CN202159470U

CN202159470U - Test system for white balance brightness of LED display screen

Info

Publication number: CN202159470U
Application number: CN2011200542435U
Authority: CN
Inventors: 朱凌; 张奇; 王启权; 吴涵渠
Original assignee: Shenzhen Aoto Electronics Co Ltd
Current assignee: Shenzhen Aoto Electronics Co Ltd
Priority date: 2011-03-03
Filing date: 2011-03-03
Publication date: 2012-03-07
Anticipated expiration: 2021-03-03

Abstract

The utility model is suitable for the field of an LED display screen and provides a test system for the white balance brightness of an LED display screen. The test system comprises a host machine, a PCB, an LED display module group, and an LED display module group parameter gatherer. The host machine is connected with the PCB via a communication serial port wire. The PCB is connected with the LED display module group via a lead. The LED display module group parameter gatherer is used for receiving illumination emitted by the LED display module group. The host machine is connected with the LED display module group parameter gatherer via a communication serial port wire. According to the embodiment of the utility model, white balance brightness parameters are set in advance, and coordinates of R, G and B light are obtained through setting of the resistance value of an REXT resistor and gathering of light emitted by the LED display module group; and then the brightness of the R, G and B light is calculated by the host machine based on the coordinates, thereby obtaining resistance needed by the R, G and B light when targeted white balance brightness is reached.

Description

The test macro of a kind of LED display white balance brightness

Technical field

The utility model belongs to the LED display field, relates in particular to a kind of system that tests the brightness of LED display white balance.

Background technology

Digital regulation resistance: also claim digital potentiometer, a kind of device that changes with its resistance of Digital Signals.

High speed development along with LED display; LED display has obtained application more and more widely; White balance is as a major criterion judging the LED display quality, and LED display is made up of many cell module in the prior art, and the cell module wwhite balance control circuit generally comprises following a few part: LED lamp, constant-current driving IC, REXT resistance and RGB three coloured light potentiometers; At first confirm REXT resistance; Through the resistance value of manual adjustment RGB three coloured light potentiometers, reach adjustment LED electric current again, and then change the effect of LED luminous intensity.

Yet the common precision of manual adjustments resistance value is not high, and needs long time.

The utility model content

The purpose of the utility model embodiment is to provide the test macro of a kind of LED display white balance brightness, is intended to solve the not enough problem of resistance value precision of prior art manual adjustment RGB three coloured light potentiometers.

The utility model embodiment is achieved in that the test macro of a kind of LED display white balance brightness, comprising:

Host computer, pcb board, LED show that module, LED show module parameter acquisition device;

Said host computer is connected with said pcb board through the communication Serial Port Line;

Said pcb board shows that with said LED module is connected through lead;

Said LED shows that module parameter acquisition device receives the illumination that said LED shows that module sends;

Said host computer shows that with said LED module parameter acquisition device is connected through the communication Serial Port Line.

Further, said pcb board also comprises: target white balance parameter receiver, the REXT resistance that is connected with target white balance parameter receiver are provided with device, with REXT resistance the digital regulation resistance that device is connected are set.

In the utility model embodiment,, set the resistance of REXT resistance respectively through pcb board to the white balance luminance parameter that the host computer input is provided with in advance; LED shows that module parameter acquisition device is through gathering the light that LED shows that module sends; Obtain the coordinate of R, G, B three coloured light and said coordinate is sent to host computer through the communication Serial Port Line, host computer is according to the brightness of said coordinate Calculation RGB three coloured light, and then R when obtaining to reach the brightness of target white balance; G, the resistance that B three coloured light are required.

Description of drawings

Fig. 1 is the structural drawing of the light-emitting diode display white balance test macro that provides of the utility model embodiment;

Fig. 2 is the test macro concrete structure figure that the utility model embodiment provides;

Fig. 3 is the structural drawing of another embodiment of the utility model;

Fig. 4 is the structural drawing of the another embodiment of the utility model.

Embodiment

For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

Be illustrated in figure 1 as the structural drawing of the light-emitting diode display white balance test macro that the utility model embodiment provides,, the part relevant with the utility model embodiment only be shown for the ease of explanation, wherein:

Said light-emitting diode display white balance test macro comprises host computer 11, pcb board 12, and LED shows module 13, LED shows module parameter acquisition device 14.Wherein host computer 11 is connected with pcb board 12 through the communication Serial Port Line, and pcb board 12 shows that with LED module 13 is connected through lead, and LED shows that module parameter acquisition device 14 is connected with host computer 11 through the communication Serial Port Line.

Wherein host computer 11 comprises: three coloured light brightness calculator 114, three coloured light resistance detectors 115 and thermal equilibrium detecting device 116 that the target white balance is provided with device 111, target white balance parameter transmitter 112 that device 111 is connected, chromaticity coordinates receiver 113 is set, is connected with said chromaticity coordinates receiver 113 with said target white balance.

Pcb board 12 comprises 6 digital regulation resistances, and per 2 digital regulation resistance parallel connections are one group of test resistance of corresponding R, G, B three coloured light respectively, reaches the purpose of adjustment R, G, B three coloured light brightness through the adjustment digital regulation resistance.

In test process, the user is to host computer 11 input target white balance luminance parameters; Pcb board 12 is according to the REXT resistance of said target white balance luminance parameter adjustment R, G, B three look potentiometers; And target white balance luminance parameter is sent to LED show module 13; In pcb board 12, also comprise simultaneously three groups of digital regulation resistances; Be used for the brightness through resistance control RGB three coloured light of regulating digital regulation resistance, every group of digital regulation resistance is made up of two digital regulation resistances; LED shows that module 13 shows white balance brightness according to said target white balance luminance parameter; LED shows that module parameter acquisition device 14 collection LED show the light that module 13 sends, and obtain the coordinate of R, G, B three coloured light, and said coordinate is sent to host computer 11; Said coordinate that host computer 11 will receive and target white balance luminance parameter compare, if comparing result outside the error allowed band, then changes the luminance parameter that LED shows module 13 through the resistance of regulating the digital regulation resistance on the pcb board 12 again; Up to comparing result within the error allowed band; If comparing result is within the error allowed band, then host computer 11 is through calculating the brightness YR that obtains R, G, B three coloured light, YG; YB; And then R when obtaining to reach the brightness of target white balance, G, the resistance that B three coloured light are required.

As shown in Figure 2, concrete, the user is provided with device 111 through the target white balance target white balance luminance parameter is set, and said target white balance luminance parameter comprises: and target white balance brightness Y, white color coordinate (x, y).Target white balance luminance parameter transmitter 112 sends to target white balance luminance parameter receiver 121 through the communication Serial Port Line with the target white balance luminance parameter that said target white balance is provided with device 111 settings; REXT resistance is provided with device 122 is provided with REXT resistance according to said target white balance luminance parameter resistance; And target white balance luminance parameter is sent to LED through lead show module 13; R, G, B three looks of LED demonstration module 13 are all opened the brightness of display-object white balance; LED demonstration module parameter acquisition device 14 is gathered the chromaticity coordinates (x of R, G, B three coloured light respectively; Y), and with the chromaticity coordinates of said R, G, B three coloured light (x y) sends to chromaticity coordinates receiver 113 through the communication Serial Port Line; Three coloured light brightness calculator 114 are calculated brightness YR, YG, the YB of R, G, B three coloured light respectively according to said target white balance luminance parameter and chromaticity coordinates, and then obtain said YR, YG, YB and calculate the required resistance of three coloured light.

As shown in Figure 3, in another embodiment of the utility model, host computer 11 also comprises three coloured light resistance detectors 115; Be used for transferring to the resistance of R, G, B three coloured light minimum and maximum respectively; Calculate YR, YG, minimum value and maximal value that YB is corresponding, and the brightness that three coloured light brightness calculator 114 are calculated detects, detect brightness that three coloured light brightness calculator 114 calculate whether between brightness minimum value and brightness maximal value; Be then to detect to pass through, confirm the resistance value of three coloured light; Otherwise change said REXT resistance the REXT resistance that device 122 is provided with is set, recomputate R, G, B three coloured light brightness.

As shown in Figure 4 in the another embodiment of the utility model; Host computer 11 also comprises thermal equilibrium detecting device 116, is used for when RGB three coloured light wear out 30% brightness the data of gathering RGB three coloured light in 1 minute; If the data stabilization of RGB three coloured light then reaches thermal equilibrium in 1 minute.

The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection domain of the utility model.

Claims

1. the test macro of LED display white balance brightness is characterized in that, comprises that host computer, pcb board, LED show that module, LED show module parameter acquisition device;

Said pcb board shows that with said LED module is connected through lead;

2. the system of claim 1; It is characterized in that said host computer also comprises: the target white balance is provided with device, with the target white balance target white balance parameter transmitter, chromaticity coordinates receiver, the three coloured light brightness calculator that are connected with the chromaticity coordinates receiver, three coloured light resistance detectors, the thermal equilibrium detecting device that device is connected is set.

3. the system of claim 1 is characterized in that, said pcb board also comprises: target white balance parameter receiver, the REXT resistance that is connected with target white balance parameter receiver are provided with device, with REXT resistance the digital regulation resistance that device is connected are set.

4. system as claimed in claim 3 is characterized in that, said digital regulation resistance is formed by three groups, and every group of digital regulation resistance comprises two digital regulation resistances.