode 33. Since the transparent electrode 2 is disposed on the lower surface of the CF plate 1, and the transparent electrode 2 is set with a fixed voltage, when the display operates, the transparent electrode 2 on the CF plate 1 always applies a large fixed positive potential, the charged particles 37 move to the space above the first electrode 32 and the second electrode 33 due to the repulsion of the voltage, the electric field intensity in the space is large, the binding force on the charged particles 37 is strong, and the situation is similar if the charged particles 37 are negatively charged. Since the charged particles 37 are gathered near the first electrode 32 and the second electrode 33, the requirements of the first electrode 32 and the second electrode 33 on voltage are low, the movement of the charged particles 37 can be controlled without setting at 20V, and the switching between the bright state and the dark state can be easily realized; and since the charged particles 37 are homopolymerized and collected near the first electrode 32 and the second electrode 33, the thickness of the electrophoresis cartridge 3 can be made larger to load more charged particles 37, thereby avoiding light leakage caused by insufficient concentration of the charged particles 37. Meanwhile, the transparent electrode 2 is provided with a fixed voltage to play a role of electromagnetic shielding.
Further, a pixel wall 35 is arranged in the electrophoresis box 3, and the pixel wall 35 is arranged between the back plate glass 4 and the transparent electrode 2. The pixel walls 35 are used to isolate the pixels, so that each pixel operates independently, and the electric fields of the adjacent pixels are prevented from interfering with each other.
Further, one end of the pixel wall 35 abuts against the back glass 4 to form a closed loop to surround the second electrode 33, or may be disposed above the first electrode 32 to form a closed loop to surround the second electrode 33, and a gap is maintained between the other end of the pixel wall and the transparent electrode 2. Since the charged particles 37 are gathered near the first electrode 32 and the second electrode 33, the upper end of the pixel wall 35 does not need to abut against the transparent electrode 2 or even the CF plate 1, the charged particles 37 inside do not escape to the adjacent pixels, and the operation between the adjacent pixels is still independent, so the height of the pixel wall 35 can be made lower, and the reduction of the height of the pixel wall 35 is beneficial to increasing the viewing angle of the display.
Further, the height of the pixel wall 35 is 1/3-2/3 of the thickness of the electrophoresis box 3, and if the height of the pixel wall 35 is high, the ODF packaging method or the single CELL solution filling method is not adopted for packaging, so that the difficulty of mass production is high, and the production cost is high. Due to the structure, the height of the pixel wall 35 can be reduced, and when the thickness of the box is 8 micrometers, for example, the height of the pixel wall 35 is 4 micrometers, the height is favorable for packaging by adopting an ODF packaging or single CELL filling solution method, the mass production feasibility is realized, and the production cost is greatly reduced.
It should be noted that the pixel walls 35 with the gaps may amplify the deposition problem caused by the high density of the charged particles 37. It is possible to keep the charged particles suspended in the solvent 36 at all times by wrapping the charged particles 37 with a resin material of lower density or by using the solvent 36 of a high-density component so that the average density of the charged particles 37 is close to that of the solvent 36. Charged particles are prevented from escaping through the gaps of the pixel walls 35 to adjacent pixels when not powered, such as during transportation and when the display is tilted or set up.
Further, the lower surface of the transparent electrode 2 is provided with an electrode insulating layer 5. To prevent the charged particles 37 from adhering to the surface of the transparent electrode 2 or from being injected into the transparent electrode 2.
Further, a first electrode 32 and a second electrode 33 are further arranged in the electrophoresis box 3, the voltage of the first electrode 32 is U, the voltage of the second electrode 33 is 0V or 2U, and the voltage of the transparent electrode 2 is greater than 2U. If the charged particles 37 are positively charged and black, when the potential of the second electrode 33 is 0, the charged particles 37 are driven to cover the second electrode 33, corresponding to an off state; when the potential of the first electrode 32 is 2U, the charged particles 37 leave the second electrode 33, corresponding to an on-state. The voltage of the transparent electrode 2 is greater than that of the second electrode 33 so that the movement locus of the charged particles 37 is controlled.
Further, the voltage U of the first electrode 32 is 3V-8V, and the reduction of the driving voltage is easier to realize, so that the device is easier to realize mass production.
Further, the thickness of the electrophoretic cell 3 is greater than 6 μm, and a thicker electrophoretic cell 3 can encapsulate more charged particles 37, further reducing the probability of light leakage.
Further, the electrophoresis cartridge 3 encloses a solvent 36 and charged particles 37, and the charged particles 37 may be positively or negatively charged. The charged particles 37 may be black charged particles 37 or may be reflective particles. When the charged particles 37 are black charged particles, they are obtained by coating black particles of TiOx, carbon black, aniline black, etc. with a transparent resin material, which may be polyethylene, polystyrene, polyacrylate, polyester, etc. The resin spheres coated with black band particles are referred to as particle spheres, the diameter of the particle spheres is preferably less than 0.5 μm, and the size of the black charged particles within the particle spheres is sufficiently small, preferably less than 0.1 μm, such as 20nm to 50 nm. Since the finer particles contribute to the improvement of the light-shielding property. In addition, a plurality of black particles can be uniformly dispersed in the particle ball. The solvent 36 is a transparent insulating organic solvent 36, and the main component is a hydrocarbon-based organic solvent 36 such as benzene, toluene, xylene, or cyclohexane. The solvent 36 further contains a dispersant, a surfactant, a decomposition stabilizer, a light stabilizer, a charge control agent, a low-volatile component, and the like. When the charged particles 37 are reflective particles, they may be Ag, Al particles, and the reflective particles move on the first and second electrodes 32, 33 to achieve the off-state and on-state of the pixel. The second electrode 33 is required to be an ultra-low reflectivity electrode, the reflectivity of which is less than 5%, and the second electrode can be made of a structure of Mo/MoOx or Cr/CrOx, a metal/black insulating layer, a conductive oxide/black insulating layer, or the like.
The second electrode 33 can be made of a metal material with high reflectivity, such as Al or Ag, with a thickness of 500 Å -5000 Å, and a reflectivity greater than 90% in the visible light range, the first electrode 32 can be made of a metal commonly used in the TFT-LCD industry, such as Mo, Mo/Al/Mo, Cr, Cu, Ag, or an alloy thereof, because a voltage difference is provided between the first electrode 32 and the second electrode 33, the charged particles 37 will move from one electrode to the other under the driving of an electric field, when a large number of groups of charged particles 37 cover the second electrode 33, the pixels do not reflect light, a dark state is realized, when a large number of groups of charged particles 37 leave the second electrode 33 and cover the first electrode 32, the pixels reflect light, a bright state is realized, and the light source can be natural light or an artificial light source such as an LED or an incandescent lamp.
Referring to fig. 3, further, the transparent electrode 2 is in the shape of a strip or a grid. Which reduces the absorption of the reflected light by the transparent electrode 2 and thus increases the contrast of the display.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (10)
1. The electrophoresis display device is characterized by comprising a CF plate, wherein a transparent electrode is arranged on the lower surface of the CF plate, an electrophoresis box is arranged below the transparent electrode, back plate glass is arranged below the electrophoresis box, and the transparent electrode is provided with fixed voltage.
2. An electrophoretic display device as claimed in claim 1, wherein a pixel wall is provided in the electrophoretic cell, and the pixel wall is provided between the backplane glass and the transparent electrode.
3. An electrophoretic display device as claimed in claim 2, wherein one end of the pixel wall abuts against the backplane glass, and the other end of the pixel wall is spaced apart from the transparent electrode.
4. An electrophoretic display device as claimed in claim 3, characterized in that the height of the pixel wall is 1/3-2/3 of the box thickness of the electrophoretic cell.
5. An electrophoretic display device as claimed in claim 1, characterized in that the lower surface of the transparent electrode is provided with an electrode insulating layer.
6. An electrophoretic display device as claimed in claim 1, wherein the transparent electrode is in the shape of a strip or a grid.
7. The electrophoretic display device according to claim 1, wherein a first electrode and a second electrode are further disposed in the electrophoretic cartridge, the voltage of the first electrode is U, the voltage of the second electrode is 0V or 2U, and the voltage of the transparent electrode is greater than 2U.
8. Electrophoretic display device according to claim 7, wherein the voltage U of the first electrode is 3V-8V.
9. Electrophoretic display device according to claim 1, characterised in that the thickness of the electrophoretic cell is larger than 6 μm.
10. The electrophoretic display device according to claim 1, wherein the electrophoretic cartridge contains a solvent and charged particles, and the charged particles are black charged particles or reflective particles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910735029.7A CN110596985A (en) | 2019-08-09 | 2019-08-09 | Electrophoresis display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910735029.7A CN110596985A (en) | 2019-08-09 | 2019-08-09 | Electrophoresis display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110596985A true CN110596985A (en) | 2019-12-20 |
Family
ID=68853801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910735029.7A Pending CN110596985A (en) | 2019-08-09 | 2019-08-09 | Electrophoresis display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110596985A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116699918A (en) * | 2022-02-25 | 2023-09-05 | 荣耀终端有限公司 | Array substrate, display device and electronic equipment |
| CN116699918B (en) * | 2022-02-25 | 2024-05-17 | 荣耀终端有限公司 | Array substrate, display device and electronic equipment |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030048521A1 (en) * | 2001-09-12 | 2003-03-13 | Canon Kabushiki Kaisha | Electrophoretic display device |
| US20030214479A1 (en) * | 2002-05-13 | 2003-11-20 | Canon Kabushiki Kaisha | Display device employing electrophoretic migration |
| JP2007065288A (en) * | 2005-08-31 | 2007-03-15 | Mitsubishi Pencil Co Ltd | Electrophoretic display medium |
| JP2007127676A (en) * | 2005-10-31 | 2007-05-24 | Canon Inc | Particle movement type display device, and driving method therefor |
| US20080024425A1 (en) * | 2004-06-08 | 2008-01-31 | Shunichi Shido | Particle Movement-Type Display Apparatus and Driving Method Thereof |
| CN102636932A (en) * | 2011-02-09 | 2012-08-15 | 精工爱普生株式会社 | Electrophoretic display sheet and manufacturing method therefor |
| CN103186005A (en) * | 2011-12-27 | 2013-07-03 | 上海天马微电子有限公司 | Color electronic paper device |
| CN105589252A (en) * | 2016-03-11 | 2016-05-18 | 京东方科技集团股份有限公司 | Light valve element and control method thereof and display device |
| CN107193170A (en) * | 2017-07-19 | 2017-09-22 | 昆山龙腾光电有限公司 | Display device and color display method |
-
2019
- 2019-08-09 CN CN201910735029.7A patent/CN110596985A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030048521A1 (en) * | 2001-09-12 | 2003-03-13 | Canon Kabushiki Kaisha | Electrophoretic display device |
| US20030214479A1 (en) * | 2002-05-13 | 2003-11-20 | Canon Kabushiki Kaisha | Display device employing electrophoretic migration |
| US20080024425A1 (en) * | 2004-06-08 | 2008-01-31 | Shunichi Shido | Particle Movement-Type Display Apparatus and Driving Method Thereof |
| JP2007065288A (en) * | 2005-08-31 | 2007-03-15 | Mitsubishi Pencil Co Ltd | Electrophoretic display medium |
| JP2007127676A (en) * | 2005-10-31 | 2007-05-24 | Canon Inc | Particle movement type display device, and driving method therefor |
| CN102636932A (en) * | 2011-02-09 | 2012-08-15 | 精工爱普生株式会社 | Electrophoretic display sheet and manufacturing method therefor |
| CN103186005A (en) * | 2011-12-27 | 2013-07-03 | 上海天马微电子有限公司 | Color electronic paper device |
| CN105589252A (en) * | 2016-03-11 | 2016-05-18 | 京东方科技集团股份有限公司 | Light valve element and control method thereof and display device |
| CN107193170A (en) * | 2017-07-19 | 2017-09-22 | 昆山龙腾光电有限公司 | Display device and color display method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116699918A (en) * | 2022-02-25 | 2023-09-05 | 荣耀终端有限公司 | Array substrate, display device and electronic equipment |
| CN116699918B (en) * | 2022-02-25 | 2024-05-17 | 荣耀终端有限公司 | Array substrate, display device and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7411721B2 (en) | Particle movement-type display device and particle movement-type display apparatus | |
| Amundson | Electrophoretic imaging films for electronic paper displays | |
| RU2676394C2 (en) | Two particle total internal reflection image display | |
| WO2011058725A1 (en) | Display device and method of manufacture thereof | |
| JP4755885B2 (en) | Electrophoretic display element, electrophoretic display device, colored electrophoretic fine particles, insulating liquid, and electrophoretic display element driving method | |
| US20060007529A1 (en) | Electrophoretic display apparatus | |
| CN110520791B (en) | Display substrate, driving method thereof and display device | |
| US20130050806A1 (en) | Electrophoresis device, method of manufacturing the electrophoresis device, display, display substrate, and electronic unit | |
| CN101650894B (en) | Flexible display panel and manufacturing method thereof | |
| US20090322670A1 (en) | Color bistable display | |
| CN109656076B (en) | Electrophoretic display device, driving method thereof and electrophoretic display device | |
| US11774827B2 (en) | Reflective microcells for electrophoretic displays and methods of making the same | |
| CN110596985A (en) | Electrophoresis display device | |
| WO2017159075A1 (en) | Reflective display device and electronic device | |
| US9207447B2 (en) | Cell driven by electric field and operation method thereof | |
| CN108681179A (en) | Electronic paper | |
| CN106293224B (en) | A kind of hand-written electric paper and preparation method thereof, hand-written electric paper device | |
| CN101876771A (en) | Display device | |
| JP5336542B2 (en) | Electrophoretic display element, electrophoretic display device, colored electrophoretic fine particles, insulating liquid, and electrophoretic display element driving method | |
| WO2015145965A1 (en) | Display unit and electronic apparatus | |
| KR20080003115A (en) | Electronic paper display | |
| CN110488552A (en) | A kind of electrophoretic display apparatus | |
| KR20110074144A (en) | A electrophoretic light converting particle and electrophoretic display device having the same | |
| KR101140006B1 (en) | Electronic Paper Display Device | |
| EP4261607A1 (en) | Electronic ink display panel and manufacturing method therefor, and electronic 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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191220 |
|
| RJ01 | Rejection of invention patent application after publication |