TW200425000A - Aging and light on system - Google Patents

Abstract

An aging and light on system to be electrically connected with plural display panels for performing aging test with the plural display panels is disclosed. The aging and light on system includes a signal generating device for generating a power signal and a first control signal, at least one signal regulating circuit electrically connected with the signal generating device for regulating the first control signal to a second control signal according to a detecting condition, and at least one voltage converting circuit electrically connected with the signal regulating circuit for enhancing the signal level and driving capacity of the power signal and the second control signal so that the power signal is capable of driving the display panels and the second control signal to perform the aging test with the display panels.

Description

200425000 V. Description of the invention (1) Field of the invention This case is a detection system, especially an aging light detection system. BACKGROUND OF THE INVENTION In recent years, as consumers ’awareness of consumption has increased, product quality requirements have become more stringent, so that manufacturers of liquid crystal display panels must not only work hard on product design, but also improve their manufacturing processes to compete in such a There is competition in the market. For manufacturers of liquid crystal display panels, the product life cycle has always been the focus of attention. Burn-in is one of the ways to provide manufacturers with a process certification and improve product reliability. After the burn-in test, the product can not only ensure the reliability and life cycle of the product, but also prevent the product from leaving the factory easily. Since the LCD panel is prone to failure after an uncertain period of time, aging lighting detection is a detection method developed to solve such defects. In order to accelerate the aging of these potentially defective products during the burn-in test and be eliminated early in the test process, so as to prevent these defective products from flowing into the hands of customers, the necessary aging lighting process can ensure the manufacturer Meet the requirements of customers and users for reliability, and visualize the inspection results to seek process improvements and solve them. With the advancement of the scientific and technological era, low-temperature low-temperature poly silicon thin film

200425000 V. Description of Invention (2)

Transistor Liquid Crystal Module (LTPS TFT-LCM) has been an electronic device often used in daily life, and it is mainly used in information appliances such as digital cameras and mobile phones. In order to detect the aging status of small-size low-temperature polycrystalline silicon thin-film transistor liquid crystal modules in various use environments and conditions, an aging lighting detection system is usually used during production testing to strengthen environmental testing variables to accelerate the small-size low-temperature polycrystalline silicon thin-film transistor liquid crystal The module aging speed and shorten the aging time, and then analyze the aging of small-size low-temperature polycrystalline silicon thin film transistor liquid crystal modules based on the data obtained from the inspection. At present, the traditional aging lighting system mainly includes a printed circuit board with a one-stage programmable gate array (FPGA) chip, wherein the printed circuit board is disposed in an environmental testing cavity and can be electrically connected to a flat display panel. In order to provide the signal and driving voltage required by the flat display panel, the detection process of aging lighting is performed. However, because the current information appliance (IA) system architecture is very messy, there is no standard requirement, there are many signal source specifications, and most of the design is limited to the use of LCD panels of medium size and above, and small-size low-temperature cannot be purchased on the market The specifications of the signal source used by the polycrystalline silicon thin-film transistor liquid crystal module make it necessary for the industry to develop and design a field programmable gate array (FPGA) chip by itself to meet the signal source and driver required for small-size low-temperature polycrystalline silicon thin-film transistor liquid crystal modules. Voltage. In addition, the currently used single-field programmable gate array chip (FPGA) provides insufficient driving power for the signal source, so it can only drive a single flat display panel, and cannot drive many panels at the same time. The field-programmable Gate array chip

Page 7 200425000 V. Description of the invention (3) (F PG A) The price is not cheap. This also makes the cost of setting up an aging lighting system much higher, and because of insufficient driving capacity, the production capacity cannot be increased. Therefore, how to provide an aging lighting system that can provide the signal source and driving voltage required for a small-sized low-temperature polycrystalline silicon thin-film transistor liquid crystal module, and can drive many flat display panels at the same time, are the main directions for the development of this case. Summary of invention

One of the main purposes of this case is to provide an aging lighting system, which can drive a plurality of flat display panels at the same time by a signal source output by a single field programmable gate array (FPGA) chip. Another main purpose of this case is to provide a burn-in lighting system, which is designed to increase the driving capacity of the system by designing a single field programmable gate array (F PGA) chip and a complex array signal adjustment circuit and booster circuit, thereby achieving Drive demand for many panels to increase capacity and save costs.

In order to achieve the above purpose, the present invention provides an aging lighting system, which is electrically connected to a plurality of flat display panels for performing the aging lighting test on the flat display panel. The aging lighting system in this case includes at least: a signal generator for generating a power signal and a first control signal; at least one signal adjusting circuit, which is electrically connected to the signal generator, and is configured to connect the signal generator according to a detection condition. The first control signal is adjusted to a second control signal output; and at least one booster circuit, which is electrically connected to a corresponding signal adjustment circuit, for increasing the power signal and the signal of the second control signal.

Page 8 200425000 V. Description of the invention (4) Level and driving ability, and then drive the flat display panel and the second control signal to drive the flat display panel to perform aging and lighting test by boosting the power supply signal. According to the concept of the present case, the signal generator is a field programmable gate array (FPGA) chip, which is used to generate a power signal and a first control signal. According to the idea of the present case, the aging lighting system is configured in an environmental testing chamber. According to the idea of this case, the signal generator generates a first reference signal, which is the reference signal required for the internal circuit of the flat display panel.

number. According to the idea of the present case, the signal adjustment circuit includes an operational amplifier (OPA) circuit for adjusting the voltage level of the first reference signal to generate a second reference signal output. According to the idea of the present case, the signal adjustment circuit includes a current amplifier circuit that adjusts the current gain of the first control signal to increase the number of flat display panels that the aging lighting system can drive. According to the idea of the present case, the boost circuit is a DC-DC converter circuit.

According to the idea of the present case, the flat display panel is a low temperature polycrystalline thin film transistor liquid crystal module. According to the idea of this case, the aging lighting system has ten sets of signal adjustment circuits and boost circuits. According to the idea of this case, each set of signal conditioning circuits and boost

Page 9 200425000 V. Description of the invention (5) The circuit can drive at least 6 flat display panels. This case can get a deeper understanding through the following diagrams and detailed descriptions: Simple diagram description First picture: It is the circuit block of the aging lighting system of the preferred embodiment of the case Not intended. Second figure: It is a circuit diagram of the operational amplifier circuit in the signal adjusting circuit shown in the first figure.

Explanation of icon symbols 10: Aging lighting system 11: Signal generator 12: Signal adjusting circuit 13: Booster circuit 14: Flat display panel 20: Operational amplifier circuit 21: Operational amplifier Sp: Power signal SC !: First. Control signal, signal SC 2: Control signal

Vcom_in: the first reference signal Vcom_out: the second reference signal

Description of the preferred embodiment Please refer to the first figure, which is a schematic circuit block diagram of the aging lighting system according to the preferred embodiment of the present invention. The embodiment shown in the first figure of this case is an example of driving a flat display panel of 60 pieces, but the same

Page 10 200425000 Description of the invention (6): f 3 and applications, users can design the system and adjust the number of ten-sided display panels according to their needs. As shown in the first figure, the aging lighting system of this case can be electrically connected to 60 flat-panel panels 14 to be used for the flat display panels 14. Lighting detection. The aging lighting system in this case is mainly composed of a signal generator 11, at least one signal conditioning circuit 12, and at least one booster circuit 13. 'The aging lighting system 10 and the flat display panel 14 are arranged in An environmental test chamber (not shown). In the above-mentioned embodiment, the signal generator 11 may be a field programmable gate array (FPG A) chip, which can be written by the user to detect conditions' and can be used to generate multiple signal sources including a power signal Sp A first control signal Sc! And a first reference signal (Vcom_in). In addition, the signal adjustment circuits 12 are electrically connected to the signal generator 11 respectively, and each signal adjustment circuit 12 mainly includes an operational amplifier (OPA) circuit and a current amplifier circuit. The operational amplifier (OPA) circuit and the current amplifier circuit of each signal adjustment circuit 12 are completed by circuit designs well known in the industry. Please refer to the second figure ', which is a schematic circuit diagram of the operational amplifier in the signal conditioning circuit shown in the first figure. As shown in the second figure, the operational amplifier (〇pA) circuit 20 uses the variable resistors R 1 and R 3, the resistor R 2 and the operational amplifier 21 to output the signal generator according to the requirements of different detection conditions. The first reference signal (Vcom-in) adjusts its voltage level to generate a second reference signal (Vcom-out) output for the flat display panel 14 to use.

200425000

V. Description of the invention (7) In addition, the 'current amplifying circuit (not shown) may be a circuit composed of a plurality of transistors, which can be used to increase the signal generation-enough to control the current gain of the signal SC1 to generate a second Control; the above makes the second aging detection system 10 can drive a larger number of flat display panels 14 at the same time. Since the design of the current amplifier circuit is well known in the industry, it will not be described again. Please refer to the first figure again, the plurality of booster circuits i 3 are electrically connected to a corresponding sfl number 3 Zhoulang circuit 12 ', and each The step-up circuit 13 can be electrically connected to a flat display panel 14 to perform an aging lighting test. Of course, in this embodiment, it is best that each of the booster circuits 3 and 3 corresponding to the signal adjustment circuit 12 can drive 6 flat display panels 14 at the same time. Each step-up circuit 1 3 may be a DC to DC converter circuit (1 2 V required for the level and driving energy input of the circuit 12), and the surface display panel 1 4 panel 14. Based on the above, one field can be used to increase the driver board by boosting 10 sets of signals, so that the plane display of the general plane is mainly used to enhance the signal generator. The signal strength of the power signal Sp and the second control signal Sc2 (for example, to raise the signal from 3.3V to a flat display panel and then drive the planes with a boosted power signal and input the first control signal SC 2 to the planes It shows that the aging lighting test is performed. The example shows that the aging lighting system in this case is mainly the signal source provided by the FPGA array chip, the signal adjustment and dynamic capabilities of the signal adjustment circuit 12 and the booster circuit 13. In addition, the number of display panels that can drive at least 6 flat display surfaces can reach 60. Of course, the panel suitable for this case is a small-size low-temperature polycrystalline silicon thin film transistor liquid.

200425000 V. Description of the invention (8) The crystal module (LTPS TFT-LCM) is the best. In summary, the aging lighting system provided in this case can indeed provide the signal source and driving voltage required for the aging detection of the flat display panel through the signal adjustment circuit and the booster circuit, and the improved signal level and driving Capability can drive a larger number of flat display panels. The burn-in detection system of this case only needs to use one field-programmable gate array chip to perform burn-in test on multiple test panels, which can save production costs and increase production capacity. Therefore, this case is of great industrial value, and the source filed an application according to law.

The invention in this case can be modified by people who are familiar with this skill, but they can all be protected by the scope of patent application.

Page 13 200425000 Brief description of the diagram. The first diagram: it is the circuit block of the aging lighting system of the preferred embodiment of this case. The second figure: it is a circuit diagram of the operational amplifier circuit in the signal adjusting circuit shown in the first figure. I ·· page 14

Claims (1)

200425000 VI. Scope of patent application Patent scope of application 1. A burn-in lighting system which is electrically connected to a plurality of flat display panels to perform burn-in lighting tests on these flat display panels. The burn-in lighting system includes at least : A signal generator for generating a power signal and a first control signal; at least one signal adjustment circuit, which is electrically connected to the signal generator, for adjusting the first control signal into a signal according to a detection condition; A second control signal output; and at least one booster circuit, which is electrically connected to a corresponding signal adjustment circuit for improving the signal level and driving capability of the power signal and the second control signal, and further by the The boosted power signal drives the flat display panels and the second control signal to perform an aging lighting test on the flat display panels. 2. The aging lighting system described in item 1 of the scope of patent application, wherein the signal generator is a field programmable gate array (FPGA) chip for generating the power signal and the first control signal. 3. The aging lighting system described in item 1 of the scope of patent application, wherein the signal generator further generates a first reference signal, which is a reference signal required for the internal circuit of the flat display panel. 4. The aging lighting system described in item 3 of the scope of patent application, wherein the signal adjustment circuit includes an operational amplifier (OPA) circuit for adjusting the voltage level of the first reference signal to generate a second reference Signal output. 5. The aging lighting system described in item 1 of the scope of patent application, wherein the news Page 15 200425000 VI. Patent Application Range The adjustment circuit includes a current amplifier circuit that adjusts the current gain of the first control signal to increase the number of flat display panels that the aging lighting system can drive. 6. The aging lighting system according to item 1 of the scope of patent application, wherein the step-up circuit is a DC-DC conversion circuit. 7. The aging lighting system described in item 1 of the scope of patent application, wherein the flat display panels are a low-temperature polycrystalline chip thin-film transistor liquid crystal module. 8. The aging lighting system according to item 1 of the scope of patent application, wherein the aging lighting system has ten sets of the signal conditioning circuit and the booster circuit. 9. The aging lighting system described in item 8 of the scope of patent application, wherein each set of signal conditioning circuit and booster circuit can drive at least 6 flat display panels. Page 16