RU2042208C1 - Device for cursor travel over display screen - Google Patents

Abstract

FIELD: computer engineering. SUBSTANCE: device for cursor travel over display screen has case 1, plotting board 4 with coordinate marks, coordinate pickup 5, button 6, microswitch 7, control element manufactured in the form of key head 2 with rod 3 on base made fast to plotting board mounted inside case for horizontal translation along coordinates. Translation of plotting board is recorded by coordinate pickup installed under plotting board. Control over translation of plotting board is conducted by finger or hand of operator set on key head. EFFECT: simplified design, improved reliability of control. 3 dwg

Description

 The invention relates to computer technology and is intended for the controlled movement of the cursor on the display screen. in particular, it can be used to enter information into a computer, i.e. can be used to enter not only coordinate, but also graphic and text information.

 A device for the controlled movement of the cursor on the display screen (patent PCT / US 88/04545, WO 89.06023, class G 06 K 11/06, 06/29/89). The device consists of a control plate made in the form of a disk protruding above the housing and elastically connected in its central part to the base of the housing. When you press the edge of the disk, it elastically tilts to the corresponding side due to the support in the center of the disk. The side of the slope and its value are recorded by special strain gauges connected to the disk and the housing, giving information about the direction and magnitude of the control action. The polar coordinates of the control action vector on the control disk are recorded by orthogonally oriented strain gauges that convert them to the corresponding Cartesian coordinates, which are control information about the location of the cursor on the display screen.

 This device, by its functional features, most closely corresponds to manipulators of the "joystick" type, since its control element has a stable equilibrium position, which it always comes under the action of elastic forces when the control action ceases to apply to it. Therefore, it is more convenient for the phasing process of the initial guidance to the desired point on the plane. This device is not very suitable for performing the procedure for correcting the exact installation because of the complexity of the exact installation procedure (for example, in graphic editors, artists never use “joystick” manipulators because of this feature). Another serious drawback of this device is the lack of control buttons on the lever. This entails the need to use the operator to control two hands simultaneously, one for the lever, the other for the buttons.

 A device of the type of "mouse" for the controlled movement of the cursor on the display screen and the transmission of control signals. The device has a housing that performs the function of a control element on which the buttons are located. For the mouse to work, a working surface is required, which is an obligatory additional component of the device and serves as the base on which the mouse manipulator is located. Inside the manipulator case there is a horizontal displacement sensor, consisting of two detectors X and Y, which determine mutually perpendicular linear displacements (respectively, X and Y axes) of the body relative to the working surface under the influence of the operator’s hand. In the case of moving the mouse, detectors X and Y generate electrical signals corresponding to a change in its position in Cartesian coordinates, which are control information about the location of the cursor on the display screen. Information about button presses is also transmitted.

 Closest to the invention in essence and the achieved result is a mouse optical input device (UK patent N 2214635, CL G 06 K 11/06, 09/06/89). In this manipulator, the horizontal displacement sensor is made in the form of an optical device consisting of a light source and two detectors-light detectors X and Y. A special tablet with marks in the form of a grid is superimposed on the working surface. The light coming from the light source is reflected from it and enters the detectors. If you move the body of the manipulator on the tablet, then on the way from the source to the X and Y light detectors, light is reflected from different points of the tablet in accordance with the movement. The detectors record the number of labels in the X- and Y-directions that hit the illuminated area when moving around the tablet, and generate electrical signals corresponding to the change in the position of the manipulator in Cartesian coordinates, which are control information about the location of the cursor on the display screen. Information about button presses is also transmitted.

 The disadvantages of this device are the low accuracy of fixing the location of the manipulator body on the tablet surface, since the muscles of the entire arm or hand are involved in the operator’s work, which limits the control accuracy, moreover, fingers are used to press the mouse buttons, as a result of which muscles of different system levels of the arm, hand and fingers are involved in controlling the mouse-type manipulator. A tablet for the device to work requires a special working space on the table surface, design features impose restrictions on the minimum device size of about 25 x 20 cm.

 The purpose of the invention is the expansion of the scope of the device by simplifying its design and more convenient control, increasing reliability, reducing its size, increasing sensitivity to control action and improving system integration. The size of the area of movement (degree of freedom) of the control element is consistent with the physiological characteristics of the index finger of a person’s hand and is small (about 1 cm), which makes the device portable, does not require a special working surface on the table. Small movements of the control element with your finger allow you to perform these movements with great accuracy and speed. The proposed design features allow you to expand the scope of the device, as it can be made in the form of a miniature unit or mounted in any other device due to its small size.

 The goal is achieved by the fact that in the device for moving the cursor on the display screen containing a housing, a tablet with coordinate marks, a coordinate sensor, a button, a control element is introduced, made in the form of a keyboard head, with a rod on the base, a window is made in the housing in which the window is installed the head of the keyboard head, and the base is rigidly connected to the tablet installed inside the case and secured with the possibility of translational horizontal movement along the coordinates, a recess under the button is made in the keyboard head, oordinat mounted under the plate within the housing.

 This combination of a keyboard head control with a button allows the operator to perform control actions (moving and pressing) with just one finger. Moreover, the control actions are performed in the form of gestures of only one finger, where the most accurate group of muscles of the human hand works. Since the working area of the impact of the finger is small (about 1 cm), this control device can have corresponding small sizes.

 In FIG. 1 shows a device in section; figure 2 section aa in figure 1; figure 3 shows the sensor of horizontal movements of the tablet.

 A device for moving the cursor on the display screen consists of a housing 1, a keyboard head 2 with a rod 3 on the base, a tablet 4 with coordinate marks on a reflective surface, a coordinate sensor 5, a button 6, a microswitch 7. The movement of the keyboard head 2 is limited in the plane by four guide rods 8. The sliding clamps 9 connect the tablet 4, the rod 8 and the housing 1 to each other. The tablet 4 with coordinate marks, which is a reflective surface, is rigidly connected by the rod 3 to the keyboard head 2. Under the tablet 4, inside the housing 1, a coordinate sensor 5 is mounted, consisting of a light source 10, a ball lens 11, and a photodetector 12. Photodetector 12, in turn, contains two detector-light receiver 13 and 14, which are oriented mutually perpendicularly and separately record the linear movement of the tablet 4.

 The device operates as follows.

 Management is carried out by a finger of a hand. The finger is mounted on the button 6. With a small force of the finger on the button in the horizontal direction, the keyboard head 2 is moved in the desired direction. Through the rod 3, the movements are transmitted respectively to the tablet 4, which moves relative to the coordinate sensor 5. The system of four rods 8, interconnected by four sliding clamps 9 and connected with the tablet 4, provides the mobility of the keyboard head 2 in the horizontal direction and prevents random rotation of the tablet. The movement of the tablet 4 in the horizontal direction is recorded by the detector detectors 13 and 14. The detectors register the movement of the corresponding number of marks on the reflective surface of the tablet 4 in the X- and Y-directions that hit the illuminated area when moving the tablet, and generate electrical signals corresponding to the change in the position of the tablet in Cartesian coordinates. These signals are control information about the location of the cursor on the display screen. Information about pressing the button 6 is also transmitted. At the right time, the operator can press the button 6 with the microswitch 7. By combining the movement of the keyboard head 2 and pressing the button 6, the desired control effect can be achieved. Management is performed by gestures of one finger, combining the movement of the keyboard head 2 and pressing the button 6.

 The results of patent studies have shown that this device meets the eligibility criteria.

Claims (1)

 DEVICE FOR MOVING THE CURSOR ON THE DISPLAY SCREEN, comprising a housing, a tablet with coordinate marks, a coordinate sensor, a button, characterized in that a control element is implemented in the device, made in the form of a keyboard head with a rod on the base, a window in which the rod is mounted in the housing the keyboard head, and the base is rigidly fixed on the tablet installed in the housing with the possibility of translational horizontal movement along the coordinates, a button is installed on the keyboard head, the coordinate sensor is located under tablet inside the case.

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