CN211181606U - Mechanical scanning device for large-size electronic whiteboard - Google Patents
Mechanical scanning device for large-size electronic whiteboard Download PDFInfo
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- CN211181606U CN211181606U CN201922476571.3U CN201922476571U CN211181606U CN 211181606 U CN211181606 U CN 211181606U CN 201922476571 U CN201922476571 U CN 201922476571U CN 211181606 U CN211181606 U CN 211181606U
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Abstract
The utility model relates to a jumbo size, low-speed, non-self-luminous display device, a be used for jumbo size electronic whiteboard mechanical scanning device, adopt the mode of mechanical scanning to replace thin film transistor TFT layer, which comprises a plate body (1), be in guide rail (2) at plate body (1) back, install scan rack (3) on guide rail (2), if install on scan rack (3) each scanning unit (8), a drive arrangement, control circuit, drive arrangement drives scan rack (3) and is reciprocating linear motion in the plane that is on a parallel with plate body (1) under the restraint of guide rail (2), control circuit is through connecting scanning unit (8), and control scanning unit (8) accomplish the scanning to plate body (1).
Description
Technical Field
The utility model relates to a jumbo size, low-speed, non-self-luminous display device especially relate to the display device of classroom blank, indoor outer accurate dynamic advertisement.
Background
In recent years, the novel display technology such as electronic paper using bistable display technology as support has unique advantages of no self-luminescence, low power consumption, being beneficial to eye health and the like, and is widely applied in the reading field. Chinese patents CN 103176325A (electronic paper display device), CN 107065374B (an array substrate of electronic paper, electronic paper and its driving method), CN 103972241B (array substrate of electronic paper and its manufacturing method and electronic paper) are all related to electronic paper applications. However, these display devices are driven by TFTs (thin film transistors), which results in complicated and expensive manufacturing processes and makes it difficult to manufacture large-sized display devices. Heretofore, readers using electronic paper have been only 10 inches or less in size. Commercial displays are also available in products below 42 inches. Due to the good reading experience of non-self-luminous display devices such as electronic paper, the display devices are very suitable for teaching application, the characteristic of low power consumption is very suitable for outdoor advertising, and the fields urgently need large-size display devices.
Fig. 7 is a schematic diagram illustrating a display principle of the electrophoretic electronic paper. The electrophoretic electronic paper is formed by coating electronic ink consisting of tiny particles on a substrate, wherein the electronic ink particles are formed by sealing a plurality of black and white particles which are respectively charged with positive electricity and negative electricity in microcapsules filled with liquid, and the charged particles with different colors move towards different directions due to different applied electric fields, so that the black or white effect is presented on the surface of a display screen. In general, in order to apply an electric field to these particles, a TFT (thin film transistor) layer (bottom electrode in the drawing) needs to be provided on the bottom of the particle layer, and a control circuit controls the electric field applied to the electronic ink by controlling on and off of the transistor on the TFT layer. Because the TFT (thin film transistor) layer is produced by adopting a semiconductor process, the price of large-size TFT production equipment is very high, and the market of bistable display equipment is relatively small, so that a large-size electronic ink screen is not available in the market at present.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: how to provide a mechanical scanning device for a large-size electronic whiteboard.
The utility model adopts the technical proposal that: the utility model provides a be used for jumbo size electronic whiteboard mechanical scanning device, adopt the mode of mechanical scanning to replace thin-film transistor TFT layer, including plate body (1), be in guide rail (2) at plate body (1) back, install scanning frame (3) on guide rail (2), if each scanning unit (8) of installing on scanning frame (3), drive arrangement, control circuit, drive arrangement drives scanning frame (3) and does reciprocating linear motion in the plane that is on a parallel with plate body (1) under the restraint of guide rail (2), control circuit is through connecting scanning unit (8), and control scanning unit (8) accomplish the scanning to plate body (1).
The scanning unit (8) is longitudinally arranged on the scanning frame (3), and the scanning unit (8) is an electric field scanning unit or a magnetic field scanning unit.
The electric field scanning unit comprises a switching printed circuit board (801), a switching board compression spring (802), a conducting strip compression cover plate (803), a longitudinal conducting strip (804) is isolated, and a cable connector (805), wherein the conducting strip compression cover plate (803) is fixed on the switching printed circuit board (801), the longitudinal conducting strip (804) is isolated and fixed on the conducting strip compression cover plate (803), the switching printed circuit board (801) is elastically connected onto a scanning frame (3) through the compression spring (802), the back of the longitudinal conducting strip (804) and the back of a board body (1) are isolated to be in close contact with each other, the longitudinal conducting strip (804) is isolated and connected onto the cable connector (805) through a wire, and the cable connector (805) is connected to a.
The isolated longitudinal conducting strip (804) is formed by alternately stacking conducting layers (8041) and insulating layers (8042), the conducting layers (8041) are made of conducting rubber, and the insulating layers (8042) are made of non-conducting rubber. To reduce friction against the plate body, but other materials and means may be used.
The two ends of the scanning frame (3) are in sliding connection with the guide rail (2), a row of supporting columns are fixed on the scanning frame (3) side by side, the conducting strip pressing cover plate (803) is a flat plate, sliding grooves with the same number as the supporting strips are formed in the conducting strip pressing cover plate, the supporting columns are inserted into the sliding grooves in a one-to-one correspondence mode, an adapter plate pressing spring (802) is sleeved on each supporting column, and the two ends of the adapter plate pressing spring (802) are fixed on the conducting strip pressing cover plate (803).
The driving device comprises a driving motor (4), a motor driving belt (5), a transmission shaft (6) and a scanning frame driving belt (7), wherein two transmission shafts (6) are respectively fixed on two sides of the plate body (1) through bearings, a driving shaft of the transmission shaft (6) is connected with the driving motor (4) through the motor driving belt (5), the scanning frame driving belt (7) is connected on two sides of the driving shaft and a driven shaft of the transmission shaft (6), two ends of the scanning frame (3) are columnar, the guide rail (2) is two rectangular plates respectively fixed on two sides of the plate body (1), each rectangular plate is provided with a runway groove, two ends of the scanning frame (3) are respectively inserted into one runway groove, the middle part of the scanning frame is fixed on the scanning frame driving belt (7), driven by a driving motor (4), the scanning frame (3) makes reciprocating linear motion in a plane parallel to the plate body (1) under the constraint of the guide rail (2).
The control circuit is composed of a plurality of groups of drive parts which adopt circuits of Totem-pole output, when the control input is high voltage, T1 is conducted, T2 is cut off, the output is positive voltage, when the control input is low voltage, T1 is cut off, T2 is conducted, the output is negative voltage, through the action of an isolation longitudinal conducting strip (804) electrically connected with the control circuit, when the output is high voltage, positive charge is generated at the corresponding part of the plate body (1), when the drive control output is low voltage, negative charge is generated at the corresponding part of the plate body, the distribution of display particles of the plate body (1) is further changed, corresponding display is formed, after the scanning frame (3) moves through, the display state is kept unchanged due to the characteristic of a bistable display device until the next scanning refreshing.
The plate body (1) is a bistable display material in electrophoresis type, cholesterol liquid crystal type and magnetophoresis type.
The plate body (1) is composed of an induction layer (101), a reinforcing layer (102), a common layer (103), a display layer (104) and a wear-resistant layer (105) which are sequentially connected, the induction layer (101) adopts one induction scheme of infrared, capacitance and ultrasound, the reinforcing layer (102) adopts any transparent material without electromagnetic shielding effect, the common layer (103) adopts a conductive and light-transmitting material, the display layer (104) adopts an electrophoresis type electronic ink screen and an electric field driven bistable display material layer in a cholesterol liquid crystal type electronic ink screen or a magnetophoresis type display material, and the wear-resistant layer (105) adopts a wear-resistant material without electromagnetic shielding effect and small sliding resistance.
The induction layer (101) is used for inducing human writing, the reinforcing layer (102) is one of glass, PC (polycarbonate), PC (polyethylene) and PET (polyethylene terephthalate), and the common layer (103) is ITO glass or an ITO film.
The utility model has the advantages that: the mechanical scanning mode is adopted to replace a TFT (thin film transistor) layer, and the mechanical scanning speed is greatly lower than the electronic scanning speed of the TFT, so that the mechanical scanning device is suitable for occasions which do not need quick refreshing, such as teaching and quasi-dynamic advertising, but the mechanical scanning device is low in cost and is very suitable for manufacturing large-scale display devices based on bistable display materials such as electronic paper and the like, and the large-scale display devices are small in batch and large in size.
Drawings
FIG. 1 is a schematic view of the entire embodiment of the present invention;
FIG. 2 is a view showing the structure of an electric field scanning unit;
FIG. 3 is a perspective view of an electric field scanning unit;
FIG. 4 is a schematic view of an isolated longitudinal conductive strip structure;
FIG. 5 is a schematic diagram of a totem-pole output circuit;
fig. 6 is a schematic structural view of a plate body;
FIG. 7 is a schematic view of the display principle of the electrophoretic electronic paper;
the scanning device comprises a plate body 1, a plate body 101, an induction layer 102, a reinforcing layer 103, a public layer 104, a display layer 105, a wear-resistant layer 2, a guide rail 3, a scanning frame 4, a driving motor 5, a motor transmission belt 6, a transmission shaft 7, a scanning frame transmission belt 8, a scanning unit 801, a switching printed circuit board 802, a switching plate compression spring 803, a conducting plate compression cover plate 804, a keeping isolation longitudinal conducting plate 805, a cable connector, 8041, a conducting layer 8042 and an insulating layer.
Detailed Description
The following describes the implementation of the present invention in combination with the embodiments of the present invention. The described embodiments are only some, but not all embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment adopts the electron white version of electrophoresis display material, fig. 1 is the utility model discloses whole schematic diagram, wherein plate body 1 comprises multilayer material, the structure is shown in fig. 6, plate body (1) is by the response layer 101 of sequence connection, the enhancement layer 102, public layer 103, show layer 104, wearing layer 105 constitutes, response layer 101 adopts the electric capacity induction scheme for respond to people's writing, the enhancement layer 102 adopts PC (polycarbonate), public layer 103 adopts ITO glass, show layer 104 adopts electrophoresis type electronic ink screen material, wearing layer 105 adopts rubber. The length of the plate body 1 may be several meters. The sensing layer 101 may be provided as needed. The sensing layer may not be provided as required.
The upper and lower both sides of plate body 1 are fixed with frame guide rail 2 (two rectangle frames that take the runway groove), guide rail 2 adopts aluminum alloy or other materials that have higher intensity to constitute, both ends set up transmission shaft 6 about frame guide rail 2, wherein the left side is the initiative transmission shaft, the initiative transmission shaft passes through motor drive belt 5 and is connected with driving motor 4, the scanning frame drive belt that the transmission wire rope that initiative transmission shaft 6 passes through frame guide rail 2 constitutes drives the scanning frame 3 that runs through plate body 1 and is straight reciprocating motion at the back of plate body 1, accomplish the scanning.
A plurality of groups of electric field scanning units 8 are fixed on the scanning frame 3, each scanning unit 8 comprises an adapting printed circuit board 801, an adapting plate pressing spring 802, a conducting strip pressing cover plate 803, an isolating longitudinal conducting strip 804, a cable connector 805 and the like, and the electric field scanning units keep the isolating longitudinal conducting strip 804 in close contact with the plate body 1 by means of the adapting plate pressing springs 802.
The isolated longitudinal conductive sheet 804 is formed by stacking a conductive rubber layer (conductive layer 8041) and a non-conductive rubber layer (insulating layer 8042), and the thickness and width of each layer are selected according to the requirement of display precision, which is 0.5mm in this embodiment.
The isolated longitudinal conductive strips 804 are connected to the control and drive circuitry via cable connectors 805 on the patch printed wiring board 801.
The output structure of the driving circuit is totem-pole output, so that positive and negative voltages can be output.
The driving circuit outputs positive or negative voltage under the action of the control circuit, the voltage can be tens of volts to hundreds of volts, and the voltage is determined by the thickness of the wear-resistant layer. This embodiment is 48V. The outputted reference potential (ground) is connected to the common electrode layer (common layer 103) of the board body.
Due to the use of bistable display materials, the display is normally maintained in a fixed state, and when the display content needs to be changed, it is refreshed by scanning.
When refreshing display, the scanning frame 3 reciprocates on the back of the board surface 1 under the action of the driving motor 4, and refreshes row by row. When the scanning frame 3 is located in a certain row, the control circuit extracts the pixels which need to be displayed in the longitudinal direction of the row to form a row of dot matrix information consisting of hundreds to thousands of dots, and the row image which is corresponding to the position is displayed. Then, the control circuit sends the column dot matrix information to a Totem-pole, converts the column dot matrix information into corresponding voltage, sends the voltage to the isolated longitudinal conducting strip 804 through the cable connector 805, forms electric field distribution corresponding to the column dot matrix pattern on the back surface of the plate body 1, and the micro particles in the display material on the plate body 1 are reversed according to the polarity of the electric field to form the pattern on the plate surface. The gantry 3 continues to move to the position of the next column, driving the display of the next column as required. Thus, the image display of the whole layout can be formed after the whole layout is scanned. The scanning speed can be set according to the display requirements, and the range is between a few meters and dozens of meters per minute.
Claims (8)
1. A mechanical scanning device for a large-size electronic whiteboard is characterized in that: adopt the mode of mechanical scanning to replace thin-film transistor TFT layer, the package rubbing board body (1), be in guide rail (2) at the plate body (1) back, install scanning frame (3) on guide rail (2), if each scanning unit (8) of installing on scanning frame (3), drive arrangement, control circuit, drive arrangement drives scanning frame (3) and does reciprocating linear motion in the plane that is on a parallel with plate body (1) under the restraint of guide rail (2), control circuit is through connecting scanning unit (8), and control scanning unit (8) accomplish the scanning to plate body (1).
2. A mechanical scanning device for large-sized electronic whiteboard according to claim 1, wherein: drive arrangement includes driving motor (4), motor drive belt (5), transmission shaft (6), scanning frame drive belt (7), transmission shaft (6) have two to pass through the bearing respectively and fix the both sides in plate body (1), the driving shaft of transmission shaft (6) passes through motor drive belt (5) and connects driving motor (4), the driving shaft and the driven shaft both sides at transmission shaft (6) are connected in scanning frame drive belt (7), the both ends of scanning frame (3) become the column, two rectangular plates of guide rail (2) for being fixed in plate body (1) both sides respectively, there is a runway groove on every rectangular plate, insert respectively in a runway groove at the both ends of scanning frame (3), the middle part of scanning frame is fixed on scanning frame drive belt (7).
3. A mechanical scanning device for large-sized electronic whiteboard according to claim 1, wherein: the plate body (1) is composed of an induction layer (101), a reinforcing layer (102), a common layer (103), a display layer (104) and a wear-resistant layer (105) which are sequentially connected.
4. A mechanical scanning device for large-sized electronic whiteboard according to claim 1, wherein: the scanning unit (8) is longitudinally arranged on the scanning frame (3), and the scanning unit (8) is an electric field scanning unit or a magnetic field scanning unit.
5. A mechanical scanning device for large-sized electronic whiteboard according to claim 4, wherein: the electric field scanning unit comprises a switching printed circuit board (801), a switching board compression spring (802), a conducting strip compression cover plate (803), a longitudinal conducting strip (804) is isolated, and a cable connector (805), wherein the conducting strip compression cover plate (803) is fixed on the switching printed circuit board (801), the longitudinal conducting strip (804) is isolated and fixed on the conducting strip compression cover plate (803), the switching printed circuit board (801) is elastically connected onto a scanning frame (3) through the compression spring (802), the back of the longitudinal conducting strip (804) and the back of a board body (1) are isolated to be in close contact with each other, the longitudinal conducting strip (804) is isolated and connected onto the cable connector (805) through a wire, and the cable connector (805) is connected to a.
6. A mechanical scanning device for large-sized electronic whiteboard according to claim 5, wherein: keep apart vertical conducting strip (804) and constitute by conducting layer (8041) and insulating layer (8042) stack in turn, conducting layer (8041) selects conductive rubber, insulating layer (8042) adopt non-conductive rubber, the both ends of scan frame (3) constitute sliding connection with guide rail (2), be fixed with a row of support column side by side on scan frame (3), conducting strip compresses tightly apron (803) and is a flat board, have on it and support the same spout of living quantity, the support column all corresponds one-to-one and inserts in a spout, it compresses tightly spring (802) to overlap on every support column, the both ends of adapter plate pressure spring (802) are fixed on conducting strip pressure apron (803).
7. A mechanical scanning device for large-size electronic whiteboards according to claim 5 or claim 6, characterized in that: the control circuit is composed of a plurality of groups of drive parts which adopt circuits of Totem-pole output, when the control input is high voltage, T1 is conducted, T2 is cut off, the output is positive voltage, when the control input is low voltage, T1 is cut off, T2 is conducted, the output is negative voltage, through the action of an isolation longitudinal conducting strip (804) electrically connected with the control circuit, when the output is high voltage, positive charge is generated at the corresponding part of the plate body (1), when the drive control output is low voltage, negative charge is generated at the corresponding part of the plate body, the distribution of display particles of the plate body (1) is further changed, corresponding display is formed, after the scanning frame (3) moves through, the display state is kept unchanged due to the characteristic of a bistable display device until the next scanning refreshing.
8. A mechanical scanning device for large-sized electronic whiteboard according to claim 7, wherein: the induction layer (101) is used for inducing human writing, the reinforcing layer (102) is one of glass, polycarbonate, polyethylene and polyethylene terephthalate, and the common layer (103) is ITO glass or an ITO film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922476571.3U CN211181606U (en) | 2019-12-31 | 2019-12-31 | Mechanical scanning device for large-size electronic whiteboard |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922476571.3U CN211181606U (en) | 2019-12-31 | 2019-12-31 | Mechanical scanning device for large-size electronic whiteboard |
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| Publication Number | Publication Date |
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| CN211181606U true CN211181606U (en) | 2020-08-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111048047A (en) * | 2019-12-31 | 2020-04-21 | 太原智林信息技术股份有限公司 | Mechanical scanning device for large-size electronic whiteboard |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111048047A (en) * | 2019-12-31 | 2020-04-21 | 太原智林信息技术股份有限公司 | Mechanical scanning device for large-size electronic whiteboard |
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Address after: 030001 9-10 / F, East Building, Hongtai international building, 75 Longcheng street, Xiaodian District, Taiyuan City, Shanxi Province Patentee after: Zhilin Information Technology Co.,Ltd. Address before: 030001 9-10 / F, East Building, Hongtai international building, 75 Longcheng street, Xiaodian District, Taiyuan City, Shanxi Province Patentee before: Taiyuan Zhilin Information Technology Co.,Ltd. |