What are the effects of 4.3-inch LCD screen resolution on display performance?
4 3 inches is a relatively small screen size, and the choice of resolution directly affects multiple aspects of
4.3 inches is a relatively small screen size, and the choice of resolution directly affects multiple aspects of its display effect.
Simply put, with a fixed screen size of 4.3 inches, the higher the resolution, the finer and better the display effect. But its impact is multidimensional, as follows:
1. Core impact: Clarity and Precision (PPI)
This is the most direct impact. The clarity is determined by PPI (number of pixels per inch).
Calculation formula: PPI=√ (horizontal pixels ²+vertical pixels ²)/screen diagonal size (inches).
Example comparison:
Resolution 480 x 272 (commonly seen in old navigation systems) MP4）：PPI ≈ 128。 The pixels are relatively coarse, with a noticeable "graininess" and jagged edges on the text.
Resolution 800 x 480 (formerly the mainstream high-definition standard for 4.3-inch screens): PPI ≈ 217. The clarity has been greatly improved, the graininess has basically disappeared, and the text display is sharp.
Resolution 960 x 540 (QHD) or higher: PPI>250. Reaching the level of "retina" (pixels that are difficult for the naked eye to distinguish at normal viewing distance), the display effect is extremely delicate.
Conclusion: The higher the PPI, the smoother the edges of images and text, the richer the details, and the more comfortable the viewing experience.
2. Content display capability
How much content to display: High resolution screens can display more text, icons, or table rows on the same screen. For example, when browsing web pages, 800x480 can see more content and reduce the number of scrolling times compared to 480x272.
Detail presentation: High resolution can better present the details of complex images, such as the names of small streets on the map and the texture of photos.
3. Compatibility and scaling
Low resolution screen displays high-definition content: If the screen resolution is low (such as 480x272), when playing high-definition videos or displaying high-resolution images, the system needs to first compress (downsample), resulting in loss of details, blurring, and inability to leverage the advantages of the source.
High resolution screen displays low definition content: When displaying low resolution content, pixels are either centered (the screen becomes smaller with black borders around) or stretched and enlarged, resulting in blurring. Modern systems/software typically have good scaling algorithms to alleviate this issue, but native matching content performs the best.
4. Requirements for hardware and cost
GPU performance: The higher the resolution, the more pixels the GPU needs to render, which increases by the square. To ensure smooth operation of the system, especially the graphical interface and games, stronger graphics processing capabilities are required, otherwise lagging may occur.
System bandwidth and memory: Higher frame buffers require larger memory bandwidth and capacity.
Cost: The manufacturing cost of high-resolution panels is higher, and it may indirectly increase the cost of related chips and batteries (if the brightness remains unchanged, driving more pixels will slightly increase the power consumption).
Common resolution levels and their effectiveness evaluation (for 4.3-inch screens)
Resolution | Abbreviation/Common name | About PPI | Display effect evaluation | Common application era/field |
480 x 272 | WQVGA | ~128 | Basic effect, obvious graininess, jagged text, outdated. | Early MP4, car DVD, low-end industrial control equipment |
800 x 480 | WVGA | ~217 | Mainstream clarity, no obvious graininess to the naked eye, clear text, high cost-effectiveness. | Mainstream MP5, portable navigation, mid-range driving recorder in the 2010s |
960 x 540 | QHD | ~256 | Very delicate, close to the "retina" standard, with excellent results. | High end portable devices and some industrial instruments in the later stage |
1280 x 720 | HD/720p | ~342 | Extremely delicate, belonging to the ultra-high specification at 4.3 inches, with excellent display effect. | High end specialized equipment and fields with extremely high requirements for details |
Summary and Recommendations
For a 4.3-inch LCD screen:
Resolution is the first factor that determines display precision. If budget and hardware allow, choosing a higher resolution screen can result in a qualitative improvement.
800x480 is an important watershed, as it provides a good basic experience and is currently one of the most cost-effective choices in this size.
When choosing, it is necessary to consider the purpose comprehensively:
Display static text, simple UI (such as industrial control): 800x480 is sufficient.
Watching videos, browsing pictures, and car navigation: It is recommended to choose a resolution of 960x540 or higher for a much better experience.
View high detail drawings, high-end monitoring and other professional fields: pursue 720p or even higher.
In the end, "4.3 inches" only determines the screen size, while "resolution" truly determines how clear the world can fit on this small screen.
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AUO 4.3-inch LCD screen：https://www.idtdisplay.com/products/AUO_LCD_Displays/4-3inch/
