Acer X193 X183H / X193HQ Service Guide - Page 8

1. Product Specification (continued) ACER X193HQ 7 Go to cover page 1.4.5.5 Defect Terminology Table 3 gives the descriptive terms used in classifying defects. D ark / S p o ts / L in es B rig h t S p o ts / L in es P o larizer S cratch P o larizer D en t R u b b in g L in e N ew to n R in g M o ttlin g D im L in e C ro ss L in es O ff B rig h t / D ark D o t S p o ts o r lin es th at ap p ear d ark in th e d isp lay p attern s an d are u su ally th e resu lt o f co n tam in atio n . D efects d o n o t v ary in siz e o r in ten sity (co n trast) w h en co n trast v o ltag e is v aried . C o n trast v ariatio n can b e ach iev ed th ro u g h th e u se o f v aryin g gray sh ad e p attern s. S p o ts o r lin es th at ap p ear lig h t in th e d isp lay p attern s. D efects d o n o t v ary in siz e o r in ten sity (co n trast) w h en co n trast v o ltage is v aried . C o n trast v ariatio n can b e ach iev ed th ro u g h th e u se o f v aryin g g ray sh ad e p attern s. W h en th e u n it lig h ts, lin es ap p ear lig h t (w h ite) w ith d isp lay p attern s d ark an d d o n o t v ary in siz e. P h ysical d am ag e to th e p o lariz er th at d o es n o t d am ag e th e glass W h en th e u n it lig h ts, sp o ts ap p ear lig h t (w h ite) w ith d isp lay p attern s d ark an d d o n o t v ary in siz e. P h ysical d am ag e to th e p o lariz er th at d o es n o t d am ag e th e glass. H o riz o n tal o r d iag o n al lin es th at ap p ear g ray w ith th e d isp lay p attern s d ark an d m ay h av e resu lted fro m an "o u t o f co n tro l" ru b b in g p ro cess o n th e p o lyim id e o r "w av es" o n th e B E F s o r p rism sh eets. T h e "rain b o w " effect cau sed b y n o n -u n ifo rm cell th ick n ess. W h en th e u n it lig h ts, v ariatio n / n o n - u n ifo rm ity (sp lo tch in ess) ap p ears lig h t (w h ite) w ith th e d isp lay an d m ig h t v ary in siz e. W h en th e u n it lig h ts, lin e(s) in th e m o n ito r (v ertical) o r m ajo r (h o riz o n tal) ax is ap p ear d im , b u t n o t co m p letely o n o r o ff. W h en th e u n it lig h ts, lin es in b o th th e m in o r an d m ajo r ax is do n ot app ear. A su b - p ix el (R ,G ,B d o t) stu c k o ff / o n (e le ctrical). 1.4.5.6 Smudges, Streaks and Smears When viewing the panel oriented so as to maximize reflected light , there shall be no visible smudging , streaking, smearing or other nonuniformity from contaminants ,fingerprints,or defects in any of the visible surfaces. This is independent of whether the unit is operating or off . 1.4.5.7 Other Defects Undefined defects that are considered to be rejectable by Lite-On will be reviewed by Lite-On as they become apparent. These panels will be referred to the Lite - On Corporate / Manufacturer Purchasing Agreement for disposition. 1.4.5.8 LCD Inspection Put LCD panel on inspection table and illuminate the panel with a daylight fluorescent lamp located above the panel surface such that the luminance at the LCD panel is between 1000 lux and 1500 lux .Defect limits are given in Table 4 . 1.5 Optical Characteristics Depends on the LCD supplier's spec. Details refer to QA Inspection Spec. Average Diameter smaller of (L+W)/2 or L/20+2W Acceptable Number Minimum Separation < 0.1mm Non countable N/A 0.1 mm ~ 0.3 mm 10 15 mm 0.31 mm ~ 0.5 mm 10 15 mm 0.51 mm ~ 1.25 mm 5 15 mm 1.26 mm ~ 2.5 mm 3 25.4 mm 2.51 mm ~ 3.75 mm 3 25.4 mm Greater than 3.75 mm NONE Not applicable Note : Allowable distance between spots of two sizes is the minimum separation number for the smaller spot. Therefore, if there are two spots, 1.30mm and 0.4mm in diameter, they must be at least 15mm apart.