Liquid crystal display appliance
A liquid crystal display apparatus which exhausts heat generated within the apparatus efficiently, and reduces temperature increase in the heat-frail sections is provided. A circuit board mounting surface at the back of the liquid crystal monitor unit is divided into a plurality of board mount areas using the vertically extending reinforcement members. A signal circuit board section and TCON (Timing control) circuit board section are disposed in the same board mount area which is different from the partition where the power supply circuit board section resides. By arranging this way, the temperature increase in the heat-frail sections of the signal circuit board section is reduced, and the hot air heated by the power supply circuit board in the power supply circuit board section goes up along the reinforcement members, thus an efficient heat exhaustion is achieved.
1. A liquid crystal display appliance comprising:
a housing, and
a liquid crystal display monitor unit comprising a liquid crystal display panel, a backlight unit illuminating the liquid crystal display panel from a back side of the liquid crystal display panel and circuit boards including a power supply circuit board, the circuit boards being disposed in a space between the housing and a back side surface of the liquid crystal display monitor unit which is disposed opposite the liquid crystal display panel across the back light unit,
wherein the back side surface is divided into at least two board mount areas by at least one reinforcement member attached thereon and extending in a display vertical direction,
wherein the power supply circuit board is mounted in one of the board mount area while the other circuit board is mounted in the other board mount area, and
wherein the reinforcement member is a separation wall dividing the space so as to prevent an air heated by the power supply circuit board in the one board mount area from flowing into the other board mount area.
2. The liquid crystal display appliance according to claim 1 ,
wherein each of the circuit boards is provided with a connector to which a cable is connected, and
wherein the liquid crystal display monitor unit further comprises a shield cover shielding each of the circuit boards, the shield cover having at least an upper opening and a lower opening through which the cable passes, the upper opening formed on an upper end of the shield cover facing the lower opening formed on a lower end of the shield cover substantially straight in the display vertical direction.
3. The liquid crystal display appliance according to claim 2 ,
wherein each of the circuit boards includes components and a high heat generating component which generates more heat than other components is disposed at a position across which the upper opening and the lower opening are disposed straight opposite each other in the display vertical direction.
4. The liquid crystal display appliance according to claim 3 ,
wherein if there are a plurality of the high heat generating components to be mounted on any of the circuit boards, the high heat generating components are disposed on the any of the circuit boards so that only one of the high heat generating components on each straight line in the display vertical direction along which the upper opening and the lower opening are disposed opposite each other.
5. The liquid crystal display appliance according to claim 1 ,
wherein the circuit boards include:
a signal circuit board for generating an image signal with which a picture image is displayed by the liquid crystal display unit and a TCON circuit board for generating a driving signal synchronized with the image signal with which the liquid crystal display panel is driven, the TCON circuit board disposed in the board mount area where the signal circuit board is disposed.
6. The liquid crystal display appliance according to claim 5 ,
wherein the circuit boards further include an inverter circuit board for driving a the backlight unit which is disposed in a board mount area different from the board mount area where the signal circuit board and the TCON circuit board are disposed.
7. The liquid crystal display appliance according to claim 1 ,
wherein the housing includes a back case which is substantially in a box-shape and comprise a back case flat portion and a sidewall surrounding the back case flat portion, the sidewall including an upper sidewall disposed over the back case flat portion and a lower sidewall disposed under the back case flat portion,
wherein ventilation holes are formed in the upper sidewall, in the lower sidewall, in an upper end portion of the back case flat portion in a vicinity of the upper sidewall and in a lower end portion of the back case flat portion in a vicinity of the lower sidewall, and
wherein an airflow path inside the housing through which air flows in the display vertical direction.
8. The liquid crystal display appliance according to claim 7 ,
wherein the liquid crystal display monitor unit further comprises a shield cover shielding each of the circuit boards, the shield cover having at least an upper opening and a lower opening through which the cable passes, the upper opening formed on an upper end of the shield cover facing the lower opening formed on a lower end of the shield cover substantially straight in the display vertical direction, and
wherein the ventilation holes formed in the lower end portion of the back case flat portion in the vicinity of the lower sidewall are disposed below the lower opening formed on the shield cover in the liquid crystal display monitor unit when the liquid crystal display monitor unit is accommodated in the back case.
9. The liquid crystal display appliance according to claim 7 ,
wherein the liquid crystal display monitor unit further comprises a shield cover shielding each of the circuit boards, the shield cover having at least an upper opening and a lower opening through which the cable passes, the upper opening formed on an upper end of the shield cover facing the lower opening formed on a lower end of the shield cover substantially straight in the display vertical direction, and
wherein an air flow path direction in which the air flow in the airflow path is substantially equal to a shield cover opening direction in which the upper opening and the lower opening on the shield cover face each other.
10. The liquid crystal display appliance according to claim 7 ,
wherein there is no ventilation hole formed at a portion of the back case which faces any of the circuit boards inclusive of the power supply circuit board.
11. The liquid crystal display appliance according to claim 7 ,
wherein the liquid crystal display monitor unit further comprises a speaker installed below the inverter circuit board, and
wherein the ventilation holes formed in the lower end portion of the back case flat portion in the vicinity of the lower sidewall are disposed between the inverter circuit board and the speaker when the liquid crystal display monitor unit is accommodated in the back case.