显示器常见问题

接口

• LVDS - Low Voltage Differential Signaling 40Pin
  • 低压差分信号
  • 330mV, min 250mV, max 450mV
  • 100Mbps - 1Gbps
  • 专用于视频传输
• eDP - Embedded Display Port 30Pin
  • 基于 DisplayPort 架构和协议
  • DP 内部接口
  • 平板电脑、笔记本电脑
• Vbyone
• MiniLVDS
• MIPI 12/25/30PIN 31/34/39/40PIN 45/50/60PIN
• 8bit\10bit, VASA, JEIDA
• 60Hz、120Hz、240Hz
• 4 路、8 路、16 路 V-by-One（30/60/120Hz）信号

-	eDP	LVDS
Data line	1-4 pairs of data lines	More data lines
Clock line	No	Yes
Bit rate/pair	1.6,2.7,5.4Gbps	945Mbps
Total capacity	1.6-21.6Gbps	7.56Gbps
Clock	Embedded	clock line/channel
Transmission type	video, audio, data, extensible formats	Uncompressed video signal
Two way data channel	1Mbps, 720Mbps	100kbps
Channel coding	ANSI 8B/10B	Serialized at 7x pixel clockrate
Content protection	HDCP	None

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• https://cjscope2016.pixnet.net/blog/post/69757737
• http://www.auo-lcd.com/solution/98.html

LCD 背板类型

• IPS
• TN
• VA
• TFT

LED 背板类型

LED 也是 LCD, 只是背光不同

• LED
• OLED

IPS vs TN vs VA

• IPS
  • Pros
    • Outstanding color accuracy and consistency
    • Maximum available viewing angles
    • Response times sufficient for most users
    • Virtually eliminates color/contrast shift seen with some VA displays
  • Cons
    • Below average static contrast ratio
    • Potential white glow from off-angles when viewing dark content. Usually only an issue with lower-end & off-brand IPS monitors
    • More motion blur than a TN monitor
    • IPS Monitor Best Uses:
  • When
    • Color-critical professional applications
    • Technology enthusiasts
    • Higher-level business/home use
    • Gamers who value image quality over response time
• TN
  • Pros
    • Rapid response time
    • Lower price
    • Sufficient contrast for most business/general purpose use
    • TN Monitor Drawbacks:
  • Cons
    • Most restrictive viewing angles, especially in vertical plane
    • Not recommended for color-critical applications
  • When
    • Gaming
    • Entry-level
    • General use
• VA - P-MVA, S-MVA, AMVA (Advanced MVA).
  • Pros
    • Maximum available viewing angles
    • High contrast ratios
    • Response times sufficient for most users
    • Mid-range to high-end pricing options
  • Cons
    • Response times slower than TN
    • Off-center contrast shift with some models
    • VA Monitor Best uses:
  • When
    • Movies
    • Photography/Videography
    • Content creation
    • Home use
    • Gamers who value image quality over response time
• OLED
• LCD
  • 使用背光 - 可能发光有误
  • 动态图像模糊
• OLED
  • 主动 - 避免屏幕发光 - 黑色更黑
  • 比 LCD 更贵
• CRT
• TFT

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• 参考
  • https://www.viewsonic.com/library/photography/what-is-an-ips-monitor-panel/

DCR

• Dynamic Contrast Ratio
• 对比度优化技术，自动判断画面整体亮度, 通过减弱较暗区域亮度,有效地对不同色阶层次精准还原，使画面细节更清晰,层次更分明。