CN220872827U - Touch peep-proof display panel and display device - Google Patents
Touch peep-proof display panel and display device Download PDFInfo
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- CN220872827U CN220872827U CN202322651927.9U CN202322651927U CN220872827U CN 220872827 U CN220872827 U CN 220872827U CN 202322651927 U CN202322651927 U CN 202322651927U CN 220872827 U CN220872827 U CN 220872827U
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- 239000000758 substrate Substances 0.000 claims abstract description 40
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 39
- 230000001360 synchronised effect Effects 0.000 claims abstract description 18
- 230000000007 visual effect Effects 0.000 claims abstract description 6
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 8
- 230000003321 amplification Effects 0.000 claims description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 7
- 244000144985 peep Species 0.000 abstract description 7
- 230000002265 prevention Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 208000008918 voyeurism Diseases 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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Abstract
The utility model provides a touch peep-proof display panel and a display device, wherein the touch peep-proof display panel comprises a display liquid crystal box and a dimming liquid crystal box, the dimming liquid crystal box comprises a first substrate, a second substrate arranged opposite to the first substrate and a second liquid crystal layer arranged between the first substrate and the second substrate, a first electrode layer is arranged on one side, facing the second liquid crystal layer, of the first substrate, and a plurality of first electrodes for displaying wide and narrow visual angles and sensing touch are arranged on the first electrode layer; a second electrode layer is arranged on one side of the second substrate facing the second liquid crystal layer, and a plurality of second electrodes for touch sensing are arranged on the second electrode layer; the dimming liquid crystal box further comprises a peep-proof and touch time-sharing driving circuit electrically connected with the first electrode layer, and the peep-proof and touch time-sharing driving circuit receives the synchronous signal and triggers the time-sharing output of the touch signal and the peep-proof signal. The touch control and peep prevention are integrated on one layer of panel for time-sharing driving, so that the cost is saved, and the overall thickness is reduced.
Description
Technical Field
The utility model relates to the field of display, in particular to a touch peep-proof display panel and a display device.
Background
With the continuous progress of the liquid crystal display technology, users want to effectively protect business confidentiality and personal privacy while using the display device, so as to avoid business loss or embarrassment caused by screen information leakage. Therefore, in addition to the wide viewing angle requirement, the display device is required to have a function of switching between wide and narrow viewing angles in many occasions. In the prior art, the display device can be provided with a dimming box and a display panel for use in cooperation, the display panel is used for normal picture display, and the dimming box is used for realizing switching between a wide-view display mode and a narrow-view display mode.
However, the touch peep-proof display panel in the prior art often adopts two structural designs. In the first scheme, display panel, peep-proof panel and touch panel, three-layer panel stack layer upon layer, but this scheme cost is higher and module thickness is great. In the second scheme, the display and the touch are made on one layer of panel, and then one layer of peep-proof panel is attached, but the touch effect of the scheme is poor.
Disclosure of utility model
In view of the above, the present utility model provides a touch-control privacy display panel and a display device, which can integrate touch control and privacy on a panel layer for time-sharing driving, thereby saving cost and reducing overall thickness.
The embodiment of the utility model provides a touch peep-proof display panel, which comprises a display liquid crystal box and a dimming liquid crystal box, wherein the display liquid crystal box comprises an array substrate, a color film substrate arranged opposite to the array substrate and a first liquid crystal layer positioned between the array substrate and the color film substrate; the dimming liquid crystal box comprises a first substrate, a second substrate and a second liquid crystal layer, wherein the second substrate is arranged opposite to the first substrate, the second liquid crystal layer is positioned between the first substrate and the second substrate, a first electrode layer is arranged on one side, facing the second liquid crystal layer, of the first substrate, and a plurality of first electrodes for displaying wide and narrow visual angles and sensing touch are arranged on the first electrode layer; a second electrode layer is arranged on one side of the second substrate facing the second liquid crystal layer, and a plurality of second electrodes for touch sensing are arranged on the second electrode layer; the dimming liquid crystal box further comprises a peep-proof and touch time-sharing driving circuit electrically connected with the first electrode layer, and the peep-proof and touch time-sharing driving circuit receives a synchronous signal and triggers time-sharing output of a touch signal and a peep-proof signal.
Specifically, the peep-proof and touch time-sharing driving circuit comprises a touch signal generating module, a peep-proof signal generating module and a selection switching module; the selection switching module comprises a first input end, a second input end, a third input end and an output end; the first input end of the selection switching module is connected with the touch signal generating module, the second input end of the selection switching module is connected with the peep-proof signal generating module, the third input end of the selection switching module receives the synchronous signal, and the output end of the selection switching module is electrically connected with the first electrode layer.
Specifically, the peep-proof and touch time-sharing driving circuit is connected with a synchronous signal generator, and the synchronous signal generator provides the synchronous signal.
Specifically, the touch signal generation module comprises a touch circuit and a touch signal control unit, the touch circuit is connected with the touch signal control unit, and the touch signal control unit is configured to trigger and output the touch signal according to the low level of the synchronous signal.
Specifically, the touch signal control unit is provided with a trigger signal output end, and the trigger signal output end of the touch signal control unit is connected with the third input end of the selection switching module and provides the synchronous signal.
Specifically, the touch signal control unit is provided with a trigger signal output end, and the trigger signal output end of the touch signal control unit is respectively connected with the third input end of the selection switching module and the peep-proof signal generation module and provides the synchronous signal.
Specifically, the peep-proof signal generation module comprises a voltage amplification unit; the voltage amplifying unit comprises a positive input end, an opposite phase input end and an output end, wherein the positive input end of the voltage amplifying unit is grounded, the opposite phase input end of the voltage amplifying unit receives direct current reference voltage through a first resistor and also receives alternating current reference voltage through a second resistor, and the output end of the voltage amplifying unit is connected with the second input end of the selection switching module and is also connected with the opposite phase input end of the voltage amplifying unit through a third resistor.
Specifically, the peep-proof signal generating module further comprises a time-sharing control unit and a reference voltage generating unit, wherein the time-sharing control unit receives the synchronous signal and provides alternating reference voltage data, and the reference voltage generating unit is connected with the time-sharing control unit and outputs the alternating reference voltage.
Specifically, the selection switching module is a single-pole double-throw switch.
The embodiment of the utility model also provides a display device which comprises the touch peep-proof display panel.
According to the touch peep-proof display panel and the display device provided by the embodiment of the utility model, the first electrode layer in the dimming liquid crystal box is provided with the plurality of first electrodes for wide-narrow visual angle display and touch sensing, the dimming liquid crystal box further comprises the peep-proof and touch time-sharing driving circuit electrically connected with the first electrode layer, the peep-proof and touch time-sharing driving circuit receives the synchronous signals, the switching module can be selected to switch and output the touch signals and the peep-proof signals according to the synchronous signals, the touch control and peep-proof functions of the touch peep-proof display panel are realized, and then the touch control and peep-proof are integrated on one layer of panel to perform time-sharing driving, so that the cost is saved, and the overall thickness is reduced.
The foregoing and other objects, features and advantages of the utility model will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of a touch-control privacy display panel according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a structure of a peep-proof and touch time-sharing driving circuit in a touch-control peep-proof display panel according to an embodiment of the utility model;
FIG. 3 is a schematic diagram of a specific structure of a peep-proof and touch time-sharing driving circuit in a touch-control peep-proof display panel according to an embodiment of the utility model;
Fig. 4 is a schematic signal timing diagram of a peep-proof and touch time-sharing driving circuit in a touch-control peep-proof display panel according to an embodiment of the utility model.
Detailed Description
In order to further describe the technical means and effects adopted by the utility model to achieve the intended purpose, the following detailed description refers to the specific implementation, method, steps, structure, characteristics and effects of the touch-control privacy display panel according to the present utility model with reference to the accompanying drawings and preferred embodiments.
The foregoing and other features, aspects, and advantages of the present utility model will become more apparent from the following detailed description of the preferred embodiments, which proceeds with reference to the accompanying drawings. While the utility model may be susceptible to further details of embodiments and examples of means and effects for achieving the desired purpose, the drawings are provided for the purpose of reference and illustration only and are not intended to be limiting.
Fig. 1 is a schematic structural diagram of a touch-control privacy display panel according to an embodiment of the utility model. As shown in fig. 1, the present embodiment provides a touch peep-proof display panel. The touch peep-proof display panel displays a liquid crystal box and a dimming liquid crystal box, wherein the dimming liquid crystal box comprises a first substrate 110, a second substrate 150 arranged opposite to the first substrate 110, and a second liquid crystal layer 130 positioned between the first substrate 110 and the second substrate 150, wherein one side of the first substrate 110 facing the second liquid crystal layer 130 is provided with a first electrode layer 120, and the first electrode layer 120 is provided with a plurality of first electrodes for displaying wide and narrow visual angles and touch sensing; a second electrode layer 140 is disposed on a side of the second substrate 150 facing the second liquid crystal layer 130, and the second electrode layer 140 is provided with a plurality of second electrodes for touch sensing; the dimming liquid crystal box further comprises a peep-proof and touch-control time-sharing driving circuit 200 electrically connected with the first electrode layer 120, wherein the peep-proof and touch-control time-sharing driving circuit 200 receives a synchronous signal sync and triggers time-sharing output of a touch signal and a peep-proof signal.
Fig. 2 is a schematic structural diagram of a peep-proof and touch time-sharing driving circuit 200 in a touch-control peep-proof display panel according to an embodiment of the utility model.
In an embodiment of the present utility model, as shown in fig. 2, the peep-proof and touch time-sharing driving circuit 200 includes a touch signal generating module 210, a peep-proof signal generating module 220, and a selection switching module 230; the selection switch module 230 includes a first input terminal, a second input terminal, a third input terminal, and an output terminal; a first input end of the selection switching module 230 is connected to the touch signal generating module 210, a second input end of the selection switching module 230 is connected to the peep-proof signal generating module 220, a third input end of the selection switching module 230 receives the synchronization signal sync, and an output end of the selection switching module 230 is electrically connected to the first electrode layer 120.
Specifically, referring to fig. 1 and 2, in the touch-control privacy display panel of the present embodiment, the privacy and touch-control time-sharing driving circuit 200 is used for providing the touch-control signal and the privacy signal in a time-sharing manner. The selection switch module 230 in the anti-peeping and touch time-sharing driving circuit 200 receives the synchronization signal sync through a third input terminal thereof. The selection switching module 230 may trigger the selection to turn on the first input terminal and the output terminal according to a first active level, such as a low level, of the synchronization signal sync, and the touch signal generating module 210 may output a touch signal through the selection switching module 230, that is, the output signal of the selection switching module 230 is the same as the ac signal output by the peep-proof signal generating module 220. The selection switching module 230 may trigger to conduct the second input terminal and the output terminal according to a second active level, such as a high level, of the synchronization signal sync, so that the peep-proof signal generating module 220 may select the output peep-proof signal of the switching module 230, that is, the direct current voltage output by the switching module 230 is overlapped with the signal of the touch signal generating module 210. Therefore, the first electrode layer 120 in the touch-control peep-proof display panel can be electrically connected with the selection switching module 230 in the peep-proof and touch-control time-sharing driving circuit 200, receives the touch-control signal and the peep-proof signal which are output in a time-sharing manner, and is respectively used for the touch-control sensing mode and the peep-proof display mode, so that the touch control and the peep-proof are integrated on one layer of panel to be driven in a time-sharing manner, the cost is saved, and the overall thickness is reduced.
In an embodiment of the present utility model, the peep-proof and touch time-sharing driving circuit 200 may be connected to a synchronization signal generator, where the synchronization signal generator provides a synchronization signal sync.
Fig. 3 is a schematic diagram of a specific structure of a peep-proof and touch time-sharing driving circuit 200 in a touch-control peep-proof display panel according to an embodiment of the utility model.
In an embodiment of the present utility model, as shown in fig. 3, the touch signal generating module 210 includes a touch circuit 211 and a touch signal control unit 212, where the touch circuit 211 is connected to the touch signal control unit 212, and the touch signal control unit 212 is configured to trigger and output the touch signal c according to the low level of the synchronization signal sync. Optionally, the touch circuit 211 and the touch signal control unit 212 are connected through an SPI interface. The touch circuit 211 may output a touch signal c to the first end of the selection switch module 230 through the touch signal control unit 212, and may be electrically connected to the second electrode layer 140 to receive an inductive feedback signal.
In one embodiment of the present utility model, the touch signal control unit 212 is provided with a trigger signal output end, the trigger signal output end of the touch signal control unit 212 is connected to the third input end of the selection switch module 230 and provides the synchronization signal sync, so that the touch signal generating module 210 outputs the touch signal c, and the selection switch module 230 switches on the first input end and the output end and triggers with reference to the high and low levels of the synchronization signal sync, so that touch abnormality and peeping flicker caused by interference between signals can be avoided.
In one embodiment of the present utility model, as shown in fig. 3, the touch signal control unit 212 is provided with a trigger signal output end, and the trigger signal output end of the touch signal control unit 212 is respectively connected to the third input end of the selection switch module 230 and the peep-proof signal generating module 220, and provides a synchronization signal sync. Thus, the touch signal generating module 210 outputs the touch signal c, the peep preventing signal generating module 220 outputs the peep preventing signal b, and the selection switching module 230 switches on the first input end and the output end or switches on the second input end and the output end, which are triggered by referring to the high and low levels of the synchronization signal sync, so that touch abnormality and peep preventing flicker caused by interference between signals can be avoided.
In an embodiment of the present utility model, as shown in fig. 3, the peep-proof signal generating module 220 includes a voltage amplifying unit 221; the voltage amplifying unit 221 includes a non-inverting input terminal, an inverting input terminal, and an output terminal, where the non-inverting input terminal of the voltage amplifying unit 221 is grounded, the inverting input terminal of the voltage amplifying unit 221 receives the dc reference voltage V1 through the first resistor 222, and also receives the ac reference voltage V2 through the second resistor 223, and the output terminal of the voltage amplifying unit 221 is connected to the second input terminal of the selection switching module 230, and also connected to the inverting input terminal of the voltage amplifying unit 221 through the third resistor 224. The dc reference voltage V1 may be a negative voltage. Accordingly, the ac reference voltage V2 may be bias-amplified into the peep-preventing signal b by the dc reference voltage V1 and the voltage amplifying unit 221, so that the voltage amplifying unit 221 may provide the peep-preventing signal b required for the peep-preventing period.
In one embodiment of the present utility model, as shown in fig. 3, the peep-proof signal generating module 220 further includes a time-sharing control unit 225 and a reference voltage generating unit 226, where the time-sharing control unit 225 receives the synchronization signal sync and provides ac reference voltage data, and the reference voltage generating unit 226 is connected to the time-sharing control unit 225 and outputs an ac reference voltage V2 according to the ac reference voltage data. In one embodiment, when the synchronization signal sync is at the low level, the time-sharing control unit 225 controls the ac reference voltage V2 output by the reference voltage generating unit 226 to be a dc voltage of 0V; when the synchronization signal sync is at a high level, the time-sharing control unit 225 controls the ac reference voltage V2 output from the reference voltage generating unit 226 to be an ac voltage, for example, a rectangular square wave voltage. Thus, the time-sharing control unit 225 controls the reference voltage generating unit 226 to provide the ac reference voltage V2 as the ac voltage only in the peep-preventing period when the synchronization signal sync is at the high level, and the dc reference voltage V1 and the voltage amplifying unit 221 can bias and amplify the ac reference voltage V2 into the peep-preventing signal b for deflecting the liquid crystal molecules to prevent peeping, and accordingly, the time-sharing control unit 225 controls the reference voltage generating unit 226 not to output the ac signal in the touch-control period when the synchronization signal sync is at the low level, so that the interference of touch sensing can be avoided.
In an embodiment of the utility model, the reference voltage generating unit 226 is provided with a power supply input for receiving the power supply voltage V3. In one embodiment, the supply voltage V3 is a positive voltage. In one embodiment, the waveform of the ac reference voltage V2 output by the reference voltage generating unit 226 is near the X-axis.
In the embodiment of the present utility model, the selection switching module 230 may be, but not limited to, a single pole double throw switch, a corresponding element with a switching function, or the like.
In an embodiment of the present utility model, the frequency of the touch signal c output by the selection switch module 230 may be greater than 60Hz, and the frequency of the peep-proof signal b output may be greater than 120Hz. Because the selection switching module 230 performs switching output according to the synchronous signal sync, switching between touch control and peep prevention is realized, and therefore, peep prevention flickering and poor touch control effects cannot be caused due to switching between touch control and peep prevention.
Fig. 4 is a schematic signal timing diagram of a peep-proof and touch time-sharing driving circuit 200 in a touch-sensitive peep-proof display panel according to an embodiment of the utility model. Referring to fig. 3 and fig. 4, in the peep-proof and touch-control time-sharing driving circuit 200 of the present embodiment, when the synchronization signal sync is at a high level, the output signal d of the switching module 230 and the peep-proof signal b output by the peep-proof signal generating module 220 are selected to be the same ac signal; when the synchronization signal sync is at a low level, the output signal d of the switching module 230 is selected to be the signal superposition of the direct current voltage output by the peep-proof signal generating module 220 and the touch signal c of the touch signal generating module 210. Therefore, the touch peep-proof display panel of the embodiment realizes the touch control and peep-proof functions.
Based on the same inventive concept, the embodiment of the utility model also provides a display device, which comprises the touch peep-proof display panel of any embodiment. The implementation of the display device can be referred to the embodiment of the touch peep-proof display panel, and the repetition is not repeated.
According to the touch peep-proof display panel and the display device provided by the embodiment of the utility model, the first electrode layer 120 in the dimming liquid crystal box is provided with a plurality of first electrodes for wide-narrow visual angle display and touch sensing, the dimming liquid crystal box further comprises the peep-proof and touch time-sharing driving circuit 200 electrically connected with the first electrode layer 120, the peep-proof and touch time-sharing driving circuit 200 receives the synchronous signal sync, and the switching module 230 can be used for switching and outputting the touch signal and the peep-proof signal according to the synchronous signal sync, so that the touch control and peep-proof functions of the touch peep-proof display panel are realized, and then the touch control and peep-proof are integrated on one layer of panel to perform time-sharing driving, so that the cost is saved, and the whole thickness is reduced.
The present utility model is not limited to the preferred embodiments, but is capable of modification and variation in detail, and is intended to cover modifications, equivalents and variations of the above embodiments in accordance with the principles of the present utility model, without departing from the scope of the utility model.
Claims (10)
1. The touch peep-proof display panel is characterized by comprising a display liquid crystal box, a touch peep-proof display panel and a touch peep-proof display panel, wherein the display liquid crystal box comprises an array substrate, a color film substrate and a first liquid crystal layer, the color film substrate is arranged opposite to the array substrate, and the first liquid crystal layer is arranged between the array substrate and the color film substrate; further comprises:
The dimming liquid crystal box comprises a first substrate (110), a second substrate (150) arranged opposite to the first substrate (110), and a second liquid crystal layer (130) arranged between the first substrate (110) and the second substrate (150), wherein a first electrode layer (120) is arranged on one side, facing the second liquid crystal layer (130), of the first substrate (110), and a plurality of first electrodes used for wide-narrow visual angle display and touch sensing are arranged on the first electrode layer (120); a second electrode layer (140) is arranged on one side, facing the second liquid crystal layer (130), of the second substrate (150), and a plurality of second electrodes for touch sensing are arranged on the second electrode layer (140); the dimming liquid crystal box further comprises a peep-proof and touch time-sharing driving circuit (200) electrically connected with the first electrode layer (120), and the peep-proof and touch time-sharing driving circuit (200) receives a synchronous signal and triggers time-sharing output of a touch signal and a peep-proof signal.
2. The touch-control privacy display panel according to claim 1, wherein the privacy and touch-control time-sharing driving circuit (200) comprises a touch signal generation module (210), a privacy signal generation module (220) and a selection switching module (230); the selection switching module (230) comprises a first input end, a second input end, a third input end and an output end; the first input end of the selection switching module (230) is connected with the touch signal generating module (210), the second input end of the selection switching module (230) is connected with the peep-proof signal generating module (220), the third input end of the selection switching module (230) receives the synchronous signal, and the output end of the selection switching module (230) is electrically connected with the first electrode layer (120).
3. The touch-sensitive privacy display panel of claim 1, wherein the privacy and touch-sensitive time-sharing drive circuit (200) is connected to a synchronization signal generator that provides the synchronization signal.
4. The touch-sensitive display panel according to claim 2, wherein the touch signal generation module (210) comprises a touch circuit (211) and a touch signal control unit (212), the touch circuit (211) is connected to the touch signal control unit (212), and the touch signal control unit (212) is configured to trigger and output the touch signal according to a low level of the synchronization signal.
5. The touch-sensitive privacy display panel according to claim 4, wherein the touch signal control unit (212) is provided with a trigger signal output end, and the trigger signal output end of the touch signal control unit (212) is connected to the third input end of the selection switch module (230) and provides the synchronization signal.
6. The touch-sensitive privacy display panel according to claim 4, wherein the touch signal control unit (212) is provided with a trigger signal output end, and the trigger signal output end of the touch signal control unit (212) is respectively connected with the third input end of the selection switching module (230) and the privacy signal generation module (220) and provides the synchronization signal.
7. The touch-sensitive privacy display panel of claim 2, wherein the privacy signal generation module (220) comprises a voltage amplification unit (221); the voltage amplification unit (221) comprises a normal phase input end, an inverted phase input end and an output end, the normal phase input end of the voltage amplification unit (221) is grounded, the inverted phase input end of the voltage amplification unit (221) receives a direct current reference voltage (V1) through a first resistor (222), and also receives an alternating current reference voltage (V2) through a second resistor (223), and the output end of the voltage amplification unit (221) is connected with the second input end of the selection switching module (230) and is also connected with the inverted phase input end of the voltage amplification unit (221) through a third resistor (224).
8. The touch-sensitive privacy display panel according to claim 7, wherein the privacy signal generating module (220) further comprises a time-sharing control unit (225) and a reference voltage generating unit (226), the time-sharing control unit (225) receives the synchronization signal and provides ac reference voltage data, and the reference voltage generating unit (226) is connected to the time-sharing control unit (225) and outputs the ac reference voltage (V2).
9. The touch-sensitive privacy display panel of claim 2, wherein the selection switch module (230) is a single pole double throw switch.
10. A display device comprising the touch-sensitive privacy display panel of any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322651927.9U CN220872827U (en) | 2023-09-28 | 2023-09-28 | Touch peep-proof display panel and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322651927.9U CN220872827U (en) | 2023-09-28 | 2023-09-28 | Touch peep-proof display panel and display device |
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| Publication Number | Publication Date |
|---|---|
| CN220872827U true CN220872827U (en) | 2024-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322651927.9U Active CN220872827U (en) | 2023-09-28 | 2023-09-28 | Touch peep-proof display panel and display device |
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| Country | Link |
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| CN (1) | CN220872827U (en) |
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2023
- 2023-09-28 CN CN202322651927.9U patent/CN220872827U/en active Active
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