{"id":1187,"date":"2026-01-30T17:44:51","date_gmt":"2026-01-30T09:44:51","guid":{"rendered":"https:\/\/glowinled.com\/?p=1187"},"modified":"2026-01-30T17:44:51","modified_gmt":"2026-01-30T09:44:51","slug":"how-to-test-stability-of-high-density-dotless-cob-led-strips-at-different-bending-angles","status":"publish","type":"post","link":"https:\/\/glowinled.com\/fr\/how-to-test-stability-of-high-density-dotless-cob-led-strips-at-different-bending-angles\/","title":{"rendered":"Comment tester la stabilit\u00e9 des bandes LED COB sans points \u00e0 haute densit\u00e9 \u00e0 diff\u00e9rents angles de flexion"},"content":{"rendered":"

\n \"Technicien\n<\/p>\n

Nous rencontrons souvent des clients qui sont frustr\u00e9s par bandes LED<\/a> qui \u00e9chouent peu de temps apr\u00e8s leur installation dans des corniches architecturales courbes. Il est d\u00e9courageant de voir un projet magnifiquement con\u00e7u compromis par des lumi\u00e8res clignotantes ou des taches sombres simplement parce que les limites physiques du produit n'ont pas \u00e9t\u00e9 v\u00e9rifi\u00e9es au pr\u00e9alable. Ces d\u00e9faillances proviennent g\u00e9n\u00e9ralement d'un manque de tests de stabilit\u00e9 rigoureux lors de la phase d'approvisionnement.<\/p>\n

Pour tester bande LED COB<\/a> la stabilit\u00e9, fixez la bande dans un \u00e9tat aliment\u00e9 et effectuez des cycles de flexion r\u00e9p\u00e9t\u00e9s avec un rayon minimum sp\u00e9cifi\u00e9 par le fabricant (g\u00e9n\u00e9ralement 30-50 mm). Surveillez simultan\u00e9ment les chutes de tension, le clignotement ou les anomalies thermiques \u00e0 l'aide d'une cam\u00e9ra thermique, car ceux-ci indiquent un stress interne sur le PCB ou des fractures de joints de soudure.<\/strong><\/p>\n

Pour vous aider \u00e0 \u00e9viter ces d\u00e9faillances co\u00fbteuses sur site, explorons les protocoles de test sp\u00e9cifiques que nous utilisons pour garantir que nos produits r\u00e9sistent aux contraintes d'installation dans le monde r\u00e9el.<\/p>\n

Quel est le rayon de courbure minimum que je dois tester pour les bandes LED COB ?<\/h2>\n

Lorsque nous collaborons avec des concepteurs d\u2019\u00e9clairage sur des projets de r\u00e9novation complexes, la question la plus fr\u00e9quente concerne la flexion maximale que les bandes peuvent supporter autour des coins. Pousser une bande au-del\u00e0 de sa tol\u00e9rance physique est la principale cause de dommages invisibles qui se manifestent par une d\u00e9faillance quelques semaines plus tard.<\/p>\n

Le rayon de courbure minimum s\u00e9curis\u00e9 pour les bandes COB haute densit\u00e9 standard est g\u00e9n\u00e9ralement de 50 mm, bien que des mod\u00e8les ultra-flexibles sp\u00e9cialis\u00e9s puissent supporter jusqu\u2019\u00e0 5 mm. Vous devez v\u00e9rifier cela en pliant la bande autour d\u2019un gabarit cylindrique tout en v\u00e9rifiant la fissuration du phosphore ou la s\u00e9paration des traces de cuivre.<\/strong><\/p>\n

\"\"<\/p>\n

Comprendre les limites physiques de la technologie COB<\/h3>\n

Dans notre exp\u00e9rience d\u2019approvisionnement d\u2019\u00e9clairage de qualit\u00e9 projet<\/a>, il existe une diff\u00e9rence significative entre ce qu\u2019un fiche technique affirme et ce qui est s\u00fbr pour une installation \u00e0 long terme. Bien que la technologie Chip-on-Board (COB) offre une flexibilit\u00e9 sup\u00e9rieure par rapport aux bandes SMD traditionnelles car elle \u00e9limine le c\u00e2blage en or vuln\u00e9rable, le Circuit Imprim\u00e9 (PCB)<\/a> lui-m\u00eame a des limites physiques.<\/p>\n

La plupart des bandes COB haute densit\u00e9 standard (320-480 LED\/m) sont construites sur un PCB flexible \u00e0 double couche. Lorsque vous pliez ce PCB, la couche ext\u00e9rieure (traces de cuivre) s\u2019\u00e9tire tandis que la couche int\u00e9rieure se comprime. Si le rayon est trop serr\u00e9 \u2014 sp\u00e9cifiquement en dessous de 30 mm pour les mod\u00e8les standard \u2014 les traces de cuivre peuvent se fracturer. Nous recommandons de tester vos bandes avec un cylindre gradu\u00e9 pour d\u00e9terminer le point de d\u00e9faillance exact.<\/p>\n

La r\u00e8gle de marge de s\u00e9curit\u00e9<\/h3>\n

Nous conseillons toujours \u00e0 nos distributeurs d\u2019appliquer une marge de s\u00e9curit\u00e9. Si un fabricant affirme un rayon de courbure minimum de 20 mm, vous devriez baser vos conceptions d\u2019installation sur un rayon de 30 mm. Nos donn\u00e9es internes montrent que les panneaux pli\u00e9s \u00e0 30-40 mm au-dessus du rayon minimum pr\u00e9sentent une meilleure long\u00e9vit\u00e9.<\/p>\n

Voici un tableau de r\u00e9f\u00e9rence que nous utilisons pour cat\u00e9goriser les capacit\u00e9s de flexion :<\/p>\n\n\n\n\n\n\n\n\n
Type de bande<\/th>\nPoids de cuivre sur PCB<\/th>\nSp\u00e9cification du fabricant (typique)<\/th>\nRayon de test s\u00e9curis\u00e9 recommand\u00e9<\/th>\n<\/tr>\n<\/thead>\n
COB standard<\/strong><\/td>\n2oz<\/td>\n30mm (1,18\")<\/td>\n50mm (2\")<\/strong><\/td>\n<\/tr>\n
COB haute puissance<\/strong><\/td>\n85g - 113g<\/td>\n50mm (2\")<\/td>\n60-80mm (2,5\"-3\")<\/strong><\/td>\n<\/tr>\n
Ultra-flexible<\/strong><\/td>\n57g (sp\u00e9cialis\u00e9)<\/td>\n5mm (0,2\")<\/td>\n10mm (0,4\")<\/strong><\/td>\n<\/tr>\n
PCB large (12mm+)<\/strong><\/td>\n85g<\/td>\n60mm (2,4\")<\/td>\n80mm (3,1\")<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Test pour les pliages \"\u00e0 usage unique\" vs. \"r\u00e9p\u00e9t\u00e9s\"<\/h3>\n

Il est crucial de faire la distinction entre une installation statique et une installation dynamique. Une bande pourrait survivre \u00e0 un seul pliage jusqu'\u00e0 10mm lors de l'installation, mais si cette bande est d\u00e9plac\u00e9e ou ajust\u00e9e, la fatigue du m\u00e9tal s'accumule instantan\u00e9ment. Pour les tests, nous sugg\u00e9rons d'effectuer au moins 10 cycles de pliage et de redressement \u00e0 votre rayon cible. Si la bande clignote ou si la r\u00e9sistance change, ce rayon est trop serr\u00e9 pour une utilisation fiable.<\/p>\n

Comment d\u00e9tecter les micro-fissures dans le PCB apr\u00e8s les tests de pliage ?<\/h2>\n

Dans notre laboratoire de contr\u00f4le qualit\u00e9, nous avons appris que se fier uniquement \u00e0 l'\u0153il nu est une recette pour le d\u00e9sastre. Nous avons vu d'innombrables lots o\u00f9 la bande semblait parfaite visuellement mais \u00e9chouait de mani\u00e8re intermittente une fois install\u00e9e, g\u00e9n\u00e9ralement en raison de fractures microscopiques qui ne se d\u00e9connectent que lorsque la bande chauffe.<\/p>\n

La d\u00e9tection des micro-fissures n\u00e9cessite une combinaison de grossissement et de tests \u00e9lectriques. Utilisez un microscope 50x pour inspecter les joints de soudure \u00e0 la recherche de fractures en filigrane, et employez un multim\u00e8tre \u00e0 4 fils pour identifier les pics d'imp\u00e9dance lors du mouvement de flexion, ce qui indique des traces de cuivre compromises.<\/strong><\/p>\n

Techniques d'inspection visuelle<\/h3>\n

La premi\u00e8re ligne de d\u00e9fense en usine est la microscopie \u00e0 haute amplification inspection visuelle<\/a>. Apr\u00e8s avoir effectu\u00e9 un test de flexion, nous pla\u00e7ons le point de flexion critique \u2014 g\u00e9n\u00e9ralement la zone entre deux puces LED ou pr\u00e8s de la marque de coupe \u2014 sous un microscope num\u00e9rique avec au moins 50x d'amplification.<\/p>\n

Nous recherchons deux types sp\u00e9cifiques de dommages :<\/p>\n

    \n
  1. Fissures dans le joint de soudure :<\/strong> M\u00eame dans les bandes COB, le collage flip-chip peut se d\u00e9tacher si le PCB se plie trop brusquement. Cela appara\u00eet sous la forme d'une petite fissure en filigrane \u00e0 la base de la puce.<\/li>\n
  2. Craquelures de phosphore :<\/strong> La couche continue de phosphore jaune phosphore<\/a> sur une bande COB est cassante. Si vous voyez des \"craquelures\" (un r\u00e9seau de fines fissures) \u00e0 la surface, cela indique que la couche de silicone et de phosphore a \u00e9t\u00e9 \u00e9tir\u00e9e au-del\u00e0 de sa limite \u00e9lastique. Cela entra\u00eenera \u00e9ventuellement un d\u00e9calage de la Temp\u00e9rature de Correlation de Couleur (CCT), rendant la lumi\u00e8re bleut\u00e9e ou in\u00e9gale.<\/li>\n<\/ol>\n

    Diagnostics \u00e9lectriques avanc\u00e9s<\/h3>\n

    Les images ne racontent qu'une moiti\u00e9 de l'histoire. Les fissures les plus dangereuses sont celles \u00e0 l'int\u00e9rieur des couches de cuivre du PCB. Pour d\u00e9tecter celles-ci, nous utilisons un test \u00e9lectrique dynamique.<\/p>\n

    Au lieu de simplement mesurer la r\u00e9sistance avant et apr\u00e8s la flexion, nous surveillons la r\u00e9sistance pendant<\/em> le processus de flexion. Nous connectons la bande \u00e0 un ohmm\u00e8tre ou un multim\u00e8tre pr\u00e9cis. Lorsqu'on plie la bande \u00e0 son rayon de test, nous observons l'affichage. Une lecture stable est bonne. Cependant, si la r\u00e9sistance augmente soudainement ou fluctue fortement lorsque la bande se d\u00e9place, cela confirme une micro-fissure dans la trace de cuivre. Cette fissure agit comme une r\u00e9sistance variable : lorsque la bande est plate, le cuivre touche et conduit ; lorsqu'elle est pli\u00e9e, l'\u00e9cart s'ouvre, et la connexion \u00e9choue.<\/p>\n

    Comparaison des m\u00e9thodes de d\u00e9tection<\/h3>\n\n\n\n\n\n\n\n\n
    M\u00e9thode<\/th>\nMat\u00e9riel n\u00e9cessaire<\/th>\nD\u00e9tecte<\/th>\nAvantages\/Inconv\u00e9nients<\/th>\n<\/tr>\n<\/thead>\n
    Contr\u00f4le Visuel<\/strong><\/td>\nMicroscope 50x<\/td>\nFissures de surface, dommage au phosphore<\/td>\nPour :<\/strong> Facile \u00e0 rep\u00e9rer les dommages de rev\u00eatement.
    Contre :<\/strong> Ne d\u00e9tecte pas les ruptures de cuivre internes.<\/td>\n<\/tr>\n
    R\u00e9sistance Dynamique<\/strong><\/td>\nMultim\u00e8tre en milliohms<\/td>\nFissures de pistes internes<\/td>\nPour :<\/strong> Id\u00e9al pour les tests de fiabilit\u00e9.
    Contre :<\/strong> N\u00e9cessite un \u00e9quipement sp\u00e9cialis\u00e9.<\/td>\n<\/tr>\n
    Imagerie Thermique<\/strong><\/td>\nCam\u00e9ra IR<\/td>\nPoints chauds (Haute R\u00e9sistance)<\/td>\nPour :<\/strong> Visualise les points de stress.
    Contre :<\/strong> Ne fonctionne que si la bande est aliment\u00e9e.<\/td>\n<\/tr>\n
    Imagerie aux Rayons X<\/strong><\/td>\nAppareil \u00e0 Rayons X<\/td>\nD\u00e9lamination sous-surface<\/td>\nPour :<\/strong> Vue profonde non destructive.
    Contre :<\/strong> Inabordable pour la plupart.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Dois-je effectuer des tests de cyclage thermique pendant que la bande est pli\u00e9e ?<\/h2>\n

    Nous conseillons toujours \u00e0 nos partenaires que le stress m\u00e9canique et le stress thermique ne sont pas des \u00e9v\u00e9nements isol\u00e9s ; ils attaquent simultan\u00e9ment la bande LED. Ignorer l'effet combin\u00e9 de la chaleur et de la courbure est la raison pour laquelle de nombreux produits \"test\u00e9s\" \u00e9chouent lors des variations de temp\u00e9rature hiver-\u00e9t\u00e9 ou en environnements \u00e0 haute chaleur<\/a>.<\/p>\n

    Oui, vous devez effectuer des tests de cyclage thermique pendant que la bande est m\u00e9caniquement contrainte \u00e0 son rayon de courbure minimal. Cela simule le stress combin\u00e9 de l'expansion thermique sur les traces de cuivre tendues, r\u00e9v\u00e9lant des faiblesses que les tests thermiques plats standard manqueront.<\/strong><\/p>\n

    \"\"<\/p>\n

    Le Facteur de Stress Combin\u00e9<\/h3>\n

    Lorsque nous concevons des bandes pour des march\u00e9s comme la France, o\u00f9 les variations de temp\u00e9rature peuvent \u00eatre importantes, nous devons prendre en compte la physique du cuivre. Le cuivre se dilate lorsqu'il est chauff\u00e9 et se contracte lorsqu'il refroidit.<\/p>\n

    Si une bande COB est install\u00e9e \u00e0 plat, cette expansion est r\u00e9partie uniform\u00e9ment. Cependant, lorsqu'une bande est pli\u00e9e autour d'une courbe, les traces de cuivre \u00e0 l'ext\u00e9rieur du pli sont d\u00e9j\u00e0 sous tension m\u00e9canique (\u00e9tir\u00e9es). Lorsque vous allumez la lumi\u00e8re, la chaleur provoque une expansion suppl\u00e9mentaire, augmentant cette tension. Inversement, lorsque la lumi\u00e8re est \u00e9teinte et que la bande refroidit, le cuivre se contracte, tirant fermement contre les joints de soudure.<\/p>\n

    Mise en place du protocole de test<\/h3>\n

    Pour reproduire cela en environnement de test, nous ne lan\u00e7ons pas simplement un rouleau de bande LED dans une chambre thermique. Nous montons la bande sur un gabarit courb\u00e9 qui imite le rayon de courbure minimal (par exemple, un tuyau de 50 mm de diam\u00e8tre).<\/p>\n

    Notre protocole recommand\u00e9 :<\/strong><\/p>\n

      \n
    1. Contraintes :<\/strong> Fixez fermement la bande \u00e0 la surface courb\u00e9e en utilisant l'adh\u00e9sif r\u00e9el pr\u00e9vu pour le projet (g\u00e9n\u00e9ralement 3M VHB).<\/li>\n
    2. Plage de temp\u00e9rature :<\/strong> Faites cycler la chambre de -20\u00b0C \u00e0 +60\u00b0C (ou jusqu'\u00e0 +85\u00b0C pour les grades industriels).<\/li>\n
    3. Temps de s\u00e9jour :<\/strong> Maintenez \u00e0 chaque extr\u00e9mit\u00e9 pendant 30 minutes pour assurer que le c\u0153ur du PCB atteigne la temp\u00e9rature cible.<\/li>\n
    4. \u00c9tat d'alimentation :<\/strong> Id\u00e9alement, alimentez la bande pendant la phase \"chaude\" et \u00e9teignez-la pendant la phase \"froide\" pour maximiser le choc thermique.<\/li>\n<\/ol>\n

      Interpr\u00e9tation des r\u00e9sultats<\/h3>\n

      Nous constatons souvent qu'une bande qui survit \u00e0 1000 cycles thermiques \u00e0 plat peut \u00e9chouer apr\u00e8s seulement 200 cycles lorsqu'elle est pli\u00e9e. La d\u00e9faillance survient g\u00e9n\u00e9ralement sous forme de d\u00e9lamination de la feuille de cuivre du support en polyimide (la partie plastique du PCB). Si vous voyez le cuivre se soulever ou faire des bulles au sommet du pli apr\u00e8s le cyclage thermique, le produit n'est pas adapt\u00e9 aux installations courb\u00e9es dans des environnements avec des fluctuations de temp\u00e9rature.<\/p>\n

      Comment l'encapsulation en silicone influence-t-elle la flexibilit\u00e9 et la protection de mes bandes COB ?<\/h2>\n

      Lorsque nous laminoons nos bandes pour des classifications IP65 ou IP67<\/a>, nous remarquons un changement distinct dans la fa\u00e7on dont le produit g\u00e8re les courbes. Bien que la protection soit essentielle pour les projets ext\u00e9rieurs, la rigidit\u00e9 suppl\u00e9mentaire du mat\u00e9riau peut involontairement augmenter la stress sur le circuit interne si elle n'est pas calcul\u00e9e correctement.<\/p>\n

      L'encapsulation en silicone am\u00e9liore consid\u00e9rablement la protection du circuit contre l'humidit\u00e9 et les vibrations, mais augmente g\u00e9n\u00e9ralement le rayon de courbure minimum de 10-20%. Bien qu'elle pr\u00e9serve contre les dommages physiques externes, la rigidit\u00e9 ajout\u00e9e n\u00e9cessite un diam\u00e8tre de courbure plus grand pour \u00e9viter la d\u00e9lamination entre le PCB et le rev\u00eatement.<\/strong><\/p>\n

      \"\"<\/p>\n

      Le compromis entre protection et flexibilit\u00e9<\/h3>\n

      Dans notre processus de fabrication, nous utilisons du silicone car il offre une r\u00e9sistance UV sup\u00e9rieure et une flexibilit\u00e9 par rapport au PVC ou au Polyur\u00e9thane (PU). Cependant, l'ajout d'une couche de silicone au-dessus de la bande COB d\u00e9place \"l'axe neutre\" de la courbure.<\/p>\n

      Pensez \u00e0 cela comme un livre : il est facile de plier une seule feuille de papier, mais difficile de plier un annuaire. Le silicone ajoute de l'\u00e9paisseur. Lorsque vous pliez une bande COB IP67, le PCB est forc\u00e9 de s'\u00e9tirer davantage que s'il \u00e9tait nu, car il est maintenant plus \u00e9loign\u00e9 du centre du rayon de courbure.<\/p>\n

      Comparaison des mat\u00e9riaux et impact<\/h3>\n

      Nous avons compil\u00e9 des donn\u00e9es sur la fa\u00e7on dont diff\u00e9rents mat\u00e9riaux d'\u00e9tanch\u00e9it\u00e9 affectent la flexibilit\u00e9 de nos bandes COB :<\/p>\n\n\n\n\n\n\n\n\n
      Mat\u00e9riau d'encapsulation<\/th>\nImpact sur la flexibilit\u00e9<\/th>\nNiveau de protection<\/th>\nAjustement recommand\u00e9 du rayon<\/th>\n<\/tr>\n<\/thead>\n
      Nu (IP20)<\/strong><\/td>\nAucun (Flex maximal)<\/td>\nFaible (simple poussi\u00e8re)<\/td>\nR\u00e9f\u00e9rence (par exemple, 30mm)<\/td>\n<\/tr>\n
      Spray en silicone (IP54)<\/strong><\/td>\nFaible (<5% plus rigide)<\/td>\nMoyen (\u00c9claboussures)<\/td>\n+5mm (par exemple, 35mm)<\/td>\n<\/tr>\n
      Tube en silicone (IP65)<\/strong><\/td>\nMoyen (10-15% plus rigide)<\/td>\n\u00c9lev\u00e9 (Pluie\/Jets)<\/td>\n+10mm (par exemple, 40mm)<\/td>\n<\/tr>\n
      Extrusion en silicone solide (IP67)<\/strong><\/td>\n\u00c9lev\u00e9 (20%+ plus rigide)<\/td>\nTr\u00e8s \u00e9lev\u00e9 (Submersion)<\/td>\n+20mm (par exemple, 50mm)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      Pr\u00e9venir la d\u00e9lamination<\/h3>\n

      Un mode de d\u00e9faillance sp\u00e9cifique que nous observons avec les bandes encapsul\u00e9es est la d\u00e9lamination. Si vous pliez une bande encastr\u00e9e en silicone trop fortement, le silicone veut revenir \u00e0 sa forme droite plus que le circuit imprim\u00e9 en cuivre. Cela cr\u00e9e une force de cisaillement qui peut d\u00e9chirer le silicone du circuit ou, pire, arracher les puces LED de la carte.<\/p>\n

      Pour les projets n\u00e9cessitant des courbes serr\u00e9es dans des zones humides, nous recommandons d'utiliser des tubes en silicone \"creux\" plut\u00f4t que des extrusions solides. L'espace creux permet au circuit de bouger l\u00e9g\u00e8rement ind\u00e9pendamment du bo\u00eetier, r\u00e9duisant la tension sur les joints de soudure. V\u00e9rifiez toujours si le fabricant utilise un processus de \"co-extrusion\" (o\u00f9 le silicone et le circuit sont li\u00e9s) ou un processus de \"tubage\" (o\u00f9 la bande glisse \u00e0 l'int\u00e9rieur). Ce dernier est g\u00e9n\u00e9ralement plus s\u00fbr pour des courbes complexes.<\/p>\n

      Conclusion<\/h2>\n

      Tester la stabilit\u00e9 des bandes LED COB \u00e0 haute densit\u00e9 ne consiste pas seulement \u00e0 trouver le point de rupture ; il s'agit d'\u00e9tablir une zone de s\u00e9curit\u00e9 pour vos projets. En v\u00e9rifiant le rayon de courbure minimum avec une marge de s\u00e9curit\u00e9, en utilisant des m\u00e9thodes avanc\u00e9es pour d\u00e9tecter les micro-fissures, et en effectuant des cycles thermiques sous contrainte m\u00e9canique, vous pouvez \u00e9liminer 90% des d\u00e9faillances post-installation. Que vous soyez distributeur ou entrepreneur, prendre le temps de valider ces param\u00e8tres garantit que la lumi\u00e8re sans points de COB reste impeccable pendant des ann\u00e9es.<\/p>","protected":false},"excerpt":{"rendered":"

      We often encounter clients who are frustrated by LED strips that fail shortly after being installed in curved architectural coves. […]<\/p>\n","protected":false},"author":1,"featured_media":1183,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[5],"tags":[],"class_list":["post-1187","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nHow to Test Stability of High-Density Dotless COB LED Strips<\/title>\n<meta name=\"description\" content=\"A practical guide for buyers on testing the bending stability of high-density dotless COB LED strips. 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