CN2814454Y - Liquid crystal display device with double-screen - Google Patents
Liquid crystal display device with double-screen Download PDFInfo
- Publication number
- CN2814454Y CN2814454Y CN 200520035156 CN200520035156U CN2814454Y CN 2814454 Y CN2814454 Y CN 2814454Y CN 200520035156 CN200520035156 CN 200520035156 CN 200520035156 U CN200520035156 U CN 200520035156U CN 2814454 Y CN2814454 Y CN 2814454Y
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- China
- Prior art keywords
- circuit board
- screen
- lcd
- main
- flexible circuit
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Abstract
The utility model discloses a kind of LCD with double screen, comprise main screen, the secondary main circuit board that shields and carry the control circuit of two screens of control, also comprise a flexible circuit board, described main screen and secondary screen directly are connected respectively on this flexible circuit board, and described flexible circuit board also is connected with main circuit board by interface.The utility model has been saved the die sinking expense of FPC, has reduced cost, has reduced crimping and welding sequence, has reduced production cost.And, can realize controlling main screen and secondary screen respectively with two different IC by the cabling on the FPC.
Description
[technical field]
The utility model relates to a kind of LCD, relates in particular to a kind of LCD with main screen and secondary screen.
[background technology]
Convenient and energy-conservation in order to watch, some equipment (for example mobile phone, PDA etc.) has two LCDs, and one is called main screen, and size is bigger, and display pixel is many, is generally colored and shows; Another is called secondary screen, and size is bigger, and display pixel is few, is not colored the demonstration usually.Two display screens connect by other elements, and at present, main screen mainly is that following dual mode is arranged with the method that secondary screen is connected:
Mode one: main screen LCD and secondary screen LCD control by drive IC separately respectively, then by separately FPC and pcb board 4 (printed circuit board, printed-wiring board (PWB)) connects, thereby reach the purpose of connecting of main screen LCD and secondary screen LCD, make the LCD main circuit board can control main screen and secondary screen, structure such as accompanying drawing 1,2 simultaneously simultaneously.The FPC (flexible circuit board) of main screen LCD is burn-on in the one side of pcb board 4, the FPC that then pair is shielded LCD burn-ons at pcb board 4 another sides, giving electrical property by circuit on the pcb board 4 connects, reliable for connecting, general PCB selects the glass PCB of 0.5MM left and right thickness for use, has so just realized that main screen LCD shields being connected and control of LCD with pair.
But there is following shortcoming in said method: 1) main screen LCD and secondary screen LCD must open two cover FPC moulds and a cover PCB mould respectively, and cost is very high; 2) main screen LCD needs welding FPC earlier, secondary screen LCD also needs welding FPC earlier, two FPC need again to be welded on the pcb board respectively, therefore need overlay or weld four times, just need more times to weld if pcb board also needs to link to each other with main circuit board by another FPC, the number of times of welding be many more, what cause is bad many more, be prone to the poor short circuit that causes of welding in the production and open circuit is bad, increase production cost, reduce production efficiency.
Mode two: main screen LCD and secondary screen LCD control by a drive IC, are connected by a slice COF 5 (chip on film) between two LCD, are connected structure such as accompanying drawing 3 by a slice master FPC 6 with the display main circuit board by the weld 61 on it again:
But also there is following shortcoming in above-mentioned method of attachment: 1) can only control this two LCD with same IC, on the use drive IC certain restriction be arranged; 2) need open a cover FPC mould and a cover COF mould, cost height; 3) FPC and COF need to overlay with glass, so just need do and overlay or weld for three times (COF respectively with the overlaying of main screen and secondary screen, FPC and main screen overlay the welding of FPC and main circuit board), technological requirement increases, and needs PCB to increase the expansion circuit sometimes.
[summary of the invention]
Fundamental purpose of the present utility model is exactly in order to solve problems of the prior art, and a kind of reflection type color liquid crystal display simple, simple in structure, that reflecting brightness is high of making is provided.
For achieving the above object, the LCD that the utility model proposes with double screen, comprise main screen, the secondary main circuit board that shields and carry the control circuit of two screens of control, also comprise a flexible circuit board, described main screen and secondary screen directly are connected respectively on this flexible circuit board, and described flexible circuit board also is connected with main circuit board by its interface.
Preferred version is: described main screen and secondary screen are bonded on the corresponding golden finger of flexible circuit board by ACF (anisotropic conducting film).
The beneficial effects of the utility model are: 1) saved main screen LCD FPC, secondary screen LCD has reduced cost with FPC die sinking expense.2) shield hot pressing on same FPC owing to two, so need twice crimping, this FPC also only need do once welding with being connected of main circuit board, thereby has reduced crimping and welding sequence, has reduced the probability of defective generation, has reduced production cost.And FPC can fully be connected with main circuit board, and also prolonged serviceable life, is particularly useful for the demand of ultra-thin module.3) by the cabling on the FPC, can realize controlling main screen and secondary screen respectively with two different IC, relatively flexibly, and its structure also can be adjusted flexibly.
Feature of the present utility model and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.
[description of drawings]
Fig. 1 is the front view (FV) of a kind of structure that main screen is connected with secondary screen in the prior art;
Fig. 2 is the back view of a kind of structure that main screen is connected with secondary screen in the prior art;
Fig. 3 is the another kind of structural drawing that main screen is connected with secondary screen in the prior art;
Fig. 4 is the structural representation that main screen of the present utility model is connected with secondary screen;
Fig. 5 is the outboard profile of the FPC among Fig. 4.
[embodiment]
Shown in Fig. 4,5, main screen and secondary screen directly are connected respectively on the same flexible circuit board (FPC), design has two row's golden fingers 31,32 on the flexible circuit board 3, main screen 1 is bonded in by ACF on the main screen golden finger 31 of flexible circuit board, and secondary screen 2 is bonded on the pair screen golden finger 32 of flexible circuit board by ACF.Also designing on the flexible circuit board 3 has interface 34, and flexible circuit board 3 is connected with the main circuit board (not shown) by interface 34.Also can further be pasted with SMT (surface mounting technology) element 33 on the flexible circuit board 3.
During making, at first on the shared flexible circuit board 3 of main screen and secondary screen, adopt surface mounting technology, LED for example, electric capacity, SMT elements such as resistance at its surface mount SMT element.If need be at the element pasted on surface of flexible circuit board 3, then this step can be omitted.Between the main screen golden finger 31 of the junction of main screen LCD and flexible circuit board 3, ACF is set then,, is electrically connected thereby reach by the crimping of COF hot press; Between the main screen golden finger 32 to the junction of pair screen LCD and flexible circuit board 3 ACF is set once more,, is electrically connected thereby reach by the crimping of COF hot press.During hot pressing, first hot pressing main screen LCD fixes main screen LCD (using the vacuum suction method) with anchor clamps then, avoiding when the secondary screen of the hot pressing LCD, because main screen LCD fixedly causes secondary LCD and FPC contraposition to move or causes the contraposition difficulty.Interface 34 by flexible circuit board 3 reaches disposable with main circuit board and is connected at last, and connected mode can be welding or mount.
Claims (3)
1. the LCD that has double screen, comprise main screen, the secondary main circuit board that shields and carry the control circuit of two screens of control, it is characterized in that: also comprise a flexible circuit board, described main screen and secondary screen directly are connected respectively on this flexible circuit board, and described flexible circuit board also is connected by on its interface and the main circuit board.
2. the LCD with double screen as claimed in claim 1 is characterized in that: described main screen and secondary screen pass through the ACF adhesive tape bonding on the corresponding golden finger of flexible circuit board.
3. the LCD with double screen as claimed in claim 1 or 2 is characterized in that: also be pasted with the SMT element on the described flexible circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520035156 CN2814454Y (en) | 2005-08-09 | 2005-08-09 | Liquid crystal display device with double-screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520035156 CN2814454Y (en) | 2005-08-09 | 2005-08-09 | Liquid crystal display device with double-screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2814454Y true CN2814454Y (en) | 2006-09-06 |
Family
ID=36949541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520035156 Expired - Lifetime CN2814454Y (en) | 2005-08-09 | 2005-08-09 | Liquid crystal display device with double-screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2814454Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102333136A (en) * | 2011-09-28 | 2012-01-25 | 东莞市亚星半导体有限公司 | Double-screen mobilephone |
-
2005
- 2005-08-09 CN CN 200520035156 patent/CN2814454Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102333136A (en) * | 2011-09-28 | 2012-01-25 | 东莞市亚星半导体有限公司 | Double-screen mobilephone |
| CN102333136B (en) * | 2011-09-28 | 2014-03-26 | 东莞市亚星半导体有限公司 | Double-screen mobilephone |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150809 Granted publication date: 20060906 |
|
| EXPY | Termination of patent right or utility model |