Image forming apparatus and method of controlling the same
An image forming apparatus and a method of controlling the same which may prevent brokenness of data displayed on a display are provided. The image forming apparatus performs a read operation on data previously stored at a specific address of a storage unit of an LCD module or on data stored through a write operation. The image forming apparatus compares data acquired through the read operation and known data. If the data acquired through the read operation and the known data are different, the image forming apparatus adjusts a setup time of an enable signal to prevent brokenness of data due to incorrect timing of the enable signal.
1. An image forming apparatus comprising a microcomputer, the microcomputer comprising:
a data transceiver to transmit a write signal and data to a Liquid Crystal Display (LCD) module to perform a write operation on a storage unit of the LCD module, to transmit a read signal to the LCD module to perform a read operation on the written data, and to receive data acquired through the read operation;
a data comparator to compare the data transmitted for the write operation and the data acquired through the read operation;
an enable signal adjuster to adjust a setup time of an enable signal when the data transmitted for the write operation and the data acquired through the read operation are different; and
an enable signal transmitter to transmit an enable signal according to the setup time.
2. The image forming apparatus according to claim 1 , wherein the microcomputer further comprises a memory to store a basic setup time of the enable signal.
3. The image forming apparatus according to claim 2 , wherein adjusting the setup time comprises extending the basic setup time of the enable signal by a predetermined interval.
4. The image forming apparatus according to claim 3 , wherein adjusting the setup time by extending the basic setup time of the enable signal by a predetermined interval comprises:
adjusting the setup time by comparing data transmitted for the write operation and data acquired through the read operation at least once and repeatedly increasing the basic setup time until the data transmitted for the write operation and the data acquired through the read operation are identical.
5. The image forming apparatus according to claim 1 , wherein adjusting the setup time comprises adjusting the setup time when the image forming apparatus is initially powered on or adjusting the setup time when a predetermined time has elapsed during consecutive printing or when a predetermined number of pages have been printed.
6. The image forming apparatus according to claim 1 , wherein the microcomputer further comprises a power source to provide power to the LCD module and a scaler to convert various input signals input to the LCD module into digital signals and to scale the digital signals.
7. An image forming apparatus comprising a microcomputer, the microcomputer comprising:
a data transceiver to transmit a read signal to perform a read operation on data stored at a specific address of a storage unit of an LCD module and to receive data acquired through the read operation;
a memory to store data identical to the data stored at the specific address of the storage unit;
a data comparator to compare the data acquired through the read operation and data previously stored in the memory;
an enable signal adjuster to adjust a setup time of an enable signal when the data acquired through the read operation and the data previously stored in the memory are different; and
an enable signal transmitter to transmit an enable signal according to the setup time.
8. The image forming apparatus according to claim 7 , wherein the microcomputer further comprises a memory to store a basic setup time of the enable signal.
9. The image forming apparatus according to claim 8 , wherein adjusting the setup time comprises extending the basic setup time of the enable signal by a predetermined interval.
10. The image forming apparatus according to claim 9 , wherein adjusting the setup time by extending the basic setup time of the enable signal by a predetermined interval comprises:
adjusting the setup time by comparing the data acquired through the read operation and the data previously stored in the memory at least once and repeatedly increasing the basic setup time until the data acquired through the read operation and the data previously stored in the memory are identical.
11. The image forming apparatus according to claim 7 , wherein adjusting the setup time comprises adjusting the setup time when the image forming apparatus is initially powered on or adjusting the setup time when a predetermined time has elapsed during consecutive printing or when a predetermined number of pages have been printed.
12. The image forming apparatus according to claim 7 , wherein the microcomputer further comprises a power source to provide power to the LCD module and a scaler to convert various input signals input to the LCD module into digital signals and to scale the digital signals.
13. A method of controlling an image forming apparatus, the method comprising:
transmitting a write signal and data to a liquid Crystal Display (LCD) module to perform a write operation on a storage unit of the LCD module;
transmitting a read signal to perform a read operation on the written data and receiving data acquired through the read operation; and
comparing the data transmitted for the write operation and the data acquired through the read operation, adjusting a setup time of an enable signal when the data transmitted for the write operation and the data acquired through the read operation are different, and transmitting an enable signal according to the setup time.
14. The method according to claim 13 , wherein adjusting the setup time comprises adjusting the setup time when the image forming apparatus is initially powered on or adjusting the setup time when a predetermined time has elapsed during consecutive printing or when a predetermined number of pages have been printed.
15. The method according to claim 14 , wherein, when the image forming apparatus is initially powered on, a write operation and a read operation are performed to write and read the data to and from the storage unit according to a basic setup time and data transmitted for the write operation and data acquired through the read operation are compared to adjust the setup time.
16. The method according to claim 14 , wherein, when the predetermined time has elapsed during the consecutive printing or when the predetermined number of pages have been printed, a write operation and a read operation are performed to write and read the data to and from the storage unit according to a basic setup time and data transmitted for the write operation and data acquired through the read operation are compared to adjust the setup time.
17. The method according to claim 14 , wherein, when the image forming apparatus is initially powered on or when the predetermined time has elapsed during the consecutive printing or when the predetermined number of pages have been printed, a write operation and a read operation are performed to write and read the data to and from the storage unit according to a basic setup time, and data transmitted for the write operation and data acquired through the read operation are compared, and then the setup time is adjusted by increasing the basic setup time when the data transmitted for the write operation and the data acquired through the read operation are different.
18. A method of controlling an image forming apparatus, the method comprising:
transmitting a read signal to perform a read operation on data stored at a specific address of an LCD module and receiving data acquired through the read operation;
comparing the data acquired through the read operation and data previously stored in a memory; and
adjusting a setup time of an enable signal when the data acquired through the read operation and the data previously stored in the memory are different.
19. The method according to claim 18 , wherein adjusting the setup time comprises adjusting the setup time when the image forming apparatus is initially powered on or adjusting the setup time when a predetermined time has elapsed during consecutive printing or when a predetermined number of pages have been printed.
20. The method according to claim 19 , wherein, when the image forming apparatus is initially powered on, a read operation is performed on data at the specific address of the storage according to a basic setup time and the data acquired through the read operation and the data previously stored in the memory are compared to adjust the setup time.
21. The method according to claim 19 , wherein, when the predetermined time has elapsed during the consecutive printing or when the predetermined number of pages have been printed, a read operation is performed on data at the specific address of the storage according to a basic setup time and the data acquired through the read operation and the data previously stored in the memory are compared to adjust the setup time.
22. The method according to claim 19 , wherein, when the image forming apparatus is initially powered on or when the predetermined time has elapsed during the consecutive printing or when the predetermined number of pages have been printed, a read operation is performed on data at the specific address of the storage according to a basic setup time, and the data acquired through the read operation and the data previously stored in the memory are compared, and then the setup time is adjusted by increasing the basic setup time when the data acquired through the read operation and the data previously stored in the memory are different.
23. An image forming apparatus comprising:
an LCD module to receive data and a write signal from a microcomputer and writes the data to a storage unit at a specific address, and
to perform a read operation on data written to the specific address upon receiving a read signal from the microcomputer and transmit the read data to the microcomputer.
24. An image forming apparatus comprising:
an LCD module to perform a read operation on data previously stored in a storage unit at a specific address upon receiving a read signal from a microcomputer and to transmit data acquired through the read operation to the microcomputer.
25. The image forming apparatus according to claim 23 , wherein the LCD module comprises a liquid crystal panel and the liquid crystal panel is provided above a paper discharge portion.
26. The image forming apparatus according to claim 24 , wherein the LCD module comprises a liquid crystal panel and the liquid crystal panel is provided above a paper discharge portion.