The present invention relates to hanging type switchable anti-peeping devices, and more particularly, to a hanging type switchable anti-peeping device externally applied on a screen for preventing others from peeping the screen.
For achieving an anti-peeping effect for the displaying monitor of computers or mobile communication devices, an anti-peeping layer is added between the backlight module and the panel, whereby the angle of the visible range of the displaying monitor is narrowed down. For example, the visible range of certain displayers is narrowed down from 175 degrees to 45 degrees. However, the anti-peeping effect of the computers or mobile communication devices is not achievable without the anti-peeping layer.
Referring to
For resolving the issues above, a hanging type switchable anti-peeping device is disclosed. With the anti-peeping device removably and externally hung on the displaying screen, an anti-peeping effect is provided on the displaying screen of a computer or mobile device which has no anti-peeping function. The anti-peeping device, when hung up, maintains the brightness of the screen for facilitating an optimal displaying effect.
For achieving the aforementioned objectives, in accordance with one embodiment of the present invention, a hanging type switchable anti-peeping device which is removably and externally hung on a displaying screen comprises two conductive layers, a displaying medium layer, and a drive unit. The displaying medium layer is disposed between the two conductive layers. At least one conductive layer comprises a plurality of hollow portions arranged at intervals to form a plurality of division portions in a grille structure. When the displaying screen lightens, the transmittance of the hollow portion is higher than the transmittance of the division portion. The drive unit is electrically connected with the two conductive layers and switchable between an ON status and an OFF status. In the ON status, the drive unit provides a driving voltage between the two conductive layers, thereby driving the displaying medium layer to change the light permeability thereof.
With such configuration, when the displaying screen lightens, based on the fact that the hollow portions of the conductive layer have a higher transmittance than the division portions, by driving the displaying medium layer between the two conductive layers to change the light permeability thereof during the ON status of the drive unit, an anti-peeping effect is achieved. Also, by use of the hollow portions of the conductive layer, the light of the displaying screen effectively passes through the conductive layer, providing an optimal transmittance of the conductive layer. Therefore, while achieving the aforementioned anti-peeping effect, an optimal displaying brightness of the displaying screen is maintained, so as to prevent the brightness reduction of the screen due to the anti-peeping device, thereby assuring the anti-peeping effect and the preferable brightness of displaying.
The aforementioned and further advantages and features of the present invention will be understood by reference to the description of the preferred embodiment in conjunction with the accompanying drawings where the components are illustrated based on a proportion for explanation but not subject to the actual component proportion.
Referring to
The first conductive layer 10, in the embodiment, comprises a plurality of hollow portions 11 arranged at intervals. The hollow portions 11 form a plurality of division portions 12 therebetween, so that the division portions 12 and the hollow portions 11 of the first conductive layer 10 are alternately disposed to form a grille arrangement structure. When the displaying screen 200 lightens, the transmittance of the hollow portions 11 is higher than the transmittance of the division portions 12. The second conductive layer 20, in the embodiment, is an integral plate member without hollow portions 11. The second conductive layer 20 and the first conductive layers 10 in the embodiments are formed of glass material. In other embodiments, the second conductive layer 20 and the first conductive layers 10 are allowed to be a film. Also, the hollow portions 11 and the division portions 12 are alternately arranged at equal intervals.
The displaying medium layer 30 is disposed between the first conductive layer 10 and the second conductive layer 20. The displaying medium layer 30 is allowed to be, for example, liquid crystal (LC), polymer dispersed liquid crystal (PDLC), electrophoretic ink, or magnetic material. Therein, when a driving voltage is provided, the liquid crystal is capable of varying the direction of light beam, so as to vary the light permeability for achieving the anti-peeping effect.
The drive unit 40 is electrically connected with the first conductive layer 10 and the second conductive layer 20, thereby forming a power supply circuit therebetween. The drive unit 40 is switchable between an ON status and an OFF status. The ON status is defined as an electrified status that the drive unit 40 provides a driving voltage, and the OFF status is defined as a disconnection status that the drive unit 40 does not provide the driving voltage. When the drive unit 40 is in the ON status, the drive unit 40 provides the driving voltage between the first conductive layer 10 and the second conductive layer 20, such that the driving voltage drives the displaying medium layer 30 to change the light permeability thereof. The drive unit 40, in the embodiment, comprises an USB plug 41, and the anti-peeping device 100 in the embodiment comprises a main body 50 wrapping the first conductive layer 10, the second conductive layer 20, and the displaying medium layer 30, wherein the main body 50 comprises an USB socket 51 electrically connected with the first conductive layer 10 and the second conductive layer 20. When the USB plug 41 is inserted in the USB socket 51, the drive unit 40 is electrically connected with the first conductive layer 10 and the second conductive layer 20.
Particularly, the first conductive layer 10 is applied in various embodiments. Referring to
The first conductive layer 10 includes various forms as mentioned in the first, second, and third embodiments. Further, when the first conductive layer 10 is provided in any form of the three embodiments, the second conductive layer 20 is allowed to be embodied as a plate member without the hollow portions 11, 11A, or 11B. The second conductive layer 20 is also allowed to be optionally provided in any form of the three embodiments as the first conductive layer 10. Upon the second conductive layer 20 being embodied in any form of the three embodiments, the first conductive layer 10 is allowed to be embodied as a plate member without the hollow portions 11, 11A, or 11B. In other words, when the first conductive layer 10 is provided in any form of the three embodiments, the second conductive layer 20 is also allowed to be embodied in the form of the first, second, or third embodiments of the first conductive layer 10 or as a plate member without the hollow portions 11, 11A, or 11B; when the second conductive layer 20 is provided in any form of the three embodiments, the first conductive layer 10 is also allowed to be embodied in the form of the first, second, or third embodiment, or as a plate member without the hollow portions 11, 11A, or 11B. During the driving voltage being provided as aforementioned, the first conductive layer 10 and the second conductive layer 20 provide the anti-peeping effect upon the visions from different viewpoints in accordance with the first, the second and the third embodiment, so as to fulfill the actual usage demand.
With the foregoing configuration, when the displaying screen 200 lightens in the displaying status, the drive unit 40 is able to be switched to the ON status, so as to drive the displaying medium layer 30 between the first conductive layer 10 and the second conductive layer 20 to change the light permeability of the displaying medium layer 30. For example, when the driving voltage is provided, the liquid crystal changes the direction of light beam therein to change the light permeability thereof. Based on the fact that the transmittance of the hollow portions 11, 11A, and 11B of the first conductive layer 10 (or the second conductive layer 20 in other embodiments) is higher than the transmittance of the division portions 12, the anti-peeping effect is provided upon the visions from the viewpoints on the left, right, upper, or lower side. Besides, the light beam of the displaying screen 200 is allowed to effectively pass through the hollow portions 11, 11A, and 11B of the first conductive layer 10. The present invention facilitates an optimal transmittance of the conductive layers (including the first conductive layer 10 and the second conductive layer 20), so as to maintain the displaying brightness of the displaying screen 200 while providing the anti-peeping effect simultaneously, preventing the brightness of the displaying screen 200 from decrease due to the anti-peeping device 100, thereby achieving both the anti-peeping and optimal brightness maintaining functions.
Furthermore, regarding the anti-peeping device 100 in the aforementioned embodiments, the twofold functions are provided with only one set of stacked layers which has the displaying medium layer 30 disposed between the two conductively layers 10, 20. In other embodiments, the layer structure is allowed to be carried out by at least two sets of stacked layers, which provides a superior anti-peeping effect compared with the aforementioned embodiments having only one set of stacked layers.
Although particular embodiments of the invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.