Liquid crystal display with elastic ground contact on first side and multiple ground contacts on second side of drive circuit board
View Patent ↗A liquid crystal display comprises a liquid crystal module ( 10 ) having a predetermined shape and having a back side covered with a metal back case ( 12 ); a liquid crystal drive circuit board ( 20 ) electrically connected at one side of the liquid crystal module ( 10 ), extending toward the central portion from the one side by predetermined length, having an electric connector ( 22 ) disposed on one side of the circuit board ( 20 ), and mounted on the metal back case ( 12 ); and a metal cover ( 30 ) having a cutout ( 33 ) large enough to expose the electric connector ( 22 ) and covering the circuit board ( 20 ). An earth terminal ( 36 ) is provided at one edge of the cutout ( 33 ) and is brought into elastic contact with an earth contact ( 24 a ) provided on one side of the circuit board ( 20 ) when the circuit board ( 20 ) is covered with the metal cover ( 30 ). With this constitution, a stable ground line is formed in the display by a simple machining to avoid noise interference.
1. A liquid crystal display, comprising:
a liquid crystal module having a predetermined shape and a back side covered by a metallic back case;
a liquid crystal drive circuit board mounted on the metallic back case and electrically connected to the edge of one side of the liquid crystal module, extending from the peripheral edge toward the central portion by a predetermined length;
an electric connector(s) attached near the peripheral edge of the liquid crystal drive circuit board; and
a metallic cover provided with a cutout large enough to expose the electric connector(s) and cover the liquid crystal drive circuit board,
wherein an earth terminal is provided on one peripheral edge of the cutout portion of the metal cover, and the earth terminal is brought into elastic contact with an earth contact provided on one side of the liquid crystal drive circuit board, and
wherein multiple protrusions are formed on the metallic back case and come into contact with earth contacts provided on a second side of the liquid crystal drive circuit board.
2. The liquid crystal display according to claim 1 , wherein an integrated circuit device is provided on the liquid crystal drive circuit board and the earth contact on the one side of the liquid crystal drive circuit board is disposed between the integrated circuit device and the electric connector(s).
3. The liquid crystal display according to claim 2 , wherein said integrated circuit device is a timing controller for driving the liquid crystal module.
4. The liquid crystal display according to claim 1 , wherein the liquid crystal drive circuit board is mounted on the metallic back case while a spacer having a predetermined height is laid at least between the vicinity of the location of the earth contact on the one side of the liquid crystal drive circuit board and the metallic back case.
5. The liquid crystal display according to claim 4 , wherein the spacer forms part of a locking protrusion for affixing the metal cover.
6. The liquid crystal display according to claim 1 , wherein the number of earth contacts provided on the second side of said liquid crystal drive circuit board is greater than one below or within the vicinity of the lower part of the connecting surface of the electric connector(s).
7. A liquid crystal display, comprising:
a liquid crystal module having a predetermined shape and a backside covered by a metallic back case;
a liquid crystal drive circuit board mounted on the metallic back case and electrically connected to the edge of one side of the liquid crystal module, extending from the peripheral edge toward the central portion by a predetermined length; and;
an electric connector(s) attached near the peripheral edge of the liquid crystal drive circuit board,
wherein multiple earth contacts and multiple protrusions are provided on one side of said liquid crystal drive circuit board and the metallic back case respectively, whereby each of the earth contacts comes into elastic contact with the multiple protrusions to mount the liquid crystal drive circuit board onto the metallic back case.
8. The liquid crystal display according to claim 7 , wherein the multiple earth contacts provided on the liquid crystal drive circuit board are disposed below or within the vicinity of the lower part of the connecting surface of the electric connector(s).
9. The liquid crystal display according to claim 7 , wherein the liquid crystal drive circuit board is mounted on the metallic back case while a spacer having a predetermined height is laid between the circuit board and the metallic back case.