CN201119084Y - Liquid crystal panel module light-off resetting device - Google Patents

Abstract

The utility model relates to a liquid crystal panel module lights-off resetting device, which mainly comprises a current detection module, a power switch module, a control module and a power supply resetting module, wherein the current detection module is connected with a liquid crystal panel module and a current supply module provided by a test device to form a current supply loop, the current detection module detects a loop current value and transmits the loop current value to the control module, the control module compares the loop current value with a standard current value, if the loop current value obtained by the control module is lower than the standard current value, the power supply resetting module is actuated to make the power supply switch module perform the resetting action, so that when the liquid crystal panel module is in a light-off state, the current is obtained again to carry out the lighting action for continuing the high temperature aging test, thereby increasing the practical efficacy characteristic in the whole implementation and use.

Description

LCD panel module light-off reset device

technical field

The utility model relates to a light-off reset device for a liquid crystal panel module, in particular to a liquid crystal panel module [Liquid Crystal Display Module; Increase the practicality of the liquid crystal panel module light-off reset device.

Background technique

Please refer to the schematic diagram of the existing aging lighting equipment test circuit in Fig. 5, the test circuit at least includes a signal generation module 51, a liquid crystal panel module 52, a power switch module 53 and a current supply module 54, the signal generation module 51 Connect with liquid crystal panel module 52, and provide liquid crystal panel module 52 a test signal with signal generating module 51, this power switch module 53 connects current supply module 54 and forms a current supply loop with liquid crystal panel module 52, and power switch module 53 is used to control the current supply loop to form a short circuit or an open circuit, and the current supply module 54 provides a current to the liquid crystal panel module 52 .

During the high temperature aging test, the power switch module 53 short-circuits the current supply circuit, so that the current supply module 54 supplies current to the liquid crystal panel module 52, and the liquid crystal panel module 52 starts to operate after obtaining the test signal and current for high temperature aging test.

During the test, if the connection line between the signal generation module 51 and the liquid crystal panel module 52 is not good enough to cause the liquid crystal panel module 52 to fail to obtain the test signal, or the components of the liquid crystal panel module 52 for receiving and displaying the test signal are defective. , will cause the liquid crystal panel module 52 to fail to display the test signal. In addition, when the components of the liquid crystal panel module 52 are overheated, the components are in poor contact, or the current or voltage obtained is unstable, the liquid crystal panel module 52 will also be unable to operate normally to display the test signal. This is called the lights-out phenomenon.

The light-off phenomenon does not necessarily mean that the liquid crystal panel module 52 is defective, but the liquid crystal panel module 52 cannot continue the high-temperature aging test. If the test is to continue, the tester needs to manually reset the power switch module 53 to make the liquid crystal panel module 52 regain current. to act. Therefore, in the current high-temperature aging test, when a small number of liquid crystal panel modules 52 have light-off phenomena, most liquid crystal panel manufacturers take a laissez-faire approach, and after the test, the liquid crystal panel modules 52 that have light-off phenomena will be subjected to high-temperature aging tests again. Therefore, Cause unnecessary waste of manpower and cost.

Therefore, in view of this, the creator has been adhering to years of rich experience in design, development and actual production in this related industry, researched and improved the existing structure and defects, and provided a light-off reset device for LCD panel modules, in order to completely improve the existing structure the missing purpose.

Contents of the invention

The light-off reset device for liquid crystal panel module of the present utility model is mainly applicable to the test equipment for high-temperature aging test of liquid crystal panel module. It connects a liquid crystal panel module and a current supply module provided by the test equipment. The light-off reset device includes a current A detection module, a power switch module, a control module and a power reset module.

The current supply module, the current detection module, the power switch module and the LCD panel module are connected in series to form a current supply circuit, the control module is connected to the current detection group, and the power reset module is connected to the control module and the power switch module. The module supplies a current, the current detection module detects a loop current value and transmits the loop current value to the control module, and the control module compares the loop current value with a standard current value.

When the LCD panel module turns off, the loop current value measured by the current detection module will decrease. If the loop current value obtained by the control module is lower than the standard current value, the power reset module will be activated to make the power switch module Perform the reset action, the LCD panel module will obtain the current again to perform the lighting action to continue the high temperature aging test.

In terms of design, the control module can add necessary functions according to the situation. For example, an inspection unit can be used to display whether the LCD panel module tested by the device has been turned off. The inspection unit can be designed with components such as light bulbs or light emitting diodes. In addition, the control module can be equipped with a storage unit to store the number of times that the loop current value is lower than the standard current value. This storage unit can be designed using IC or memory with digital logic circuits, and the control module further includes a counter to pre-set the LCD panel module. The number of times to execute the re-lighting action to avoid damage to the test equipment or waste of power resources due to continuous execution of the light action when any liquid crystal panel module is actually a defective product.

From the above, it can be known that a liquid crystal panel module light-off reset device provided by the utility model can enable the liquid crystal panel module to re-acquire current when the light-off phenomenon occurs during the high-temperature aging test, and this device is applicable to various liquid crystal The test equipment and circuit for the high-temperature aging test of the panel module have high applicability and can preliminarily determine the quality of the LCD panel module.

Description of drawings

The aforementioned purposes or features of the present utility model will be described in detail according to the following drawings. It should be understood that the following drawings and examples are only for illustration rather than limiting or narrowing the present utility model.

Fig. 1: the circuit block schematic diagram of the present utility model;

Fig. 2: the schematic circuit diagram of the utility model;

Fig. 3: Another embodiment circuit block diagram of the utility model;

Figure 4: a schematic diagram of a preferred configuration state of the present invention;

Figure 5: Schematic diagram of the existing aging lighting equipment test circuit.

Symbol Description:

(1) Lights out reset device (11) Current detection module

(12) Power switch module (13) Control module

(131) Signal management unit (132) Viewing unit

(133) Counter (134) Storage unit

(14) Power reset module (2) Current supply module

(3) LCD panel module (4) Signal generation module

(51) Signal generating module (52) LCD panel module

(53) Power switch module (54) Current supply module

Detailed ways

In order to make the technical content, creation purpose and the effect that can be achieved of the present utility model disclosed more completely and clearly, please refer to the disclosed drawings and figure numbers and describe them in detail as follows:

First of all, please refer to Fig. 1 for the circuit block diagram of the utility model and Fig. 2 for the circuit schematic diagram of the utility model. composed of; of which:

The light-off reset device 1 includes a current detection module 11, a power switch module 12, a control module 13 and a power reset module 14, the current detection module 11 and the power switch module 12, the current supply module 2 and the liquid crystal panel module 3-phase connection forms a current supply loop, and the control module 13 includes at least a signal management unit 131, the signal management unit 131 is connected to the current detection module 11 and the power reset module 14, and the power reset module 14 is connected to the power switch The modules 12 are connected to each other, and a signal generating module 4 is externally connected to the liquid crystal panel module 3, and the signal generating module 4 provides a test signal to the liquid crystal panel module 3 for testing.

When the high-temperature aging test is performed, the power switch module 12 of the light-off reset device 1 is activated to form a short circuit in the current supply circuit, the current supply module 2 will provide a current to activate the liquid crystal panel module 3, and the signal generation module 4 will send a test signal, The test signal is received and displayed by the liquid crystal panel module 3, the current detection module 11 will detect a loop current value and send it to the signal management unit 131, and the signal management unit 131 will compare the loop current value with a pre-stored standard current value Numerical comparison.

When the light-off phenomenon occurs, the loop current value measured by the current detection module 11 will decrease, and the control module 13 will send a reset signal when the loop current value is lower than the standard current value to activate the power reset module 14 to operate The power switch module 12 resets, so that the liquid crystal panel module 3 obtains current again to be reactivated.

The power switch module 12 can be designed and formed by using a silicon controlled rectifier (SCR), an AC silicon controlled rectifier (TRAIC) or a relay (RELAY); the power reset module 14 can be a control circuit to operate the power switch module 12 action.

In addition, a viewing unit 132 and a counter 133 can be provided in the control module 13. The viewing unit 132 is connected to the signal management unit 131 and controlled by it. When the loop current value of the signal management unit 131 is lower than the standard current value for the first time, that is, It will control the action of the viewing unit 132 and change its state, indicating that the current drop has been measured or the phenomenon of turning off the light has occurred. The viewing unit 132 can be a light bulb, a light-emitting diode, a seven-segment display or a liquid crystal display; and the counter 133 is also connected to the signal The management unit 131 is controlled by it. The counter 133 is used to count the number of times that the loop current value is lower than the standard current value. When a preset value is reached, a stop signal will be sent to the signal management unit 131 to make the signal The management unit 131 stops sending the reset signal to the power reset module 14 .

Please also refer to FIG. 3 as shown in the circuit block diagram of another embodiment of the utility model. A storage unit 134 may also be provided in the control module 13, and the storage unit 134 is also connected to the signal management unit 131 and controlled by it. The number of times the loop current value is lower than the standard current value is stored in the storage unit 134 via the signal management unit 131 , and the value stored in the storage unit 134 is displayed by the viewing unit 132 through the signal management unit 131 .

Also, please refer to FIG. 4 for a schematic diagram of a preferred configuration state of the present invention, which provides a plurality of light-off reset devices 1, a signal generating module 4, a current supply module 2 and a plurality of liquid crystal panel modules 3, Each light-off reset device 1 is connected to the current supply module 2 at the same time, and each light-off reset device 1 is connected to a corresponding liquid crystal panel module 3, and each liquid crystal panel module 3 is provided with current through the current supply module 2, each The light-off reset device 1 and the corresponding liquid crystal panel module 3 and current supply module 2 connected to it are each an independent test circuit. When one of the liquid crystal panel modules 3 has a light-off phenomenon, the light-off reset device 1 performs a current reset action. , it will not affect the test circuits of other liquid crystal panel modules 3 .

The aforementioned embodiments or drawings do not limit the structural shape or size of the present utility model, and any appropriate changes or modifications by those skilled in the art shall be considered as not departing from the scope of the patent of the present utility model.

Through the above, the structural composition and use implementation description of the utility model can be seen. Compared with the existing structure, the utility model uses the current detection module to detect the current value of the first loop and transmit the loop current value to the control system. Module, the control module will compare the loop current value with a standard current value, if the loop current value obtained by the control module is lower than the standard current value, it can make the power reset module actuate to reset the power switch module Action, so that when the LCD panel module is turned off, the current will be re-obtained to perform the lighting action to continue the high-temperature aging test, and the overall implementation and use will have more practical features.

Claims (5)

1. a liquid crystal panel module light-off re-setting device is made up of light-off re-setting device collocation electric current supply module, liquid crystal panel module and signal generator module; It is characterized in that:

This liquid crystal panel module light-off re-setting device comprises a current detection module, a power switching module, a control module and a power supply replacement module, this current detection module is connected with electric current supply module and liquid crystal panel module with power switching module and forms an electric current supply loop, and control module comprises a SIGNALS MANAGEMENT unit at least, the SIGNALS MANAGEMENT unit connects current detection module and power supply replacement module, power supply replacement module is connected with power switching module again, the external signal generator module of liquid crystal panel module.

2. liquid crystal panel module light-off re-setting device as claimed in claim 1, it is characterized in that: establish one in the control module and inspect the unit, this is inspected the unit and connects the SIGNALS MANAGEMENT unit, and this inspects the unit is wherein a kind of of bulb, light-emitting diode, seven-segment display, LCD.

3. liquid crystal panel module light-off re-setting device as claimed in claim 1 is characterized in that: establish a counter in the control module, counter connects the SIGNALS MANAGEMENT unit.

4. liquid crystal panel module light-off re-setting device as claimed in claim 1 is characterized in that: be provided with a storage element in the control module, storage element connects the SIGNALS MANAGEMENT unit.

5. liquid crystal panel module light-off re-setting device as claimed in claim 1 is characterized in that: this power switching module is wherein a kind of of thyristor, AC system thyristor, relay.

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