CROSS REFERENCE TO RELATED APPLICATIONS

This application claims priority to, and the benefit of, International Application No. PCT/CN2019/106311, filed on Sep. 18, 2019, which claims priority to, and the benefit of, Chinese Application No. 201910670266.X, filed on Jul. 24, 2019. The entire disclosures of each of the above applications are incorporated herein by reference.

1. FIELD OF DISCLOSURE

The present invention relates to liquid crystal displays and in particular, to an alerting method and an alerting device for monitoring a color shift of a liquid crystal display panel.

2. DESCRIPTION OF RELATED ART

A charge coupled device (CCD) is a photoelectric conversion device with advantages such as small size, high sensitivity, low noise, fast reading speed, a high dynamic range and full spectrum response. CCD has been widely used in image sensing and non-contact measurement, monitoring, and other fields. In conventional manufacturing processes of liquid crystal displays (LCDs), CCD monitoring technology is used to detect whether RGB color resists have a color shift. However, due to the fact that CCD driving methods have shortcomings, such as difficulty in adjustments and poor flexibility, it is often impossible to obtain a reminder of abnormality, so an on-site technician is unable to adjust process parameters in real time. As a result, it is hard to improve production yields for RGB color resists and display quality. Therefore, related monitoring technologies are not good.

SUMMARY

In conventional manufacturing processes of liquid crystal displays (LCDs), it is detected by CCD monitoring technology whether RGB color resists have a color shift. However, due to the fact that CCD driving methods have shortcomings, such as difficulty in adjustments and poor flexibility, it is often impossible to obtain a reminder of abnormality, so a technician is unable to adjust process parameters in real time. As a result, it is hard to improve production yields for the RGB color resists and display quality. Therefore, related monitoring technologies are not good.

It is an objective of the present invention to provides an alerting method for monitoring a color shift of a display panel, thereby improving a technique of monitoring a pixel color shift, and effectively improving quality of the display panel and production yields of RGB color resists.

Accordingly, the present invention provides an alerting method for monitoring a color shift of a display panel, comprising:

step S10: generating a grayscale waveform diagram for an entire frame according to a normal pixel pattern of the display panel, wherein the grayscale waveform diagram has a plurality of waveform setting values;

step S20: generating a grayscale waveform diagram for an entire frame according to a pixel pattern of a display panel to be tested, wherein the grayscale waveform has a plurality of waveform reference values; and

step S30: obtaining a predetermined difference value between each of the waveform reference values and each of the waveform setting values, wherein an alerting message is sent out when the predetermined difference value exceeds a specified value.

According to one embodiment of the present invention, in step S30, the waveform setting values comprise a plurality of wave width setting values and a plurality of wave height setting values, the waveform reference values comprise a plurality of wave width reference values and a plurality of wave height reference values, and the alerting message is an alarm sound or a reminder displayed on a screen.

According to one embodiment of the present invention, the predetermined difference values are obtained by comparing each of the wave width setting values and each of the wave width reference values and by comparing each of the wave height setting values and each of the wave height reference values, wherein an alerting message is sent out when any of the predetermined difference values exceeds a specified value.

According to one embodiment of the present invention, the alerting method further comprises obtaining a difference value between each two adjacent wave width reference values or each two adjacent wave height reference values, wherein the alerting message is sent out when the difference value exceeds a specified value.

According to one embodiment of the present invention, in step S10and step S20, the alerting method further comprises generating, by a monitoring member, each of the grayscale waveform diagrams; the monitoring member comprises an imaging assembly and a procedure module stored in the imaging assembly; and according to the grayscale waveform diagrams of the display panel or the display panel to be tested, the imaging assembly automatically generates the waveform setting values or the waveform reference values by a software module.

According to one embodiment of the present invention, the imaging assembly comprises a light source and a charged coupled device (CCD) connected to the light source, the CCD receives reflected light from the light source, and the software module obtains the waveform setting values or the waveform reference values according to the reflected light.

According to one embodiment of the present invention, the alerting method further comprises step S40: when the alerting message is sent out, shutting down a machine, determining a color-shift abnormal type, and adjusting a corresponding processing parameter, wherein the color-shift abnormal type includes a pixel color-loss type or a pixel color-shift type.

According to one embodiment of the present invention, a horizontal axis of the grayscale waveform diagram indicates a distance, a vertical axis of the grayscale waveform diagram indicates brightness, the grayscale waveform diagram further comprises a plurality of waveforms and a pixel pitch connected between the waveforms, each of the waveforms is a square wave, and brightness of each pixel pitch is close to zero.

Furthermore, the present invention provides an alerting device for monitoring a color shift of a display panel, comprising use of the above-mentioned alerting method for monitoring the color shift of the display panel.

According to one embodiment of the present invention, the waveform setting values comprise a plurality of wave width setting values and a plurality of wave height setting values, the waveform reference values comprise a plurality of wave width reference values and a plurality of wave height reference values, and the alerting message is an alarm sound or a reminder displayed on a screen.

According to one embodiment of the present invention, the predetermined difference values are obtained by comparing each of the wave width setting values and each of the wave width reference values and by comparing each of the wave height setting values and each of the wave height reference values, wherein an alerting message is sent out when any of the predetermined difference values exceeds a specified value.

According to one embodiment of the present invention, the alerting method further comprises obtaining a difference value between each two adjacent wave width reference values or each two adjacent wave height reference values, wherein the alerting message is sent out when the difference value exceeds a specified value.

According to one embodiment of the present invention, the alerting method further comprises generating, by a monitoring member, each of the grayscale waveform diagrams; the monitoring member comprises an imaging assembly and a procedure module stored in the imaging assembly; and according to the grayscale waveform diagrams of the display panel or the display panel to be tested, the imaging assembly automatically generates the waveform setting values or the waveform reference values by a software module.

According to one embodiment of the present invention, the imaging assembly comprises a light source and a charged coupled device (CCD) connected to the light source, the CCD receives reflected light from the light source, and the software module obtains the waveform setting values or the waveform reference values according to the reflected light.

According to one embodiment of the present invention, when the alerting message is sent out, shutting down a machine, determining a color-shift abnormal type, and adjusting a corresponding processing parameter, wherein the color-shift abnormal type includes a pixel color-loss type or a pixel color-shift type.

According to one embodiment of the present invention, a horizontal axis of the grayscale waveform diagram indicates a distance, a vertical axis of the grayscale waveform diagram indicates brightness, the grayscale waveform diagram further comprises a plurality of waveforms and a pixel pitch connected between the waveforms, each of the waveforms is a square wave, and brightness of each pixel pitch is close to zero.

Advantages of the Present Invention

The present invention also provides the following functions: users can set the wave width setting values and the wave height setting values by means of the software module of the monitoring member, thus facilitating adjustment, improving sensitivity, and effectively detecting abnormality of color resists. Therefore, the present invention can effectively provide alerting massages/reminders displayed on a screen, so that an on-site personnel can adjust process parameters in real time, and improve production yields of RGB color resists and display quality.

