Timing control circuit with personal identification function and application thereof

Abstract

A timing control circuit with personal identification function suitable for a display device is provided. The timing control circuit has a driving control unit, a video processor and a personal identification circuit. The driving control unit controls the display device according to a horizontal synchronous signal and a vertical synchronous signal. The video processor transmits image data to the display device according to a clock signal and a data enable signal. In addition, the personal identification circuit compares input data from a user with a set of original data and controls the video processor to output display data according to the result of comparison.

1 . A timing control circuit with personal identification function suitable for a display device, comprising: 
 a driving control unit for controlling the display device according to a horizontal synchronous signal and a vertical synchronous signal;    a video processor for transmitting a video data to the display device according to a clock signal and a data enable signal and outputting an image; and    a personal identification circuit for comparing input provided by a user and an internally stored data inside the personal identification circuit and determining if the video processor operates normally according to the result of the comparison.    
   
   
       2 . The timing control circuit of  claim 1 , wherein the personal identification circuit comprises: 
 an interface unit for receiving the input data from the user and the internal data of the personal identification circuit;    a memory control unit coupled to the interface unit and a memory device for transferring the input data from the user and the internal data of the personal identification circuit to the memory device for temporary storage;    a decoder coupled to the memory control unit for decoding the output from the memory control unit;    an accumulator coupled to the decoder for accumulating the output from the decoder; and    a comparator coupled to the accumulator and the decoder for controlling the video processor according to the the input data from the user, the output from the accumulator and the internal data of the personal identification circuit.    
   
   
       3 . The timing control circuit of  claim 2 , wherein the internal data of the personal identification circuit is stored inside a read only memory and the read only memory is coupled to the interface unit.  
   
   
       4 . The timing control circuit of  claim 2 , wherein the memory device is a dynamic random access memory (DRAM) or a synchronous dynamic random access memory (SDRAM).  
   
   
       5 . The timing control circuit of  claim 1 , wherein the internal data of the personal identification circuit comprises a personal code and a preset frame.  
   
   
       6 . A display device with personal identification function, comprising: 
 a display panel;    a gate driving circuit coupled to the display panel through a plurality of scan lines with each scan line driven in sequence according to a vertical synchronous signal;    a source driving circuit coupled to the display panel through a plurality of data lines with each data line driven in sequence according to a horizontal synchronous signal; and    a timing control circuit coupled to the gate driving circuit and the source driving circuit for controlling the timing of the gate driving circuit and the source driving circuit according to the result of comparing user's input data with internal data of the timing control circuit.    
   
   
       7 . The display device of  claim 6 , wherein the timing control circuit comprises: 
 a driving control unit coupled to the gate driving circuit and the source driving circuit for controlling the source driving circuit and the gate driving circuit according to the horizontal synchronous signal and the vertical synchronous signal respectively;    a video processor for transmitting video data to the source driving circuit according to a clock signal and a data enable signal and displaying an output image on the display panel;    an interface unit for receiving the user's input data and internal data of the timing control circuit;    a memory control unit coupled to the interface unit and a memory device for transferring the user's input data and the internal data of the timing control circuit to the memory device for temporary storage;    a decoder coupled to the memory control unit for decoding the output from the memory device;    an accumulator coupled to the decoder for accumulating the output from the decoder; and    a comparator coupled to the accumulator and the decoder for controlling the video processor according to the user's input data, the output from the accumulator and the internal data of the timing control circuit.    
   
   
       8 . The display device of  claim 7 , wherein the internal data of the timing control circuit is stored inside a read only memory and the read only memory is coupled to the interface unit.  
   
   
       9 . The display device of  claim 7 , wherein the memory device is a dynamic random access memory (DRAM) or a synchronous dynamic random access memory (SDRAM).  
   
   
       10 . The display device of  claim 6 , wherein the internal data of the timing control circuit comprises a personal code and a preset frame.  
   
   
       11 . The display device of  claim 6 , wherein the display panel comprises a liquid crystal display panel.  
   
   
       12 . A method of controlling a display device, comprising the steps of: 
 receiving a input data;    decoding a stored image to obtain a decoded data;    accumulating the decoded data to obtain an accumulated value;    setting the display device to operate normally when the input data is identical to an original data and the accumulated value is identical to an initial value; and    displaying a preset frame on the display device when the input data differs from the original data or the accumulated value differs from the initial value.    
   
   
       13 . The method of  claim 12 , wherein each of the input data and the original data is a coded series.  
   
   
       14 . The method of  claim 12 , wherein the preset frame is a totally black screen or a totally white screen.  
   
   
       15 . The method of  claim 12 , wherein the stored image can be preset by the user of the display device.  
   
   
       16 . A method of controlling a display device, comprising the steps of: 
 receiving a input data;    decoding a stored image to obtain decoded data;    accumulating the decoded data to obtain an accumulated value;    adding the accumulated value to the input data to obtain a compared value;    setting the display device to operate normally when the compared value is identical to an initial value; and    displaying a preset frame on the display device when the compared value differs from the initial value.    
   
   
       17 . The method of  claim 16 , wherein the input data and the original data are both a coded series.  
   
   
       18 . The method of  claim 16 , wherein the preset frame is a totally black screen or a totally white screen.  
   
   
       19 . The method of  claim 16 , wherein the stored frame can be preset by the user of the display device.  
   
   
       20 . A method of controlling a display device, comprising the steps of: 
 receiving a user's input data; and    determining whether the display device to operate normally or not according to the result of comparing the user's input data and internal data of the display device.    
   
   
       21 . The method of  claim 20 , wherein the user's input data includes an input code and the internal data of the display device includes a stored image, an original code and an initial value, and the step for determining whether the display device should operate normally comprises: 
 decoding the stored image to obtain a decoded data;    accumulating the decoded data to obtain an accumulated value;    setting the display device to operate normally when the input code and the original code are identical and the accumulated value is identical to the initial value; and    displaying a preset frame when the input code differs from the original code or the accumulated value differs from the initial value.    
   
   
       22 . The method of  claim 20 , wherein the user's input data comprises an input code and the internal data of the display device comprises a stored image, an original code and an initial value, and the step for determining whether the display device should operate normally comprises: 
 receiving an input data;    decoding a stored image to obtain a decoded data;    accumulating the decoded data to obtain an accumulated value;    adding the accumulated value to the input data to obtain a compared value;    setting the display device to operate normally when the compared value is identical to an initial value; and    displaying a preset frame when the compared value differs from the initial value.