CN202443212U

CN202443212U - LCD (Liquid Crystal Display) backlight communication system based on LED (Light Emitting Diode)

Info

Publication number: CN202443212U
Application number: CN2012200639609U
Authority: CN
Inventors: 郭丰亮
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-02-27
Filing date: 2012-02-27
Publication date: 2012-09-19
Anticipated expiration: 2022-02-27

Abstract

The utility model discloses an LCD (Liquid Crystal Display) backlight communication system based on an LED (Light Emitting Diode). The LCD backlight communication system comprises a front cover, an LCD screen, a backlight source and a back cover, wherein the LCD screen is arranged at the back of the front cover, the LCD screen comprises two substrates engraved with transparent conductive electrodes, and a colorful optical filter, a liquid crystal molecule and a thin film transistor which are located between the two substrate, the backlight source is an LED two-dimensional array formed by LED luminous elements, an LCD backlight flat panel display further comprises a photoelectric converter and a demodulator circuit, a light signal transmitted by the LED backlight source is changed to an electric signal through photovoltaic conversion, and then the information is displayed by the LCD screen through the demodulator circuit. Through abovementioned ways, the LCD backlight communication system, provided by the utility model, can avoid the problem of uneven backlight distribution, the LED is taken as a backlight unit, so that the LCD backlight communication system is healthy, environmental-friendly and small in power consumption, but above all the visual light communication can be carried out by utilizing the LED.

Description

LED-based LCD communication system backlight

Technical field

The utility model relates to the plate of flat liquid crystal display field, particularly relates to a kind of LED-based LCD communication system backlight.

Background technology

Flat-panel monitor generally is divided into luminescence type display or non-light emitting type display.Luminescence type display comprises cathode ray tube (CRT), plasma panel (PDP) etc.; Non-light emitting type display can not active illuminating.LCD (LCD) is the typical example of non-light emitting type display.

Non-light emitting-type flat-panel monitor can come display image through accepting light from the outside.Because this characteristic, except display panel, non-light emitting-type flat-panel monitor also need be given the display panel backlight unit radiating light.

According to the installation site of its light source, back light unit is divided into direct light type and edge light type, and in direct light type back light unit, light source is arranged on the display panel rear side, thus directly to display panel emission light; The light source of frontier juncture type is arranged on the transverse edge place of LGP, thereby launches light through LGP to display panel.Be used for the light source package vinculum property light source and the pointolite of back light unit, cold cathode fluorescent tube (CCFL) is typical linear light sorurce.

Common LCD display uses cold cathode fluorescent tube (CCFL) as backlight, and the principle of luminosity of CCFL is similar to common daylight lamp, and the glass inwall is coated with has expired fluorescent material, and encloses the potpourri of neon, argon gas and micro-mercury.CCFL is through the electrode of lamp tube ends, thereby the fluorescent material generating on the tube wall is collided in the ultraviolet ray that the mercury vapour in the fluorescent tube is excited.

But, because common elongated or " U " font of CCFL fluorescent tube, therefore, skewness backlight; In addition, the mercury gas in the pipe contains mercury element, and this is a kind of poisonous heavy metal, is unfavorable for health and environmental protection; In addition, CCFL must comprise complicated optical device such as diffuser plate, reflecting plate, makes the volume of display further to dwindle, and along with the increase of screen size, power consumption also is doubled and redoubled; CCFL another one shortcoming be very easy to be damaged in the change procedure of light on and off and the light on and off transition activities too slow, thereby do not possess communication function.

The utility model content

The technical matters that the utility model mainly solves provides a kind of LED-based LCD communication system backlight; Can avoid problem pockety backlight; And use LED as back light unit, health, environmental protection, power consumption are little, the most important thing is to utilize LED to carry out visible light communication.

For solving the problems of the technologies described above; The technical scheme that the utility model adopts is: a kind of LED-based LCD is provided communication system backlight; Comprise: protecgulum, LCD screen, backlight and bonnet; Said LCD screen is arranged on after the said protecgulum; Said LCD screen comprises: two photoetching have the substrate of transparency conductive electrode and are in colored filter, liquid crystal molecule and the thin film transistor (TFT) between said two plate bases, the LED two-dimensional array that said backlight constitutes for the LED light-emitting component, and said LCD flat-panel monitor backlight also comprises: photoelectric commutator and demodulator circuit; The light signal that send in said LED-backlit source becomes electric signal through opto-electronic conversion, information is shown by the LCD screen through said demodulator circuit again.

In preferred embodiment of the utility model, said two photoetching have the substrate of transparency conductive electrode all around with the epoxy glue sealing, on the substrate one side seal edge fit after the said encapsulation liquid crystal injecting port are set.

In preferred embodiment of the utility model, said backlight is the direct light type, is arranged on the rear side of LCD screen.

The beneficial effect of the utility model is: the LED-based LCD of the utility model communication system backlight can realize visible light communication; Can avoid the electromagnetic wave of general WLAN or high frequency wireless transmission; Human body and peripheral electronic equipment are caused the influence of interference; And the instead radio base station, possess safe characteristics simultaneously.

Description of drawings

Fig. 1 is that the LED-based LCD of the utility model communication system backlight is unified the structural representation of preferred embodiment;

Embodiment

Below in conjunction with accompanying drawing the preferred embodiment of the utility model is set forth in detail, thereby the protection domain of the utility model is made more explicit defining so that advantage of the utility model and characteristic can be easier to it will be appreciated by those skilled in the art that.

See also Fig. 1; The utility model embodiment comprises: protecgulum, LCD screen, backlight, photoelectric commutator, demodulator circuit and bonnet; The LCD screen is arranged on after the protecgulum; Backlight is the LED two-dimensional array that the LED light-emitting component constitutes, LED have backlightly be evenly distributed, health, environmental protection, power consumption is little, can carry out visible light communication.Backlight is the direct light type, can directly send the light of multiple color such as red, green, blue, thereby forms colour picture, is arranged on the rear side of LCD screen.The light signal that send in the LED-backlit source becomes electric signal through opto-electronic conversion, information is shown by the LCD screen through demodulator circuit again, realizes the LED visible light communication.

The LCD screen comprises: two photoetching have the substrate of transparency conductive electrode and are in colored filter, liquid crystal molecule and the thin film transistor (TFT) between two plate bases; Two photoetching have the substrate of transparency conductive electrode to seal with epoxy glue all around; On the substrate one side seal edge fit after the encapsulation liquid crystal injecting port is set; Liquid crystal material is to inject under vacuum condition through this inlet, and is after the injection, with resin that the opening shutoff is good.Shaft-like liquid crystal molecule comes deflection angle and direction according to current's intensity, thereby makes light produce polarization and refraction, to demonstrate various colors.

Be different from prior art, the backlight of the LED-based LCD of the utility model communication system backlight adopts the LED two-dimensional array, and LCD flat-panel monitor backlight also comprises: photoelectric commutator and demodulator circuit, can realize visible light communication.

The utility model course of work is: LED two-dimensional array backlight converts light signal to after receiving the electric signal after modulation; Transmit through the LED light beam; Convert the light signal that receives to electric signal through photoelectric commutator, after the demodulator circuit demodulation, show by the LCD screen.

The above is merely the embodiment of the utility model; Be not thus the restriction the utility model claim; Every equivalent structure or equivalent flow process conversion that utilizes the utility model instructions and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the utility model.

Claims

1. LED-based LCD communication system backlight; Comprise: protecgulum, LCD screen, backlight and bonnet; Said LCD screen is arranged on after the said protecgulum, and said LCD screen comprises: two photoetching have the substrate of transparency conductive electrode and are in colored filter, liquid crystal molecule and the thin film transistor (TFT) between said two plate bases, it is characterized in that; The LED two-dimensional array that said backlight constitutes for the LED light-emitting component; Said LCD flat-panel monitor backlight also comprises: photoelectric commutator and demodulator circuit, the light signal that send in said LED-backlit source becomes electric signal through opto-electronic conversion, information is shown by the LCD screen through said demodulator circuit again.

2. LED-based LCD according to claim 1 communication system backlight is characterized in that, said two photoetching have the substrate of transparency conductive electrode all around with the epoxy glue sealing, on the substrate one side seal edge fit after the said encapsulation liquid crystal injecting port are set.

3. LED-based LCD according to claim 1 communication system backlight is characterized in that said backlight is the direct light type, is arranged on the rear side of LCD screen.