TWI417772B - Screen controlled by light signal - Google Patents

Description

Screen with light signal control

The invention relates to a display screen, in particular to a display screen which can be controlled by an optical signal.

With the advancement of technology, the input methods of electronic products have become various. Currently, the input methods commonly used are keyboard, mouse, touch screen input, etc., especially the touch screen input, the user simply touches the screen on the screen with his finger. The display or text can realize the operation of the host, so that the human-computer interaction is more straightforward, and people use the touch screen instead of the mouse or the keyboard. When working, the user first touches the touch screen with a finger or other object, and then the system locates the selection information input according to the touch icon or the function table position. The touch screen is composed of a touch detecting component and a touch screen controller; the touch detecting component is configured to detect a touch position of the user and transmit the touch information to the touch screen controller; and the main function of the touch screen controller is to receive touch information from the touch detecting device. It is converted into a contact coordinate and sent to the processor, which can also receive commands from the processor and execute them.

According to the working principle of the touch screen and the medium for transmitting information, the touch screen can be divided into a resistive type, a capacitive sensing type, an infrared type, and a surface acoustic wave type. Please refer to FIG. 1 , which is a schematic diagram of a cross section of a resistive touch screen 30. The resistive touch screen 30 includes a display screen 31 , a resistive film screen 32 and a controller matched with the surface of the display screen 31 . 37, the resistive film screen 32 is a multi-layer composite film, which is made of a glass or hard plastic plate as the base layer 321 , and the surface of the base layer 321 is coated with a transparent oxidized metal (transparent conductive resistor) conductive layer 322, and the conductive layer 322 is covered thereon. The outer surface of the protective layer 323 is also coated with a conductive layer 324, and the two conductive layers 322, 324 are respectively connected to the controller 37, between the two conductive layers 322, 324. There are a plurality of fine (less than 1/1000 inch) transparent isolation dots 326 that insulate the two conductive layers 322, 324. When the finger touches the screen, the two conductive layers 322, 324 have contact at the touch point position, and the resistance of the contact between the two conductive layers 322, 324 changes, and a signal is generated and sent to the touch screen controller 37, and the controller 37 detects This contact was measured and the position of the contact point was calculated. However, for the touch screen, the user needs to be close to the screen in order to touch, and the screen is easily scratched due to long-time touch, which makes the screen blurred and affects the display of the image.

In view of this, it is necessary to provide a screen that can be manipulated without direct contact.

A screen controlled by an optical signal, comprising a display screen and a resistive film screen matched with the surface of the display screen, the resistive film screen is provided with two layers of electrically insulating layers separated from each other, and the two conductive layers are connected A plurality of photoresistors that change their resistance under the illumination of a specific light.

Compared with the prior art, the screen provided by the invention for controlling by using an optical signal is controlled by an optical signal, which can effectively protect the screen from being scratched.

20‧‧‧ screen

21‧‧‧ display

22‧‧‧Resistive film screen

221‧‧‧ grassroots

222, 224‧‧‧ conductive layer

223‧‧‧protective layer

226‧‧‧Isolation point

227‧‧‧Photoresistors

25‧‧‧Light signal transmitter

27‧‧‧ Controller

30‧‧‧Resistive touch screen

31‧‧‧ display

32‧‧‧Resistive film screen

321‧‧‧ grassroots

322, 324‧‧‧ conductive layer

323‧‧‧protective layer

326‧‧‧Isolation point

37‧‧‧ Controller

1 is a schematic view of a cross section of a conventional resistive touch screen.

2 is a schematic view showing a cross section of a screen controlled by an optical signal according to the present invention.

FIG. 3 is a schematic diagram showing the distribution of photoresistors in a screen controlled by an optical signal according to the present invention.

FIG. 4 is a schematic diagram of a screen for controlling an optical signal according to the present invention.

Please refer to FIG. 2 and FIG. 3 , which are schematic diagrams of a screen 20 for controlling optical signals according to the present invention. The screen 20 includes a display screen 21 , a resistive film screen 22 matched with the surface of the display screen 21 , and a controller 27 . The film screen 22 includes a base layer 221 of glass or hard plastic material. The surface of the base layer 221 is coated with a transparent oxidized metal (transparent conductive resistor) conductive layer 222. The conductive layer 222 is covered with a transparent protective layer 223 and a protective layer. The inner surface of 223 is also coated with a conductive layer 224. The two conductive layers 222, 224 are respectively connected to the controller 27. There are many small (less than 1/1000 inch) transparent isolation points 226 between the two conductive layers 222, 224. The layer conductive layers 222, 224 are separated from each other. A plurality of photoresistors 227 are connected between the two conductive layers 222 and 224. The photoresistors 227 have a large resistance under normal conditions (for example, under sunlight and illumination) to isolate the two conductive layers 222 and 224. Under the illumination of a specific light (for example, infrared light, laser, etc.), the resistance of the photoresistor 227 at the light irradiation is rapidly lowered, and a signal is generated and sent to the controller 27, which detects the contact and calculates the contact point. The location.

Please refer to FIG. 4 , which is a schematic diagram of controlling the screen 20 by using an optical signal. An optical signal transmitter 25 can emit a specific light for triggering the photoresistor 227, and the user aligns the light emitted by the optical signal transmitter 25 with the screen. Wherein, the cursor on the screen appears there, for example, in FIG. 4, the light emitted by the light signal emitter 25 is illuminated on the screen. At the "Start" menu above, the controller 27 calculates the position of the light illumination and controls the screen 20 to display the cursor at the "Start" menu.

The two conductive layers 222 and 224 generate corresponding resistance change modes corresponding to a plurality of light change modes of the specific light, and the resistance change modes respectively correspond to different control commands, thereby implementing various icons on the screen or function tables. Control of the way. For example, the light emitted by the optical signal transmitter 25 in FIG. 4 flashes once, so that the resistance of the photoresistor 227 therein changes according to a corresponding mode, and the controller 27 detects the change of the resistance, and correspondingly generates Click the command to click the "Start" menu; if you need to input the double-click command, the light emitted by the light signal transmitter 25 can be flashed twice, so that the resistance of the photoresistor 227 here is corresponding to a certain one. When the mode changes, the controller 27 detects the change in resistance and generates a double-click command.

The screen provided by the invention for controlling by using an optical signal is controlled by an optical signal, which can effectively protect the screen from being scratched.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

20‧‧‧ screen

21‧‧‧ display

22‧‧‧Resistive film screen

221‧‧‧ grassroots

222, 224‧‧‧ conductive layer

223‧‧‧protective layer

226‧‧‧Isolation point

227‧‧‧Photoresistors

27‧‧‧ Controller

Claims (7)

A screen controlled by an optical signal, comprising a display screen and a resistive film screen matched with the surface of the display screen, the resistive film screen is provided with two layers of electrically insulating layers separated from each other, and the two conductive layers are connected a plurality of photoresistors, wherein the photoresists can change their resistance under the illumination of a specific light, and the two conductive layers correspondingly generate a plurality of resistance change modes corresponding to a plurality of light change modes of the specific light, and the resistance change modes respectively correspond to different Control instructions. The screen of claim 1, wherein the resistive film screen comprises a base layer, the base layer is covered with a protective layer, and the opposite side of the base layer and the protective layer are coated with the two conductive layers, and the two conductive layers are There are a number of small transparent isolation points to separate the two conductive layers from each other. The screen of claim 1, wherein: the photoresistor has a resistance drop under illumination of a particular light. The screen of claim 1, wherein: a controller is connected between the two conductive layers, and the controller senses a change in resistance between the two conductive layers to calculate a position where the specific light is irradiated. The screen of claim 4, wherein: the screen exhibits a cursor at the particular light illumination. The screen of claim 1, wherein: the particular light flashes once to generate a click command. The screen of claim 6, wherein: the particular ray flashes twice to generate a double click command.