Disinn tal-istruttura tal-pjanċa ta 'gwida tad-dawl tal-modulu tal-wiri tal-kristalli likwidi TFT LCD
Apr 08, 2022
The light guide plate (LGP) of the TFT LCD liquid crystal display module is a material that works on the principle of light reflection and light scattering. This paper mainly introduces the structural design of the light guide plate of the TFT liquid crystal display screen. The main evaluation items include the production method, assembly structure, effective light-emitting area and gap, position fixation, and warpage control.
1. Metodu ta 'produzzjoni. Il-pjanċa ta 'gwida tad-dawl hija ġeneralment iffurmata minn iffurmar u qtugħ ta' injezzjoni. L-iffurmar tal-injezzjoni juża l-proċess tal-iffurmar tal-injezzjoni biex jinjetta partiċelli tal-plastik fi pjanċi ta 'gwida ħfief b'wiċċ lixx fuq naħa waħda u tikek ottiċi fuq in-naħa l-oħra, bħal pjanċi ta' gwida tad-dawl ultra-rqaq u pjanċi żgħar ta 'gwida tad-dawl. Qtugħ biex tagħmel pjanċa ta 'gwida ħafifa huwa li tuża pjanċa ta' gwida tad-dawl kbir biex taqta 'fil-forma mixtieqa tal-pjanċa ta' gwida tad-dawl, u mbagħad uża materjal b'riflettività għolja u mingħajr assorbiment tad-dawl fuq in-naħa tal-pjanċa ta 'gwida tad-dawl maqtugħa, u uża proċess ta 'screen printing fuq il-qiegħ tal-pjanċa ta' gwida tad-dawl. Stampa b'tikek ċirkolari jew kwadri biex ixerred id-dawl. Meta d-dawl jolqot it-tikek, id-dawl ikun rifless fid-direzzjonijiet kollha, u mbagħad il-kundizzjonijiet ta 'riflessjoni se jinqerdu u d-dawl jiġi emess minn quddiem tal-pjanċa ta' gwida tad-dawl. Sabiex jiġi żgurat li l-probabbiltà li d-dawl jirrifletti fid-direzzjonijiet kollha tkun bejn wieħed u ieħor l-istess, u biex il-wiċċ li jarmi d-dawl-tal-pjanċa tal-gwida tad-dawl jarmu dawl b'mod uniformi, għandhom jintużaw diversi densità u daqsijiet differenti ta 'tikek. Bħala sett, hemm ukoll film li jirrifletti taħt il-pjanċa tal-gwida tad-dawl, li tintuża biex tirrifletti d-dawl nixxew mill-wiċċ tal-qiegħ lura fil-pjanċa tal-gwida tad-dawl, sabiex ittejjeb ir-rata ta 'utilizzazzjoni tad-dawl u żżid il-luminożità.
Second, the assembly structure. The assembly structure of the light guide plate is divided into two types: reverse installation and normal installation. Reverse installation is to integrate the light guide plate and the plastic frame into a whole by designing a fitting structure on the plastic frame and the light guide plate. The light utilization rate of the reverse-mounted light guide plate is low, and it is generally limited to small-sized products. Formal installation is to assemble one by one from the back panel, which is more convenient to assemble and is mainly used for medium and large size products. The formal structure is easy to disassemble and rework the components, and the disadvantage is that the assembly process is increased. Although the increase in the number of processes for formal installation leads to an increase in cost, this structure is of great help in improving the light utilization rate of the light guide plate.
3. Żona u vojt effettivi li jarmi d-dawl-. Fi ħdan l-ispeċifikazzjoni tal-angolu tal-vista, huwa meħtieġ li l-iskrin tal-wiri korrispondenti jista 'jiġi mdawwal bid-dawl, għalhekk id-disinn tal-pjanċa tal-gwida tad-dawl jeħtieġ li jikkunsidra bis-sħiħ iż-żona effettiva ta' ħruġ tad-dawl-. Il-materjal tal-pjanċa tal-gwida tad-dawl se jespandi jew jikkuntratta b'bidliet fl-umdità ambjentali jew fit-temperatura, għalhekk id-disinn tad-distakk bejn il-pjanċa tal-gwida tad-dawl u l-komponenti li jmissu magħhom għandu jqis l-ammont ta 'espansjoni u kontrazzjoni minbarra t-tolleranza. Jekk il-pjanċa tal-gwida tad-dawl tinterferixxi mal-istruttura tal-konnessjoni, il-ħoss iseħħ meta tħawwad. Oqgħod attent ħafna għad-disinn tad-distakk bejn il-pjanċa tal-gwida tad-dawl u l-qafas tal-plastik.
Fourth, the location is fixed. The fixed position of the light guide plate is designed to prevent the light guide plate from loosening within the gap range after being affected by external force. The position is fixed by means of concave-convex fitting. Design the convex part on the light guide plate and design the concave part on the plastic frame. The design of the convex part of the light guide plate needs to ensure that the problem of stress concentration does not occur after being impacted by external force.
5. Warpage control. Warpage is the main defect of the light guide plate. After the reliability test of high temperature and high humidity, it will expand and warp due to the high water absorption rate. When the light guide plate is warped, it will cause the adjacent optical film to wrinkle, or interfere with the display screen, resulting in abnormal display. As a countermeasure, when designing the light guide plate, the allowable amount of warpage of the light guide plate should be specified. When making the light guide plate, it is necessary to adjust the molding conditions, and in the structural design, it is necessary to appropriately increase the gap between the light guide plate and the plastic frame.
