CN201522840U - Single power supply liquid crystal display module - Google Patents
Single power supply liquid crystal display module Download PDFInfo
- Publication number
- CN201522840U CN201522840U CN200920054786XU CN200920054786U CN201522840U CN 201522840 U CN201522840 U CN 201522840U CN 200920054786X U CN200920054786X U CN 200920054786XU CN 200920054786 U CN200920054786 U CN 200920054786U CN 201522840 U CN201522840 U CN 201522840U
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- lcd module
- driving
- liquid crystal
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Abstract
The utility model relates to the technical field of liquid crystal display modules, in particular to a single power supply liquid crystal display module comprising a liquid crystal display screen, a driving chip and a control chip. The control chip controls the driving chip which drives the liquid crystal display screen; and the driving chip is connected with a boost circuit. The display module adopts the boost circuit inside, thereby reducing the number of additional power supplies, enhancing the extension and suitability of the integrated product and having high interference resistance and stable performance.
Description
Technical field:
The utility model relates to the LCD MODULE technical field, particularly the single supply LCD MODULE.
Background technology:
At present, LCDs is widely used in various fields, as home telephone, network monitoring device, domestic air conditioning, refrigerator, electronic game machine, Tachographs, learning machine, fuel charger, automotive test equipment or the like.
Though 5.0 cun color LCD screen applications more and more widely a few days ago, but the use interface inconvenience of the display module that most display screen constitutes, the pin number order is more, and power supply power supply trouble, the outside needs a plurality of power supplys to display screen work, so, will make end product manufacturer will increase different power supplies, cause the not high problem of production efficiency according to different LCDs.There are these defectives in the display module that aforementioned 5.0 cun color LCD screens constitute, so can not be widely used on the products such as mobile TV, removable computer, satellite navigation system.
For 5.0 cun color LCD screens can be widely used on the products such as mobile TV, removable computer, satellite navigator, need carry out technological improvement to existing LCD MODULE product, to improve the effect of product.
The utility model content:
The purpose of this utility model is to provide the single supply LCD MODULE at the deficiencies in the prior art, it has the characteristics of stable performance, strong interference immunity, simultaneously, it does not need peripheral cell, all peripheral cells are integrated into above the display module, it is minimum to use the pin position to accomplish, thereby the circuit cabling is shorter, and extendability is strong.
For achieving the above object, the utility model adopts following technical scheme:
It comprises LCDs, chip for driving, control chip, control chip controlling and driving chip, and chip for driving drives LCDs, and chip for driving is connected with booster circuit.
Described chip for driving is connected with single power supply.
Described booster circuit comprises the chip that boosts, the model of chip of boosting is LT1615, is connected with inductance between the 5th pin of the chip that boosts, the 1st pin, and the 5th pin connects input voltage, the 1st pin is connected with the input end of diode, the output terminal output voltage of diode.
The 4th pin of the described chip that boosts connects input voltage.
The 2nd pin ground connection of the described chip that boosts is connected with electric capacity between input voltage and the ground.
Be parallel with two electric capacity between described output voltage and the ground.
Be in series with two resistance between the output terminal of described diode and the ground, the intermediate connection point of two resistance is connected with the 3rd pin of the chip that boosts.
The beneficial effects of the utility model are, have adopted booster circuit in the display module, thereby can reduce the number of power sources that adds, and make the extendability of product integral body and suitability be enhanced, and antijamming capability is strong, stable performance.
Description of drawings:
Fig. 1 is control principle figure of the present utility model
Fig. 2 is the schematic diagram of booster circuit of the present utility model
Embodiment:
Below in conjunction with accompanying drawing the utility model is further described.
The following stated only is a better embodiment of the present utility model, does not therefore limit protection domain of the present utility model.
See accompanying drawing 1,2, the utility model comprises: LCDs, chip for driving, control chip, certainly, LCD MODULE also comprises some other parts, does not give unnecessary details at this, wherein, control chip is that CPU is used for the controlling and driving chip operation, and chip for driving is used to drive LCDs work, and is special, chip for driving is connected with booster circuit, and described chip for driving is connected with single power supply; Adopt the boost function of booster circuit, make LCD MODULE by original outside multiple feed, become single power supply, do not need peripheral cell, all peripheral cells are integrated into above the display module, the use pin position of chip is accomplished minimum, thereby line layout is shorter, the stable performance of module whole, strong interference immunity.
Described booster circuit comprises the chip that boosts, and the model that the chip that boosts adopts is LT1615, and this chip has advantages such as output accuracy height, the high and low power of conversion efficiency; Boosting is connected with inductance L 1, the 5 pin between the 5th pin, the 1st pin of chip and connects input voltage VCC, and the 1st pin is connected with the input end of diode D2, the output terminal output voltage AVDD of diode D2.
The 4th pin of the described chip that boosts connects input voltage VCC.
The 2nd pin ground connection of the described chip that boosts is connected with capacitor C 25 between input voltage VCC and the ground.
Be parallel with two capacitor C 26, C27 between described output voltage AVDD and the ground.
Be in series with two resistance R 31, R32 between the output terminal of described diode D2 and the ground, the intermediate connection point of two resistance R 31, R32 is connected with the 3rd pin of the chip that boosts.
Wherein, the principle of work of booster circuit is: input voltage VCC is 2.5～4.0V, and capacitor C 25 plays the effect of power filter, and power supply is not disturbed; Inductance L 1 and diode D2 realize that electric current discharges and recharges and rectification output; Capacitor C 26, C27 play the effect of power filter, and some clutters of output voltage AVDD are removed, and voltage is exported stably; Resistance R 31, R32 regulate the AVDD output voltage, and maximum output voltage can reach 34V.
The application's circuit interface adopts 24 bit digital interfaces of standard, and is better compatible, the display screen rich color.Power supply adopts the low-voltage single power supply, can save a large amount of peripheral cells, and antijamming capability is good, and interface uses simple, designs in conjunction with products such as present mobile TV, removable computer, satellite navigators, and Convenient interface uses and designs.
This circuit peripheral cell is few, and voltage output is stable; The chip that boosts also has in opening process and the effect of protection is provided under short-circuit conditions.
Claims (7)
1. single supply LCD MODULE, it comprises LCDs, chip for driving, control chip, control chip controlling and driving chip, chip for driving drives LCDs, and it is characterized in that: chip for driving is connected with booster circuit.
2. single supply LCD MODULE according to claim 1 is characterized in that: described chip for driving is connected with single power supply.
3. single supply LCD MODULE according to claim 1, it is characterized in that: described booster circuit comprises the chip that boosts, the model of chip of boosting is LT1615, boost and be connected with inductance between the 5th pin, the 1st pin of chip, the 5th pin connects input voltage, the 1st pin is connected with the input end of diode, the output terminal output voltage of diode.
4. single supply LCD MODULE according to claim 3 is characterized in that: the 4th pin of the described chip that boosts connects input voltage.
5. single supply LCD MODULE according to claim 3 is characterized in that: the 2nd pin ground connection of the described chip that boosts is connected with electric capacity between input voltage and the ground.
6. single supply LCD MODULE according to claim 3 is characterized in that: be parallel with two electric capacity between described output voltage and the ground.
7. single supply LCD MODULE according to claim 6 is characterized in that: be in series with two resistance between the output terminal of described diode and the ground, the intermediate connection point of two resistance is connected with the 3rd pin of the chip that boosts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920054786XU CN201522840U (en) | 2009-04-17 | 2009-04-17 | Single power supply liquid crystal display module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920054786XU CN201522840U (en) | 2009-04-17 | 2009-04-17 | Single power supply liquid crystal display module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201522840U true CN201522840U (en) | 2010-07-07 |
Family
ID=42509016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920054786XU Expired - Fee Related CN201522840U (en) | 2009-04-17 | 2009-04-17 | Single power supply liquid crystal display module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201522840U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103714779A (en) * | 2013-12-19 | 2014-04-09 | 电子科技大学 | Source driving circuit and driving method of active matrix/organic light emitting diode (AMOLED) pixel array |
| CN110728961A (en) * | 2019-10-22 | 2020-01-24 | 南京熊猫电子制造有限公司 | Delay control circuit and control method on liquid crystal display |
-
2009
- 2009-04-17 CN CN200920054786XU patent/CN201522840U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103714779A (en) * | 2013-12-19 | 2014-04-09 | 电子科技大学 | Source driving circuit and driving method of active matrix/organic light emitting diode (AMOLED) pixel array |
| CN110728961A (en) * | 2019-10-22 | 2020-01-24 | 南京熊猫电子制造有限公司 | Delay control circuit and control method on liquid crystal display |
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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: 20100707 Termination date: 20120417 |