CN102073421A - Photoinduction touch unit and touch display panel - Google Patents
Photoinduction touch unit and touch display panel Download PDFInfo
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- CN102073421A CN102073421A CN2010106232771A CN201010623277A CN102073421A CN 102073421 A CN102073421 A CN 102073421A CN 2010106232771 A CN2010106232771 A CN 2010106232771A CN 201010623277 A CN201010623277 A CN 201010623277A CN 102073421 A CN102073421 A CN 102073421A
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Abstract
The invention provides a touch display panel and a light-sensing touch unit thereof. The light-sensing touch unit comprises a first light-sensing touch element positioned in a first element area and a second light-sensing touch element positioned in a second element area. The first light-sensing touch element and the second light-sensing touch element are at least partially exposed to ambient light, and touch input judgment of the light-sensing touch unit is based on an absolute value of a difference value between a first light-sensing signal of the first light-sensing touch element and a second light-sensing signal of the second light-sensing touch element.
Description
Technical field
The present invention relates to a kind of photo induction touch-control unit and touch-control display panel, refer to a kind of touch-control display panel that comprises the photo induction touch-control unit of the one first photo induction touch-control element and the second photo induction touch-control element and be provided with this photo induction touch-control unit especially.The input of the touch-control of photo induction touch-control unit judges that absolute value with the difference of the second photoinduction signal of the first photoinduction signal of the first photo induction touch-control element and the second photo induction touch-control element is as foundation.
Background technology
In all types of consumption electronic products now, portable type electronic products such as panel computer, PDA(Personal Digital Assistant), mobile phone (mobile phone), satellite navigation system (GPS) and audio and video player use for example multi-form contact panels (touch panel) such as resistance-type, condenser type and photoinduction formula widely, as the communication interface of people's machine data, save the volume of electronic product whereby.
Please refer to Figure 1A and Figure 1B.Figure 1A and Figure 1B have illustrated the synoptic diagram of photoinduction element under regular event of known photoinduction formula contact panel.Shown in the left side of the left side of Figure 1A and Figure 1B, when not carrying out the touch-control input, photoinduction element 10 can not be subjected to covering of input media (for example finger), therefore can produce one first photoinduction signal V1 because of the irradiation that is subjected to surround lighting L.Shown in the right-hand part of the right-hand part of Figure 1A and Figure 1B, when carrying out the touch-control input, photoinduction element 10 can be subjected to covering of input media 12, therefore can be subjected to the irradiation of more a spot of surround lighting L and produces one second photoinduction signal V2.Because the power of the photoinduction signal of photoinduction element 10 is proportional to the irradiation amount, therefore the first photoinduction signal V1 can be greater than the second photoinduction signal V2.Known method judge whether the touch-control input time utilize identical photoinduction element 10 in the difference DELTA V of the first photoinduction signal V1 that different time points produced and the second photoinduction signal V2 as foundation, that is to say, as the difference DELTA V of the first photoinduction signal V1 and the second photoinduction signal V2 during, promptly judge to have the touch-control input signal greater than a predetermined value; Otherwise,, then judge do not have the touch-control input signal as the difference DELTA V of the first photoinduction signal V1 and the second photoinduction signal V2 during less than predetermined value.
Yet, when known method changes at the environment light intensity, be easy to produce erroneous judgement.Please refer to Fig. 2 A and Fig. 2 B.Fig. 2 A and Fig. 2 B have illustrated the synoptic diagram of photoinduction element under abnormal operation of known photoinduction formula contact panel.Shown in the left side of the left side of Fig. 2 A and Fig. 2 B, when the intensity of surround lighting L is big, when not carrying out the touch-control input, photoinduction element 10 can not be subjected to covering of input media (for example finger), therefore can produce one first photoinduction signal V1 because of the irradiation that is subjected to surround lighting L, and since this moment surround lighting L intensity bigger, therefore the first photoinduction signal V1 of this moment can be greater than the intensity of the surround lighting L first photoinduction signal V1 hour.Shown in the right-hand part of the right-hand part of Fig. 2 A and Fig. 2 B, equally when not carrying out the touch-control input, though input media 12 does not touch the surface of photoinduction element 10, but still may partly cover surround lighting L, photoinduction element 10 still can be sensed the surround lighting L of part and produce one second photoinduction signal V2 this moment.Under this situation, although input media 12 does not carry out the touch-control input, but because photoinduction element 10 may be greater than predetermined value at the difference DELTA V of the first photoinduction signal V1 that different time points produced and the second photoinduction signal V2, therefore known method can judge to have the touch-control input signal, and produces the erroneous judgement situation.
Therefore, how to avoid the environment light intensity to change and cause erroneous judgement, and then promote the precision of touch-control input, become key subjects in the photo induction touch-control technology for the interference of touch-control input.
Summary of the invention
One of purpose of the present invention is to provide a kind of photo induction touch-control unit and a kind of touch-control display panel that is provided with the photo induction touch-control unit, to promote the precision of touch-control input.
A preferred embodiment of the present invention provides a kind of photo induction touch-control unit, comprise that one first photo induction touch-control element is positioned at one first element region, and one second photo induction touch-control element is positioned at one second element region.The first photo induction touch-control element and the second photo induction touch-control element all are exposed under the surround lighting to small part, and the touch-control of photo induction touch-control unit input judges that absolute value with a difference of one second photoinduction signal of the one first photoinduction signal of the first photo induction touch-control element and the second photo induction touch-control element is as foundation.
Another preferred embodiment of the present invention provides a kind of touch-control display panel, comprises a display panel, and a photo induction touch-control unit.The photo induction touch-control unit comprises that one first photo induction touch-control element is positioned at one first element region, and one second photo induction touch-control element is positioned at one second element region.The first photo induction touch-control element and the second photo induction touch-control element all are exposed under the surround lighting to small part, and the touch-control of photo induction touch-control unit input judges that absolute value with a difference of one second photoinduction signal of the one first photoinduction signal of the first photo induction touch-control element and the second photo induction touch-control element is as foundation.
Because the present invention utilizes the absolute difference of the second photoinduction signal that the first photoinduction signal that the first photo induction touch-control element of photo induction touch-control unit sensed and the second photo induction touch-control element sensed as having judged whether the touch-control input, therefore can effectively get rid of the erroneous judgement that variation caused of surround lighting, and then increase the precision of touch-control input.
Description of drawings
Figure 1A and Figure 1B have illustrated the synoptic diagram of photoinduction element under regular event of known photoinduction formula contact panel;
Fig. 2 A and Fig. 2 B have illustrated the synoptic diagram of photoinduction element under abnormal operation of known photoinduction formula contact panel;
Fig. 3 A and Fig. 3 B have illustrated the synoptic diagram of the photo induction touch-control unit of one first preferred embodiment of the present invention;
Fig. 4 A and Fig. 4 B have illustrated the synoptic diagram of the photo induction touch-control unit of one second preferred embodiment of the present invention;
Fig. 5 A and Fig. 5 B have illustrated the synoptic diagram of the photo induction touch-control unit of one the 3rd preferred embodiment of the present invention;
Fig. 6 has illustrated the synoptic diagram of the photo induction touch-control unit of one the 4th preferred embodiment of the present invention;
Fig. 7 has illustrated the circuit framework synoptic diagram of the photo induction touch-control unit of a preferred embodiment of the present invention;
Fig. 8 has illustrated the circuit framework synoptic diagram of the photo induction touch-control unit of another preferred embodiment of the present invention;
Fig. 9 has illustrated the synoptic diagram of the touch-control display panel of a preferred embodiment of the present invention.
Wherein, Reference numeral
10 photoinduction elements, 12 input medias
The V1 first photoinduction signal V2 second photoinduction signal
30,40,50,60,120 photo induction touch-control unit, 32 first photo induction touch-control elements
34 second photo induction touch-control elements, 301 first element regions
302 second element regions, 36 input medias
42 first filter layers, 44 second filter layers
45 light-shielding pattern BL backlights
The Cst1 first storage capacitors Cst2 second storage capacitors
42 first signal read elements, 44 secondary signal read elements
52,56 transistor units, 54,58 amplifiers
100 touch-control display panels, 110 display panels
112 array base paltes, 114 colored optical filtering substrates
116 liquid crystal layer L surround lightings
Embodiment
For making those skilled in the art can further understand the present invention, hereinafter the spy enumerates preferred embodiment of the present invention, and cooperates appended accompanying drawing, describe in detail constitution content of the present invention and the effect desiring to reach.
Please refer to Fig. 3 A and Fig. 3 B.Fig. 3 A has illustrated the synoptic diagram of photo induction touch-control unit when not carrying out the touch-control input of one first preferred embodiment of the present invention, and Fig. 3 B has illustrated the synoptic diagram of photo induction touch-control unit when carrying out the touch-control input of first preferred embodiment of the present invention.As shown in Figure 3A, the photo induction touch-control unit 30 of present embodiment comprises that one first photo induction touch-control element 32 is positioned at one first element region 301, and one second photo induction touch-control element 34 be positioned at one second element region 302, wherein first element region 301 and second element region 302 can be adjacent setting, but not as limit.The first photo induction touch-control element 32 and the second photo induction touch-control element 34 all are exposed under the surround lighting L to small part, that is to say the place that exists at surround lighting L, and surround lighting L is not subjected under the situation that stops of foreign object, and the first photo induction touch-control element 32 and the second photo induction touch-control element 34 all can be subjected to the irradiation of surround lighting L when not carrying out the touch-control input.As shown in Figure 3A, when not carrying out the touch-control input, the first photo induction touch-control element 32 can produce one first photoinduction signal V1 because being subjected to the irradiation of surround lighting L, and the second photo induction touch-control element 34 can produce one second photoinduction signal V2 because being subjected to the irradiation of surround lighting L, and under the irradiation of the surround lighting L of same intensity, the first photoinduction signal V1 can be different from the second photoinduction signal V2.In addition, shown in Fig. 3 B, when carrying out the touch-control input, input media (for example finger) 36 can cover surround lighting L, this moment first, photo induction touch-control element 32 can produce one first photoinduction signal V1 because being subjected to the irradiation of more weak surround lighting L, and the second photo induction touch-control element 34 also can be because of in the irradiation of the backlight BL of more weak surround lighting L or oblique reflection and produce one second photoinduction signal V2, and the first photoinduction signal V1 is different from the second photoinduction signal V2.In addition, in the present embodiment, the sensitive time point of the sensitive time of the first photo induction touch-control element 32 and the second photo induction touch-control element 34 can be same time point or different time points, that is to say that the generation time point of the first photoinduction signal V1 and the generation time point of the second photoinduction signal V2 can be same time point or different time points.What deserves to be explained is that the first photo induction touch-control element 32 of the present invention and the second photo induction touch-control element 34 can be all types of photo induction touch-control elements, photoinduction transistor unit for example, but not as limit.
Please refer to table 1.Table 1 has been enumerated the judgment rule of two kinds of preferable touch-control inputs of the present invention.As shown in table 1, according to judgment rule 1, when the absolute difference of the first photoinduction signal V1 and the second photoinduction signal V2 during greater than a predetermined value (for example 0.5V), judge no touch-control input signal, and when the absolute difference of the first photoinduction signal V1 and the second photoinduction signal V2 during less than a predetermined value (for example 0.3V), judging has the touch-control input signal.According to judgment rule 2, when the absolute difference of the first photoinduction signal V1 and the second photoinduction signal V2 during less than a predetermined value (for example 0.3V), judge no touch-control input signal, and when the absolute difference of the first photoinduction signal V1 and the second photoinduction signal V2 during greater than a predetermined value (for example 0.5V), judging has the touch-control input signal.What deserves to be explained is and above-mentionedly respond to the different in addition change settings of the characteristic of touch control component or circuit design in order to the first photoinduction signal V1 that judges whether touch-control input and the predetermined value visible light of the absolute difference of the second photoinduction signal V2, and not as limit.
Judge that no touch-control input-signal judging has the touch-control input signal
Judgment rule 2 | V1-V2|＜0.3V＞0.5V
Table 1
From the above, photo induction touch-control of the present invention unit 30 comprises two photo induction touch-control elements, and the absolute difference of the second photoinduction signal V2 that sensed of the first photoinduction signal V1 that sensed of the first photo induction touch-control element 32 that utilizes photo induction touch-control unit 30 respectively and the second photo induction touch-control element 34 is as the foundation that judges whether the touch-control input, but not utilize same photo induction touch-control element to judge whether the touch-control input in the difference of two photoinduction signals that different time points sensed, therefore can effectively get rid of the erroneous judgement that variation caused of surround lighting L.In addition, the first photo induction touch-control element 32 of the present invention and the second photo induction touch-control element 34 have the first photoinduction signal V1 that can produce varying strength under identical surround lighting and the characteristic of the second photoinduction signal V2, or can utilize light-shielding pattern optionally to cover surround lighting or intensity backlight, or the practice of controlling backlight illumination partly makes the first photoinduction signal V1 have varying strength with the second photoinduction signal V2 at identical surround lighting, below will enumerate several embodiment that can reach above-mentioned characteristic and describe, but the present invention is not as limit.
Please refer to Fig. 4 A and Fig. 4 B.Fig. 4 A has illustrated the synoptic diagram of photo induction touch-control unit when not carrying out the touch-control input of one second preferred embodiment of the present invention, and Fig. 4 B has illustrated the synoptic diagram of photo induction touch-control unit when carrying out the touch-control input of second preferred embodiment of the present invention.Shown in Fig. 4 A, the photo induction touch-control unit 40 of present embodiment comprises that in addition one first filter layer 42 is positioned at first element region 301 and one second filter layer 44 is positioned at second element region 302, and wherein one first light transmission capacity of first filter layer 42 is different from one second light transmission capacity of second filter layer 44.Therefore in the present embodiment, first element region 301 is provided with a light-shielding pattern 45 in addition, and first light transmission capacity is less than second light transmission capacity, but the present invention is not as limit.For example, also can light-shielding pattern be set in second element region 302, and light-shielding pattern is not set in first element region 301, or use material respectively as the material of first filter layer 42 and second filter layer 44 with different transmittances, make the light transmission capacity of winning be different from second light transmission capacity.Setting by first filter layer 42 and second filter layer 44, when not carrying out the touch-control input, surround lighting L can have less intensity after by first filter layer 42, and after by second filter layer 44, can have bigger intensity, the therefore first photoinduction signal V1 that sensed of the first photo induction touch-control element 32 second photoinduction signal V2 that can be sensed less than the second photo induction touch-control element 34.In addition, shown in Fig. 4 B, when carrying out the touch-control input, surround lighting L can be transfused to device 36 to be stopped, therefore the first photo induction touch-control element 32 and the second photo induction touch-control element 34 can not be subjected to the irradiation of surround lighting L basically, so the first photoinduction signal V1 that the first photo induction touch-control element 32 is sensed can equal the second photoinduction signal V2 that the second photo induction touch-control element 34 is sensed substantially.What deserves to be explained is, when being applied to display panels, the back side of photo induction touch-control unit 40 can be shone by the backlight BL of display panels, and when input media 36 carries out the touch-control input in the front of photo induction touch-control unit 40, the backlight BL of oblique incidence can be transfused to device 36 and reflect, shown in the arrow of Fig. 4 B.Design by first filter layer 42 and second filter layer 44, can make the first photo induction touch-control element 32 and the second photo induction touch-control element 34 receive the backlight BL of the oblique reflection incident of approximate intensity, therefore the first photoinduction signal V1 that sensed of the first photo induction touch-control element 32 can equal the second photoinduction signal V2 that the second photo induction touch-control element 34 is sensed substantially.Whereby, whether because the absolute difference of the first photoinduction signal V1 and second photoinduction signal V2 difference to some extent when carrying out the touch-control input and not carrying out the touch-control input, therefore can judge has touch-control input.
Please refer to Fig. 5 A and Fig. 5 B.Fig. 5 A has illustrated the synoptic diagram of photo induction touch-control unit when not carrying out the touch-control input of one the 3rd preferred embodiment of the present invention, and Fig. 5 B has illustrated the synoptic diagram of photo induction touch-control unit when carrying out the touch-control input of the 3rd preferred embodiment of the present invention.Shown in Fig. 5 A, the photo induction touch-control unit 50 of present embodiment comprises that in addition at least one backlight BL is backlight in order to produce, and wherein this backlight BL is not in order to the backlight of display panels to be provided, but is applied on the photo induction touch-control unit 50.In the present embodiment, the backlight intensity of first element region 301 is different from the backlight intensity of second element region 302.For example, in the present embodiment, the backlight BL of first element region 301 can be lower than the backlight BL of second element region 302, and for example the intensity convergence of the backlight BL of first element region 301 zero, and the backlight BL of second element region 302 is much larger than zero, but not as limit.When not carrying out the touch-control input, the first photo induction touch-control element 32 and the second photo induction touch-control element 34 can be subjected to the irradiation of the surround lighting L of same intensity, and because the back side of the first photo induction touch-control element 32 and the second photo induction touch-control element 34 has shading characteristic, so can not be subjected to the irradiation of backlight BL.Therefore, the first photoinduction signal V1 that sensed of the first photo induction touch-control element 32 can equal the second photoinduction signal V2 that the second photo induction touch-control element 34 is sensed substantially.Shown in Fig. 5 B, when carrying out the touch-control input, surround lighting L can be transfused to device 36 to be stopped, therefore the first photo induction touch-control element 32 and the second photo induction touch-control element 34 can not be subjected to the irradiation of surround lighting L basically, but because the second photo induction touch-control element 34 of second element region 302 can receive the backlight BL of oblique reflection incident, and the first photo induction touch-control element 32 of first element region 301 can not receive the backlight BL of oblique reflection incident.Therefore, the first photoinduction signal V1 that sensed of the first photo induction touch-control element 32 second photoinduction signal V2 that can be sensed less than the second photo induction touch-control element 34.Whereby, whether because the absolute difference of the first photoinduction signal V1 and second photoinduction signal V2 difference to some extent when carrying out the touch-control input and not carrying out the touch-control input, therefore can judge has touch-control input.In addition, in the present embodiment, the light that backlight BL is launched can be visible light or invisible light.
Adjust the intensity of the received surround lighting L of the first photo induction touch-control element 32 and the second photo induction touch-control element 34 or provide the practice of backlight BL of varying strength except above-mentioned utilization, the present invention also can utilize the practice that makes the first photo induction touch-control element 32 and the second photo induction touch-control element 34 have different photoinduction sensitivity to realize the touch-control input.Please refer to Fig. 6.Fig. 6 has illustrated the synoptic diagram of the photo induction touch-control unit of one the 4th preferred embodiment of the present invention.As shown in Figure 6, in the present embodiment, the first photo induction touch-control element 32 and the second photo induction touch-control element 34 of photo induction touch-control unit 60 are respectively a photoinduction transistor unit, and the first photo induction touch-control element 32 has different passage breadth length ratios (W/L) with the second photo induction touch-control element 34, therefore the first photo induction touch-control element 32 has one first photoinduction sensitivity, the second photo induction touch-control element 34 has one second photoinduction sensitivity, and the first photoinduction sensitivity is different from the second photoinduction sensitivity.For example, as shown in Figure 6, the first photo induction touch-control element 32 has different passage lengths with the second photo induction touch-control element 34, and therefore the first photoinduction sensitivity is different from the second photoinduction sensitivity.Whereby, when carrying out the touch-control input and not carrying out the touch-control input, the absolute difference of the first photoinduction signal V1 and the second photoinduction signal V2 can be different, and can judge whether have the touch-control input signal.
Please refer to Fig. 7.Fig. 7 has illustrated the circuit framework synoptic diagram of the photo induction touch-control unit of a preferred embodiment of the present invention.As shown in Figure 7, first photo induction touch-control element 32 of present embodiment and one first storage capacitors Cst1 and one first signal read element 42 electrically connect.On the other hand, the second photo induction touch-control element 34 and one second storage capacitors Cst2 and a secondary signal read element 44 electrically connect.In the present embodiment, the first storage capacitors value of the first storage capacitors Cst1 is different from the second storage capacitors value of the second storage capacitors Cst2, and therefore the first photoinduction sensitivity meeting of the first photo induction touch-control element 32 is different from the second photoinduction sensitivity of the second photo induction touch-control element 34.Under this situation, when carrying out the touch-control input and not carrying out the touch-control input, the absolute difference of the first photoinduction signal V1 and the second photoinduction signal V2 can be different, and can judge whether have the touch-control input signal.
Please refer to Fig. 8.Fig. 8 has illustrated the circuit framework synoptic diagram of the photo induction touch-control unit of another preferred embodiment of the present invention.As shown in Figure 8, the first photo induction touch-control element 32 and a transistor unit 52 and an amplifier 54 electrically connect, and amplifier 54 and 42 electric connections of one first signal read element.On the other hand, the second photo induction touch-control element 34 and a transistor unit 56 and an amplifier 58 electrically connect, and amplifier 58 and a secondary signal read element 44 electric connections.
The circuit framework of photo induction touch-control of the present invention unit does not exceed with above-mentioned two kinds of circuit frameworks, and can be the circuit framework of other existing photo induction touch-control unit.
Please refer to Fig. 9.Fig. 9 has illustrated the synoptic diagram of the touch-control display panel of a preferred embodiment of the present invention.As shown in Figure 9, touch-control display panel 100 comprises a display panel 110, and a photo induction touch-control unit 120.In the present embodiment, display panel 110 can be a for example display panels, but not as limit, photo induction touch-control unit 120 then can be the described photo induction touch-control of aforementioned each embodiment unit, and its characteristic does not repeat them here as previously mentioned.In the present embodiment, display panel 110 comprises two substrates, for example an array basal plate 112 and a colored optical filtering substrates 114, and a liquid crystal layer 116 is arranged between array base palte 112 and the colored optical filtering substrates 114.Those skilled in the art comprise necessary elements such as pixel, storage capacitors, thin film transistor (TFT) and colored filter in addition when understanding display panel 110, so do not repeat them here.As shown in Figure 9, in the present embodiment, photo induction touch-control unit 120 is arranged between array base palte 112 and the colored optical filtering substrates 114, and its technology can with the process integration of display panel 110.In addition, position that what deserves to be explained is the first photo induction touch-control element 32 of photo induction touch-control unit 120 and the second photo induction touch-control element 34 is not limited to adjacent, and can optionally be arranged at diverse location.
In sum, the present invention utilizes the absolute difference of the second photoinduction signal that the first photoinduction signal that the first photo induction touch-control element of photo induction touch-control unit sensed and the second photo induction touch-control element sensed as having judged whether the touch-control input, but not utilize same photo induction touch-control element to judge whether the touch-control input in the difference of two photoinduction signals that different time points sensed, therefore can effectively get rid of the erroneous judgement that variation caused of surround lighting, and then increase the precision of touch-control input.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (19)
1. a photo induction touch-control unit is characterized in that, comprising:
One first photo induction touch-control element is positioned at one first element region; And
One second photo induction touch-control element is positioned at one second element region;
Wherein this first photo induction touch-control element and this second photo induction touch-control element all are exposed under the surround lighting to small part, and the input of the touch-control of this photo induction touch-control unit judges that absolute value with a difference of one second photoinduction signal of one first photoinduction signal of this first photo induction touch-control element and this second photo induction touch-control element is as foundation.
2. photo induction touch-control according to claim 1 unit, it is characterized in that, when the absolute value of this first photoinduction signal and this this difference of second photoinduction signal during less than one first predetermined value, judge that this photo induction touch-control unit has a touch-control input signal, when the absolute value of this first photoinduction signal and this this difference of second photoinduction signal during, judge that this photo induction touch-control unit does not have the touch-control input signal greater than one second predetermined value.
3. photo induction touch-control according to claim 1 unit, it is characterized in that, when the absolute value of this first photoinduction signal and this this difference of second photoinduction signal during greater than one first predetermined value, judge that this photo induction touch-control unit has a touch-control input signal, when the absolute value of this first photoinduction signal and this this difference of second photoinduction signal during, judge that this photo induction touch-control unit does not have the touch-control input signal less than one second predetermined value.
4. photo induction touch-control according to claim 1 unit, it is characterized in that, other comprises that one first filter layer is positioned at this first element region and one second filter layer is positioned at this second element region, and wherein one first light transmission capacity of this first filter layer is different from one second light transmission capacity of this second filter layer.
5. photo induction touch-control according to claim 4 unit is characterized in that, other comprises that a light-shielding pattern is positioned at this first element region, and this light-shielding pattern makes this first light transmission capacity of this first filter layer less than this second light transmission capacity of this second filter layer.
6. photo induction touch-control according to claim 1 unit is characterized in that, other comprises that at least one backlight is backlight in order to produce, and wherein this first element region backlight is different from the backlight of this second element region.
7. photo induction touch-control according to claim 1 unit, it is characterized in that, this first photo induction touch-control element has one first photoinduction sensitivity, and the second photo induction touch-control element has one second photoinduction sensitivity, and this first photoinduction sensitivity is different from this second photoinduction sensitivity.
8. photo induction touch-control according to claim 7 unit, it is characterized in that, other comprises that one first storage capacitors and this first photo induction touch-control element electrically connect, and one second storage capacitors and this second photo induction touch-control element electrically connect, and one first storage capacitors value of this first storage capacitors is different from one second storage capacitors value of this second storage capacitors.
9. photo induction touch-control according to claim 7 unit, it is characterized in that, this first photo induction touch-control element and this second photo induction touch-control element are respectively a photoinduction transistor unit, and this first photo induction touch-control element has different passage breadth length ratios with this second photo induction touch-control element.
10. a touch-control display panel is characterized in that, comprising:
One display panel; And
One photo induction touch-control unit comprises: one first photo induction touch-control element is positioned at one first element region; And one second photo induction touch-control element, be positioned at one second element region;
Wherein this first photo induction touch-control element and this second photo induction touch-control element all are exposed under the surround lighting to small part, and the input of the touch-control of this photo induction touch-control unit judges that absolute value with a difference of one second photoinduction signal of one first photoinduction signal of this first photo induction touch-control element and this second photo induction touch-control element is as foundation.
11. touch-control display panel according to claim 10 is characterized in that, this display panel comprises two substrates, and this photo induction touch-control unit is arranged between this two substrates.
12. touch-control display panel according to claim 10, it is characterized in that, when the absolute value of this first photoinduction signal and this this difference of second photoinduction signal during less than one first predetermined value, judge that this photo induction touch-control unit has a touch-control input signal, when the absolute value of this first photoinduction signal and this this difference of second photoinduction signal during, judge that this photo induction touch-control unit does not have the touch-control input signal greater than one second predetermined value.
13. touch-control display panel according to claim 10, it is characterized in that, when the absolute value of this first photoinduction signal and this this difference of second photoinduction signal during greater than one first predetermined value, judge that this photo induction touch-control unit has a touch-control input signal, when the absolute value of this first photoinduction signal and this this difference of second photoinduction signal during, judge that this photo induction touch-control unit does not have the touch-control input signal less than one second predetermined value.
14. touch-control display panel according to claim 10, it is characterized in that, other comprises that one first filter layer is positioned at this first element region and one second filter layer is positioned at this second element region, and wherein one first light transmission capacity of this first filter layer is different from one second light transmission capacity of this second filter layer.
15. touch-control display panel according to claim 14 is characterized in that, other comprises that a light-shielding pattern is positioned at this first element region, and this light-shielding pattern makes this first light transmission capacity of this first filter layer less than this second light transmission capacity of this second filter layer.
16. touch-control display panel according to claim 10 is characterized in that, other comprises that at least one backlight is backlight in order to produce, and wherein this first element region backlight is different from the backlight of this second element region.
17. touch-control display panel according to claim 10, it is characterized in that, this first photo induction touch-control element has one first photoinduction sensitivity, and the second photo induction touch-control element has one second photoinduction sensitivity, and this first photoinduction sensitivity is different from this second photoinduction sensitivity.
18. touch-control display panel according to claim 17, it is characterized in that, other comprises that one first storage capacitors and this first photo induction touch-control element electrically connect, and one second storage capacitors and this second photo induction touch-control element electrically connect, and one first storage capacitors value of this first storage capacitors is different from one second storage capacitors value of this second storage capacitors.
19. touch-control display panel according to claim 17, it is characterized in that, this first photo induction touch-control element and this second photo induction touch-control element are respectively a photoinduction transistor unit, and this first photo induction touch-control element has different passage breadth length ratios with this second photo induction touch-control element.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW99139690A TWI419032B (en) | 2010-11-18 | 2010-11-18 | Optical touch sensing unit and touch display panel |
| TW099139690 | 2010-11-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102073421A true CN102073421A (en) | 2011-05-25 |
| CN102073421B CN102073421B (en) | 2014-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010623277.1A Expired - Fee Related CN102073421B (en) | 2010-11-18 | 2010-12-27 | Photoinduction touch unit and touch display panel |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102073421B (en) |
| TW (1) | TWI419032B (en) |
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| CN102402347A (en) * | 2011-09-01 | 2012-04-04 | 友达光电股份有限公司 | Light-sensitive input panel and display device with light-sensitive input mechanism |
| CN105094466A (en) * | 2015-08-12 | 2015-11-25 | 小米科技有限责任公司 | Environmental light measurement method and device |
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| TWI488091B (en) * | 2012-10-09 | 2015-06-11 | Au Optronics Corp | Optical touch display panel |
| TWI588716B (en) * | 2016-03-23 | 2017-06-21 | 友達光電股份有限公司 | Optical sensing circuit and display panel utilizing the same |
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Also Published As
| Publication number | Publication date |
|---|---|
| TWI419032B (en) | 2013-12-11 |
| CN102073421B (en) | 2014-07-09 |
| TW201222364A (en) | 2012-06-01 |
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