| 摘要 |
<p>A direct-lit backlight module comprising: a back panel (2), a backlight source (4) arranged in the back panel (2), and a diffuser plate (6) arranged on the back panel (2) and above the backlight source (4). The backlight source (4) comprises several LED light strips (42). Each of the LED light strips (42) comprises several LED lamps (44). The diffuser plate (6) is provided with an incident surface (62) arranged opposite the backlight source (4). A phosphor layer (5 and 5') is coated onto the incident surface (62) of the diffuser plate (6). Lights emitted by the LED lamps (44) excite the phosphor layer (5 and 5') into emitting light. The light emitted by the excited phosphor layer (5 and 5') and some of the lights emitted by the LED lamps (44) blend into a white light required by the backlight source (4). By means of a design in which the phosphor is separated from the LED lamps and the phosphor is coated onto the incident surface of the diffuser plate, the direct-lit backlight module effectively solves the impact that heat generated by light-emitting chips of the LED lamps has on the optical efficiency of the phosphor, further conserves energy, facilitates environmental protection, also increases the evenness of color and of brightness, reduces color shifts, and effectively reduces the problem of excessively thick LED light box in direct-lit backlight modules, thus achieving the goal of thickness reduction.</p> |
