Snubber circuit and display apparatus using same

• US 10,574,133 B2
• Filed: 09/04/2017
• Issued: 02/25/2020
• Est. Priority Date: 08/25/2017
• Status: Active Grant

• Current Assignee: Chongqing HKC Optoelectronics Technology Co., Ltd. (Shenzhen Huike Investment Holding Co., Ltd.), HKC Corporation Limited (Shenzhen Huike Investment Holding Co., Ltd.)
• Original Assignee: HKC Corporation Limited (Shenzhen Huike Investment Holding Co., Ltd.)
• Inventors: Wang, Mingliang
• Primary Examiner(s): Berhane, Adolf D
• Application Number:
  US15/735,249
• Publication Number:
  US 20190267891A1
• Time in Patent Office: 904 Days
• CPC Class Codes: G09G 2330/025 Reduction of instantaneous peaks of current
• CPC Class Codes: G09G 2330/06 Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: G09G 3/36 using liquid crystals
• CPC Class Codes: H02M 1/34 Snubber circuits
• CPC Class Codes: H02M 1/346 Passive non-dissipative snubbers
• CPC Class Codes: H02M 1/348 Passive dissipative snubbers
• CPC Class Codes: H02M 1/44 Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
• CPC Class Codes: Y02B 70/10 Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

This application relates to a snubber circuit and a display apparatus using same. The snubber circuit is disposed on a circuit board of a display panel, and includes: a resistor unit, where two ends of the resistor unit are in a shape of being wide outside and being narrow inside in an inward direction, and a first end of the resistor unit is electrically coupled to an input signal; and a capacitor unit, including a first charge plate and a second charge plate disposed opposite to each other, where the first charge plate is electrically coupled to a second end of the resistor unit, and the second charge plate is electrically coupled to a grounding line, where the resistor unit and the capacitor unit are formed on the circuit, board in a manner of conductive line configuration.

Claims

1. A snubber circuit, disposed on a circuit board of a display apparatus, and comprising:

a resistor unit, wherein two ends of the resistor unit are in a shape of being wide outside and being narrow inside in an inward direction, and a first end of the resistor unit is electrically coupled to an input signal; and

a capacitor unit, comprising a first charge plate and a second charge plate disposed opposite to each other, wherein the first charge plate is electrically coupled to a second end of the resistor unit, and the second charge plate is electrically coupled to a grounding line, wherein

the resistor unit and the capacitor unit are formed on the circuit board in a manner of conductive line configuration;

wherein the first end of the resistor unit is configured in a fold line manner or a straight line manner or a curved line or an oblique line manner; and

wherein the second end of the resistor unit is configured in a fold line manner or a straight line manner or a curved line or an oblique line manner.

2. The snubber circuit according to claim 1, wherein the shape of being wide outside and being narrow inside comprises an hourglass shape.

3. The snubber circuit according to claim 1, wherein the shape of being wide outside and being narrow inside comprises a shape of two connected triangles.

4. The snubber circuit according to claim 1, wherein the first end is configured in a manner of equal line widths.

5. The snubber circuit according to claim 1, wherein the first end is configured in a manner of different line widths.

6. The snubber circuit according to claim 1, wherein the second end is configured in a manner of equal line widths.

7. The snubber circuit according to claim 1, wherein the second end is configured in a manner of different line widths.

8. The snubber circuit according to claim 1, wherein the first charge plate and the second charge plate are respectively disposed on different circuit board layers of the circuit board.

9. The snubber circuit according to claim 1, wherein the first charge plate and the second charge plate are respectively disposed at positions, corresponding to each other, of two different surfaces of the circuit board.

10. The snubber circuit according to claim 1, wherein the first charge plate and the second charge plate are circular.

11. The snubber circuit according to claim 1, wherein the first charge plate and the second charge plate are square.

12. The snubber circuit according to claim 1, wherein the first charge plate and the second charge plate are polygonal.

13. A snubber circuit, disposed on a circuit board of a display apparatus, and comprising:

a resistor unit, wherein two ends of the resistor unit are in a shape of being wide outside and being narrow inside in an inward direction, and a first end of the resistor unit is electrically coupled to an input signal;

a capacitor unit, comprising a first charge plate and a second charge plate disposed opposite to each other, wherein the first charge plate is electrically coupled to a second end of the resistor unit, and the second charge plate is electrically coupled to a grounding line, wherein

the circuit board is a multi-layer circuit board, the snubber circuit comprises the resistor unit and the capacitor unit, the two ends of the resistor unit are in the shape of being wide outside and being narrow inside in an inward direction, the first end and the second end of the resistor unit are continuously-curved lines, the first end of the resistor unit is electrically coupled to the input signal, the capacitor unit comprises the first charge plate and the second charge plate, the first charge plate and the second charge plate are disposed on different circuit board layers of the circuit board and at positions corresponding to each other, the first charge plate is electrically coupled to the second end of the resistor unit, and the second charge plate is electrically coupled to the grounding line; and

the resistor unit and the capacitor unit are formed on the circuit board in a manner of conductive line configuration;

wherein the first end of the resistor unit is configured in a fold line manner or a straight line manner or a curved line or an oblique line manner; and

wherein the second end of the resistor unit is configured in a fold line manner or a straight line manner or a curved line or an oblique line manner.

14. A display apparatus, comprising:

a display panel;

a control module, configured to provide a control signal to control the display panel;

a power supply module, configured to provide a power supply for operation of the control module and the display panel;

a switch unit, configured to control connectivity between the power supply module and the control module and the display panel; and

a snubber circuit, being a line connecting the switch unit, the control module, and the display panel, wherein

the snubber circuit comprises a resistor unit and a capacitor unit, two ends of the resistor unit are in a shape of being wide outside and being narrow inside in an inward direction, and a first end of the resistor unit is electrically coupled to an input signal;

the capacitor unit comprises a first charge plate and a second charge plate disposed opposite to each other, the first charge plate is electrically coupled to a second end of the resistor unit, and the second charge plate is electrically coupled to a grounding line; and

the resistor unit and the capacitor unit are formed on the circuit board in a manner of conductive line configuration;

wherein the first end of the resistor unit is configured in a fold line manner or a straight line manner or a curved line or an oblique line manner; and

wherein the second end of the resistor unit is configured in a fold line manner or a straight line manner or a curved line or an oblique line manner.