CN212675330U - Spliced display screen and display device - Google Patents
Spliced display screen and display device Download PDFInfo
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- CN212675330U CN212675330U CN202021934842.1U CN202021934842U CN212675330U CN 212675330 U CN212675330 U CN 212675330U CN 202021934842 U CN202021934842 U CN 202021934842U CN 212675330 U CN212675330 U CN 212675330U
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Abstract
A spliced display screen and display equipment comprise a plurality of display modules, an electrochromic film and a control circuit, wherein the display modules are spliced and assembled, and a splicing seam is formed between every two adjacent display modules; the electrochromic film is arranged on the light emitting surfaces of the display modules and covers the splicing seams; the control circuit is electrically connected with the electrochromic film and used for controlling the electrochromic film to switch between a transparent state and a pure color state according to the bright screen and the extinguished screen of the display module. The electrochromic film is arranged on the light emitting surface of the spliced display screen, and the control circuit controls the electrochromic film to be switched between a transparent state and a pure color state according to the bright screen and the dark screen of the spliced display screen, so that when the display module is extinguished, the electrochromic film is pure color to cover the splicing seams of the spliced display screen and the uneven color difference of the sealing glue; when the display module is bright, the control circuit controls the electrochromic film to be changed from a pure color state to a transparent state, so that human eyes can observe the patterns of the display screen.
Description
Technical Field
The utility model relates to a show technical field, especially relate to a concatenation display screen and display device.
Background
The splicing display is a display system which realizes non-single-screen ultrahigh resolution and ultra-large pictures through hardware and software and has a comprehensive application platform, and is generally formed by splicing and combining display modules. The tiled display is used as a modern video tool, and has been widely applied to various fields, such as large-scale post and telecommunications systems, broadcast television shows, security monitoring, military command, industrial process control, traffic management command, police command and monitoring, various production scheduling, communication network management, energy distribution and transportation, and the like. The large-screen splicing display can intensively display signals from various signal sources such as video and networks, so as to meet the requirement of a user for displaying various shared information and comprehensive information in a large area. However, at present, all large-sized tiled display screens are formed by splicing one small lamp panel, so that human eyes can obviously observe the uneven color difference of the splicing seams and the sealing glue on the screens when in close-range observation, and the visual perception is influenced.
Therefore, how to cover up the uneven color difference of the splicing seams and the sealing glue of the spliced display screen and improve the visual perception has important significance for the development of the display technology.
SUMMERY OF THE UTILITY MODEL
In view of the above deficiencies of the prior art, an object of the present application is to provide a tiled display screen, which aims to solve the problems of uneven color difference of the tiled display screen and the splicing seam.
The application provides a spliced display screen which comprises a plurality of display modules, wherein the display modules are spliced and assembled, and a splicing seam is formed between every two adjacent display modules; the electrochromic film is arranged on the light emitting surfaces of the display modules and covers the splicing seams; the control circuit is electrically connected with the electrochromic film and used for controlling the electrochromic film to be in a transparent state or a pure color state matched with the display module; when a plurality of display modules are lightened, the electrochromic film is in the transparent state; when the display modules are turned off, the electrochromic film is in a pure color state matched with the display modules.
The electrochromic film is arranged on the light emitting surface of the spliced display screen, and the control circuit controls the electrochromic film to be switched between a transparent state and a pure color state according to the bright screen and the dark screen of the spliced display screen, so that when the display module is turned off, the electrochromic film is pure color, and the effects of uneven color difference of splicing seams and sealing glue of the spliced display screen are covered; when the display module is bright, the control circuit controls the electrochromic film to be changed from a pure color state to a transparent state, so that human eyes can observe patterns displayed by the display screen.
In one embodiment, when the plurality of display modules are turned off, the electrochromic film is in a pure state in any one color of black, gray, red, orange, yellow, green, cyan, blue and purple. The electrochromic film is enabled to be displayed in a pure color state of any one color of black, gray, red, orange, yellow, green, cyan, blue and purple under the action of the control circuit, so that the effects of covering up splicing seams and uneven color difference of the spliced display screen can be achieved, a certain color can be presented as required when the spliced display screen is turned off, and the visual perception is improved.
In one embodiment, the electrochromic film comprises a first electrode layer, a color-changing layer and a second electrode layer which are sequentially stacked, the second electrode layer is connected with the display module, the control circuit is electrically connected with the first electrode layer and the second electrode layer, the control circuit outputs a control signal, the control signal drives the first electrode layer and the second electrode layer to form an electric field therebetween, and the electric field drives the color-changing layer to convert the pure color state into the transparent state. The control circuit transmits control signals to the first electrode layer and the second electrode layer of the electrochromic film, so that the electrochromic film can be switched between a pure color state and a transparent state according to the bright screen and the dark screen of the display module.
In one implementation mode, the tiled display screen further includes a driving circuit, the driving circuit is configured to output a driving signal to drive the plurality of display modules to turn on or turn off the screen, the control circuit is electrically connected to the driving circuit, and the control circuit outputs the control signal according to the driving signal. The connection between the display module and the electrochromic film is established by connecting the driving circuit and the control circuit, so that the electrochromic film can be switched into a transparent state or a pure color state according to the state of the display module.
In one embodiment, the control circuit includes a comparator, the comparator is electrically connected to the driving circuit, when the display module turns off, the driving circuit inputs a low level to the comparator, the comparator compares the low level with a power voltage and outputs a high level, and the voltage applied to the electrochromic film by the control circuit is zero; when the display module assembly is on, the drive circuit inputs a high level to the comparator, the comparator compares the high level with the power voltage and then outputs a low level, and the control circuit applies a voltage to the electrochromic film, wherein the voltage is not zero. The comparator is adopted to compare the driving signal of the display module with the power supply voltage and then output the control signal, so that the signal interference can be eliminated, and the control performance of the control circuit can be improved.
In one embodiment, the control circuit further comprises a P-type MOSFET switch electrically connected to the comparator and the electrochromic film, the P-type MOSFET switch adjusting a switching state of the P-type MOSFET switch according to a high level or a low level of the comparator output.
When the comparator outputs a high level, the P-type MOSFET switch is turned off, the voltage applied to the electrochromic film by the control circuit is zero, and the electrochromic film is in a pure color state; when the comparator outputs a low level, the P-type MOSFET switch is turned on, the voltage applied to the electrochromic film by the control circuit is not zero, and the electrochromic film is in a transparent state. Whether voltage is applied to the electrochromic film or not can be controlled according to the driving signal by opening and closing the P-type MOSFET switch, so that the aim of controlling the electrochromic film to be in a pure color state or a transparent state is fulfilled.
In one embodiment, the electrochromic film includes a plurality of electrochromic regions, the electrochromic regions are insulated from each other, the electrochromic regions are arranged in rows and columns, the electrochromic regions are insulated from each other, the electrochromic regions correspond to the display modules one by one, the control signal output by the control circuit includes a plurality of sub-signals, and the sub-signals are respectively transmitted to the electrochromic regions to respectively control each of the electrochromic regions to be in the transparent state or the pure color state. By dividing the electrochromic film into a plurality of electrochromic areas which are insulated from each other, each electrochromic area can be flexibly controlled to be in a pure color state or a transparent state independently from each other, splicing seams can be covered when the spliced display screen is turned off, meanwhile, when a black picture is displayed on the spliced display screen, the electrochromic film area corresponding to the bright screen part can be in a transparent state, the electrochromic film area corresponding to the black display part is displayed in pure black, and the splicing seams of the black picture area are avoided. And the black darkness of the spliced display screen can be increased, so that the contrast of the spliced display screen is improved.
In one embodiment, a plurality of control wires are disposed on the electrochromic film, the control circuit is connected to the plurality of rows or columns of electrochromic regions by the plurality of control wires in a one-to-one correspondence, and each control wire controls the plurality of electrochromic regions in one row or one column to be in the transparent state or the pure color state. The control circuit is connected with the electrochromic film 3 by arranging the plurality of control wires, and the plurality of control wires are correspondingly connected with the plurality of rows or the plurality of columns of electrochromic areas one by one, so that the aim of respectively controlling the electrochromic areas in different rows or different columns is fulfilled, and the electrochromic areas in different rows or different columns are not interfered with each other when being changed from a pure color state to a transparent state.
In one embodiment, the electrochromic film is further provided with a plurality of driving wires, the driving wires connect the driving circuit with the plurality of columns or the plurality of rows of the electrochromic regions in a one-to-one correspondence manner, and orthographic projections of the driving wires and the control wires on the electrochromic film are intersected. The electrochromic film is provided with the driving wires and the control wires, and the positioning function is realized through intersection points of the driving wires and the control wires, so that the aim of accurately controlling an electrochromic area at a specified position to be in a pure color state or a transparent state is fulfilled.
Based on same utility model design, this application still provides a display device, this display device adopts above-mentioned arbitrary embodiment the concatenation display screen. By adopting the spliced display screen in any one of the above embodiments, when the display device is turned off, the electrochromic film is pure, so that the color difference of the splicing seams and the sealing glue of the display screen of the display device can be covered. Meanwhile, when the display device is bright, the control circuit controls the electrochromic film to be changed from a pure color state to a transparent state, so that human eyes can observe patterns displayed by the display device.
Drawings
FIG. 1 is a schematic plane structure diagram of a tiled display screen according to an embodiment;
FIG. 2 is an exploded view of a tiled display panel of an embodiment, wherein the driving and control circuits are not shown;
FIG. 3 is a schematic cross-sectional view of an electrochromic film according to an exemplary embodiment;
FIG. 4 is a schematic circuit diagram of a tiled display screen according to an embodiment;
FIG. 5 is a schematic cross-sectional structure view of another embodiment of an electrochromic film;
fig. 6 is a schematic plan view of a tiled display screen according to another embodiment.
Description of reference numerals:
1-a display module;
2-splicing seams;
3-an electrochromic film; 31-a first electrode layer; 32-a color change layer; 33-a second electrode layer; 34-a substrate base plate; 35-electrochromic regions; 36-intersection point;
4-a control circuit; 41-a comparator; a 42-P type MOSFET switch; 43-a voltage regulation module; 44-control routing;
5-binding glue;
6-a drive circuit; 61-drive routing;
7-insulating material.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
The tiled display is a display system which realizes non-single-screen ultrahigh resolution and ultra-large pictures through hardware and software and has a comprehensive application platform, is generally formed by splicing and combining display modules, is used as a modern video tool and is widely applied to various fields, such as large-scale post and telecommunications communication systems, broadcast television broadcasting, security monitoring, military command, industrial process control, traffic management command, public security command monitoring, various production scheduling, communication network management, energy distribution and transportation and the like. The large-screen splicing display can intensively display signals from various signal sources such as video and networks, so as to meet the requirement of a user for displaying various shared information and comprehensive information in a large area. However, at present, all large-sized tiled display screens are formed by splicing one small lamp panel, so that human eyes can obviously observe the uneven color difference of the splicing seams and the sealing glue on the screens when in close-range observation, and the visual perception is influenced.
Therefore, how to cover up the uneven color difference of the splicing seams and the sealing glue of the spliced display screen and improve the visual perception has important significance for the development of the display technology.
Based on this, the present application intends to provide a solution to the above technical problem, the details of which will be explained in the following embodiments.
Referring to fig. 1, an embodiment of the present application provides a tiled display screen, which includes a plurality of display modules 1, an electrochromic film 3, and a control circuit 4.
A plurality of display module assembly 1 concatenation equipment can realize not unidimensional demonstration function according to the demonstration demand of difference. Due to the process of splicing the display modules and the structural reasons of the display modules, a splicing seam 2 is formed between every two adjacent display modules. The plurality of display modules 1 may be LED (light emitting diode) display modules or LCD (liquid crystal display) display modules. Each display module 1 includes a light-emitting surface, and the light emitted from the light-emitting surface can be used to view the picture displayed on the display module 1.
Referring to fig. 2, the electrochromic film 3 is disposed on the light emitting surface of the plurality of display modules 1 and covers the stitching seams 2, the electrochromic film 3 has a property of changing color when being powered on, so that when the electrochromic film 3 is powered off and displays a pure color, a masking effect on uneven color differences of the stitching seams 2 and the sealing compound of the display modules 1 can be achieved, and when the electrochromic film 3 is powered on, the display module is in a transparent state.
As shown in fig. 1, the control Circuit 4 is electrically connected to the electrochromic film 3 for controlling the electrochromic film 3 to be in a transparent state or a solid state, and the control Circuit 4 may be Printed on an FPC (Flexible Printed Circuit) and connected to the electrochromic film 3 through a HUB to save an installation space.
When a plurality of display module assembly 1 put out the screen, control circuit 4 does not have control signal output, and electrochromic membrane 3 is the pure color state, because electrochromic membrane 3 covers effect to concatenation seam and display module assembly 1, the concatenation display screen that people's eye observed is the same pure color of even pure and electrochromic membrane 3 colour.
When the plurality of display modules 1 are in bright screen, the control circuit 4 outputs a control signal to enable the electrochromic film 3 to be converted from a pure color state to a transparent state, so that the purpose of no shielding when the display screen is in bright screen is achieved, and the image of the display screen can still be observed by human eyes.
The electrochromic film 3 is arranged on the light emitting surface of the spliced display screen, and the control circuit 4 controls the electrochromic film 3 to be switched between a transparent state and a pure color state according to the screen on and off of the spliced display screen, so that when the display module 1 is switched off, the electrochromic film 3 is pure color, and the effects of splicing seams of the spliced display screen and uneven glue color difference of sealing glue are covered; when the display module 1 is bright, the control circuit 4 controls the electrochromic film 3 to be changed from a pure color state to a transparent state, so that human eyes can observe patterns displayed by the display screen.
In one embodiment, referring to fig. 1, when the plurality of display modules 1 are turned off, the electrochromic film 3 is in a pure color state of any one of black, gray, red, orange, yellow, green, cyan, blue and purple, and in other embodiments, the pure color may be any desired display color. The pure color displayed by the electrochromic film 3 is controlled by the control circuit 4, different control signals can be output by the control circuit 4, different control signals represent voltages with different sizes, the voltage size can be preset for the control circuit 4, and the voltages with different sizes are in one-to-one correspondence with the electrochromic film 3 to display different colors. By displaying the electrochromic film 3 in any one of black, gray, red, orange, yellow, green, cyan, blue and purple display states under the action of the control circuit 4, the effect of covering up the splicing seams and uneven color difference of the spliced display screen can be achieved, a certain color can be presented as required when the spliced display screen is turned off, and the visual perception is improved.
In one embodiment, referring to fig. 3, the electrochromic film 3 includes a first electrode layer 31, a color-changing layer 32, and a second electrode layer 33 sequentially stacked, the electrochromic film 3 further includes a substrate 34, the first electrode layer 31 is connected to the substrate 34, the substrate 34 is coated with a chemical substance capable of storing ions, and when the color-changing layer 32 undergoes an oxidation-reduction reaction, the entire electrochromic film 3 can maintain charge balance by storing ions with the chemical substance capable of storing ions. The second electrode layer 33 is connected to the plurality of display modules 1 through a colorless and transparent bonding adhesive 5 with a low curing temperature, such as an oca (optically Clear adhesive) optical adhesive. The color-changing layer 32 is filled with an electrochromic material, the optical property of the electrochromic material can be reversible and stable in color change under the action of an external electric field, and the electrochromic material can be an organic electrochromic material or an inorganic color-changing material. The control circuit 4 is electrically connected to the first electrode layer 31 and the second electrode layer 33, the control circuit 4 outputs a control signal, the control signal drives the first electrode layer 31 and the second electrode layer 33 to form an electric field, and the electric field drives the electrochromic material in the color-changing layer 32 to perform an oxidation-reduction reaction to convert from a pure color state to a transparent state. The control circuit 4 transmits control signals to the first electrode layer 31 and the second electrode layer 33 of the electrochromic film 3, so that the electrochromic film 3 is switched between a pure color state and a transparent state according to the bright screen and the off screen of the display module 1.
In one embodiment, referring to fig. 1, the tiled display screen further includes a driving circuit 6, the driving circuit 6 is configured to output a driving signal to drive the plurality of display modules 1 to turn on or off the screen, the control circuit 4 is electrically connected to the driving circuit 6, and the control circuit 4 outputs a control signal according to the driving signal. Specifically, when the display module 1 is in the off-screen state, the driving circuit 6 outputs a low-level driving signal to the control circuit 4, the voltage applied by the control circuit 4 to the electrochromic film 3 according to the received low-level driving signal is zero, and the electrochromic film 3 displays a pure color; when the display module 1 is on, the driving circuit 6 outputs a high-level driving signal to the control circuit 4, the control circuit 4 applies a voltage to the electrochromic film 3 according to the received high-level signal, the voltage is not zero, and the electrochromic film 3 is changed from a pure color state to a transparent state. Similarly, when the display module 1 is turned off from the bright screen, since the color transition of the electrochromic film 3 is reversible, at this time, the signal output by the driving circuit 6 to the control circuit 4 is changed from the high level to the low level, and the control circuit 4 controls the electrochromic film 3 to be changed from the transparent state to the pure color state. The connection between the display module 1 and the electrochromic film 3 is established by connecting the driving circuit 6 and the control circuit 4, so that the electrochromic film 3 is switched to a transparent state or a pure color state according to the state of the display module 1.
In one embodiment, referring to fig. 4, the control circuit 4 includes a comparator 41, the comparator 41 is electrically connected to the driving circuit 6, when the display module 1 turns off, the driving circuit 6 inputs a low level to the comparator 41, the comparator 41 compares the received low level with a power voltage and outputs a high level, the voltage applied by the control circuit 4 to the electrochromic film 3 is zero, and the electrochromic film 3 is in a pure color state. Alternatively, when the display module 1 turns off the screen, the driving circuit 6 inputs a low level to the comparator 41, the comparator 41 compares the received low level with the power voltage and outputs a high level, and the control circuit 4 applies a preset voltage value to the electrochromic film 3, so that the electrochromic film 3 is in a pure color state with a preset color. When the display module 1 is on, the driving circuit 6 inputs a high level to the comparator 41, the comparator 41 compares the received high level with the power voltage and outputs a low level to turn on the control circuit 4, the voltage applied to the electrochromic film 3 by the control circuit 4 is not zero, and the electrochromic film 3 is changed from a pure color state to a transparent state. The comparator 41 is used for comparing the driving signal input by the driving circuit 6 with the power supply voltage and then outputting the control signal, so that the display state of the electrochromic film 3 can be changed according to the display state of the display module 1, the signal interference can be eliminated, and the control performance of the control circuit 4 can be improved.
In one embodiment, referring to fig. 4, the control circuit 4 further includes a P-type MOSFET switch 42, the P-type MOSFET switch 42 is electrically connected to both the comparator 41 and the electrochromic film 3, the P-type MOSFET switch adjusts its switching state according to the high level or the low level output by the comparator 41, and outputs different control signals to the electrochromic film 3 according to the switching state of the P-type MOSFET switch.
Optionally, the control circuit 4 further includes a voltage regulating module 43, and the voltage regulating module 43 may be a voltage boosting circuit, a voltage reducing circuit or an inverting circuit to convert the voltage output by the P-type MOSFET switch 42 into the voltage required by the electrochromic film 3. When the comparator 41 outputs a high level, the P-type MOSFET switch 42 is turned off, and the control circuit 4 has no output, so that the voltage applied to the electrochromic film 3 by the control circuit 4 is zero, and the electrochromic film 3 is in a pure color state; when the comparator outputs a low level, the P-type MOSFET switch 42 is turned on, the drain voltage of the P-type MOSFET switch 42 is transmitted to the voltage regulating module, and a non-zero high voltage or low voltage required by the electrochromic film 3 for color change is output, so that the film layer is changed into a colorless and transparent state, and a human eye sees a normal display image of the tiled display screen. Whether to apply a voltage to the electrochromic film 3 may be controlled according to the driving signal by turning on and off the P-type MOSFET switch 42, thereby achieving the purpose of controlling the electrochromic film 3 to be in a pure color state or a transparent state.
In one embodiment, referring to fig. 5 and 6, the electrochromic film 3 includes a plurality of electrochromic regions 35, the electrochromic regions 35 are arranged in rows and columns, an insulating material 7 is disposed between the electrochromic regions 35 to insulate the electrochromic regions, the electrochromic regions 35 correspond to the display modules 1 one by one, the control signal output by the control circuit 4 includes a plurality of sub-signals, and the sub-signals are respectively transmitted with the electrochromic regions 35 in a one-to-one correspondence manner to respectively control each electrochromic region 35 to be in a transparent state or a pure color state. By dividing the electrochromic film 3 into a plurality of electrochromic regions 35 which are insulated from each other, each electrochromic region 35 can be flexibly controlled to be in a pure color state or a transparent state independently from each other, the splicing seam 2 can be covered when the spliced display screen is off, meanwhile, when a black picture is displayed on the spliced display screen, the electrochromic film region 35 corresponding to the bright screen part can be in a transparent state, the electrochromic film region 35 corresponding to the black display part is displayed in a pure color, and the splicing seam of the black picture region is avoided. And the black darkness of the spliced display screen can be increased, so that the contrast of the spliced display screen is improved.
In one embodiment, referring to fig. 6, a plurality of control traces 44 are disposed on the electrochromic film 3, the plurality of control traces 44 connect the control circuit 4 with the plurality of rows or columns of electrochromic regions 35 in a one-to-one correspondence, and each control trace controls the plurality of electrochromic regions 35 in one row or column to be in a transparent state or a pure color state. The control circuit 44 is connected with the electrochromic film 3 by arranging the plurality of control wires 44, and the plurality of control wires 44 are correspondingly connected with the plurality of rows or columns of electrochromic regions 35 one by one, so that the purpose of respectively controlling the electrochromic regions 35 in different rows or different columns is achieved, and the electrochromic regions in different rows or different columns are not interfered with each other when being changed from a pure color state to a transparent state.
In one embodiment, referring to fig. 6, a plurality of driving traces 61 are further disposed on the electrochromic film 3, and the driving traces 61 connect the driving circuit 6 with the plurality of columns or rows of electrochromic regions 35 in a one-to-one correspondence. Specifically, when the plurality of control traces 44 are correspondingly connected to the plurality of rows of electrochromic regions 35, the plurality of driving traces 61 are correspondingly connected to the plurality of columns of electrochromic regions 35. When the plurality of control traces 44 are correspondingly connected to the plurality of rows of electrochromic areas 35, the plurality of drive traces 61 are correspondingly connected to the plurality of rows of electrochromic areas 35. The orthographic projections of the driving wires 61 and the control wires 43 on the electrochromic film intersect to form a plurality of intersection points 36, and each intersection point 36 falls in one electrochromic region 35, so as to realize the control of different electrochromic regions 35. The electrochromic region 35 at the designated position is accurately controlled to be in a pure color state or a transparent state by arranging the driving wire 61 and the control wire 44 on the electrochromic film 3 and realizing the positioning function through the intersection point 36 of the driving wire 61 and the control wire 44.
Based on same utility model design, please refer to fig. 1, this application still provides a display device, and this display device adopts the concatenation display screen of an arbitrary kind of above-mentioned embodiment, for example field such as stage performance curtain, electronic advertising screen, security personnel monitor display screen, military command display screen and production scheduling, energy distribution are with command display screen etc.. By adopting the spliced display screen of any one of the above embodiments, when the display device is turned off, the electrochromic film 3 is pure color, so that the effects of uneven color difference of splicing seams and sealing glue of the display screen of the display device are covered. Meanwhile, when the display device is bright, the control circuit 4 controls the electrochromic film 3 to be changed from the pure color state to the transparent state, so that the human eye observes the pattern displayed by the display device.
It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. A tiled display screen, comprising:
the display module groups are spliced and assembled, and a splicing seam is formed between every two adjacent display module groups;
the electrochromic film is arranged on the light emitting surfaces of the display modules and covers the splicing seams; and the number of the first and second groups,
the control circuit is electrically connected with the electrochromic film and is used for controlling the electrochromic film to be in a transparent state or a pure color state;
when the display modules are in bright screen, the electrochromic film is in the transparent state; when the display modules are turned off, the electrochromic film is in the pure color state.
2. The tiled display screen of claim 1, wherein when a plurality of the display modules are turned off, the electrochromic film is in a pure state of any one of black, gray, red, orange, yellow, green, cyan, blue, and violet.
3. The spliced display screen according to claim 1, wherein the electrochromic film comprises a first electrode layer, a color-changing layer and a second electrode layer which are sequentially stacked, the second electrode layer is connected with a plurality of display modules, the control circuit is electrically connected with the first electrode layer and the second electrode layer, the control circuit outputs a control signal, the control signal drives an electric field to be formed between the first electrode layer and the second electrode layer, and the electric field drives the color-changing layer to be switched from the pure color state to the transparent state.
4. The tiled display screen of claim 3, further comprising a driving circuit, wherein the driving circuit is configured to output a driving signal to drive the plurality of display modules to turn on or off the screen, and the control circuit is electrically connected to the driving circuit and outputs the control signal according to the driving signal.
5. The tiled display screen of claim 4, wherein the control circuit comprises a comparator, the comparator is electrically connected to the driving circuit, when the display module turns off, the driving circuit inputs a low level to the comparator, the comparator compares the low level with a power voltage and outputs a high level, and the voltage applied to the electrochromic film by the control circuit is zero; when the display module assembly is on, the drive circuit inputs a high level to the comparator, the comparator compares the high level with the power voltage and then outputs a low level, and the control circuit applies a voltage to the electrochromic film, wherein the voltage is not zero.
6. The tiled display screen of claim 5 wherein the control circuit further comprises a P-type MOSFET switch electrically connected to the comparator and the electrochromic film, the P-type MOSFET switch adjusting the switching state of the P-type MOSFET switch based on a high or low level of the comparator output;
when the comparator outputs a high level, the P-type MOSFET switch is turned off, the voltage applied to the electrochromic film by the control circuit is zero, and the electrochromic film is in a pure color state; when the comparator outputs a low level, the P-type MOSFET switch is turned on, the voltage applied to the electrochromic film by the control circuit is not zero, and the electrochromic film is in a transparent state.
7. The tiled display screen of claim 4, wherein the electrochromic film comprises a plurality of electrochromic regions, the plurality of electrochromic regions are arranged in rows and columns, the plurality of electrochromic regions are insulated from each other, the plurality of electrochromic regions correspond to the plurality of display modules one-to-one, and the control signal output by the control circuit comprises a plurality of sub-signals respectively transmitted to the plurality of electrochromic regions to control each of the electrochromic regions to be in the transparent state or the solid state.
8. The tiled display screen of claim 7 wherein a plurality of control traces are disposed on the electrochromic film, the plurality of control traces connect the control circuit with the plurality of rows or columns of the electrochromic regions in a one-to-one correspondence, each of the control traces controls the plurality of electrochromic regions in one row or column to be in the transparent state or the solid state.
9. The tiled display screen of claim 8 wherein a plurality of drive traces are disposed on the electrochromic film, the plurality of drive traces connecting the drive circuitry with the one or more columns of the electrochromic regions in a one-to-one correspondence, the drive traces intersecting with an orthographic projection of the control traces on the electrochromic film.
10. A display device comprising a tiled display screen according to any of claims 1 to 9.
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| CN202021934842.1U CN212675330U (en) | 2020-09-07 | 2020-09-07 | Spliced display screen and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114694518A (en) * | 2022-04-20 | 2022-07-01 | 武汉华星光电半导体显示技术有限公司 | Spliced display screen |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114694518A (en) * | 2022-04-20 | 2022-07-01 | 武汉华星光电半导体显示技术有限公司 | Spliced display screen |
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Address after: 402760 No.69, Wushan Road, Biquan street, Bishan District, Chongqing Patentee after: Chongqing Kangjia Optoelectronic Technology Co.,Ltd. Country or region after: China Address before: 402760 No.69, Wushan Road, Biquan street, Bishan District, Chongqing Patentee before: Chongqing Kangjia Photoelectric Technology Research Institute Co.,Ltd. Country or region before: China |