CN207781145U - A kind of backlight test system of liquid crystal module - Google Patents
A kind of backlight test system of liquid crystal module Download PDFInfo
- Publication number
- CN207781145U CN207781145U CN201721745047.6U CN201721745047U CN207781145U CN 207781145 U CN207781145 U CN 207781145U CN 201721745047 U CN201721745047 U CN 201721745047U CN 207781145 U CN207781145 U CN 207781145U
- Authority
- CN
- China
- Prior art keywords
- switch
- back facet
- facet current
- current gear
- backlight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Liquid Crystal (AREA)
Abstract
The utility model is related to liquid crystal module fields, and in particular to a kind of backlight test system of liquid crystal module.A kind of backlight test system of liquid crystal module, the backlight test system includes a handover module, the handover module includes first switch and the second switch, the first switch is connect with two controlling switch of the first back facet current gear of liquid crystal module respectively, and makes the two controlling switch short circuit of the first back facet current gear when being closed；And the second switch is connect with two controlling switch of the second back facet current gear of liquid crystal module respectively, and make the two controlling switch short circuit of the second back facet current gear when being closed.Back facet current can be switched using self-lock switch, operating efficiency is high, avoids handoff error, greatly facilitates operator and switches back facet current, improve operating efficiency, promotes the stability and reliability of switching backlight.
Description
Technical field
The utility model is related to liquid crystal module fields, and in particular to a kind of backlight test system of liquid crystal module.
Background technology
Back facet current output is divided into several gears by the test system of liquid crystal module at present, such as 1MA gears, 20MA gears,
40MA gears, 60MA gears, 80MA gears, each gear is equipped with the short circuit foot position of 2 PIN, according to machine backlight actual power consumption
Stream, with jumper cap at respective notch short circuit.
In liquid crystal module product, easily occur in night by the brightness of liquid crystal module be adjusted to it is partially dark under conditions of, can go out
The phenomenon that existing luminance nonuniformity.In order to intercept this badness, back facet current be adjusted to 1MA carry out analoging brightness to be adjusted to partially dark shape
Condition, and whether detection backlight illumination is uniform under white picture.And the back facet current of other pictures still selects 40MA.
This requires liquid crystal modules when being displayed in white picture, it is desirable that back facet current is switched to 1MA, white picture detection
It finishes, then back facet current is switched back into 40MA.
But switching back facet current by using jumper cap, operating efficiency is poor, and is easy handoff error.
Utility model content
The technical problem to be solved by the present invention is to for the drawbacks described above of the prior art, provide a kind of liquid crystal mould
The backlight of group tests system, solves to switch back facet current by using jumper cap, and operating efficiency is poor, and is easy handoff error
The problem of.
Technical solution adopted by the utility model to solve its technical problems is：A kind of backlight test of liquid crystal module is provided
System, liquid crystal module include multiple back facet current gears, and each back facet current gear is controlled by corresponding two controlling switch,
Two controlling switch is enabled for mutual short circuit, and the backlight test system includes a handover module, and the handover module includes
First switch and the second switch, the first switch connect with two controlling switch of the first back facet current gear of liquid crystal module respectively
It connects, and makes the two controlling switch short circuit of the first back facet current gear when being closed；And the second switch respectively with liquid crystal mould
Two controlling switch of the second back facet current gear of group connect, and make two controlling switch of the second back facet current gear when being closed
Short circuit；Wherein, the back facet current of the first back facet current gear is less than the back facet current of the second back facet current gear.
Wherein, preferred version is：The handover module further includes a relay, backlight test system further include one with
The power supply of relay connection, relay control first switch when power supply is powered or powers off unlatches and closes, and control
Second switch is closed and is opened.
Wherein, preferred version is：The relay is OMRON G5V-2.
Wherein, preferred version is：First controlling switch of the fixing end of the first switch and the first back facet current gear
Connection, first choice end is hanging, and the second selection end is connect with the second controlling switch of the first back facet current gear；Described
The fixing end of two switches is connect with the first controlling switch of the second back facet current gear, and the second selection end is hanging, the first choosing
End is selected to connect with the second controlling switch of the second back facet current gear；The relay controls first switch in power cut-off will
Fixing end is connected to the second selection end, and fixing end is connected to the second selection end by control second switch, and the relay exists
Fixing end is connected to first choice end by control first switch when power supply is powered, and fixing end is connected to by control second switch
First choice end.
Wherein, preferred version is：The handover module further includes third switch, third switch respectively with power supply and
Relay connects.
Wherein, preferred version is：The third switch is self-lock switch.
Wherein, preferred version is：The backlight test system further includes the indicating module being connect with power supply, the instruction mould
Block includes the resistance being connected in series with power supply and LED light.
Wherein, preferred version is：The power supply includes DC power supply and power interface, the power interface respectively with instruction
Module is connected with relay.
Wherein, preferred version is：The power interface is DC002 sockets.
Wherein, preferred version is：The first back facet current gear is 1MA gears, and the second back facet current gear is 40MA
Gear.
The beneficial effects of the utility model are, compared with prior art, the utility model by be arranged first switch and
Second switch controls the switching of the back facet current of liquid crystal module, is especially controlled using relay, and realization automatically controls；And it is logical
It crosses third switch and realizes relay control, back facet current can be switched using self-lock switch, operating efficiency is high, avoids switching wrong
Accidentally, it greatly facilitates operator and switches back facet current, improve operating efficiency, promote the stability and reliability of switching backlight.
Description of the drawings
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing：
Fig. 1 is the structural schematic diagram of the utility model backlight test system；
Fig. 2 is the structural schematic diagram that the utility model tests system based on relay backlight；
Fig. 3 is the structural schematic diagram of the embodiment one of Fig. 2；
Fig. 4 is the structural schematic diagram of the embodiment two of Fig. 2；
Fig. 5 is the structural schematic diagram for the handover module that the utility model is switched based on third；
Fig. 6 is the structural schematic diagram of the utility model indicating module.
Specific implementation mode
In conjunction with attached drawing, elaborate to the preferred embodiment of the utility model.
As shown in Figure 1, the utility model provides a kind of preferred embodiment of the backlight test system of liquid crystal module.
A kind of backlight of liquid crystal module 10 tests system, and liquid crystal module 10 includes multiple back facet current gears, each backlight
Electric current gear is controlled by corresponding two controlling switch, and two controlling switch is enabled for mutual short circuit, the backlight test
System includes a handover module 20, and the handover module 20 includes first switch 21 and second switch 22, the first switch 21
It is connect respectively with two controlling switch of the first back facet current gear of liquid crystal module 10, and makes the first back facet current shelves when being closed
The two controlling switch short circuit of position；And the second switch 22 respectively with the second back facet current gear of liquid crystal module 10 two
Controlling switch connects, and makes the two controlling switch short circuit of the second back facet current gear when being closed；Wherein, the first backlight electricity
The back facet current for flowing gear is less than the back facet current of the second back facet current gear.
Specifically, liquid crystal module 10 is controlled when being displayed in white picture or other pure color pictures by handover module 20
First switch 21 is closed, and control second switch 22 disconnects, and the back facet current output gear of the liquid crystal module 10 is first back of the body
Photoelectric current gear；After the completion of completing above-mentioned luminance nonuniformity detection, first switch 21 is controlled by handover module 20 and is disconnected, and control
Second switch 22 processed is closed, and the back facet current output gear of the liquid crystal module 10 is the second back facet current gear, and by liquid
Brilliant module 10 is showing other pictures, carries out luminance nonuniformity detection again.
Back facet current output is divided into several gears, such as 1MA gears, 20MA gears, and 40MA gears, 60MA gears, 80MA grades
Position, each back facet current gear is controlled by corresponding two controlling switch, when two controlling switch that wherein one matches are mutual
When short circuit, the back facet current output gear of liquid crystal module 10 will be the gear, however, it is necessary to only there was only two controls of a pairing
Pin short circuit processed, and controlling switch is hanging or ground connection.
Preferably, the first back facet current gear is 1MA gears, and the second back facet current gear is 40MA gears.
As shown in Figures 2 to 4, the utility model provides a kind of preferred embodiment of the handover module based on relay.
The handover module 20 further includes a relay 23, and backlight test system further includes one being connect with relay 23
Power supply 30, the control first switch 21 when power supply 30 is powered or powers off of the relay 23 unlatches and closes, and control the
Two switches 22 are closed and are opened.
Wherein, 23 (English name of relay：Relay it is) a kind of electric control device, is the change when input quantity (energizing quantity)
When change reaches prescribed requirement, make controlled volume that a kind of electric appliance of scheduled Spline smoothing occur in electrical output circuit.It has
Control system (also known as input circuit) and by the interactive relationship between control system (also known as output loop).It is usually applied to automatic
In the control circuit of change, it is actually one kind " automatic switch " that control high current running is gone with low current.
Specifically, relay 23 can control first switch 21 and second switch 22 to be turned on and off, further, relay
When 23 power-off, first switch 21 is opened and second switch 22 is closed；And when the energization of relay 23, second switch 22 is opened, and
First switch 21 is closed.
Preferably, the relay 23 is OMRON G5V-2, i.e. operating voltage is the relay 23 of 5V.
In the present embodiment, and with reference to figure 3 and Fig. 4, the fixing end of the first switch 21 and the first back facet current gear
The connection of the first controlling switch, first choice end is hanging, the second control of the second selection end and the first back facet current gear
Pin connects；The fixing end of the second switch 22 is connect with the first controlling switch of the second back facet current gear, the second choosing
It is hanging to select end, first choice end is connect with the second controlling switch of the second back facet current gear；The relay 23 is in power supply
Fixing end is connected to the second selection end by control first switch 21 when 30 power-off, and control second switch 22 connects fixing end
To the second selection end, the relay 23 controls first switch 21 when power supply 30 is powered and fixing end is connected to first choice
Fixing end is connected to first choice end by end, and control second switch 22.
As shown in figure 5, the utility model provides a kind of preferred embodiment of the handover module 20 switched based on third.
The handover module 20 further includes a third switch 24, the third switch 24 respectively with power supply 30 and relay 23
Connection.Specifically, if third switch 24 is closed, relay 23 is powered, if third switch 24 disconnects, relay 23 disconnects.
Preferably, the third switch 24 is self-lock switch.Self-lock switch is a kind of common button switch.It is switching
On time for the first time, switch connection is simultaneously kept button, i.e. self-locking, switch button for the second time on time, switch disconnects, and Simultaneous Switching is pressed
Button pop-up comes.By self-lock switch, the energization of guard relay 23 or power-off continuous state, convenient for being examined to liquid crystal module 10
It surveys.
Back facet current can be switched by self-lock switch, operating efficiency is high, will not handoff error.And existing technology can only
Switch back facet current by jumper cap, operating efficiency is poor, easy handoff error.
As shown in fig. 6, the utility model provides a kind of preferred embodiment of indicating module.
The backlight test system further includes the indicating module 40 being connect with power supply 30, and the indicating module 40 includes and electricity
The resistance and LED light that source 30 is connected in series with.Specifically, when power supply 30 powers on, LED light is bright, and expression can operate third switch
24 control relays 23 are turned on and off.
In the present invention, the power supply 30 includes 30 interface of DC power supply 30 and power supply, 30 interface of the power supply point
It is not connect with indicating module 40 and relay 23.Wherein, DC power supply 30 is preferably 5 volt DC power supplys 30.
Preferably, 30 interface of the power supply is DC002 sockets.
In the present invention, through the above scheme, it greatly facilitates operator and switches back facet current, improve operation effect
Rate promotes the stability and reliability of switching backlight.
As described above, only the best embodiment of the utility model is not intended to limit the scope of the utility model,
All equivalent change or modifications made according to the patent scope of the utility model are all that the utility model is covered.
Claims (10)
1. a kind of backlight of liquid crystal module tests system, liquid crystal module includes multiple back facet current gears, each back facet current shelves
Position is controlled by corresponding two controlling switch, and two controlling switch is enabled for mutual short circuit, it is characterised in that：The backlight
Test system include a handover module, the handover module includes first switch and the second switch, the first switch respectively with
Two controlling switch of the first back facet current gear of liquid crystal module connect, and make two controls of the first back facet current gear when being closed
Pin short circuit processed；And the second switch is connect with two controlling switch of the second back facet current gear of liquid crystal module respectively,
And make the two controlling switch short circuit of the second back facet current gear when being closed；Wherein, the backlight of the first back facet current gear
Electric current is less than the back facet current of the second back facet current gear.
2. backlight according to claim 1 tests system, it is characterised in that：The handover module further includes a relay,
Backlight test system further includes power supply connect with relay, and the relay controls the in power supply energization or power-off
One unlatches and closes, and control second switch is closed and opened.
3. backlight according to claim 2 tests system, it is characterised in that：The relay is OMRONG5V-2.
4. backlight according to claim 2 tests system, it is characterised in that：The fixing end of the first switch and first back of the body
First controlling switch of photoelectric current gear connects, and first choice end is hanging, the second selection end and the first back facet current gear
The second controlling switch connection；The fixing end of the second switch is connect with the first controlling switch of the second back facet current gear,
Its second selection end is hanging, and first choice end is connect with the second controlling switch of the second back facet current gear；The relay
First switch is controlled in power cut-off, fixing end is connected to the second selection end, and control second switch connects fixing end
To the second selection end, the relay controls first switch when power supply is powered and fixing end is connected to first choice end, and
Fixing end is connected to first choice end by control second switch.
5. backlight according to claim 2 or 4 tests system, it is characterised in that：The handover module further includes a third
Switch, the third switch are connect with power supply and relay respectively.
6. backlight according to claim 5 tests system, it is characterised in that：The third switch is self-lock switch.
7. backlight according to claim 2 tests system, it is characterised in that：Backlight test system further includes and power supply
The indicating module of connection, the indicating module include the resistance being connected in series with power supply and LED light.
8. backlight according to claim 7 tests system, it is characterised in that：The power supply includes that DC power supply and power supply connect
Mouthful, the power interface is connect with indicating module and relay respectively.
9. backlight according to claim 8 tests system, it is characterised in that：The power interface is DC002 sockets.
10. backlight according to claim 1 tests system, it is characterised in that：The first back facet current gear is 1MA grades
Position, the second back facet current gear are 40MA gears.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721745047.6U CN207781145U (en) | 2017-12-14 | 2017-12-14 | A kind of backlight test system of liquid crystal module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721745047.6U CN207781145U (en) | 2017-12-14 | 2017-12-14 | A kind of backlight test system of liquid crystal module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207781145U true CN207781145U (en) | 2018-08-28 |
Family
ID=63232284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721745047.6U Active CN207781145U (en) | 2017-12-14 | 2017-12-14 | A kind of backlight test system of liquid crystal module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207781145U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111212281A (en) * | 2020-01-14 | 2020-05-29 | 深圳市金锐显数码科技有限公司 | Video board detection method and detection device |
-
2017
- 2017-12-14 CN CN201721745047.6U patent/CN207781145U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111212281A (en) * | 2020-01-14 | 2020-05-29 | 深圳市金锐显数码科技有限公司 | Video board detection method and detection device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103607800B (en) | Intelligent dimming module and intelligent dimming LED and control method thereof | |
| CN102231261B (en) | Drive circuit of LED (light-emitting diode) backlight and control method thereof | |
| CN105263233A (en) | Intelligent lamplight control system based on WIFI and control method | |
| CN102682698A (en) | Driving circuit, driving power supply and display device | |
| CN102307413A (en) | Method and device for displaying any color by using RGB (Red, Green and Blue) three-color indicating lamps | |
| CN107346167A (en) | The method and device of a kind of display control | |
| CN203896567U (en) | Intelligent eyecare LED desk lamp | |
| CN207781145U (en) | A kind of backlight test system of liquid crystal module | |
| CN201868067U (en) | LED static module testing card | |
| CN203378124U (en) | Projector LED light source drive module with single step-down converter | |
| CN206629305U (en) | Light modulation toning controller based on infrared induction and by key control | |
| CN206118124U (en) | But low pressure is remote control light modulation lamp cluster regularly | |
| CN201332524Y (en) | State indicating lamp control device | |
| CN205546053U (en) | LED bluetooth intelligent control ware | |
| CN106937442A (en) | Based on infrared induction and light modulation toning controller and its method by key control | |
| CN208737868U (en) | A kind of display of band control adaptive environment brightness | |
| CN207602195U (en) | Display module and its drive control circuit | |
| CN207491244U (en) | A kind of light-operated driving control system of double induction LEDs | |
| CN209590183U (en) | Backlight LED circuit open detection circuit and test fixture | |
| CN208337972U (en) | Loop control unit and loop control system | |
| CN207425325U (en) | A kind of double backlight control circuits of LED and double backlight LED matrixs | |
| CN206563891U (en) | Cooking utensil | |
| CN207367576U (en) | PWM dimming circuit, backlight module, liquid crystal display module and terminal | |
| CN207318976U (en) | A kind of non-contact switch control system | |
| CN202285448U (en) | Brightness switching device of LED lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |