CN109801568A

CN109801568A - LED cascade type transparent display screen

Info

Publication number: CN109801568A
Application number: CN201910233916.4A
Authority: CN
Inventors: 熊木地; 范婷; 谢亮天; 刘盼; 刘磊传; 孙宇航; 郭俞君
Original assignee: Dalian Jisite Technology Co ltd
Current assignee: Dalian Jisite Technology Co ltd
Priority date: 2019-03-26
Filing date: 2019-03-26
Publication date: 2019-05-24

Abstract

The invention discloses an LED cascade type transparent display screen which comprises a transparent substrate, wherein the surface of the transparent substrate is fixedly connected with a complete addressable pixel point array, and two adjacent pixel points are connected through a transparent wire. One transparent signal conductor wire can be connected with a plurality of columns of pixel points in series, each column (or less columns) of pixel points are provided with an independent power supply and a grounding, and the display screen is provided with three transparent wires to finish video data transmission. The LED transparent display screen full-color video display system has the advantages that the LED transparent display screen full-color video display is realized, the wiring quantity is greatly reduced, the problem of complicated wiring between display screen lattices is effectively solved, the good transparency of the display screen is guaranteed, the occupied space of an off-screen driving system is effectively saved, the display screen is easier to install and maintain, and the display screen full-color video display system has the advantages of high display resolution and stable video data.

Description

A kind of LED tandem type transparent display screen

Technical field

The present invention relates to field of display screen more particularly to a kind of LED tandem type transparent display screens.

Background technique

Display technology reaches its maturity at present, and every field in social life is widely used.LED display is The plane formula of lattice module or the pixel unit composition constituted using light emitting diode shows screen.Traditional LED display is by shielding The LED dot matrix of the driving circuit driving display screen of outer placement, limits the space that display screen is put and moved, and volume is greatly and not It is easy to install.And each pixel includes tri- LED of R, G, B on traditional LED display, therefore the quarter on display screen between pixel Data line, clock line, power supply line, the ground wire etc. that cabling includes three LED are lost, the various complexity of cabling is not convenient for safeguarding.

Summary of the invention

According to problem of the existing technology, the invention discloses a kind of LED tandem type transparent display screens, including transparent base Plate, the surface of the transparent substrate are fixedly connected with complete addressable pixel lattice array, and two neighboring pixel is led by transparent Line is connected.

Further, a transparent signal conductor wire can connect multiple row pixel, and each column (or less column) pixel has solely Vertical power supply and ground connection, totally three transparent cablings complete video data transmission to display screen.

The transparent conductors can cascade unlimited pixel, the transparent display screen of forming array distribution with serpentine fashion.

Addressable pixel point includes at least control chip and LED luminescence chip, completes inside each pixel presently described The driving of LED luminescence chip and the treatment process of display screen video data.

The control chip includes at least oscillator module, power supply stabilization circuit module, constant-current circuit module, shift LD Device module, Shaping Module, data latch module, drive module；

The oscillator module provides local clock pulses for pixel；

The power supply stabilization circuit module is to provide stabilized power supply inside pixel；

The constant-current circuit module guarantees control chip steady operation, and control LED luminescence chip light color is consistent；

Serial data is successively pressed waterfall sequence displacement by the shift register module under the action of local clock pulses Processing；

The serial video data for flowing through pixel is carried out Shape correction by the Shaping Module, prevents line waveform distortion tired Add；

The data latch module latches the corresponding RGB data of current LED luminescence chip；

The drive module driving LED luminescence chip shines.

Further, there are four port, respectively data signal input mouth DIN, data letter for each pixel tool Number output port DOUT, supply port VCC and ground port GND, if the resolution ratio of display screen is that then the display screen works shape n × m State are as follows:

After the pixel electrification reset, it is defeated to shield the outer data that serial video data to display screen n-th × m pixel are provided Inbound port DIN, by serial data stream again shaping and step-by-step is successively with the snakelike cascade sequence of pixel inside the pixel Rearward displacement transmitting, and next input port DIN for cascading pixel is sent to through data signal output mouth DOUT.According to Aforesaid way is by serial video data shift transport, until controlling described in each pixel after the first pixel receives data Chip step-by-step latches corresponding RGB data and judges a frame image after n-th × m pixel has latched the last one serial data The data transfer ends, all pixels point is shone by its corresponding described drive module driving LED luminescence chip at this time, makes all pictures Vegetarian refreshments is lighted simultaneously, then latch module Refresh Data.

Further the control chip drives LED chip uses PWM technology.It is modulated by PWM gray modulation function defeated Gradation data out, is then transmit to LED chip, controls the light emission luminance of LED, realizes 4096 gray level full-color EL displays.Have Effect ensure that the high consistency of the color of light in pixel.

Further, data transmission using single polarity zero yards corrects local as communication protocol between the pixel Clock

By adopting the above-described technical solution, a kind of LED tandem type transparent display screen provided by the invention, with the prior art It compares, the present invention makes the screen upward wiring of display screen become simpler, only three transparent cablings is needed to can be achieved with video image number According to transmission and decoding, efficiently solve the problems, such as that cabling is cumbersome between display screen dot array, and it is good to maintain display screen The transparency.Simultaneously because each pixel is integrated with control chip and LED luminescence chip, it is effectively saved the outer driving system of screen System occupied space, keeps display screen more easy to install and safeguards.And by the way that numerous pixel can be cascaded with serpentine fashion, make display screen Have the advantages that display resolution is high, video data is stable.

Detailed description of the invention

In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this The some embodiments recorded in application, for those of ordinary skill in the art, without creative efforts, It is also possible to obtain other drawings based on these drawings.

Fig. 1 is LED tandem type transparent display screen schematic diagram of the present invention；

Fig. 2 is each pixel structure chart of the present invention；

Fig. 3 is present invention control chip functions module map；

Fig. 4 circuit connecting mode schematic diagram between present invention pixel point；

Fig. 5 data between present invention pixel point transmit schematic diagram.

Specific embodiment

To keep technical solution of the present invention and advantage clearer, with reference to the attached drawing in the embodiment of the present invention, to this Technical solution in inventive embodiments carries out clear and complete description:

A kind of LED tandem type transparent display screen as shown in Figure 1 includes: transparent substrate 101, the transparent substrate 101 Surface is fixedly connected with complete addressable 102 array of pixel, and two neighboring pixel 102 is connected by transparent conductors 103 It connects.

Further, an electrically conducting transparent line 103 can connect multiple row pixel, and each column (or less column) pixel has independence Power supply 104 and ground terminal 105, totally three transparent cablings complete video data transmission to display screen.Further transparent conductors 103 with Serpentine fashion can cascade unlimited pixel 102, forming array distribution and resolution ratio as the transparent display screen of n × m.

It is illustrated in figure 2 each pixel structure chart.Data, LED chip 107 are handled including control chip 106, wherein LED chip 107 includes red LED 108, green LED 109, blue led 110, forms a complete addressable pixel point, The driving of current LED chip and the processing of data are completed inside each pixel, and 4096 grades of gray scale full colors may be implemented Display.

It is illustrated in figure 3 control chip functions figure.Control chip functions include signal shaping module 111 by the number of pixel Prevent that line waveform distortion is cumulative, shift register module 112 makes serial data under the action of clock signal according to shaping is carried out The RGB data of current pixel point successively is latched by waterfall sequence displacement, data latch module 113, drive module 114 drives LED Chip light emitting, reseting module 115 guarantee control chip steady operation for electrification reset, constant-current circuit module 116 and guarantee picture Vegetarian refreshments light color consistency, power supply stabilization circuit module 117 provide stabilized power supply, oscillator module 118 provides for pixel Local clock.

It is illustrated in figure 4 circuit connecting mode schematic diagram between pixel 102.Each 102 chip of pixel is managed for four totally Foot, including data signal input mouth DIN, data signal output mouth DOUT, supply port VCC, port GND.

As data transmit schematic diagram to Fig. 5 between pixel.If the resolution ratio of display screen is n × m, shield the serial view of outer offer Frequency is according to the data-in port DIN to display screen n-th × m pixel, inside the pixel 102 again by serial data stream Simultaneously step-by-step is successively transmitted with the snakelike cascade sequence rearward displacement of pixel for shaping, and is transmitted through data signal output mouth DOUT To the input port DIN of next cascade pixel.In the manner described above by serial video data shift transport, until the first picture After vegetarian refreshments receives data, the corresponding 24bit (each primary colours 8bit of RGB) of control chip step-by-step latch described in each pixel, The RGB data of 30bit (each primary colours 10bit of RGB) or 36bit (each primary colours 12bit of RGB) are locked in n-th × m pixel After having deposited the last one serial data, a frame image data end of transmission is judged, all pixels point is corresponding described by its at this time Drive module drives LED luminescence chip to shine, and makes all pixels point while lighting, then latch module Refresh Data.

Further, the transparent display screen pixel 102 and host computer video pictures mapping relations are display screen first Pixel corresponds to the first row the first row pixel that resolution ratio is n × m host computer video pictures, and the second pixel has corresponded to video Picture first row the second row pixel, n-th × m pixel correspond to video pictures n-th and arrange m row pixel.

Compared with prior art, the present invention makes circuit on LED tandem type transparent display screen become simpler, only needs one Transparent signal conductor wire can be achieved with the transmission and decoding of data, efficiently solve that cabling between display screen dot array is cumbersome to ask Topic, maintains the good transparency of display screen.Since pixel is integrated with control chip 106 and LED chip 107, effectively Ground saves the outer drive system occupied space of screen, keeps display screen more easy to install and safeguards, while having display resolution height, video The advantages of data stabilization.

Further, control 106 output driving module 114 of chip driving LED chip uses PWM technology.Pass through PWM gray scale The gradation data of modulation function modulation output, is then transmit to LED chip 107, controls the light emission luminance of LED, realizes 4096 ashes Spend grade full-color EL display.

Further data transmission uses single polarity zero yards as communication protocol between pixel 102.When hair " 1 " code When, positive current is issued, but the duration is shorter than the time width of a symbol；Electric current is not sent when sending out " 0 " code.In receiving end Carry out revised version using the current signal rising edge received as trigger signal according to the local clock that oscillator module 118 generates Ground clock.

The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto, Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.

Claims

1. An LED cascaded transparent display screen, characterized in that it comprises: a transparent substrate (101), the surface of which is fixedly connected to a complete addressable pixel point (102) array, and two adjacent pixel points (102) are fixedly connected to the surface of the transparent substrate (101). The pixel points (102) are connected by transparent wires (103).

2. The LED cascaded transparent display screen according to claim 1, characterized in that: a transparent conductive line (103) is connected in series with multiple columns of pixel points (102), and each column of pixel points (102) has independent power supply and grounding end. The LED cascaded transparent display screen according to claim 1, further characterized in that: the transparent wires (103) are cascaded in a serpentine manner with infinite pixel points (102) to form an array-distributed transparent display screen.

3. The LED cascaded transparent display screen according to claim 1, wherein the pixel point (102) at least comprises a control chip and an LED light-emitting chip, and each pixel point (102) internally completes the currently described The driving of the LED light-emitting chip and the processing of the video data of the display screen;

The control chip at least includes an oscillator module, a power supply voltage regulator circuit module, a constant current circuit module, a shift register module, a shaping module, a data latch module and a drive module; the oscillator module provides a local clock signal for the pixel; The power supply voltage regulator circuit module provides stable power supply for the interior of the pixel; the constant current circuit module adjusts the control chip in real time to ensure stable operation, and also controls the LED light-emitting chip to have the same light color; the shift register module is located locally Under the action of the clock signal, the serial data is sequentially shifted and processed in cascade order; the shaping module performs shaping processing on the serial video data flowing through the pixel points to prevent line waveform distortion and accumulation; the data latch module latches RGB data corresponding to the current LED light-emitting chip; the driving module drives the LED light-emitting chip to emit light.

4. A kind of LED cascade type transparent display screen according to claim 3, it is characterized in that: described each pixel point (102) has four ports, respectively is input port DIN, data signal output port DOUT, The power supply port VCC and the ground port GND, if the resolution of the display screen is n×m, the working status of the display screen is:

After the pixel point (102) is powered on and reset, the serial video data is transmitted to the input port DIN of the n×mth pixel point of the display screen, and the serial data stream is reshaped inside the pixel point and sequentially displayed in bits. The sequence of the pixel point serpentine cascade is shifted backward, and is transmitted to the input port DIN of the next cascaded pixel point through the data signal output port DOUT, and the serial video data is shifted and transmitted according to the above method until the first pixel. After receiving the data, the control chip of each pixel latches the corresponding RGB data bit by bit. After the last serial data is latched at the n×m pixel, it is judged that the transmission of one frame of image data is over. The pixel point is driven by its corresponding driving module to drive the LED light-emitting chip to emit light, so that all the pixel points are lit at the same time, and then the data of the latch module is refreshed.