CN102708807A - Electronic paper capable of switching active light emitting and passive light emitting - Google Patents
Electronic paper capable of switching active light emitting and passive light emitting Download PDFInfo
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- CN102708807A CN102708807A CN2012101885465A CN201210188546A CN102708807A CN 102708807 A CN102708807 A CN 102708807A CN 2012101885465 A CN2012101885465 A CN 2012101885465A CN 201210188546 A CN201210188546 A CN 201210188546A CN 102708807 A CN102708807 A CN 102708807A
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Abstract
The invention provides electronic paper capable of switching active light emitting and passive light emitting. The electronic paper comprises an electronic paper display (EPD) substrate, a thin film transistor (TFT) substrate, a display module and a selector switch, wherein the TFT substrate is opposite to the EPD substrate; the display module is arranged between the EPD substrate and the TFT substrate; the selector switch is used for switching the electronic paper into an active light emitting mode or a passive light emitting mode; and when the electronic paper is in the active light emitting mode, a reflection unit reflects backlight emitted by a backlight source to a plurality of display units, so that the display units display images. According to the electronic paper, if external ambient light is not detected, the electronic paper is switched into the active light emitting mode by the selector switch, and in the active light emitting mode, the reflection unit reflects the backlight emitted by the backlight source to the display units, and the images are further displayed. In addition, when the external ambient light is detected, the electronic paper is switched from the active light emitting mode into the passive light emitting mode by the selector switch, and the backlight source is closed, so that energy sources are saved.
Description
Technical field
The present invention relates to a kind of Electronic Paper, relate in particular to a kind of Electronic Paper that realizes active illuminating and passive luminous mutual switching.
Background technology
Along with the continuous progress of development of science and technology and semiconductor technology, display device of electronic paper receives technician and consumer's favor gradually with its high-contrast, low-power consumption, advantage such as frivolous.In brief, and the Electronic Paper demonstration (Electronic Paper Display, EPD) device is the display device of a new generation, its contrast high (the demonstration contrast than plain paper is taller) can not damaged in light weight and thin thickness yet under solar radiation.Because the only just electricity consumption when clear screen of EPD device, and when outage, still keep showing, thereby power attenuation is also lower.
In general, the display unit in the Electronic Paper mainly is divided into two kinds of white particle and black particles, reflects outside surround lighting through white particle, through black particle or dark solution also absorbing light, thereby reaches the effect of white and black displays.Yet, in a kind of design proposal of conditional electronic paper, often must come display image (this display mode is called passive display mode) by external ambient light, if do not having under the situation of exterior light, Electronic Paper just can't show.In addition,, show through this backlight irradiation display unit though another design proposal can be provided with an external backlight, the very difficult control of the homogeneity of backlight emergent ray, and to pack up often that this is external backlight, operate comparatively loaded down with trivial details.
In view of this, how to design a kind of Electronic Paper of novelty, it can freely be switched between luminous in active illuminating and passive, guaranteeing under the normal situation that shows, but energy savings also is a problem needing to be resolved hurrily of person skilled in the industry.
Summary of the invention
To the existing above-mentioned defective of Electronic Paper of the prior art, the invention provides a kind of Electronic Paper that realizes active illuminating and passive luminous mutual switching.
According to an embodiment of the present invention, a kind of Electronic Paper that realizes active illuminating and passive luminous mutual switching is provided, Electronic Paper comprises:
One EPD (Electronic Paper Display, Electronic Paper shows) substrate;
One TFT (Thin Film Transistor, thin film transistor (TFT)) substrate is oppositely arranged with said EPD substrate;
One display module is arranged between said EPD substrate and the said TFT substrate, and said display module comprises a plurality of display units, comes display image by said display unit; And
One switches switch, is used for said Electronic Paper is switched to active illuminating pattern or passive light-emitting mode;
Wherein, when said Electronic Paper has the initiative light-emitting mode, the backlight of backlight outgoing reflexed to said a plurality of display unit, thereby make said display unit display image by a reflector element.
In one embodiment, this Electronic Paper also comprises an optical sensor, is used to detect the surround lighting from the outside, if do not detect surround lighting, then by said change-over switch said Electronic Paper is switched to said active illuminating pattern.
In one embodiment, when said Electronic Paper was in passive light-emitting mode, said backlight was closed; When said Electronic Paper had the initiative light-emitting mode, said backlight was opened.
In one embodiment, reflector element is arranged between a hyaline layer and the flatness layer, and said hyaline layer is arranged at TFT substrate top, and said flatness layer is arranged at the below of a black matrix layer.Further, this reflector element is arranged at the centre position of per three display units.In addition,, can be set to pyramidal structure by reflector element, and the drift angle of this pyramidal structure is 145 degree for the light that guarantees the reflector element reflection can shine distance display unit far away.
In one embodiment, with one first electrode and one second electrode that the control electrode of TFT substrate one side is arranged to be interspersed, the width of said first electrode is different from the width of said second electrode.Further, first electrode and second electrode are controlled by thin film transistors with different.
In one embodiment, this backlight is an Organic Light Emitting Diode (OLED, Organic Light Emitting Diode).
Adopt the Electronic Paper that realizes active illuminating and passive luminous mutual switching of the present invention; If do not detect outside surround lighting; This Electronic Paper switches to the active illuminating pattern by change-over switch with it; And under this pattern, the backlight of backlight outgoing reflexed to a plurality of display units, and then display image through reflector element.In addition, when detecting outside surround lighting, this Electronic Paper is passive light-emitting mode with it from the active illuminating mode switch by change-over switch, and backlight is closed, thus energy savings.
Description of drawings
The reader with reference to advantages after the embodiment of the present invention, will become apparent various aspects of the present invention.Wherein,
Fig. 1 illustrates according to an embodiment of the present invention, can realize the surface structure synoptic diagram of the Electronic Paper of active illuminating and passive luminous mutual switching;
Fig. 2 A illustrates the Electronic Paper of Fig. 1 and in passive light-emitting mode, carries out the principle schematic that image shows;
Fig. 2 B illustrates the Electronic Paper of Fig. 1 and in the active illuminating pattern, carries out the principle schematic that image shows;
Fig. 3 (a) illustrates the Electronic Paper of Fig. 2 A when show white, the polarity distribution schematic diagram of control electrode;
Fig. 3 (b) illustrates the Electronic Paper of Fig. 2 A when showing black, the polarity distribution schematic diagram of control electrode;
Fig. 4 illustrates the Electronic Paper of Fig. 2 B and under the active illuminating pattern, carries out first embodiment that image shows;
Fig. 5 illustrates the Electronic Paper of Fig. 2 B and under the active illuminating pattern, carries out second embodiment that image shows; And
Fig. 6 illustrates in the Electronic Paper of Fig. 1, the circuit diagram that first electrode on the TFT substrate and second electrode are controlled.
Embodiment
For technology contents that the application is disclosed is more detailed and complete, can be with reference to accompanying drawing and following various specific embodiments of the present invention, identical mark is represented same or analogous assembly in the accompanying drawing.Yet the embodiment that those of ordinary skill in the art should be appreciated that hereinafter to be provided is used for limiting the scope that the present invention is contained.In addition, accompanying drawing only is used for schematically explaining, does not draw according to its life size.
With reference to the accompanying drawings, the embodiment of various aspects of the present invention is done further to describe in detail.
Fig. 1 illustrates according to an embodiment of the present invention, can realize the surface structure synoptic diagram of the Electronic Paper of active illuminating and passive luminous mutual switching.Fig. 2 A illustrates the Electronic Paper of Fig. 1 and in passive light-emitting mode, carries out the principle schematic that image shows.Fig. 2 B illustrates the Electronic Paper of Fig. 1 and in the active illuminating pattern, carries out the principle schematic that image shows.
With reference to Fig. 1, Fig. 2 A and Fig. 2 B, Electronic Paper of the present invention comprises that an EPD substrate 201, a backlight 200, a TFT substrate 202, a display module and switch switch 104.Wherein, TFT substrate 202 is oppositely arranged with EPD substrate 201, and display module is between EPD substrate 201 and TFT substrate 202.
This display module comprises a plurality of display units, carries out image by these display units and shows.For example, display unit comprises globular particle of a plurality of whites and the globular particle of a plurality of black, utilizes white particle to come reflection ray and utilizes black particle to absorb light, thereby realize the white and black displays of image.
This change-over switch 104 is used for Electronic Paper is switched to active illuminating pattern or passive light-emitting mode.At this, the active illuminating pattern is meant that Electronic Paper need not the surround lighting by means of the outside, and adopts the backlight of set inside to provide the light that is incident upon display unit; Passive light-emitting mode is meant that Electronic Paper need not to open backlight, and only need utilize outside surround lighting to offer the state of display unit.
What need particularly point out is that Electronic Paper of the present invention also comprises a reflector element 208, is used to reflect the light from backlight 200 outgoing.More specifically, when Electronic Paper has the initiative light-emitting mode, this reflector element 208 of the arrival backlight of backlight 200 outgoing, the white particle of reflection ray outgoing to the display unit that it is corresponding, and then show white image.If the black particle of corresponding reflection ray outgoing to display unit is then because the absorption effects of black particle, at corresponding position display black image.
In one embodiment, this Electronic Paper also comprises an optical sensor 102.Whether the surround lighting that this optical sensor 102 is used for detecting from the outside exists.When optical sensor 102 does not detect surround lighting, can send an indicator signal (like light signal or voice signal), the user only need operate change-over switch (such as pushing switching push button) then, just can Electronic Paper be transformed into the active illuminating pattern and carry out the image demonstration.In addition, for energy savings, when Electronic Paper is in passive light-emitting mode, close backlight 200.
Shown in Fig. 2 A, when the surround lighting of outside existed, surround lighting was incident to the black particle surface and the white particle surface of display unit.Shown in preceding, the light that incides the black particle surface is absorbed, and is reflected and incide the surperficial light of white particle.Under this situation, the backlight 200 that is positioned at TFT substrate 202 belows need not to open, and the reflector element 208 that is positioned at black-matrix layer 206 belows does not have any light and reflects.
Shown in Fig. 2 B, when the surround lighting of outside does not exist, Electronic Paper is switched to the active illuminating pattern through change-over switch 104, at this moment, the backlight 200 that is positioned at TFT substrate 202 belows is opened.Reflect via reflector element 208 from the light of backlight 200 outgoing.A part of light after the reflection arrives black particle, thereby is absorbed by black particle, and another part light after the reflection arrives white particle, and on the surface of white particle secondary reflection takes place, thus in the relevant position show white.Should be appreciated that also need cooperate with the polarity of electrode of the electrode 204 of TFT substrate 202 1 sides by means of the polarity of electrode of the electrode 203 of EPD substrate 201 1 sides when the position of adjustment white particle and black particle.
Fig. 3 (a) illustrates the Electronic Paper of Fig. 2 A when show white, and the polarity distribution schematic diagram of control electrode, Fig. 3 (b) illustrate the Electronic Paper of Fig. 2 A when showing black, the polarity distribution schematic diagram of control electrode.At this, might as well be electronegative with white particle positively charged and black particle be that example describes.
With reference to Fig. 3 (a), when Electronic Paper is in passive light-emitting mode, the electrode 203 of EPD substrate 201 1 sides is set to negative polarity, the electrode 204 of TFT substrate 202 1 sides is set to positive polarity.Know easily, the white particle of positively charged is attracted to EPD substrate 201 1 sides, and electronegative black particle is absorbed into TFT substrate 202 1 sides.Thereby,, the surround lighting of outside reflects when being incident to Electronic Paper, thus show white.
With reference to Fig. 3 (b), when Electronic Paper is in passive light-emitting mode, the electrode 203 of EPD substrate 201 1 sides is set to positive polarity, the electrode 204 of TFT substrate 202 1 sides is set to negative polarity.Know easily, the white particle of positively charged is attracted to TFT substrate 202 1 sides, and electronegative black particle is attracted to EPD substrate 201 1 sides.Thereby, when the surround lighting of outside is incident to Electronic Paper, absorbed, thereby show black by black particle.
Fig. 4 illustrates the Electronic Paper of Fig. 2 B and under the active illuminating pattern, carries out first embodiment that image shows.
With reference to Fig. 4, this reflector element is between two adjacent display units.See that from vertical direction this reflector element is arranged between a hyaline layer and the flatness layer, this hyaline layer is arranged at the top of TFT substrate 202, and this flatness layer is arranged at the below of black matrix layer 206.In one embodiment, this reflector element is arranged at the centre position of per three display units.In addition, for the reflection ray that guarantees the reflector element outgoing can expose to distance white particle far away, reflector element is set to a pyramidal structure.Better, the drift angle of this pyramidal structure remains on more than or equal to 145 degree, certainly, also can adjust these drift angle number of degrees according to actual needs.
In the embodiment shown in fig. 4, one first electrode and one second electrode that can the control electrode of TFT substrate 202 1 sides is arranged to be interspersed, and the width of first electrode is different from the width of second electrode.
When Electronic Paper works in the active illuminating pattern and need to show black, first electrode and second electrode of TFT substrate 202 1 sides all is set to negative polarity, the electrode of EPD substrate one side is set to positive polarity.Therefore, electronegative black particle is attracted to EPD substrate one side, and the white particle of positively charged is attracted to TFT substrate 202 1 sides, to show black, shown in Fig. 4 left side.
When Electronic Paper worked in the active illuminating pattern and needs show white, at first, first electrode and second electrode that the TFT substrate is set were positive polarity, make white particle reach EPD substrate one side through electric field action, and black particle reaches TFT substrate one side; Then, second electrode of adjustment TFT substrate one side is a negative polarity, makes the black particle that is positioned at originally on first electrode and second electrode only accumulate in first electrode that is positive polarity; At last, the electrode of adjustment EPD one side is a positive polarity, makes white particle move and be fixed in the above towards second electrode of band negative polarity.When the light of backlight outgoing reaches reflector element, reach the white particle surface via the light of reflector element outgoing, produce secondary reflection after, human eye is seen is white image, shown in Fig. 4 right side.
Fig. 5 illustrates the Electronic Paper of Fig. 2 B and under the active illuminating pattern, carries out second embodiment that image shows.
With reference to Fig. 5, when Electronic Paper works in the active illuminating pattern and need to show black, first electrode and second electrode of TFT substrate 202 1 sides all is set to negative polarity, the electrode of EPD substrate one side is set to positive polarity.Therefore, electronegative black particle is attracted to EPD substrate one side, and the white particle of positively charged is attracted to TFT substrate 202 1 sides, to show black, shown in Fig. 5 left side.
When Electronic Paper works in the active illuminating pattern and needs show white; At first, the electrode that TFT substrate one side is set is a positive polarity, and the electrode of EPD substrate one side is a negative polarity; Make white particle reach EPD substrate one side through electric field action, black particle reaches TFT substrate one side; Then, the electrode of adjustment TFT substrate one side is that the electrode of negative polarity and EPD substrate one side is a positive polarity, and the white particle of the top is moved downward, and the black particle of below moves upward; At last, through the control of voltage and time, with white particle last and black particle under state be suspended in the centre.When the light of backlight outgoing reaches reflector element, reach the white particle surface via the light of reflector element outgoing, produce secondary reflection after, human eye is seen is white image, shown in Fig. 5 right side.
In other embodiment; Also can combine OLED (Organic Light Emitting Diode, Organic Light Emitting Diode) technology, backlight is set to colored OLED; Make Electronic Paper under the active illuminating pattern, show multiple color, and be not confined to black and white.
Fig. 6 illustrates in the Electronic Paper of Fig. 1, the circuit diagram that first electrode on the TFT substrate and second electrode are controlled.
With reference to Fig. 6, first electrode that the control electrode of TFT substrate one side is set to be interspersed and second electrode, that is, and first electrode 601,603 and 605, the second electrodes 602 and 604.The width of first electrode is different from the width of second electrode, and for example, the width ratio of first electrode and second electrode is 3: 1.
Wherein, the source electrode of thin film transistor (TFT) T1 is electrically connected to second electrode 602 and 604, and these second electrodes are controlled.The source electrode of thin film transistor (TFT) T2 is electrically connected to first electrode 601,603 and 605, and these first electrodes are controlled.In addition, the grid of thin film transistor (TFT) T1 is connected to one scan line (representing with alphabetical N), and its drain electrode is connected to a data line (representing with Vdata M).The grid of thin film transistor (TFT) T2 is connected to next sweep trace (representing with alphabetical N+1); Its drain electrode is connected to next data line (with Vdata M ' expression), thereby can discharge and recharge first electrode and second electrode respectively through data line Vdata M and Vdata M '.In Fig. 6, Vdata M-1 ' is parallel and adjacent to the data line of Vdata M, and Vdata M+1 is parallel and adjacent to the data line of Vdata M '.
Adopt the Electronic Paper that realizes active illuminating and passive luminous mutual switching of the present invention; If do not detect outside surround lighting; This Electronic Paper switches to the active illuminating pattern by change-over switch with it; And under this pattern, the backlight of backlight outgoing reflexed to a plurality of display units, and then display image through reflector element.In addition, when detecting outside surround lighting, this Electronic Paper is passive light-emitting mode with it from the active illuminating mode switch by change-over switch, and backlight is closed, thus energy savings.
In the preceding text, illustrate and describe embodiment of the present invention.But those skilled in the art can understand, and under situation without departing from the spirit and scope of the present invention, can also specific embodiments of the invention do various changes and replacement.These changes and replacement all drop in claims of the present invention institute restricted portion.
Claims (9)
1. the Electronic Paper that can realize active illuminating and passive luminous mutual switching is characterized in that, said Electronic Paper comprises:
One EPD (Electronic Paper Display, Electronic Paper shows) substrate;
One TFT (Thin Film Transistor, thin film transistor (TFT)) substrate is oppositely arranged with said EPD substrate;
One display module is arranged between said EPD substrate and the said TFT substrate, and said display module comprises a plurality of display units, comes display image by said display unit; And
One switches switch, is used for said Electronic Paper is switched to active illuminating pattern or passive light-emitting mode;
Wherein, when said Electronic Paper has the initiative light-emitting mode, the backlight of backlight outgoing reflexed to said a plurality of display unit, thereby make said display unit display image by a reflector element.
2. Electronic Paper according to claim 1 is characterized in that, also comprises an optical sensor, is used to detect the surround lighting from the outside, if do not detect surround lighting, then by said change-over switch said Electronic Paper is switched to said active illuminating pattern.
3. Electronic Paper according to claim 1 is characterized in that, when said Electronic Paper was in passive light-emitting mode, said backlight was closed; When said Electronic Paper had the initiative light-emitting mode, said backlight was opened.
4. Electronic Paper according to claim 1 is characterized in that, said reflector element is arranged between a hyaline layer and the flatness layer, and said hyaline layer is arranged at TFT substrate top, and said flatness layer is arranged at the below of a black matrix layer.
5. Electronic Paper according to claim 4 is characterized in that said reflector element is arranged at the centre position of per three display units.
6. Electronic Paper according to claim 4 is characterized in that, the tapered structure of said reflector element, and the drift angle of said pyramidal structure is 145 degree.
7. Electronic Paper according to claim 1 is characterized in that, with one first electrode and one second electrode that the control electrode of said TFT substrate one side is arranged to be interspersed, the width of said first electrode is different from the width of said second electrode.
8. Electronic Paper according to claim 7 is characterized in that, said first electrode and said second electrode are controlled by thin film transistors with different.
9. Electronic Paper according to claim 1 is characterized in that, said backlight is an Organic Light Emitting Diode (OLED, Organic Light Emitting Diode).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101885465A CN102708807A (en) | 2012-06-06 | 2012-06-06 | Electronic paper capable of switching active light emitting and passive light emitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101885465A CN102708807A (en) | 2012-06-06 | 2012-06-06 | Electronic paper capable of switching active light emitting and passive light emitting |
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| Publication Number | Publication Date |
|---|---|
| CN102708807A true CN102708807A (en) | 2012-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012101885465A Pending CN102708807A (en) | 2012-06-06 | 2012-06-06 | Electronic paper capable of switching active light emitting and passive light emitting |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015018153A1 (en) * | 2013-08-09 | 2015-02-12 | 京东方科技集团股份有限公司 | Display panel and drive method therefor, and display device |
| CN106601188A (en) * | 2017-01-04 | 2017-04-26 | 奇酷互联网络科技（深圳）有限公司 | Display screen, mobile terminal and control method thereof |
-
2012
- 2012-06-06 CN CN2012101885465A patent/CN102708807A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015018153A1 (en) * | 2013-08-09 | 2015-02-12 | 京东方科技集团股份有限公司 | Display panel and drive method therefor, and display device |
| US9368062B2 (en) | 2013-08-09 | 2016-06-14 | Boe Technology Group Co., Ltd. | Display panel display device including the display panel and method for driving the display panel |
| CN106601188A (en) * | 2017-01-04 | 2017-04-26 | 奇酷互联网络科技（深圳）有限公司 | Display screen, mobile terminal and control method thereof |
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Application publication date: 20121003 |