Backlight LED protection system

Abstract

The utility model relates to a backlight LED protection system. The backlight LED protection system comprises a backlight IC module and a protection module, the protection module comprises a first limiting unit and a second limiting unit, the first limiting unit and the second limiting unit are electrically connected with the backlight IC module, and the first limiting unit is electrically connected with the second limiting unit. According to the scheme provided by the invention, the backlight IC cannot be burnt out when the television is in any working mode.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit design, in particular to a backlight LED protection system. Background Art

[0002] Backlight LED is the backlight source of the display screen. Backlight LED has the characteristics of low power consumption, low heat generation, high brightness and long life.

[0003] In the related art, when the backlight LED needs to be dimmed to 100%, since there is no protection circuit in the backlight IC circuit, the current and voltage are prone to increase suddenly, thereby burning out the backlight IC. Utility Model Content

[0004] The utility model aims to overcome the shortcomings of the prior art and provide a backlight LED protection system, which can ensure that the backlight IC will not burn out in any working mode of the television.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] In a first aspect, the present application provides a backlight LED protection system, comprising: a backlight IC module; a protection module, wherein the protection module comprises a first limiting unit and a second limiting unit, wherein the first limiting unit and the second limiting unit are electrically connected to the backlight IC module respectively, and the first limiting unit is electrically connected to the second limiting unit.

[0007] The first limiting unit includes a diode D205 and an inductor L203. The first end of the diode D205 is electrically connected to the backlight IC module and the first end of the inductor L203 respectively. The second end of the diode D205 is electrically connected to the second end of the inductor L203.

[0008] The second limiting unit includes a diode D206 and an inductor L204. The first end of the diode D206 is electrically connected to the backlight IC module and the first end of the inductor L204 respectively. The second end of the diode D206 is electrically connected to the second end of the inductor L204.

[0009] The protection module further includes a resistor R270 , a first end of the resistor R270 is electrically connected to a second end of the inductor L203 , and a second end of the resistor R270 is electrically connected to a second end of the inductor L204 .

[0010] The protection module further includes a lamp LED1, and the lamp LED1 is electrically connected to the second end of the diode D205.

[0011] The protection module further includes a lamp LED2, and the lamp LED2 is electrically connected to the second end of the diode D206.

[0012] It also includes connectors, which are electrically connected to the lamp LED1 and the lamp LED2 respectively.

[0013] It also includes an interface, which is arranged on the connector.

[0014] The backlight IC module includes a first backlight chip integrated unit, and the first backlight chip integrated unit is electrically connected to the first end of the diode D205.

[0015] The backlight IC module includes a second backlight chip integrated unit, and the second backlight chip integrated unit is electrically connected to the first end of the diode D206.

[0016] Compared with the prior art, the utility model has at least the following advantages:

[0017] By providing the first limiting unit and the second limiting unit, the voltage and current of the backlight LED can be kept stable in any working mode without sudden changes, thereby ensuring that the backlight IC of the backlight IC module is not burned out. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments are briefly introduced below.

[0019] Figure 1 This is a functional module diagram of a backlight LED protection system in one embodiment of the utility model;

[0020] Figure 2 FIG. 4 is a circuit diagram of a backlight LED protection system in an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0022] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0023] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] In the related art, when the backlight LED needs to be dimmed to 100%, since there is no protection circuit in the backlight IC circuit, the current and voltage are prone to increase suddenly, thereby burning out the backlight IC.

[0025] In view of the above problems, an embodiment of the present application provides a backlight LED protection system, which can ensure that the backlight IC will not burn out in any working mode of the TV.

[0026] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0027] See also Figure 1 A backlight LED protection system includes: a backlight IC module 100; a protection module 200, the protection module 200 includes a first limiting unit 210 and a second limiting unit 220, the first limiting unit 210 and the second limiting unit 220 are electrically connected to the backlight IC module 100 respectively, and the first limiting unit 210 is electrically connected to the second limiting unit 220.

[0028] It should be noted that by providing the first limiting unit 210 and the second limiting unit 220 , the voltage and current of the backlight LED can be kept stable in any working mode without sudden changes, thereby ensuring that the backlight IC of the backlight IC module 100 is not burned out.

[0029] See also Figure 2Specifically, the first limiting unit 210 includes a diode D205 and an inductor L203, a first end of the diode D205 is electrically connected to the backlight IC module and a first end of the inductor L203 respectively, and a second end of the diode D205 is electrically connected to a second end of the inductor L203.

[0030] See also Figure 2 More specifically, the second limiting unit 220 includes a diode D206 and an inductor L204, wherein a first end of the diode D206 is electrically connected to the backlight IC module 100 and a first end of the inductor L204, respectively, and a second end of the diode D206 is electrically connected to a second end of the inductor L204. More specifically, the protection module 200 further includes a lamp LED1, which is electrically connected to a second end of the diode D205. More specifically, the protection module 200 further includes a lamp LED2, which is electrically connected to a second end of the diode D206.

[0031] It should be noted that when current flows through the inductor L203 and the inductor L204, the current ripple will become smaller according to the characteristics of the inductor. When the current drops from the maximum to zero, due to the characteristics of the lamp LED, the cathode voltage of the lamp LED1 and the lamp LED2 will increase, and the anode voltage of the diode D205 and the diode D206 will increase, but the cathode voltage of the diode D205 and the diode D206 will not change, and maintain a relatively reasonable voltage value. Due to the characteristics of the inductor, the current of the inductor will not change suddenly, and the voltage across the inductor L203 and the inductor L204 is the same as that of the diode, so that the voltage and current of the lamp LED1 and the lamp LED2 are always kept in a reasonable range, thereby protecting the backlight IC of the backlight IC module 100 from burning out during the process of switching the working mode of the TV.

[0032] See also Figure 2 , further, in one embodiment, the backlight IC module 100 includes a first backlight chip integrated unit, and the first backlight chip integrated unit is electrically connected to the first end of the diode D205.

[0033] See also Figure 2 , further, in one embodiment, the backlight IC module 100 includes a second backlight chip integrated unit, and the second backlight chip integrated unit is electrically connected to the first end of the diode D206.

[0034] It should be noted that the first backlight chip integrated unit and the second backlight chip integrated unit have the same circuit structure, including two backlight ICs.

[0035] See also Figure 2Furthermore, in one embodiment, the protection module 200 further includes a resistor R270, a first end of the resistor R270 is electrically connected to the second end of the inductor L203, and a second end of the resistor R270 is electrically connected to the second end of the inductor L204.

[0036] It should be noted that the resistor R270 is a current limiting resistor that plays a role in protecting the circuit.

[0037] See also Figure 2 Furthermore, in one embodiment, a connector CN201 is further included, and the connector CN201 is electrically connected to the lamp LED1 and the lamp LED2 respectively. An interface is further included, and the interface is arranged on the connector CN201.

[0038] It should be noted that the interface on the connector CN201 is used to be electrically connected to the lamp LED1 and the lamp LED2, and then connected to other components.

[0039] The scheme of the present application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of the various embodiments have their own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the specification are not necessarily required for the present application. In addition, it can be understood that the steps in the method of the embodiment of the present application can be adjusted in order, merged and deleted according to actual needs, and the modules in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0040] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A backlight LED protection system, characterized in that: include: Backlight IC module; The protection module includes a first limiting unit and a second limiting unit, wherein the first limiting unit and the second limiting unit are electrically connected to the backlight IC module respectively, and the first limiting unit is electrically connected to the second limiting unit.

2. The backlight LED protection system according to claim 1, characterized in that: The first limiting unit includes a diode D205 and an inductor L203. The first end of the diode D205 is electrically connected to the backlight IC module and the first end of the inductor L203 respectively. The second end of the diode D205 is electrically connected to the second end of the inductor L203.

3. The backlight LED protection system according to claim 2, characterized in that: The second limiting unit includes a diode D206 and an inductor L204. The first end of the diode D206 is electrically connected to the backlight IC module and the first end of the inductor L204 respectively. The second end of the diode D206 is electrically connected to the second end of the inductor L204.

4. The backlight LED protection system according to claim 3, characterized in that: The protection module further includes a resistor R270 , a first end of the resistor R270 is electrically connected to a second end of the inductor L203 , and a second end of the resistor R270 is electrically connected to a second end of the inductor L204 .

5. The backlight LED protection system according to claim 3, characterized in that: The protection module further includes a lamp LED1, and the lamp LED1 is electrically connected to the second end of the diode D205.

6. The backlight LED protection system according to claim 5, characterized in that: The protection module further includes a lamp LED2, and the lamp LED2 is electrically connected to the second end of the diode D206.

7. The backlight LED protection system according to claim 6, characterized in that: It also includes connectors, which are electrically connected to the lamp LED1 and the lamp LED2 respectively.

8. The backlight LED protection system according to claim 7, characterized in that: It also includes an interface, which is arranged on the connector.

9. The backlight LED protection system according to claim 6, characterized in that: The backlight IC module includes a first backlight chip integrated unit, and the first backlight chip integrated unit is electrically connected to the first end of the diode D205.

10. The backlight LED protection system according to claim 6, characterized in that: The backlight IC module includes a second backlight chip integrated unit, and the second backlight chip integrated unit is electrically connected to the first end of the diode D206.

Images