CN2886737Y - LED display module - Google Patents
LED display module Download PDFInfo
- Publication number
- CN2886737Y CN2886737Y CN 200620114314 CN200620114314U CN2886737Y CN 2886737 Y CN2886737 Y CN 2886737Y CN 200620114314 CN200620114314 CN 200620114314 CN 200620114314 U CN200620114314 U CN 200620114314U CN 2886737 Y CN2886737 Y CN 2886737Y
- Authority
- CN
- China
- Prior art keywords
- light
- emitting diode
- electrostatic discharge
- pcb
- circuit board
- 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.)
- Expired - Fee Related
Links
- 239000002184 metal Substances 0.000 claims abstract description 19
- 239000003292 glue Substances 0.000 claims abstract description 8
- 230000001681 protective effect Effects 0.000 claims description 18
- 230000000087 stabilizing effect Effects 0.000 claims description 12
- 230000001052 transient effect Effects 0.000 claims description 6
- 239000004033 plastic Substances 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 239000004065 semiconductor Substances 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000002441 reversible effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Landscapes
- Led Device Packages (AREA)
Abstract
A luminescent diode display module provided in the electrostatic protection circuit comprises a casing, a printed board, a plurality of luminescent diode chips, an electrostatic protection circuit and a metal pin. The luminescent diode chips are fixed on the printed board, which is provided with the metal pin that is characterized in that the printed board is fixed the electrostatic protection, and the printed circuit is packed with the casing through glue. The casing is made of plastic material and is provided with a light-penetrated window. The electrostatic is made up of one or several semiconductor chips.
Description
Technical field
The utility model relates to a kind of light-emitting diode display module of built-in electrostatic discharge protective circuit.
Background technology
The structure of present known light-emitting diode display module is made up of a plastic casing, printed circuit board (PCB), many light-emitting diode chip for backlight unit and metal pins.Light-emitting diode chip for backlight unit by conducting resinl or insulating gel lead fixed on printed circuit board (PCB), and link to each other with circuit board by metal lead wire, simultaneously, be fixed with several metal pins on printed circuit board (PCB), printed circuit board (PCB) and shell that many light-emitting diode chip for backlight unit and metal pins are housed are packaged together by glue (as epoxy resin).
Known this light-emitting diode display module has advantage of simple structure at present, but also exists some shortcomings.Because the appearance of the chip of the blueness of high brightness and green, make the usable range of light-emitting diode display module widen greatly, but, some antistatic properties blue and green chip are relatively poor, the antistatic voltage of segment chip only has 300V-500V (measuring according to the HBM pattern), belong to the highstrung device of static, at present, the light-emitting diode (LED) module that adopts the said chip encapsulation to form, in use, antistatic countermeasure must be very perfect, and carelessness is arranged slightly, just can cause its interior section chip to damage.
Summary of the invention
In order to overcome the deficiency of existing light-emitting diode display module aspect antistatic, the utility model provides a kind of light-emitting diode display module, the antistatic property of this light-emitting diode display module is greatly improved, thereby improved the reliability of device, reduced the rejection rate in the production use.
The technical scheme that its technical matters that solves the utility model adopts is: a kind of light-emitting diode display module; by a plastic casing; printed circuit board (PCB); the light-emitting diode chip for backlight unit array; metal pins and electrostatic discharge protective circuit are formed; light-emitting diode chip for backlight unit by glue or lead fixed on a face of printed circuit board (PCB); on printed circuit board (PCB), be fixed with a plurality of metal pins; at circuit board electrostatic discharge protective circuit is housed simultaneously; this electrostatic discharge protective circuit can be made up of multi-disc semi-conductor chip (as voltage stabilizing diode), and light-emitting diode chip for backlight unit is housed; the printed circuit board (PCB) of electrostatic discharge protective circuit and metal pins and shell are packaged together by glue becomes a complete light-emitting diode display module.
The beneficial effects of the utility model are, when using this light-emitting diode display module, are not vulnerable to the damage of static, and good reliability is used simply, has reduced the rejection rate in the production run, has reduced production cost, has improved reliability.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is a structural section of the present utility model.
Fig. 2 is a kind of 8 * 8 light-emitting diode display module embodiment 1 circuit structure block diagram.
Fig. 3 is a kind of 8 * 8 light-emitting diode display module embodiment 2 circuit structure block diagrams.
Fig. 4 is the top view of a kind of 8 * 8 light-emitting diode display module embodiment.
1. housings among the figure, 2. light-emitting diode chip for backlight unit, 3. printed circuit board (PCB), 4. electrostatic discharge protective circuit, 5. metal pins.
Embodiment
Figure 1 shows that the sectional view of the light-emitting diode display module of whole built-in control circuit.On a face of printed circuit board (PCB) (3); be fixed with light-emitting diode chip for backlight unit (2) array; light-emitting diode chip for backlight unit (2) links to each other with printed circuit board (PCB) (3) by conducting resinl or lead; on printed circuit board (PCB) (3), be fixed with electrostatic discharge protective circuit (4); electrostatic discharge protective circuit (4) is formed for the multi-disc voltage stabilizing diode; many metal pins (5) are housed on printed circuit board (PCB) (3) simultaneously; external circuit is equipped with light-emitting diode chip for backlight unit (2) by metal pins (5) driven for emitting lights diode chip for backlight unit (2) array light-emitting; the printed circuit board (PCB) (3) and the shell (1) of electrostatic discharge protective circuit (4) and metal pins (5) are packaged together by glue.
Fig. 2 is the schematic block circuit diagram of a kind of 8 * 8 light-emitting diode display module embodiment.64 light-emitting diode chip for backlight unit (2) are formed one 8 * 8 array; electrostatic discharge protective circuit is made up of 16 voltage stabilizing diodes (D65-D80); (ROW1-ROW8's 16 pins of one end and display module COL1-COL8) is connected, and the other end all links together.When exterior static voltage is applied to any two pins of display module, if impressed voltage is reverse for light emitting diode, two clamping circuits that stabilivolt is formed by corresponding pin, its forward voltage is lower than the breakdown reverse voltage of light emitting diode, therefore, the discharge current that external static electrification causes constitutes the loop by clamping circuit, thereby has protected light-emitting diode chip for backlight unit owing to suffer too high voltages to cause oppositely big electric current to puncture; If impressed voltage is a forward for light emitting diode; the clamping circuit of forming by two stabilivolts; but the discharge current of restricted passage light emitting diode; when the electric current that flows through when the light emitting diode transient state causes the clamp voltage of the clamping circuit that its forward voltage drop forms greater than two stabilivolts; extra electric current constitutes the loop by clamping circuit, thereby has protected light-emitting diode chip for backlight unit because the damage that caused by excessive current.Voltage stabilizing diode among Fig. 2 also can be replaced with other have similar defencive function during, as Transient Suppression Diode etc.Simultaneously, when the voltage stabilizing diode among the figure connects, can be that all positive poles link together, negative pole connects the corresponding metal pin respectively, also can be that all negative poles link together, and positive pole connects the corresponding metal pin figure respectively.
Fig. 3 adopts a kind of switching diode and voltage stabilizing diode to form the schematic block circuit diagram of 8 * 8 the light-emitting diode display module embodiment on protection point road.64 light-emitting diode chip for backlight unit (2) are formed one 8 * 8 array, electrostatic discharge protective circuit is made up of 16 switch diode D65-D80 and a voltage stabilizing diode (D81), when exterior static voltage is applied to any two pins of display module, if impressed voltage is reverse for certain light emitting diode, the clamping circuit of forming by two switching diodes and a voltage stabilizing diode (D81) of respective pin, its forward voltage is lower than the breakdown reverse voltage of light emitting diode, therefore, the discharge current that external static electrification causes constitutes the loop by clamping circuit, thereby has protected light-emitting diode chip for backlight unit owing to suffer too high voltages to cause oppositely big electric current to puncture; If impressed voltage is a forward for light emitting diode; the clamping circuit of forming by two switching diodes and a voltage stabilizing diode (D81) of respective pin; but the discharge current of restricted passage light emitting diode; when the electric current that flows through when the light emitting diode transient state causes its forward voltage drop greater than clamp voltage; extra electric current constitutes the loop by clamping circuit, thereby has protected light-emitting diode chip for backlight unit because the damage that caused by excessive current.Voltage stabilizing diode among the figure (D81) can be replaced with the device with similar functions, as Transient Suppression Diode etc.
Fig. 4 is the top view of a kind of 8 * 8 light-emitting diode display module embodiment.64 display windows of evenly arranging on the shell (1).Because the glue that encapsulation is adopted is transparent or semitransparent material, so the light that light-emitting diode chip for backlight unit (2) array sends can penetrate the formation light emitting array from display window.
Fig. 1-the 4th, some typical embodiments can become double-colored or the colour light-emitting diode display module by the LED chip that increases different colours in addition.Display format can be the pattern of lattice module, also can be the form of number or symbol, if latticed form, the scale of dot matrix also is not limited to 8 * 8, can form the light-emitting diode display module of all sizes such as 5 * 8,5 * 7 or 16 * 16.Display window also is not limited to circle, can be different shapes such as square or ellipse.Used electrostatic protection device can be fixed on the printed circuit board (PCB) with glue directly with the form of chip, links to each other with wiring board with metal lead wire or conducting resinl, and also can be packaged device, be fixed on the printed circuit board (PCB) with the method for welding.
Claims (5)
1. light-emitting diode display module; form by shell, printed circuit board (PCB), many light-emitting diode chip for backlight unit, electrostatic discharge protective circuit and metal pins; light-emitting diode chip for backlight unit is fixed on the printed circuit board (PCB); metal pins is housed on printed circuit board (PCB); be fixed with many light-emitting diode chip for backlight unit; it is characterized in that being fixed with electrostatic discharge protective circuit on printed circuit board (PCB), the printed circuit board (PCB) and the shell that are fixed with electrostatic discharge protective circuit and Duo Zhi light-emitting diode chip for backlight unit and metal pins are packaged together by glue.
2. light-emitting diode (LED) module according to claim 1 is characterized in that: electrostatic discharge protective circuit is made up of two or two above voltage stabilizing diodes.
3. light-emitting diode (LED) module according to claim 1 is characterized in that: electrostatic discharge protective circuit is made up of two or two above switching diodes and one or an above voltage stabilizing diode.
4. light-emitting diode (LED) module according to claim 1 is characterized in that: electrostatic discharge protective circuit suppresses diodes by the above transient voltages of two or two and forms.
5. light-emitting diode (LED) module according to claim 1 is characterized in that: electrostatic discharge protective circuit suppresses diode by two or two above switching diodes and one or an above transient voltage and forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620114314 CN2886737Y (en) | 2006-04-24 | 2006-04-24 | LED display module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620114314 CN2886737Y (en) | 2006-04-24 | 2006-04-24 | LED display module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2886737Y true CN2886737Y (en) | 2007-04-04 |
Family
ID=37961825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620114314 Expired - Fee Related CN2886737Y (en) | 2006-04-24 | 2006-04-24 | LED display module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2886737Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013219A (en) * | 2010-12-29 | 2011-04-13 | 利亚德光电股份有限公司 | Led display board and led display |
| CN102013218A (en) * | 2010-12-29 | 2011-04-13 | 利亚德光电股份有限公司 | Led display board and led display |
| WO2016114909A1 (en) * | 2015-01-16 | 2016-07-21 | Apple Inc. | Electro-static discharge and electric overstress protection strategy for micro-chip array on panel |
| CN107784944A (en) * | 2017-11-22 | 2018-03-09 | 田国辉 | A kind of printing opacity light-mixing structure processing of LED display display effect |
| EP3281228A4 (en) * | 2015-03-30 | 2018-11-14 | Boe Technology Group Co. Ltd. | Oled array substrate, display apparatus containing the same, and method for forming the same |
-
2006
- 2006-04-24 CN CN 200620114314 patent/CN2886737Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013219A (en) * | 2010-12-29 | 2011-04-13 | 利亚德光电股份有限公司 | Led display board and led display |
| CN102013218A (en) * | 2010-12-29 | 2011-04-13 | 利亚德光电股份有限公司 | Led display board and led display |
| CN102013218B (en) * | 2010-12-29 | 2013-07-10 | 利亚德光电股份有限公司 | Led display board and led display |
| WO2016114909A1 (en) * | 2015-01-16 | 2016-07-21 | Apple Inc. | Electro-static discharge and electric overstress protection strategy for micro-chip array on panel |
| US9966000B2 (en) | 2015-01-16 | 2018-05-08 | Apple Inc. | Electro-static discharge and electric overstress protection strategy for micro-chip array on panel |
| EP3281228A4 (en) * | 2015-03-30 | 2018-11-14 | Boe Technology Group Co. Ltd. | Oled array substrate, display apparatus containing the same, and method for forming the same |
| CN107784944A (en) * | 2017-11-22 | 2018-03-09 | 田国辉 | A kind of printing opacity light-mixing structure processing of LED display display effect |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106847801B (en) | A surface-mounted RGB-LED packaging module and its manufacturing method | |
| US9966367B2 (en) | Light emitting device | |
| US20110096045A1 (en) | Display apparatus | |
| US20070194422A1 (en) | Light emitting diode package and fabricating method thereof | |
| TW200411956A (en) | LED assembly | |
| CN101814259A (en) | LED display system | |
| CN2886737Y (en) | LED display module | |
| CN203659368U (en) | Led display screen | |
| JP2011525702A (en) | Light emitting device package | |
| CN208622352U (en) | A kind of LED display unit group and display panel | |
| CN113944893A (en) | Module of LED lamp with at least three wires | |
| CN206340544U (en) | A kind of surface-adhered type RGB LED encapsulation modules | |
| CN101551962A (en) | Full-color LED display device | |
| CN2606943Y (en) | Light-emitting diode dot matrix display module | |
| CN203165419U (en) | Full-color transparent LED display screen | |
| CN201584409U (en) | Light-emitting diode chip carrier structure | |
| CN201402572Y (en) | All-color LED display device | |
| KR100809225B1 (en) | LED module | |
| KR101744970B1 (en) | Light emitting module and light unit using the same | |
| CN201655199U (en) | Led display screen | |
| CN206148470U (en) | LED luminescence unit, display module assembly and display screen | |
| CN220963345U (en) | LED display screen | |
| CN204391158U (en) | A kind of lead frame and use the light-emitting diode of this lead frame | |
| KR102217631B1 (en) | Light emitting diode chip, light emitting diode package, and display device | |
| CN201462698U (en) | Improved cap structure of LED lamp tube |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070404 Termination date: 20120424 |