An exemplary light emitting diode includes a main body, a red light emitting chip, a green light emitting chip, and a blue light emitting chip. The main body includes two inner side surfaces opposite to each other and a inner bottom surface connected with the side surfaces. The side surfaces and the bottom surface cooperatively define an accommodating space. The red light emitting chip, the green light emitting chip and the blue light emitting chip are positioned at the bottom surface and the side surfaces of the accommodating space, respectively.
An exemplary a display apparatus (2) includes a display panel (21) and a height adjusting device (25). The height adjusting device includes a base (26), a supporting member (27), a locking unit (30), and an elastic member (28). The display panel is fixed to the locking unit. The supporting member is fixed on the base. The supporting member includes two generally vertical friction grooves (2723, 2725). A depth of one of the friction grooves decreases with increasing height above the base, and a depth of the other friction groove increases with increasing height above the base. The locking unit is accommodated in the supporting member. The locking unit includes two sliders (33, 35) corresponding to the two friction grooves of the supporting member respectively. One of the sliders abuts a corresponding one of the friction grooves. The elastic member spans between the locking unit and the base.
An exemplary flexible printed circuit (20) includes a primary body (210) and a secondary body (220). The primary body includes a primary connection portion (211), and a primary engaging portion. The secondary body includes a secondary connection portion (221) and a secondary engaging portion (223). The primary body and the secondary body are electrically connected by connecting the primary engaging portion and the secondary engaging portion together.
An exemplary backlight control circuit (20) includes at least two sampling circuits (21), at least two feedback circuits (22), and a PWM IC (23). Each of the sampling circuits includes a sampling output (210) and a backlight lamp (211). The PWM IC includes a current sense pin (230). The at least two feedback circuits correspond to the at least two sampling circuits, respectively. Each of the feedback circuits includes a resistor (222) and a diode (223) electrically coupled in parallel. The sampling output is configured to output a first voltage when the backlight lamp is in a normal working state, and output a second voltage when the backlight lamp has an open circuit. One terminal of the diode is electrically coupled to the sampling output of a corresponding one of the sampling circuits, and an opposite terminal of the diode is electrically coupled to the current sense pin.
G05F 1/00 - Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
Chimei Innolux Corporation (Taiwan, Province of China)
Inventor
Yu, Chuan-Pei
Hsiao, Chung-Liang
Abstract
A method for fixing a flexible circuit board (FPC) of a display module includes providing a housing having at least a fixing pin, providing a display panel and an FPC having at least a fixing hole corresponding to the fixing pin, disposing the display panel and the FPC on the housing and folding back the FPC on another side of the housing such that the fixing pin passes through the fixing hole, and performing a hot mounting process to the fixing pin to enlarge the top end of the fixing pin to press the FPC onto the housing.
A driving circuit of a liquid crystal display (LCD) (23) includes a system driver (28), a power supply device (26) and a system control device (25). The power supply device provides a votage to the system driver. The system control device generates a control signal, a data signal, and a backlight driving signal, and applies them to the system driver. The system driver drives an LCD panel (21) and a backlight of the LCD according to the backlight driving signal, the data signal and the control signal. The configuration of the driving circuit is simple.
G09G 3/36 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source using liquid crystals
patents