Mytechsun Monitors Warranty Policy

Mytechsun Display Pixel Guidelines

This article provides information about Mytechsun's display resolution guidelines for LCD panels of Mytechsun monitors. Learn what a dot or pixel is, what the Premium Panel Exchange is, how to identify a bright or dead pixel on the LCD panel and more

1. The pixel identify:

A pixel, short for picture element, is a single point in a graphic image. LCD devices display images by dividing the display screen into thousands (or millions) of pixels, arranged in rows and columns. The pixels are placed close together so that they appear connected. A full pixel is a combination of one red, one green, and one blue subpixel.

 

2. Mytechsun use a Panel grade: Grade A with the Dot pixel: 8(033):2(335)

A full-pixel defect is a bright white dot or a noticeable black dot on the display.

a. A bright pixel defect is where the red, green, and blue subpixels are all permanently on. It is always visible as a white dot on the display.

b. Dark pixel defect is where the red, green, and blue subpixels are all permanently off. It is always visible as a black dot on the display.

A subpixel defect is also called as a dot effect.

a. Bright dot subpixel defects are permanently on, displaying a red, green, or blue dot.

b. Dark dot subpixel defects are permanently off, always displaying a black dot on the display.

During the LCD manufacturing process, it is not uncommon for one or more subpixels to get into an unchanging state, causing a bright or dead pixel. A display with 1 to 5 fixed subpixels is considered normal and within industry standards.

 

3. Mytechsun Pixel Policy: Number of subpixel defects allowed on monitos is Up to 5 allowed

3.1. The distance between the LCM and the inspector’s eyes shall be at least30-50㎝.

_ Inspection time for each AIO is 5-10 seconds (both for panel checking and AIO appreance checking). If can not see within 5-10 seconds, the product was passed.

_ Ambient conditions: a. Temperature: 25±5 ℃; b. Humidity : 65 ±10% RH: c. Illumination: Under Normal office lighting(300 ~ 1000 Lux)

3.2. Viewing Angle

  The inspection shall be conducted within normal viewing angle range

3.3. Bright Dot

Dots (sub-pixels)which appeared brightly in the screen when the LCM displayed with dark pattern.

3.4. Dark Dot

Dots (sub-pixels) which appeared darkly in the screen when the LCM displayed with bright pattern.

3.5. Line Defect

All kinds of line defects such as vertical, horizontal or cross are not allowed.

3.6. All Mura like a stain on the screen are not allowed. The level of mura is determined by both parties, Customer and Supplier.

 

4. Mytechsun warranty: All monitors warranty 36 month (Based on invoce, the invoice from Mytechsun Hub & distribution by distributors)

 

Content no.			AAA 033	AA 335	inspection pattern.	remark
1	bright dot	1 dot	0	3	dark pattern	a. Every dot herein means Sub-Pixel (Each Red,Green, or Blue Color) b. Damaged less than half size of sub-pixel is not counted as defect c. Dots darker than half brightness of sub-pixel are not defined as bright dot defect and dots brighter than half brightness of sub-pixel is not defined as dark dot defect. d. W : Width L : Length D : Average diameter =(a+b)/2
2	Dark Dot	1 dot	3	3	white&red /green/blue pattern
3	Adjacent dots（Minimum distance of dots: 10mm ）	Adjacent 2 dots (10MM）	N≤1	N≤2
		Adjacent 3 dots (10MM）	0	0
		Adjacent 4 dots (10MM）	0	0
		Adjacent 5 dots (10MM）	0	0
4	Total amount of Dot Defects		N≤3	N≤5
5	minor dot		No dots be found should be OK (inspect within 5 seconds.)
6	Dent		0	D≤2.0mm，N≤2
7	Mura		Should not be found through 6% ND,or determined by both parties	Should not be found through 3% ND,or determined by both parties	50% gray pattern
8	Foreign Material,Scratches,Bubble	Circular	0.2mm≤D≤0.5mm, N≤1 0.5mm < D, N=0; (D <0.2mm, Disregarded )	0.2mm≤D≤0.6mm, N≤2 (distance no less than 10mm); 0.6mm < D, N=0;
		Linear	W≤0.05mm,L≤2mm,N≤2; (distance no less than 15 mm； W<0.05mm and L<2mm, Disregarded.)	0.05≤W≤0.07mm or 3.0mm≤L≤10mm, N≤3; (0.07mm

 

Commitment from Mytechsun:                                                                             

 

1. 1% free PCB borad & adapter, 1% packing materials as Spare parts when shipment to Mytechsun hub                                                                       

2. During the warranty period, if panel quality problem, we can send replaced panel or monitor with next shipment.                                                             

3. If any quality problem, you can fill out our RMA report, our CS manager will get back to you in 1 day.                                                                  

                                                                                         

How to identify a bright dot or bright subpixel?                                                                              

1. Turn off the computer and the monitor.                                                                                       

2. Disconnect the video cable (VGA, DVI, HDMI, or DisplayPort) from the Mytechsun monitor.                                                                                         

3. Clean the screen with a lint-free cloth, as dust may be the spot that is seen.                                                                                

4. Connect the power cable to the Mytechsun monitor and turn on the monitor.                                                                             

5. A floating box on a black background is displayed.                                                                                   

6. Inspect the screen for bright subpixels. These subpixels are turned on resulting in a white, red, green, or a blue dot on a black background. Alternatively, consider running a diagnostic test.                                                                                 

7. Inspect the screen for bright dots or bright subpixels, or any other type of distortion on the screen.                                                                                    

8. If you notice a defect, contact the Mytechsun Technical Support or your local Mytechsun Distribution for repair options in your location.