Patent Application
20110115304
The present invention is related to a power supply structure of printer, and more particularly to an auxiliary power supply structure having farad-grade super capacitor, simplifying power supply structure and reducing cost thereof, effectively lowering energy consumption in operation, and sufficiently providing high transient power.
Printers have many types, such as inkjet printers, laser printers, heat transfer printers, sublimation printers and the like. Recently, keeping abreast with widespread personal computers and booming internet development, printers have become essential peripheral products of latest computers. As far as product appearance and practical functions are concerned, printers are well stocked with all kinds of things. In addition to regular compact printers good for printing demand of various personal documents, professional printers for special purposes are also available to all walks of life.
With reference to
However, flaws of such circuit planning do exist. The trade of upgraded fundamental power supply specification of power circuit for the demand of high transient power simply ends up with higher levels of components adopted internally, making the building cost of the power circuit relatively higher. Besides, more importantly is that such higher standard power supply usually consumes more energy upon power-on and certainly fails to comply with energy-saving and carbon-reducing green environmental protection.
The main objective of the present invention is to provide a power supply structure of printer simplifying power supply structure and reducing cost thereof, effectively lowering energy consumption in operation, and sufficiently providing high transient power.
The power supply structure has a power supply circuit and an auxiliary charging circuit.
The power supply circuit outputs regular power for printing. The auxiliary charging circuit has a plurality of farad grade super capacitors collaborated with a voltage-stabilized charging loop to supply high transient power so as to be adapted to maintain normal operation of the printer.
Given the power structure, the power supply circuit is simplified to reduce the building cost thereof, and the energy waste in operation is effectively lowered, so as to sufficiently provide high transient power and deliver better printing result.
The foregoing and other features and advantages of the present invention will be more clearly understood through the following descriptions with reference to the drawing, wherein:
The present invention will now be described more specifically with reference to the following embodiments. It is to be noted that the following descriptions of preferred embodiments of this invention are presented herein for the purpose of illustration and description only; it is not intended to be exhaustive or to be limited to the precise form disclosed.
With reference to
The power supply circuit (1) serves to output normal power for regular printing. The auxiliary charging circuit (2) has a plurality of farad-grade super capacitor (21) in collaboration with a voltage-stabilized charging loop (22) to satisfy power consumption requiring high transient power and maintain normal operation of a printer (3).
As a result of the component characteristics of current super capacitors (21), their withstand voltage are not high. Applications shall be serially connected to operate if exceeding the withstand voltage thereof. However, serially-connected operation will incur unbalanced charge and discharge, that is, inconsistent charged or discharged power of each capacitor, and voltage-withstanding issue of individual capacitor. Hence, the auxiliary charging circuit (2) is particularly planned and designed upon implementing to simultaneously solve the voltage-withstanding and unbalanced charging and discharging issues, and is mounted in the form of a plurality of serially-connected layers (221). Each layer (221) is composed of a zener diode (222) and a farad grade super capacitor (21) connected therewith in parallel, and the plurality of super capacitors (21) and zener diodes (222) mounted in the auxiliary charging circuit (2) all pertain to levels with same specification (or same level but with different specifications).
With reference to
Accordingly, the auxiliary charging circuit (2), which is composed of the plurality of zener diodes (21) having farad grade capacity in collaboration with the plurality of zener diodes (222), is connected with an output circuit of a power supply circuit (1) to respond to the high transient power of a printer and address a better printing effect. Normal power for regular printing is outputted by the power supply circuit (1). This makes the output current of the power supply circuit (1) is relatively and noticeably smaller than the conventional circuit. Consequently, relatively lower levels of output specifications are adopted. So, the building cost of the power supply circuit is also lower. Besides, the output current of the power supply circuit (1) becomes smaller, making the power supply circuit (1) more energy-saving than the conventional circuit upon powering on. Printers manufactured by adopting the power supply circuit (1) comply with green environmental protection concepts to be more power-saving and carbon-reducing.
With reference to
In sum, the composition of the present invention is simplified and practical and the function thereof is superior to the conventional power supply structure of printers. The present invention thus provides the practical and innovative value to the industry, and the application is hereby submitted in accordance with the patent laws.
While the invention has been described in terms of what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention needs not be limited to the disclosed embodiments. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims, which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures.
