提出一种基于U型导光板的特种液晶显示背光模组以缩小侧入式背光模组的厚度。首先，利用Lighttools软件对分别采用1 mm和2 mm U型导光板的曲型侧边背光模组进行了设计和建模；接着对两种不同厚度的曲型侧边背光模组与采用4 mm常规平板式导光板的侧入式背光模组进行仿真并对比分析；最后对采用2 mm U型导光板的曲型侧边背光模组进行了相对偏移的仿真，结果表明其光学性能在强振动和宽温环境中具有较高的稳定性。文章得到一种采用2 mm U型导光板的曲型侧边背光模组，相比较常规侧入式背光模组，在保持了光学性能一致性的前提下厚度缩小了2 mm，对特种显示器的薄型化设计有一定的参考意义。

A special liquid crystal display backlight module based on U-shaped light guide plate was presented to reduce the thickness of side-in backlight module.Firstly, the curved side backlight module with 1 mm and 2 mm U-shaped light guide plate was designed and modeled by LightTools software. Then, two different thickness curved side backlight modules and a side-in backlight module with 4 mm conventional flat plate light guide plate were simulated and compared. Finally, the relative shifting simulation of the curved side backlight module with 2 mm U-shaped light guide plate was carried out and the results showed that the optical performance of the module had high stability in the strong vibration and wide temperature environment. Compared with the conventional side-in backlight module, the proposed curved side backlight module with 2 mm U-shaped light guide plate maintained the consistency of optical performance，which had certain reference significance for the thin design of special display.