the first embodiment of the present invention will be described with reference to fig1 to 3 . fig1 is a block diagram showing the structure of a display device according to the first embodiment of the present invention . the display device of the first embodiment is used for perusing electronic book data recorded in a built - in information medium . in fig1 , reference numeral 101 denotes a display portion , reference numeral 102 denotes an information storage portion , reference numeral 103 denotes a control portion and reference numeral 104 denotes a detection portion . the display portion 101 is a very thin display device such as a liquid crystal panel and an organic el panel . the information storage portion 102 is a recording medium such as a flash memory or a cd - rom , and stores information such as electronic book data . the control portion 103 is constituted of a microcomputer or the like , and has a roll of controlling each portion connected to the control portion 103 . the detection portion 104 detects an external stimulus to the display device and supplies a detection signal to the control unit 103 . fig2 is a perspective view of the display device according to the first embodiment of the present invention . as shown in fig2 , since the display portion 101 is thin , the whole device has a very thin structure . circuit components of the control unit 103 and the like are concentratedly disposed in a peripheral area of the display portion or disposed on the rear surface of the display portion 101 . the display device can therefore be handled with ease , as if the display portion 101 itself is the whole display device . the detection portion 104 is disposed in regions 201 , 202 and 203 shown in fig2 . the region 201 is a center of gravity area ( a surface opposite to the display surface ) of the device , the region 202 is upper / lower / right / left sides of the device , and the region 203 is an area near one corner of the device . next , description will be made on an example of the operation of the device having the structure shown in fig1 . the control portion 103 reads out information recorded in the information storage portion 102 and displays it on the display portion 101 . for example , a user carries electronic book data such as a map and peruses it . if the user wants to update the display of the electronic book data , e . g ., if the user wants to scroll the display area of a map , this embodiment attains this data update by lightly shaking the device in a scroll direction . fig3 is a diagram illustrating the operation of the device according to the first embodiment . the detection portion 104 is constituted of a speed sensor disposed in the center of gravity area of the display device , and detects a shake direction and a shake width of the device . the speed sensor can be realized easily by using a gyro member , which is used by an anti - vibration mechanism of a camera or the like . the control portion 103 receives the shape direction and width detected with the speed sensor , reads electronic information from the information storage portion 102 in accordance with the values of the shake direction and width , and displays the display contents on the display portion 101 . according to the first embodiment , although the detection portion 104 is constituted of a speed sensor , if it is constituted of an acceleration sensor , a shake and a vibration of the device can be detected to realize the operation similar to the first embodiment . if the detection portion 104 is constituted of an angular velocity sensor , a shake and a rotation of the device can be detected to realize the operation similar to the first embodiment . the second embodiment will be described . the block diagram of fig1 is also used for the second embodiment . a difference of the operation will be described with reference to fig4 . fig4 is a diagram illustrating the operation of the second embodiment of the present invention . the detection portion 104 is constituted of a touch sensor and detects an impact applied to the side of the device . for example , in this embodiment , if a user wants to update the display area of a map displayed on the display portion 101 from the lower area to the upper area , the display is scrolled by lightly hitting the lower side of the device against a desk or the like . similarly , a scroll in another direction can be realized by hitting an upper , right or left side against the desk or hitting it with a hand . the third embodiment will be described . the block diagram of fig1 is also used for the third embodiment . a difference of the operation will be described with reference to fig5 a and 5b . fig5 a and 5b are diagrams illustrating the operations of the third embodiment of the present invention . the detection portion 104 is constituted of twist sensors disposed on the upper and lower side surfaces of the display device , and detects a deformation of the display device body . for example , as shown in fig5 a , the twist sensor detects a deformation of rolling up inward the display surface , and a map displayed on the display portion 101 is reduced in size in accordance with a detection signal from the twist sensor , or the map is enlarged in size by detecting a deformation of rolling up outward the display surface . similarly , as shown in fig5 b , a twist sensor is disposed in an area near a lower right corner of the device , and a displayed page can be turned over by an intuitive operation of rolling up the corner of the device . the scope of the present invention also includes a display device which detects a deformation of the device with twist sensors and corrects a strain of the display portion 101 to be caused by the device body deformation to thereby improve a visual recognition . the fourth embodiment will be described . fig6 is a block diagram showing the structure of the display device according to the fourth embodiment of the present invention . the display device of the fourth embodiment is a portable apparatus for perusing electronic information such as data of html received via a communication path . in fig6 , reference numeral 101 denotes a display portion , reference numeral 105 denotes a communication portion , reference numeral 103 denotes a control portion and reference numeral 104 denotes a detection portion . similar to the other embodiments described above , in the fourth embodiment , information displayed on the display portion 101 is updated in accordance with a shake , a deformation or an impact of the body , detected with the detection portion 104 . a different point is that information to be displayed on the display portion 101 is supplied by the communication portion 105 externally from the display device . namely , the control portion 103 receives a detection signal from the detection portion 104 , and when a display update is necessary , requests the communication portion 105 for new electronic information . the communication portion supplies the control portion 103 with electronic information acquired through communications with an external display apparatus . the control portion 103 displays the new electronic information on the display portion to complete the display update . the fifth embodiment will be described . fig7 is a block diagram showing the structure of the display device according to the fifth embodiment of the present invention . the display device of the fifth embodiment is an image pickup device such as a digital camera for capturing a subject image and reproducing and displaying the image . in fig7 , reference numeral 101 denotes a display portion , reference numeral 102 denotes an information storage portion , reference numeral 103 denotes a control portion , reference numeral 104 denotes a detection portion and reference numeral 106 denotes an image pickup portion . the fifth embodiment has an image pickup mode of capturing a subject image and storing image data in the information storage portion and a reproduction mode of reproducing image data stored in the information storage portion 102 and displaying it on the display portion 101 . similar to the other embodiments described above , in the reproduction mode , in accordance with an external stimulus detected with the detection portion 104 , the contents displayed on the display portion 101 are updated . for example , the reproduced image is displayed in a magnified size in accordance with a body deformation , and a reproduction speed is changed or the image is reproduced in a reverse direction in accordance with a body shake . in the image pickup mode , in accordance with a detection signal detected with the detection portion 104 , a hand shake is detected to correct the vibration of the captured image . in addition to the embodiments described above , the invention may be applied to a system constituted of a plurality of apparatuses ( e . g ., a host computer , an interface device , a liquid panel and the like ) or a single apparatus . as described above , it is possible to provide a display device which is easy to use intuitively and very compact without using operation buttons or the like . many widely different embodiments of the present invention may be constructed without departing from the scope of the present invention . it should be understood that the present invention is not limited to the specific embodiments described in the specification , except as defined in the appended claims . this application claims priority from japanese patent application no . 2003 - 413723 filed dec . 11 , 2003 , which is hereby incorporated by reference herein .