Optical point expansion and shrinkage control method for multi-layer ultrathin fine circuit display driving board

Abstract

The invention relates to a multi-layer ultrathin fine circuit display driving board optical point expansion and shrinkage control method, which comprises a seasonal compensation rule, a seasonal compensation rule is adopted according to seasonal information, and the seasonal compensation rule is formulated by an engineering technology department according to a size pre-amplification compensation table; afterwards, a production and quality management department performs production and quality inspection according to a photovoltaic panel (FD-FD) control table, and adjusts a seasonal compensation rule according to the one-way change trend of temperature and humidity, the daily highest temperature and the judgment of a target hole alignment deviation value, thereby achieving the intelligent adjustment of a film compensation coefficient, improving the accuracy and stability of expansion and contraction control, and achieving the intelligent adjustment of the film compensation coefficient. And the alignment deviation risk caused by season alternation is effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of printed circuit board manufacturing, in particular to the technical field of optical point expansion and contraction control method of multi-layer ultra-thin fine line display driving board. BACKGROUND

[0002] With the development of display technology, multi-layer ultra-thin fine line display driving boards are widely used in high-precision electronic devices. In the manufacturing process of such PCBs, optical point (FD-FD[Full Dimension to Full Dimension]) expansion and contraction control is a key process link to ensure interlayer alignment accuracy, improve product yield, and ensure display quality.

[0003] Currently, the industry generally uses a pre-compensation method based on a historical expansion and contraction database to adjust the inner layer film coefficient, and feedback correction is performed by measuring the actual expansion and contraction data of the target hole after pressing the test board. However, the traditional method does not fully consider the influence of seasonal environmental changes on the thermal expansion and contraction behavior of materials, especially when temperature and humidity fluctuate significantly, which can easily cause the compensation coefficient to deviate from the actual demand, resulting in interlayer alignment deviation, affecting pixel distribution consistency, causing display problems such as color difference, blur, image distortion, etc., ultimately leading to product scrap, increasing costs and affecting customer delivery cycle. SUMMARY

[0004] In view of the above-mentioned needs, the present application proposes a multi-layer ultra-thin fine line display driving board optical point expansion and contraction control method, which aims to solve the problem of optical point (FD-FD) expansion and contraction caused by expansion and contraction through seasonal compensation, and improve the manufacturing yield and product consistency of multi-layer ultra-thin fine line display driving boards.

[0005] To achieve the above-mentioned purposes, the following technical solutions are adopted: The present application proposes a multi-layer ultra-thin fine line display driving board optical point expansion and contraction control method, including a seasonal compensation rule, the determination steps of which are as follows: Step 1: According to the seasonal information, adopt the seasonal compensation rule, and the winter compensation rule is formulated by the engineering and technical department according to the size pre-compensation table; Step 2: The production and quality management department produces and inspects according to the photoelectric board (FD-FD) control table; Step 3: Determine whether the temperature and humidity show a one-way change trend within the first preset time and whether the daily maximum temperature deviates from the preset temperature range, if yes, execute step 4, if not, continue to execute according to the rule of step 1; Step 4: Determine whether the target registration deviation data of the in-plant finished product target hole within the second preset time is unidirectional variation trend, if yes, execute the seasonal compensation rule, if not, continue to execute according to the rule of step 1.

[0006] In this way, by introducing the compensation rule based on seasonal information, and combining the dual judgment mechanism of temperature and humidity trend and in-plant finished product data fluctuation, the intelligent adjustment of the film compensation coefficient is realized. This method not only improves the accuracy and stability of the expansion control, but also effectively reduces the risk of registration deviation caused by seasonal alternation, significantly improves the process consistency and product reliability in the production process.

[0007] In some possible embodiments, the size pre-compensation table is prepared according to the change of seasons and the change of temperature and humidity to obtain the inner layer film pre-compensation coefficient in different seasons through experiments.

[0008] In some possible embodiments, the first preset time is 7 days.

[0009] In some possible embodiments, the second preset time is twice the first preset time.

[0010] In some possible embodiments, the preset temperature is the annual average temperature of the local factory.

[0011] In some possible embodiments, the seasonal compensation rule includes winter compensation rule and summer compensation rule.

[0012] In some possible embodiments, under the winter compensation rule, the unidirectional change of temperature and humidity is upward trend, and the unidirectional change of the target hole registration deviation value data is upward trend.

[0013] In some possible embodiments, under the summer compensation rule, the unidirectional change of temperature and humidity is downward trend, and the unidirectional change of the target hole registration deviation value data is downward trend.

[0014] In some possible embodiments, the winter compensation rule and the summer compensation rule are executed cyclically. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the flowchart of the expansion control method of the present application. DETAILED DESCRIPTION

[0016] The features and other related features of the present application are further described in detail by the following examples for the understanding of the skilled in the art: The features of the present application and other related features are further described in detail below with examples for the understanding of those skilled in the art: It should be noted that the terms "front", "back", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "bottom" and "top", "inner" and "outer" refer to the directions towards or away from the geometric center of a particular component.

[0017] Further, unless otherwise clearly indicated and limited, the terms "mount", "connect", "connection" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in this case can be understood according to the specific circumstances.

[0018] In the current optical point (FD-FD) expansion control manufacturing process, the inner layer film coefficient is usually set by using the pre-compensation method based on the existing expansion database, and the actual expansion data of the target hole is measured by pressing the target hole after the test plate is pressed, so as to inversely deduce a more accurate inner layer film compensation coefficient, so as to ensure the alignment accuracy of the multi-layer laminated circuit.

[0019] However, in the actual production process, the temperature and humidity fluctuations caused by environmental factors, especially seasonal changes, will have a significant thermal expansion and contraction effect on the multi-layer ultra-thin, fine line structure of the display driving type PCB substrate, and then affect its overall expansion behavior. This change will directly lead to the alignment deviation and distribution imbalance of the pixel circuit, resulting in color difference, blur, image distortion and other adverse phenomena on the display panel, which seriously affects the display quality of the final product.

[0020] The traditional method does not fully consider the influence of seasonal environmental changes on the expansion characteristics of the material when performing film compensation, resulting in deviation between the compensation coefficient and the actual expansion condition, thereby causing interlayer alignment defects, increasing the scrap rate of PCB products, increasing the manufacturing cost, and affecting the delivery cycle of customers.

[0021] Specifically, the target hole alignment deviation value (Target Registration Deviation) is the core index for measuring the multi-layer interlayer alignment accuracy in PCB manufacturing. For example, in winter, the material shrinks, and the film needs to be pre-stretched. When the temperature rises in spring, the material will expand in the opposite direction, and the pre-stretching will cause the alignment to be too large, that is, the target hole alignment deviation value is biased upward. Conversely, in summer, the material expands at high temperature, and the film needs to be pre-compressed. When the temperature drops in autumn, the material will shrink in the opposite direction, and the pre-compression will cause the alignment to be too small, that is, the target hole alignment deviation value is biased downward.

[0022] To this application proposes a multi-layer ultra-thin fine line display driving board optical point expansion control method, including seasonal compensation rules, its seasonal compensation specifications include winter compensation rules and summer compensation rules. And seasonal compensation rules will use size pre-compensation table, which is prepared according to the seasonal changes and temperature, humidity changes to obtain different seasons of inner film pre-compensation coefficient and prepare the table.

[0023] Please refer to Figure 1 , first into the winter compensation rules of the judgment, the actual application can be according to the seasonal information to determine whether to enable winter compensation rules or summer compensation rules, it is a rule that can be executed in a cycle, in this embodiment will be illustrated with winter compensation rules to start execution. By engineering and technical department according to the size pre-compensation table, the engineering and technical department described here can be the research and development department (R&D Department), process engineering department (Process Engineering Department) , quality management department (Quality Management / Assurance Department) and so on. After production and quality management department according to the photoelectric board (FD-FD) control table production and quality inspection, here the photoelectric board (FD-FD) control table is the control table of the quality of the field manufacturing, which is a common technical means for quality management in manufacturing industry, and is not described in detail in this embodiment.

[0024] In the production process, the production and quality management part judges whether the temperature and humidity show a one-way change trend in the first preset time, whether the daily maximum temperature deviates from the preset temperature range. Here the first preset time can be a week, that is, 7 days, and the preset temperature refers to the average annual temperature of the factory location, such as Zhongshan city as the factory location, the preset temperature is 22℃. The one-way change of temperature and humidity under winter compensation rules is upward trend, and the daily maximum temperature is above 22℃. At this time, continue to execute the next step judgment rule, if not reached, continue to execute according to the winter compensation rules.

[0025] Then, the target hole registration deviation value (Target Registration Deviation) data of the finished product in the factory is judged whether it shows a one-way change trend in the second preset time. Here the second preset time is twice the first preset time, such as the first preset time is 7 days, the second preset time is two weeks, or half a month can be selected as the node. Under the winter compensation rules, the target hole registration deviation value data shows a upward trend. At this time, the seasonal compensation rules are executed, that is, the summer compensation rules, otherwise continue to execute according to the winter compensation rules.

[0026] The summer compensation rule is opposite, the unidirectional change of temperature and humidity is a downward trend, and the unidirectional change of the target hole alignment deviation value data is a downward trend.

[0027] In this way, by introducing a compensation rule based on seasonal information, and combining the double judgment mechanism of temperature and humidity trend and the fluctuation of finished product data in the factory, the intelligent adjustment of the film compensation coefficient is realized. This method not only improves the accuracy and stability of the expansion control, but also effectively reduces the alignment deviation risk caused by seasonal alternation, significantly improves the process consistency and product reliability in the production process.

[0028] As described above, the present application protects the multi-layer ultra-thin fine line display driving board optical point expansion control method, all the same or similar technical solutions should be shown to fall within the scope of protection of the present application.

Claims

1. A method for controlling the expansion and contraction of optical dots on a multi-layer ultra-thin fine-line display driver board, characterized in that, Including seasonal compensation rules, the determination steps are as follows; Step 1: Based on seasonal information, adopt seasonal compensation rules. The winter compensation rules are formulated by the engineering and technical department based on the size pre-layout compensation table. Step 2: The production and quality management departments conduct production and quality inspection according to the optoelectronic board control table; Step 3: Determine whether the temperature and humidity show a unidirectional change trend within the first preset time and whether the daily maximum temperature deviates from the preset temperature range. If yes, proceed to step 4; otherwise, continue according to the rules of step 1. Step 4: Determine whether the alignment deviation data of the finished product target hole in the factory within the second preset time period shows a unidirectional trend. If so, execute the seasonal compensation rule; otherwise, continue to execute according to the rule in Step 1.

2. The method for controlling the expansion and contraction of optical dots in a multi-layer ultra-thin fine-line display driver board as described in claim 1, characterized in that, The first preset time is 7 days.

3. The method for controlling the expansion and contraction of optical dots on a multi-layer ultra-thin fine-line display driver board as described in claim 2, characterized in that, The second preset time is twice the first preset time.

4. The method for controlling the expansion and contraction of optical dots on a multi-layer ultra-thin fine-line display driver board as described in claim 1, characterized in that, The preset temperature is the local annual average temperature of the factory.

5. The method for controlling the expansion and contraction of optical dots on a multilayer ultra-thin fine circuit display driver board as described in any one of claims 1 to 4, characterized in that, The seasonal compensation rules include winter compensation rules and summer compensation rules.

6. The method for controlling the expansion and contraction of optical dots on a multi-layer ultra-thin fine-line display driver board as described in claim 5, characterized in that, Under the winter compensation rule, the temperature and humidity change unidirectionally with an upward trend, and the target hole alignment deviation data change unidirectionally with an upward trend.

7. The method for controlling the expansion and contraction of optical dots in a multi-layer ultra-thin fine-line display driver board as described in claim 5, characterized in that, Under the summer compensation rule, the temperature and humidity change unidirectionally with a downward trend, and the target hole alignment deviation data change unidirectionally with a downward trend.

8. The method for controlling the expansion and contraction of optical dots on a multi-layer ultra-thin fine-line display driver board as described in claim 5, characterized in that, The winter compensation rule and the summer compensation rule are executed cyclically.

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