CN1750103A

CN1750103A - Initializing method of mobile communication terminal liquid crystal display

Info

Publication number: CN1750103A
Application number: CNA2005100052685A
Authority: CN
Inventors: 俞赫浚; 崔仁燮
Original assignee: LG Electronics China Research and Development Center Co Ltd
Current assignee: LG Electronics China Research and Development Center Co Ltd
Priority date: 2004-09-13
Filing date: 2005-02-03
Publication date: 2006-03-22
Also published as: KR20060024219A; KR100664143B1

Abstract

The present invention discloses an initialization method used in the liquid crystal display device of mobile communication terminal, and can support the interrupt handling of calling signal in the initialization procedure of liquid crystal display device. When the indicator element adopt by the mobile communication terminal-liquid crystal display device is in the initialization process, it is carried out by the following process: when the liquid crystal display device begins to initialize, so as to the arrangement based on the previous inputting order is in the stable state and the next order is in the wait state, additionally crate and preserve the time-lapse function whose order of priority is lower; when the liquid crystal display device is in the process of initialization, read the time-lapse function which is additionally crated and preserved; when it is in the time-lapse process risen from reading the time-lapse function, in case of the affair or the signal is interrupted, suspend the operation of the time-lapse function, when the interruption of the signal is disposed, continue to operate the time-lapse function, to execute the initialization of the liquid crystal display device.

Description

A kind of initial method of mobile communication terminal liquid crystal display

Technical field

The present invention relates to a kind of initial method of mobile communication terminal liquid crystal display, more specifically, relate to and a kind ofly be used for the LCD of mobile communication terminal, for and the initialization of long film transistor type (TFT:thin film transistor) LCD of initialization time of comparing of super-twist nematic (STN:supertwisted nematic) LCD, as order device is in before the steady state (SS) based on previous input, think that the time-delay routine that makes Next Command input be in holding state and adopt forms the lower time-delay routine of signal interruption priority and uses, thereby can be supported in the initial method of the mobile communication terminal liquid crystal display that carries out the call signal Interrupt Process that taken place in the LCD initialization procedure.

Background technology

Generally speaking, in mobile communication terminal for display message (telephone number input, character message demonstration, schedule, phone directory), LCD is adopted as display element, popularize the initial stage in terminal and mainly adopted the stn liquid crystal display, and arrived recently, along with terminal can be carried out various additional functions, majority has adopted the TFT LCD.

But the problem that exists in the TFT LCD is, and is bigger than stn liquid crystal display electric consumption, and, need to consume long initialization (device stabilization) time in order to run well.

Promptly, situation for the stn liquid crystal display, as shown in Figure 1, import after the various command in order to carry out initialization, because the corresponding reaction time is very fast, between each instruction, do not need special time-delay routine, but situation for the TFT LCD, because the reaction time (being used for the stabilising arrangement required time) corresponding to instruction is comparatively slow, therefore, before the operation that finishes based on this order, in order to prevent the input of other order, as shown in Figure 2, between instruction, adopt special time-delay routine.

In above-mentioned LCD initialization, adopted the function (clk_busy_wait) that provides by modem chip (MSM chip) as the time-delay routine, in fact, as shown in Figure 3, about above-mentioned delay function (clk_busy_wait), because its priority (for example: UI Task is in general task, HS task) higher level, perhaps according to circumstances be in same priority, therefore, in the LCD initialization, called under the state of above-mentioned delay function (clk_busy_wait), main task (Maintask) can not have been received by the variety of event of other task generation or the problem of signal interruption information occurring.

That is, under time-delay state, when the call signal interruption has taken place,, will make the user can't receive the problem of phone because can not carry out the call signal Interrupt Process based on above-mentioned delay function.

Summary of the invention

Therefore, technical matters to be solved by this invention is to provide a kind of initial method of mobile communication terminal liquid crystal display, for the LCD that is used in the mobile communication terminal, compared when initialization time, long TFT LCD was carried out initialization if adopted with the stn liquid crystal display, as order device is in before the steady state (SS) based on previous input, think that the time-delay routine that makes Next Command input be in holding state and adopt forms the lower time-delay routine of signal interruption priority and uses, carry out the call signal Interrupt Process that taken place in the LCD initialization procedure thereby can be supported in.

To achieve these goals, when the present invention carries out initialization to display element-LCD that mobile communication terminal adopted, it is characterized in that, when comprising the steps: the LCD initialization, in order to make device be in steady state (SS) and make the Next Command input be in holding state, generate and preserve the lower delay function of priority separately based on previous input command; When carrying out the LCD initialization, read the above delay function that generates separately and preserve; In the time-delay process that produces based on the above delay function that reads,, temporarily stop the operation of delay function, handle after corresponding signal interrupts, continue the operation delay function, to carry out the LCD initialization if when generation incident or signal interruption.

Adopt the initial method of mobile communication terminal liquid crystal display of the present invention, reached and to be supported in the effect of carrying out the call signal Interrupt Process that taken place in the LCD initialization procedure.

Description of drawings

Fig. 1 is the relevant LCD initialization procedure precedence diagram that the mobile communication terminal of existing stn liquid crystal display is housed;

The relevant LCD initialization procedure precedence diagram that the mobile communication terminal of existing TFT LCD is housed of Fig. 2;

Fig. 3 is relevant terminal running state key diagram based on priority between existing delay function and the different task;

Fig. 4 calls out the delay function illustration figure that generates for reducing priority among relevant the present invention;

Fig. 5 is relevant terminal running state key diagram based on priority between delay function of the present invention and the different task.

Embodiment

Below in conjunction with accompanying drawing, preferred embodiment of the present invention is elaborated.

At first, when each constituent element that is each accompanying drawing is added identifier,,, also adopt identical symbol even if appear in other accompanying drawing for identical constituent element.

And, in the following description, provide for complete understanding the present invention such as multiple specific details such as concrete treatment schemees, for the professional in present technique field, can not need these specific detailed contents and implement the present invention.

Moreover, for outstanding core content of the present invention, omit generally acknowledging the detailed description of function and formation.

Fig. 4 calls out the delay function illustration figure that generates for reducing priority among relevant the present invention, as mentioned above, based on TFT LCD characteristic, the start or from electric save mode (Power Savingmode, when Sleep mode) recovering operate as normal, need carry out initialization operation to LCD, and comprising in this initialization function inside be different from the stn liquid crystal display carry out element stabilization and the required various time-delay factors of power management, for this reason, when the delay function (clk_busy_wait) that provides by modem chip self is provided, exist the problem that to hold the signal interruption that is taken place in this delay function invoked procedure.And in the present invention, produce delay function more flexibly, make it in time to handle the signal interruption that takes place in the operational process, thereby, also can tackle the signal interruption situation flexibly even if run into the long situation of time-delay by reducing priority.

As the delay function that shows among Fig. 4 is the situation of having utilized the FOR repetitive cycling, it has adopted the count value (ms) of at first specifying corresponding to the time of preparing to postpone, arrive this count value (ms) before, make variable (cnt) since 0 mode of counting, as shown in Figure 5, its priority is set to be same as or is lower than other general task (for example: UI Task, HS Task).

Promptly, as the delay function that utilizes the FOR repetitive cycling that shows among above-mentioned Fig. 4, owing to carry out independently task (Task dependent) operation, except being called of task, can also from other task, receive institute's event and signal interruption is handled with identical priority.

In other words, in the prior art, situation for the delay function (clk_busy_wait) that provides from modem chip (MSM chip), need stop modem chip (MSM) integral body and implement time-delay, and make not interrupt run and implement time-delay of modem chip (MSM) in the present invention, therefore can tackle other incident and the signal interruption that is taken place in the time-delay process.

As described above, initial method by a kind of mobile communication terminal liquid crystal display provided by the invention, for the LCD that is used in the mobile communication terminal, when having adopted that the initialization time of comparing with the stn liquid crystal display, long TFT LCD was carried out initialization, as order device is in before the steady state (SS) based on previous input, think that the time-delay routine that makes Next Command input be in holding state and adopt forms the lower time-delay routine of signal interruption priority and uses, can be supported in the effect of carrying out the call signal Interrupt Process that taken place in the LCD initialization procedure thereby reached.

Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.

Claims

1. the initial method of a mobile communication terminal liquid crystal display, it is characterized in that, when display element-LCD that mobile communication terminal adopted is carried out initialization, when comprising the steps: the LCD initialization, in order to make device be in steady state (SS) and make the Next Command input be in holding state, generate and preserve the lower delay function of priority separately based on previous input command; When carrying out the LCD initialization, read the above delay function that generates separately and preserve; In the time-delay process that produces based on the above delay function that reads,, temporarily stop the operation of delay function, handle after corresponding signal interrupts, continue the operation delay function, to carry out the LCD initialization if when generation incident or signal interruption.

2. the initial method of a kind of mobile communication terminal liquid crystal display according to claim 1 is characterized in that, more than the delay function that generates separately be to have utilized FOR round-robin function.

3. the initial method of a kind of mobile communication terminal liquid crystal display according to claim 2, it is characterized in that, about above-mentioned FOR circulation, adopted a kind of count value of at first specifying, before arriving this count value, made variable realize the structure of delaying time since 0 mode of counting corresponding to the time of preparing to postpone.

4. the initial method of a kind of mobile communication terminal liquid crystal display according to claim 1 is characterized in that, the priority of above-mentioned delay function is set to be same as or is lower than other general task of terminal inner.

5. the initial method of a kind of mobile communication terminal liquid crystal display according to claim 1, it is characterized in that, above-mentioned delay function is owing to carry out independently task run, except the task of calling this function, can also tackle institute's event and signal interruption in other task with identical priority.