×

Effective thermal emission on TFT-LCD TV panels for improving image quality. (English) Zbl 1375.80020

Summary: The study aims at improving the image quality of \(23''\) commercial thin-film transistor-liquid crystal display (TFT-LCD) TVs caused by temperature increase on panels. Both the numerical simulation and measurement of temperature distributions characterize the thermal features of TV panels under normal operation. Simulation results justified by experimental data verify the numerical modeling, and characterize thermal phenomena both on the panel and in the backlight unit (BLU) as well. Opening apertures on BLU provide heat dissipation on the direct-lit BLU, and effectively lower the whole temperature distribution of TFT-LCD TVs without adding extra heat dissipation modules. This leads to improve image quality on the panel.

MSC:

80M99 Basic methods in thermodynamics and heat transfer

Software:

ANSYS-CFX
Full Text: DOI

References:

[1] Chen YK, Huang KF, Lin MH. Thermal enhancement of LCD module by numerical analysis. In: Society for information display 2006 international symposium; 2006. p. 524 – 7.
[2] Lee Ch-L, Chen R-Sh. The analysis of heat transfer for 19\(^{\prime}\)\(^{\prime}\) LCD monitor by CFDesign. In: Proceedings of the 13th national conference on computational fluid dynamics; 2006. CFD13-2201.
[3] Chu Ch-Y, Pan M-Ch, Ho J. Thermal analysis and experimental validation on TFT – LCD panels for image quality concerns. In: Proceedings of IEEE the 7th electronics packaging technology conference; 2005. p. 543 – 8.
[4] Chu Ch-Y, Pan M-Ch. Fluid – solid coupling/thermal deformation analysis and experimental validation of on TFT – LCD TV panels. In: Taiwan ANSYS 2005 user conference; 2005. p. 1-59 – 67.
[5] Chu Ch-Y, Pan M-Ch. Transient analysis and experimental validation of thermal-fluidic fields on TFT – LCD TV panels. In: Proceedings of IEEE the 8th electronics packaging technology conference; 2006. p. 346 – 52.
[6] Chu Ch-Y, Pan M-Ch. Transient simulation and experimental validation of thermal-fluidic fields on direct-lit backlight unit. In: Taiwan ANSYS 2006 user conference; 2006. p. 101 – 7.
[7] Lee, T. Y. T.; Chambers, B.; Mahalingam, M.: Application of CFD technology to electronic thermal management, IEEE trans compon packaging manuf technol part B adv packaging 18, No. 3, 511-520 (1995)
[8] Lee, T. Y. T.: An investigation of thermal enhancement on flip chip plastic BGA packages using CFD tool, IEEE trans compon packaging technol 23, No. 3, 481-489 (2000)
[9] Altaç, Z.; Kurtul, Ö: Natural convection in tilted rectangular enclosures with a vertically situated hot plate inside, Appl therm eng 27, No. 11 – 12, 1832-1840 (2007)
[10] Kim, B. S.; Lee, D. S.; Ha, M. Y.; Yoon, H. S.: A numerical study of natural convection in a square enclosure with a circular cylinder at different vertical locations, Int J heat mass transfer 51, No. 7 – 8, 1888-1906 (2008) · Zbl 1140.80337 · doi:10.1016/j.ijheatmasstransfer.2007.06.033
[11] Ou CR, Her R, Tzeng R, Chen CH, Lin CY. Simulate the mura phenomena caused by the thermal deformation of film materials in the LCD module. In: Proceedings of the 12th international display workshops in conjunction with Asia display; 2005. p. 319 – 22.
[12] Kim, G. H.; Kim, W. -J.; Kim, S. -M.; Son, J. -G.: Analysis of thermo-physical and optical properties of a diffuser using PET/PC/PBT copolymer in LCD backlight units, Displays 26, No. 1, 37-43 (2005)
[13] Kim, G. H.: A PMMA composite as an optical diffuser in a liquid crystal display backlighting unit, Eur polym J 41, No. 8, 1729-1737 (2005)
[14] Chen YS, Hsu CM, Chiu PL, Li YW, Hung TH. Effects of the light guide plate deformation on the optical performance of the LCD module. In: The 31st national conference on theoretical and applied mechanics; 2007. No. F14.
[15] ANSYS-CFX Solver, release 10.0: theory, ANSYS Inc; 2006.
[16] Incropera, F. P.; Dewitt, D. P.: Fundamentals of heat and mass transfer, (1996)
This reference list is based on information provided by the publisher or from digital mathematics libraries. Its items are heuristically matched to zbMATH identifiers and may contain data conversion errors. In some cases that data have been complemented/enhanced by data from zbMATH Open. This attempts to reflect the references listed in the original paper as accurately as possible without claiming completeness or a perfect matching.