CN200986786Y - LED display screen module with external pixel spacing 16-20mm earth wire - Google Patents
LED display screen module with external pixel spacing 16-20mm earth wire Download PDFInfo
- Publication number
- CN200986786Y CN200986786Y CN 200620017935 CN200620017935U CN200986786Y CN 200986786 Y CN200986786 Y CN 200986786Y CN 200620017935 CN200620017935 CN 200620017935 CN 200620017935 U CN200620017935 U CN 200620017935U CN 200986786 Y CN200986786 Y CN 200986786Y
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- circuit board
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- sided printed
- led display
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Abstract
The utility model provides a LED display module with pixel pitch of 16-20mm. The grounding terminal of a constant current driver IC and the grounding terminal of an R-EXT external resistance are directly welded with an external grounding conductor plug through a short-distance copper lead printed on a circuit board. The technic proposal eliminates the uneven display brightness caused by grounding potential difference and simplifies the module structure into a single double-sided printing circuit board, thus reducing the cost.
Description
Technical field:
The utility model relates to the LED display module of a kind of pel spacing 16-20mm, especially a kind of ground wire external LED display module, and its technical scheme can be applicable to LED display and makes the field.
Technical background
The pel spacing that existing domestic many companies produce is that the LED display module of 16-20mm comprises light emitting diode matrix, constant-current driving integrated circuit, R-EXT end outer meeting resistance, auxiliary circuit element, printed circuit board (PCB) and shell.Wherein the auxiliary circuit element is meant signal transmitting and receiving drive integrated circult, resistance, electric capacity and plug connector.
The modular structure form has two kinds: first kind is two double-sided printed-circuit board structures, and promptly all electronic components of module divide two double-sided printed-circuit boards to install: light emitting diode matrix is installed on the double-sided printed-circuit board; Constant-current driving integrated circuit and auxiliary circuit element are installed on another piece double-sided printed-circuit board, and two double-sided printed-circuit boards are linked to each other by the contact pin socket.Its drawback is a complex structure, and cost is higher.Second kind is monolithic four layer printed circuit plate structures, all electronic components that are module all are installed on one four layer printed circuit board: light emitting diode matrix is installed in the bottom of four layer printed circuit boards, constant-current driving integrated circuit, R-EXT end outer meeting resistance and auxiliary circuit element are installed in the top layer of four layer printed circuit boards, two-layer bus plane and the ground plane of being respectively in the middle of other has.Simple than first kind of structure compared, but its cost is still higher.
Existing pel spacing is that the LED display modular circuit of 16-20mm adopts the constant-current driving integrated circuit of multiple models such as MBI5026, DM136, TB62726 to come the driving LED light emitting diode matrix more.The output stage of this adhesive integrated circuit is a constant-current source circuit, and the size of its output current is determined by the outer meeting resistance resistance of this integrated circuit R-EXT end.
R-EXT holds function: Input terminal used to connect an external resistor for setting upoutput current for all output channels. selects from Macroblock company's site
Www.mblock.com.twTechnical information.
The pel spacing that existing domestic many companies produce is the display screen module of 16-20mm, the brightness of display screen uneven phenomenon that existence is caused by the ground wire potential difference (PD), its reason is: tens constant-current driving integrated circuit are housed on the display screen module printed circuit board (PCB), the ground wire total current is about 10 amperes, and printed circuit board ground Copper Foil sectional area is limited, make the earth terminal of multi-disc constant-current driving integrated circuit, R-EXT end outer meeting resistance earth point produces different potential difference (PD) with the common ground output point, thereby make the output current of multi-disc constant-current driving integrated circuit produce difference, this just causes entire display screen brightness to produce well-regulated block uneven phenomenon, i.e. mosaic phenomenon.Although the layman is difficult to discover, the brightness of display screen coincident indicator descends thus.
Summary of the invention
For overcome display screen modular structure complexity that pel spacing that existing domestic many companies produce is 16-20mm, cost is higher and exist and cause the brightness disproportionation phenomenon by the ground wire potential difference (PD).
The technical scheme that the utility model adopted is:
Pel spacing 16-20mm ground wire external LED display module, wherein: the double-sided printed-circuit board and the light emitting diode matrix, constant-current driving integrated circuit, R-EXT end outer meeting resistance, the auxiliary circuit element that are plugged on the double-sided printed-circuit board that comprise an external gnd conductor; Double-sided printed-circuit board, light emitting diode matrix, constant-current driving integrated circuit, R-EXT end outer meeting resistance, auxiliary circuit element are arranged in the shell.
Pel spacing 16-20mm ground wire external LED display module, wherein: the constant-current driving integrated circuit earth terminal on the double-sided printed-circuit board, the short distance Copper Foil lead-in wire of R-EXT end outer meeting resistance earth point on printed circuit board (PCB) directly are weldingly connected with the pin of external gnd conductor.
Pel spacing 16-20mm ground wire external LED display module, wherein: light emitting diode matrix is installed in the bottom of double-sided printed-circuit board, and constant-current driving integrated circuit, R-EXT end outer meeting resistance and auxiliary circuit element are installed in the top layer of double-sided printed-circuit board.
Be on second kind of architecture basics of LED display module of 16-20mm at existing pel spacing, cancel ground plane and cathode power supply layer in four layer printed circuit boards, make it be reduced to double-sided printed-circuit board, the cathode power supply layer is substituted by the copper layer that covers of double-sided printed-circuit board top layer and bottom.
The conductor of external enough sectional areas is made ground wire on the double-sided printed-circuit board after the simplification, substitutes the ground wire Copper Foil that is difficult to bearing great current in the printed circuit board (PCB).The earth terminal of constant-current driving integrated circuit, R-EXT end outer meeting resistance earth point directly are weldingly connected with external gnd conductor pin through short distance Copper Foil lead-in wire.
The beneficial effects of the utility model are:
1: all electronic components of display screen module are installed on the double-sided printed-circuit board, make the display screen module become monolithic double-sided printed-circuit board structure, reduce cost.
2: eliminate the brightness of display screen uneven phenomenon that is caused by the ground wire potential difference (PD).
Description of drawings
Fig. 1 is a printed circuit board (PCB) top layer floor plan of the present utility model, is the upward view of Fig. 2.
Fig. 2 is the utility model cross section structure synoptic diagram.
Fig. 3 is a printed circuit board (PCB) bottom floor plan of the present utility model, is the vertical view of Fig. 2.
Fig. 4 is the A-A cross-section structure enlarged drawing of Fig. 1.
Description of drawings 1: light emitting diode matrix 2: constant-current driving integrated circuit 3: auxiliary circuit element 4:R-EXT holds outer meeting resistance 5: double-sided printed-circuit board 6: external gnd conductor 7: common ground output point 8: shell.
Embodiment
Embodiment 1
Pel spacing 16-20mm ground wire external LED display module, wherein: comprise the double-sided printed-circuit board (5) of an external gnd conductor (6) and be plugged on light emitting diode matrix (1) on the double-sided printed-circuit board (5), constant-current driving integrated circuit (2), R-EXT end outer meeting resistance (4), auxiliary circuit element (3); Double-sided printed-circuit board (5), light emitting diode matrix (1), constant-current driving integrated circuit (2), R-EXT end outer meeting resistance (4), auxiliary circuit element (3) are arranged in the shell (8).
Pel spacing 16-20mm ground wire external LED display module, wherein: constant-current driving integrated circuit (2) earth terminal on the double-sided printed-circuit board (5), the short distance Copper Foil lead-in wire of R-EXT end outer meeting resistance (4) earth point on printed circuit board (PCB) (5) directly are weldingly connected with the pin of external gnd conductor (6).
Pel spacing 16-20mm ground wire external LED display module, wherein: light emitting diode matrix (1) is installed in the bottom of double-sided printed-circuit board (5), and constant-current driving integrated circuit (2), R-EXT end outer meeting resistance (4) and auxiliary circuit element (3) are installed in the top layer of double-sided printed-circuit board (5).
In Fig. 1, constant-current driving integrated circuit (2) and R-EXT end outer meeting resistance (4) divide uplink and downlink to be arranged in double-sided printed-circuit board (5) top layer; In Fig. 3, two sectional areas bent to shape as shown in Figure 3 greater than 1 square millimeter gnd conductor (6) about double-sided printed-circuit board (5) bottom was external, and the mid point of two external gnd conductors (6) links to each other with common ground output point (7).
In Fig. 4, the earth terminal of constant-current driving integrated circuit (2), R-EXT end outer meeting resistance (4) earth point directly is weldingly connected through the pin of short distance Copper Foil lead-in wire with external gnd conductor (6).External gnd conductor can be made with multiple mode: a. can be stamped to form with copper sheet; B. can weld a plurality of pins with circular copper wire forms; C. can be spliced with the multistage lead; D: available scolding tin is piled up with lead and is formed by connecting.
In Fig. 2, the bottom of double-sided printed-circuit board (5) is installed external gnd conductor (6) and light emitting diode matrix (1); Top layer is installed constant-current driving integrated circuit (2), R-EXT end outer meeting resistance (4) and auxiliary circuit element (3).
Double-sided printed-circuit board (5) is to simplify to form on second kind of structure-monolithic of existing display screen module, four layer printed circuit board architecture basics: ground plane and the cathode power supply layer of cancelling four layer printed circuit boards, the cathode power supply layer is substituted by the copper layer that covers of double-sided printed-circuit board (5) top layer and bottom, and the ground plane of bearing great current is substituted by external gnd conductor.
External gnd conductor (6) is installed on double-sided printed-circuit board (5) top layer, and all the other are with embodiment 1.
External gnd conductor (6) is alternately installed at the top layer and the bottom of double-sided printed-circuit board (5), and all the other are with embodiment 1.
Claims (3)
1, pel spacing 16-20mm ground wire external LED display module is characterized in that: comprise the double-sided printed-circuit board (5) of an external gnd conductor (6) and be plugged on light emitting diode matrix (1) on the double-sided printed-circuit board (5), constant-current driving integrated circuit (2), R-EXT end outer meeting resistance (4), auxiliary circuit element (3); Double-sided printed-circuit board (5), light emitting diode matrix (1), constant-current driving integrated circuit (2), R-EXT end outer meeting resistance (4), auxiliary circuit element (3) are arranged in the shell (8).
2, pel spacing 16-20mm ground wire external LED display module according to claim 1 is characterized in that: constant-current driving integrated circuit (2) earth terminal on the double-sided printed-circuit board (5), the short distance Copper Foil lead-in wire of R-EXT end outer meeting resistance (4) earth point on printed circuit board (PCB) (5) directly are weldingly connected with the pin of external gnd conductor (6).
3, pel spacing 16-20mm ground wire external LED display module according to claim 1, it is characterized in that: light emitting diode matrix (1) is installed in the bottom of double-sided printed-circuit board (5), and constant-current driving integrated circuit (2), R-EXT end outer meeting resistance (4) and auxiliary circuit element (3) are installed in the top layer of double-sided printed-circuit board (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620017935 CN200986786Y (en) | 2006-08-28 | 2006-08-28 | LED display screen module with external pixel spacing 16-20mm earth wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620017935 CN200986786Y (en) | 2006-08-28 | 2006-08-28 | LED display screen module with external pixel spacing 16-20mm earth wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200986786Y true CN200986786Y (en) | 2007-12-05 |
Family
ID=38916245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620017935 Expired - Fee Related CN200986786Y (en) | 2006-08-28 | 2006-08-28 | LED display screen module with external pixel spacing 16-20mm earth wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200986786Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101901570A (en) * | 2010-08-11 | 2010-12-01 | 福建泰德光电科技有限公司 | LED display screen module |
| 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 |
| CN102024389A (en) * | 2010-12-29 | 2011-04-20 | 利亚德光电股份有限公司 | LED display panel and LED display |
-
2006
- 2006-08-28 CN CN 200620017935 patent/CN200986786Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101901570A (en) * | 2010-08-11 | 2010-12-01 | 福建泰德光电科技有限公司 | LED display screen module |
| 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 |
| CN102024389A (en) * | 2010-12-29 | 2011-04-20 | 利亚德光电股份有限公司 | LED display panel 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 |
| CN102024389B (en) * | 2010-12-29 | 2014-08-27 | 利亚德光电股份有限公司 | LED display panel and LED display |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Cao Zhimian Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: Cao Zhimian Document name: Notification to Pay the Fees |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071205 Termination date: 20120828 |