CN101498849A - Hand-written LCD - Google Patents
Hand-written LCD Download PDFInfo
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- CN101498849A CN101498849A CNA2008100571426A CN200810057142A CN101498849A CN 101498849 A CN101498849 A CN 101498849A CN A2008100571426 A CNA2008100571426 A CN A2008100571426A CN 200810057142 A CN200810057142 A CN 200810057142A CN 101498849 A CN101498849 A CN 101498849A
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Abstract
The invention relates to a liquid crystal display used at an information terminal, in particular to a backlight plate of a handwriting input display. The technique scheme is as follows: a display module and a handwriting input device are overlapped; a backlight source of the display module is a LED backlight module and the handwriting input device is an electromagnetic handwriting input module which comprises a handwriting input plate and a handwriting input pen; the handwriting pen works in a non-power working style; the electromagnetic handwriting input plate is arranged in the display module and can also be arranged out of the display module as a touch screen. The liquid crystal display used at an information terminal has the advantages of having a simple structure, meeting the demanding of environmental protection, having no electromagnetic interference especially and raising the stability and reliability of handwriting input.
Description
Technical field
The present invention is the LCD that a kind of usefulness is gone into information terminal, particularly a kind of backlight of handwriting input display.
Background technology
Display is one of key equipment of computing machine and out of Memory terminal, it is an output device, equally, computing machine also needs input equipment to finish the input of information, normally import by keyboard, and handwriting pad and microphone etc., scheme that above-mentioned technology is optimized has just appearred in the prior art, as the disclosed technical scheme of Chinese patent CN200310121246, it is to the effect that: the liquid crystal indicator that a display pattern is arranged, and be used for detecting the stylus position and digital quantizer that be positioned at the liquid crystal indicator below, digital quantizer comprises the sensor board that is positioned at the liquid crystal indicator below, be used for generating electromagnetic waves and detect electromagnetic wave from stylus, passivation layer is arranged and a housing is arranged at liquid crystal surfactant to detect the position of stylus.Simultaneously, also be mentioned to a such scheme in U.S. Pat 4947156, be provided with one writing input board in display board, handwriting pad can obtain and converted coordinate.
Used display is a LCD in the prior art, the technical scheme of being mentioned as Chinese patent CN03238848, wherein display all has a backlight, generally all be to adopt the CCFL back light system, and the fluorescent tube of this light source has a certain amount of material mercury, environment is had pollution, and energy consumption is higher.
Particularly above-mentioned scheme all has electromagnetic interference (EMI), and is when putting together work with the electromagnetic type handwriting input device, very strong to the interference of handwriting input device.Thereby the prior art scheme awaits to improve with perfect at present.
Wherein, CCFL adopts the English Cold Cathode FluorescentLamps of cold-cathode fluorescent to be called for short.
Summary of the invention
Purpose of the present invention just provides a kind of environmental requirement that promptly conforms to, and does not produce LCD electromagnetic interference (EMI), that be used for handwriting input again.
Technical scheme of the present invention is:
Display module, hand input device stack are placed, and the backlight of display module is the LED-backlit module;
Hand input device is induction handwriting device, comprises writing input board and handwriting input pen, and writing input board has a plurality of coils, and writing input board can produce and launch the signal with certain frequency;
Handwriting input pen does not have direct supply, and handwriting input pen can be received signal and return signal from writing input board by the circuit that electric capacity and inductance are formed by the circuit of being made up of electric capacity and inductance;
Writing input board can receive the signal that handwriting input pen returns, and obtains the position of writing pencil and the information of pressure with this;
Writing input board received signal frequency is identical with emission signal frequency;
Writing input board can transmit and receive signal, and signal is is alternately transmitted and received by the same coil in the writing input board.
Another kind of preferred version:
Display module, hand input device stack are placed, and the backlight of display module is the LED-backlit module;
Hand input device is induction handwriting device, comprises writing input board and handwriting input pen, and writing input board has a plurality of coils, and writing input board can produce and launch the signal with certain frequency;
Handwriting input pen does not have direct supply, and handwriting input pen can be received signal and return signal from writing input board by the circuit that electric capacity and inductance are formed by the circuit of being made up of electric capacity and inductance;
Writing input board can receive the signal that handwriting input pen returns, and obtains the position of writing pencil and the information of pressure with this;
Writing input board received signal frequency is the multiple of emission signal frequency;
Writing input board is transmitted and received signal simultaneously by two different coils;
Also have a kind of preferred version:
Display module, hand input device stack are placed, and the backlight of display module is the LED-backlit module, and hand input device is touch hand-written module.
Wherein, LED is the abbreviation of the English light emitting diode of light emitting diode.
Advantage of the present invention and effect are: simple in structure, conform to environmental protection requirement, and particularly there is not electromagnetic interference (EMI), can well improve the stability and the reliability of handwriting input.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is the side diagrammatic cross-section of the hand-written LCD embodiment one that proposes of the present invention;
Fig. 2 is the side diagrammatic cross-section of the hand-written LCD embodiment two that proposes of the present invention.
Illustrate among the figure: 1, housing; 2, display module; 3, the LED-backlit module in the display module (is called for short: the LED-backlit module); 4, writing input board; 5, protective layer; 6, handwriting input pen; 7, touch-screen; 8, screen layer.
Embodiment
A kind of hand-written LCD is used for handwriting input, particularly the computer painting field.The core of hand-written LCD mainly is display module and hand input device.
Embodiment one:
In the present embodiment, the backlight of display module 2 is a LED-backlit module 3, and in housing 1, display module 2,4 stacks of writing input board are placed, and see accompanying drawing 1.
In the present embodiment, hand input device is induction handwriting device, comprises the writing input board 4 that contains a plurality of coils, and the handwriting input pen 6 that can send signal.Writing input board 4 can produce and received signal, being exactly more more specifically: writing input board 4 has a plurality of coils, comprise a plurality of coils on the both direction, writing input board 4 can produce and launch the signal with certain frequency, and handwriting input pen 6 does not have direct supply to power separately, but handwriting input pen 6 is by the circuit of being made up of electric capacity and inductance, can this circuit receive signal from writing input board 4, produce induced oscillation and return signal, writing input board 4 changes according to the power of the signal that returns, or frequency, the working position and the pressure condition of handwriting input pen 6 calculated in the variation of phase place.
Writing input board 4 can transmit and receive signal, because the received signal frequency is identical with emission signal frequency, same coils in the writing input board 4 are that the origin alternating movement is finished and transmitted and received like this, and described in this article frequency is identical, also comprises basic approximate situation.
Simultaneously, in another technical scheme, most of with above-mentioned technology is identical, difference is: the relation that can be set to received signal frequency and emission signal frequency multiple, writing input board received signal frequency is that the multiple frequency of emission signal frequency is an odd-multiple, as 3 multiples, transmit simultaneously and received signal by two different coils, as finishing emission by the coil on the direction, coil by another direction is finished reception, like this, just can finish having transmitted simultaneously, improve efficient and speed with received signal.
Can select different working methods according to the real work situation.
As shown in Figure 1, writing input board 4 is arranged on the inboard of LED-backlit module 3, because the characteristic of LED-backlit module 3 can not produce writing input board 4 and disturb.
In order to guarantee liquid crystal display generation scuffing not to be waited infringement, protective layer 5 is arranged in the outside of display module 2 in work.
Embodiment two:
In the present embodiment, the backlight of display module 2 is also same as the previously described embodiments, is LED-backlit module 3, and difference is the handwriting input module, be touch-screen type handwriting input module, as touch-screen type handwriting input mode, see touch-screen 7 in the accompanying drawing 2, can be four lines or five-line resistance screen, also can be capacitance plate, when writing on touch-screen 7 surfaces,, calculate the position of hand-written contact according to the variation of voltage with finger or other input pen.
Simultaneously, above-mentioned touch-screen 7 also can be the photo-electric touch-screen, and various sound wave type touch-screen.
More reliable for hand input device can working properlyly be reached, in embodiment one and embodiment two, screen layer 8 is arranged near housing 1 side.
By above technical scheme, promptly can reach environmental protection of the present invention, glitch-free fundamental purpose.
Claims (11)
1, a kind of hand-written LCD contains display module, housing, hand input device, it is characterized in that:
Display module, hand input device stack are placed;
The backlight of display module is the LED-backlit module;
Hand input device is induction handwriting device, comprises writing input board and handwriting input pen;
Writing input board has many group coils, and writing input board can produce and launch the signal with certain frequency;
Handwriting input pen does not have direct supply;
Handwriting input pen can be received signal and return signal from writing input board by the circuit that electric capacity and inductance are formed by the circuit of being made up of electric capacity and inductance;
Writing input board can receive the signal that handwriting input pen returns, and obtains the position of writing pencil and the information of pressure with this.
2, hand-written LCD as claimed in claim 1 is characterized in that: described writing input board received signal frequency is identical with emission signal frequency.
3, hand-written LCD as claimed in claim 1 is characterized in that: described writing input board can transmit and receive signal, and signal is is alternately transmitted and received by the same coil in the writing input board.
4, a kind of hand-written LCD is characterized in that:
Display module, hand input device stack are placed;
The backlight of display module is the LED-backlit module;
Hand input device is induction handwriting device, comprises writing input board and handwriting input pen;
Writing input board has a plurality of coils, and writing input board can produce and launch the signal with certain frequency;
Handwriting input pen does not have direct supply;
Handwriting input pen can be received signal and return signal from writing input board by the circuit that electric capacity and inductance are formed by the circuit of being made up of electric capacity and inductance;
Writing input board can receive the signal that handwriting input pen returns, and obtains the position of writing pencil and the information of pressure with this.
Writing input board received signal frequency is the multiple of emission signal frequency.
5, hand-written LCD as claimed in claim 4 is characterized in that: the multiple frequency that described writing input board received signal frequency is an emission signal frequency is an odd-multiple, as 3 multiples.
6, hand-written LCD as claimed in claim 4 is characterized in that: described writing input board can be transmitted and received signal simultaneously by two different coils.
7, a kind of hand-written LCD contains display module, housing, hand input device, it is characterized in that:
Display module, hand input device stack are placed;
The backlight of display module is the LED-backlit module;
Hand input device is touch hand-written module.
8, hand-written LCD according to claim 7 is characterized in that: the handwriting input module is a resistive touch handwriting input module.
9, hand-written LCD according to claim 7 is characterized in that: the handwriting input module is the hand-written module of capacitance touch.
10, hand-written LCD according to claim 7 is characterized in that: the handwriting input module is that photo-electric touches hand-written module.
11, hand-written LCD according to claim 7 is characterized in that: the handwriting input module is that sound wave type touches hand-written module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100571426A CN101498849A (en) | 2008-01-30 | 2008-01-30 | Hand-written LCD |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100571426A CN101498849A (en) | 2008-01-30 | 2008-01-30 | Hand-written LCD |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101498849A true CN101498849A (en) | 2009-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100571426A Pending CN101498849A (en) | 2008-01-30 | 2008-01-30 | Hand-written LCD |
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| Country | Link |
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| CN (1) | CN101498849A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011124138A1 (en) * | 2010-04-08 | 2011-10-13 | Lin Huan | Inductive touch led module |
| CN102253755A (en) * | 2011-08-31 | 2011-11-23 | 湖南长城信息金融设备有限责任公司 | Pressure-induction handwriting display screen |
| CN102478185A (en) * | 2010-11-23 | 2012-05-30 | 深圳市瀚达美电子有限公司 | Ultrathin inductance type LED (light emitting diode) backlight source module with touch control function |
| CN105879184A (en) * | 2016-04-01 | 2016-08-24 | 新乡医学院 | Electronic writing device with examination anxiety resisting function |
| CN106980207A (en) * | 2017-05-12 | 2017-07-25 | 广州视源电子科技股份有限公司 | Direct type backlight display module and display equipment |
| WO2018205483A1 (en) * | 2017-05-12 | 2018-11-15 | 广州视源电子科技股份有限公司 | Direct-type backlight display module and display device |
-
2008
- 2008-01-30 CN CNA2008100571426A patent/CN101498849A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011124138A1 (en) * | 2010-04-08 | 2011-10-13 | Lin Huan | Inductive touch led module |
| CN102478185A (en) * | 2010-11-23 | 2012-05-30 | 深圳市瀚达美电子有限公司 | Ultrathin inductance type LED (light emitting diode) backlight source module with touch control function |
| CN102253755A (en) * | 2011-08-31 | 2011-11-23 | 湖南长城信息金融设备有限责任公司 | Pressure-induction handwriting display screen |
| CN105879184A (en) * | 2016-04-01 | 2016-08-24 | 新乡医学院 | Electronic writing device with examination anxiety resisting function |
| CN106980207A (en) * | 2017-05-12 | 2017-07-25 | 广州视源电子科技股份有限公司 | Direct type backlight display module and display equipment |
| WO2018205484A1 (en) * | 2017-05-12 | 2018-11-15 | 广州视源电子科技股份有限公司 | Direct-type backlight display module and display device |
| WO2018205483A1 (en) * | 2017-05-12 | 2018-11-15 | 广州视源电子科技股份有限公司 | Direct-type backlight display module and display device |
| CN106980207B (en) * | 2017-05-12 | 2023-09-01 | 广州视源电子科技股份有限公司 | Direct type backlight display module and display equipment |
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Open date: 20090805 |