(tasks) in all available ambient light and crisp display and illumination light, easy to manufacture and inexpensive half provides a transflective liquid crystal display panel and a transflective liquid crystal display device. ; (solving means), the thickness of the light reflecting portion (R) of the filter layer 170 (the thin portions (170a) to a thickness) FR, the thickness (thickness of the light transmission portion (T) of 170 and wall portion (170b) filter), the FT, the thickness of the light reflecting portion (R) of the liquid crystal layer (150) LR, the liquid crystal the layer thickness of the light transmission portion (T) of the (150) LT, when defining a value of the depth of the groove 155 to D, the depth of the groove 155 that is formed in the resin layer (160) D = (LT- is formed so as to satisfy LR) + (FT-FR). When defining the LT-LR L, the FT-FR by F, D = L + F illumination light (B) of the satisfaction by external light (N) and the backlight 200 is equal to the optical path length at the time of transmitting the liquid crystal panel 100, the it is possible to make.
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