Terminal device and program

Abstract

To ensure display stability in changing a setting parameter of a display.SOLUTION: A terminal device (handy terminal 10) comprises: a display 14; a setting unit (CPU 11) that selectively sets a setting parameter of the display 14 to any one of a plurality of predetermined setting parameters, and that sets the setting parameter while display on the display 14 is stopped; and a control unit (CPU 11) that performs display output on the display 14 according to the setting parameter set by the setting unit.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a terminal device and a program. [Background technology]

[0002] Conventionally, there are known techniques for automatically applying setting information required for using a device. For example, Patent Document 1 describes controlling the drive voltage of a liquid crystal display panel in accordance with the ambient temperature. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-185932 Summary of the Invention [Problem to be solved by the invention]

[0004] However, if the drive voltage of the liquid crystal display panel is changed while an image is being displayed on the liquid crystal display panel, the image display may become unstable.

[0005] An object of the present invention is to ensure display stability when changing the setting parameters of the display unit. [Means for solving the problem]

[0006] In order to solve the above problem, the terminal device of the present invention comprises a display unit, a setting unit that selectively sets the setting parameters of the display unit to one of a plurality of predetermined setting parameters, the setting unit setting the setting parameters when display on the display unit is stopped, and a control unit that displays on the display unit using the setting parameters set by the setting unit. [Effects of the Invention]

[0007] According to the present invention, display stability can be ensured when setting parameters of the display unit are changed. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a front view of a handheld terminal according to an embodiment of the present invention; [Figure 2] FIG. 2 is a block diagram showing the functional configuration of the handheld terminal. [Figure 3] FIG. 2 is a block diagram showing the configuration of a display unit. [Figure 4] FIG. 2 is a diagram showing the contents of a first setting parameter, a second setting parameter, and a third setting parameter. [Figure 5] 10 is a flowchart showing a startup control process. [Figure 6] 10 is a flowchart showing a control process during startup. [Figure 7] FIG. 4 is a diagram illustrating an example of a display screen displayed on a display unit. [Figure 8] FIG. 10 is a diagram illustrating an example of a setting screen displayed on a display unit. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that the embodiments described below are subject to various limitations that are technically preferable for implementing the present invention, but the scope of the present invention is not limited to the following embodiments and illustrated examples.

[0010] An embodiment of the present invention will be described with reference to Figs. 1 to 8. First, the device configuration of this embodiment will be described with reference to Figs. 1 and 2. Fig. 1 is a front view of a handheld terminal 10 of this embodiment. Fig. 2 is a block diagram showing the functional configuration of the handheld terminal 10.

[0011] As shown in FIG. 1, a handheld terminal 10 as a terminal device in this embodiment is a portable terminal used by a user, such as a clerk at a store such as a supermarket or a mass retailer, or a worker at a warehouse. Products stored in a store, warehouse, or the like are assumed to be affixed with symbols such as barcodes or two-dimensional codes that contain encoded product information about the product, such as product identification information. The handheld terminal 10 reads the symbols affixed to the products and obtains product information as decoded data obtained by decoding the symbols. For example, a user uses the handheld terminal 10 to perform tasks that involve reading symbols, such as taking inventory of products in a store or warehouse.

[0012] The handheld terminal 10 includes an operation unit 12, a display unit 14, and a scanner unit 17. The operation unit 12 accepts operation inputs from a user. The operation unit 12 has a key group 12A and a touch panel 12B. The key group 12A has a plurality of keys as operation elements that accept press inputs from the user. The key group 12A includes a power key 120, a function key 121, trigger keys 122 and 123, etc.

[0013] The power key 120 is a key that receives an input from the user to turn on the power to the handheld terminal 10, and is located on the right side of the handheld terminal 10. The function key 121 is a key that receives various inputs from the user, and is located on the front of the handheld terminal 10. The trigger keys 122 and 123 are keys that receive an input to turn on the scanner unit 17 to read a symbol. The trigger key 122 is located on the left side of the handheld terminal 10. The trigger key 123 is located on the right side of the handheld terminal 10.

[0014] The touch panel 12B is formed integrally on the display panel 141 of the display unit 14, and is an operation element that accepts touch input from a user's finger or the like. The touch panel 12B is a touch panel of a capacitance type, a resistive film type, or the like. The display unit 14 has the display panel 141, and displays various display information on the display panel 141. The scanner unit 17 is an image scanner of an imaging type for reading symbols, and is disposed in front of the handheld terminal 10 (upper part in FIG. 1). The scanner unit 17 is a digital camera unit that has an imaging element such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) image sensor, an optical system, etc., and generates and outputs image data of an imaged subject (symbol).

[0015] Next, the internal functional configuration of the handheld terminal 10 will be described with reference to Fig. 2. The handheld terminal 10 includes a CPU (Central Processing Unit) 11, an operation unit 12, a RAM 13, a display unit 14, a storage unit 15, a wireless communication unit 16, a scanner unit 17, and a temperature detection unit 18. The various units of the handheld terminal 10 are connected via a bus B.

[0016] The CPU 11 controls each part of the handheld terminal 10. The CPU 11 reads out a specified program from among various programs, including a system program, stored in the storage unit 15, expands it in the RAM 13, and executes various processes in cooperation with the expanded program. As described above, the operation unit 12 has a key group 12A and a touch panel 12B. The operation unit 12 accepts operation input from the user, such as key input to the key group 12A or touch input to the touch panel 12B, and outputs the operation information to the CPU 11. The RAM 13 is a volatile semiconductor memory from which information can be read and written, provides a working area for the CPU 11, and temporarily stores data and programs.

[0017] 3 shows the configuration of the display unit 14. The display unit 14 includes a display panel 141, a driver IC (Integrated Circuit) 142, a power supply IC 143, and a backlight 144. The display panel 141 is an LCD (Liquid Crystal Display) display panel. The driver IC 142 generates a drive voltage for driving the display panel 141 based on a power supply voltage supplied from the power supply IC 143 and in response to a control signal transmitted from the CPU 11. The driver IC 142 also switches on / off the switching elements of each pixel in response to the control signal transmitted from the CPU 11 to perform display on the display panel 141. The backlight 144 includes LEDs (Light Emitting Diodes) and the like, and irradiates the entire surface of the display panel 141 with light from the rear side of the display panel 141 under the control of the CPU 11.

[0018] Under the control of the CPU 11, the display unit 14 can adjust the drive voltage of the display panel 141, the frame rate of screen switching on the display panel 141, the operating frequency of the driver IC 142, and the screen brightness achieved by light emission from the backlight 144. The display mode of the display unit 14 can be switched between a normal display mode and a dimming mode. The normal display mode is a display mode with normal brightness. The dimming mode is a display mode with lower brightness than the normal display mode. The display unit 14 forms a display image on the display panel 141 in accordance with various display information input from the CPU 11 and the like, and transmits light output from the backlight 144 through the display panel 141 to display various display information.

[0019] The storage unit 15 is configured with a flash memory or the like, is a storage unit that can read and write information, and stores various data and programs. The storage unit 15 stores a startup control program P1 for executing a startup control process (described later) and a startup control program P2 for executing a startup control process (described later).

[0020] The storage unit 15 also stores setting parameters for the display unit 14 shown in Fig. 4, which are setting parameters for a low temperature (first setting parameter), a room temperature (second setting parameter), and a high temperature (third setting parameter). As shown in Fig. 4, the setting parameters for the display unit 14 include at least a drive voltage for the display panel 141. The setting parameters for the display unit 14 may also include a frame rate for switching screens on the display panel 141, an operating frequency of the driver IC 142, and a screen brightness due to light emission from the backlight 144.

[0021] The operating temperature range of the handheld terminal 10 is, for example, -20°C to 50°C, which is wider than that of devices such as smartphones. Therefore, the first setting parameters are values ​​that ensure display stability and display visibility on the display unit 14 when the handheld terminal 10 is used, for example, when the temperature inside the housing of the handheld terminal 10 is 0°C (first temperature) or lower. In the first setting parameters, the drive voltage of the display panel 141 is a first drive voltage, the frame rate for screen switching is a first frame rate, the operating frequency of the driver IC 142 is a first operating frequency, and the screen brightness in the normal display mode is a first brightness. The second setting parameters are values ​​that ensure display stability and display visibility on the display unit 14 when the handheld terminal 10 is used, for example, when the temperature inside the housing of the handheld terminal 10 is higher than 0°C (first temperature) and lower than 40°C (second temperature). In the second setting parameters, the drive voltage of the display panel 141 is a second drive voltage, the frame rate for screen switching is a second frame rate, the operating frequency of the driver IC 142 is a second operating frequency, and the screen brightness in the normal display mode is a second brightness. In addition, the third setting parameters are values ​​that can ensure display stability and display visibility in the display unit 14 when the handheld terminal 10 is used, for example, when the temperature inside the housing of the handheld terminal 10 is higher than 40°C (second temperature). In the third setting parameters, the drive voltage of the display panel 141 is a third drive voltage, the frame rate for screen switching is a third frame rate, the operating frequency of the driver IC 142 is a third operating frequency, and the screen brightness in the normal display mode is a third brightness.

[0022] The wireless communication unit 16 is a wireless communication unit for a WLAN (Wireless Local Area Network) or a WAN (Wide Area Network), and includes an antenna for the WLAN or WAN, an oscillator, a modulator / demodulator, an amplifier, a signal processor, etc. The wireless communication unit 16 performs wireless communication with a base station or an access point on a communication network (not shown) in accordance with instructions from the CPU 11. The CPU 11 communicates with external devices on the communication network via the wireless communication of the wireless communication unit 16.

[0023] In accordance with instructions from CPU 11, scanner unit 17 captures an image of a symbol as a subject, generates image data as scan data, and outputs the image data to CPU 11. For example, scanner unit 17 captures an image of a symbol attached to a product in a store, warehouse, etc., and generates image data of the symbol. CPU 11 decodes the image data of the symbol to generate decoded data, and reads product information from the decoded data.

[0024] The temperature detection unit 18 detects the temperature inside the housing of the handheld terminal 10 and outputs the temperature to the CPU 11. In this embodiment, the temperature detection unit 18 is provided in a battery pack (not shown) that supplies power to each unit of the handheld terminal 10, but may also be provided on a board on which the CPU 11 is mounted. Alternatively, the temperature detection unit 18 may be provided inside the display panel 141.

[0025] The handheld terminal 10 may also be configured to include an imaging unit separate from the scanner unit 17, a communication unit using another communication method such as NFC (Near Field Communication), a sound output unit using a speaker, a light output unit such as an LED, etc.

[0026] Next, the operation of the handheld terminal 10 will be described. Fig. 5 shows a flowchart illustrating the startup control process. In the handheld terminal 10, the CPU 11 executes the startup control process in accordance with the startup control program P1 stored in the storage unit 15, triggered by the following events. Specifically, the trigger is when the user presses the power key 120 to switch from a power-off state to a power-on state. Alternatively, the trigger is when the user performs a predetermined operation via the operation unit 12 to switch from a sleep mode state to an active state (standby state).

[0027] (Start-up control processing) First, the CPU 11 acquires the temperature of the handheld terminal 10 from the temperature detection unit 18 (step A1). Next, the CPU 11 determines whether the temperature of the handheld terminal 10 acquired in step A1 is 0°C or lower (step A2). If the temperature of the handheld terminal 10 is 0°C or lower (step A2; YES), the CPU 11 supplies power supply voltage to the display unit 14 (step A3). Next, the CPU 11 applies low temperature setting parameters as setting parameters for the display unit 14, generates a display image on the display panel 141, turns on the backlight 144 (step A4), and ends the startup control process.

[0028] On the other hand, if the temperature of the handy terminal 10 is higher than 0°C (step A2; NO), the CPU 11 determines whether the temperature of the handy terminal 10 is 40°C or lower (step A5). If the temperature of the handy terminal 10 is 40°C or lower (step A5; YES), the CPU 11 supplies power supply voltage to the display unit 14 (step A6). Next, the CPU 11 applies the room temperature setting parameters as the setting parameters for the display unit 14, generates a display image on the display panel 141, turns on the backlight 144 (step A7), and ends the startup control process.

[0029] Furthermore, if the temperature of the handheld terminal 10 is higher than 40°C (step A5; NO), the CPU 11 supplies power supply voltage to the display unit 14 (step A8). Next, the CPU 11 applies high temperature setting parameters as setting parameters for the display unit 14, generates a display image on the display panel 141, turns on the backlight 144 (step A9), and ends the startup control process.

[0030] In steps A4, A7, and A9 of the startup control process, the CPU 11 sets the setting parameters based on the temperature of the handy terminal 10 before the display unit 14 displays anything when the handy terminal 10 (terminal device) is started up.

[0031] Next, the startup control process shown in Fig. 6 will be described. During startup of the handheld terminal 10, the CPU 11 executes the startup control process in accordance with the startup control program P2 stored in the storage unit 15. At the start of the startup control process, the display mode of the display unit 14 is the normal display mode.

[0032] (Control processing during startup) First, the CPU 11 determines whether or not a predetermined time (e.g., 5 minutes) has passed since the user performed no operation on the operation unit 12 (step B1). If the predetermined time has not passed since the user performed no operation on the operation unit 12 (step B1; NO), the CPU 11 returns the in-boot control process to step B1.

[0033] On the other hand, if the no-operation state continues for a predetermined time (step B1; YES), the CPU 11 reduces the screen brightness by emitting light from the backlight 144 and sets the display mode of the display unit 14 to the dimming mode (step B2). Next, the CPU 11 executes steps A3 and A4, which are similar to steps A1 and A2 of the startup control process described above. If the temperature of the handheld terminal 10 is 0°C or lower (step B4; YES), the CPU 11 determines whether the currently set setting parameters for the display unit 14 are low-temperature setting parameters (step B5). If the low-temperature setting parameters are set as the setting parameters for the display unit 14 (step B5; YES), the CPU 11 sets the display mode of the display unit 14 to the normal display mode and transitions the startup control process to step B1. Note that if the determination in step B5 is YES, the display mode of the display unit 14 may be maintained in the dimming mode, and the processes from step B3 onward may be performed again when a predetermined time has passed without any operation.

[0034] On the other hand, if the currently set setting parameters of display unit 14 are not low-temperature setting parameters (step B5; NO), CPU 11 stops display on display panel 141 and turns off backlight 144 to turn off the screen (step B6). Next, CPU 11 applies the low-temperature setting parameters as setting parameters of display unit 14, generates a display image on display panel 141, turns on backlight 144 (step B7), and ends the startup control process. In this way, by changing the setting parameters of display unit 14 in the dimming mode, which is entered when no operation is performed for a predetermined period of time, it is possible to prevent the setting parameters of display unit 14 from being changed while the user is operating operation unit 12. Note that the above-mentioned process of changing the setting parameters of display unit 14 may be executed after a predetermined time has elapsed since the display mode of display unit 14 was entered into the dimming mode.

[0035] Furthermore, if the temperature of the handheld terminal 10 is higher than 0°C (step B4; NO), the CPU 11 determines whether the temperature of the handheld terminal 10 is 40°C or lower (step B8). If the temperature of the handheld terminal 10 is 40°C or lower (step B8; YES), the CPU 11 determines whether the currently set setting parameters of the display unit 14 are setting parameters for room temperature (step B9). If the setting parameters for room temperature are set as the setting parameters of the display unit 14 (step B9; YES), the CPU 11 sets the display mode of the display unit 14 to the normal display mode and transitions the startup control process to step B1. Note that if the determination in step B9 is YES, the display mode of the display unit 14 may be maintained in the dimming mode, and the processes from step B3 onward may be performed again when a predetermined time has elapsed without any operation.

[0036] On the other hand, if the currently set setting parameters of display unit 14 are not the room temperature setting parameters (step B9; NO), CPU 11 stops the display on display panel 141 and turns off backlight 144 to turn off the screen (step B10). Next, CPU 11 applies the room temperature setting parameters as the setting parameters of display unit 14, generates a display image on display panel 141, turns on backlight 144 (step B11), and ends the startup control process. In this way, by changing the setting parameters of display unit 14 in the dimming mode, it is possible to prevent the setting parameters of display unit 14 from being changed while the user is operating operation unit 12. Note that the above-mentioned process of changing the setting parameters of display unit 14 may be executed after a predetermined time has elapsed since the display mode of display unit 14 was switched to the dimming mode.

[0037] Furthermore, if the temperature of the handheld terminal 10 is higher than 40°C (step B8; NO), the CPU 11 determines whether the currently set setting parameters of the display unit 14 are setting parameters for high temperatures (step B12). If the setting parameters of the display unit 14 are set to setting parameters for high temperatures (step B12; YES), the CPU 11 sets the display mode of the display unit 14 to the normal display mode and transitions the startup control process to step B1. Note that if the determination in step B12 is YES, the display mode of the display unit 14 may be maintained in the dimming mode, and the processes from step B3 onward may be performed when a predetermined time has elapsed again without any operation.

[0038] On the other hand, if the currently set setting parameters of display unit 14 are not high-temperature setting parameters (step B12; NO), CPU 11 stops display on display panel 141 and turns off backlight 144 to turn off the screen (step B13). Next, CPU 11 applies high-temperature setting parameters as setting parameters of display unit 14, generates a display image on display panel 141, turns on backlight 144 (step B14), and ends the startup control process. In this way, by changing the setting parameters of display unit 14 in the dimming mode, it is possible to prevent the setting parameters of display unit 14 from being changed while the user is operating operation unit 12. Note that the above-mentioned process of changing the setting parameters of display unit 14 may be performed after a predetermined time has elapsed since the display mode of display unit 14 was switched to the dimming mode.

[0039] In the above-mentioned control process during startup, the CPU 11 reduces the screen brightness of the display unit 14 if there is no operation on the operation unit 12 for a predetermined time, and then in steps B7, B11, and B14, displays on the display unit 14 according to the set setting parameters. Also, in the above-mentioned control process during startup, if the setting parameters based on the temperature of the handy terminal 10 (terminal device) are the same as the currently set setting parameters, the CPU 11 does not change the setting of the setting parameters.

[0040] Note that CPU 11 may execute the following process instead of steps B1 and B2 of the above-described in-boot control process. Specifically, CPU 11 determines whether a predetermined time (e.g., one hour) has elapsed while the same display screen is displayed on display unit 14. If the predetermined time has elapsed while the same display screen is displayed, CPU 11 executes the processes from step B3 onward. In this case, CPU 11 may display a message such as "Screen adjustment will now be performed" on display unit 14.

[0041] Furthermore, the CPU 11 may execute the following processes instead of steps B1 and B2 of the above-described control process during startup. Specifically, when the user presses the power key 120, the CPU 11 displays an OFF button 14b for instructing power-off and an ADJUST button 14c for instructing screen adjustment on the display screen 14a (see FIG. 7) of the display unit 14. Next, the CPU 11 accepts a touch operation on the ADJUST button 14c by the user via the operation unit 12. When the CPU 11 accepts the touch operation on the ADJUST button 14c, it executes the processes from step B3 onward. In other words, the touch operation on the ADJUST button 14c is an instruction operation to detect the temperature of the handheld terminal 10 (terminal device) by the temperature detection unit 18. The CPU 11 functions as a first accepting unit.

[0042] Furthermore, CPU 11 may display setting screen 14d (see FIG. 8) on display unit 14 and accept an operation by the user via operation unit 12 to select one of a first setting parameter, a second setting parameter, and a third setting parameter, which are setting parameters for display unit 14. CPU 11 functions as a second accepting unit. Upon accepting the setting parameter selection operation, CPU 11 stops the display on display panel 141 and turns off backlight 144, thereby turning off the screen. Next, CPU 11 applies the setting parameter selected by the user as the setting parameter for display unit 14, generates a display image on display panel 141, and turns on backlight 144.

[0043] Furthermore, the CPU 11 may accept a user's selection of a manual mode or an automatic mode for setting the setting parameters of the display unit 14. The manual mode is a mode in which the setting parameters of the display unit 14 are set based on a user operation accepted by the first or second accepting unit. The automatic mode is a mode other than the manual mode in which the setting parameters of the display unit 14 are set by executing the startup control process and the startup control process.

[0044] In steps A4, A7, and A9 of the startup control process and steps B7, B11, and B14 of the in-startup control process, the CPU 11 selectively sets the setting parameters of the display unit 14 to one of a plurality of predetermined setting parameters while the display on the display unit 14 is stopped. The CPU 11 functions as a setting unit. Furthermore, the CPU 11 performs display on the display unit 14 according to the set setting parameters. The CPU 11 functions as a control unit.

[0045] As described above, the terminal device (handy terminal 10) of this embodiment includes a display unit 14, a setting unit (CPU 11) that selectively sets the setting parameters of the display unit 14 to one of a plurality of predetermined setting parameters, the setting unit setting the setting parameters while the display on the display unit 14 is stopped, and a control unit (CPU 11) that performs display on the display unit 14 according to the setting parameters set by the setting unit. Therefore, when the setting parameters of the display unit are changed while an image is being displayed on the display unit, it is possible to prevent the display of the image from becoming unstable. This ensures display stability when the setting parameters of the display unit are changed.

[0046] In the terminal device (handheld terminal 10) of this embodiment, the control unit (CPU 11) reduces the screen brightness of the display unit 14 when there is no operation on the operation unit 12 for a predetermined time, and then displays on the display unit according to the setting parameters set by the setting unit (CPU 11). This allows the display unit 14 to redisplay according to appropriate setting parameters when the user is not using the handheld terminal 10.

[0047] The terminal device (handheld terminal 10) of this embodiment includes a temperature detection unit 18 that detects the temperature of the terminal device, and the setting unit (CPU 11) sets setting parameters based on the temperature of the terminal device detected by the temperature detection unit 18. This allows appropriate setting parameters to be set on the display unit 14 based on the temperature of the handheld terminal 10.

[0048] In the terminal device (handheld terminal 10) of this embodiment, the setting unit (CPU 11) sets the setting parameter to a first setting parameter when the temperature of the terminal device is equal to or lower than a first temperature, sets the setting parameter to a second setting parameter when the temperature of the terminal device is higher than the first temperature and equal to or lower than a second temperature, and sets the setting parameter to a third setting parameter when the temperature of the terminal device is higher than the second temperature. This allows appropriate setting parameters to be set on the display unit 14 based on the temperature of the handheld terminal 10.

[0049] In the terminal device (handy terminal 10) of this embodiment, when the terminal device is started up, the setting unit (CPU 11) sets setting parameters based on the temperature of the terminal device before displaying on the display unit 14. This makes it possible to prevent the display of an image from becoming unstable when the setting parameters of the display unit are changed while the image is being displayed on the display unit.

[0050] In the terminal device (handy terminal 10) of this embodiment, if the setting parameters based on the temperature of the terminal device are the same as the currently set setting parameters, the setting unit (CPU 11) does not change the setting parameters. In this case, the display on the display unit 14 is stopped, and the process of displaying the setting parameters again can be omitted.

[0051] The terminal device (handy terminal 10) of this embodiment includes a first reception unit (CPU 11) that receives an instruction to detect the temperature of the terminal device by the temperature detection unit 18, and the temperature detection unit 18 detects the temperature of the terminal device when the instruction is received by the first reception unit. This allows the user to reset the setting parameters of the display unit 14 at a desired timing.

[0052] The terminal device (handy terminal 10) of this embodiment includes a second reception unit (CPU 11) that receives a selection operation of a setting parameter, and the setting unit (CPU 11) sets the setting parameter based on the selection operation of the setting parameter received by the second reception unit, thereby allowing the user to display the display unit 14 with the desired setting parameter.

[0053] In the terminal device (handy terminal 10) of this embodiment, the setting parameters include the drive voltage of the display unit 14. This makes it possible to prevent the display of an image from becoming unstable when the drive voltage of the display unit 14 is changed while the image is being displayed on the display unit 14.

[0054] In the terminal device (handy terminal 10) of this embodiment, the setting parameters include at least one of the frame rate for screen switching of the display unit 14, the drive frequency of the display unit 14, and the screen brightness of the display unit 14. This makes it possible to prevent the display of an image from becoming unstable when at least one of the frame rate for screen switching of the display unit 14, the drive frequency of the display unit 14, and the screen brightness of the display unit 14 is changed while the image is being displayed on the display unit 14.

[0055] In the above description, an example has been disclosed in which a storage unit 15 such as a flash memory is used as a computer-readable medium for the program according to the present invention, but this is not limiting. Other computer-readable media may also be used, such as other non-volatile memories and portable recording media such as CD-ROMs. Furthermore, a carrier wave may also be used as a medium for providing the program data according to the present invention via a communication line.

[0056] The above-described embodiment is merely an example of the terminal device and program according to the present invention, and the present invention is not limited thereto. For example, in the above-described embodiment, the CPU 11 applies the first setting parameter, the second setting parameter, or the third setting parameter as the setting parameter of the display unit 14 during the startup control process and the startup control process to perform display, but the present invention is not limited thereto. The CPU 11 may apply a fourth parameter different from the first setting parameter, the second setting parameter, and the third setting parameter to perform display.

[0057] Although the embodiments of the present invention have been described, the scope of the present invention is not limited to the above-described embodiments, but includes the scope of the invention described in the claims and its equivalents. [Explanation of symbols]

[0058] 10...Handy terminal (terminal device), 11...CPU (setting unit, control unit), 14...Display unit

Claims

1. A display unit; a setting unit that selectively sets a setting parameter of the display unit to one of a plurality of predetermined setting parameters, the setting unit setting the setting parameter while display on the display unit is stopped; a control unit that displays on the display unit according to the setting parameters set by the setting unit; A terminal device comprising:

2. The terminal device according to claim 1, wherein the control unit reduces the screen brightness of the display unit when there is no operation on the operation unit for a predetermined period of time, and then displays on the display unit according to the setting parameters set by the setting unit.

3. a temperature detection unit that detects the temperature of the terminal device; The terminal device according to claim 1 , wherein the setting unit sets the setting parameters based on the temperature of the terminal device detected by the temperature detection unit.

4. The terminal device described in claim 3, wherein the setting unit sets the setting parameter to a first setting parameter when the temperature of the terminal device is equal to or lower than a first temperature, sets the setting parameter to a second setting parameter when the temperature of the terminal device is higher than the first temperature and equal to or lower than a second temperature, and sets the setting parameter to a third setting parameter when the temperature of the terminal device is higher than the second temperature.

5. The terminal device according to claim 3 , wherein the setting unit sets the setting parameters based on the temperature of the terminal device when the terminal device is started up and before the display unit displays the setting parameters.

6. The terminal device according to claim 3 , wherein the setting unit does not change the setting of the setting parameter when the setting parameter based on the temperature of the terminal device is the same as the currently set setting parameter.

7. a first reception unit that receives an instruction operation to cause the temperature detection unit to detect the temperature of the terminal device; The terminal device according to claim 3 , wherein the temperature detection unit detects the temperature of the terminal device when the instruction operation is accepted by the first acceptance unit.

8. a second reception unit that receives a selection operation of the setting parameter; The terminal device according to claim 1 , wherein the setting unit sets the setting parameter based on a selection operation of the setting parameter accepted by the second accepting unit.

9. The terminal device according to claim 1 , wherein the setting parameters include a drive voltage for the display unit.

10. The terminal device according to claim 9 , wherein the setting parameters include at least one of a frame rate for switching screens on the display unit, a drive frequency of the display unit, and a screen brightness of the display unit.

11. A computer of a terminal device having a display unit, a setting unit that selectively sets a setting parameter of the display unit to one of a plurality of predetermined setting parameters, the setting unit setting the setting parameter while display on the display unit is stopped; a control unit that displays on the display unit according to the setting parameters set by the setting unit; A program that functions as a

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