BRUIT EMI NUMÉRISEUR — PRÉCISION VECTORIELLE RMS

Inspecteur de Bruit EMI du Chargeur et Touches Fantômes

Votre écran réagit-il de manière erratique pendant la charge ? Branchez votre chargeur et tracez une ligne pour mesurer le bruit subpixel RMS généré par une alimentation non isolée.

詳細メトリクス

理想的な直線ベクトルに対するデジタイザのRMSノイズ・ブレを測定。

RMS Jitter Deviation0.0 px

Max Peak Deviation0.0 px

Precision Scoreキー入力待機中...

診断プロトコル

ディスプレイテストの実施手順 (01, 02, 03)

準備

画面の汚れを拭き取り、環境光自動調整をオフにして、ネイティブ解像度と最大リフレッシュレートに設定します。

実行

全画面モード (F11) に切り替え、コントロールバーを使って各種テストパターンを順に表示します。

評価

部屋を暗くし、異なる視野角からムラやドット抜け、残像を観察してガイドと照合します。

ハードウェアアーキテクチャ

液晶・有機ELパネル技術の比較

プロフェッショナルIPS (In-Plane Switching)

卓越した色再現性と視野角。リファレンスモニターに最適。暗所でのわずかなIPSグローが発生する場合があります。

ゲーミングIPS (Fast IPS / Nano IPS)

ゲーミング向けの高速リフレッシュレートと応答速度。ただしVAと比較して静的コントラスト比は控えめです。

VAパネル (Vertical Alignment)

引き締まった深みのある黒と高コントラスト (3000:1+)。湾曲モニターに多い一方、暗所での黒残像に注意が必要です。

OLED (有機EL) ＆ QD-OLED

自発光ピクセルによる完全な漆黒、超高速応答、無限のコントラスト。自動輝度制限 (ABL) の影響を受けます。

PHYSIQUE DU BRUIT DU CHARGEUR & MASSE CAPACITIVE

Comprendre les Interférences Électromagnétiques (EMI) Tactiles

Les dalles capacitives émettent des signaux AC haute fréquence sur une grille d'électrodes ITO. Un chargeur bas de gamme transmet le bruit de découpage (100kHz–1MHz) à la masse.

Alimentation Batterie (Signal Propre)

Masse continue stable. Le rapport signal/bruit élevé produit des tracés parfaits avec une erreur RMS inférieure à 1,0px.

Chargeur Non Isolé (Forte EMI)

L'ondulation AC perturbe les capteurs capacitifs, provoquant oscillations de tracé ou fausses activations.

OPTOMETRIC ERGONOMICS & NON-MEDICAL NOTICE

Display Test Online is an engineering calibration utility for electronic visual displays (LCD, OLED, QD-OLED, MicroLED) and mobile touch digitizers. This software is NOT a medical eye exam, optometric vision test, or diagnostic health utility.

To reduce Digital Eye Strain (DES) during display calibration, apply optometric ergonomics:

The 20-20-20 Rule: Every 20 minutes, look at an object at least 20 feet away for 20 seconds.
Ambient Illumination: Ensure room ambient lighting matches display brightness levels (~100–150 nits for standard SDR workloads).
Optimal Viewing Distance: Place your screen approximately 20 to 30 inches (50–75 cm) from your eyes.

Technical FAQs & Helpful Content

FAQ sur les Interférences EMI et Touches Fantômes

この診断機器、校正手順、ディスプレイ技術規格について知っておくべきすべての情報。

01.Why does my phone screen click by itself or jump around when charging?

Inexpensive or unshielded third-party wall chargers inject Electro-Magnetic Interference (EMI) ripple noise into your device ground plane. This disrupts mutual capacitive sensor measurements, causing ghost touches or line jitter.

02.How does the Charger EMI Noise Inspector test work?

Plug your phone into your charger and draw a straight line between the vector targets. Our engine measures Root Mean Square (RMS) subpixel deviation from an ideal straight line to quantify power supply ripple noise.

03.What is Root Mean Square (RMS) line noise deviation?

RMS measures average spatial displacement of drawn points away from a straight vector line. RMS values below 1.5px indicate clean power filtering; values above 4.0px flag severe charger EMI noise.

04.Can an AC adapter or cable damage my touchscreen digitizer permanently?

Continuous exposure to severe high-voltage AC ripple can cause thermal stress or voltage breakdown on delicate Indium Tin Oxide (ITO) digitizer traces and touch controller ICs.

05.Why does touch noise disappear when unplugging the charger?

When running on battery power, your device operates on a clean DC ground reference without AC ground loop ripple or switching power supply high-frequency noise.

06.How do I fix ghost touches while charging?

Use an OEM (Original Equipment Manufacturer) USB-C charger with proper isolation transformers, test a different wall outlet, or replace low-quality unshielded charging cables.

07.Does thick screen protector glass increase charger noise susceptibility?

Yes. Screen protectors increase physical distance between your finger and the capacitive ITO grid, weakening signal-to-noise ratio (SNR) and amplifying background EMI distortion.

08.What is the difference between mutual capacitance and self capacitance?

Self-capacitance measures individual electrode pin charges to ground; mutual capacitance measures coupling between intersecting row and column electrodes for multi-touch tracking.

09.Can laptop trackpads also suffer from charger ground loop jitter?

Yes. Ungrounded (2-prong) laptop power bricks frequently cause mouse cursor stutter, erratic jumps, or unresponsiveness on capacitive trackpads.

10.Is this test safe for mobile OLED and LCD displays?

Yes. 100% safe, client-side HTML5 canvas evaluation using standard W3C PointerEvents without requesting elevated hardware permissions.

次にどのテストを行うべきかお困りですか？トラブルシューティングが必要ですか？

総合診断ガイドを読む →

PASS

SIGNAL D'ALIMENTATION PUR

Évaluation EMI Boucle de Masse

98/100

Bruit RMS0.74 px

Touches Fantômes0

Télémetrie de Bruit EMI

Lecture du Signal Capacitif

AC Ripple

Erreur de Bruit RMS

0.74px

Target: < 1.5 px

0%12%100%

Touches Fantômes

0events

Rapport Signal/Bruit

42.8dB

Configuration Alimentation

Profil & Filtrage Électrique

Controls

État de l'Alimentation

Contrôle Ondulation AC

Alimentation à Découpage

Hardware HID

Boucle de Masse ACIsolated

Bruit de Découpage100 kHz - 1 MHz

Niveau de BlindageClass II Isolated

Shortcuts

Keyboard Navigation

Hotkeys

F

Basculer Plein Écran

R

Réinitialiser Tracé

TV users can navigate with D-Pad & Remote arrow keys