CN104599648B - A kind of LCM modules detection tool of optional electric current - Google Patents
A kind of LCM modules detection tool of optional electric current Download PDFInfo
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- CN104599648B CN104599648B CN201410763620.0A CN201410763620A CN104599648B CN 104599648 B CN104599648 B CN 104599648B CN 201410763620 A CN201410763620 A CN 201410763620A CN 104599648 B CN104599648 B CN 104599648B
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- backlight
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- lcm modules
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Abstract
The present invention discloses a kind of LCM modules heating tool of optional electric current, including the optional circuit of DC power source adapter, system board, back facet current；System board includes MCU master controls IC, DC DC reduction voltage circuits, backlight voltage booster circuit and LED drivings IC, DC power source adapter connects the input of backlight voltage booster circuit and the input of DC DC reduction voltage circuits respectively, backlight voltage booster circuit output end connects the LED backlight of LCM modules to be measured, the output end of DC DC reduction voltage circuits connects MCU master controls IC and LED driving IC respectively, MCU master controls IC output end connects the LCD liquid crystal displays of LED driving IC and LCM modules to be measured respectively, LED drivings IC output end connection backlight voltage booster circuit, LED drivings IC output end is connected by the optional circuit of back facet current with the LED backlight of LCM modules to be measured.The present invention is simple in construction, and easy to carry, testing expense is low.
Description
Technical field
Controlled the present invention relates to the LCM modules heating of a kind of heating tool of LCM modules, more particularly to a kind of optional electric current
Tool.
Background technology
The heating tool of traditional LCM modules is generally adopted by the structure of signal-processing board+LED driving plates, the LED
The back facet current of driving plate only has one grade, and per secondary change electric current, output must make corresponding resistance value and change, numerous with getting up
It is trivial time-consuming, and counter plate heating when have to persistently have signal source input, while the heating tool volume of existing LCM modules compared with
Greatly, it is expensive.
Specifically, there are the following problems for the heating tool of existing LCM modules：
1）The electric current that various sizes of module group backlight needs is different, and current plank just must constantly go to change resistance
Value exports corresponding electric current, and this process is cumbersome time-consuming, waste of manpower.
2）The backlight tool different with panel needs is lighted to realize.
3）Lighting panel needs an expensive LVDS signal generator.
The content of the invention
It can be provided not according to different module group backlights it is an object of the invention to overcome the deficiencies of the prior art and provide a kind of
The same electric current, and without the LCM modules heating tool of extra LVDS signal generators.
The technical solution adopted by the present invention is：
A kind of LCM modules heating tool of optional electric current, including DC power source adapter, system board, back facet current can
Select circuit；The system board includes MCU master control IC, DC-DC reduction voltage circuit, backlight voltage booster circuit and LED and drives IC, described straight
Stream power supply adaptor connects the input of backlight voltage booster circuit and the input of DC-DC reduction voltage circuits, backlight voltage booster circuit respectively
Output end connects the LED backlight of LCM modules to be measured, and the output end of DC-DC reduction voltage circuits connects MCU master controls IC and LED respectively
IC is driven, MCU master controls IC output end connects the LCD liquid crystal displays of LED driving IC and LCM modules to be measured respectively, LED drivings IC's
Output end connects backlight voltage booster circuit, and LED drivings IC output end passes through the optional circuit of back facet current and LCM modules to be measured
LED backlight is connected.
The optional circuit of back facet current is connected to the ISEN pins of the LED backlight of LCM modules to be measured.
The optional circuit of back facet current has different resistances and parallel with one another by a multidiameter option switch and more than two
Resistance composition.
The MCU master controls IC is pre-stored with test pictures information.
The system board also includes DVI interface module and USB interface module, DVI interface module connection MCU master controls IC's
Input, USB interface module connection MCU master controls IC input.
The present invention uses above technical scheme, selects each electric current gear by the optional circuit of back facet current, meets each chi
The current needs of very little module group backlight, while being believed using the test pictures for the storage that prestored on the MCU master controls IC on display system plate
Breath (it is red it is green it is blue it is black it is white, it is optional) heating test is carried out to LCM modules, provide signal source without external device.Present invention knot
Structure is simple, and easy to carry, testing expense is low.
Brief description of the drawings
The present invention is described in further details below in conjunction with the drawings and specific embodiments；
A kind of LCM modules of optional electric current of Fig. 1 present invention heat the structural representation of tool；
A kind of circuit diagram of the optional circuit of back facet current of the LCM modules heating tool of optional electric current of Fig. 2 present invention.
Embodiment
As shown in Figure 1 or 2, the present invention includes DC power source adapter, system board, the optional circuit of back facet current；Institute
Stating system board includes MCU master control IC, DC-DC reduction voltage circuit, backlight voltage booster circuit and LED driving IC, and the dc source is fitted
Orchestration connects the input of backlight voltage booster circuit and the input of DC-DC reduction voltage circuits respectively, and backlight voltage booster circuit output end connects
The LED backlight of LCM modules is surveyed in reception, and the output end of DC-DC reduction voltage circuits connects MCU master controls IC and LED driving IC respectively,
MCU master controls IC output end connects the LCD liquid crystal displays of LED driving IC and LCM modules to be measured respectively, and LED drives IC output end
Backlight voltage booster circuit is connected, LED drivings IC output end passes through the LED backlight of the optional circuit of back facet current and LCM modules to be measured
Source is connected.
The optional circuit of back facet current is connected to the ISEN pins of the LED backlight of LCM modules to be measured.
The optional circuit of back facet current has different resistances and parallel with one another by a multidiameter option switch and more than two
Resistance composition.
The MCU master controls IC is pre-stored with test pictures information, such as white image information, and when practical operation, user can press
Demand can prestore other test pictures information (it is red it is green it is blue it is black it is white, it is optional).
The system board also includes DVI interface module and USB interface module, DVI interface module connection MCU master controls IC's
Input, USB interface module connection MCU master controls IC input.Outside source can pass through DVI interface module and VGA respectively
The corresponding signal of interface module input signal.
Just the modules operation principle of the present invention is illustrated below：
The LCM modules to be detected of the present invention are to include LED backlight and LCD liquid crystal displays.Heating tool is needed to LCD liquid
Crystalline substance screen provides signal and heated.When only providing backlight electric power to LCM modules and not providing signal source, IPS screens are dark
Picture, TN screens are white picture, it is clear that if the module of IPS screens is to be not easy to back-light mechanism engineer to observe different in this case
The backlight bad phenomenon such as thing.
DC power source adapter provides DC-DC reduction voltage circuits of the direct current 12V to system board, by DC-DC reduction voltage circuits point
Chan Sheng not 5V and 3.3V DC voltages, the LCD liquid crystal displays work of 5V voltages supply MCU master controls IC and LCM modules to be measured；3.3V make
The operating voltage of IC, DVI interface module and USB interface module is driven for LED.
Started working after the 12V voltages of system board access DC power source adapter, in the flash memory inside the MCU master controls
The advance burning in face has the display program of the LCD liquid crystal displays of LCM modules to be measured, the program of control LED driving IC work and test picture
Face information.On the one hand, by the driving LED driving IC work of MCU master control IC internal processes, LED drivings IC coordinates loop structure around it
Into backlight voltage booster circuit DC voltage 12V is boosted to the operating voltage 48V of LED backlight or so of LCM modules to be measured.Together
When user can be autonomous by the optional circuit of back facet current according to the current needs of the backlight of various different size LCM modules
The corresponding current value of selection, LED driving IC export corresponding electric current to LCM modules to be measured backlight.On the other hand, MCU
The LCD liquid crystal displays of master control IC driving LCM modules are shown, and convey test pictures information when MCU master controls IC enters aging mode
The LCD liquid crystal displays of LCM modules are heated.Now engineer can observe liquid crystal display picture, to have observed foreign etc.
The bad phenomenon of various backlights.
In addition, after the heating of LCM modules, can when the image quality of more pictures detection LCD liquid crystal displays is carried out if desired
So that outer signals source directly is accessed into DVI interface module/USB interface module, related controlling transmission is being carried out by MCU master controls IC
Just can be with.
The test pictures information of the invention that prestored in MCU master controls IC flash memory, such as white image information, during practical operation
Wait, user can prestore on demand other test pictures information (it is red it is green it is blue it is black it is white, it is optional).MCU master controls IC is being opened
After aging working condition, it is not necessary to be connected into signal source from outside by DVI interface module/USB interface module, heating tool is being powered
White image information can be just conveyed after start to heat the LCD liquid crystal displays of LCM modules.And either IPS screens and TN screens
LCM modules heating tool start after all show white picture, both realized to LCM modules heat, observe liquid crystal display picture,
Back-light mechanism engineer observation is facilitated to have the bad phenomenon of the various backlights such as foreign.
Secondly, in the prior art, a current value is only corresponded in the LCM modules for a kind of size or a kind of species, its
LED is set to drive IC to export a fixed current value on circuit by the ratio of a pair of resistance.Invention increase
The optional circuit of back facet current, the electric current needed for for selecting various sizes of backlight module to provide it, by original independent one
The electric current of shelves sets loop to make the optional circuit of the optional back facet current of multi gear electric current into, so as to meet more sizes and species
LCM backlight current demands.User can be according to the selection of the current needs of the backlight of various different size LCM modules independently
Corresponding current value, cooperated with LED driving IC is heated to LCM modules.
Furthermore, the present invention is provided with DVI interface module/USB interface module so that after the heating of LCM modules, if desired
When carrying out more pictures and detect the image quality of LCD liquid crystal displays, can directly by outer signals source access DVI interface module/
USB interface module, just can be with carrying out related controlling transmission by MCU master controls IC.
In summary, the present invention selects each electric current gear by the optional circuit of back facet current, and user can be according to various
The corresponding current value of selection of the current needs of the backlight of different size LCM modules independently is heated to LCM modules, simultaneously
Using the storage that prestored on the MCU master controls IC on display system plate test pictures (it is red it is green it is blue it is black it is white, it is optional) to LCM moulds
Group carries out heating test, and signal source is provided without external device.The present invention is simple in construction, and easy to carry, testing expense is low.
Claims (4)
1. a kind of LCM modules heating tool of optional electric current, it is characterised in that：It include DC power source adapter, system board,
The optional circuit of back facet current；The system board includes MCU master control IC, DC-DC reduction voltage circuit, backlight voltage booster circuit and LED and driven
Dynamic IC, the DC power source adapter connects the input of backlight voltage booster circuit and the input of DC-DC reduction voltage circuits respectively, carries on the back
Light booster circuit output end connects the LED backlight of LCM modules to be measured, and the output end of DC-DC reduction voltage circuits connects MCU master respectively
The output end for controlling IC and LED drivings IC, MCU master controls IC connects the LCD liquid crystal displays of LED driving IC and LCM modules to be measured respectively,
LED driving IC output end connection backlight voltage booster circuit, LED driving IC output end by the optional circuit of back facet current with it is to be measured
The LED backlight connection of LCM modules, the optional circuit of back facet current has difference by a multidiameter option switch and more than two
Resistance and resistance composition parallel with one another.
2. a kind of LCM modules heating tool of optional electric current according to claim 1, it is characterised in that：The backlight electricity
Flow the ISEN pins that optional circuit is connected to the LED backlight of LCM modules to be measured.
3. a kind of LCM modules heating tool of optional electric current according to claim 1, it is characterised in that：The MCU master controls
IC is pre-stored with test pictures information.
4. a kind of LCM modules heating tool of optional electric current according to claim 1, it is characterised in that：The system master
Plate also includes DVI interface module and USB interface module, DVI interface module connection MCU master controls IC input, USB interface module
Connect MCU master controls IC input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410763620.0A CN104599648B (en) | 2014-12-11 | 2014-12-11 | A kind of LCM modules detection tool of optional electric current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410763620.0A CN104599648B (en) | 2014-12-11 | 2014-12-11 | A kind of LCM modules detection tool of optional electric current |
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| Publication Number | Publication Date |
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| CN104599648A CN104599648A (en) | 2015-05-06 |
| CN104599648B true CN104599648B (en) | 2017-09-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106652861B (en) * | 2016-11-30 | 2020-12-04 | 广州视源电子科技股份有限公司 | Detection method and device for display screen |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101340760A (en) * | 2007-07-06 | 2009-01-07 | Nec液晶技术株式会社 | Light-emitting control circuit, light-emitting control method, plane illumination device and liquid crystal display device with the plane illumination device |
| CN201382850Y (en) * | 2009-03-24 | 2010-01-13 | Tcl集团股份有限公司 | Test device for liquid crystal display module |
| CN203746391U (en) * | 2013-09-25 | 2014-07-30 | 武汉精立电子技术有限公司 | LCM testing device based on virtual instrument |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100453177B1 (en) * | 1998-09-19 | 2005-04-08 | 엘지.필립스 엘시디 주식회사 | Liquid Crystal Display with Black Layer and Fabricating Method Thereof |
| CN2859732Y (en) * | 2006-01-19 | 2007-01-17 | 汕头超声显示器有限公司 | LCD module testing instrument |
| CN101655619B (en) * | 2009-09-28 | 2011-01-12 | 武汉精测电子技术有限公司 | LCM testing system |
| CN202171929U (en) * | 2011-05-31 | 2012-03-21 | 贺术春 | LCM module group test system |
| CN202435264U (en) * | 2011-12-27 | 2012-09-12 | Tcl显示科技（惠州）有限公司 | Power supplying power supply device of liquid crystal module (LCM) test system |
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2014
- 2014-12-11 CN CN201410763620.0A patent/CN104599648B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101340760A (en) * | 2007-07-06 | 2009-01-07 | Nec液晶技术株式会社 | Light-emitting control circuit, light-emitting control method, plane illumination device and liquid crystal display device with the plane illumination device |
| CN201382850Y (en) * | 2009-03-24 | 2010-01-13 | Tcl集团股份有限公司 | Test device for liquid crystal display module |
| CN203746391U (en) * | 2013-09-25 | 2014-07-30 | 武汉精立电子技术有限公司 | LCM testing device based on virtual instrument |
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