CN102023450B - Electronic ink display device integrated with touch screen - Google Patents
Electronic ink display device integrated with touch screen Download PDFInfo
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- CN102023450B CN102023450B CN 200910195873 CN200910195873A CN102023450B CN 102023450 B CN102023450 B CN 102023450B CN 200910195873 CN200910195873 CN 200910195873 CN 200910195873 A CN200910195873 A CN 200910195873A CN 102023450 B CN102023450 B CN 102023450B
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Abstract
The invention relates to an electronic ink display device integrated with a touch screen. The electronic ink display device of the integrated touch screen comprises a first substrate, a second substrate, a touch detection device and a shielding layer, wherein the second substrate is arranged opposite to the first substrate, the shielding layer is arranged on one side, close to the second substrate, of the first substrate, and is used for providing a driving signal to the shielding layer. The electronic ink display device integrated with the touch screen is small in thickness and low in cost.
Description
Technical field
The present invention relates to a kind of electronic ink display device of integrated touch screen.
Background technology
Electronic ink display device is because having good resolution, wide viewing angle and high contrast property, and do not need extra voltage keeping the phase in daytime, and becomes the display technique of a new generation.See also Fig. 1, Fig. 1 is a kind of structural representation of electronic ink display device of transverse electric field (In-Plane Switching, IPS) display type of prior art.This electronic ink display device 10 comprises first substrate 11, and the second substrate 12, the backlight 13 that are oppositely arranged parallel with this first substrate 11 and is arranged at light shielding block 14, tft layer 16, public electrode 162, pixel electrode 163, chromatic filter layer 17, microcapsules 18 between this first, second substrate 11,12.This backlight 13 is used for providing backlight to this electronic ink display device 10.This tft layer 16 comprises thin film transistor (TFT) 161.
This light shielding block 14 is arranged at a side of these first substrate 11 contiguous second substrates 12.This tft layer 16 is arranged at a side of these second substrate 12 contiguous these first substrates 11.This public electrode 163 and this pixel electrode 162 are arranged between this chromatic filter layer 17 and this tft layer 16.This chromatic filter layer 17 comprises red (Red), green (Green) that alternately arranges, blue (Blue) three color look filter units.These microcapsules 18 are arranged between this chromatic filter layer 17 and this light shielding block 14.These microcapsules 18 comprise electrolytic solution and the charged particle 181 that is suspended in this electrolytic solution, and this charged particle 181 is with positive and negative charge.This charged particle 181 is light tight.
See also Fig. 1, Fig. 2, wherein, Fig. 2 is the structural representation of tft layer 16, public electrode 162 and the pixel electrode 163 of electronic ink display device 10 shown in Figure 1.This tft layer 16 also comprises many gate lines that are parallel to each other 164, many data lines that are parallel to each other 165 and public electrode wire 168.Every gate line 164 and every data line 165 intersections form a pixel cell.In each pixel cell, the grid of this thin film transistor (TFT) 161 connects this gate line 164, and source electrode connects this data line 165, and drain electrode connects this pixel electrode 163.This public electrode wire 168 be arranged in parallel with this gate line 164, and this public electrode wire 168 is electrically connected with this public electrode 162.This pixel electrode 163 and this public electrode 162 are pectination, and alternately arrange each other.The position of this light shielding block 14 is relative with the position of this thin film transistor (TFT) 161, is used for blocking the reflected light of this thin film transistor (TFT) 161.
Apply conducting and the cut-off that control signal is controlled this thin film transistor (TFT) 161 at this gate line 164, and then whether the voltage of controlling on this data line 165 is applied to this pixel electrode 163.When pixel voltage is applied to this pixel electrode 163 by this data line 165, when common electric voltage is applied to this public electrode 162 by this public electrode wire 168, form horizontal component of electric field between this pixel electrode 163 and this public electrode 162, charged particle 181 in these microcapsules 18 is moved under the effect of this electric field and assembles, because the barrier effect of 181 pairs of light of this charged particle, in the place that this charged particle 181 is assembled, the light that this backlight 13 sends can not pass through these microcapsules 18, and the gap location between this charged particle 181, the light that this backlight 13 sends sees through these microcapsules 18.Therefore, by controlling added voltage between this pixel electrode 163 and this public electrode 162, control the transverse electric field that forms between this pixel electrode 163 and this public electrode 162, and then control arrange density and the position of these microcapsules 18 interior charged particles 181, thereby control this backlight 13 by the throughput of the light of these microcapsules 18, to reach the purpose that shows image.
Touch-screen is as a kind of interface of user interactive and be widely used, in order to make this electronic ink display device 10 have the touching function, common way is to attach one deck touch-screen on the surface of a side relative with this light shielding block 14 of this first substrate 11.Although this way can make this electronic ink display device 10 have the touching function, electronic ink display device 10 thickness of this integrated touch screen are large.
Summary of the invention
The object of the present invention is to provide the electronic ink display device of the little integrated touch screen of a kind of thickness.
A kind of electronic ink display device of integrated touch screen, the second substrate that comprises first substrate, is oppositely arranged with this first substrate, the barrier bed that the electronic ink display device of this integrated touch screen also comprises touch detection device and is arranged at this second substrate one side of vicinity of this first substrate, provide and drive signal in this barrier bed, when touching during this electronic ink display device, this touch detection device is by the flow through touched position of this electronic ink display device of current detecting of this barrier bed of detection.
The preferred a kind of scheme of the present invention, the response speed of this electronic ink display device is lower than the driving frequency of the driving signal of this barrier bed.The electric field summation of the driving signal of this barrier bed is zero.The driving signal of this barrier bed is sine wave signal or pulse square wave signal.The response speed of this electronic ink display device is 100-150ms, and the driving frequency of the driving signal of this barrier bed is 100KHz.
The preferred a kind of scheme of the present invention, this touch detection device is by the flow through touched position of this electronic ink display device of current detecting at four angles of this barrier bed of detection.
The preferred a kind of scheme of the present invention, this barrier bed comprise that a plurality of pieces, first that block block bar and second and block bar, and these are a plurality of to block piece and block bar by this first, second and mutually be electrically connected.
The preferred a kind of scheme of the present invention, this material that blocks piece is chromium or chromium oxide, this light shield layer 24 is the plane of homogeneous conductive performance.This first, second block bar material be chromium or chromium oxide, this first, second block bar and this and block in the same operation of piece and form.
The preferred a kind of scheme of the present invention, the electronic ink display device of this integrated touch screen is the electronic ink display device of transverse electric field display type.
The preferred a kind of scheme of the present invention, the electronic ink display device of this integrated touch screen also comprises tft layer, pixel electrode, public electrode and the chromatic filter layer that is arranged between this first, second substrate, this tft layer is arranged at a side of contiguous this first substrate of this second substrate, this pixel electrode, public electrode are arranged between this tft layer and this chromatic filter layer, this pixel electrode and this public electrode are pectination, and alternately arrange each other.
The preferred a kind of scheme of the present invention, this tft layer comprises thin film transistor (TFT), and this blocks piece and this thin film transistor (TFT) is oppositely arranged, and this first blocks that the position of bar is relative with the position of this gate line, second to block the position of the position of bar and this data line relative.
The preferred a kind of scheme of the present invention, the electronic ink display device of this integrated touch screen also comprises a plurality of microcapsules that are arranged between this chromatic filter layer and this barrier bed, comprises a plurality of charged particles in each microcapsules.
Compared with prior art, the electronic ink display device of integrated touch screen of the present invention blocks piece with this and mutually is electrically connected the formation barrier bed, provide the driving signal to this barrier bed, when touching during this electronic ink display device, this touch detection device is by the flow through touched position of this electronic ink display device of current detecting of this barrier bed of detection.Because utilize this barrier bed to realize the function of touch-screen, therefore, the electronic ink display device of integrated touch screen of the present invention does not need additionally to increase touch-screen, thereby has reduced thickness, has saved cost.
Description of drawings
Fig. 1 is a kind of structural representation of electronic ink display device of transverse electric field display type of prior art.
Fig. 2 is the structural representation of tft layer, public electrode and the pixel electrode of electronic ink display device shown in Figure 1.
Fig. 3 is the structural representation of the electronic ink display device of integrated touch screen of the present invention.
Fig. 4 is the structural representation of barrier bed of the electronic ink display device of integrated touch screen of the present invention.
Fig. 5 is the equivalent schematic of touching circuit of the electronic ink display device of integrated touch screen of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
The invention provides a kind of electronic ink display device of integrated touch screen, barrier bed and the touch detection device of the second substrate that the electronic ink display device of this integrated touch screen mainly comprises first substrate, be oppositely arranged with this first substrate, this second substrate one side of vicinity that is arranged at this first substrate, provide and drive signal in this barrier bed, when touching during this electronic ink display device, this touch detection device is by the flow through touched position of this electronic ink display device of current detecting of this barrier bed of detection.
See also Fig. 3, Fig. 3 is the structural representation of the electronic ink display device of integrated touch screen of the present invention.This electronic ink display device 20 comprises first substrate 21, and the second substrate 22, backlight 23, the touch detection device that are oppositely arranged parallel with this first substrate 21 and is arranged at light shield layer 24, tft layer 26, public electrode 262, pixel electrode 263, chromatic filter layer 27, microcapsules 28 between this first, second substrate 21,22.This backlight 23 is used for providing backlight to this electronic ink display device 20.This touch detection device is by the flow through touched position of this electronic ink display device of current detecting 20 of this barrier bed 24 of detection.
This light shield layer 24 is arranged at a side of these first substrate 21 contiguous second substrates 22, and this light shield layer 24 is the plane of homogeneous conductive performance.This tft layer 26 is arranged at a side of these second substrate 22 contiguous these first substrates 21.This public electrode 263 and this pixel electrode 262 are arranged between this chromatic filter layer 27 and this tft layer 26, and this pixel electrode 163 and this public electrode 162 are pectination, and alternately arrange each other.This chromatic filter layer 27 comprises the red, green, blue three color look filter units of alternately arranging.These microcapsules 28 are arranged between this chromatic filter layer 27 and this light shield layer 24.These microcapsules 28 comprise electrolytic solution and the charged particle 281 that is suspended in this electrolytic solution, and this charged particle 281 is with positive and negative electric charge.This charged particle 281 can be white particle, black particle or grizzled particle, also can be the particle of other color, as long as these charged particles 281 can stop passing through of light.In the present embodiment, this charged particle 281 is black and white, and wherein black particle is positively charged, and white particle is electronegative.
This tft layer 26 comprises thin film transistor (TFT) 261, many gate lines that are parallel to each other, many data lines that are parallel to each other and public electrode wire.Every gate line and every data line intersection form a pixel cell.In each pixel cell, the grid of this thin film transistor (TFT) 261 connects this gate line, and source electrode connects this data line, and drain electrode connects this pixel electrode.This public electrode wire and this gate line be arranged in parallel, and this public electrode wire and the electric connection of this public electrode.
See also Fig. 4, Fig. 4 is the structural representation of barrier bed 24 of the electronic ink display device 20 of integrated touch screen shown in Figure 3, and this barrier bed 24 comprises that a plurality of pieces 241, first that block block bar 242 and second and block bar 243.This block piece 241, this first, second block bar 242,243 material is conductive material, this blocks piece 241 and blocks bar 242,243 by this first, second and be electrically connected.This position of blocking piece 241 places is relative with the position at these thin film transistor (TFT) 261 places, and this first blocks that the position of bar 242 is relative with the position of this gate line, second to block the position of the position of bar 243 and this data line relative.Preferably, in the present embodiment, this blocks piece 241 and is array format and arranges, this block piece 241, this first, second block bar 242,243 material is chromium or chromium oxide, this block piece 241 and this first, second block bar 242,243 and in same operation, form.This blocks piece 241 and is used for blocking from the reflected light of the thin film transistor (TFT) 261 of this tft layer 26 and from the light leak between each pixel cell, this first blocks bar 242 and is used for blocking reflected light from this gate line, and this second blocks bar 243 and be used for blocking reflected light from this data line.
Gate line at this tft layer 26 applies conducting and the cut-off that control signal is controlled this thin film transistor (TFT) 261, and then whether the voltage on the control data line is applied to this pixel electrode 263.When pixel voltage is applied to this pixel electrode 263 by this data line, when common electric voltage is applied to this public electrode 262 by this public electrode wire, form horizontal component of electric field between this pixel electrode 263 and this public electrode 262, charged particle 281 in these microcapsules 28 is moved under the effect of this electric field and assembles, because the barrier effect of 281 pairs of light of this charged particle, in the place that this charged particle 281 is assembled, the light that this backlight 23 sends can not pass through these microcapsules 28, and the gap location between this charged particle 281, the light that this backlight 23 sends sees through these microcapsules 28.Therefore, by controlling added voltage between this pixel electrode 263 and this public electrode 262, control the transverse electric field that forms between this pixel electrode 263 and this public electrode 262, and then control arrange density and the position of these microcapsules 28 interior charged particles 281, thereby control this backlight 23 by the throughput of the light of these microcapsules 28, to reach the purpose that shows image.
The principle that electronic ink display device 20 of the present invention is realized the touching function is as follows:
See also Fig. 5, Fig. 5 is the equivalent schematic of touching circuit of the electronic ink display device 20 of integrated touch screen of the present invention.Provide to drive signal in this barrier bed 24, the response speed of this electronic ink display device 20 is lower than the driving frequency of the driving signal of this barrier bed 24.The electric field summation of the driving signal of this barrier bed 24 is zero, and preferred, AC power 31 provides the driving signal to four angles of this barrier bed 24, and this driving signal is sine wave signal or pulse square wave signal.
When this electronic ink display device 20 of touching, form an equivalent electric capacity 32 between the barrier bed 24 at A place, finger touch position and the finger, this finger is to the circuit that just forms a conducting between this AC power 31.If this touch location A is respectively R1, R2, R3, R4 to the equivalent resistance at four angles of this barrier bed 24, then the resistance value of these four resistance R 1, R2, R3, R4 is directly proportional to the distance at four angles of this barrier bed 24 with this touch location A, the electric current I 1 that forms between four angles of this touch location A and this barrier bed 24, I2, I3, I4 and this touch location A are inversely proportional to the distance at four angles of this barrier bed 24, and the size of current that namely detects four angles of these barrier beds 24 by this touch detection device 29 just can be determined the position A that this electronic ink display device 20 is touched.
Compared with prior art, the electronic ink display device 20 of integrated touch screen of the present invention blocks piece 241 with this and mutually is electrically connected formation barrier bed 24, provide the driving signal to this barrier bed 24, when touching during this electronic ink display device 20, this touch detection device 29 is by the flow through touched position of this electronic ink display device of current detecting 20 of this barrier bed 24 of detection.Because utilize this barrier bed 24 to realize the function of touch-screen, therefore, the electronic ink display device 20 of integrated touch screen of the present invention does not need additionally to increase touch-screen, thereby has reduced thickness, and has saved cost.Usually, the response speed of electric ink display screen is 100-150ms, the driving frequency of touch-screen is generally 100KHz, because electric ink display screen response speed is far below the driving frequency of this touch-screen, therefore, the electronic ink display device 20 of integrated touch screen of the present invention can't affect because of the function that increases touch-screen the demonstration of this electronic ink display device 20.In addition, owing to the electric field summation to the added driving signal of touch-screen is zero, can not affect the movement of charged particle 281 in these microcapsules 28 yet, therefore can not affect the demonstration of this electronic ink display device 20 yet.
The size of current that the touch detection device 29 of the electronic ink display device 20 of integrated touch screen of the present invention detects four angles of these barrier beds 24 just can be determined the position A that this electronic ink display device 20 is touched.The position at the place, four angles of this barrier bed 24 can be the position of blocking piece 241 places at four drift angle places of this barrier bed 24, also can be first to block four end points that bar 242 is blocked in two first of highest and lowest in the bar 242, can also be second to block the most left and the rightest two second four end points that block bar 243 in the bar 243, be not limited to above-mentioned embodiment described.
In the situation that can also consist of without departing from the spirit and scope of the present invention many very embodiment of big difference that have.Should be appreciated that except as defined by the appended claims, the invention is not restricted at the specific embodiment described in the instructions.
Claims (11)
1. the electronic ink display device of an integrated touch screen, the second substrate that comprises first substrate, is oppositely arranged with this first substrate, it is characterized in that, the barrier bed that the electronic ink display device of this integrated touch screen also comprises touch detection device and is arranged at this second substrate one side of vicinity of this first substrate, provide and drive signal in this barrier bed, when touching during this electronic ink display device, this touch detection device is by the flow through touched position of this electronic ink display device of current detecting of this barrier bed of detection;
The response frequency of this electronic ink display device is lower than the driving frequency of the driving signal of this barrier bed;
The electric field summation of the driving signal of this barrier bed is zero.
2. the electronic ink display device of integrated touch screen as claimed in claim 1, it is characterized in that: the response frequency of this electronic ink display device is 6.67-10Hz, the driving frequency of the driving signal of this barrier bed is 100KHz.
3. the electronic ink display device of integrated touch screen as claimed in claim 1, it is characterized in that: the driving signal of this barrier bed is sine wave signal or pulse square wave signal.
4. the electronic ink display device of integrated touch screen as claimed in claim 1 is characterized in that: this touch detection device is by the flow through touched position of this electronic ink display device of current detecting at four angles of this barrier bed of detection.
5. the electronic ink display device of integrated touch screen as claimed in claim 1 is characterized in that: this barrier bed comprises that a plurality of pieces, first that block block bar and second and block bar, and these are a plurality of to block piece and block bar by this first, second and mutually be electrically connected.
6. the electronic ink display device of integrated touch screen as claimed in claim 5, it is characterized in that: this material that blocks piece is chromium or chromium oxide, and this light shield layer 24 is the plane of homogeneous conductive performance.
7. the electronic ink display device of integrated touch screen as claimed in claim 6 is characterized in that: this first, second block bar material be chromium or chromium oxide, this first, second block bar and this and block in the same operation of piece and form.
8. the electronic ink display device of integrated touch screen as claimed in claim 5, it is characterized in that: the electronic ink display device of this integrated touch screen also comprises tft layer, pixel electrode, public electrode and the chromatic filter layer that is arranged between this first, second substrate, this tft layer is arranged at a side of contiguous this first substrate of this second substrate, this pixel electrode, public electrode are arranged between this tft layer and this chromatic filter layer, this pixel electrode and this public electrode are pectination, and alternately arrange each other.
9. the electronic ink display device of integrated touch screen as claimed in claim 8, it is characterized in that: this tft layer comprises thin film transistor (TFT), gate line and data line, this position of blocking piece is relative with the position at this thin film transistor (TFT) place, and this first blocks that the position of bar is relative with the position of this gate line, second to block the position of the position of bar and this data line relative.
10. the electronic ink display device of integrated touch screen as claimed in claim 8, it is characterized in that: the electronic ink display device of this integrated touch screen also comprises a plurality of microcapsules that are arranged between this chromatic filter layer and this barrier bed, comprises a plurality of charged particles in each microcapsules.
11. the electronic ink display device of integrated touch screen as claimed in claim 1 is characterized in that: the electronic ink display device of this integrated touch screen is the electronic ink display device of transverse electric field display type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910195873 CN102023450B (en) | 2009-09-18 | 2009-09-18 | Electronic ink display device integrated with touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910195873 CN102023450B (en) | 2009-09-18 | 2009-09-18 | Electronic ink display device integrated with touch screen |
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| Publication Number | Publication Date |
|---|---|
| CN102023450A CN102023450A (en) | 2011-04-20 |
| CN102023450B true CN102023450B (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910195873 Active CN102023450B (en) | 2009-09-18 | 2009-09-18 | Electronic ink display device integrated with touch screen |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI451181B (en) * | 2011-05-02 | 2014-09-01 | E Ink Holdings Inc | An electronic paper display apparatus with touch control function |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5548306A (en) * | 1994-04-28 | 1996-08-20 | At&T Global Information Solutions Company | Visible and touchable touch screen shield |
| TW493137B (en) * | 2000-03-31 | 2002-07-01 | Nissha Printing | Touch panel with light-shielding peripheral edges |
| JP2008165435A (en) * | 2006-12-27 | 2008-07-17 | Lg Display Co Ltd | Touch panel device |
-
2009
- 2009-09-18 CN CN 200910195873 patent/CN102023450B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5548306A (en) * | 1994-04-28 | 1996-08-20 | At&T Global Information Solutions Company | Visible and touchable touch screen shield |
| TW493137B (en) * | 2000-03-31 | 2002-07-01 | Nissha Printing | Touch panel with light-shielding peripheral edges |
| JP2008165435A (en) * | 2006-12-27 | 2008-07-17 | Lg Display Co Ltd | Touch panel device |
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| CN102023450A (en) | 2011-04-20 |
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