CN107193170B - Display device and color display method - Google Patents
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- CN107193170B CN107193170B CN201710589155.7A CN201710589155A CN107193170B CN 107193170 B CN107193170 B CN 107193170B CN 201710589155 A CN201710589155 A CN 201710589155A CN 107193170 B CN107193170 B CN 107193170B
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- G—PHYSICS
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- 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
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
- G09G3/344—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
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Abstract
A display device comprises a first substrate, a second substrate and electronic paper, wherein the second substrate is arranged opposite to the first substrate; the electronic paper is arranged between the first substrate and the second substrate and comprises a plurality of pixels, each pixel comprises a plurality of sub-pixels, partition plates are arranged on the periphery in each sub-pixel, an area defined by the partition plates is provided with electrophoretic liquid, red charged particles, green charged particles and blue charged particles, the charge-to-mass ratio of the red charged particles is smaller than that of the green charged particles, the charge-to-mass ratio of the green charged particles is smaller than that of the blue charged particles, an electric field for driving the charged particles to move can be generated between the first substrate and the second substrate, target charged particles are driven to move to the first substrate, an electric field for driving the charged particles to move can be generated between the oppositely arranged partition plates, and non-target charged particles are driven to move to the partition plates. The display device can avoid the influence of non-target charged particles on a display picture, so that the picture has pure color. The invention also relates to a color display method.
Description
Technical Field
The present invention relates to the field of electrophoretic display technologies, and in particular, to a display device and a color display method.
Background
Electrophoretic displays have become an important flat panel display due to their advantages of low power consumption and high contrast ratio, and are increasingly widely used in various display fields.
The electrophoretic display achieves the display of a picture by controlling the movement of charged color particles (charged pigment particles) in an electrophoretic fluid (electrophoretic fluid) in each pixel. When the electrophoretic display displays pictures, the electrophoresis of the target charged particles moves to the display area, the non-target charged particles stay in the dark area, and the external environment light penetrates through the display screen and is reflected by the target charged particles in the display area, so that the picture display can be realized.
However, part of the external environment light still enters the dark area and is reflected out of the display screen by the non-target charged particles in the dark area, and the part of the light can affect the display picture, so that the displayed picture is impure in color, and the picture display quality is reduced.
Disclosure of Invention
The present invention provides a display device, which can control the driving voltage to realize color image display, and at the same time, the partition board generates an electric field to drive the non-target charged particles to move to the partition board, so as to avoid the influence of the non-target charged particles on the display image, and make the image color more pure.
The technical problem to be solved by the invention is realized by adopting the following technical scheme.
A display device comprises a first substrate, a second substrate and electronic paper, wherein the second substrate is arranged opposite to the first substrate; the electronic paper is arranged between the first substrate and the second substrate and comprises a plurality of pixels, each pixel comprises a plurality of sub-pixels, partition plates are arranged on the periphery in each sub-pixel, an area defined by the partition plates is provided with electrophoretic liquid, red charged particles, green charged particles and blue charged particles, the charge-to-mass ratio of the red charged particles is smaller than that of the green charged particles, the charge-to-mass ratio of the green charged particles is smaller than that of the blue charged particles, an electric field for driving the charged particles to move can be generated between the first substrate and the second substrate, target charged particles are driven to move to the first substrate, an electric field for driving the charged particles to move can be generated between the oppositely arranged partition plates, and non-target charged particles are driven to move to the partition plates.
In a preferred embodiment of the present invention, the first substrate includes a common electrode, the second substrate includes a pixel electrode, and an electric field for driving the charged particles to move is generated between the common electrode and the pixel electrode; the second substrate further comprises a plurality of scanning lines and a plurality of data lines, and the sub-pixels of each pixel are defined by the plurality of scanning lines and the plurality of data lines in a mutually crossed mode.
In a preferred embodiment of the invention, the second substrate further includes a second bottom plate, and a gate, a gate insulating layer, a semiconductor layer, a source, a drain, a second insulating layer and a third insulating layer sequentially disposed on the second bottom plate, the pixel electrode is disposed between the second insulating layer and the third insulating layer, the second insulating layer is provided with a through hole for leaking the drain, the pixel electrode passes through the through hole and is electrically connected to the drain, the gate is electrically connected to the scan line, and the source is electrically connected to the data line.
In a preferred embodiment of the present invention, the second substrate further includes a light-reflecting layer disposed on the third insulating layer.
In a preferred embodiment of the present invention, the area of the sub-pixel close to the first substrate is a display area, the area of the sub-pixel close to the second substrate is a dark area, the partition is provided with an adsorption electrode, and an electric field for driving the charged particles to move is generated between the adsorption electrodes arranged oppositely to drive the charged particles in the dark area to move to the partition.
In a preferred embodiment of the present invention, the first substrate is provided with a color film layer, the color film layer includes a red photoresist layer, a green photoresist layer and a blue photoresist layer, the red photoresist layer, the green photoresist layer and the blue photoresist layer are respectively disposed corresponding to the sub-pixels, and white charged particles are further disposed in an area surrounded by the partition board, and charge attributes of the white charged particles are different from those of the red charged particles, the green charged particles and the blue charged particles.
Another objective of the present invention is to provide a color display method, which can control the driving voltage to realize color image display, and the partition board generates an electric field to drive the non-target charged particles to move to the partition board, so as to avoid the influence of the non-target charged particles on the display image, and make the image color more pure.
A color display method, the steps of the color display method comprising:
providing a first substrate;
providing a second substrate, and enabling the first substrate and the second substrate to be oppositely arranged;
providing electronic paper, and arranging the electronic paper between a first substrate and a second substrate, wherein the electronic paper comprises a plurality of pixels, each pixel comprises a plurality of sub-pixels, partition plates are arranged on the periphery in each sub-pixel, an electrophoretic liquid, red charged particles, green charged particles and blue charged particles are arranged in an area surrounded by the partition plates, the charge-to-mass ratio of the red charged particles is smaller than that of the green charged particles, and the charge-to-mass ratio of the green charged particles is smaller than that of the blue charged particles; an electric field for driving the charged particles to move is generated between the first substrate and the second substrate, the target charged particles are driven to move to the first substrate, and an electric field for driving the charged particles to move is generated between the oppositely arranged clapboards, so that the non-target charged particles are driven to move to the clapboards.
In a preferred embodiment of the present invention, a region of the sub-pixel close to the first substrate is a display region, a region of the sub-pixel close to the second substrate is a dark region, and the partition has an absorption electrode, and the color display method for displaying red color includes:
driving the red charged particles, the green charged particles and the blue charged particles to move to the first substrate;
driving the red charged particles, the green charged particles and the blue charged particles to move towards a direction close to the second substrate, and when the green charged particles and the blue charged particles move to the dark area, the red charged particles are in the display area and display red;
and generating an electric field for driving the charged particles to move by using the adsorption electrode, and driving the green charged particles and the blue charged particles to move to the partition plate.
In a preferred embodiment of the present invention, the step of displaying green color by the color display method includes:
driving the red charged particles, the green charged particles and the blue charged particles to move to the second substrate;
driving the red charged particles, the green charged particles and the blue charged particles to move towards a direction close to the first substrate, wherein when the green charged particles and the blue charged particles move to the display area, the red charged particles are in a dark area;
driving the green charged particles and the blue charged particles to move towards a direction close to the second substrate, and when the blue charged particles move to the dark area, the green charged particles are in the display area and display green;
and generating an electric field for driving the charged particles to move by using the adsorption electrode, and driving the red charged particles and the blue charged particles to move to the partition plate.
In a preferred embodiment of the present invention, the step of displaying blue color by the color display method includes:
driving the red charged particles, the green charged particles and the blue charged particles to move to the second substrate;
driving the red charged particles, the green charged particles and the blue charged particles to move towards a direction close to the first substrate, and when the green charged particles and the red charged particles are in the dark region, the blue charged particles move into the display region and display blue;
and generating an electric field for driving the charged particles to move by using the adsorption electrode, and driving the red charged particles and the green charged particles to move to the partition plate.
The first substrate and the second substrate of the display device are arranged oppositely, the electronic paper is arranged between the first substrate and the second substrate and comprises a plurality of pixels, each pixel comprises a plurality of sub-pixels, partition plates are arranged on the periphery in each sub-pixel, an electrophoretic liquid, red charged particles, green charged particles and blue charged particles are arranged in an area defined by the partition plates, the charge-to-mass ratio of the red charged particles is smaller than that of the green charged particles, the charge-to-mass ratio of the green charged particles is smaller than that of the blue charged particles, an electric field for driving the charged particles to move can be generated between the first substrate and the second substrate, target charged particles are driven to move to the first substrate, an electric field for driving the charged particles to move can be generated between the oppositely arranged partition plates, and non-target charged particles are driven to move to the partition plates. The display device can utilize the difference of the moving speeds of the red charged particles, the green charged particles and the blue charged particles, realize the display of a color picture through the control of the driving voltage, and simultaneously, the partition board generates an electric field for driving the charged particles to move so as to drive the non-target charged particles to move to the partition board, thereby avoiding the influence of the non-target charged particles on the display picture and ensuring that the picture color is cleaner.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are specifically described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of a single pixel of a display device according to a first embodiment of the present invention.
Fig. 2 is a circuit diagram of the second substrate according to the first embodiment of the invention.
Fig. 3 is a schematic structural diagram of a single pixel of a display device according to a second embodiment of the present invention.
Fig. 4a to 4d are schematic diagrams illustrating a process of displaying red color by the color display method of the present invention.
Fig. 5 is a schematic diagram of driving waveforms in the process of displaying red color according to the present invention.
Fig. 6a to 6d are schematic diagrams illustrating a process of displaying green color by the color display method of the present invention.
Fig. 7 is a schematic diagram of driving waveforms in the process of displaying green color according to the present invention.
Fig. 8a to 8c are schematic diagrams illustrating a process of displaying red color by the color display method of the present invention.
Fig. 9 is a schematic diagram of driving waveforms in the process of displaying blue color according to the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the display device and the color display method according to the present invention with reference to the accompanying drawings and preferred embodiments is as follows:
the foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of preferred embodiments, which is to be read in connection with the accompanying drawings. While the present invention has been described in connection with the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications, equivalent arrangements, and specific embodiments thereof.
Fig. 1 is a schematic structural diagram of a single pixel of a display device according to a first embodiment of the present invention. As shown in fig. 1, in the present embodiment, the display device 10 includes a first substrate 12, a second substrate 13, and an electronic paper 14, wherein the first substrate 12 is disposed opposite to the second substrate 13, and the electronic paper 14 is disposed between the first substrate 12 and the second substrate 13.
As shown in fig. 1, the first substrate 12 includes a first base plate 122, a common electrode 123, and a first insulating layer 124. The first bottom plate 122 is made of a transparent material, such as glass, but not limited thereto. The common electrode 123 is disposed on the first base substrate 122, and the first insulating layer 124 covers the common electrode 123. In the present embodiment, the common electrode 123 is made of ITO material, i.e. the first substrate 12 is transparent to light.
Fig. 2 is a circuit diagram of the second substrate according to the first embodiment of the invention. As shown in fig. 1 and 2, the second substrate 13 further includes a plurality of scan lines 131 and a plurality of data lines 132. The scan lines 131 are spaced apart from each other, and the data lines 132 are spaced apart from each other and intersect the scan lines 131 to define a plurality of regions arranged in a matrix. In this embodiment, the second substrate 13 further includes a second base plate 133, and a gate electrode (not shown), a gate insulating layer (not shown), a semiconductor layer (not shown), a source electrode (not shown), a drain electrode (not shown), a second insulating layer 134, a pixel electrode 135, a third insulating layer 136, and a light reflecting layer 137 sequentially disposed on the second base plate 133. The pixel electrode 135 is disposed between the second insulating layer 134 and the third insulating layer 136, the reflective layer 137 is disposed on the third insulating layer 136, the second insulating layer 134 is provided with a through hole exposing the drain, and the pixel electrode 135 penetrates through the through hole and is electrically connected to the drain. The gate is electrically connected to the scan line 131, and the source is electrically connected to the data line 132, wherein the gate, the source and the drain form a thin film transistor switch 138. The light reflecting layer 137 reflects light passing through the first substrate 12 toward the second substrate 13. In the embodiment, a driving electric field can be generated between the common electrode 123 of the first substrate 12 and the pixel electrode 135 of the second substrate 13 to drive the target charged particles to move to the first substrate 12, so as to achieve the target color display.
Two sides of the electronic paper 14 are respectively located between the first insulating layer 124 of the first substrate 12 and the reflective layer 137 of the second substrate 13. The electronic paper 14 includes a plurality of pixels 101, each pixel 101 includes a plurality of sub-pixels 101a, and preferably, each pixel 101 includes three sub-pixels 101a, but not limited thereto. The sub-pixel 101a of each pixel 101 is defined by a plurality of scan lines 131 and a plurality of data lines 132 intersecting each other. The periphery of each sub-pixel 101a is provided with a partition 141, and two adjacent sub-pixels 101a share one partition 141. The partitions 141 of the sub-pixel 101a are joined to form a rectangular frame, and a box-shaped accommodating cavity is formed between the rectangular frame and the first and second substrates 12 and 13. In this embodiment, since the sub-pixel 101a is used for displaying by reflecting external ambient light, the pixel electrode 135 needs to be made of a non-transparent conductive material, for example, the pixel electrode 135 is made of a ferrous metal, but not limited thereto.
It should be noted that an electric field for driving the charged particles to move may be generated between the oppositely disposed partition plates 141, so as to drive the non-target charged particles to move to the partition plates 141, thereby avoiding the influence of the non-target charged particles on the display screen, and making the screen color purer. In this embodiment, the partition plates 141 are provided with the adsorption electrodes 141a, and only two partition plates 141 that are disposed opposite to each other are provided with the adsorption electrodes 141a, so that an electric field for driving the charged particles to move can be generated between the two adsorption electrodes 141a, and the non-target charged particles are driven to move to the partition plates 141.
An electrophoretic fluid (not shown), red charged particles 142, green charged particles 143, and blue charged particles 144 are disposed in each sub-pixel 101a, and the electrophoretic fluid, the red charged particles 142, the green charged particles 143, and the blue charged particles 144 are filled in the accommodating cavity. In the present embodiment, each sub-pixel 101a includes the common electrode 123 of the first substrate 12, the color film layer 125, the electrophoretic liquid filled in the accommodating cavity, the red charged particles 142, the green charged particles 143, and the blue charged particles 144, and the thin film transistor switch 138, the pixel electrode 135, and the light reflecting layer 137 on the second substrate 13. It should be mentioned that each sub-pixel 101a contains a plurality of red charged particles 142, a plurality of green charged particles 143, and a plurality of blue charged particles 144.
The electrophoretic fluid in the sub-pixel 101a is gray, external environmental light enters the electrophoretic fluid from the first substrate 12 side, and the brightness of the light gradually decreases from the first substrate 12 toward the second substrate 13. The area in the sub-pixel 101a close to the first substrate 12 is defined as a display area 102, the area close to the second substrate 13 is defined as a dark area 103, the charged particles in the display area 102 are target charged particles, and the charged particles in the dark area 103 are non-target charged particles. In the present embodiment, when external ambient light enters the display area 102 from the first substrate 12 side, the charged particles in the display area 102 can reflect the light out of the first substrate 12, thereby displaying a color image; for example, when the red charged particles 142 reflect light out of the first substrate 12, the display device 10 displays a red screen; when the green charged particles 143 reflect light out of the first substrate 12, the display device 10 displays a green image; when the blue charged particles 144 reflect light out of the first substrate 12, the display device 10 displays a blue image. It is worth mentioning that the closer the charged particles in the display region 102 are to the dark region 103, the lower the gray scale brightness of the reflected light reflected by the charged particles.
The red charged particles 142, the green charged particles 143, and the blue charged particles 144 in the sub-pixel 101a have charges with the same property, i.e., all have negative charges, but not limited thereto, for example, the red charged particles 142, the green charged particles 143, and the blue charged particles 144 all have positive charges. The charge-to-mass ratios of the red charged particles 142, the green charged particles 143, and the blue charged particles 144 are different from each other, wherein the charge-to-mass ratio of the red charged particles 142 is smaller than the charge-to-mass ratio of the green charged particles 143, and the charge-to-mass ratio of the green charged particles 143 is smaller than the charge-to-mass ratio of the blue charged particles 144, so that when a driving electric field is generated between the first substrate 12 and the second substrate 13, the moving speed of the red charged particles 142 is smaller than the moving speed of the green charged particles 143, and the moving speed of the green charged particles 143 is smaller than the moving speed of the blue charged particles 144.
Since the moving speed of each charged particle in the electric field is different, the display device 10 can display a red screen, a green screen, a blue screen, a color screen, and the like by applying a positive voltage and a negative voltage to the common electrode 123 and applying a negative voltage and a positive voltage to the pixel electrode 135; meanwhile, the adsorption electrode 141a in the dark area 103 is controlled to generate an electric field (the adsorption electrode 141a in the display area 102 does not generate an electric field), so that the non-target charged particles in the dark area 103 are adsorbed, and the influence of the non-target charged particles on the picture color is avoided.
Fig. 3 is a schematic structural diagram of a single pixel of a display device according to a second embodiment of the present invention. As shown in fig. 3, the display device 10 ' in the present embodiment has substantially the same structure as the display device 10 in the first embodiment, but is different in the structure of the first substrate 12 ' and the electronic paper 14 '.
Specifically, the first substrate 12' includes a first base plate 122, a common electrode 123, a first insulating layer 124, and a color film layer 125. The first bottom plate 122 is made of a transparent material, such as glass, but not limited thereto. The common electrode 123 is disposed on the first base substrate 122, and the first insulating layer 124 covers the common electrode 123. In the present embodiment, the common electrode 123 is made of ITO material, i.e. the first substrate 12' is light-permeable. The color film layer 125 covers the first insulating layer 124, and the color film layer 125 includes a red light-blocking layer 125a, a green light-blocking layer 125b, and a blue light-blocking layer 125 c.
Two sides of the electronic paper 14 'are respectively located between the first insulating layer 124 of the first substrate 12' and the reflective layer 137 of the second substrate 13. The three sub-pixels 101a of each pixel 101 of the electronic paper 14' are disposed corresponding to the red, green, and blue light-blocking layers 125a, 125b, and 125c, respectively. An electrophoretic fluid (not shown), red charged particles 142, green charged particles 143, blue charged particles 144 and white charged particles 145 are disposed in each sub-pixel 101a, and the electrophoretic fluid, the red charged particles 142, the green charged particles 143, the blue charged particles 144 and the white charged particles 145 are filled in the accommodating cavity. In the present embodiment, each sub-pixel 101a includes the common electrode 123 of the first substrate 12', the color film 125, the electrophoretic liquid filled in the accommodating cavity, the red charged particles 142, the green charged particles 143, the blue charged particles 144, and the white charged particles 145, and the thin film transistor switch 138, the pixel electrode 135, and the light reflecting layer 137 on the second substrate 13. It should be noted that each sub-pixel 101a contains a plurality of red charged particles 142, a plurality of green charged particles 143, a plurality of blue charged particles 144, and a plurality of white charged particles 145, and the charge property of the white charged particles 145 is different from the charge property of the red charged particles 142, the green charged particles 143, and the blue charged particles 144, that is, if the red charged particles 142, the green charged particles 143, and the blue charged particles 144 are all negatively charged, the white charged particles 145 are positively charged, and vice versa.
The display device 10' in this embodiment can perform display of three primary colors of red, green, and blue, and can also perform display of colors such as cyan, magenta, and yellow by the charged particles in cooperation with the color film layer 125. For example, when the display of three primary colors of red, green, and blue is performed, only a negative voltage is applied to the first substrate 12', and the white charged particles 145 move to the display region 102, thereby realizing the display of three primary colors; for example, when cyan, magenta, and yellow displays are performed, mixed color displays can be performed by applying positive and negative voltages to the common electrode 123 and negative and positive voltages to the pixel electrode 135 to move the charged colored particles to the display region 102.
The color display method of the present invention is described below with reference to the display device 10 of the first embodiment using the display devices 10 and 10' described above, and specifically, the color display method includes the steps of:
providing a first substrate 12;
providing a second substrate 13, and enabling the first substrate 12 and the second substrate 13 to be oppositely arranged;
providing an electronic paper 14, disposing the electronic paper 14 between the first substrate 12 and the second substrate 13, wherein the electronic paper 14 includes a plurality of pixels 101, the pixels 101 include a plurality of sub-pixels 101a, the sub-pixels 101a are disposed with an electrophoretic fluid, red charged particles 142, green charged particles 143, and blue charged particles 144, a charge-to-mass ratio of the red charged particles 142 is smaller than a charge-to-mass ratio of the green charged particles 143, and a charge-to-mass ratio of the green charged particles 143 is smaller than a charge-to-mass ratio of the blue charged particles 144, generating an electric field for driving the charged particles to move by using the first substrate 12 and the second substrate 13, driving the target charged particles to move to the first substrate 12, and driving the non-target charged particles to move to the partition 141 by generating an electric field for driving the charged particles to move between the oppositely disposed partitions 141.
Fig. 4a to 4d are schematic diagrams illustrating a process of displaying red color by the color display method of the present invention. As shown in fig. 4a to 4d, the step of displaying red color by the color display method of the present invention includes:
step one, the common electrode 123 is positively charged, the pixel electrode 135 is negatively charged, at this time, the red charged particles 142, the green charged particles 143, and the blue charged particles 144 move to the first substrate 12 under the action of the electric field, and then the stable picture is powered off, as shown in fig. 4a and 4 b;
step two, the common electrode 123 is charged negatively, the pixel electrode 135 is charged positively, at this time, the red charged particles 142, the green charged particles 143, and the blue charged particles 144 are moved toward the direction close to the second substrate 13 by the electric field, because the charge-to-mass ratio of the red charged particles 142 is smaller than the charge-to-mass ratio of the green charged particles 143, the charge-to-mass ratio of the green charged particles 143 is smaller than the charge-to-mass ratio of the blue charged particles 144, the electrophoretic moving speed of the red charged particles 142 in the electrophoretic liquid is smaller than the electrophoretic moving speed of the green charged particles 143, the electrophoretic moving speed of the green charged particles 143 is smaller than the electrophoretic moving speed of the blue charged particles 144, after the blue charged particles 144 and the green charged particles 143 enter the dark area 103, the red charged particles 142 are still in the display area 102, at this time, the ambient light entering the display area 102 is reflected by the red charged particles, as shown in fig. 4 c;
step three, an electric field for driving the charged particles to move is generated by the adsorption electrode 141a, and the green charged particles 143 and the blue charged particles 144 are driven to move to the partition 141, as shown in fig. 4 d.
In the present embodiment, the gray level of the ambient light gradually decreases while the red charged particles 142 move toward the second substrate 13, and therefore, the red level of the red charged particles 142 gradually decreases.
Fig. 5 is a schematic diagram of driving waveforms in the process of displaying red color according to the present invention. Referring to fig. 4a to 5, the common electrode 123 is charged with positive voltage, the pixel electrode 135 is charged with negative voltage, and the previous picture is zeroed within time t 1; the common electrode 123 and the pixel electrode 135 are set to zero voltage, and the picture is kept for t 2; the common electrode 123 is charged negatively, the pixel electrode 135 is charged positively, and the green charged particles 143 and the blue charged particles 144 enter the dark region 103 within the time t 3; the common electrode 123 and the pixel electrode 135 are set to be zero voltage, the red color level of the picture is the highest at this time, the common electrode 123 is continuously charged negatively, the pixel electrode 135 is charged positively, and the red color level of the picture is gradually reduced (from L100 to L0) within the time t 4; the common electrode 123 and the pixel electrode 135 are set to zero voltage, and the picture is held for a time t 5.
Fig. 6a to 6d are schematic diagrams illustrating a process of displaying green color by the color display method of the present invention. As shown in fig. 6a to 6d, the step of displaying green color by the color display method of the present invention includes:
step one, the common electrode 123 is charged negatively, the pixel electrode 135 is charged positively, at this time, the red charged particles 142, the green charged particles 143, and the blue charged particles 144 move to the second substrate 13 under the action of the electric field, and then the image is powered off and stabilized, as shown in fig. 6 a;
step two, the common electrode 123 is positively charged, the pixel electrode 135 is negatively charged, and at this time, the red charged particles 142, the green charged particles 143, and the blue charged particles 144 are moved toward the direction close to the first substrate 12 by the electric field, because the charge-to-mass ratio of the red charged particles 142 is smaller than the charge-to-mass ratio of the green charged particles 143, the charge-to-mass ratio of the green charged particles 143 is smaller than the charge-to-mass ratio of the blue charged particles 144, the electrophoretic moving speed of the red charged particles 142 in the electrophoretic liquid is smaller than the electrophoretic moving speed of the green charged particles 143, the electrophoretic moving speed of the green charged particles 143 is smaller than the electrophoretic moving speed of the blue charged particles 144, after the blue charged particles 144 and the green charged particles 143 enter the display region 102, the red charged particles 142 are still in the dark region 103, and then the stable picture is powered off;
step three, the common electrode 123 is charged negatively, the pixel electrode 135 is charged positively, at this time, the red charged particles 142, the green charged particles 143, and the blue charged particles 144 are moved toward the direction close to the second substrate 13 again by the electric field, the charge-to-mass ratio of the green charged particles 143 is smaller than the charge-to-mass ratio of the blue charged particles 144, the electrophoretic moving speed of the green charged particles 143 in the electrophoretic liquid is smaller than the electrophoretic moving speed of the blue charged particles 144, when the blue charged particles 144 enter the dark area 103, the green charged particles 143 are still in the display area 102, the green charged particles 143 reflect the ambient light entering the display area 102, and the sub-pixel 101a displays green, as shown in fig. 6 c;
step four, an electric field for driving the charged particles to move is generated by the adsorption electrode 141a, and the red charged particles 142 and the blue charged particles 144 are driven to move to the partition 141, as shown in fig. 6 d.
In the present embodiment, the gray level of the ambient light gradually decreases while the green charged particles 143 move toward the second substrate 13, and thus, the green level of the green charged particles 143 gradually decreases.
Fig. 7 is a schematic diagram of driving waveforms in the process of displaying green color according to the present invention. Referring to fig. 6a to 7, the common electrode 123 is charged negatively, the pixel electrode 135 is charged positively, and the previous picture is zeroed within time t 1; the common electrode 123 and the pixel electrode 135 are charged with negative voltage to zero voltage, and the picture is kept for t 2; the common electrode 123 is charged positively, the pixel electrode 135 is charged negatively, and the green charged particles 143 and the blue charged particles 144 enter the display area 102 within time t 3; the common electrode 123 and the pixel electrode 135 are set to zero voltage, and the picture is kept for t 4; causing the common electrode 123 to be negatively charged and the pixel electrode 135 to be positively charged, the blue charged particles 144 enter the dark region 103 during time t 5; the common electrode 123 and the pixel electrode 135 are set to zero voltage, the green gradation of the picture is the highest at this time, the common electrode 123 is continuously negatively charged, the pixel electrode 135 is positively charged, and the green gradation of the picture is gradually decreased (from L100 to L0) within time t 6.
Fig. 8a to 8c are schematic diagrams illustrating a process of displaying red color by the color display method of the present invention. As shown in fig. 8a to 8c, the step of displaying blue color by the color display method of the present invention includes:
step one, the common electrode 123 is charged negatively, the pixel electrode 135 is charged positively, at this time, the red charged particles 142, the green charged particles 143, and the blue charged particles 144 move to the second substrate 13 under the action of the electric field, and then the image is powered off and stabilized, as shown in fig. 8 a;
step two, the common electrode 123 is charged with positive electricity, the pixel electrode 135 is charged with negative electricity, at this time, the red charged particles 142, the green charged particles 143 and the blue charged particles 144 are moved toward the first substrate 12 by the electric field, since the charge-to-mass ratio of the red charged particles 142 is smaller than that of the green charged particles 143, the charge-to-mass ratio of the green charged particles 143 is smaller than that of the blue charged particles 144, the electrophoretic moving velocity of the red charged particles 142 is smaller than that of the green charged particles 143, the electrophoretic moving velocity of the green charged particles 143 is smaller than that of the blue charged particles 144, after the blue charged particles 144 enter the display area 102, the green charged particles 143 and the red charged particles 142 are still in the dark area 103, the blue charged particles 144 reflect the ambient light entering the display area 102, and the sub-pixel 101a displays blue, as shown in fig. 8 b;
step three, an electric field for driving the charged particles to move is generated by the adsorption electrode 141a, and the red charged particles 142 and the green charged particles 143 are driven to move to the partition 141, as shown in fig. 8c
In the present embodiment, the gray scale of the ambient light gradually increases as the blue charged particles 144 move toward the first substrate 12, and thus, the blue level of the blue charged particles 144 gradually increases.
Fig. 9 is a schematic diagram of driving waveforms in the process of displaying blue color according to the present invention. Referring to fig. 8a to 9, the common electrode 123 is charged negatively, the pixel electrode 135 is charged positively, and the previous picture is zeroed within time t 1; the common electrode 123 and the pixel electrode 135 are set to zero voltage, and the picture is kept for t 2; the common electrode 123 is charged positively and the pixel electrode 135 is charged negatively, and the blue charged particles 144 enter the display area 102 during time t 3; setting the common electrode 123 and the pixel electrode 135 to be zero voltage, wherein the blue color level of the picture is the lowest, continuing to charge the common electrode 123 positively, and the pixel electrode 135 is charged negatively, and the blue color level of the picture gradually rises (from L0 to L100) within the time t 4; the common electrode 123 and the pixel electrode 135 are set to zero voltage, and the picture is held for a time t 5.
It should be noted that the steps of the color display method of the present invention for displaying images by using the display device 10 'of the second embodiment are the same as those described above, but the difference is that the method can be used for displaying mixed colors, and when displaying three primary colors of red, green, and blue, only a negative voltage is applied to the first substrate 12', and at this time, the white charged particles 145 move to the display region 102, thereby realizing the three primary colors.
The color display method of the invention can display a primary color display, such as red, green and blue display; color display can also be performed, that is, three sub-pixels 101a of each pixel 101 are controlled to perform mixed display of colors of three primary colors of red, green and blue, and the gray scale of each primary color can be realized by controlling the driving waveform time t. Moreover, the non-target charged particles in the dark region 103 are adsorbed on the partition 141, so that the influence of the non-target charged particles on the display screen is avoided, and the color of the screen is cleaner.
The display device 10, 10 ' of the present invention has the first substrate 12, 12 ' and the second substrate 13 disposed opposite to each other, the electronic paper 14, 14 ' disposed between the first substrate 12, 12 ' and the second substrate 13, the electronic paper 14, 14 ' including a plurality of pixels 101, the pixel 101 including a plurality of sub-pixels 101a, the sub-pixels 101a having spacers 141 disposed around them, the spacers 141 enclosing a region having electrophoretic fluid, red charged particles 142, green charged particles 143, and blue charged particles 144, the red charged particles 142 having a charge-to-mass ratio smaller than that of the green charged particles 143, the green charged particles 143 having a charge-to-mass ratio smaller than that of the blue charged particles 144, an electric field for driving the charged particles to move generated between the first substrate 12, 12 ' and the second substrate 13, a target charged particle to move to the first substrate 12, 12 ', and an electric field for driving the charged particles to move generated between the spacers 141 disposed opposite to each other, the non-target charged particles are driven to move to the partition 141. Therefore, the display devices 10 and 10' of the present invention can utilize the difference in the moving speed of the red charged particles 142, the green charged particles 143, and the blue charged particles 144 to realize color image display by controlling the driving voltage time, and at the same time, the partition 141 generates an electric field for driving the charged particles to move, so as to drive the non-target charged particles to move to the partition 141, thereby avoiding the non-target charged particles from affecting the display image and making the image color more pure.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention. The respective technical features described in the above embodiments can be combined in any suitable manner without contradiction. The invention is not described in detail in order to avoid unnecessary repetition.
Claims (9)
1. A display device is characterized by comprising
A first substrate (12);
a second substrate (13) disposed opposite to the first substrate (12); and
an electronic paper (14) disposed between the first substrate (12) and the second substrate (13), the electronic paper (14) including a plurality of pixels (101), the pixels (101) including a plurality of sub-pixels (101a), a partition (141) disposed around the sub-pixels (101a), a region surrounded by the partition (141) including an electrophoretic fluid, red charged particles (142), green charged particles (143), and blue charged particles (144), a charge-to-mass ratio of the red charged particles (142) being smaller than a charge-to-mass ratio of the green charged particles (143), a charge-to-mass ratio of the green charged particles (143) being smaller than a charge-to-mass ratio of the blue charged particles (144), an electric field for driving the charged particles to move being generated between the first substrate (12) and the second substrate (13), a target charged particle being driven to move to the first substrate (12), and an electric field for driving the charged particles to move being generated between the partition (141) disposed opposite to each other, the non-target charged particles are driven to move to the partition (141), the area of the sub-pixel (101a) close to the first substrate (12) is a display area (102), the area close to the second substrate (13) is a dark area (103), the charged particles in the display area (102) are the target charged particles, the charged particles in the dark area (103) are the non-target charged particles, an adsorption electrode (141a) is arranged on the partition (141), an electric field for driving the charged particles to move can be generated between the adsorption electrodes (141a) which are oppositely arranged, the adsorption electrode (141a) of the dark area (103) generates an electric field for driving the non-target charged particles to move to the partition (141), and the adsorption electrode (141a) of the display area (102) does not generate an electric field.
2. A display device as claimed in claim 1, characterized in that the first substrate (12) comprises a common electrode (123), the second substrate (13) comprises a pixel electrode (135), and an electric field for driving the charged particles is generated between the common electrode (123) and the pixel electrode (135); the second substrate (13) further comprises a plurality of scanning lines (131) and a plurality of data lines (132), and the sub-pixels (101a) of the pixels (101) are defined by the plurality of scanning lines (131) and the plurality of data lines (132) intersecting with each other.
3. The display device according to claim 2, wherein the second substrate (13) further comprises a second substrate (133), and a gate electrode, a gate insulating layer, a semiconductor layer, a source electrode, a drain electrode, a second insulating layer (134) and a third insulating layer (136) sequentially disposed on the second substrate (133), the pixel electrode (135) is disposed between the second insulating layer (134) and the third insulating layer (136), the second insulating layer (134) is disposed with a via hole for leaking the drain electrode, the pixel electrode (135) passes through the via hole to be electrically connected to the drain electrode, the gate electrode is electrically connected to the scan line (131), and the source electrode is electrically connected to the data line (132).
4. A display device as claimed in claim 3, characterized in that the second substrate (13) further comprises a light-reflecting layer (137), the light-reflecting layer (137) being provided on the third insulating layer (136).
5. The display device according to claim 1, wherein a color film layer (125) is disposed on the first substrate (12), the color film layer (125) includes a red photoresist layer (125a), a green photoresist layer (125b) and a blue photoresist layer (125c), the red photoresist layer (125a), the green photoresist layer (125b) and the blue photoresist layer (125c) are disposed corresponding to each of the sub-pixels (101a), and white charged particles (145) are disposed in an area surrounded by the partition plates (141), and a charge property of the white charged particles (145) is different from a charge property of the red charged particles (142), the green charged particles (143) and the blue charged particles (144).
6. A color display method, comprising the steps of:
providing a first substrate (12);
providing a second substrate (13), and enabling the first substrate (12) and the second substrate (13) to be oppositely arranged;
providing an electronic paper (14), and arranging the electronic paper (14) between the first substrate (12) and the second substrate (13), wherein the electronic paper (14) comprises a plurality of pixels (101), the pixels (101) comprise a plurality of sub-pixels (101a), partition boards (141) are arranged around the sub-pixels (101a), an electrophoretic fluid, red charged particles (142), green charged particles (143) and blue charged particles (144) are arranged in a region surrounded by the partition boards (141), the charge-to-mass ratio of the red charged particles (142) is smaller than that of the green charged particles (143), and the charge-to-mass ratio of the green charged particles (143) is smaller than that of the blue charged particles (144); an electric field for driving charged particles to move is generated between the first substrate (12) and the second substrate (13), target charged particles are driven to move to the first substrate (12), an electric field for driving charged particles to move is generated between the oppositely arranged partition boards (141), non-target charged particles are driven to move to the partition boards (141), an area in the sub-pixel (101a) close to the first substrate (12) is a display area (102), an area close to the second substrate (13) is a dark area (103), charged particles in the display area (102) are the target charged particles, charged particles in the dark area (103) are the non-target charged particles, adsorption electrodes (141a) are arranged on the partition boards (141), an electric field for driving charged particles to move can be generated between the oppositely arranged adsorption electrodes (141a), and the adsorption electrodes (141a) of the dark area (103) generate electric fields for driving non-target charged particles to move to the partition boards (141) An electric field is not generated by the adsorption electrode (141a) of the display region (102).
7. The color display method according to claim 6, wherein the step of displaying red color comprises:
driving the red charged particles (142), the green charged particles (143) and the blue charged particles (144) to move to the first substrate (12);
driving the red charged particles (142), the green charged particles (143) and the blue charged particles (144) to move towards a direction close to the second substrate (13), when the green charged particles (143) and the blue charged particles (144) move to the dark region (103), the red charged particles (142) are in the display region (102) and display red;
an electric field for driving the charged particles to move is generated by the adsorption electrode (141a), and the green charged particles (143) and the blue charged particles (144) are driven to move to the partition (141).
8. The color display method according to claim 7, wherein the step of displaying green color comprises:
driving the red charged particles (142), the green charged particles (143) and the blue charged particles (144) to move to the second substrate (13);
driving the red charged particles (142), the green charged particles (143) and the blue charged particles (144) to move towards a direction close to the first substrate (12), wherein when the green charged particles (143) and the blue charged particles (144) move to the display region (102), the red charged particles (142) are in the dark region (103);
driving the green charged particles (143) and the blue charged particles (144) to move towards a direction close to the second substrate (13), when the blue charged particles (144) move to the dark region (103), the green charged particles (143) are in the display region (102) and display green;
the adsorption electrode (141a) generates an electric field for driving the charged particles to move, and the red charged particles (142) and the blue charged particles (144) are driven to move to the partition (141).
9. The color display method according to claim 7, wherein the step of displaying blue color comprises:
driving the red charged particles (142), the green charged particles (143) and the blue charged particles (144) to move to the second substrate (13);
driving the red charged particles (142), the green charged particles (143) and the blue charged particles (144) to move towards a direction close to the first substrate (12), when the green charged particles (143) and the red charged particles (142) are in the dark region (103), the blue charged particles (144) move to the display region (102) and display blue;
the adsorption electrode (141a) is used to generate an electric field for driving the charged particles to move, and the red charged particles (142) and the green charged particles (143) are driven to move to the partition (141).
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| CN108831319B (en) * | 2018-07-03 | 2021-01-26 | 京东方科技集团股份有限公司 | Micro LED display device |
| CN108681180B (en) * | 2018-07-26 | 2023-11-24 | 华南师范大学 | Color photoelectric display device |
| CN113767329B (en) * | 2019-05-03 | 2024-07-02 | 伊英克公司 | Layered structure with high dielectric constant for active matrix backplanes |
| CN110596985A (en) * | 2019-08-09 | 2019-12-20 | 信利半导体有限公司 | Electrophoresis display device |
| EP4162482A4 (en) * | 2020-06-05 | 2024-07-03 | E Ink Corp | Methods for achieving color states of lesser-charged particles in electrophoretic medium including at least four types of particles |
| CN113934068B (en) * | 2021-10-26 | 2024-05-31 | 福州京东方光电科技有限公司 | Electronic paper display device and control method and device thereof |
| CN118011702B (en) * | 2024-04-09 | 2024-07-09 | 惠科股份有限公司 | Display panel and display device |
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