Transparent OLED Wall

Answer: The core standard of an A-grade screen is no dead pixels, uniform color, sensitive touch, and no signs of aging. Generally, it can be preliminarily judged through appearance inspection, display testing, and software tools. For specific identification methods, please read the detailed identification methods below:

1、 Inspection of the appearance of the transparent OLED screen

a. Screen surface

• Scratches/Dents: Grade A screens should have a smooth surface without scratches and no bumps or cracks on the edges.
• Fitting process: Check whether the screen and the frame are tightly fitted without any glue overflow or gaps.

b. Display abnormality

• Bad pixels/bright pixels/dark pixels: In a pure black, pure white, red, green, blue or other monochrome background, observe whether there are pixels that are not luminous (dark pixels) or always bright (bright pixels).
• Light leakage: In theory, OLED is completely black when it is not emitting light. If there is whitening or halo when displaying black,

2. Display effect test

a. Color uniformity

• Display a pure color image (such as gray or white) and observe whether the screen has color spots, yellowing, or greening (commonly seen on aging or low-quality screens).
• Compare display consistency at different brightness levels (lowest and highest).

b. Viewing angle

• OLED screens should have wide viewing angles, and the color and brightness should not be significantly attenuated or cast even at a large tilt angle.

c. Image retention/screen burn-in

• After displaying a static image for a long time, switch the screen to observe whether there is any residual image (burn-in). Although A-grade screens may burn in due to aging, obvious residual images in the short term may be a low-quality screen.

3. Software Detection

a. Screen Test Tool

• Use professional apps (such as “Display Tester” and “Screen Test”) to detect dead pixels, touch response, color transitions, etc.
• Use tools such as “Device Info HW” to check the screen manufacturer (such as Samsung, LG, etc.), but please note that some manufacturers may block information.

b. Touch test

• Use the line drawing tool to check whether the touch is sensitive and whether there is any disconnection or failure in the edge area.

4. professional tool assistance

a. Microscope observation

• Check the pixel arrangement through a high-power microscope (such as Samsung Pentile and BOE’s “Zhou Dongyu arrangement”), but professional knowledge is required to determine whether it is consistent with the official specifications.

b. Color Accuracy Tester

• Use a colorimeter (such as SpyderX, X-Rite) to detect color gamut coverage (such as sRGB, DCI-P3), color accuracy (ΔE value), and other parameters. Grade A screens usually have a ΔE<3.

5. Brand and channel verification

a. Original certification

• For new devices, you can check the serial number through official channels to confirm whether the screen is an original accessory.
• For second-hand or replacement screens, pay attention to whether they are marked “original grade A”, but be wary of false advertising by merchants.

b. Purchase channels

• Give priority to official brand stores, authorized dealers, or reputable platforms to avoid low-price traps (screens that are significantly lower than the market price are high-risk).

6. Warranty and After-sales Service

• Warranty label: Original A-grade screens usually have official warranty labels or anti-counterfeiting codes(eg, Figure 1).
• After-sales policy: Screens purchased through formal channels generally come with a warranty of more than 1 year and support returns and exchanges for quality issues.

Figure 1