JP2008310836A - Information processing device and control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an operator having adequate operability for both of display devices or drive modes which respectively require different rewrite times. <P>SOLUTION: An information processing device includes: at least one display device; an operator that is displaced from a reference point; a displacement detection means that detects a displacement amount of the operator; a signal supply means that supplies at least one display device with a control signal for changing display in at least one display device, depending on the displacement amount detected by the displacement detection means; and a load control means that controls a load applied to the operator, depending on a display rewrite time per unit information amount in at least one display device. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an information processing apparatus having an operation element.

  Many devices equipped with a display are equipped with a rotary operator such as a jog dial (registered trademark). The rotary operation element includes a rotating body that rotates about an axis, a sensor that detects a rotation angle and a rotation amount, and converts the rotation angle into a signal. A device that is an object to be operated of the rotary operation element slides data to be referred to according to the amount of rotation. Therefore, an operator who operates this type of device must first rotate the rotary operator quickly to increase the amount of slide, and then slowly rotate it near the desired data. Thus, the data to be displayed on the display can be efficiently searched from among many others.

Patent Documents 1 and 2 are documents that disclose a mechanism for improving the operability of the operator. The input device disclosed in Patent Document 1 includes a tactile element and vibrates the tactile element when a selection icon on the display overlaps a selectable element. Further, the mouse disclosed in Patent Document 2 is equipped with a cover drive mechanism that drives the mouse cover up and down so that the height of the mouse cover is controlled according to the type of element on which the selection icons on the display overlap. It has become.
Japanese Patent No. 2571793 JP-A-6-102997

  In recent years, a display device using a memory-type display body called electronic paper has been developed. Since the memory-type display body maintains a display state without applying a voltage, there is an advantage that display can be performed with low power consumption. For example, a cholesteric liquid crystal or an electrophoretic display is used as the memory display.

In general, a memory-type display body has a drawback that it takes longer time to rewrite than a non-memory-type display body. As one approach for making up for this drawback, it is conceivable that electronic paper has a non-memory display such as TN (Twisted Nematic) liquid crystal. Alternatively, in addition to a normal drive mode in which display quality is high but rewrite is slow, there is also an approach of driving a memory display in a drive mode in which rewrite is fast even if display quality is low. In any case, with the technologies described in Patent Documents 1 and 2, it has been difficult to provide appropriate operability in any of the display device and the drive mode having different rewriting times.

  On the other hand, the present invention provides an operator having appropriate operability in either a display device or a driving mode having different rewriting times.

According to the present invention, at least one display device, an operation element that is displaced from a reference point, a displacement amount detection unit that detects a displacement amount of the operation element, and a displacement amount detected by the displacement amount detection unit Signal supply means for supplying a control signal for changing the display on the at least one display device to the at least one display device, and the operation element according to a display rewrite time per unit information amount in the at least one display device There is provided an information processing apparatus having a load control means for controlling a load applied to the computer.
According to this information processing device, the load applied to the operation element is controlled according to the display rewriting time per unit information amount in the display device.

In a preferred aspect, the information processing apparatus includes a plurality of display devices each having a different display speed, the signal supply unit supplies the control signal to any of the plurality of display devices, and the load control unit includes The load applied to the operation element may be controlled according to the supply destination of the control signal.
According to this information processing apparatus, the load applied to the operation element is controlled according to the supply destination of the control signal.

In another preferred embodiment, the information processing apparatus controls the load applied to the manipulator so that the load becomes smaller as the rewriting speed of the display device to which the control signal is supplied increases. May be.
According to this information processing apparatus, the load applied to the operator is controlled so that the load is reduced as the rewriting speed of the display device is increased.

In still another preferred embodiment, the information processing apparatus is configured such that one of the at least one display device can be driven in a plurality of drive modes having different display rewriting times per unit information amount, and the load control The means may control a load applied to the operation element according to a drive mode of the one display device among the plurality of drive modes.
According to this information processing apparatus, the load applied to the operator is controlled according to the drive mode of the display device.

In still another preferred embodiment, in this information processing apparatus, the load control means is configured to reduce the load applied to the operator so that the load is reduced as the rewriting speed of the display device driven in the drive mode increases. You may control.
According to this information processing apparatus, the load applied to the operator is controlled so that the load is reduced as the rewriting speed of the display device is increased.

In still another preferred embodiment, in this information processing apparatus, the one display device includes a display body using cholesteric liquid crystal, and the plurality of operation modes are a drive mode and a conventional method by a DDS (Dynamic Drive Scheme) method. May include a driving mode.
According to this information processing apparatus, the load applied to the operator is controlled according to whether the drive mode of the display apparatus is the DDS system or the conventional system.

In still another preferred embodiment, in the information processing apparatus, the load may be a force that prevents displacement of the operation element.
According to this information processing device, the force that hinders the displacement of the operation element is controlled in accordance with the display rewriting time per unit information amount in the display device.

In still another preferred embodiment, in the information processing apparatus, the load may be a displacement amount of the operation element necessary for display rewriting of the unit information amount in the display device.
According to this information processing apparatus, the amount of displacement of the manipulator necessary for display rewriting of the unit information amount in the display device is controlled according to the display rewriting time per unit information amount in the display device.

In yet another preferred embodiment, the information processing apparatus rewrites the display on the at least one display device each time the signal supply means exceeds a threshold value detected by the displacement amount detection means. You may supply the control signal to instruct | indicate.
According to this information processing apparatus, every time the amount of displacement exceeds the threshold value, a control signal for instructing rewriting of display on the display apparatus is supplied.

In still another preferred embodiment, in the information processing apparatus, the at least one display device may include a display body using cholesteric liquid crystal.
According to this information processing apparatus, the load applied to the operator is controlled in accordance with the display rewriting time per unit information amount in a display apparatus including a display using cholesteric liquid crystal.

In still another preferred aspect, the information processing apparatus may include a light emitting unit that emits light in synchronization with a supply timing of the control signal to the at least one display device.
In still another preferred aspect, the information processing apparatus may include a sound emitting unit that emits sound in synchronization with a supply timing of the control signal to the at least one display device.
According to this information processing apparatus, light or sound is output in accordance with the supply timing of the control signal.

In still another preferred embodiment, in this information processing apparatus, the operation element may be a rotary operation element that rotates about an axis, and the displacement amount may be a rotation amount of the operation element.
According to this information processing apparatus, the load applied to the rotary operator is controlled according to the display rewriting time per unit information amount in the display device.

Further, the present invention provides at least one display device, an operation element that is displaced from a certain reference point, a displacement amount detection means that detects a displacement amount of the operation element, and a control that changes a display on the at least one display device. A control method in an information processing apparatus having a signal supply means for supplying a signal to the at least one display device, wherein the rotating body is applied to the rotating body according to a display rewrite time per unit information amount in the at least one display device. A step of controlling a given load, and the signal supply means supplies a control signal for changing the display on the at least one display device to the display driving device according to the rotation amount detected by the rotation amount detection means. And a control method including steps.
According to this control method, the load applied to the operator is controlled according to the display rewriting time per unit information amount in the display device.

1. First Embodiment A first embodiment of the present invention will be described. In the present embodiment, selection of an image to be displayed on the display device of the information processing apparatus is performed by a rotary operator. Further, the display device is driven in one of two drive modes, a mode in which image quality is emphasized and a mode in which drive speed is emphasized. Further, the load of the rotary operation element is controlled according to the drive mode.

  FIG. 1 is a diagram illustrating a schematic hardware configuration of the information processing apparatus according to the present embodiment. FIG. 2 is a diagram illustrating an appearance of the information processing apparatus. As shown in FIG. 1, the information processing apparatus includes a main display unit 10 (display device), a push-down operation unit 20, a rotary operation unit 30, and a control unit 40 that controls operations of these units.

  The main display unit 10 includes a cholesteric liquid crystal panel 11, a segment electrode drive circuit 12, and a common electrode drive circuit 13. The cholesteric liquid crystal panel 11 has a structure in which a cholesteric liquid crystal layer is sandwiched from above and below by two glass substrates provided with transparent electrodes. Among these, the temperature sensor 91 is affixed in the approximate center position of the lower surface of the lower glass substrate. The information processing apparatus according to the present embodiment displays an image under the control of the control unit 40. Specifically, the control unit 40 applies a predetermined voltage to the transparent electrodes of both glass substrates of the cholesteric liquid crystal panel 11 via the segment electrode driving circuit 12 and the common electrode driving circuit 13, so that the alignment state of the cholesteric liquid crystal layer Transition.

  FIG. 3 is a diagram showing a cross section of the cholesteric liquid crystal panel 11 and an alignment state of the cholesteric liquid crystal. The cholesteric liquid crystal panel 11 includes an upper glass substrate 14, an upper transparent electrode 15, a cholesteric liquid crystal layer 16, a lower transparent electrode 17, a lower glass substrate 18, and a light absorbing plate 19. The transparent electrodes 15 and 17 function as a data electrode and a scanning electrode for applying a voltage to the cholesteric liquid crystal layer 16. Further, as shown in FIG. 2, the upper glass substrate 14 of the cholesteric liquid crystal panel 11 is exposed to the outside through the opening of the housing 90 of the display device.

  FIG. 4 is a diagram showing a configuration of the cholesteric liquid crystal panel 11. The cholesteric liquid crystal panel 11 has an n × m matrix wiring including n rows of scanning electrodes (Y1, Y2,..., Yn) and m columns of data electrodes (X1, X2,..., Xm). Note that n and m are positive integers. In the present embodiment, since the cholesteric liquid crystal panel 11 is a so-called passive matrix display device, the scanning electrodes and the data electrodes also function as scanning lines and data lines, respectively. An electro-optical element 16a is formed in a region where the scan electrode and the data electrode intersect (intersection of the scan electrode and the data electrode in FIG. 4). The electro-optic element 16a includes two electrodes (a data electrode (sometimes referred to as a pixel electrode or a segment electrode) and a scanning electrode (sometimes referred to as a common electrode or a common electrode), both of which are not shown). It has an electro-optic layer sealed in between. In the present embodiment, a liquid crystal layer including cholesteric liquid crystal that is memory liquid crystal is used as the electro-optical layer. A memory liquid crystal refers to a liquid crystal capable of maintaining a display without supplying power. A voltage corresponding to a voltage applied to the corresponding scanning electrode (hereinafter referred to as “scanning voltage”) and a voltage applied to the corresponding data electrode (hereinafter referred to as “data voltage”) is applied to the electro-optical element 16a. . The voltage applied to the electro-optic layer is called “driving voltage”. The optical properties (light application property, light scattering property, etc.) of the electro-optic layer vary depending on the applied voltage. The electro-optical element 16a forms an image by changing the optical properties of the liquid crystal. Note that one electro-optic element 16a basically corresponds to one pixel. In the case of a color display that performs color display in the RGB color system, one electro-optic element 16a corresponds to any one of RGB color components in a certain pixel.

  In FIG. 3, the alignment state of the electro-optical element 16a (cholesteric liquid crystal) includes planar alignment (hereinafter referred to as “P alignment”) shown in (a) and focal conic alignment (hereinafter referred to as “F alignment”) shown in (b). Transition between three orientation states of homeotropic orientation (hereinafter referred to as “H orientation”) shown in FIG. In the P orientation state, light incident from the side of the upper glass substrate 14 is reflected, and white is expressed. On the other hand, in the F orientation state, incident light is transmitted and reaches the light absorbing plate 19, so that black is expressed. It is also possible to represent halftones by transitioning to an intermediate orientation state between the P and H orientations. And once this P orientation and H orientation transition, even if there is no voltage application, the state will be maintained. Further, as described later in detail, when switching from the P orientation to the F orientation, it is necessary to undergo a transitional transition to the H orientation state, which is an orientation state that cannot be maintained without application of a voltage.

  In FIG. 1, a push-type operator 20 and a rotary operator 30 are operators for making various inputs. Both of these operators will be specifically described. The push-type operation element 20 is an operation element for converting a user's depression operation into a signal. The push-type operator 20 has two buttons 21 and 22 and a sensor (not shown) that detects whether or not they are pressed. As shown in FIG. 2, the buttons 21 and 22 of the push-down operation element 20 are exposed to the outside of the housing 90 of the display device.

  FIG. 5 is a side view of the rotary operation element 30. 6 is a view of the surface indicated by the arrow line A in FIG. 5 as viewed from above. The rotary operation element 30 is an operation element for converting a user's rotation operation into a signal. As shown in the figure, the rotary operation element 30 has a rotary knob 31, a rotary encoder 32, a load control unit 33, and a rotary shaft 34 for connecting them. The rotary knob 31 has a flat cylindrical shape, and has a hole that is opened upward from the approximate center of the lower end surface thereof. The upper end of the rotating shaft 34 is inserted into this hole. Thereby, the rotating shaft 34 is fixed to the rotating knob 31. As shown in FIG. 2, the rotary knob 31 is exposed to the outside of the housing 90 of the display device. On the upper end face of the rotary knob 31, a mark 31a indicating the rotation reference position is marked.

  The rotary encoder 32 includes a rotary slit disk 32a, a fixed plate 32b, and a light emitting element 32c and a light receiving element 32d that sandwich both the plates. The rotating slit disk 32a has a through hole at the center. A rotation shaft 34 is inserted into the through hole, and the rotation slit disk 32 a is fixed to the rotation shaft 34. The rotary slit disk 32a is provided with a so-called absolute pattern slit. The fixed plate 32b is fixed on the rotating slit disk 32a. The fixed plate 32b has a plurality of holes parallel to one of the lines extending radially from the rotating shaft. The light emitting element 32c has the same number of LEDs (Light Emitting Diodes) as the holes of the fixing plate 32b. The LEDs are fixed side by side directly above the holes of the fixing plate 32b. The light receiving element 32d has the same number of optical sensors as LEDs. The optical sensor is arranged in a position where it can receive light that has passed through the fixed plate 32b and the rotating slit disk 32a from the LED. By preparing and sequentially referring to a table that associates the angle of the rotating slit disk 32a with the binary data indicating the combination of the presence or absence of light reception by the optical sensor, the rotation of the rotating slit disk 32a from the light receiving state of the light receiving element 32d. The angle can be specified.

  The load control unit 33 includes a rotation prevention member 33a, an electromagnet 33b, and a magnetic force control circuit 33c. The rotation preventing member 33a has a substantially columnar base material and eight permanent magnets r fixed to the side surface at substantially equal intervals. The electromagnet 33b has an iron core and a coil wound around the iron core. The electromagnet 33b generates a magnetic force having a magnitude corresponding to the electric power supplied from the magnetic force control circuit 33c with the rotation preventing member 33a. Therefore, if this magnetic force is reduced, the rotational load of the rotary knob 31 is reduced. Conversely, if this magnetic force is increased, the rotational load of the rotary knob 31 is increased.

  FIG. 7 is a diagram showing a load-angle curve of the electromagnet 33b. FIG. 7 shows a state where the magnetic force is large (curve B) and a state where the magnetic force is small (curve C). An example in which the permanent magnet r is rotated until it is attracted is shown. According to FIG. 7, regardless of the magnitude of the magnetic force, the load gradually increases from the beginning of the rotation operation, and transitions so as to rapidly decrease when a certain angle is reached. And it turns out that the load in the high magnetic force state shown by the solid line B is higher than the load in the low magnetic force state shown by the chain line C, and it is difficult for the user to rotate.

Returning to the description of FIG. The control unit 40 includes an ADC (Analog / Digital Converter) 41, a segment power generation circuit 42, a common power generation circuit 43, a CPU 44, a RAM 45, a ROM 46, a main display unit drive control circuit 47, and an I / O controller 48. .
The ADC 41 converts an analog signal output from the temperature sensor 91, that is, a signal indicating the detected temperature into a digital signal. The ADC 41 supplies the CPU 44 with this digital signal, that is, a digital signal indicating the temperature at the substantially central position of the cholesteric liquid crystal panel 11. The segment power generation circuit 42 and the common power generation circuit 43 supply power to the segment electrode drive circuit 12 and the common electrode drive circuit 13, respectively.

  The CPU 44 performs various processing calculations using the RAM 45 as a work area. The ROM 46 stores various programs and tables to be described later. The I / O controller 48 controls the exchange of various signals between the push-down operation unit 20 and the rotary operation unit 30 and the CPU 44.

  Next, the load setting process and the image switching process in this embodiment will be described.

  FIG. 8 is a flowchart showing the load setting process. The process shown in FIG. 8 is triggered by the user operating the push-down operation element 20 to display the drive mode selection screen on the cholesteric liquid crystal panel 11 and selecting the drive mode via the screen. Is done.

  FIG. 9 is a diagram showing a drive mode selection screen. This screen is a screen for prompting selection of one of the high-speed drive mode and the low-speed drive mode. In addition, since the display apparatus of the information processing apparatus according to the present embodiment operates with the low-speed drive mode as a default, the low-speed drive mode is initially selected when the screen is displayed. The low-speed driving mode is a mode for driving the liquid crystal according to the conventional driving method, and it is desirable to select this mode when selecting when the image quality is more important than the driving speed. The high-speed drive mode is a mode in which the liquid crystal is driven according to the DDS drive method, and it is desirable to select this mode when driving speed is more important than image quality.

Here, the DDS driving method and the conventional driving method will be described.
FIG. 10 is a diagram illustrating a voltage application cycle in DDS driving. As shown in FIG. 10, in the DDS driving, the driving cycle of the cholesteric liquid crystal is a preparation period (
Reset period), Selection period (selection period), Evolution period (holding period), and Non Selection period (non-selection period). The cycle phase of each period is
The voltage is shifted for each scanning line Y of the image, and a voltage specific to each period is applied in a pipeline manner.

The drive voltage applied in each period of DDS drive will be specifically described. First, during the preparation period, a drive voltage is applied that causes all of the electro-optic elements 16a forming the line to be driven to transition to the H alignment state. During the selection period, the electro-optic element 16a of the line to be driven is maintained in the H alignment state or relaxed to a transient planar alignment (hereinafter referred to as "TP alignment") in which the helical structure of the liquid crystal molecules is slightly relaxed. A drive voltage for selecting whether to permit is applied. Further, during the evolution period, a driving voltage is applied to maintain the alignment state of the electro-optic element 16a having the H orientation and to make the electro-optic element 16a having the P orientation transition to the F orientation. In the non-selection period (non-selection period), the drive voltage is erased (strictly speaking, the voltage may not become zero). The alignment state of the cholesteric liquid crystal layer depends on the magnitude of the drive voltage applied during the selection period (selection period).
In the non-selection period (non-selection period), transition is made to one of the P orientation and the F orientation.

  FIG. 11 shows a reflectance-voltage curve of the cholesteric liquid crystal. Specifically, FIG. 11 shows the relationship between the drive voltage applied to the P-oriented and N-oriented cholesteric liquid crystals and the alignment state in which transition occurs after the drive voltage is rapidly removed. The vertical axis represents the reflectance, and the horizontal axis represents the drive voltage. The voltages V1 to V4 are drive voltage thresholds for changing the alignment state. When the cholesteric liquid crystal is in the P-alignment state, while the drive voltage from V1 to V2 is applied, the transparency gradually increases as the drive voltage increases, and the transparency increases. A certain black color appears. And while applying the drive voltage of V2 to V3, F orientation state is maintained. While the drive voltage from V3 to V4 is applied, the reflectivity increases again from the F alignment state to the H alignment state. On the other hand, when the cholesteric liquid crystal is in the F alignment state, the alignment state does not transition while a drive voltage from V1 to V3 is applied. While the drive voltage from V3 to V4 is being applied, the reflectance is increased by changing from the F alignment state to the H alignment state. Therefore, in the DDS drive, the alignment state that transitions in the subsequent period is determined according to the magnitude of the drive voltage applied to each electro-optic element 16a in the preparation period.

FIG. 12 is a diagram showing transition of the alignment state of the cholesteric liquid crystal. First, Preparation
In the period, when a driving voltage of V4 or more is applied, the electro-optic element 16a that has been in the P alignment state or the F alignment state transitions to the H alignment state. In the selection period, a driving voltage corresponding to the orientation state of the color to be expressed is applied. That is, a drive voltage of V2 or higher is applied to express white, and a drive voltage of V1 or lower is applied to represent black. When a drive voltage equal to or lower than V1 is applied, the state first transitions to the TP alignment state. Further, when a drive voltage of V4 or less is applied in the evolution period, the state transitions to the F orientation state, and this state is maintained until the next drive cycle. On the other hand, when a drive voltage of V2 or higher is applied during the selection period, the H alignment state is maintained as it is. When a driving voltage capable of maintaining the H alignment state is applied in the subsequent evolution period, and when the driving voltage is rapidly removed in the subsequent non-selection period, the state shifts to the P alignment state. The P orientation state is maintained until the next driving cycle.

  On the other hand, the conventional driving method is a method in which a unique voltage is applied to each scanning line of the image one by one. Since this method is widely known, a detailed description of the driving cycle and applied voltage is omitted.

  A description will be given with reference to FIG. 8 again. In step S110, the CPU 44 monitors whether or not a drive mode is selected on the drive mode selection screen. When the drive mode is selected, an identifier for identifying the selected drive mode is stored in the RAM 45. CPU44 advances a process to step S120.

  In step S120, the CPU 44 determines whether or not the drive mode has been changed from the default low-speed drive mode to the high-speed drive mode. When the mode is changed to the high-speed drive mode, the CPU 44 advances the process to step S130. If the mode has not been changed to the high-speed drive mode, the CPU 44 advances the process to step S140.

  In step S <b> 130, the CPU 44 supplies a signal for setting the load control unit 33 to a high load state to the magnetic force control circuit 33 c via the I / O controller 48. Receiving this signal, the magnetic force control circuit 33c supplies the electromagnet 33b with the power necessary to apply the load indicated by the solid line B in FIG.

  In step S <b> 140, the CPU 44 supplies a signal for setting the load control unit 33 to the low load state to the magnetic force control circuit 33 c via the I / O controller 48. Upon receiving this signal, the magnetic force control circuit 33c supplies the electromagnet 33b with electric power necessary to apply the load indicated by the chain line C in FIG. 7 to the rotary knob 31.

  FIG. 13 is a flowchart showing the image switching process. While the series of processes shown in FIG. 13 is being performed, the I / O controller 48 continues to supply the CPU 44 with a signal indicating the rotation amount and rotation direction of the rotary knob 31 detected by the rotary encoder 32.

In step S <b> 210, the CPU 44 monitors whether or not the rotation amount indicated by the signal supplied from the I / O controller 48 has reached the image switching threshold angle stored in the RAM 45. When the rotation amount reaches the threshold value, the CPU 44 advances the process to step S220.
In step S <b> 220, the CPU 44 acquires a digital signal indicating the temperature detected by the temperature sensor 91 from the ADC 41.

In step S230, the CPU 44 refers to the identifier stored in the RAM 45 and determines which of the low speed driving mode and the high speed driving mode is selected.
If it is determined in step S230 that the high-speed drive mode is selected, the CPU 44 reads the high-speed drive mode parameters from the table in the ROM 46 in step S240. The “high-speed drive mode parameter” is a parameter that determines the waveforms of the black and white drive voltages (V1 to V4 threshold values shown in FIG. 10) prepared in advance for the high-speed drive mode. On the other hand, if it is determined that the low speed drive mode is selected, the CPU 44 reads out the low speed drive mode parameters from the table of the ROM 46 in step S250. The “low-speed drive mode parameter” is a parameter that determines the waveforms of the black and white drive voltages prepared in advance for the low-speed drive mode.

  The threshold value indicated by the parameter stored in this table is obtained based on actual measurement as a value that causes the transition of the alignment state of the cholesteric liquid crystal at the reference temperature (for example, 25 ° C.).

When the parameter is read, the CPU 44 changes the parameter according to the detected temperature (S260). Specifically, the threshold values V1 and V2 of the voltage applied in the selection period of FIG. 10 are changed according to the detected temperature.

Here, the reason why the threshold value is changed according to the detected temperature will be described with reference to FIG.
FIG. 14 is a diagram schematically showing the relationship between the selection voltage and the reflectance of the cholesteric liquid crystal. The horizontal axis represents voltage and the vertical axis represents reflectance. The reflectance is a relative luminance when the reflection luminance of a standard white plate serving as a reference is 100%. A high reflectivity means that the cholesteric liquid crystal is close to the P orientation and whiteness is strong, and a low reflectivity is that the cholesteric liquid crystal is close to the F orientation and blackness is strong. Means that. As shown in FIG. 14, the voltage for changing the reflectance of cholesteric liquid crystal to 100% (white) and the voltage for changing to 0% (black) shift to a higher voltage side as the temperature increases, and decrease as the temperature decreases. Shift to the voltage side. As described above, since the reflectance-voltage characteristic of the cholesteric liquid crystal depends on the temperature, a configuration is adopted in which the drive parameter is changed according to the detected temperature.

  A description will be given with reference to FIG. 13 again. In step S270, the CPU 44 similarly changes the parameter read in step S250 according to the detected temperature.

  When the parameter is changed in step S260 or step S270, in step S280, the CPU 44 specifies image data to be displayed on the cholesteric liquid crystal panel 11 from a series of image data stored in the ROM 46, and acquires the specified image data. To do. The image data is specified as follows. First, the ROM 46 stores a plurality of pieces of image data in association with respective unique file names. In step S280, if the file names are arranged in ascending order, the image file corresponding to the file name in the reference order before or after the image currently displayed on the cholesteric liquid crystal panel 11 is specified. Whether the image file corresponding to the file name before or after the reference order is specified depends on which rotation direction the rotary knob 31 is rotated.

  In step S290, the CPU 44 supplies the image data acquired in step S280 and the parameters changed in step S260 or step S270 to the main display unit drive control circuit 47. When the image data and parameters are supplied, the main display unit drive control circuit 47 specifies each waveform of the drive voltage that causes the alignment state of the cholesteric liquid crystal to transition according to the parameters. The main display unit drive control circuit 47 specifies the color of the pixel of each main scanning line of the image to be displayed based on the image data. Further, the main display unit drive control circuit 47 sequentially supplies a control signal for changing the orientation state of the electro-optic element 16 a corresponding to each pixel to the segment power generation circuit 42 and the common power generation circuit 43. Accordingly, the orientation state of the electro-optical element 16a sequentially changes line by line in accordance with one of the DDS driving and the conventional driving. When all the lines have been changed, the image rewriting is completed.

  In the present embodiment described above, whether the rotation load of the rotary operation element that is an operation element for instructing switching of the image displayed on the main display unit is selected between the high speed drive mode and the low speed drive mode. Switch accordingly. Therefore, a load corresponding to the drive mode is provided to the rotary operation element.

2. Second Embodiment A second embodiment of the present invention will be described. In the present embodiment, the information processing apparatus includes a sub display unit (second display device) separately from the main display unit (first display device). The sub display unit uses a display body having characteristics different from those of the cholesteric liquid crystal, specifically, a liquid crystal having a different rewriting speed. The operation target of the rotary operation element can be selected from the main display unit and the sub display unit. In the rotary operation element, the magnitude of the angle serving as the threshold value for image switching is controlled according to whether the operation target is the main display unit or the sub display unit. Further, the light blinks each time the rotation is detected by operating the rotary operation element. Thereby, the visibility of the operation by the user is improved.

  The main display unit 10 is a main display of electronic paper and has features such as high definition and low power consumption. Taking advantage of this feature, the main document is often displayed, and the user often reads the contents carefully. However, the main display unit 10 has a low rewrite speed. Therefore, display rewriting is rewriting of the entire page (or a part of the page), and scrolling is not performed. On the other hand, the sub display unit 50 is an auxiliary display and can be rewritten at high speed. Therefore, the sub display unit 50 is used for displaying auxiliary information such as an operation menu, a file search window, and bibliographic information of a document displayed on the main display. Since the sub-display can be rewritten at high speed, scrolling may be performed according to the operation of the rotary operator. However, the sub-display unit 50 has characteristics of low resolution, high power consumption, and a narrow screen, and is not suitable for displaying a main document.

  FIG. 15 is a schematic hardware configuration diagram of the information processing apparatus according to the present embodiment. FIG. 16 is a diagram illustrating an appearance of the information processing apparatus. As illustrated in FIG. 15, the information processing apparatus includes a sub display unit 50 and an LED 60 in addition to the main display unit 10, the push-down operation unit 20, the rotary operation unit 30, and the control unit 40. In addition to the ADC 41, the segment power generation circuit 42, the common power generation circuit 43, the CPU 44, the RAM 45, the ROM 46, the main display unit drive control circuit 47, and the I / O controller 48, the control unit 40 drives the sub display unit. A control circuit 49 is included. In addition, since the detailed structure of the main display part 10 is the same as 1st Embodiment, illustration is abbreviate | omitted.

The LED 60 is an optical element that emits light upon receiving a signal from the I / O controller 48. As shown in FIG. 16, the LED 60 is exposed to the outside of the housing 90 of the display device.
The sub display unit 50 is different from the main display unit 10 in that a display body (for example, nematic liquid crystal) having higher resistance to temperature change and driving speed than cholesteric liquid crystal is used. Further, as shown in FIG. 2, the upper glass substrate of the liquid crystal panel of the sub display unit 50 is exposed to the outside through the opening of the housing 90 of the display device.

The sub display unit drive control circuit 49 in the control unit 40 supplies a control signal to the sub display unit 50 to display an image on the liquid crystal panel.
In the information processing apparatus according to the present embodiment, the structure of the rotary operation element 30 is different from that of the first embodiment. The structure of the rotary operation element 30 will be described in detail with reference to FIGS. 17 and 18.

  FIG. 17 is a side view of the rotary operation element 30. 18 is a view of the surface indicated by the arrow D in FIG. 17 as viewed from above. Since the structure of the rotary knob 31 and the rotary encoder 32 constituting the rotary operation element 30 is the same as that of the first embodiment, the description thereof is omitted.

  The load control unit 33 shown in the figure includes a gear 33e, a hard sphere 33f, a spring 33g, and an actuator 33h. The gear 33e has a through hole at the center. A rotation shaft 34 is inserted into the through hole, and the gear 33 e is fixed to the rotation shaft 34. The gear 33e and the hard sphere 33f are connected via a spring 33g. The actuator 33h adjusts the ineffective force that presses the hard sphere 33f against the side surface of the gear 33e by moving between the direction approaching the gear 33e and the opposite direction.

  When the actuator 33h moves away from the gear 33e and the rigid sphere 33f is completely separated from the side surface of the gear 33e as shown in FIG. 18A, the rotational load of the rotary knob 31 becomes almost zero. Then, when the actuator 33h moves in a direction approaching the gear 33e from this state, the hard sphere 33f contacts the side surface of the gear 33e, and the load that prevents rotation when the hard sphere 33f fits into one of the splines (grooves) on the side surface. Is granted. As shown in FIG. 18B, when the actuator 33h further moves in the direction approaching the gear 33e, the rotational load of the rotary knob 31 connected to the gear 33e via the rotary shaft 34 becomes larger.

An image switching process that is a characteristic process of the present embodiment will be described.
FIG. 19 is a flowchart showing the image switching process. While the series of processing shown in the figure is being performed, the I / O controller 48 continues to supply a signal indicating the rotation amount and rotation direction of the rotary knob 31 detected by the rotary encoder 32 to the CPU 44. In addition, the information processing apparatus according to the present embodiment controls the main display unit 10 and the sub display unit 50 having a lower priority than that using different software.

  In step S310, the CPU 44 determines whether software for controlling the main display unit 10 is activated. If it is determined that the software for controlling the main display unit 10 is activated (S310: YES), in step S320, the CPU 44 sets the angle of the image switching threshold stored in the RAM 45 to 45 degrees. . Thereafter, the CPU 44 stores image data to be displayed on the cholesteric liquid crystal panel 11 every time the rotation amount of the rotary knob 31 specified based on the signal supplied from the I / O controller 48 reaches the threshold value of 45 degrees. Is acquired from the series of image data stored in the image data and supplied to the main display unit drive control circuit 47. The procedure for acquiring image data is the same as that in step S280 in FIG. The main display unit drive control circuit 47 that has received the image data supplies a control signal for changing the orientation state of the electro-optic element 16a in accordance with the image data, and the segment power generation circuit 42 and the common power generation circuit 43. To rewrite the image of the cholesteric liquid crystal panel 11.

When the image switching threshold is set to 45 degrees, in step S330, the CPU 44 supplies a signal for setting the load control unit to the load application state via the I / O controller 48 to the actuator 33h. The actuator 33h that receives this signal moves in a direction approaching the gear 33e. When the actuator 33h moves in this way, a load that impedes the rotation of the rotary knob 31 is applied. When the signal is supplied to the actuator 33h, the CPU 44 returns the process to step S310.
If it is determined in step S310 that the software for controlling the main display unit 10 is not activated (S310: NO), in step S340, the CPU 44 is in a state in which the software for controlling the sub display unit 50 is activated. Judge whether there is.

  If it is determined that the software for controlling the sub display unit 50 is activated (S340: YES), in step S350, the CPU 44 sets the angle of the image switching threshold stored in the RAM 45 to 15 degrees. . Thereafter, the CPU 44 stores image data to be displayed on the cholesteric liquid crystal panel 11 every time the rotation amount of the rotary knob 31 specified based on the signal supplied from the I / O controller 48 reaches the threshold value of 15 degrees. Are acquired from the series of image data stored in the sub-display unit 50 and supplied to the sub-display unit 50.

  When the image switching threshold is set to 15 degrees, in step S360, the CPU 44 supplies a signal for setting the load control unit to the load removal state to the actuator 33h via the I / O controller 48. The actuator 33h receiving this signal moves in a direction away from the gear 33e. By this movement of the actuator 33h, a load that prevents the rotation of the rotary knob 31 is removed. When the signal is supplied to the actuator 33h, the CPU 44 returns the process to step S310.

  When determining that the software for controlling the sub display unit 50 is not activated (S340: NO), the CPU 44 waits for the supply of a signal from the I / O controller 48 in step S370. When a signal indicating the rotation angle is supplied (S370: YES), in step S380, the CPU 44 supplies a signal for instructing lighting to the LED 60 via the I / O controller 48. When this signal is supplied, the LED 60 is lit for a certain time. As a result, the LED blinks each time the rotary encoder 32 of the rotary operation element 30 detects the rotation of the rotary knob 31.

  According to the present embodiment described above, the image switching threshold is controlled according to whether the operation target is the main display unit or the sub display unit. The sub display unit has a higher driving speed than the main display unit, but the threshold for image switching is controlled according to the operation target. Therefore, a load corresponding to the operation target is provided to the rotary operation element.

3. Other Embodiments The present invention can be variously modified as described below. Two or more of the following modifications may be used in combination with the first embodiment or the second embodiment.

  In the first embodiment, the electromagnetic force that hinders the rotation of the rotary knob is increased in the high-speed driving mode in which the liquid crystal driving speed is fast, and the electromagnetic force is reduced in the low-speed driving mode in which the liquid crystal driving speed is slow. . As a result, the operation feeling of the rotary knob follows the drive speed of the liquid crystal. On the other hand, the angle serving as an image switching threshold may be switched depending on whether the high-speed driving mode or the low-speed driving mode is selected.

  In the second embodiment, when the sub display unit is operated through the rotation of the rotary knob, the rotation angle serving as the image switching threshold is reduced, and when the main display unit is operated, the rotation angle serving as the image switching threshold is increased. It was. As a result, the operation feeling of the rotary knob follows the drive speed of the liquid crystal. On the other hand, you may utilize an electromagnet similarly to 1st Embodiment. That is, the magnitude of the electromagnetic force that prevents the rotation of the rotary knob may be switched between when the sub display unit is the operation target and when the main display unit is the operation target.

  In the second embodiment, the operation target of the rotary operation element is two of the main display unit and the sub display unit, but three or more display units may be the operation target. That is, you may enable it to operate three or more display parts with one rotary operation element. In this case, the threshold value for image switching is switched according to which of them is the operation target.

  In the above embodiment, an example in which the rotary encoder of the load control unit is an absolute rotary encoder has been described. However, this may be an incremental rotary encoder. In the case of the incremental rotary encoder, the absolute angle when the rotary knob rotates cannot be detected, but the relative rotation amount can be detected. In this case, every time the relative rotation exceeds the threshold, an image file that is in the reference order before or after the currently displayed image may be specified.

  In the above embodiment, a series of image data displayed on the liquid crystal panel is stored in the ROM. However, a plurality of image data is stored in another storage device such as a flash ROM or a hard disk, and these are operated by a rotary operation. It may be specified according to the operation of the child and displayed on the liquid crystal panel.

  In the second embodiment, the LEDs are exposed from the casing of the liquid crystal display device. Through the blinking of the LED, the user is notified that the rotation amount of the rotary knob has exceeded the threshold angle. On the other hand, a speaker may be mounted instead of the LED, and the user may be notified that the rotation amount of the rotary knob has exceeded the threshold angle through the beep sound and the click sound emitted from the speaker.

  In the second embodiment, when the main display unit is the operation target of the rotary operation element, the image switching threshold is set to 45 degrees, and the sub display unit is the operation target of the rotary operation element. The image switching threshold was set to 15 degrees. However, the setting value of the angle is not limited to this. Other threshold values may be set as long as the setting angle when the main display unit becomes the operation target is larger than the setting angle when the sub display unit becomes the operation target.

  In the first embodiment, the load of the rotary operation element is switched in a binary manner depending on whether the driving mode is the high speed driving mode or the low speed driving mode. However, the driving speed of the liquid crystal can vary depending on the amount of image data itself to be displayed. Therefore, the subsequent load may be finely adjusted according to the data amount of the image data to be displayed. The configuration and operation of this modified example are conceptually described as follows: “information display body, storage means storing a plurality of image data, selection means for selecting a drive mode of the display body, and rotation about an axis. A rotating body, a rotation amount detecting means for detecting the rotation amount of the rotating body, and image data specified according to the detected rotation amount is read from the storage means, and the image data is displayed on the display body. A display control means for applying to the rotating body a load that impedes its rotation, wherein a reference amount of the magnitude of the applied load is specified according to the selection of the drive mode by the selection means, and the specified reference A rotary operation element including load applying means for adjusting the amount according to the data amount of the read image data.

  In the second embodiment, the image displayed on the main display unit 10 is not limited to the image of the main document. Auxiliary information such as a menu screen for operating the information processing apparatus may be displayed on the main display unit 10. In this case, the load may be switched according to the type of image to be displayed, such as increasing the load of the rotary operator when displaying a document and decreasing the load when displaying a menu.

  The load given to the rotary operator is not limited to that described in the first embodiment and the second embodiment. In other words, the “load” of the operator is a work necessary for rewriting the image of the unit information amount on the display device to be operated. Since work = force × displacement, the “load” of the operator means at least one of force and displacement necessary to display and rewrite the unit information amount image on the display device to be operated. . In short, the information processing apparatus according to the embodiment includes a rewriting speed, that is, a force necessary to displace the rotating body by a unit displacement amount according to a display rewriting time per unit information amount in the display device, and display rewriting. Any device may be used as long as it controls at least one of the displacement amounts necessary for instructing.

  In the above-described embodiment, an example in which the operation element is a rotary type has been described. However, the operation element is not limited to the rotary type. Outputs a signal according to the displacement of the operating element from a certain reference point (for example, rotating shaft, one end of the slide bar, the center of the trackball, etc.) Any configuration may be used as long as the controller is used.

  In the above-described embodiment, the example in which the display body used in the display device is a cholesteric liquid crystal layer has been described. However, the display body is not limited to cholesteric liquid crystals. An electrophoretic element or other memory display may be used. In addition, the number of display units included in the information processing apparatus is not limited to that exemplified in each embodiment. For example, in the first embodiment, the information processing apparatus may include two or more display units. In this case, it is only necessary that at least one of the plurality of display units can be driven in a plurality of drive modes having different rewriting speeds. For example, in the second embodiment, the information processing apparatus may include three or more display units. In this case, it suffices that at least one of the plurality of display units uses a display body having a different rewriting speed from the other display units.

It is a hardware schematic block diagram of a liquid crystal display device. It is an external view of a liquid crystal display device. It is a figure which shows the cross section of a cholesteric liquid crystal panel. It is a figure which shows a scanning line and a data line. It is a figure which shows the structure of a rotary operation element. It is a figure which shows the structure of a rotary operation element. It is a figure which shows the transition of the load (torque) of a rotary knob. It is a flowchart which shows a load setting process. It is a figure which shows a drive mode selection screen. It is a figure which shows DDS drive. It is a figure which shows the relationship between a drive voltage and the transition of an orientation state. It is a figure which shows the relationship between a drive voltage and the transition of an orientation state. It is a flowchart which shows an image switching process. It is a figure which shows typically the relationship between an applied voltage and a reflectance. It is a hardware schematic block diagram of a liquid crystal display device. It is an external view of a liquid crystal display device. It is a figure which shows the structure of a rotary operation element. It is a figure which shows the structure of a rotary operation element. It is a flowchart which shows an image switching process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Main display part, 11 ... Cholesteric liquid crystal panel, 12 ... Segment electrode drive circuit, 13 ... Common electrode drive circuit, 14 ... Upper glass substrate, 15 ... Upper transparent electrode, 16 ... Cholesteric liquid crystal, 17 ... Lower transparent electrode, DESCRIPTION OF SYMBOLS 18 ... Lower glass substrate, 19 ... Light absorption board, 20 ... Push-down operation element, 21 ... Button, 22 ... Button, 30 ... Rotary operation element, 32 ... Rotary encoder, 33 ... Load control part, 34 ... Rotating shaft , 40 ... control section, 41 ... ADC, 42 ... segment power generation circuit, 43 ... common power generation circuit, 44 ... CPU, 45 ... RAM, 46 ... ROM, 47 ... main display section drive control circuit, 48 ... I / O controller, 49 ... sub-display unit drive control circuit, 50 ... sub-display unit, 60 ... LED, 90 ... housing, 91 ... temperature sensor

Claims (14)

At least one display device;
An operator that is displaced from a reference point;
A displacement amount detecting means for detecting a displacement amount of the operation element;
Signal supply means for supplying the at least one display device with a control signal for changing the display on the at least one display device in accordance with the displacement amount detected by the displacement amount detection means;
An information processing apparatus comprising: a load control unit configured to control a load applied to the operation element in accordance with a display rewriting time per unit information amount in the at least one display device. A plurality of display devices each having a different display speed;
The signal supply means supplies the control signal to any of the plurality of display devices;
The information processing apparatus according to claim 1, wherein the load control unit controls a load applied to the operation element according to a supply destination of the control signal. The load control means controls the load given to the operation element so that the load becomes smaller as the rewriting speed of the display device to which the control signal is supplied becomes higher. Information processing device. One of the at least one display device can be driven in a plurality of drive modes having different display rewriting times per unit information amount,
2. The information processing apparatus according to claim 1, wherein the load control unit controls a load applied to the operation element in accordance with a drive mode of the one display device among the plurality of drive modes. . The load control means controls the load applied to the operation element so that the load becomes smaller as the rewriting speed of the display device driven in the drive mode becomes higher. Information processing device. The one display device includes a display using cholesteric liquid crystal,
The information processing apparatus according to claim 4, wherein the plurality of operation modes include a drive mode based on a DDS (Dynamic Drive Scheme) system and a drive mode based on a conventional system. The information processing apparatus according to claim 1, wherein the load is a force that prevents displacement of the operation element. The information processing apparatus according to claim 1, wherein the load is a displacement amount of the operation element necessary for display rewriting of the unit information amount in the display device. The signal supply means supplies a control signal for instructing rewriting of display on the at least one display device every time the displacement detected by the displacement detection means exceeds a threshold value. Item 4. The information processing apparatus according to Item 1. The information processing apparatus according to claim 1, wherein the at least one display device includes a display body using cholesteric liquid crystal. The information processing apparatus according to claim 1, further comprising: a light emitting unit configured to emit light in synchronization with a supply timing of a control signal to the at least one display device. The information processing apparatus according to claim 1, further comprising a sound emitting unit configured to emit sound in accordance with a supply timing of a control signal to the at least one display device. The operation element is an operation element that rotates about an axis;
The information processing apparatus according to claim 1, wherein the displacement amount is a rotation amount of the operation element. At least one display device, an operation element that is displaced from a reference point, a displacement amount detection means that detects a displacement amount of the operation element, and a control signal that changes a display on the at least one display device. A control method in an information processing apparatus having signal supply means for supplying to a display device,
Controlling a load applied to the rotating body according to a display rewriting time per unit information amount in the at least one display device;
A control method comprising: a step of supplying, to the display drive device, a control signal for changing the display on the at least one display device in accordance with the rotation amount detected by the rotation amount detection unit.

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