CN104409453B - LED encapsulation structure, LED display system and bad lamp detection method - Google Patents
LED encapsulation structure, LED display system and bad lamp detection method Download PDFInfo
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- CN104409453B CN104409453B CN201410606083.9A CN201410606083A CN104409453B CN 104409453 B CN104409453 B CN 104409453B CN 201410606083 A CN201410606083 A CN 201410606083A CN 104409453 B CN104409453 B CN 104409453B
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Abstract
The present invention relates to field of LED display, more particularly, to a kind of LED encapsulation structure, LED display system and bad lamp detection method.LED encapsulation structure includes being encapsulated in the main LED of ground floor, is encapsulated in the backup LED of the second layer and is encapsulated in the photodiode of third layer, and three-decker is packaged together by integrated circuit technology and is respectively kept with the interface of external circuitses.Main LED and backup LED is directly packaged with LED encapsulation structure of the invention, directly switching backup LED carrys out work when bad lamp can occur in main LED when being applied to LED display system, can be prevented effectively from the display stain problem that dead light bar is come in LED display system.
Description
Technical field
The present invention relates to field of LED display, more particularly, to a kind of LED encapsulation structure, LED display system and bad
Lamp detection method.
Background technology
The display system constituted in PCB substrate referred to as LED display system, this display are attached to by multiple color LED arrays
System has the advantages that brightness is high, bright in luster, visual angle is big, low in energy consumption.With put between LED away from reduction, this system gets over
It is widely used in the industry of monitoring and broadcasting and TV to get over.
In LED display system, the light-emitting diodes tube core of three kinds of colors of RGB is generally comprised inside each color LED lamp
Piece, the light emitting diode construction for using at present in use for some time, easily because driving current is excessive or exterior static
The reason for cause electrical breakdown.Destroyed LED will not shinny or brightness it is dark, the shape in whole LED display system
It is right if video camera is just shot when in bad point in the more harsh usage scenario such as radio, TV and film industries into a pore
Program influence is larger.
Based on the bad point problem in LED display system, in the prior art there is provided a kind of side in parallel by multiple LED chips
Case, after having LED chip to break down, is replaced, and be corrected by brightness point by point adjustment by other LED of its parallel connection.This scheme
Although the stain problem that bad lamp is brought can be avoided the occurrence of, this scheme is in order to ensure the uniformity of display effect, it is necessary to enter
Row gamma correction, and need the pointwise to carry out brightness adjustment during gamma correction, this depends on the equipment of specialty, and needs specialty
The contact staff of knowledge is on the scene could to complete, and the audient that this scheme is faced is professional person, be not suitable for commonly used person and find to ask
Settled a dispute by the parties concerned themselves after topic.Additionally, big screen display screen is used widely at present, when such scheme is applied to big screen display screen
When, the positioning difficulty to bad point increases, based on such scheme it is difficult to find the position of bad point in giant-screen.
In the technical scheme of the bad point occurred in another detection LED display system, resistance plus A/D conversions are used
The mode of device detects the electric current of LED to detect bad point one by one in LED display system, and this mode is with curent change to judge bar
Part, but the become reconciled electric current of lamp of bad lamp there may exist identical situation in practical application, therefore judged based on curent change
There is certain missing inspection in the quality of lamp, that is to say, that this scheme can not very detect bad lamp.
The content of the invention
The present invention is to overcome at least one defect (deficiency) described in above-mentioned prior art, there is provided a kind of LED encapsulation structure,
LED display system and bad lamp detection method, can be prevented effectively from the display stain that dead light bar is come in LED display system and ask
Topic.
In order to solve the above technical problems, technical scheme is as follows：
A kind of LED encapsulation structure, including be encapsulated in the main LED of ground floor, be encapsulated in the backup LED of the second layer and be encapsulated in
The photodiode of third layer, three-decker is packaged together by integrated circuit technology and is respectively kept with connecing for external circuitses
Mouthful.
Main LED and backup LED are directly packaged with LED encapsulation structure of the invention, can be with when being applied to LED display system
Directly switching backup LED carrys out work when there is bad lamp in main LED, can be prevented effectively from LED display system dead light bar
Display stain problem.And photodiode is also encapsulated in the LED encapsulation structure, it is photosensitive when being applied to LED display system
Diode can detect to the luminance of main LED, backup LED cannot be switched to during normal luminous in main LED, so as to protect
Each is put and can normally show to demonstrate,prove LED display system.The working condition of photodiode corresponds to the light and shade of main LED, so that root
It is capable of detecting when there is bad lamp in main LED according to photodiode, switching standards is provided for LED display system switches to backup LED.
A kind of LED display system, including drive circuit and LED chip, also including the control module being connected with drive circuit,
The LED chip uses LED encapsulation structure described above, and drive circuit connects main LED in LED encapsulation structure and standby respectively
Part LED, photodiode is connected with control module；Drive circuit drives main LED operation, and control module is according to photodiode
Control drive circuit switches to driving backup LED operation when real-time current judges that main LED is damaged.
In LED display system of the invention, main LED, backup LED and photodiode are encapsulated in each LED chip, profit
With photodiode can to each LED chip in the luminance of main LED detect, cannot normal luminous in main LED
When by the control of control module, drive circuit is switched to driving backup LED operation, thus ensure LED display system each
Point can normally show.Connect with drive circuit due to being provided with backup LED, backup LED and main LED in each LED chip
Connect, when bad lamp occurs in main LED, drive circuit can in time be switched to backup LED operation, it is ensured that the normal of LED display system shows
Show, the display stain problem that dead light bar is come in LED display system can be prevented effectively from.
And the present invention using be that photodiode is detected to the luminance of main LED, and be one main LED pairs
Answering a photodiode, photodiode can be responded according to the light and shade of main LED, can accurately detect correspondence master
The luminance of LED such that it is able to be accurately judged to the bad lamp of main LED, the accuracy rate of detection is high.And all photodiodes
Can work simultaneously, while detecting that detection efficiency is high to all of main LED.Also, due to the photodiode for using,
It is with low cost, compact, it is easy to popularization and application.
Additionally, the present invention is monitored using the current status that control module focuses quick diode automatically, and using control
Module automatically controls drive circuit and main LED and backup LED is switched over, high degree of automation, equipment without specialty and special
Industry knowledge, audient can also be able to be commonly used person for professional person, and Consumer's Experience is good, practical.
A kind of bad lamp detection method, bad lamp inspection survey is carried out to LED display system described above, and methods described includes：
When main LED and backup LED include the LED chip of three kinds of colors of RGB respectively, control module control drives electricity
The red, green and blue LED chip in all main LED in LED display system is lighted in road timesharing；
Whether control module up time judges there are main LED bad lamps in LED display system according to the real-time current of photodiode,
The all backup LED operations of direct controlling and driving circuit drives if having；
When main LED and backup LED include single primary colors LED chip respectively, control module control drive circuit drives LED to show
All main LED light single primary colors LED chip in showing system；
Whether control module judges there are main LED bad lamps in LED display system according to the real-time current of photodiode, if having
Then all backup LED operations of direct controlling and driving circuit drives.
In bad lamp detection method of the invention, three kinds of color LED of RGB are included respectively corresponding to main LED and backup LED
The situation of chip, the present invention controls drive circuit timesharing to light three kinds of LED of color in all LED by control module first
Chip, can detect the light and shade of LED chip, therefore control module according to the real-time current of photodiode due to photodiode
May determine that in main LED whether there is bad lamp, control drive circuit to switch over if having, so that stop the driving to main LED, directly
Connect and be switched to all backup LED operations of driving.It is photosensitive due to being provided with backup LED and photodiode in each LED chip
The luminance of the main LED of diode pair is detected, and is one photodiode of a main LED correspondence, photodiode energy
It is enough to be responded according to the light and shade of main LED, can accurately detect the luminance of the main LED of correspondence such that it is able to accurate to judge
Go out the bad lamp of main LED, the accuracy rate of detection is high, main LED and backup LED can be switched in real time after detecting bad lamp, energy
Enough it is prevented effectively from the display stain problem that dead light bar is come in LED display system.And all photodiodes can be while work
Make, while detecting that detection efficiency is high to all of main LED.Also, due to the photodiode for using, with low cost, body
Product is compact, it is easy to popularization and application.
Additionally, bad lamp detection method of the invention is supervised using the current status that control module focuses quick diode automatically
Survey, and automatically control drive circuit and main LED and backup LED are switched over, high degree of automation, equipment without specialty and special
Industry knowledge, audient can also be able to be commonly used person for professional person, and Consumer's Experience is good, practical.
Brief description of the drawings
Fig. 1 is a kind of structural representation of LED encapsulation structure specific embodiment of the invention.
Fig. 2 is a kind of structural representation of LED display system specific embodiment of the invention.
Fig. 3 is a kind of flow chart of bad lamp detection method specific embodiment of the present invention.
Fig. 4 is the schematic diagram to sub- lamp plate positioning in a kind of bad lamp detection method of the present invention.
Specific embodiment
Accompanying drawing being for illustration only property explanation, it is impossible to be interpreted as the limitation to this patent；
In order to more preferably illustrate the present embodiment, accompanying drawing some parts have omission, zoom in or out, and do not represent actual product
Size；
To those skilled in the art, it can be to understand that some known features and its explanation may be omitted in accompanying drawing
's.
In the description of the invention, it is to be understood that the orientation or position relationship of the instruction such as term " longitudinal direction " are base
In orientation shown in the drawings or position relationship, it is for only for ease of and describes the present invention and simplify to describe, rather than instruction or dark
Showing the device or element of meaning must have specific orientation, with specific azimuth configuration and operation therefore it is not intended that right
Limitation of the invention.Additionally, term " first ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that indicating or dark
Show relative importance or imply the quantity of indicated technical characteristic.Thus, the feature of " first ", " second " of restriction can be with bright
Show or implicitly include one or more this feature.In the description of the invention, unless otherwise indicated, the implication of " multiple "
It is two or more.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " company
Connect " should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or it is integrally connected；It can be machine
Tool is connected, or electrically connected；It can be joined directly together, or be indirectly connected with by intermediary, it may be said that two
The connection of element internal.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood in the present invention
Concrete meaning.
Technical scheme is described further with reference to the accompanying drawings and examples.
Embodiment 1
As shown in figure 1, being a kind of structural representation of LED encapsulation structure specific embodiment of the invention.Referring to Fig. 1, this tool
A kind of LED encapsulation structure of body embodiment, including be encapsulated in ground floor main LED1, be encapsulated in the second layer backup LED2 and encapsulation
In the photodiode 3 of third layer, three-decker is packaged together by integrated circuit technology and is respectively kept with external circuitses
Interface.
In a particular embodiment, LED encapsulation structure is directly by main LED1, backup LED2 and for detecting that main LED lights shape
The photodiode 3 of state is packaged together, and compact conformation is compact, is suitable in LED display system.In the LED encapsulation structure
Main LED1 and backup LED2 is inside directly packaged with, it is direct when bad lamp can occur in main LED1 when being applied to LED display system
Switching backup LED2 carrys out work, can be prevented effectively from the display stain problem that dead light bar is come in LED display system.And should
Photodiode 3 is also encapsulated in LED encapsulation structure, when being applied to LED display system, photodiode 3 can be to main LED1
Luminance detected, backup LED2 cannot be switched to during normal luminous in main LED, so as to ensure that LED display system is each
Individual point can normally show.The working condition of photodiode 3 corresponds to the light and shade of main LED1, so as to according to photodiode 3
It is capable of detecting when there is bad lamp in main LED1, switching standards is provided for LED display system switches to backup LED.This LED encapsulation knots
In structure, one photodiode 3 of a main LED1 correspondence realizes man-to-man detection, and detection efficiency is high.
In specific implementation process, the LED encapsulation structure of this specific embodiment can apply to all-colour LED display system,
Can also be applied to monochromatic LED display system.Accordingly, main LED1 and backup LED2 include RGB respectively in LED encapsulation structure
The LED chip of three kinds of colors or including monochromatic LED chip, after being applied to LED display system, you can form all-colour LED
Display system or monochromatic LED display system.
In specific implementation process, the ground floor of LED encapsulation structure, the second layer and third layer are in longitudinal overlaying structure, i.e.,
Main LED1, backup LED2 and photodiode 3 form overlaying structure in the vertical.It is due to being laminated the structure for adding using three and general
Logical LED is no on width to increase compared to height is only increased, the point from without influence LED display system between LED
Away from.
Embodiment 2
On the basis of embodiment 1, the present invention also provides a kind of LED display system.As shown in Fig. 2 a kind of LED of the invention
Display system specific embodiment includes drive circuit 4 and LED chip 5, also including the control module 6 being connected with drive circuit 4,
LED chip 5 using the LED encapsulation structure described in embodiment 1, drive circuit 4 connect respectively main LED1 in LED encapsulation structure with
Backup LED2, photodiode 3 is connected with control module 6；Drive circuit 4 drives main LED1 to work, and control module 6 is according to photosensitive
Control drive circuit 4 switches to driving backup LED2 work when the real-time current of diode 3 judges that main LED1 is damaged.
In LED display system of the invention, main LED1, backup LED2 and photodiode are encapsulated in each LED chip 5
3, drive circuit 4 can drive the main LED1 can also to drive backup LED2, and photodiode 3 can be in each LED chip 5
The luminance of main LED1 detected, main LED1 cannot normal luminous when by the control of control module 6, make drive circuit
4 are switched to driving backup LED2 work, so that each is put and can normally show to ensure LED display system.Due to each LED chip
Backup LED2, backup LED2 and main LED1 are provided with 5 to be connected with drive circuit 4, are driven when bad lamp occurs in main LED1
Circuit 4 can in time be switched to backup LED2 work, it is ensured that the normal display of LED display system, can be prevented effectively from aobvious in LED
Show the display stain problem that extremely light bar is come in system.
In this specific embodiment using be that the luminance of 3 couples of main LED1 of photodiode is detected, and be one
One photodiode 3 of individual main LED1 correspondences, photodiode 3 can be responded according to the light and shade of main LED1, can be accurate
Detect the luminance of the main LED1 of correspondence such that it is able to be accurately judged to the bad lamp of main LED1, the accuracy rate of detection is high.And
All photodiodes 3 can work simultaneously under the control of control module 6, while being detected to all of main LED1, examine
Survey efficiency high.Also, due to the photodiode 3 for using, with low cost, compact, it is easy to popularization and application.
Additionally, this specific embodiment is monitored using the current status that control module 6 focuses quick diode 3 automatically, and
4 couples of main LED1 of drive circuit are automatically controlled using control module 6 and backup LED2 is switched over, high degree of automation, without special
The equipment and professional knowledge of industry, audient can also be able to be commonly used person for professional person, and Consumer's Experience is good, practical.
In specific implementation process, in order to ensure the uniformity of display effect, when control module 6 judges to have main LED1 to damage
Control drive circuit 4 switches to all backup LED2 work of driving.I.e. in whole LED display system, drive circuit 4 is simultaneously
Drive all main LED1 work or while drive all backup LED2 to work, this causes all masters with display consistency
LED1 and all backup LED2 with display consistency ensure the aobvious of whole LED display system in the state of working at the same time
Show uniformity.Wherein, all main LED1 and all backup LED2 are respective by brightness point by point school in advance in LED display system
Just, this trimming process can be corrected in product export, it is ensured that all main LED1 have uniformity and institute in display
Having backup LED2 has the uniformity in display.And ensure that drive circuit 4 when being switched to all backup LED operations still
The uniformity of the display effect in LED display system is ensure that, user need not carry out the correction of brightness point by point.
In specific implementation process, the LED chip in this specific embodiment is using the LED encapsulation structure described in embodiment 1
After can be attached in PCB substrate, assembled together in conjunction with other electronics such as drive circuit 3, control modules 6 to be formed LED display system
System.
According to the scheme of this specific embodiment, in LED display system after electricity, generally acquiescence drive circuit 4 direct drive is led
LED1 is worked, and the photodiode 3 in each LED chip 5 is detected to the luminance in respective main LED1 chips, such as
The really wafer damage in certain main LED1, the electric current of photodiode 3 can substantially diminish, and user can be by control module 6 pairs
The electric current of the photodiode 3 in LED display system is monitored to judge the damage of main LED1 chips, and control module 6 is certainly
It is dynamic that drive circuit 4 in LED display system is switched to backup LED2, worked by backup LED2.Now control module 6 can be with
Notify that user, user can contact contact staff and the sub- lamp plate that main LED1 is damaged is changed by way of alarm.
In specific implementation process, control module 6 is monitored to the real-time current of photodiode for convenience, a kind of
It is preferred embodiment to set setting one in current comparator, current comparator in control module 6 to be used for and photosensitive two
The current threshold that the real-time current of pole pipe 3 is compared, when control module 6 judges photodiode 3 by current comparator
Real-time current less than setting current threshold, then illustrate there is wafer damage in the corresponding main LED1 of the photodiode 3.
Embodiment 3
On the basis of embodiment 1 and embodiment 2, the present invention also provides a kind of bad lamp detection method.As shown in figure 3, being
A kind of flow chart of bad lamp detection method of the present invention.Referring to Fig. 3, a kind of bad lamp detection method of this specific embodiment is to embodiment
2 LED display system carries out bad lamp inspection survey, in this embodiment, the corresponding main LED of LED chip in LED display system and standby
Part LED includes three kinds of LED chips of color of red green respectively, that is to say, that the main LED chip bag of encapsulation in a LED chip
Three kinds of LED chips of color of red green are included, backup LED also includes three kinds of LED chips of color of red green.Methods described it is specific
Step includes：
The red, green and blue LED chip in LED display system in all main LED is lighted in control module control drive circuit timesharing；
Wherein, described timesharing is lighted and refers to all of RGB chip three in different time sections light LED display system respectively
Chip is planted, in the process, the order of lighting of three kinds of colors of RGB is arbitrary, and control module can preset three kinds of face
Color chip lights order, and user can also modify in follow-up use.
Whether control module up time judges there are main LED bad lamps in LED display system according to the real-time current of photodiode,
The all backup LED operations of direct controlling and driving circuit drives if having；Wherein, as shown in figure 3, assuming to light order for point successively
Azarin light, green glow and blue light, then when feux rouges is lighted, control module determines whether that the red light in main LED shows abnormal, if
Have, be directly switch to backup LED, otherwise then light green glow, control module determines whether that the green light in main LED shows not
Normally, backup LED is directly switch to if having, blue light is otherwise then lighted, control module determines whether the blue lamp in main LED
Display is abnormal, and backup LED is directly switch to if having.
In the bad lamp detection method of this specific embodiment, three kinds of face of RGB are included respectively corresponding to main LED and backup LED
The situation of color LED chip, the present invention controls drive circuit timesharing to light three kinds of colors in all LED by control module first
LED chip, can detect the light and shade of LED chip, therefore control module according to the reality of photodiode due to photodiode
When electric current may determine that in main LED whether there is bad lamp, if having control drive circuit switch over, so as to stop to main LED's
Drive, be directly switch to all backup LED operations of driving.Due to being provided with backup LED and photosensitive two pole in each LED chip
Pipe, photodiode detects to the luminance of main LED, and is one photodiode of a main LED correspondence, photosensitive two
Pole pipe can be responded according to the light and shade of main LED, can accurately detect the luminance of the main LED of correspondence such that it is able to accurate
Really judge the bad lamp of main LED, the accuracy rate of detection is high, main LED and backup LED can be cut in real time after detecting bad lamp
Change, the display stain problem that dead light bar is come in LED display system can be prevented effectively from.And all photodiodes can be same
When work, while detecting that detection efficiency is high to all of main LED.Also, due to the photodiode for using, low cost
It is honest and clean, compact, it is easy to popularization and application.
Additionally, the bad lamp detection method of this specific embodiment focuses the current status of quick diode automatically using control module
It is monitored, and automatically controls drive circuit and main LED and backup LED is switched over, high degree of automation, without setting for specialty
Standby and professional knowledge, audient can also be able to be commonly used person for professional person, and Consumer's Experience is good, practical.
In specific implementation process, in order to be changed to bad lamp in time, this specific embodiment is judging there is master
After LED bad lamps, also bad lamp is positioned.
In due to a LED display system, the quantity of LED is quite huge, using control module to damaged etc. enter
Row positioning alarm can be more complicated, even and if tell that user damages the coordinate of LED, user also is difficult in LED display system
Specific LED is positioned, therefore, this specific embodiment is used to sub- lamp plate as unit is positioned to bad lamp, per height
Lamp plate is divided with PCB substrate in structure, and every sub- lamp plate generally comprises multiple LED chips, is positioned relative to bad lamp, this hair
It is bright relatively easy to the sub- lamp plate positioning where bad lamp.Specifically positioning method is：
The LED encapsulation structure in LED display system is divided in units of sub- lamp plate；
The corresponding main LED of bad lamp is navigated to according to bad lamp position, according to the main LED for navigating to the sub- lamp belonging to it
Plate is positioned.
In a preferred embodiment, as shown in figure 4, positioning when, to the LED of all colours in LED display system
Chip carries out assignment, wherein normal LED chip assignment 1, to bad lamp assignment 0, so as to obtain the value of each main LED：ILamp=IIt is red&
IIt is green&IIt is blue；
Value according to each main LED calculates the state value of sub- lamp plate：ISub- lamp plate=ILamp 1&ILamp 2&ILamp 3……&ILamp n；According to sub- lamp
The corresponding main LED positions of state value positioning bad lamp of plate.It is fixed by reading the state value science and technology of sub- lamp plate during concrete operations
Position to the position where bad lamp, so as to be changed to corresponding sub- lamp plate.Embodiment 4
As different from Example 3, in the corresponding LED display system of bad lamp detection method in this specific embodiment, LED
The corresponding main LED of chip and backup LED include single primary colors LED chip respectively, that is to say, that the master of encapsulation in a LED chip
LED chip only includes single primary colors LED chip, and backup LED also only includes single primary colors LED chip.The specific step of this specific embodiment
Suddenly include：
Control module control drive circuit lights the single primary colors chip in LED display system in all main LED；
Whether control module judges there are main LED bad lamps in LED display system according to the real-time current of photodiode, if having
Then all backup LED operations of direct controlling and driving circuit drives；
In the bad lamp detection method of this specific embodiment, single primary colors LED chip is only included corresponding to main LED and backup LED
Situation, the present invention lights single primary colors LED chip of main LED in all LED by control module control drive circuit first,
Can detect the light and shade of LED chip due to photodiode, therefore control module can be with according to the real-time current of photodiode
Judge whether the single primary colors LED chip in main LED has bad lamp, control drive circuit to switch over if having, so as to stop to master
The driving of LED, is directly switch to all backup LED operations of driving.Due to being provided with backup LED and light in each LED chip
Quick diode, photodiode detects to the luminance of main LED, and is one photodiode of a main LED correspondence,
Photodiode can be responded according to the light and shade of main LED, can accurately detect the luminance of the main LED of correspondence, so that
The bad lamp of main LED can be accurately judged to, the accuracy rate of detection is high, detecting can in real time to main LED and backup LED after bad lamp
Switch over, the display stain problem that dead light bar is come in LED display system can be prevented effectively from.And all photodiodes
Can work simultaneously, while detecting that detection efficiency is high to all of main LED.Also, due to the photodiode for using,
It is with low cost, compact, it is easy to popularization and application.
Additionally, the bad lamp detection method of this specific embodiment focuses the current status of quick diode automatically using control module
It is monitored, and automatically controls drive circuit and main LED and backup LED is switched over, high degree of automation, without setting for specialty
Standby and professional knowledge, audient can also be able to be commonly used person for professional person, and Consumer's Experience is good, practical.
In specific implementation process, in order to be changed to bad lamp in time, this specific embodiment is judging there is master
After LED bad lamps, also bad lamp is positioned.
In due to a LED display system, the quantity of LED is quite huge, using control module to damaged etc. enter
Row positioning alarm can be more complicated, even and if tell that user damages the coordinate of LED, user also is difficult in LED display system
Specific LED is positioned, therefore, this specific embodiment is used to sub- lamp plate as unit is positioned to bad lamp, per height
Lamp plate is divided with PCB substrate in structure, and every sub- lamp plate generally comprises multiple LED chips, is positioned relative to bad lamp, this hair
It is bright relatively easy to the sub- lamp plate positioning where bad lamp.Specifically positioning method is：
The LED encapsulation structure in LED display system is divided in units of sub- lamp plate；
The corresponding main LED of bad lamp is navigated to according to bad lamp position, according to the main LED for navigating to the sub- lamp belonging to it
Plate is positioned.
In a preferred embodiment, as shown in figure 4, positioning when, to the LED of all colours in LED display system
Chip carries out assignment, wherein normal LED chip assignment 1, to bad lamp assignment 0, so as to obtain the value of each main LED：ILamp=
IPrimary colors；
Value according to each main LED calculates the state value of sub- lamp plate：ISub- lamp plate=ILamp 1&ILamp 2&ILamp 3……&ILamp n；According to sub- lamp
The corresponding main LED positions of state value positioning bad lamp of plate.It is fixed by reading the state value science and technology of sub- lamp plate during concrete operations
Position to the position where bad lamp, so as to be changed to corresponding sub- lamp plate.
Relative to embodiment 3, due to only including single primary colors LED chip, control process and detection process phase in each main LED
It is simple for embodiment 3.
The same or analogous part of same or analogous label correspondence；
Position relationship for the explanation of being for illustration only property described in accompanying drawing, it is impossible to be interpreted as the limitation to this patent；
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not right
The restriction of embodiments of the present invention.For those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms.There is no need and unable to be exhaustive to all of implementation method.It is all this
Any modification, equivalent and improvement made within the spirit and principle of invention etc., should be included in the claims in the present invention
Protection domain within.
Claims (10)
1. a kind of LED encapsulation structure, it is characterised in that including being encapsulated in the main LED of ground floor, being encapsulated in the backup of the second layer
LED and the photodiode for being encapsulated in third layer, three-decker are packaged together by integrated circuit technology and are respectively kept with outer
Connect the interface of circuit.
2. LED encapsulation structure according to claim 1, it is characterised in that the main LED and backup LED are respectively including red
The LED chip of green blue three-color or including monochromatic LED chip.
3. LED encapsulation structure according to claim 1, it is characterised in that the ground floor of LED encapsulation structure, the second layer and
Third layer is in longitudinal overlaying structure.
4. a kind of LED display system, including drive circuit and LED chip, it is characterised in that also including being connected with drive circuit
Control module, the LED chip is connected respectively using the LED encapsulation structure described in claim any one of 1-3, drive circuit
Main LED and backup LED in LED encapsulation structure, photodiode are connected with control module；Drive circuit drives main LED operation,
Control module judges to control drive circuit to switch to driving backup LED when main LED is damaged according to the real-time current of photodiode
Work.
5. LED display system according to claim 4, it is characterised in that current comparator is set in the control module,
Setting one is used for the current threshold being compared with the actual current of photodiode in current comparator.
6. LED display system according to claim 4, it is characterised in that control module judges have main LED to be controlled when damaging
Drive circuit switches to all backup LED operations of driving.
7. a kind of bad lamp detection method, it is characterised in that bad lamp inspection survey, institute are carried out to the LED display system described in claim 4
The method of stating includes：
When main LED and backup LED include the LED chip of three kinds of colors of RGB respectively, control module control drive circuit point
When light red, green and blue LED chip in LED display system in all main LED, described timesharing is lighted and referred in different time
Section lights three kinds of chips of all of RGB chip in LED display system respectively；
Whether control module up time judges there are main LED bad lamps in LED display system according to the real-time current of photodiode, if having
Then all backup LED operations of direct controlling and driving circuit drives；
When main LED and backup LED include single primary colors LED chip respectively, control module control drive circuit drives LED displays system
All main LED light single primary colors LED chip in system；
Whether control module judges there are main LED bad lamps in LED display system according to the real-time current of photodiode, straight if having
Connect control drive circuit and drive all backup LED operations.
8. bad lamp detection method according to claim 7, it is characterised in that after judging to have main LED bad lamps, also to bad
Lamp is positioned.
9. bad lamp detection method according to claim 8, it is characterised in that specific positioning method is：
The LED encapsulation structure in LED display system is divided in units of sub- lamp plate；
The corresponding main LED of bad lamp is navigated to according to bad lamp position, the sub- lamp plate belonging to it is entered according to the main LED for navigating to
Row positioning.
10. bad lamp detection method according to claim 9, it is characterised in that during positioning, by normal LED chip assignment
1, to bad lamp assignment 0, so as to obtain the value of each main LED：ILamp=IIt is red&IIt is green&IIt is blueOr ILamp=IPrimary colors；
Value according to each main LED calculates the state value of sub- lamp plate：ISub- lamp plate=ILamp 1&ILamp 2&ILamp 3……&ILamp n；According to sub- lamp plate
The corresponding main LED positions of state value positioning bad lamp.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104936341A (en) * | 2015-06-01 | 2015-09-23 | 安徽星烁科技有限公司 | Graphical LED device with backup restoration function |
| CN104952377A (en) * | 2015-07-08 | 2015-09-30 | 王晓光 | Sign capable of realizing active light emission and intelligent repair as well as control method and applications of sign |
| DE102016105989A1 (en) * | 2016-04-01 | 2017-10-05 | Osram Opto Semiconductors Gmbh | Light emitting module |
| CN109212437B (en) * | 2018-09-07 | 2020-06-23 | 南京牧镭激光科技有限公司 | Multi-color lamp testing method and testing equipment |
| KR20200037628A (en) * | 2018-10-01 | 2020-04-09 | 삼성전자주식회사 | Display apparatus and manufacturing method for the same |
| KR102657536B1 (en) * | 2018-10-24 | 2024-04-12 | 엘지디스플레이 주식회사 | Display panel and method of deactivating light emitting diode in display panel |
| TWI708234B (en) * | 2018-12-25 | 2020-10-21 | 友達光電股份有限公司 | Display device and driving method thereof |
| CN111063310A (en) * | 2020-01-07 | 2020-04-24 | 业成科技（成都）有限公司 | Display and brightness adjusting method thereof |
| CN112614863A (en) * | 2020-12-15 | 2021-04-06 | 苏州芯聚半导体有限公司 | Micro light-emitting diode display panel, dead pixel repairing method and display |
| CN112562556B (en) * | 2020-12-22 | 2022-08-02 | 北京市轨道交通运营管理有限公司 | Ceiling guide display board and testing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102750896A (en) * | 2012-06-25 | 2012-10-24 | 西安诺瓦电子科技有限公司 | LED (light-emitting diode) display screen status detection device and detection method |
| CN103017026A (en) * | 2012-11-29 | 2013-04-03 | 杨夏芳 | LED shadowless lamp system with failure detection and repair functions |
| CN203606463U (en) * | 2013-11-19 | 2014-05-21 | 上海博泰悦臻电子设备制造有限公司 | Automatic detection device for LED array |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004209778A (en) * | 2002-12-27 | 2004-07-29 | Seiko Epson Corp | Line head and image formation device using it |
| BRPI0409513A (en) * | 2003-04-25 | 2006-04-18 | Visioneered Image Systems Inc | led area light source for emitting light of a desired color, color video monitor and methods of determining the degradation of the representative led (s) of each color and of operating and calibrating the monitor |
-
2014
- 2014-10-30 CN CN201410606083.9A patent/CN104409453B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102750896A (en) * | 2012-06-25 | 2012-10-24 | 西安诺瓦电子科技有限公司 | LED (light-emitting diode) display screen status detection device and detection method |
| CN103017026A (en) * | 2012-11-29 | 2013-04-03 | 杨夏芳 | LED shadowless lamp system with failure detection and repair functions |
| CN203606463U (en) * | 2013-11-19 | 2014-05-21 | 上海博泰悦臻电子设备制造有限公司 | Automatic detection device for LED array |
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